Rotor mold processing method, rotor mold, rotor and rotor pump

Abstract

The present invention discloses a rotor mold processing method, which includes the following steps: S1. Prepare a mold blank with a reference mold hole; S2. Install the mold blank flatly on the machine tool fixture of a four-axis machine tool, and the mold blank is processed by the four-axis machine tool to form a rough mold cavity, the rough mold cavity including the reference mold hole and multiple blade cavities, each blade cavity having a vertical processing surface and a downward inclined processing surface; S3. Install a dividing head device obliquely on the reference surface of the four-axis machine tool, the dividing head device is provided with an obliquely set dividing fixture, and the mold blank is installed on the dividing fixture; S4. The dividing fixture is rotated to a certain angle so that the downward inclined processing surface of a blade cavity is perpendicular to the reference surface, and the four-axis machine tool processes the vertical processing surface of the blade cavity into an upward inclined processing surface; S5. Repeat step S4 until the vertical processing surfaces of all blade cavities are processed into upward inclined processing surfaces. This method can process a rotor mold that meets the design requirements without using a five-axis machine tool, which is beneficial to reducing the cost of the rotor pump.

Description

Technical Field

[0001] The present invention relates to the technical field of positive displacement pumps, and in particular to a rotor mold processing method, a rotor mold, a rotor, and a rotor pump. Background Art

[0002] A rotary pump is a type of positive displacement pump consisting of a rotating rotor and a stationary pump body. The two rotors are driven by a pair of synchronous gears, enabling them to rotate synchronously in opposite directions. The transmission section between the rotors utilizes an interference fit or overfit to prevent the medium from leaking into the pump body. The relative motion between the rotors and the pump body changes the working volume, and the rotating rotors squeeze the material, while leaving a space on the other side to create a low pressure, allowing the material to be continuously drawn in, thus achieving continuous conveyance of the medium.

[0003] Although the internal structure of the rotor pump is simple, the structure of the rotor is actually very complex. It is extremely difficult to ensure that the two rotors are over-matched during operation. If there is an error, it will cause seizure. Therefore, it is necessary to wrap the outer layer of the metal skeleton of the rotor with soft tissue material, such as rubber, or directly use a rubber rotor, and use the elasticity of the rubber to compensate for the shape error.

[0004] At present, the production of rotors mainly depends on rotor molds, and the quality of rotor molds directly determines the quality of the rotor. Figure 1 As shown in the figure, these are the front and back sides of the rotor mold. Due to its complex structure, rotor molds are currently primarily machined using five-axis machining to meet design requirements. This overcomes the interference between the tool and the mold that occurs with four-axis machining. However, five-axis machines are expensive, making them unaffordable for most machining companies. Consequently, rotor mold production must be outsourced, hindering the development of these companies. Summary of the Invention

[0005] The present invention aims to provide a rotor mold processing method to solve one or more technical problems existing in the prior art and at least provide a beneficial option or create conditions.

[0006] According to a first embodiment of the present invention, a rotor mold processing method includes the following steps:

[0007] S10. Preparing a mold having a processing plane and a bottom surface, the mold having or being processed with reference die holes connected to the processing plane and the bottom surface respectively;

[0008] S20. Mounting the mold blank on a machine tool fixture of a four-axis machine tool so that the machining plane is parallel to the reference plane of the four-axis machine tool. The mold blank is machined by the four-axis machine tool to form a rough mold cavity, wherein the rough mold cavity includes the reference mold hole and a plurality of blade cavities, each of the blade cavities having a vertical machining surface and a downwardly inclined machining surface, wherein the vertical machining surface is perpendicular to the reference plane, and the size of the downwardly inclined machining surface decreases from the machining plane toward the bottom surface;

[0009] S30. A dividing head device is installed tilted on the reference surface of the four-axis machine tool, the dividing head device is provided with an indexing fixture set tilted, the mold is mounted on the indexing fixture;

[0010] S40. The indexing fixture is rotated by a certain angle so that the lower inclined processing surface of one of the blade cavities is perpendicular to the reference plane, and the four-axis machine tool processes the vertical processing surface of the blade cavity into an upper inclined processing surface, the size of which increases from the processing plane toward the bottom surface;

[0011] S50. Repeat step S40 until the vertical processing surfaces of all blade cavities are processed into the upward inclined processing surfaces.

[0012] The rotor mold processing method according to the embodiment of the present invention has at least the following beneficial effects: compared with the existing technology, this method can process a rotor mold that meets the design requirements without using a five-axis machine tool. Since the four-axis machine tool is a general-purpose machine tool, it is inexpensive and the operators are easy to train. Therefore, general processing companies can produce rotor molds on their own, which is beneficial to reducing the manufacturing and maintenance costs of the rotor pump.

[0013] According to some embodiments of the present invention, the rotor mold processing method further includes step S11, which is placed before step S20, and step S11 includes: fixing the bottom surface of the mold blank to the clamping plate, and aligning the central axis of the mold blank and the clamping plate.

[0014] According to some embodiments of the present invention, step S11 further includes: a convex ring is provided on the bottom surface of the mold blank, and the clamping plate is provided with a groove that matches the convex ring, so that a tool backing groove is formed between the mold blank and the clamping plate.

[0015] According to some embodiments of the present invention, fixing the bottom surface of the mold blank to the chuck plate includes:

[0016] The mold base and the clamping plate are fixedly connected by welding, screwing or gluing.

[0017] According to some embodiments of the present invention, the mold blank is machined by the four-axis machine tool to form a rough mold cavity, comprising: the four-axis machine tool processes the mold blank layer by layer from the machining plane of the mold blank to the bottom surface of the mold blank.

[0018] According to some embodiments of the present invention, the four-axis machine tool processes the mold blank layer by layer from the processing plane to the bottom surface of the mold blank, including: the four-axis machine tool processes the blade cavities one by one.

[0019] According to some embodiments of the present invention, the four-axis machine tool processes the mold blank layer by layer from the processing plane to the bottom surface of the mold blank, including: the four-axis machine tool processes along all blade cavities.

[0020] According to the rotor mold of the second embodiment of the present invention, the rotor mold is manufactured by the above-mentioned rotor mold processing method.

[0021] According to the rotor of the third embodiment of the present invention, the rotor is manufactured by the above-mentioned rotor mold.

[0022] According to the rotor pump of the fourth embodiment of the present invention, the rotor pump includes a pump body and the two above-mentioned rotors, the two rotors have different rotation directions, the pump body is provided with a volume cavity and a feed port and a discharge port respectively connected to the volume cavity, and the two rotors are rotatably connected in the volume cavity.

[0023] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0025] Figure 1 1 is a schematic structural diagram of a rotor mold provided by an embodiment of the present invention;

[0026] Figure 2 is a cross-sectional view of the mold base and the chuck provided in an embodiment of the present invention when connected;

[0027] Figure 3 1 is a schematic structural diagram of the mold provided by an embodiment of the present invention when processing the first leaf cavity;

[0028] Figure 4 1 is a schematic structural diagram of a mold blank after a rough mold cavity is machined, provided by an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the three-dimensional structure of the mold blank and the dividing head device provided by an embodiment of the present invention when they are connected;

[0030] Figure 6 yes Figure 5 a side view of the structure shown;

[0031] Figure 7 yes Figure 5 a top view of the structure shown;

[0032] Figure 8 yes Figure 5 A perspective exploded view of the structure shown;

[0033] Figure 9 1 is a schematic flow chart of a rotor mold processing method provided by an embodiment of the present invention;

[0034] Figure 10 1 is a schematic diagram of the three-dimensional structure of a rotor pump provided by an embodiment of the present invention;

[0035] Figure 11 It is a schematic diagram of the internal structure of the rotor pump provided by an embodiment of the present invention.

[0036] In the accompanying drawings: 110-machining plane, 120-bottom surface, 100-mold blank, 310-reference mold hole, 200-clamping plate, 121-convex ring, 210-groove, 101-knife back groove, 300-rough mold cavity, 320-blade cavity, 321-vertical machining surface, 322-downward inclined machining surface, 400-dividing head device, 500-base, 510-inclined surface, 323-upward inclined machining surface, 600-rotor mold, 700-rotor pump, 710-pump body, 720-rotor, 711-end cover, 712-bearing seat, 713-open box, 701-volume cavity, 702-feed port, 703-discharge port, 721-bearing. DETAILED DESCRIPTION

[0037] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0038] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0039] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0041] like Figure 9 As shown, the rotor mold processing method according to the first embodiment of the present invention includes the following steps:

[0042] S100. Prepare a die blank 100 having a processing plane 110 and a bottom surface 120. The die blank 100 has or is processed with a reference die hole 310 respectively connected to the processing plane 110 and the bottom surface 120. Generally speaking, the die blank 100 is made of steel to improve its durability. The die blank 100 can be a forging. If the reference die hole 310 has been processed during forging, the die blank 100 can be used directly. However, if the reference die hole 310 has not been processed during forging, the die blank 100 needs to be processed with the reference die hole 310 in the subsequent processing. Although the present invention does not limit the shape of the die blank 100, in order to facilitate subsequent flat finishing, the shape of the die blank 100 is preferably cylindrical, and its reference die hole 310 is a central circular hole. The reason why the processing plane 110 and the bottom surface 120 of the mold blank 100 need to be defined is that a processing reference is required in the subsequent processing process, and the processing plane 110 is the processing reference. Therefore, the accuracy of the processing plane 110 needs to be much higher than the accuracy of the bottom surface 120.

[0043] S200. Figure 2 As shown, the bottom surface 120 of the mold base 100 is fixed to the clamping plate 200, and the central axes of the mold base 100 and the clamping plate 200 are aligned. Since the rotor mold 600 does not require clamping during use, the mold base 100 is not designed with relevant clamping parts during manufacturing. Therefore, an external clamping plate 200 is required to facilitate the subsequent installation of the mold base 100. Since the mold base 100 is fixedly connected to the clamping plate 200, when the clamping plate 200 is installed on the processing fixture of the processing equipment, the mold base 100 is also fixed. The mold base 100 and the clamping plate 200 are fixedly connected by methods including but not limited to welding, screwing, or gluing.

[0044] Furthermore, the bottom surface 120 of the mold blank 100 is provided with a convex ring 121, and the chucking plate 200 is provided with a groove 210 that cooperates with the convex ring 121, so that a tool withdrawal groove 101 is formed between the mold blank 100 and the chucking plate 200. The function of the tool withdrawal groove 101 is to prevent the processing tool from colliding with the chucking plate 200 when through-hole cutting, which is beneficial to protecting the processing tool and recycling the chucking plate 200.

[0045] Furthermore, since the initial precision of the mold blank 100 is relatively low, it needs to be sent to processing equipment for dimensional trimming after being fixed to the clamping plate 200 to ensure the accuracy of the processing plane 110 and the fit between the mold blank 100 and the clamping plate 200, such as coaxiality and circular runout, so as to reduce the fit tolerance and improve the subsequent processing quality.

[0046] S300. The chuck 200 connected to the mold base 100 is mounted on the machine tool fixture of a four-axis machine tool (not shown in the drawings). The machine tool fixture is located on the reference plane of the four-axis machine tool so that the processing plane 110 of the mold base 100 is parallel to the reference plane of the four-axis machine tool. The mold base 100 is processed by the four-axis machine tool to form a rough mold cavity 300. Since the processing tool of the four-axis machine tool has only the degrees of freedom of the X-axis, Y-axis, Z-axis, and rotation around the Z-axis, the four-axis machine tool cannot directly process the mold base 100. Figure 1 The rotor mold 600 shown needs to be rough-machined using a four-axis machine tool and then further processed using auxiliary tools.

[0047] Since rotor 720 typically has three blades, rough mold cavity 300 includes three blade cavities 320 in addition to reference mold hole 310. All blade cavities 320 are evenly distributed around the circumference of reference mold hole 310. Each blade cavity 320 has a vertical machining surface 321 and a downwardly inclined machining surface 322. The vertical machining surface 321 is perpendicular to the reference plane, while the dimensions of the downwardly inclined machining surface 322 decrease from machining plane 110 to bottom surface 120. Since both the vertical machining surface 321 and the downwardly inclined machining surface 322 can be machined using a four-axis machine tool, multiple four-axis machine tools can be used to improve the production efficiency of rotor mold 600, eliminating the need for multiple expensive five-axis machine tools.

[0048] Furthermore, the four-axis machine tool processes the mold base 100 layer by layer from the processing plane 110 to the bottom surface 120 of the mold base 100, and controls the processing trajectory of the machining tool at each layer through the program to reduce the amount of cutting each time. In view of this, there are two ways to process the rough mold cavity 300. The first is to use the four-axis machine tool to process the blade cavity 320 one by one, such as Figure 3 and Figure 4As shown, after the four-axis machine tool processes one blade cavity 320, the other blade cavities 320 are processed; another method is that the four-axis machine tool processes along all the blade cavities 320, and the trajectory of the machining tool in each layer passes through the preset positions of all the blade cavities 320, so that all the blade cavities 320 are processed at one time.

[0049] It should be noted that after the rough mold cavity 300 is machined, it is necessary to perform fine machining again using a four-axis machine tool to improve the dimensional accuracy of the rough mold cavity 300. In addition, since the machining of the blade cavity 320 requires the reference mold hole 310 as a reference, the initial size of the reference mold hole 310 should be smaller than the finished product size to reserve sufficient machining allowance.

[0050] S400. Figures 5 to 8 As shown, a mold base 100 with a rough mold cavity 300 is removed. An indexing head assembly 400 is then tilted and mounted on the base surface of a four-axis machine tool. The indexing head assembly 400 includes an inclined indexing fixture, and a chuck 200 connected to the mold base 100 is mounted on the indexing fixture. Because the indexing head assembly 400 is prior art, its structure and operating principle are not described in detail in this disclosure. The indexing head assembly 400 shown in the accompanying drawings is a simplified structure; in practice, the existing indexing head assembly 400 will prevail. The indexing head assembly has a graduated rotary handle, which allows the user to precisely adjust the rotation angle of the indexing fixture, achieving high-precision rotation of the mold base 100.

[0051] like Figure 8 As shown, a base 500 is mounted on the datum surface of the four-axis machine tool. The base 500 has an inclined surface 510. The chassis of the indexing head device 400 is fixedly connected to the inclined surface 510, allowing the indexing head device 400 to be tilted relative to the datum surface of the four-axis machine tool. In addition, the indexing head device 400 itself has an inclined indexing fixture. The tilt direction of the indexing fixture is different from the tilt direction of the inclined surface 510. For example, the inclined surface 510 has an inclination direction from bottom to top to front, while the indexing fixture has an inclination direction from bottom to top to left. Ultimately, the indexing fixture is placed on the datum surface of the four-axis machine tool at a complex inclination angle.

[0052] It should be understood that the inclination angle of the inclined surface 510 and the inclination angle of the indexing fixture must be calculated based on the inclination of the rotor mold 600. The superposition of these two inclination angles ensures that one of the upper inclined machined surfaces 323 is perpendicular to the reference plane. Since different specifications of rotor molds 600 correspond to different inclination angles, the present invention does not limit the inclination angles of the inclined surface 510 and the indexing fixture. Regardless of their respective values, as long as they have different inclination directions, they fall within the scope of protection of the present invention.

[0053] S500. Control the indexing fixture to rotate a certain angle by rotating the handle so that the lower inclined processing surface 322 of one of the blade cavities 320 is perpendicular to the reference plane, and the four-axis machine tool processes the vertical processing surface 321 of the blade cavity 320 into an upper inclined processing surface 323. When the lower inclined processing surface 322 is perpendicular to the reference plane, the corresponding vertical processing surface 321 will be tilted to expose the area to be processed. Although the processing tool of the four-axis machine tool only has the degrees of freedom of rotation of the X-axis, Y-axis, Z-axis, and around the Z-axis, as long as the lower inclined processing surface 322 is perpendicular to the reference plane, the four-axis machine tool can process the exposed processing area vertically, thereby processing the vertical processing surface 321 of a blade cavity 320 into an upper inclined processing surface 323. At this time, the size of the upper inclined processing surface 323 increases from the processing plane 110 to the bottom surface 120.

[0054] It should be noted that after completing the processing of a blade cavity 320 , it is necessary to use a four-axis machine tool again for fine processing to improve the dimensional accuracy of the blade cavity 320 .

[0055] S600. Repeat step S500 until the vertical processing surfaces 321 of all blade cavities 320 are processed into upward inclined processing surfaces 323. When all blade cavities 320 have downward inclined processing surfaces 322 and upward inclined processing surfaces 323 at the same time, the mold base 100 has the following characteristics: Figure 1 The mold cavity structure shown is formed into a rotor mold 600.

[0056] S700. Separate the completed rotor mold 600 from the chuck plate 200. After the rotor mold 600 is processed, it needs to be separated from the chuck plate 200. If the mold base 100 and the chuck plate 200 are fixedly connected by screws, simply loosen the corresponding fixing screws. If the mold base 100 and the chuck plate 200 are fixedly connected by welding, use a slitting device to cut the two. If the mold base 100 and the chuck plate 200 are fixedly connected by glue, use a special solvent to remove the glue between the two.

[0057] Compared with the existing technology, this method can process a rotor mold 600 that meets the design requirements without using a five-axis machine tool. Since a four-axis machine tool is a general-purpose machine tool, it is inexpensive and operators are easy to train. Therefore, general processing companies can produce the rotor mold 600 by themselves, which is beneficial to reducing the manufacturing and maintenance costs of the rotor pump 700.

[0058] The rotor mold 600 according to the second embodiment of the present invention is manufactured using the aforementioned rotor mold processing method. Because the rotor mold 600 does not require a five-axis machine tool for processing, it offers significant cost advantages. Conventional manufacturing companies can independently produce multiple sets of rotor molds 600, thereby enhancing their market competitiveness.

[0059] The rotor 720 according to the third embodiment of the present invention is manufactured using the rotor mold 600. Since the manufacturing cost of the rotor mold 600 is significantly reduced, the production cost of the rotor 720 is also reduced, which is conducive to the promotion of the rotor pump 700.

[0060] like Figure 10 and Figure 11 As shown, a rotor pump 700 according to an embodiment of the fourth aspect of the present invention includes a pump body 710 and two rotors 720 as described above. The pump body 710 is composed of an end cover 711, a bearing seat 712, and an open box 713. The end cover 711, the bearing seat 712, and the open box 713 are connected in sequence. The bearing seat 712 and the open box 713 together form a volume chamber 701. The two sides of the open box 713 are respectively provided with an inlet 702 and an outlet 703 connected to the volume chamber 701. The transmission shaft of each rotor 720 is rotatably connected to the bearing seat 712 at one end through a bearing 721, and is rotatably connected to the open box 713 at the other end through a bearing 721. The two rotors 720 have different rotation directions, and the two need to be manufactured by different rotor molds 600. In addition to having different rotation directions, the two sets of rotor molds 600 have the same other structural and dimensional parameters.

[0061] The bearing housing 712 has a gear slot on its side near the end cap 711. The gear slot is equipped with two intermeshing gears. The drive shaft of each rotor 720 passes through the bearing housing 712 and is connected to the corresponding gear. One of the drive shafts extends outside the end cap 711 and is rigidly connected to the power source. In this embodiment, the power source can be a motor. When the power source drives the drive shaft connected to it to rotate, the two drive shafts rotate synchronously in opposite directions under the action of the gear pair. At this time, the two rotors 720 also rotate synchronously in opposite directions. The working volume is changed by the relative movement between the rotors 720 and the pump body 710. The extrusion effect of the rotors 720 during rotation discharges the material from the discharge port 703. At the same time, a space is left on the other side to form a low pressure, allowing the material to be continuously sucked in from the feed port 702, thereby achieving continuous conveyance of the medium.

[0062] Since the rotor pump 700 uses a lower-cost rotor 720, its selling price can be significantly reduced, which is beneficial to improving the company's profit margin, thereby achieving a win-win situation for the company and the user.

[0063] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the scope of the present invention.

Claims

1. A rotor mold processing method, characterized in that: The following steps are involved: S10. Preparing a mold blank (100) having a processing plane (110) and a bottom surface (120), wherein the mold blank (100) has or is processed with a reference mold hole (310) respectively connected to the processing plane (110) and the bottom surface (120); S20. The mold blank (100) is mounted on a machine tool fixture of a four-axis machine tool so that the processing plane (110) is parallel to the reference plane of the four-axis machine tool. The mold blank (100) is processed by the four-axis machine tool to form a rough mold cavity (300), wherein the rough mold cavity (300) includes the reference mold hole (310) and a plurality of blade cavities (320), each of the blade cavities (320) having a vertical processing surface (321) and a downwardly inclined processing surface (322), wherein the vertical processing surface (321) is perpendicular to the reference plane, and the size of the downwardly inclined processing surface (322) decreases from the processing plane (110) toward the bottom surface (120); S30. A dividing head device (400) is installed obliquely on the reference surface of the four-axis machine tool, the dividing head device (400) is provided with an obliquely arranged dividing fixture, and the mold blank (100) is installed on the dividing fixture; S40. The indexing fixture is rotated at a certain angle so that the lower inclined processing surface (322) of one of the blade cavities (320) is perpendicular to the reference plane, and the four-axis machine tool processes the vertical processing surface (321) of the blade cavity (320) into an upper inclined processing surface (323), wherein the size of the upper inclined processing surface (323) increases from the processing plane (110) toward the bottom surface (120); S50. Repeat step S40 until the vertical processing surfaces (321) of all blade cavities (320) are processed into the upward inclined processing surfaces (323).

2. The rotor mold processing method according to claim 1, characterized in that: The rotor mold processing method further includes step S11, which is placed before step S20. Step S11 includes: The bottom surface (120) of the mold blank (100) is fixed to the clamping plate (200), and the central axes of the mold blank (100) and the clamping plate (200) are aligned.

3. The rotor mold processing method according to claim 2, characterized in that: The step S11 further includes: The bottom surface (120) of the mold blank (100) is provided with a convex ring (121), and the clamping plate (200) is provided with a groove (210) that matches the convex ring (121), so that a tool withdrawal groove (101) is formed between the mold blank (100) and the clamping plate (200).

4. The rotor mold processing method according to claim 2, characterized in that: The method of fixing the bottom surface (120) of the mold blank (100) to the chuck (200) comprises: The mold base (100) and the clamping plate (200) are fixedly connected by welding, screwing or gluing.

5. The rotor mold processing method according to claim 1, characterized in that: The mold base (100) is machined by the four-axis machine tool to form a rough mold cavity (300), comprising: The four-axis machine tool processes layer by layer from the processing plane (110) of the mold blank (100) toward the bottom surface (120) of the mold blank (100).

6. The rotor mold processing method according to claim 5, characterized in that: The four-axis machine tool processes the mold blank (100) layer by layer from the processing plane (110) to the bottom surface (120) of the mold blank (100), including: The four-axis machine tool processes the blade cavities (320) one by one.

7. The rotor mold processing method according to claim 5, characterized in that: The four-axis machine tool processes the mold blank (100) layer by layer from the processing plane (110) to the bottom surface (120) of the mold blank (100), including: The four-axis machine tool performs processing along all blade cavities (320).

8. Rotor mold, characterized in that, The rotor mold (600) is manufactured by the rotor mold processing method according to any one of claims 1 to 7.

9. A rotor, characterized in that The rotor (720) is manufactured by the rotor mold (600) according to claim 8.

10. Rotor pump, characterized in that The rotor pump includes a pump body (710) and two rotors (720) according to claim 9, the two rotors (720) having different rotation directions, the pump body (710) being provided with a volume chamber (701) and a feed port (702) and a discharge port (703) respectively connected to the volume chamber (701), and the two rotors (720) being rotatably connected in the volume chamber (701).

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