Milling cutter, scroll plate, scroll compressor, and scroll plate manufacturing method

Abstract

The invention provides a milling cutter, a scroll plate, a scroll compressor and a manufacturing method of the scroll plate. The milling cutter is used for machining a scroll wrap of a scroll plate of the scroll compressor in a milling mode and comprises a rod part and a cutting part, and the cutting part is located at one end of the rod part. And the shape and the size of the longitudinal section of the milling cutter are consistent with those of the cross section of the vortex tooth groove of the vortex plate. The cutting part is conical, so that the diameter of the cutting part is gradually reduced in the direction away from the rod part. By adopting the milling cutter provided by the invention, the relatively low machining cost can be taken into account on the basis of ensuring that the scroll wrap has relatively high machining precision. Besides, the cutting part of the milling cutter provided by the invention is conical, and the vortex tooth processed by the milling cutter has an inclined tooth surface, so that the root strength of the vortex tooth is improved, and the service life of the vortex plate is prolonged.

Description

Technical Field

[0001] The present disclosure relates to the technical field of compressors, and particularly to a milling cutter for machining a scroll plate of a scroll compressor, a scroll plate of a scroll compressor, a scroll compressor, and a manufacturing method of the scroll plate. Background Art

[0002] Scroll compressors have many advantages such as simple structure, small size, light weight, few parts (especially few vulnerable parts), and high reliability, and thus are widely used in various devices, for example, refrigerators and air conditioners. The compression mechanism of a scroll compressor can be composed of a first scroll plate and a second scroll plate. During the working process, the scroll teeth of the first scroll plate cooperate with the scroll teeth of the second scroll plate to compress fluids such as refrigerants. For example, the first scroll plate is a stationary scroll plate and the second scroll plate is a moving scroll plate, or the first scroll plate is a driven scroll plate and the second scroll plate is a driving scroll plate.

[0003] In order to ensure that the scroll compressor has better working performance, it is necessary for the scroll teeth of the two scroll plates to reach a better sealing and mating state. For example, it is necessary for the scroll teeth of the moving scroll plate to reach a better sealing and mating state with the scroll teeth of the stationary scroll plate, which requires the scroll teeth to have a high machining accuracy. Summary of the Invention

[0004] In view of this, the present disclosure provides a milling cutter, a scroll plate, a scroll compressor, and a manufacturing method of scroll teeth to improve the problem that scroll teeth with high machining accuracy have high machining costs.

[0005] On the one hand, the present disclosure provides a milling cutter. The milling cutter is used to machine the scroll teeth of a scroll plate of a scroll compressor by milling. The milling cutter includes a rod portion and a cutting portion, and the cutting portion is located at one end of the rod portion. The shape and size of the longitudinal section of the cutting portion are consistent with the shape and size of the cross section of the spiral tooth groove of the scroll plate. The cutting portion is conical, and the diameter of the cutting portion gradually decreases along the direction away from the rod portion.

[0006] In a possible implementation, the cutting portion defines a taper angle α, and the value range of the taper angle α is 1 to 5 degrees. Preferably, the value of the taper angle α is basically 2 degrees.

[0007] In a possible implementation, the cutting portion includes one or more cutting teeth, and each cutting tooth defines a helix angle β. The value range of the helix angle β is 35 degrees to 45 degrees. Preferably, the value of the helix angle β is basically 40 degrees.

[0008] In a possible implementation, the material of the milling cutter is metal ceramic, or the milling cutter is a hard tool or a CBN tool.

[0009] On the other hand, the present disclosure also provides a scroll plate of a scroll compressor. The scroll plate includes scroll teeth, and the scroll teeth have a pair of inclined side walls. The scroll plate is formed by simultaneously machining two opposite side walls of the scroll teeth and the bottom surface of the scroll teeth with a milling cutter. The milling cutter includes a shank portion and a cutting portion. The cutting portion is conical, and the diameter of the cutting portion gradually decreases along the direction away from the shank portion. The shape and size of the longitudinal section of the milling cutter are consistent with the shape and size of the cross section of the scroll tooth groove of the scroll plate. The distance between this pair of side walls gradually increases along the direction from the top to the bottom of the scroll teeth.

[0010] In a possible implementation, each side wall of the scroll teeth defines an inclination angle γ, and the value range of the inclination angle γ is from 1 degree to 5 degrees. Preferably, the value of the inclination angle γ is basically 2 degrees.

[0011] On the other hand, the present disclosure also provides a scroll compressor. The scroll compressor includes a housing, a compression mechanism, and a driving mechanism. The housing is provided with a suction port and a discharge port. The compression mechanism is housed in the housing and includes a first scroll plate and a second scroll plate. The scroll teeth of the first scroll plate and the scroll teeth of the second scroll plate have a matching structure to cooperate to form a compression chamber. The driving mechanism is used to drive the second scroll plate to rotate relative to the first scroll plate or to drive the second scroll plate to drive the first scroll plate to rotate together, so as to compress the medium from the suction port and discharge the compressed medium from the discharge port. Here, each of the first scroll plate and the second scroll plate is the aforementioned scroll plate.

[0012] In a possible implementation, the first scroll plate is a stationary scroll plate, the second scroll plate is a moving scroll plate, and the moving scroll plate rotates relative to the stationary scroll plate; or, the first scroll plate is a driven scroll plate, the second scroll plate is a driving scroll plate, and the driving scroll plate drives the driven scroll plate to rotate together.

[0013] In yet another aspect, the present disclosure also provides a manufacturing method of a scroll plate of a scroll compressor. The scroll plate has a disc-shaped end plate and scroll teeth extending from the side surface of the disc-shaped end. The manufacturing method includes: simultaneously machining two opposite side walls of the scroll teeth and the bottom surface of the scroll teeth with a milling cutter. Wherein, the milling cutter includes a rod portion and a cutting portion. The cutting portion is located at one end of the rod portion. The shape and size of the longitudinal section of the milling cutter are consistent with the shape and size of the cross section of the scroll tooth groove of the scroll plate. The cutting portion is conical, and the diameter of the cutting portion gradually decreases along the direction away from the rod portion. A pair of side walls are inclined, and the distance between the pair of side walls gradually increases along the direction from the top to the bottom of the scroll teeth.

[0014] In a possible implementation, the manufacturing method further includes: driving the scroll disk to rotate about its central axis, wherein the milling cutter simultaneously processes two opposite side walls of the scroll tooth and the bottom surface of the scroll tooth, including: advancing the milling cutter to a position flush with the outer side surface of the scroll disk and the scroll tooth, and while translating the milling cutter in a direction perpendicular to the central axis, using the rotating milling cutter to simultaneously process two opposite side walls of the scroll tooth and the bottom surface of the scroll tooth.

[0015] In a possible implementation, the manufacturing method further includes: driving the milling cutter to advance to a position flush with the outer side surface of the scroll disk and the scroll tooth, wherein the milling cutter simultaneously processes two opposite side walls of the scroll tooth and the bottom surface of the scroll tooth, including: driving the scroll disk to perform a scroll curve motion relative to the milling cutter, and while driving the milling cutter to rotate, so that the milling cutter simultaneously processes two opposite side walls of the scroll tooth and the bottom surface of the scroll tooth.

[0016] In a possible implementation, using the milling cutter to simultaneously process two opposite side walls of the scroll tooth and the bottom surface of the scroll tooth includes: using a cermet milling cutter or a cemented carbide milling cutter or a CBN milling cutter to simultaneously process two opposite side walls of the scroll tooth and the bottom surface of the scroll tooth.

[0017] In a possible implementation, the manufacturing method further includes: after the milling cutter is worn and its size is reduced, grinding the end face of the cutting part away from the rod part, and grinding the part where the cutting part intersects with the rod part, so that the ground cutting part has the size and shape of the cutting part before grinding or is close to the size and shape of the cutting part before grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below.

[0019] It should be understood that only some embodiments of the present disclosure are shown below and should not be regarded as a limitation of the scope.

[0020] It should be understood that the same or similar reference numerals are used in the drawings to represent the same or similar elements.

[0021] Figure 1 is a schematic structural diagram of a milling cutter according to an embodiment of the present disclosure.

[0022] Figure 2 Schematically shows Figure 1 the grinding process of the milling cutter in

[0023] Figure 3 Schematically shows the grinding process of a milling cutter according to the related art.

[0024] Figure 4Is a schematic cross-sectional view of at least a part of a scroll plate according to an embodiment of the present disclosure.

[0025] Figure 5 Is a schematic longitudinal cross-sectional view of a scroll compressor according to an embodiment of the present disclosure.

[0026] Figure 6 Is Figure 5 A schematic cross-sectional view of the compression mechanism of the scroll compressor in

[0027] Figure 7 Is a schematic flow chart of a process for manufacturing a scroll plate according to an embodiment of the present disclosure.

[0028] Figure 8 Is a schematic flow chart of a process for manufacturing a scroll plate according to another embodiment of the present disclosure.

[0029] Figure 9 Schematically shows Figure 7 The motion states of the scroll plate and the milling cutter in the process of

[0030] Figure 10 Schematically shows Figure 8 The motion states of the scroll plate and the milling cutter in the process of Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments.

[0032] To ensure that the scroll compressor has better working performance, it is necessary for the scroll teeth of the two scroll plates to reach a better sealing and mating state. For example, it is necessary for the scroll teeth of the moving scroll plate and the stationary scroll plate to reach a better sealing and mating state, which requires the scroll teeth to have a high machining accuracy. For example, the tooth surface of the scroll teeth (such as the top surface and / or bottom surface of the scroll teeth) needs to have a better surface roughness (for example, Ra≤0.6um). Also, the dimensions and shapes of the scroll teeth of the moving scroll plate and the stationary scroll plate need to have a better matching degree.

[0033] However, scroll teeth with higher machining accuracy have higher machining costs. For example, CBN (cubic boron nitride) tools can be used to machine the scroll teeth, and the assembled moving and stationary scroll plates are run in for a longer time. This method results in a higher machining cost due to the longer machining time and higher tool cost. Also, cemented carbide tools can be used to machine the scroll teeth, the scroll teeth are ground, and the assembled moving and stationary scroll plates are run in for a period of time. This method requires sewage treatment due to the longer machining time, higher tool cost, and the generation of waste water, and the machining cost is high.

[0034] Exemplary milling cutter

[0035] Reference Figure 1 , the present disclosure provides a milling cutter 10. The milling cutter 10 can be used to machine the scroll teeth of a scroll disk of a scroll compressor by milling. As Figure 1 shown, the milling cutter 10 can include a rod portion 11 and a cutting portion 12 (also referred to as a cutting edge portion), and the cutting portion 12 is located at one end of the rod portion 11. The shape and size of the longitudinal section of the milling cutter are consistent with the shape and size of the cross section of the scroll tooth groove of the scroll disk. Here, the cutting portion 12 can be conical, and the diameter of the cutting portion 12 gradually decreases along the direction away from the rod portion 11 (i.e., the S direction in Figure 1 ).

[0036] During the process of machining the scroll teeth, the milling cutter 10 with the above structure is more balanced in force, and the force applied by the milling cutter 10 to the workpiece is also more balanced. This helps to avoid or reduce the offset of the milling cutter 10 and the workpiece during the machining process, and further helps to improve the machining accuracy of the scroll teeth. For example, it reduces the surface roughness of the tooth surface and makes the sizes and shapes of the scroll teeth of the moving scroll disk and the stationary scroll disk have a better match. On this basis, subsequent grinding and / or running-in processes can be cancelled, or the duration of subsequent grinding and / or running-in processes can be reduced. Therefore, by using the milling cutter 10 provided by the present disclosure, it is possible to ensure a relatively high machining accuracy of the scroll teeth while taking into account a relatively low machining cost.

[0037] In addition, as Figure 2 shown, since the cutting portion 12 of the milling cutter 10 provided by the present disclosure is conical, after a part of it is ground off (i.e., the portion filled with scattered points in Figure 2 ), the ground cutting portion 12 can have dimensions and a shape close to those of the cutting portion 12 before grinding. This enables the milling cutter 10 provided by the present disclosure to be ground multiple times, and further helps to improve its service life and further reduce the manufacturing cost. In contrast, as Figure 3 shown, for the milling cutter 10a according to the related art with a cylindrical cutting portion 12a, after a part of it is ground off (i.e., the portion filled with scattered points in Figure 3 ), the ground cutting portion 12a will become thinner as a whole, which makes it impossible for the ground cutting portion 12a to have dimensions and a shape close to those of the cutting portion 12a before grinding, and thus it cannot be used continuously.

[0038] In addition, since the cutting portion 12 of the milling cutter 10 provided by the present disclosure is conical, as Figure 4 shown, the scroll teeth 22 machined by it have an inclined tooth surface 221, so that the top of the scroll teeth 22 is thinner and the bottom is thicker. This helps to improve the root strength of the scroll teeth 22, and further improves the service life of the scroll disk 20.

[0039] Return to Figure 1 , the cutting part 2 can define a taper angle α, and the value range of the taper angle α can be from 1 to 5 degrees. For example, the taper angle α can be 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5 or 5. Preferably, the value of the taper angle α can be basically 2 degrees.

[0040] If the angle of the taper angle α is too small, the number of times the milling cutter 10 can be reground is too small. If the angle of the taper angle α is too large, it will cause the root of the scroll tooth 22 to be too thick and the top to be too thin. On the one hand, this will reduce the displacement of the scroll compressor, and on the other hand, it will make it difficult to install a sealing ring on the top of the scroll tooth 22. Taking the angle of the taper angle α as 1 degree to 5 degrees, preferably 2 degrees, can balance the requirements of the above two aspects.

[0041] Continue to refer to Figure 1 , the cutting part 12 can also include one or more cutting teeth 121, and each cutting tooth 121 can define a helix angle β, and the value range of the helix angle β can be from 35 degrees to 45 degrees. Preferably, the value of the helix angle β can be basically 40 degrees.

[0042] The larger the angle of the helix angle β, the longer the contact length between the cutting edge of the cutting tooth 121 and the workpiece during the machining process, which is beneficial to improving the cutting efficiency but will increase the cutting resistance. Taking the angle of the helix angle β as 35 degrees to 45 degrees, preferably 40 degrees, can balance a better cutting rate and a smaller cutting resistance.

[0043] Regarding the material of the milling cutter 10, the present disclosure does not make special restrictions. As a possible implementation, the material of the milling cutter 10 can be cermet, or the milling cutter 10 is a CBN tool or a cemented carbide tool. The existing cost of machining a scroll disk with a CBN tool is relatively high, while the cost of a cermet milling cutter is lower than that of a CBN tool, and the price is at the level of cemented carbide. For the cermet milling cutter of the present disclosure, after one-time machining, the value of its roughness Ra can be less than 0.6 um. Therefore, the requirement of roughness can be met without a grinding process, achieving an effect similar to that of a CBN tool. Moreover, by simultaneously milling the two side walls and the bottom surface of the scroll tooth, time can also be saved. In addition, the cermet material has higher toughness than ceramic materials, is more wear-resistant than cemented carbide and has a faster cutting speed. The milling cutter 10 made of cermet material has excellent chipping resistance and wear resistance, and has excellent thermal conductivity, which is a better choice for steel part machining. The hardness of cermet is higher than that of sintered cemented carbide materials. Compared with cemented carbide, it has a lower affinity with ferrous metal workpieces to be machined under high-temperature conditions, and can obtain better surface finish, making it possible to machine from low speed to high speed. During high-speed finish machining, the milling cutter 10 made of cermet material has a long service life. Under the same cutting conditions, the milling cutter 10 made of cermet material can obtain stronger wear resistance and surface accuracy.

[0044] Exemplary scroll plate

[0045] The present disclosure also provides a scroll plate 20 of a scroll compressor, which can be machined by the milling cutter 10 described above. The scroll plate is formed by simultaneously machining two opposite side walls and the bottom surface of the scroll teeth by the milling cutter. The cutting part is conical. The milling cutter includes a tool shank part and a cutting part. The diameter of the cutting part gradually decreases along the direction away from the tool shank part. The shape and size of the longitudinal section of the milling cutter are consistent with the shape and size of the cross section of the scroll tooth groove of the scroll plate. Refer to Figure 4 , the scroll plate 20 may include scroll teeth 22. The scroll teeth 22 may have a pair of inclined side walls 221. The spacing between the pair of side walls 221 may gradually increase along the direction from the top of the scroll teeth 22 to the bottom of the scroll teeth 22 (i.e., Figure 4 the S direction in

[0046] According to the above structure of the scroll plate 20 provided by the present disclosure, the top of the scroll teeth 22 is thinner and the bottom is thicker, which helps to improve the root strength of the scroll teeth 22, and further improves the service life of the scroll plate 20. In addition, the scroll plate 20 with the above structure can be machined by the above-mentioned milling cutter 10, so that on the basis of ensuring relatively high machining accuracy of the scroll teeth 22, relatively low machining costs can be taken into account.

[0047] Continue to refer to Figure 4 , each side wall 221 of the scroll teeth 22 may define an inclination angle γ. The value range of the inclination angle γ may be from 1 degree to 5 degrees. For example, the inclination angle γ may be 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5 or 5. Preferably, the value of the inclination angle γ may be basically 2 degrees.

[0048] If the angle of the inclination angle γ is too small, the number of times the milling cutter 10 can be reground is too small. If the angle of the inclination angle γ is too large, it will cause the root of the scroll teeth 22 to be too thick and the top to be too thin. On the one hand, this will reduce the displacement of the scroll compressor, and on the other hand, it will be difficult to install a sealing ring on the top of the scroll teeth 22. Taking the angle of the inclination angle γ as 1 degree to 5 degrees, preferably 2 degrees, can take into account the requirements of the above two aspects.

[0049] Exemplary scroll compressor

[0050] The present disclosure also provides a scroll compressor 100. Refer to Figure 5 and Figure 6, the scroll compressor 100 may include a housing 110, a compression mechanism 120, and a drive mechanism 130. The housing 110 may be provided with a suction port 111 and a discharge port 112. The compression mechanism 120 may be housed in the housing 110 and include a first scroll disk 20a and a second scroll disk 20b. The scroll teeth of the first scroll disk 20a and the scroll teeth of the second scroll disk 20b have a mating structure to cooperate to form a compression chamber. The drive mechanism 130 may be used to drive the second scroll disk 20b to rotate relative to the first scroll disk 20a or to drive the second scroll disk 20b to drive the first scroll disk to rotate together, so as to compress the medium from the suction port 111 and discharge the compressed fluid, for example, refrigerant, from the discharge port 112. Here, each of the first scroll disk 20a and the second scroll disk 20b may be the aforementioned scroll disk 20.

[0051] Specifically, the first scroll disk 20a is a stationary scroll disk, the second scroll disk 20b is a moving scroll disk, and the moving scroll disk rotates relative to the stationary scroll disk; or, the first scroll disk 20a is a driven scroll disk, the second scroll disk 20b is a driving scroll disk, and the driving scroll disk drives the driven scroll disk to rotate together.

[0052] The drive device 130 is provided in the housing 111 and may include a stator 131, a rotor 132, and an output shaft 133. The stator 131 may be provided on the outer peripheral side of the rotor 132, and the output shaft 133 is in transmission connection with the rotor 132 to rotate following the rotor 132. The output shaft 133 is in transmission connection with the moving scroll disk 20b to drive the moving scroll disk 20b to move relative to the stationary scroll disk 20a, and thus compress the fluid (such as refrigerant) sucked from the suction port 111. In one example, the output shaft 133 may be an eccentric crankshaft.

[0053] Manufacturing method of exemplary scroll plate

[0054] The present disclosure also provides a manufacturing method of a scroll disk, wherein the scroll disk has a disk-shaped end plate and scroll teeth extending from the side surface of the disk-shaped end. The manufacturing method includes: simultaneously machining two opposite side walls and the bottom surface of the scroll teeth by using a milling cutter. Here, the milling cutter includes a rod portion and a cutting portion, the cutting portion is located at one end of the rod portion, the shape and size of the longitudinal section of the milling cutter are consistent with the shape and size of the cross section of the scroll tooth groove of the scroll disk, the cutting portion is conical, the diameter of the cutting portion gradually decreases along the direction away from the rod portion, a pair of side walls are inclined, and the distance between the pair of side walls gradually increases along the direction from the top to the bottom of the scroll teeth.

[0055] In one embodiment, the scroll disk may be fixed to the spindle of a turning and milling center and rotate with the spindle, while the rotating milling cutter translates from the outer side surface of the scroll disk towards the center of the scroll disk, thereby simultaneously machining two opposite side walls of the scroll teeth and the bottom surface of the scroll teeth on the scroll disk.

[0056] In another embodiment, the scroll disk may be fixed to the worktable of a machining center, and the worktable drives the scroll disk to rotate along the scroll profile. The milling cutter mounted on the spindle can be advanced to a position where the outer side surface of the scroll teeth is flush with the bottom surface of the scroll teeth, and then starts to rotate so as to simultaneously machine the bottom surface of the scroll teeth and two opposite side walls.

[0057] During the process of machining the scroll teeth, the milling cutter with the above structure cooperates with the scroll disk with the above structure, and the force is relatively balanced. The force exerted by the milling cutter on the workpiece is also relatively balanced, which helps to avoid or reduce the offset of the milling cutter and the workpiece during the machining process, and further helps to improve the machining accuracy of the scroll teeth. For example, it reduces the surface roughness of the tooth surface and makes the dimensions and shapes of the scroll teeth of the moving scroll disk and the stationary scroll disk have a better matching degree. On this basis, subsequent grinding and / or running-in processes can be cancelled, or the duration of subsequent grinding and / or running-in processes can be reduced. Therefore, by using the milling cutter provided by the present disclosure, on the basis of ensuring relatively high machining accuracy of the scroll teeth, relatively low machining costs can also be taken into account in some embodiments.

[0058] In one embodiment, simultaneously machining two opposite side walls of the scroll teeth and the bottom surface of the scroll teeth by using a milling cutter includes: simultaneously machining the bottom surface of the scroll teeth and two opposite side walls by using a cermet milling cutter or a cemented carbide milling cutter or a CBN milling cutter.

[0059] Finally, the top of the scroll teeth can be machined with a milling cutter.

[0060] It should be understood that the definitions of the milling cutter and the scroll disk in this embodiment can refer to the definitions in the above embodiments, and will not be elaborated here.

[0061] Reference Figure 7 and Figure 9 , in one embodiment, the above manufacturing method specifically includes the following content. In this embodiment, the manufacturing method can be implemented on a turning and milling center. The scroll disk 910 is installed on the spindle of the turning and milling center, and the milling cutter is installed on the turret of the turning and milling center.

[0062] 710, driving the scroll disk 910 to rotate about its central axis.

[0063] Specifically, the scroll disk 910 can be clamped on the fixture of the spindle of the turning and milling center, and the spindle drives the scroll disk 910 to rotate about its central axis.

[0064] 720. Push the milling cutter 920 to a position where the outer side surface of the scroll disk 910 is flush with the bottom surface of the scroll tooth, and while translating the milling cutter 920 in a direction perpendicular to the central axis, use the rotating milling cutter 920 to simultaneously machine the two opposite side walls and the bottom surface of the scroll tooth.

[0065] For example, the milling cutter 920 can be driven to rotate to provide a cutting force, and the milling cutter 920 is pushed along its axis direction (Z-axis direction) to the outer side surface of the scroll disk 910 (i.e., the outer side surface of the scroll disk parallel to its axis), and is flush with the bottom surface of the scroll tooth in the Z-axis direction. Then, the milling cutter 920 is driven to move linearly in a direction perpendicular to the central axis (X-direction) towards the scroll disk 910, and the rotating milling cutter 920 is used to simultaneously machine the two opposite side walls and the bottom surface of the scroll tooth, so that the scroll disk 920 with scroll teeth can be machined in one go.

[0066] 730. After the milling cutter is worn and its size is reduced, grind the end face of the cutting part away from the rod part, and grind the part where the cutting part meets the rod part, so that the ground cutting part has the size and shape of the cutting part before grinding or is close to the size and shape of the cutting part before grinding.

[0067] Since the cutting part of the milling cutter provided by the present disclosure is conical, after a part is ground off, the ground cutting part can have a size and shape close to that of the cutting part before grinding, which enables the milling cutter provided by the present disclosure to be ground multiple times, thereby helping to improve its service life and further reducing the manufacturing cost.

[0068] Reference Figure 8 and Figure 10 , in another embodiment, the above manufacturing method specifically includes the following content. In this embodiment, the manufacturing method can be implemented on a machining center. The scroll disk 1010 is installed on the workbench of the machining center, and the milling cutter 1020 is installed on the spindle of the machining center.

[0069] 810. Drive the milling cutter 1020 to be pushed to a position where the outer side surface of the scroll disk is flush with the bottom surface of the scroll tooth.

[0070] Specifically, the machining center can push the milling cutter 1020 along its axis direction (z-axis direction) to the outer side surface of the scroll disk 1010 (i.e., the outer side surface of the scroll disk parallel to its axis), and is flush with the bottom surface of the scroll tooth in the z-axis direction.

[0071] 820. While driving the scroll disk 1020 to perform a scroll curve movement relative to the milling cutter 1010, drive the milling cutter 1010 to rotate so that the milling cutter simultaneously machines the two opposite side walls and the bottom surface of the scroll tooth.

[0072] Specifically, the machining center can drive the workbench to drive the scroll disk 1010 to perform a scroll curve movement relative to the rotating milling cutter 1020 in the X-Y plane, and use the rotating milling cutter 1020 to simultaneously machine two opposite side walls of the scroll teeth and the bottom surface of the scroll teeth, so as to machine a scroll disk with scroll teeth at one time.

[0073] 830, after the milling cutter is worn and its size is reduced, the end surface of the cutting part away from the rod part is ground, and the part where the cutting part intersects with the rod part is ground, so that the ground cutting part has the size and shape of the cutting part before grinding or is close to the size and shape of the cutting part before grinding.

[0074] Since the cutting part of the milling cutter provided by the present disclosure is conical, therefore, after a part is ground off, the ground cutting part can have a size and shape close to that of the cutting part before grinding, which enables the milling cutter provided by the present disclosure to be ground multiple times, thereby helping to improve its service life and further reducing the manufacturing cost.

[0075] It should be understood that the term "including" and its variants used in the present disclosure are open-ended, that is, "including but not limited to". The term "one embodiment" means "at least one embodiment", and the term "another embodiment" means "at least one additional embodiment".

[0076] It should be noted that the various specific technical features (elements) described in the above specific embodiments can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0077] It should be understood that multiple components and / or parts can be provided by a single integrated component or part. Alternatively, a single integrated component or part can be divided into multiple separate components and / or parts. The disclosure of "a" or "an" used to describe a component or part does not mean to exclude other components or parts.

[0078] The above is only the specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can think of changes or substitutions, which should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A milling cutter, characterized in that: The milling cutter is used to process the vortex teeth of the vortex disk of the scroll compressor by milling. The milling cutter includes a rod portion and a cutting portion. The cutting portion is located at one end of the rod portion. The shape and size of the longitudinal section of the milling cutter are consistent with the shape and size of the cross-section of the vortex tooth groove of the vortex disk. The cutting portion is conical, and the diameter of the cutting portion gradually decreases in the direction away from the rod portion.

2. The milling cutter according to claim 1, characterized in that The cutting portion defines a cone angle α, and the value range of the cone angle α is 1 degree to 5 degrees.

3. The milling cutter according to claim 2, characterized in that The value of the cone angle α is substantially 2 degrees.

4. The milling cutter according to claim 1, characterized in that The cutting portion includes one or more teeth, each of which defines a helix angle β, and the helix angle β ranges from 35 degrees to 45 degrees.

5. The milling cutter according to claim 4, characterized in that The value of the helix angle β is substantially 40 degrees.

6. The milling cutter according to any one of claims 1 to 5, characterized in that The material of the milling cutter is metal ceramic, or the milling cutter is a cemented carbide cutter or a CBN cutter.

7. A scroll disk of a scroll compressor, characterized in that: The scroll plate includes a scroll tooth, which has a pair of inclined side walls, wherein the scroll plate is formed by a milling cutter simultaneously processing two opposite side walls of the scroll tooth and the bottom surface of the scroll tooth, the milling cutter includes a shank portion and a cutting portion, the cutting portion is conical, and the diameter of the cutting portion gradually decreases in a direction away from the shank portion, the shape and size of the longitudinal section of the milling cutter are consistent with the shape and size of the cross-section of the scroll tooth groove of the scroll plate, and the spacing between the pair of side walls gradually increases in a direction from the top of the scroll tooth to the bottom of the scroll tooth.

8. The scroll disk according to claim 7, characterized in that: Each side wall of the volute defines an inclination angle γ, and the value range of the inclination angle γ is 1 degree to 5 degrees.

9. The scroll disk according to claim 8, characterized in that: The value of the inclination angle γ is basically 2 degrees.

10. A scroll compressor, characterized in that: include: A shell having a suction port and a discharge port; A compression mechanism is contained in the housing and includes a first scroll and a second scroll, wherein the volute of the first scroll and the volute of the second scroll have matching structures to cooperate to form a compression chamber; as well as a driving mechanism for driving the second scroll so that the second scroll rotates relative to the first scroll or for driving the second scroll so that the second scroll drives the first scroll to rotate together, so as to compress the fluid from the suction port and discharge the compressed fluid from the discharge port, wherein Each of the first scroll and the second scroll is a scroll according to any one of claims 7 to 9.

11. The scroll compressor according to claim 10, wherein: The first scroll is a fixed scroll, and the second scroll is a movable scroll, and the movable scroll rotates relative to the fixed scroll; or, the first scroll is a driven scroll, and the second scroll is an active scroll, and the active scroll drives the driven scroll to rotate together.

12. A method for manufacturing a scroll disk of a scroll compressor, characterized in that: The scroll plate has a disk-shaped end plate and a scroll tooth extending from a side of the disk-shaped end, and the manufacturing method includes: The two opposite side walls of the volute and the bottom surface of the volute are processed simultaneously by a milling cutter. Wherein, the milling cutter includes a rod portion and a cutting portion, the cutting portion is located at one end of the rod portion, the shape and size of the longitudinal section of the milling cutter are consistent with the shape and size of the cross-section of the vortex tooth groove of the vortex disk, the cutting portion is conical, and the diameter of the cutting portion gradually decreases in the direction away from the rod portion, the pair of side walls are inclined, and the spacing between the pair of side walls gradually increases in the direction from the top of the vortex tooth to the bottom of the vortex tooth.

13. The method for manufacturing a scroll disk according to claim 12, characterized in that: Also includes: driving the scroll to rotate around its central axis, Wherein, the milling cutter simultaneously processes two opposite side walls of the volute and the bottom surface of the volute, including: The milling cutter is pushed to a position where the outer side surface of the vortex disk is flush with the bottom surface of the vortex tooth, and while the milling cutter is translated in a direction perpendicular to the central axis, the two opposite side walls of the vortex tooth and the bottom surface of the vortex tooth are simultaneously processed by the rotating milling cutter.

14. The method for manufacturing a scroll disk according to claim 12, characterized in that: Also includes: The milling cutter is driven to advance to a position where the outer side surface of the scroll plate is flush with the bottom surface of the scroll tooth, Wherein, the milling cutter simultaneously processes two opposite side walls of the volute and the bottom surface of the volute, including: While driving the scroll plate to move in a scroll profile relative to the milling cutter, the milling cutter is driven to rotate so that the milling cutter processes two opposite side walls of the scroll tooth and the bottom surface of the scroll tooth at the same time.

15. The method for manufacturing a scroll disk according to claim 12, characterized in that: The method of simultaneously processing the two opposite side walls of the volute tooth and the bottom surface of the volute tooth by using a milling cutter includes: simultaneously processing the two opposite side walls of the volute tooth and the bottom surface of the volute tooth by using a metal ceramic milling cutter, a hard metal milling cutter or a CBN milling cutter.

16. The manufacturing method according to any one of claims 12 to 15, characterized in that: Also includes: After the milling cutter is worn and reduced in size, the end surface of the cutting portion away from the rod portion is ground, and the junction of the cutting portion and the rod portion is ground, so that the ground cutting portion has the size and shape of the cutting portion before grinding or is close to the size and shape of the cutting portion before grinding.

Images