High-precision positioning die frame special for numerical control machining

Abstract

The invention discloses a high-precision positioning numerical control machining special mold frame, and relates to the technical field of numerical control machining equipment, the high-precision positioning numerical control machining special mold frame comprises a mounting bottom plate, an X-axis and Y-axis moving mechanism is arranged at the top of the mounting bottom plate, a height adjusting mechanism is arranged at the top of the X-axis and Y-axis moving mechanism, and a mold fixing mechanism is arranged at the top of the height adjusting mechanism; according to the high-precision positioning die frame special for numerical control machining, only one first servo motor is arranged in the X-axis and Y-axis moving mechanism to serve as a power source, a first moving seat can move on a first one-way threaded rod, a second moving seat can move on a second one-way threaded rod, and therefore movement in the X-axis direction and the Y-axis direction is achieved; the problems that in the using process of an existing device, two driving sources are used for driving a first movable frame to move on a second movable frame in the X-axis direction and the Y-axis direction, so that the manufacturing cost of the device is increased, energy consumption is increased, and the using effect is poor are solved.

Description

Technical Field

[0001] The invention relates to the technical field of numerical control processing equipment, in particular to a high-precision positioning special-purpose numerical control processing die frame. Background Art

[0002] In the CNC machining process, the mold frame is an important device for supporting and fixing the mold, and its positioning accuracy directly affects the mold machining accuracy and product quality.

[0003] In the working process of the existing device, a metal piece can be placed through the clamping and positioning seat, and then the metal piece is clamped and fixed by opening the hydraulic telescopic rod, and then the servo motors on the two sliding seats are turned on to drive the first movable frame and the second movable frame to slide alternately, so that the first movable frame can be driven to move along the X-axis and Y-axis on the second movable frame. At the same time, the laser rangefinder connected through the first movable frame and the second movable frame can detect the distance between the two moving sliding seats.

[0004] However, the existing device has the following shortcomings during use:

[0005] During use, the existing device is convenient for accurately controlling the displacement distance, has a reasonable structure, and is convenient for accurate positioning and processing of metal parts. However, the servo motors on the two sliding seats drive the first movable frame and the second movable frame to slide alternately, and two driving sources are used to drive the first movable frame to move along the X-axis and Y-axis on the second movable frame, which increases the manufacturing cost of the device and increases the energy consumption, and the use effect is poor.

[0006] Therefore, we proposed a special mold frame for CNC machining with high-precision positioning to solve the above problems. Summary of the invention

[0007] The object of the present invention is to provide a high-precision positioning special mold frame for CNC machining. By only setting a first servo motor as a power source in the X-axis and Y-axis moving mechanism, through the switching of the first electromagnetic clutch and the second electromagnetic clutch, and the transmission coordination of the first worm, the second worm, the first worm wheel, the second worm wheel, the synchronous belt, the rotating wheel and other components, the first moving seat can be moved on the first unidirectional threaded rod and the second moving seat can be moved on the second unidirectional threaded rod, thereby realizing movement along the X-axis and Y-axis directions to solve the problems raised by the above-mentioned background technology.

[0008] To achieve the above object, the present invention provides the following technical solution: a high-precision positioning special mold frame for CNC machining, comprising a mounting base plate, an X-axis and Y-axis moving mechanism is arranged on the top of the mounting base plate, a height adjustment mechanism is arranged on the top of the X-axis and Y-axis moving mechanism, and a mold fixing mechanism is arranged on the top of the height adjustment mechanism;

[0009] The X-axis and Y-axis moving mechanism includes a fixed plate, two first one-way threaded rods are connected between the two fixed plates through two sets of self-locking bearings, the outer surfaces of the two first one-way threaded rods are sleeved with a first moving seat, the smooth ends of the two first one-way threaded rods movably pass through one of the fixed plates, the outer surfaces of the two first one-way threaded rods are fixedly sleeved with a rotating wheel, the outer surfaces of the two rotating wheels are transmission-connected with a synchronous belt, a sliding groove and a groove are provided on one side of the first moving seat, the inner side of the sliding groove is rotatably connected with a second one-way threaded rod, a movable sleeve is rotatably installed in the groove, the outer surface of the movable sleeve is fixedly sleeved with a first bevel gear, the inner surface of the movable sleeve is provided with a limiting groove, and one end of the second one-way threaded rod is fixedly connected with a first Two helical gears, a rotating rod is connected between the two fixed plates through two self-locking bearings, the outer surface of the rotating rod is fixedly connected to a limited position block, the outer surface of the second one-way threaded rod is sleeved with a second movable seat, the top of the mounting base plate is fixedly installed with a first servo motor, a rotating shaft is arranged on the top of the mounting base plate, the outer surface of the rotating shaft is fixedly sleeved with a first worm gear, one end of the rotating rod movably passes through one of the fixed plates and is connected to the rotating shaft through a first electromagnetic clutch, the output end of the first servo motor is fixedly connected with a first worm, a second worm is arranged on the top of the mounting base, one end of the first worm is connected to the second worm through a second electromagnetic clutch, and the outer surface of one of the first one-way threaded rods is fixedly sleeved with a second worm gear.

[0010] Preferably, the height adjustment mechanism includes a first support plate, a bidirectional threaded rod is connected between the two first support plates via two self-locking bearings, a movable groove is opened on one side of the first support plate, a movable block is slidably connected in the movable groove, the movable block is fixedly connected to the lifting plate, a first moving block is sleeved on the outer surface of the bidirectional threaded rod, a connecting block is fixedly connected to the bottom of the lifting plate, and a connecting rod is hinged to the first moving block and one side of the connecting block.

[0011] Preferably, a lifting platform is fixedly connected to the top of the lifting plate, a first laser rangefinder is installed on the top of the second movable seat, a second servo motor is fixedly installed on one side of one of the first support plates, and the output end of the second servo motor movably passes through one of the first support plates and is fixedly connected to the smooth end of the bidirectional threaded rod.

[0012] Preferably, the mold fixing mechanism includes a spur gear, which is rotatably installed on the top of the lifting platform. A linear guide is installed on the top of the lifting platform. A second moving block is slidably connected to the linear guide. A rack is fixedly connected to one side of the second moving block, and the rack is meshingly connected to the spur gear.

[0013] Preferably, the top of the lifting platform is fixedly connected to a limiting frame, the limiting frame is slidably connected to the rack, and the top of the second moving block is fixedly connected to a clamping plate.

[0014] Preferably, a mounting block is fixedly connected to the top of the lifting platform, an electric push rod is fixedly installed on one side of the mounting block, the telescopic end of the electric push rod movably passes through the mounting block and is fixedly connected to one of the second movable blocks, and a placement shell is fixedly connected to the top of the lifting platform, a through slot is opened on the top of the placement shell, and the splint movably passes through the through slot.

[0015] Preferably, a second laser rangefinder is installed on the inner side of the slide groove, a support member is fixedly connected to the top of the first movable seat, and a smooth end of the second one-way threaded rod is movably inserted into the support member.

[0016] Preferably, a third laser rangefinder is installed on one side of the other fixed plate, and a second supporting plate is fixedly connected to the top of the mounting base plate.

[0017] Preferably, one end of the second worm rotates with the second support plate, and the top of the mounting base is fixedly connected with a third support plate.

[0018] Preferably, one end of the rotating shaft is rotatably connected to the third supporting plate, and a PLC controller is installed on the top of the mounting base plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention, by only setting a first servo motor as a power source in the X-axis and Y-axis moving mechanism, can realize the movement of the first moving seat on the first unidirectional threaded rod and the movement of the second moving seat on the second unidirectional threaded rod through the switching of the first electromagnetic clutch and the second electromagnetic clutch, and the transmission cooperation of the first worm, the second worm, the first worm wheel, the second worm wheel, the synchronous belt, the rotating wheel and other components, thereby realizing the movement along the X-axis and Y-axis directions, reducing the manufacturing cost of the device, reducing energy consumption, and solving the problem that in the existing device, two driving sources are used to drive the first movable frame to move on the second movable frame along the X-axis and Y-axis directions during use, which increases the manufacturing cost of the device, increases energy consumption, and has poor use effect.

[0021] 2. In the present invention, the second servo motor in the height adjustment mechanism drives the bidirectional threaded rod to rotate, thereby driving the first movable block to move on the bidirectional threaded rod. The connecting rod and the connecting block are hinged so that the lifting plate can slide up and down in the movable groove of the first support plate, thereby realizing the adjustment of the lifting platform height, facilitating the adjustment of the mold to different height positions to meet different processing requirements, and the adjustment is convenient.

[0022] 3. The present invention drives one of the second movable blocks to move by the electric push rod in the mold fixing mechanism, and drives the other second movable block to move in the opposite direction through the meshing transmission of the rack and the spur gear, so as to realize the clamping and loosening actions of the two clamps on the mold. The rack is limited by the limit frame to ensure the stability of the movement, and the placement shell and the through groove are arranged so that the clamp can better fix the mold. At the same time, the overall structure can adapt to molds of different sizes, thereby improving the versatility and practicality of the mold frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional diagram of the main structure of a high-precision positioning special mold frame for CNC machining of the present invention;

[0024] Figure 2 This is a three-dimensional diagram of the rear structure of a high-precision positioning CNC machining special mold frame of the present invention;

[0025] Figure 3 This is a right structural stereogram of a high-precision positioning special mold frame for CNC machining of the present invention;

[0026] Figure 4 This is a structural stereogram of a support member in a high-precision positioning CNC machining special mold frame of the present invention;

[0027] Figure 5 It is a partially unfolded structural stereogram of a movable sleeve and a rotating rod in a high-precision positioning special mold frame for numerical control machining of the present invention;

[0028] Figure 6 This is a structural stereogram of a height adjustment mechanism in a high-precision positioning CNC machining special mold frame of the present invention;

[0029] Figure 7 It is a three-dimensional diagram of the unfolded structure of the housing and the lifting platform in a high-precision positioning special mold frame for numerical control machining of the present invention;

[0030] Figure 8 The present invention is a structural stereogram of a rotating shaft in a high-precision positioning CNC machining special mold frame.

[0031] In the figure: 1, mounting base plate; 2, X-axis and Y-axis moving mechanism; 201, fixed plate; 202, first one-way threaded rod; 203, first moving seat; 204, rotating wheel; 205, synchronous belt; 206, slide groove; 207, groove; 208, second one-way threaded rod; 209, movable sleeve; 210, first bevel gear; 211, limit groove; 212, second bevel gear; 213, rotating rod; 214, limit block; 215, second moving seat; 216, second laser rangefinder; 217, support member; 218, first servo motor; 219, rotating shaft; 220, first worm gear; 221, first electromagnetic clutch; 222, first worm; 223, second worm; 224, second electromagnetic clutch; 225, second worm gear; 226, second support plate; 227, third support plate; 228, third laser rangefinder; 3, height adjustment mechanism; 301, first support plate; 302, bidirectional threaded rod; 303, movable groove; 304, movable block; 305, lifting plate; 306, first moving block; 307, connecting block; 308, connecting rod; 309, lifting platform; 310, first laser rangefinder; 311, second servo motor; 4, mold fixing mechanism; 401, spur gear; 402, linear guide rail; 403, second moving block; 404, rack; 405, limit frame; 406, clamp; 407, mounting block; 408, electric push rod; 409, placement shell; 410, through slot; 5, PLC controller. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1 - Figure 8 As shown, the present invention provides a technical solution: a high-precision positioning special mold frame for CNC machining, comprising a mounting base plate 1, an X-axis and Y-axis moving mechanism 2 is arranged on the top of the mounting base plate 1, a height adjustment mechanism 3 is arranged on the top of the X-axis and Y-axis moving mechanism 2, and a mold fixing mechanism 4 is arranged on the top of the height adjustment mechanism 3;

[0034] The X-axis and Y-axis moving mechanism 2 includes a fixed plate 201, two first one-way threaded rods 202 are connected between the two fixed plates 201 through two sets of self-locking bearings, the outer surfaces of the two first one-way threaded rods 202 are sleeved with a first moving seat 203, the smooth ends of the two first one-way threaded rods 202 are movably inserted into one of the fixed plates 201, the outer surfaces of the two first one-way threaded rods 202 are fixedly sleeved with a rotating wheel 204, the outer surfaces of the two rotating wheels 204 are transmission-connected with a synchronous belt 205, a sliding groove 206 and a groove 207 are provided on one side of the first moving seat 203, the inner side of the sliding groove 206 is rotatably connected with a second one-way threaded rod 208, a movable sleeve 209 is rotatably installed in the groove 207, the outer surface of the movable sleeve 209 is fixedly sleeved with a first bevel gear 210, the inner surface of the movable sleeve 209 is provided with a limiting groove 211, one end of the second one-way threaded rod 208 is fixedly connected with a second bevel gear 210, Gear 212, a rotating rod 213 is connected between the two fixed plates 201 through two self-locking bearings, the outer surface of the rotating rod 213 is fixedly connected to the limiting block 214, the outer surface of the second one-way threaded rod 208 is sleeved with a second moving seat 215, a first servo motor 218 is fixedly installed on the top of the mounting base plate 1, a rotating shaft 219 is arranged on the top of the mounting base plate 1, and the outer surface of the rotating shaft 219 is fixedly sleeved with a first worm gear 220, one end of the rotating rod 213 movably passes through one of the fixed plates 201 and is connected to the rotating shaft 219 through a first electromagnetic clutch 221, the output end of the first servo motor 218 is fixedly connected to a first worm 222, a second worm 223 is arranged on the top of the mounting base plate 1, one end of the first worm 222 is connected to the second worm 223 through a second electromagnetic clutch 224, and a second worm gear 225 is fixedly sleeved on the outer surface of one of the first one-way threaded rods 202.

[0035] like Figure 6As shown, the height adjustment mechanism 3 includes a first support plate 301, a bidirectional threaded rod 302 is connected between the two first support plates 301 through two self-locking bearings, a movable groove 303 is opened on one side of the first support plate 301, a movable block 304 is slidably connected in the movable groove 303, the movable block 304 is fixedly connected to the lifting plate 305, a first moving block 306 is sleeved on the outer surface of the bidirectional threaded rod 302, a connecting block 307 is fixedly connected to the bottom of the lifting plate 305, a connecting rod 308 is hinged on one side of the first moving block 306 and the connecting block 307, and the bidirectional threaded rod 302 is connected to the lifting plate 305. The first moving block 306 is threadedly connected, and the setting of the bidirectional threaded rod 302 enables the two first moving blocks 306 to move towards or away from each other at the same time when it rotates. The horizontal movement of the first moving block 306 is converted into the vertical lifting movement of the lifting plate 305 through the hinge connection of the connecting rod 308 and the connecting block 307. The self-locking bearing ensures the stability of the position of the bidirectional threaded rod 302 after it stops rotating. The cooperation of the movable groove 303 and the movable block 304 ensures that the lifting plate 305 moves smoothly in the vertical direction, thereby realizing precise adjustment of the mold height to meet different processing requirements.

[0036] like Figure 6 As shown, a lifting platform 309 is fixedly connected to the top of the lifting plate 305, a first laser rangefinder 310 is installed on the top of the second movable seat 215, a second servo motor 311 is fixedly installed on one side of one of the first support plates 301, the output end of the second servo motor 311 moves through one of the first support plates 301 and is fixedly connected to the smooth end of the bidirectional threaded rod 302, and a stable installation plane is provided for the mold through the lifting platform 309. The first laser rangefinder 310 can monitor the displacement distance of the lifting platform 309, and combined with the data of the third laser rangefinder 228 and the second laser rangefinder 216, it is convenient to accurately control the displacement distance, and can more accurately determine the position of the mold in space. The second servo motor 311 provides power for the rotation of the bidirectional threaded rod 302, and its precise control performance makes the height adjustment more accurate and convenient.

[0037] like Figure 7 As shown, the mold fixing mechanism 4 includes a spur gear 401, which is rotatably installed on the top of the lifting platform 309. A linear guide 402 is installed on the top of the lifting platform 309. A second moving block 403 is slidably connected to the linear guide 402. A rack 404 is fixedly connected to one side of the second moving block 403. The rack 404 is meshingly connected to the spur gear 401. The linear guide 402 provides a guide for linear motion for the second moving block 403, thereby ensuring the smoothness of the movement. The meshing transmission of the spur gear 401 and the rack 404 enables the movement of one second moving block 403 to drive the other second moving block 403 to move in the opposite direction, thereby realizing the rapid clamping and releasing operations of the mold and improving the work efficiency.

[0038] like Figure 7 As shown, the top of the lifting platform 309 is fixedly connected with a limit frame 405, and the limit frame 405 is slidably connected to the rack 404. The top of the second moving block 403 is fixedly connected with a clamp 406. The limit frame 405 limits the sliding of the rack 404 to prevent the rack 404 from shifting during the movement, thereby ensuring the accuracy and stability of the transmission. The clamp 406 is used to directly clamp the mold to ensure that the mold will not be displaced during the processing, thereby improving the processing accuracy.

[0039] like Figure 7 As shown, the top of the lifting platform 309 is fixedly connected with a mounting block 407, and an electric push rod 408 is fixedly installed on one side of the mounting block 407. The telescopic end of the electric push rod 408 movably passes through the mounting block 407 and is fixedly connected to one of the second moving blocks 403. The top of the lifting platform 309 is fixedly connected with a placement shell 409, and a through slot 410 is provided on the top of the placement shell 409. The splint 406 movably passes through the through slot 410. The electric push rod 408 provides power for the movement of the second moving block 403, and its telescopic movement can accurately control the clamping force and clamping position of the splint 406. The placement shell 409 provides a placement space for the mold, and the through slot 410 provides a channel for the movement of the splint 406.

[0040] like Figure 5 As shown, a second laser rangefinder 216 is installed on the inner side of the slide groove 206, a support 217 is fixedly connected to the top of the first movable seat 203, and the smooth end of the second one-way threaded rod 208 is movably inserted in the support 217. The second laser rangefinder 216 can detect the spacing of the moving second movable seat 215 to provide data for the precise control of the X-axis and Y-axis moving mechanism 2. The support 217 supports the second one-way threaded rod 208, ensures the stability of the second one-way threaded rod 208 during rotation, and reduces shaking and errors.

[0041] like Figure 5 and Figure 8 As shown, a third laser rangefinder 228 is installed on one side of the other fixed plate 201, and a second support plate 226 is fixedly connected to the top of the mounting base plate 1. The third laser rangefinder 228 can monitor the displacement distance of the first movable seat 203, and cooperates with the second laser rangefinder 216 and the first laser rangefinder 310 to achieve all-round and accurate measurement of the mold in the X-axis, Y-axis and Z-axis directions. The second support plate 226 provides a support and rotation basis for the second worm 223, ensuring the stability of the transmission mechanism.

[0042] like Figure 8As shown, one end of the second worm 223 rotates with the second support plate 226, and the top of the mounting base 1 is fixedly connected with a third support plate 227. The second support plate 226 and the third support plate 227 provide stable support and rotation points for the second worm 223 and the rotating shaft 219 respectively, making the structure of the entire transmission system more stable, reducing the errors caused by the shaking of components, and improving the positioning accuracy of the mold frame.

[0043] like Figure 8 As shown, one end of the rotating shaft 219 is rotatably connected to the third support plate 227, and a PLC controller 5 is installed on the top of the mounting base 1. The third support plate 227 ensures the stable rotation of the rotating shaft 219. The PLC controller 5 can centrally control the first servo motor 218, the second servo motor 311, the first electromagnetic clutch 221, the second electromagnetic clutch 224 and the electric push rod 408 and other components, and accurately adjust the position and fixing state of the mold according to the data fed back by the laser rangefinder to realize automated and high-precision positioning processing.

[0044] The method of use and working principle of the device are as follows: when in use, the mounting base plate 1 is placed on the CNC machining workbench, and the mounting base plate 1 is mounted on the workbench by bolts, and then the mold to be processed is placed on the top of the lifting shell 409 and located between the two clamping plates 406, and the electric push rod 408 is started by the PLC controller 5, and the telescopic end of the electric push rod 408 pushes one of the second moving blocks 403 to move on the linear guide 402. Since the rack 404 is meshed with the spur gear 401, the movement of one second moving block 403 will drive the other second moving block 403 to move in the opposite direction, so that the clamping plate 406 passes through the through slot 410 to clamp and fix the mold. According to the processing requirements, the first electromagnetic is controlled by the PLC controller 5. The coupling and separation of the clutch 221 and the second electromagnetic clutch 224, if the movement in the X-axis direction is to be realized, the second electromagnetic clutch 224 is coupled and the first electromagnetic clutch 221 is separated, the first servo motor 218 is started through the PLC controller 5, the first servo motor 218 drives the first worm 222 to rotate, the first worm 222 drives the second worm 223 to rotate through the second electromagnetic clutch 224, the second worm 223 is meshed with the second worm wheel 225, thereby driving one of the first one-way threaded rods 202 to rotate, because the two first one-way threaded rods 202 are connected by the rotating wheel 204 and the synchronous belt 205, so the two first one-way threaded rods 202 rotate synchronously, and at the same time, the two first one-way threaded rods 202 are screwed with the first moving seat 203 The first movable seat 203 is connected with the first unidirectional threaded rod 202, thereby driving the first movable seat 203 to move in the X-axis direction on the first unidirectional threaded rod 202. At the same time, the third laser rangefinder 228 monitors the displacement distance of the first movable seat 203. If the movement in the Y-axis direction is to be realized, the first electromagnetic clutch 221 is engaged, and the second electromagnetic clutch 224 is separated. The first servo motor 218 is started through the PLC controller 5. The first servo motor 218 drives the first worm 222 to rotate. The first worm 222 is meshed with the first worm wheel 220 to drive the rotating shaft 219 to rotate. The rotating shaft 219 drives the rotating rod 213 to rotate through the first electromagnetic clutch 221. The rotating rod 213 is slidably connected with the movable sleeve 209, and the limit block 214 on the rotating rod 213 is matched with the limit groove 211 in the movable sleeve 209. The movable sleeve 209 is engaged, driving the movable sleeve 209 to rotate, the first bevel gear 210 on the movable sleeve 209 is meshed with the second bevel gear 212, thereby driving the second one-way threaded rod 208 to rotate, the second one-way threaded rod 208 is threadedly connected with the second movable seat 215, so that the second movable seat 215 moves in the Y-axis direction on the second one-way threaded rod 208, and the second laser rangefinder 216 detects the displacement distance of the second movable seat 215. When the mold height needs to be adjusted, the second servo motor 311 is started through the PLC controller 5, and the second servo motor 311 drives the bidirectional threaded rod 302 to rotate. The two first movable blocks 306 on the bidirectional threaded rod 302 move toward or away from each other under the rotation of the two first movable blocks 306, and the connecting rod 308 is hinged with the connecting block 307.The horizontal movement of the first moving block 306 is converted into the vertical lifting movement of the lifting plate 305, so as to adjust the height of the lifting platform 309. At the same time, the first laser rangefinder 310 monitors the displacement distance of the lifting platform 309, so as to accurately position the mold. After the processing is completed, the electric push rod 408 is controlled to retract through the PLC controller 5, so that the clamping plate 406 releases the mold, and the processed mold can be taken out.

[0045] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-precision positioning CNC machining special mold frame, characterized in that: It comprises a mounting base plate (1), an X-axis and Y-axis moving mechanism (2) is arranged on the top of the mounting base plate (1), a height adjustment mechanism (3) is arranged on the top of the X-axis and Y-axis moving mechanism (2), and a mold fixing mechanism (4) is arranged on the top of the height adjustment mechanism (3); The X-axis and Y-axis moving mechanism (2) comprises a fixed plate (201), two first one-way threaded rods (202) are connected between the two fixed plates (201) via two sets of self-locking bearings, the outer surfaces of the two first one-way threaded rods (202) are sleeved with a first moving seat (203), the smooth ends of the two first one-way threaded rods (202) are movably inserted into one of the fixed plates (201), the outer surfaces of the two first one-way threaded rods (202) are fixedly sleeved with a rotating wheel (204), and the outer surfaces of the two rotating wheels (204) are The transmission is connected with a synchronous belt (205); a slide groove (206) and a groove (207) are provided on one side of the first movable seat (203); a second one-way threaded rod (208) is rotatably connected to the inner side of the slide groove (206); a movable sleeve (209) is rotatably installed in the groove (207); a first bevel gear (210) is fixedly sleeved on the outer surface of the movable sleeve (209); a limiting groove (211) is provided on the inner surface of the movable sleeve (209); one end of the second one-way threaded rod (208) is fixedly connected to the second bevel gear (210); A rotating rod (213) is connected between the two fixed plates (201) via two self-locking bearings, the outer surface of the rotating rod (213) is fixedly connected to a limiting block (214), the outer surface of the second one-way threaded rod (208) is sleeved with a second movable seat (215), a first servo motor (218) is fixedly installed on the top of the mounting base plate (1), a rotating shaft (219) is provided on the top of the mounting base plate (1), the outer surface of the rotating shaft (219) is fixedly sleeved with a first worm gear (220), and the rotating rod ( One end of the first servo motor (213) movably passes through one of the fixed plates (201) and is connected to the rotating shaft (219) through a first electromagnetic clutch (221); the output end of the first servo motor (218) is fixedly connected to a first worm (222); a second worm (223) is arranged on the top of the mounting base plate (1); one end of the first worm (222) is connected to the second worm (223) through a second electromagnetic clutch (224); and a second worm wheel (225) is fixedly sleeved on the outer surface of one of the first one-way threaded rods (202).

2. The high-precision positioning special mold frame for CNC machining according to claim 1 is characterized in that: The height adjustment mechanism (3) comprises a first support plate (301), two bidirectional threaded rods (302) are connected between the two first support plates (301) via two self-locking bearings, a movable groove (303) is provided on one side of the first support plate (301), a movable block (304) is slidably connected in the movable groove (303), the movable block (304) is fixedly connected to a lifting plate (305), a first moving block (306) is sleeved on the outer surface of the bidirectional threaded rod (302), a connecting block (307) is fixedly connected to the bottom of the lifting plate (305), and a connecting rod (308) is hinged between the first moving block (306) and one side of the connecting block (307).

3. The high-precision positioning special mold frame for CNC machining according to claim 2 is characterized in that: The top of the lifting plate (305) is fixedly connected to a lifting platform (309), the top of the second movable seat (215) is installed with a first laser rangefinder (310), one side of one of the first support plates (301) is fixedly installed with a second servo motor (311), the output end of the second servo motor (311) movably passes through one of the first support plates (301) and is fixedly connected to the smooth end of the bidirectional threaded rod (302).

4. The high-precision positioning special mold frame for CNC machining according to claim 3 is characterized in that: The mold fixing mechanism (4) comprises a spur gear (401), which is rotatably mounted on the top of the lifting platform (309), and a linear guide rail (402) is mounted on the top of the lifting platform (309). A second moving block (403) is slidably connected to the linear guide rail (402), and a rack (404) is fixedly connected to one side of the second moving block (403), and the rack (404) is meshingly connected to the spur gear (401).

5. The high-precision positioning special mold frame for CNC machining according to claim 4, characterized in that: The top of the lifting platform (309) is fixedly connected to a limiting frame (405), the limiting frame (405) is slidably connected to the rack (404), and the top of the second moving block (403) is fixedly connected to a clamping plate (406).

6. The high-precision positioning special mold frame for CNC machining according to claim 5, characterized in that: The top of the lifting platform (309) is fixedly connected to a mounting block (407), one side of the mounting block (407) is fixedly installed with an electric push rod (408), the telescopic end of the electric push rod (408) movably passes through the mounting block (407) and is fixedly connected to one of the second moving blocks (403), the top of the lifting platform (309) is fixedly connected to a placement shell (409), the top of the placement shell (409) is provided with a through slot (410), and the clamping plate (406) movably passes through the through slot (410).

7. The high-precision positioning special mold frame for CNC machining according to claim 1, characterized in that: A second laser rangefinder (216) is installed inside the slide groove (206), a support member (217) is fixedly connected to the top of the first movable seat (203), and a smooth end of the second one-way threaded rod (208) is movably inserted into the support member (217).

8. The high-precision positioning special mold frame for CNC machining according to claim 1, characterized in that: A third laser rangefinder (228) is installed on one side of the other fixed plate (201), and a second support plate (226) is fixedly connected to the top of the mounting base plate (1).

9. The high-precision positioning special mold frame for CNC machining according to claim 8, characterized in that: One end of the second worm (223) rotates with the second support plate (226), and the top of the mounting base plate (1) is fixedly connected to a third support plate (227).

10. The high-precision positioning special mold frame for CNC machining according to claim 9, characterized in that: One end of the rotating shaft (219) is rotatably connected to the third supporting plate (227), and a PLC controller (5) is installed on the top of the mounting base plate (1).

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