Rotor mold machining method, rotor mold, rotor and rotor pump

Abstract

The invention discloses a rotor mold machining method. The rotor mold machining method comprises the following steps that S1, a mold blank with a reference mold hole is prepared; s2, the die blank is flatly placed and installed on a machine tool clamp of a four-axis machine tool, a rough die cavity is machined in the die blank through the four-axis machine tool, the rough die cavity comprises a reference die hole and a plurality of blade cavities, and each blade cavity is provided with a vertical machining face and a lower inclined machining face; s3, an indexing head device is obliquely installed on the datum plane of the four-axis machine tool, the indexing head device is provided with an indexing clamp which is obliquely arranged, and the die blank is installed on the indexing clamp; s4, the indexing clamp rotates by a certain angle, the lower inclined machining face of one blade cavity is made to be perpendicular to the datum plane, and the four-axis machine tool machines the vertical machining face of the blade cavity into an upper inclined machining face; and S5, the step S4 is repeated till the vertical machining faces of all the blade cavities are machined into the upper inclined machining faces. According to the method, the rotor mold meeting the design requirement can be machined without using a five-axis machine tool, and the cost of the rotor pump can be reduced.

Description

Technical Field

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

[0002] The rotor pump is a type of positive displacement pump, which consists of a rotating rotor and a stationary pump body. The two rotors are driven by a pair of synchronous gears to achieve synchronous and opposite rotation of the two rotors. The transmission part in the middle of the rotor adopts interference or overfitting to prevent the medium from entering the cavity. The working volume is changed by the relative movement between the rotor and the pump body, and the material is discharged by the extrusion effect of the rotor during rotation, while leaving space on the other side to form a low pressure, so that the material can be continuously sucked in, thereby achieving continuous transportation 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-fitted during operation. If there is an error, biting will occur. Therefore, it is necessary to wrap the outer layer of the metal frame 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 rotors. Figure 1 As shown in the figure, these are the front and back sides of the rotor mold. Since the structure of the rotor mold is very complex, in order to be able to process the rotor mold that meets the design requirements, it is currently mainly processed by a five-axis machine tool to overcome the interference between the tool and the mold when using a four-axis machine tool. However, the price of a five-axis machine tool is expensive, and general processing companies cannot afford it at all. Therefore, the production of rotor molds needs to be outsourced, which restricts the development of general processing 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 choice or create conditions.

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

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

[0008] S20. The mold blank is mounted on a machine tool fixture of a four-axis machine tool, so that the processing plane is parallel to the reference plane of the four-axis machine tool, and the mold blank is processed 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 which has a vertical processing surface and a downwardly inclined processing surface, wherein the vertical processing surface is perpendicular to the reference plane, and the size of the downwardly inclined processing surface decreases from the processing plane to the bottom surface;

[0009] S30. A dividing head device is installed obliquely on the reference plane of the four-axis machine tool, the dividing head device is provided with an obliquely arranged dividing fixture, and the mold blank is mounted on the dividing fixture;

[0010] S40. The indexing fixture is rotated at 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, and the size of the upper inclined processing surface increases from the processing plane to 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 prior art, the present method can process a rotor mold 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 rotor molds by themselves, which is beneficial to reducing the manufacturing and maintenance costs of rotor pumps.

[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, the 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 matched with the convex ring, so that a tool withdrawal groove is formed between the mold blank and the clamping plate.

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

[0016] The mold blank 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 processed 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 processing 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 of the mold blank 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 of the mold blank to the bottom surface of the mold blank, including: the four-axis machine tool processes along all the blade cavities.

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

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

[0022] According to the rotor pump of the fourth aspect of the 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 given in part in the following description and in part will be obvious from the following description, or will be learned through 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 easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 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 a mold blank provided by an embodiment of the present invention when connected to a chuck;

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

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

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

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

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

[0035] Fig.11 It is a schematic diagram of the internal structure of the rotor pump provided in 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-retracting 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] Embodiments of the present invention are described in detail below, examples of which 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 only used to explain the present invention, and cannot be understood 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., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and 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, and therefore should not be understood as a limitation on the present invention.

[0039] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. 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 Fig. 9 As shown, according to the rotor mold processing method of the first embodiment of the present invention, it 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 connected to the processing plane 110 and the bottom surface 120 respectively. Generally speaking, the die blank 100 is made of steel to improve its durability. The die blank 100 can be selected as 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 the subsequent smoothing and 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, so 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 need to be clamped when in use, the mold base 100 is not designed with relevant clamping parts during manufacturing, so it is necessary to introduce an external clamping plate 200 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 means including but not limited to welding, screwing or glue fixing.

[0044] Furthermore, the bottom surface 120 of the mold blank 100 is provided with a convex ring 121, and the chuck 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 chuck plate 200. The function of the tool withdrawal groove 101 is to prevent the processing tool from colliding with the chuck plate 200 when through-hole cutting, which is beneficial to protecting the processing tool and recycling the chuck 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 size trimming after being fixed to the chuck 200 to ensure the accuracy of the processing plane 110 and the fit between the mold blank 100 and the chuck 200, such as coaxiality and circular runout, etc., 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 a 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 such a rough mold cavity 300. Figure 1 The rotor mold 600 shown in the figure needs to be roughly processed by a four-axis machine tool and then further processed by auxiliary tools.

[0047] Since the rotor 720 generally has three blades, the rough mold cavity 300 includes three blade cavities 320 in addition to the reference mold hole 310, and all blade cavities 320 are evenly distributed around the reference mold hole 310. Each blade cavity 320 has a vertical processing surface 321 and a downward inclined processing surface 322, the vertical processing surface 321 is perpendicular to the reference plane, and the size of the downward inclined processing surface 322 decreases from the processing plane 110 to the bottom surface 120. Since the vertical processing surface 321 and the downward inclined processing surface 322 can be processed by a four-axis machine tool, multiple four-axis machine tools can be used to improve the production efficiency of the rotor mold 600 without purchasing multiple expensive five-axis machine tools.

[0048] Furthermore, 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, and controls the processing trajectory of the processing 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 that the four-axis machine tool processes 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, 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 processed, it is necessary to use a four-axis machine tool again for fine processing to improve the dimensional accuracy of the rough mold cavity 300. In addition, since the processing of the blade cavity 320 needs to use 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 processing allowance.

[0050] S400. Figures 5 to 8 As shown, the mold base 100 with the rough mold cavity 300 is taken out, and then 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 chuck 200 connected to the mold base 100 is installed on the dividing fixture. Since the dividing head device 400 is a prior art, its structure and working principle are not described in detail in the present invention. The dividing head device 400 in the accompanying drawings is a simplified structure. In practice, the existing dividing head device 400 shall prevail. The dividing head has a rotating handle with a scale, and the user can accurately adjust the rotation angle of the dividing fixture by rotating the handle to achieve high-precision rotation of the mold base 100.

[0051] like Figure 8 As shown, a base 500 is installed on the reference surface of the four-axis machine tool, and the base 500 has an inclined surface 510. The chassis of the dividing head device 400 is fixedly connected to the inclined surface 510, so that the dividing head device 400 can be tilted on the reference surface of the four-axis machine tool. In addition, the dividing head device 400 itself has an inclined indexing fixture, and the tilting direction of the indexing fixture is different from the tilting direction of the inclined surface 510. For example, the inclined surface 510 has an inclined direction from bottom to top to front, and the indexing fixture has an inclined direction from bottom to top to left. Finally, the indexing fixture is set on the reference surface of the four-axis machine tool at a compound tilt angle.

[0052] It is understandable that the inclination angle of the inclined surface 510 and the inclination angle of the indexing fixture need to be calculated according to the inclination of the rotor mold 600. The superposition of the two inclination angles can ensure that one of the upper inclined processing surfaces 323 can be perpendicular to the reference plane. Since rotor molds 600 of different specifications correspond to two different inclination angles, the present invention does not limit the inclination angle of the inclined surface 510 and the inclination angle of the indexing fixture. Regardless of the values ​​of the inclination angle of the inclined surface 510 and the inclination angle of the indexing fixture, as long as the two have different inclination directions, they are within the protection scope 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 vertically process the exposed processing area, thereby processing the vertical processing surface 321 of a blade cavity 320 into an upper inclined processing surface 323, and 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 blank 100 has the following structure: Figure 1 The mold cavity structure shown is formed into a rotor mold 600.

[0056] S700. Separate the rotor mold 600 from the clamping plate 200 after processing. After the rotor mold 600 is processed, it needs to be separated from the clamping plate 200. If the mold base 100 and the clamping plate 200 are fixedly connected by screw connection, then only the corresponding fixing screws need to be loosened; if the mold base 100 and the clamping plate 200 are fixedly connected by welding, then a slitting device needs to be used to slit the two; if the mold base 100 and the clamping plate 200 are fixedly connected by glue, then a special solvent needs to be used to remove the glue between the two.

[0057] Compared with the prior art, the present method can process a rotor mold 600 that meets the design requirements without the use of a five-axis machine tool. Since a four-axis machine tool is a general-purpose machine tool, it is inexpensive and easy to train operators. 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 by the above-mentioned rotor mold processing method. Since the rotor mold 600 does not need to be processed by a five-axis machine tool, it has a significant cost advantage. General processing companies can produce multiple sets of different rotor molds 600 by themselves to enhance their market competitiveness.

[0059] The rotor 720 according to the third embodiment of the present invention is manufactured by the above-mentioned 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 Fig.10 and Fig.11 As shown, the rotor pump 700 according to the fourth embodiment of the present invention includes a pump body 710 and two rotors 720 mentioned 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 a feed port 702 and a discharge port 703 connected to the volume chamber 701. One end of the transmission shaft of each rotor 720 is rotatably connected to the bearing seat 712 through a bearing 721, and the other end is rotatably connected to the open box 713 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, any other structural and dimensional parameters of the two sets of rotor molds 600 are consistent.

[0061] The bearing seat 712 is provided with a gear groove on the side close to the end cover 711, and the gear groove is provided with two gears meshing with each other. The transmission shaft of each rotor 720 passes through the bearing seat 712 and is transmission-connected with the corresponding gear, and one of the transmission shafts extends outside the end cover 711 and is rigidly connected with the power source. In this embodiment, the power source can be selected as a motor. When the power source drives the transmission shaft connected thereto to rotate, under the action of the gear pair, the two transmission shafts rotate synchronously in opposite directions. At this time, the two rotors 720 also rotate synchronously in opposite directions. The working volume is changed by the relative movement between the rotor 720 and the pump body 710, and the material is discharged from the discharge port 703 by means of the extrusion effect of the rotor 720 during rotation, and at the same time, space is left on the other side to form a low pressure, so that the material can be continuously sucked in from the feed port 702, thereby realizing continuous conveying 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 knowledge scope of ordinary technicians in the technical field without departing from the purpose 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 reference mold holes (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 downward 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 upward inclined processing surface (323), and the size of the upward inclined processing surface (323) increases from the processing plane (110) to the bottom surface (120); S50. Repeat step S40 until the vertical processing surfaces (321) of all blade chambers (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) matched with 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 clamping plate (200) comprises: The mold blank (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 blank (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 layer by layer from a processing plane (110) of the mold blank (100) toward a 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 layer by layer from a processing plane (110) of the mold blank (100) toward a bottom surface (120) of the mold blank (100), including: The four-axis machine tool performs processing along all blade cavities (320).

8. A 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. A rotor pump, characterized in that: The rotor pump comprises a pump body (710) and two rotors (720) as described in claim 9, wherein the two rotors (720) have different rotation directions, and the pump body (710) is 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) are rotatably connected in the volume chamber (701).

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