A positioning tool for fan housing production

Abstract

The present invention provides a positioning tool for fan casing production, which relates to the field of fan casing positioning, including: a machine tool; a drilling device is installed on the rear side of the upper end surface of the machine tool, and a controller is installed on the right side of the upper end surface of the machine tool; a rotary feeding mechanism is installed on the machine tool, and four expansion-type positioning mechanisms are installed in a circular array on the upper part of the rotary feeding mechanism. Through the setting of the rotary feeding mechanism, a fan casing with holes drilled in the front can be removed and replaced while drilling a fan casing at the rear, thereby greatly shortening the waiting time and improving the production efficiency of the fan casing; it solves the problem that the current positioning tool for fan casing production needs to remove the fan casing with holes drilled from the positioning tool before fixing the next fan casing to the positioning tool when encountering a large number of fan casings to be processed, thereby reducing the production efficiency of the fan casing.

Description

Technical Field

[0001] The invention relates to the technical field of fan casing positioning, and in particular to a positioning tool for fan casing production. Background Art

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Fans can be divided into centrifugal fans, axial flow fans, rotary fans, constant flow fans, etc. Fans are generally composed of fan housing, fan impeller, fan motor, fan support frame and other parts. At present, the fan housing needs to be positioned by positioning tooling during the production process such as drilling.

[0003] However, when the positioning tool used in the current fan casing production encounters a large number of fan casings to be processed, the fan casings with holes drilled need to be removed from the positioning tool first, and then the next fan casing can be fixed to the positioning tool, and then the next fan casing can be drilled, thereby reducing the production efficiency of the fan casing. In addition, when the positioning tool used in the current fan casing production is positioned, the threaded structure (such as driving structure such as threaded rod) in the positioning tool is easily loosened due to force, thereby reducing the firmness of the positioning tool when positioning the fan casing, thereby affecting the processing quality of the fan casing. Summary of the invention

[0004] The disclosed embodiment relates to a positioning tool for producing fan casings, which, through the setting of a rotary feeding mechanism, can rotate four expansion-type positioning mechanisms and four fan casings clockwise, and each rotation is ninety degrees, so that the working positions of the four expansion-type positioning mechanisms and the four fan casings are switched. When the fan casing with holes drilled is rotated to the front, a fan casing with holes drilled in the front can be removed and replaced while a fan casing at the rear is being drilled, thereby greatly shortening the waiting time and improving the production efficiency of the fan casing.

[0005] According to a first aspect of the present disclosure, there is provided a positioning tool for producing a fan casing, specifically comprising: a machine tool; a drilling device is installed on the rear side of the upper end surface of the machine tool, and a controller is installed on the right side of the upper end surface of the machine tool; a rotary feeding mechanism is installed on the machine tool, and four expansion-type positioning mechanisms are installed in a circular array on the upper part of the rotary feeding mechanism, and a fan casing is expanded on the outside of each expansion-type positioning mechanism; four locking mechanisms are provided in a circular array on the rotary feeding mechanism; a horizontal support plate is installed on both sides of the left and right sides of the upper end surface of the machine tool, and a reinforcement mechanism is installed on the upper end surface of each horizontal support plate.

[0006] In at least some embodiments, six supporting rollers are installed on the front side of the upper end surface of the machine tool, and the six supporting rollers are distributed in a circular array on the upper end surface of the machine tool.

[0007] In at least some embodiments, the rotary feeding mechanism includes a rotating disk, a vertical rotating shaft, a driving motor, a worm, a worm wheel, a locking block and a locking slot; a vertical rotating shaft that penetrates the machine tool is fixedly connected to the center of the bottom end surface of the rotating disk, and the vertical rotating shaft is rotatably connected to the machine tool; a worm wheel is fixedly installed at the lower end of the vertical rotating shaft; the driving motor is fixedly installed on the bottom end surface of the machine tool, and a worm is connected to the rotating shaft of the driving motor through a coupling, the worm is rotatably connected to the bottom end surface of the machine tool, and the worm is meshed with the worm wheel, and the transmission ratio of the worm and the worm wheel is forty to one; four locking blocks are fixedly connected to the outer peripheral surface of the rotating disk in a circular array, and two locking slots are provided on the outer side of each locking block.

[0008] In at least some embodiments, the expansion-type positioning mechanism includes a fixed base, a rotating cylinder, a rotating screw, a locking gear, a hexagonal nut, a first expansion rod, a connecting block, an arc-shaped expansion plate, a second expansion rod, a rotating hand wheel and a hexagonal rotating block. The fixed base is fixedly installed at the edge of the upper end surface of the rotating disk, and a rotating cylinder is fixedly connected to the middle of the upper end surface of the fixed base, and a rotating screw that passes through the fixed base and the rotating disk is rotatably connected inside the rotating cylinder; a locking gear is fixedly installed at the lower end of the rotating screw, and a rotating hand wheel is provided at the upper end of the rotating screw, and the middle of the upper end surface of the rotating hand wheel A hexagonal rotating block is provided at the center; the outside of the rotating screw is connected to a hexagonal nut through a thread, and the outside of the hexagonal nut is rotatably connected to six groups of first expansion rods in a circular array, and the number of first expansion rods in each group is two, and the outer end of each group of first expansion rods is rotatably connected to a connecting block, and an arc-shaped expansion plate is provided on the outside of each connecting block; four second expansion rods are rotatably connected to each connecting block through a rotating shaft, and the second expansion rods are rotatably connected to the outside of the rotating cylinder through a rotating shaft; the rotation direction of the first expansion rod and the second expansion rod are both up and down directions.

[0009] In at least some embodiments, when the rotating screw is in a clockwise rotating state, the hexagonal nut moves linearly downward, and the hexagonal nut is in an outwardly expanded state with the first expansion rod and the second expansion rod.

[0010] The locking mechanism comprises a rectangular sliding shell, a sliding block, a pulling rod, a rotating handle, a tightening block, a limiting cylinder, a limiting block, a rectangular through-hole, a rectangular limiting block and a guide groove, wherein the rectangular sliding shell is fixedly mounted at the edge of the bottom end surface of the rotating disk, and the sliding block is slidably connected inside the rectangular sliding shell, the head end of the sliding block passes through the head of the rectangular sliding shell, and the head end of the sliding block is provided with two tightening blocks; the tail end of the sliding block is provided with a pulling rod passing through the tail of the rectangular sliding shell, and the outside of the pulling rod is located inside the rectangular sliding shell and is provided with a spring, and the tail end of the pulling rod is rotatably connected to the rotating handle; the tail of the rectangular sliding shell is provided with a limiting cylinder, and the tail of the limiting cylinder is provided with two guide grooves in a ring array, and the tail end of the limiting cylinder is fixedly connected with two limiting blocks; the upper and lower end surfaces of the rectangular sliding shell are provided with rectangular through-holes, the upper and lower end surfaces of the sliding block are provided with a rectangular limiting block, and the two rectangular limiting blocks respectively pass through the two rectangular through-holes.

[0011] In at least some embodiments, when the locking mechanism is in a locking limit state, the pressing block is in close contact with the outer peripheral surface of the locking gear.

[0012] In at least some embodiments, the reinforcement mechanism includes an electric cylinder, a push plate, a reinforcement plug, a guide rod and a guide sleeve. The electric cylinder is fixedly mounted on the outer side of the upper end surface of the horizontal support plate, and the telescopic rod of the electric cylinder is fixedly connected to the push plate; two reinforcement plugs are provided on the other side of the push plate, and two guide rods are fixedly connected to the outer side of the push plate, each guide rod is slidably connected to the outside of a guide sleeve, and the two guide sleeves are fixedly connected to the outside of the electric cylinder.

[0013] In at least some embodiments, when the two reinforcement mechanisms are in the reinforcement state, the four reinforcement plug blocks are respectively plugged into the locking slots provided on the left and right locking blocks.

[0014] The present invention provides a positioning tool for producing a fan housing, which has the following beneficial effects: By setting up the rotary feeding mechanism, the four expanding positioning mechanisms and the four fan casings can be rotated clockwise, and each time they rotate ninety degrees, the working positions of the four expanding positioning mechanisms and the four fan casings are switched. When the fan casing with holes drilled is rotated to the front, the fan casing with holes drilled in the front can be removed and replaced while the fan casing at the rear is being drilled, thereby greatly shortening the waiting time and improving the production efficiency of the fan casing.

[0015] Through the cooperation of the locking gear and the locking mechanism, after the fan casing is fixed, the rotating handle can be rotated ninety degrees clockwise, so that the sliding block moves toward the head end with the tightening block under the action of the spring force outside the pull rod, so that the tightening block is in close contact with the outer peripheral surface of the locking gear, so that the locking gear is effectively locked and limited, and then in the production process of the fan casing, the rotating screw will not loosen, thereby improving the firmness of the positioning tool when positioning the fan casing and avoiding affecting the processing quality of the fan casing.

[0016] Through the cooperation of the locking block, the locking slot and the two reinforcement mechanisms, after the rotating disk rotates, the telescopic rods of the two electric cylinders can be controlled to extend, thereby moving the two push plates and the four reinforcement blocks inward, so that the reinforcement blocks are plugged into the locking slots on the locking block, so that the rotating disk is further locked and limited, thereby improving the stability of the fan casing during drilling work and further improving the processing quality of the fan casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0018] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0019] In the attached picture: Figure 1 A structural diagram showing the overall structure of the present application; Figure 2 A schematic diagram showing the structure of the present application from a bottom perspective is shown; Figure 3 A schematic diagram of the structure of the present application in a split state is shown; Figure 4 The structure diagram of the rotary feeding mechanism and the locking mechanism of the present application is shown; Figure 5 A front view structural diagram of the expansion type positioning mechanism of the present application is shown; Figure 6 A schematic diagram of the structure of the expansion type positioning mechanism of the present application after being disassembled is shown; Figure 7 A schematic diagram of the structure of the expansion-type positioning mechanism of the present application after removing the two front connection blocks and the two arc-shaped expansion plates is shown; Figure 8 A schematic diagram showing the structure of the locking gear and the locking mechanism of the present application is shown; Fig. 9 A schematic diagram of the structure of the locking mechanism of the present application after disassembly is shown; Fig.10A structural schematic diagram of the reinforcement mechanism of the present application is shown.

[0020] Reference numerals list 1. machine tool; 101. controller; 102. horizontal support plate; 103. support roller; 2. Drilling device; 3. Rotary feeding mechanism; 301. Rotating disk; 302. Vertical rotating shaft; 303. Driving motor; 304. Worm; 305. Worm wheel; 306. Locking block; 307. Locking slot; 4. Expanding and supporting positioning mechanism; 401. Fixed base; 402. Rotating cylinder; 403. Rotating screw; 404. Locking gear; 405. Hexagonal nut; 406. First expanding and supporting rod; 407. Connecting block; 408. Arc-shaped expanding and supporting plate; 409. Second expanding and supporting rod; 4010. Rotating hand wheel; 4011. Hexagonal rotating block; 5. Fan housing; 6. Locking mechanism; 601. Rectangular sliding shell; 602. Sliding block; 603. Pull rod; 604. Turn handle; 605. Tightening block; 606. Limiting cylinder; 607. Limiting block; 608. Rectangular opening; 609. Rectangular limiting block; 6010. Guide groove; 7. Reinforcement mechanism; 701. Electric cylinder; 702. Push plate; 703. Reinforcement plug; 704. Guide rod; 705. Guide sleeve. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment 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.

[0022] Example 1: Please refer to Figures 1 to 10 : The present invention proposes a positioning tool for fan casing production, comprising: a machine tool 1; a drilling device 2 is installed on the rear side of the upper end surface of the machine tool 1, and a controller 101 is installed on the right side of the upper end surface of the machine tool 1; a rotary feeding mechanism 3 is installed on the machine tool 1, and four expansion-type positioning mechanisms 4 are installed in a circular array on the upper part of the rotary feeding mechanism 3, and each expansion-type positioning mechanism 4 has a fan casing 5 expanded on the outside; four locking mechanisms 6 are provided in a circular array on the rotary feeding mechanism 3; a horizontal support plate 102 is installed on the left and right sides of the upper end surface of the machine tool 1, and a reinforcement mechanism 7 is installed on the upper end surface of each horizontal support plate 102; six support rollers 103 are installed on the front side of the upper end surface of the machine tool 1, and the six support rollers 103 are distributed in a circular array on the upper end surface of the machine tool 1, and are used to be rollingly connected with the bottom end surface of the rotating disk 301 to improve the stability of the rotating disk 301 during rotation.

[0023] The rotary feeding mechanism 3 includes a rotating disk 301, a vertical rotating shaft 302, a driving motor 303, a worm 304, a worm wheel 305, a locking block 306 and a locking slot 307. The central part of the bottom end surface of the rotating disk 301 is fixedly connected with the vertical rotating shaft 302 that penetrates the machine tool 1, and the vertical rotating shaft 302 is rotatably connected to the machine tool 1; the lower end of the vertical rotating shaft 302 is fixedly installed with a worm wheel 305; the driving motor 303 is fixedly installed on the bottom end surface of the machine tool 1, and the rotating shaft of the driving motor 303 is connected with the worm 304 through a coupling, and the worm 305 is connected to the worm 304 through a coupling. 04 is rotatably connected to the bottom end surface of the machine tool 1, and the worm 304 is meshed with the worm wheel 305, and the transmission ratio of the worm 304 and the worm wheel 305 is forty to one; the outer peripheral surface of the rotating disk 301 is fixedly connected with four locking blocks 306 in a ring array, and each locking block 306 has two locking slots 307 on the outer side; the single rotation number of the driving motor 303 is ten circles; through the setting of the rotary feeding mechanism 3, it is used to drive the four expansion-type positioning mechanisms 4 and the four fan housings 5 ​​to rotate clockwise, and each rotation is ninety degrees.

[0024] The expansion-type positioning mechanism 4 includes a fixed base 401, a rotating cylinder 402, a rotating screw 403, a locking gear 404, a hexagonal nut 405, a first expansion rod 406, a connecting block 407, an arc expansion plate 408, a second expansion rod 409, a rotating hand wheel 4010 and a hexagonal rotating block 4011. The fixed base 401 is fixedly installed at the edge of the upper end surface of the rotating disk 301, and the middle part of the upper end surface of the fixed base 401 is fixedly connected with the rotating cylinder 402, and the rotating cylinder 402 is internally rotatably connected with the rotating screw 403 that passes through the fixed base 401 and the rotating disk 301; the locking gear 404 is fixedly installed at the lower end of the rotating screw 403, and the upper end of the rotating screw 403 is provided with a rotating hand wheel 4010, and the central part of the upper end surface of the rotating hand wheel 4010 is provided with a hexagonal rotating block 4011; the outer part of the rotating screw 403 is connected with the hexagonal nut 405 by thread, and The outside of the hexagonal nut 405 is rotatably connected to six groups of first expansion rods 406 in a circular array, and the number of first expansion rods 406 in each group is two, and the outer end of each group of first expansion rods 406 is rotatably connected to a connecting block 407, and an arc-shaped expansion plate 408 is provided on the outside of each connecting block 407; four second expansion rods 409 are rotatably connected to each connecting block 407 through a rotating shaft, and the second expansion rods 409 are rotatably connected to the outside of the rotating cylinder 402 through a rotating shaft; the rotation direction of the first expansion rod 406 and the second expansion rod 409 is both up and down; when the rotating screw 403 is in a clockwise rotation state, the hexagonal nut 405 moves linearly downward, and the hexagonal nut 405 is in an outward expansion state with the first expansion rod 406 and the second expansion rod 409; through the setting of the expansion positioning mechanism 4, it is used to expand and position the fan casing 5.

[0025] The locking mechanism 6 includes a rectangular sliding shell 601, a sliding block 602, a pulling rod 603, a rotating handle 604, a tightening block 605, a limiting cylinder 606, a limiting block 607, a rectangular opening 608, a rectangular limiting block 609 and a guide groove 6010. The rectangular sliding shell 601 is fixedly installed at the edge of the bottom end surface of the rotating disk 301, and the sliding block 602 is slidably connected inside the rectangular sliding shell 601. The head end of the sliding block 602 passes through the head of the rectangular sliding shell 601, and two tightening blocks 605 are provided at the head end of the sliding block 602; the tail end of the sliding block 602 is provided with a pulling rod 603 that passes through the tail of the rectangular sliding shell 601, and the outside of the pulling rod 603 is located inside the rectangular sliding shell 601 and is provided with a spring, and the tail end of the pulling rod 603 is rotatably connected to the rotating handle 60 4; A limiting cylinder 606 is provided at the tail of the rectangular sliding shell 601, and two guide grooves 6010 are provided at the tail of the limiting cylinder 606 in a ring array shape, and two limiting blocks 607 are fixedly connected to the tail end of the limiting cylinder 606; rectangular openings 608 are provided on the upper and lower end surfaces of the rectangular sliding shell 601, and a rectangular limiting block 609 is provided on the upper and lower end surfaces of the sliding block 602, and the two rectangular limiting blocks 609 pass through the two rectangular openings 608 respectively; when the locking mechanism 6 is in the locking limiting state, the tightening block 605 is in close contact with the outer peripheral surface of the locking gear 404; through the cooperation between the locking gear 404 and the locking mechanism 6, the loosening of the rotating screw 403 can be avoided, thereby improving the firmness of the positioning tool when positioning the fan housing 5.

[0026] Embodiment 2, based on embodiment 1, as Figure 1 and Fig.10 As shown, the reinforcement mechanism 7 includes an electric cylinder 701, a push plate 702, a reinforcement plug 703, a guide rod 704 and a guide sleeve 705. The electric cylinder 701 is fixedly mounted on the outer side of the upper end surface of the horizontal support plate 102, and the telescopic rod of the electric cylinder 701 is fixedly connected to the push plate 702; two reinforcement plugs 703 are provided on the other side of the push plate 702, and two guide rods 704 are fixedly connected to the outer side of the push plate 702, and each guide rod 704 is slidably connected to a guide sleeve 705, and the two guide rods 704 are fixedly connected to the outer side of the push plate 702. The sliding sleeve 705 is fixedly connected to the outside of the electric cylinder 701; when the two reinforcement mechanisms 7 are in the reinforcement state, the four reinforcement plugs 703 are respectively plugged into the locking slots 307 opened on the left and right locking blocks 306; the electric cylinder 701 and the drive motor 303 are electrically connected to the controller 101; through the cooperation of the locking blocks 306, the locking slots 307 and the two reinforcement mechanisms 7, the rotating disk 301 can be further locked and limited, thereby improving the stability of the fan housing 5 during drilling.

[0027] The working principle of this embodiment is as follows: when in use, firstly, the four fan housings 5 ​​are put onto the outside of the four expansion-type positioning mechanisms 4, and then the rotating handles 604 in the four locking mechanisms 6 are rotated counterclockwise by ninety degrees in turn, so that the rotating handles 604 automatically slide to the tail end of the limiting cylinder 606 under the action of the internal inclined surface of the guide groove 6010, and the rotating handles 604 are limited by the tail end of the limiting cylinder 606. When the rotating handles 604 slide to the tail end of the limiting cylinder 606, the rotating handles 604 will pull the pulling rod 603, the sliding block 602 and the tightening block 605 to move toward the tail end, so that the tightening block 605 is separated from the outer circumference of the locking gear 404, and then the rotating hand wheels 4010 in the four expansion-type positioning mechanisms 4 are manually rotated clockwise in sequence, thereby driving the four rotating screws 403 to rotate in sequence, and then the hexagonal nut 405 moves linearly downward under the action of the thread, and then the hexagonal nut 405 drives the first expansion rod 406 and the second expansion rod 409 to expand outward, thereby driving the six connecting blocks 407 and the six arc expansion plates 408 to expand outward, so that the outer arc surfaces of the six arc expansion plates 408 are in close contact with the inner circumference of the fan housing 5, thereby fixing the fan housing 5; After the fan casing 5 is fixed, the rotating handle 604 is rotated ninety degrees clockwise, so that the sliding block 602 moves toward the head end with the tightening block 605 under the action of the external spring force of the pulling rod 603, so that the tightening block 605 is in close contact with the outer peripheral surface of the locking gear 404, so that the locking gear 404 is effectively locked and limited, and the rotating screw 403 will not be loosened during the production process of the fan casing 5.

[0028] Then, a hole is drilled in a rear fan housing 5 by the drilling device 2. After the hole is drilled in the rear fan housing 5, the telescopic rods of the two electric cylinders 701 are retracted by the controller 101, thereby moving the two push plates 702 and the four reinforcement plugs 703 outward, so that the reinforcement plugs 703 are separated from the locking slots 307 provided on the locking blocks 306. Then, the driving motor 303 is started by the controller 101. Since the driving motor 303 rotates ten times in a single rotation and the worm 304 and the worm wheel 305 rotate ten times in a single rotation, the worm 304 and the worm wheel 305 rotate ten times in a single rotation. The transmission ratio is 40 to 1, so when the shaft of the driving motor 303 rotates the worm 304 ten times, the worm wheel 305 will rotate a quarter of a turn clockwise, that is, ninety degrees, so that the vertical shaft 302 rotates the rotating disk 301 ninety degrees clockwise, thereby causing the four expansion-type positioning mechanisms 4 and the four fan housings 5 ​​to rotate ninety degrees clockwise, so that the positions of the four fan housings 5 ​​are switched; then the telescopic rods of the two electric cylinders 701 are controlled to extend, thereby causing the two push plates 702 and the four reinforcement plugs 703 to move inward. The reinforcing plug block 703 is moved to engage with the locking slot 307 provided on the locking block 306, so that the rotating disk 301 is further locked and limited; then the drilling device 2 is used to drill a hole in the fan housing 5 at the rear of the current one; after the second fan housing 5 is drilled, the driving motor 303 is started again, and the rotating disk 301 is rotated 90 degrees clockwise again, thereby causing the four expansion-type positioning mechanisms 4 and the four fan housings 5 ​​to continue to rotate 90 degrees clockwise, and at this time, the drilling device 2 can be used to drill a hole in the fan housing 5 at the rear of the current one A fan casing 5 is drilled, and at this time, the front rotating screw 403 can be directly rotated counterclockwise manually to make the front hexagonal nut 405 rotate upward with the corresponding upper end of the first expansion rod 406, so that the six connecting blocks 407 and the six arc-shaped expansion plates 408 are moved inward, so that the front fan casing 5 loses its positioning function, and then a fan casing 5 without holes can be replaced, so that the other fan casing 5 without holes can be positioned in advance during the drilling of one fan casing 5.

[0029] In this article, there are a few points to note: 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0030] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0031] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A positioning tool for producing a fan housing, comprising: A machine tool (1); a drilling device (2) is installed on the rear side of the upper end surface of the machine tool (1), and a controller (101) is installed on the right side of the upper end surface of the machine tool (1); it is characterized in that a rotary feeding mechanism (3) is installed on the machine tool (1), and four expansion-type positioning mechanisms (4) are installed in a circular array on the upper part of the rotary feeding mechanism (3), and each expansion-type positioning mechanism (4) is expanded with a fan casing (5) on the outside; four locking mechanisms (6) are provided in a circular array on the rotary feeding mechanism (3); a horizontal support plate (102) is installed on both left and right sides of the upper end surface of the machine tool (1), and a reinforcement mechanism (7) is installed on the upper end surface of each horizontal support plate (102).

2. The positioning tool for fan casing production according to claim 1 is characterized in that: Six supporting rollers (103) are installed on the front side of the upper end surface of the machine tool (1), and the six supporting rollers (103) are distributed in a ring array on the upper end surface of the machine tool (1).

3. The positioning tool for fan casing production according to claim 1, characterized in that: The rotary feeding mechanism (3) comprises a rotating disk (301), a vertical rotating shaft (302), a driving motor (303), a worm (304), a worm wheel (305), a locking block (306) and a locking slot (307); a vertical rotating shaft (302) penetrating the machine tool (1) is fixedly connected to the center of the bottom end surface of the rotating disk (301), and the vertical rotating shaft (302) is rotatably connected to the machine tool (1); a worm wheel (305) is fixedly mounted at the lower end of the vertical rotating shaft (302); the driving motor (303) The rotating disk (301) is fixedly mounted on the bottom end surface of the machine tool (1), and a worm (304) is connected to the rotating shaft of the driving motor (303) via a coupling, the worm (304) is rotatably connected to the bottom end surface of the machine tool (1), and the worm (304) is meshed with a worm wheel (305), and the transmission ratio of the worm (304) to the worm wheel (305) is forty to one; the outer peripheral surface of the rotating disk (301) is fixedly connected to four locking blocks (306) in an annular array, and each locking block (306) is provided with two locking slots (307) on its outer side surface.

4. The positioning tool for producing a fan housing according to claim 3 is characterized in that: The expansion type positioning mechanism (4) comprises a fixed base (401), a rotating cylinder (402), a rotating screw (403), a locking gear (404), a hexagonal nut (405), a first expansion rod (406), a connecting block (407), an arc expansion plate (408), a second expansion rod (409), a rotating hand wheel (4010) and a hexagonal rotating block (4011), wherein the fixed base (401) is fixedly mounted on the edge of the upper end surface of the rotating disk (301), and the middle part of the upper end surface of the fixed base (401) is fixedly connected to the rotating cylinder (402), and the rotating screw (403) that passes through the fixed base (401) and the rotating disk (301) is rotatably connected inside the rotating cylinder (402); the locking gear (404) is fixedly mounted on the lower end of the rotating screw (403), and the rotating hand wheel (4010) is provided on the upper end of the rotating screw (403). ), and a hexagonal rotating block (4011) is provided at the center of the upper end surface of the rotating hand wheel (4010); the rotating screw rod (403) is externally connected to a hexagonal nut (405) through a thread, and the hexagonal nut (405) is externally rotatably connected to six groups of first expansion rods (406) in a circular array, and each group of first expansion rods (406) has two in number, and the outer end of each group of first expansion rods (406) is rotatably connected to a connecting block (407), and an arc-shaped expansion plate (408) is provided on the outer side of each connecting block (407); each of the connecting blocks (407) is rotatably connected to four second expansion rods (409) through a rotating shaft, and the second expansion rods (409) are rotatably connected to the outside of the rotating cylinder (402) through the rotating shaft; the first expansion rods (406) and the second expansion rods (409) are both rotated in the up-down direction.

5. The positioning tool for producing a fan housing according to claim 4, characterized in that: When the rotating screw rod (403) is in a clockwise rotating state, the hexagonal nut (405) moves linearly downward, and the hexagonal nut (405) is in an outwardly expanding state with the first expansion rod (406) and the second expansion rod (409).

6. The positioning tool for producing a fan housing according to claim 4, characterized in that: The locking mechanism (6) comprises a rectangular sliding shell (601), a sliding block (602), a pulling rod (603), a rotating handle (604), a tightening block (605), a limiting cylinder (606), a limiting block (607), a rectangular opening (608), a rectangular limiting block (609) and a guide groove (6010); the rectangular sliding shell (601) is fixedly mounted at the edge of the bottom end surface of the rotating disk (301), and the sliding block (602) is slidably connected inside the rectangular sliding shell (601); the head end of the sliding block (602) passes through the head of the rectangular sliding shell (601), and two tightening blocks (605) are provided at the head end of the sliding block (602); the tail end of the sliding block (602) is provided with a fixing block (605) that passes through the tail of the rectangular sliding shell (601). A pulling rod (603) is provided, and the outside of the pulling rod (603) is located inside a rectangular sliding shell (601) and is provided with a spring, and the rear end of the pulling rod (603) is rotatably connected to a rotating handle (604); a limiting cylinder (606) is provided at the rear end of the rectangular sliding shell (601), and the rear end of the limiting cylinder (606) is provided with two guide grooves (6010) in a ring array, and the rear end of the limiting cylinder (606) is fixedly connected with two limiting blocks (607); the upper and lower end surfaces of the rectangular sliding shell (601) are both provided with rectangular openings (608), and the upper and lower end surfaces of the sliding block (602) are both provided with a rectangular limiting block (609), and the two rectangular limiting blocks (609) respectively pass through the two rectangular openings (608).

7. The positioning tool for producing a fan housing according to claim 6, characterized in that: When the locking mechanism (6) is in a locked limit state, the pressing block (605) is in close contact with the outer peripheral surface of the locking gear (404).

8. The positioning tool for producing a fan housing according to claim 3, characterized in that: The reinforcement mechanism (7) comprises an electric cylinder (701), a push plate (702), a reinforcement plug (703), a guide rod (704) and a guide sleeve (705); the electric cylinder (701) is fixedly mounted on the outer side of the upper end surface of the horizontal support plate (102), and the telescopic rod of the electric cylinder (701) is fixedly connected to the push plate (702); two reinforcement plugs (703) are provided on the other side of the push plate (702), and two guide rods (704) are fixedly connected to the outer side of the push plate (702); each guide rod (704) is slidably connected to a guide sleeve (705) on the outside, and the two guide sleeves (705) are fixedly connected to the outside of the electric cylinder (701).

9. The positioning tool for producing a fan housing according to claim 8, characterized in that: When the two reinforcement mechanisms (7) are in a reinforcement state, the four reinforcement plug blocks (703) are respectively plugged into the locking slots (307) provided on the left and right locking blocks (306).

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