Method and equipment for grinding and polishing shaft type rotating body parts

Abstract

The invention discloses a method and equipment for grinding and polishing a shaft type rotating body part, belongs to a precision machine manufacturing technology, and solves the problems that the outer surface of the conventional shaft type rotating body part with a complex shape cannot be precisely ground and polished, so that a planetary roller screw in a humanoid robot is large in torque and power consumption, low in precision and short in service life, and the like. The horn mouth is defined by the drainage component, the opening of the horn mouth faces the radial outer side, the inlet facing the part is formed by the inner end of the horn mouth, the grinding agent flows in the direction set by the inlet instead of flowing disorderly in the non-direction, and therefore the relative movement of the grinding agent and the surface of the part can be kept as needed; the relative movement speed and flow between the part and the abrasive are increased, and the pressure impacted on the outer surface of the part is increased. The grinding agent is guided to flow through the inlet, effective impact of the grinding agent on the surface of the part is increased, grinding efficiency is improved, then the part rotates around the axis of the part, and uniform grinding precision of the surface of the part is guaranteed.

Description

Technical Field

[0001] The invention belongs to precision machinery manufacturing technology, and specifically relates to a method and equipment for grinding and polishing shaft-type rotating body parts, and is particularly suitable for grinding and polishing the outer surface of a shaft-type rotating body with complex morphology. Background Art

[0002] With the rise and development of emerging industries such as precision manufacturing, industrial machine tools, industrial automation and digital control, humanoid robots, and autonomous driving technology, the requirements for high speed, low torque, low noise, and long life of various planetary roller screws are becoming increasingly higher, forcing the continuous improvement of part processing accuracy and surface morphology quality.

[0003] The planetary roller in the planetary roller screw is one of the shaft-type rotating parts with a complex outer surface. If its outer surface is to be ground and polished, there is no suitable method in the existing processing technology, especially if it is expected to evenly cut off a layer of excess on the complex appearance to keep the original shape contour as intact as possible, which is quite difficult. With the requirements for large quantities, high speed, low torque, low noise, low power consumption and long life of planetary roller screws, the existing solutions have shortcomings. Summary of the invention

[0004] The technical task proposed by the present invention is to overcome the defects of planetary roller screws in humanoid robots, such as large torque and power consumption, short precision and life, which are caused by the inability to accurately grind and polish the outer surfaces of complex-shaped parts of existing shaft-type rotating bodies, and to provide a method and equipment for grinding and polishing shaft-type rotating body parts to meet the manufacturing and working requirements of planetary roller screws in large quantities, high speed, low torque, low noise, low power consumption and long life.

[0005] To achieve the above-mentioned purpose, the method for grinding and polishing shaft-type rotating parts of the present invention causes the part to rotate around the axis of the part while impacting the outer surface of the part with an abrasive, wherein the impact of the abrasive on the outer surface of the part is achieved through relative movement between the part and the abrasive, in particular: a bell mouth is defined by a drainage component, the opening of the bell mouth faces radially outward, and the inner end of the bell mouth constitutes an entrance toward the part, and with the high-speed rotation of the turntable, or the high-speed rotation of the rotating barrel, or the reverse rotation of the turntable and the rotating barrel, the abrasive is guided by the drainage component to impact the outer surface of the part through the bell mouth to increase the pressure and flow density impacting the outer surface of the part.

[0006] In the prior art, the grinding and polishing of shaft-type rotating parts is mostly done by using a rigid grinding wheel to contact the outer surface of the part, and when necessary, the relative position of the grinding wheel and the part is changed to adapt to the complex morphology of the outer surface of the part. Such grinding and polishing equipment and methods have "dead corners" in grinding and polishing, and the cutting is uneven, and even the surface morphology is damaged.

[0007] The prior art also places non-shaft rotating parts in flowing abrasives (such as powder or sand) and polishes the surface of the parts by relying on the relative movement between the abrasives and the parts. However, the abrasives flow slowly and the pressure is low, which is not suitable for efficient and uniform grinding and polishing of shaft rotating parts. In particular, the convex and concave surfaces of the parts are subjected to different degrees of grinding and polishing.

[0008] In the method of the present invention, the self-rotation of the part can ensure that the surface of the part is uniformly ground in all directions.

[0009] The method of the present invention defines a bell mouth by a flow guide member, the opening of the bell mouth faces radially outward, and the inner end of the bell mouth constitutes an inlet toward the part, so that the abrasive flows in the direction set by the inlet, rather than flowing without direction and disorderly, thereby maintaining the relative movement of the abrasive and the surface of the part as needed, and increasing the relative movement speed and flow density between the part and the abrasive. In particular, the abrasive has fluidity. If the abrasive is regarded as a fluid, the abrasive has a tendency to flow to a low-pressure area when grinding the part by flowing, and guiding the flow of the abrasive by the inlet can make the abrasive impact the surface of the part in a concentrated manner, increase the effective impact force of the abrasive on the surface of the part, and improve the grinding efficiency. In the method of the present invention, the abrasive can fully contact the complex surface of the part by its own flow and pressure, and can grind the surface of the part without dead angles by rotating the part, and each part of the complex surface of the part can basically receive the same degree of grinding (such as the pressure and flow rate applied to each part of the surface), so that each part of the complex surface of the part is subjected to almost uniform grinding and polishing.

[0010] The method of the present invention uses flowing abrasive to grind the surface of the part, and uses the uniformity of the abrasive to ensure the grinding accuracy of the surface of the part, thereby reducing the power consumption of the part when it is working and extending the service life of the part. The abrasive can be reused, energy-saving and environmentally friendly. The manufacturing and working requirements of the planetary roller screw with large quantities, high speed, low torque, low noise, low power consumption and long service life are met.

[0011] Furthermore, the relative rotation speed between the turntable and the barrel can be increased, and the abrasive can be guided by the drainage component to impact the outer surface of the part with a larger flow rate and a larger pressure through the bell mouth, thereby improving the grinding effect.

[0012] Preferably, the abrasive is a mixture of fine-grained abrasive (such as white corundum, brown corundum, cubic boron carbide, CBN, diamond, various ceramics, etc.) and liquid (such as oil, etc.), and the abrasive is in a fluid, grease or paste state. Accordingly, the fluidity of the abrasive is increased and the abrasive particles are evenly distributed in the liquid, so that the abrasive can fully contact and move relative to the surface of the part to ensure uniform grinding; at the same time, due to the presence of the liquid, not only can the abrasive particles be prevented from splashing everywhere from the surface of the part, but also the grinding lubrication function can be improved, thereby improving the polishing effect.

[0013] Preferably, the abrasive impacts the outer surface of the part in a direction perpendicular to the axis of the part. This ensures uniform grinding on the vertical plane of the part surface to the maximum extent possible. In addition, the flow rate and pressure of the abrasive are uniformly distributed in the axial direction of the part to improve the uniformity and consistency of grinding. If the abrasive flows axially from one end of the part to the other end, the upstream of the abrasive flow has a greater pressure, flow rate and grinding characteristics, while the pressure, flow rate and grinding characteristics of the abrasive will be weakened downstream of the abrasive flow, resulting in differences in the degree of grinding of different axial parts of the part, which is not conducive to the control of surface profile quality. Specifically, the flow direction of the abrasive during work cannot be determined intuitively, and the flow direction of the abrasive depends on how it is guided, that is, the guidance of the abrasive by the inlet. Therefore, the direction of the inlet can be regarded as the flow direction of the abrasive.

[0014] Preferably, in order to improve the grinding efficiency, multiple parts are distributed in a circle on the turntable, and the parts rotate around the axis of the parts on the turntable while being carried by the turntable rotating around the axis of the turntable to revolve. Accordingly, the turntable carries the multiple parts to revolve, thereby realizing synchronous grinding and polishing of the multiple parts.

[0015] Preferably, the abrasive is placed in a rotatable barrel, and a plurality of parts are distributed in a circle on a turntable and clamped by a fixture and distributed in the barrel and immersed in the abrasive in the barrel. While the parts are rotated around the axis of the parts by the fixture, the abrasive in the barrel flows along with the rotation of the barrel so that the abrasive passes through the bell mouth and impacts the outer surface of the parts. This simplifies the conveying of the abrasive, and also realizes the recovery of the abrasive in the same container, so that the abrasive circulates. In addition, the abrasive applied to each part can maintain a consistent flow rate, flow rate, and pressure, and the grinding of each part is highly consistent.

[0016] Preferably, the barrel is rotated in a direction opposite to that of the turntable, thereby increasing the impact force of the abrasive on the surface of the part.

[0017] The equipment for grinding and polishing shaft-type rotating body parts of the present invention comprises:

[0018] Bucket for holding abrasive;

[0019] The turntable is configured to be rotatable about the turntable axis and to be movable up and down and fixed in position along the turntable axis, and the turntable can be immersed in the barrel when it moves downward along the turntable axis;

[0020] A fixture for clamping parts and rotating the parts, which is arranged on a turntable;

[0021] The flow guide member is arranged on the turntable and forms a bell-shaped mouth, the opening of the bell-shaped mouth faces radially outward, and the inner end of the bell-shaped mouth constitutes an entrance toward the part. The flow guide member is used to guide the abrasive to impact the outer surface of the part through the bell-shaped mouth to increase the pressure impacting the outer surface of the part.

[0022] In view of this, the parts can be installed on the turntable, and the turntable can carry the parts to be immersed in the abrasive in the barrel. Through the self-rotation of the parts and the revolution of the turntable, under the action of the drainage component and the inlet, the drainage component defines the bell mouth, and the opening of the bell mouth faces radially outward, and the inner end of the bell mouth constitutes the inlet toward the parts, so that the abrasive flows in the direction set by the inlet, rather than flowing directionlessly and disorderly. Based on this, the relative movement between the abrasive and the surface of the parts can be maintained as needed, thereby increasing the friction frequency and cutting and extrusion effects between the parts and the abrasive.

[0023] Since the abrasive is fluid, the abrasive can be regarded as a semi-fluid, and the abrasive particles in the abrasive are evenly distributed, so the abrasive can cut the parts evenly by flowing.

[0024] Furthermore, the abrasive particles are small and uniform, and the abrasive can fully contact the complex surface of the part by its own flow and pressure. The rotation of the part can implement dead angle grinding on the surface of the part. Basically, each part of the complex surface of the part can receive the same degree of grinding (such as pressure applied to each part of the surface, flow rate, etc.), so that the complex surface of the part is ground and polished to a consistent degree.

[0025] Preferably, the turntable includes an upper turntable and a lower turntable, and the upper turntable is configured to move up and down along the turntable axis relative to the lower turntable and to be fixed in position;

[0026] The fixture includes a positioning device and a clamping device. The positioning device is arranged on the lower turntable and faces the upper turntable, and the clamping device is arranged on the upper turntable and faces the lower turntable. The positioning device and the clamping device are axially corresponding to each other to axially clamp the part between the two, and the clamping device is rotated by the rotating shaft.

[0027] Accordingly, parts can be mounted on and removed from the fixture by moving the upper turntable up and down.

[0028] Preferably, there are multiple clamps and rotating shafts distributed circumferentially on the turntable, and the rotating shaft is configured to rotate in any of the following ways:

[0029] (1) The plurality of rotating shafts are driven to rotate synchronously by a sprocket drive system or a belt drive system;

[0030] (2) Each of the rotating shafts is driven to rotate directly or indirectly by a motor.

[0031] Since there are multiple fixtures and rotating shafts and they are distributed in a circle on the turntable, their linear speed remains consistent with the revolution of the turntable. Therefore, when the turntable rotates with the parts installed on the fixture, the flow rate and pressure of the abrasive impacting each part can be kept consistent, so that the grinding and polishing of each part tends to be consistent.

[0032] Preferably, the turntable includes a middle turntable, the upper turntable is configured to move up and down along the turntable axis relative to the middle turntable and fix its position, and the middle turntable is configured to move up and down along the turntable axis relative to the lower turntable and fix its position; the fixture includes a connecting shaft configured on the middle turntable, the connecting shaft corresponds to the positioning device and the clamping device in an axial manner, and the connecting shaft is used to clamp the parts axially between the positioning device and the connecting shaft and between the clamping device and the connecting shaft to position the parts and transmit torque. Accordingly, more parts can be ground and polished at the same time during one clamping, and because the turntable rotates with the parts installed on the fixture, the flow rate and pressure of the abrasive impacting each part can be kept consistent, and the grinding and polishing of each part tends to be consistent.

[0033] Preferably, the projection profile of the guide member along the axial direction of the rotating disk presents a single shape or a composite shape, so as to better guide the abrasive as required.

[0034] Preferably, the flow guide member is inclined tangentially on the turntable and defines a bell mouth also inclined tangentially between two adjacent flow guide members, and the inlet is defined by any of the following methods:

[0035] (1) The inlet is defined by two adjacent flow guiding members at the radial inner end of one flow guiding member and the middle portion of the other flow guiding member;

[0036] (2) the inlet is defined between a radially inner end of a flow guide member and a retaining ring;

[0037] (3) The inlet is defined between the radially inner ends of the two flow guide members arranged in a pair.

[0038] Accordingly, the inlet can be configured as required to guide and control the flow of the abrasive.

[0039] Preferably, the barrel and the turntable each include at least two, and the barrel and the turntable are distributed on the same circumference, and a column is arranged at the center of the circumference; the turntable is arranged to be lifted and rotated by the column to turn the turntable to the corresponding barrel position as needed and place it in the corresponding barrel and remove it from the barrel. Accordingly, different barrels are used to hold different abrasives and / or cleaning agents respectively, and undertake functions such as rough grinding, fine grinding, rinsing, and fine washing. Each turntable rotates around the column on the circumference to reach the top of the barrel at different positions, and then the turntable is placed in the barrel by moving up and down to grind or wash the parts on the turntable. The turntable is removed from the barrel for rotation to the next station (barrel position), and when the turntable rotates away from the top of the barrel, the material can be loaded and unloaded. By synchronously rotating each turntable to different stations, the parts can be continuously rough ground, fine ground, rinsed, and fine washed, and the parts only need to be installed and removed once, thereby improving the grinding efficiency. In addition, the parts that have been ground are also cleaned.

[0040] Preferably, at least two of the barrels are independent of each other or combined together, and a corridor container is configured for the barrel position. Independent barrels are convenient for replacement, such as replacing abrasives with barrels. The barrels are combined together to maintain the positional relationship of each barrel. Since the barrels are located in the corridor container, when the turntable rotates and changes positions between the barrel positions, the parts and the residue on the turntable are collected by the corridor container, and will not drip on the ground and affect environmental hygiene.

[0041] The present invention defines a bell mouth by a flow guide member, the opening of the bell mouth faces radially outward, and the inner end of the bell mouth constitutes an inlet toward the part, so that the abrasive flows in the direction set by the inlet, rather than flowing directionlessly and disorderly, thereby maintaining the relative movement between the abrasive and the surface of the part as needed, and increasing the relative movement speed between the part and the abrasive. In particular, the abrasive has fluidity, and if the abrasive is regarded as a semi-fluid, the abrasive has a tendency to flow to a low-pressure area when grinding the part by flowing, and guiding the flow of the abrasive by the inlet can make the abrasive impact the surface of the part in a concentrated manner, increase the effective impact of the abrasive on the surface of the part, and improve the grinding efficiency.

[0042] In the method of the present invention, the abrasive can fully contact the complex surface of the part by its own flow and pressure, and can grind the surface of the part without dead angles through the rotation of the part. Each part of the complex surface of the part can basically receive the same degree of grinding (such as the pressure applied to each part of the surface, flow rate, etc.), so that the complex surface of the part is ground and polished to a consistent degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is an isometric view of a device for grinding and polishing shaft-type rotating body parts according to Example 1 of the present invention;

[0044] Figure 2 for Figure 1Schematic diagram of the turntable being moved out of the barrel;

[0045] Figure 3 for Figure 2 A magnified view of part A;

[0046] Figure 4 for Figure 2 A schematic diagram of another perspective of the turntable in FIG.

[0047] Figure 5 for Figure 4 A magnified view of part B;

[0048] Figure 6 for Figure 2 A schematic diagram of an orthographic projection of a turntable from one perspective;

[0049] Figure 7 for Figure 6 AA section view in;

[0050] Figure 8 for Figure 6 A partial schematic diagram of the BB section in FIG.

[0051] Fig. 9 for Figure 7 Enlarged view of part C;

[0052] Fig.10 It is a schematic diagram of a shaft-type rotating body part;

[0053] Fig.11 A schematic diagram of the structure of the entrance of the present invention;

[0054] Fig.12 Another structural schematic diagram of the inlet of the present invention;

[0055] Fig.13 A third structural schematic diagram of the inlet of the present invention;

[0056] Fig.14 Schematic diagram of the axial section of the turntable of Example 2 of the present invention;

[0057] Fig.15 for Fig.14 A magnified view of the D portion;

[0058] Fig.16 is a schematic diagram of embodiment 3 of the present invention;

[0059] Fig.17 for Fig.16 Schematic diagram of two turntables configured on the same column;

[0060] Description of the numbers in the figure:

[0061] 100 barrels, 101 barrels axis;

[0062] 200 turntable, 201 turntable axis, 202 first motor,

[0063] 210 on the turntable,

[0064] 220 lower turntable, 221 abrasive return hole,

[0065] 230 turntable,

[0066] 240 fixture, 241 positioning device, 242 clamping device, 243 connecting shaft,

[0067] 250 rotating shaft, 251 pulley, 252 synchronous belt, 253 second motor,

[0068] 260 drainage member, 261 bell mouth, 262 open mouth, 263 entrance,

[0069] 270 retaining ring,

[0070] 280 cylinders,

[0071] 300 column, 301 first driver, 302 second driver;

[0072] 400 gallery containers;

[0073] 500 parts, 501 parts axis. DETAILED DESCRIPTION

[0074] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0075] The terms "including" and "having" and any variations thereof in the specification and claims of the present invention are intended to cover non-exclusive inclusions. For example, a method or product comprising a series of technical features is not necessarily limited to those technical features clearly listed, but may also include other technical features that are not clearly listed and can be included in the method or product.

[0076] In the description of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. Among them, "upper" and "lower" are in opposite directions.

[0077] In the description of the present invention, it is necessary to understand that the technical features defined by the terms "first", "second" and the like with sequential concepts are only for the purpose of clearly describing the defined technical features so that the defined technical features can be clearly distinguished from other technical features, but do not represent such naming in actual implementation, and therefore cannot be understood as a limitation of the present invention.

[0078] The present invention is described in detail below in conjunction with specific embodiments and accompanying drawings.

[0079] Example 1

[0080] like Figure 1-9 As shown, a device for grinding and polishing shaft-type rotating parts is expressed, and the device includes a barrel 100, a turntable 200, a clamp 240 and a drainage member 260.

[0081] The barrel 100 is used to contain abrasives;

[0082] The turntable 200 is configured to be able to rotate around the turntable axis 201 and to be able to move up and down and fix its position along the turntable axis 201. When the turntable 200 moves downward along the turntable axis 201, it can be immersed in the barrel 100; the rotation of the turntable 200 is preferably driven by the first motor 202.

[0083] The fixture 240 is used to clamp the parts and rotate with the parts, and the fixture is arranged on the turntable 200;

[0084] The flow guide member 260 is arranged on the turntable 200 and forms a bell-shaped mouth 261, the opening 262 of the bell-shaped mouth faces radially outward, and the inner end of the bell-shaped mouth constitutes an inlet 263 facing the part. The flow guide member is used to guide the abrasive to impact the outer surface of the part through the bell-shaped mouth to increase the pressure impacting the outer surface of the part.

[0085] Fig.10 The figure shows the rollers of a planetary roller screw, which is an example of a shaft-type rotating body part.

[0086] In view of the device, the part 500 can be mounted on the fixture 240 of the turntable 200, and the turntable 200 immerses the part 500 in the abrasive in the barrel 100, so that the part rotates around the part axis 501, and the turntable carries the part to revolve, and under the action of the drainage member and the inlet, a relative movement is generated between the part and the abrasive. Since the inlet allows the abrasive to flow in the direction set by the inlet, rather than flowing without direction and disorder, the relative movement direction of the abrasive relative to the surface of the part can be maintained as needed, the relative movement speed between the part and the abrasive is increased, the pressure and flow rate that impact the outer surface of the part are increased, and the grinding efficiency is increased.

[0087] In particular, the part axis 501 is parallel to the turntable axis 201 and the barrel axis 101, and the turntable axis 201 is coaxial with the barrel axis 101. In operation, the ground part can be ground uniformly no matter where it is located in the barrel.

[0088] Preferably, a flow space is left between the inner wall of the barrel and the radial outer side of the guide member, so that the abrasive can continuously enter the bell mouth guide area through the flow space. In addition, an abrasive reflux hole 221 is provided at a suitable position such as the lower turntable, so that the abrasive flowing into the radial inner side through the guide member can flow through the reflux hole in the barrel for circulation.

[0089] Abrasives are a mixture of fine-grained abrasives (such as white corundum, brown corundum, cubic boron carbide, CBN, diamond, various ceramics, etc.) and liquids (such as oil, etc.). Abrasives are in fluid, grease or paste form. Therefore, the fluidity of the abrasive is increased and the abrasive particles are evenly distributed in the abrasive, so that the abrasive can fully contact and move relative to the surface of the part to ensure uniform grinding; at the same time, due to the presence of oil, it can not only prevent the abrasive particles from splashing everywhere from the surface of the part, but also enhance the grinding lubrication function and polishing effect.

[0090] Furthermore, the abrasive can fully contact the complex surface of the part through its own flow and pressure, and can grind the part surface without dead angles through the rotation of the part. Each part of the complex surface of the part can be ground to the same degree (such as the pressure applied to each part of the surface, flow rate, etc.), so that the complex surface of the part can be ground and polished to a consistent degree.

[0091] When the device of this embodiment is working, the abrasive is placed in a rotatable barrel, and multiple parts are clamped by a fixture and distributed in the barrel and immersed in the abrasive in the barrel. While the parts are rotated around the axis of the parts by the fixture, the abrasive in the barrel follows the rotation of the barrel and flows to impact the outer surface of the parts. In this way, the relative coaxial rotation between the turntable and the rotating barrel can also be achieved. In addition, the abrasive applied to each part can maintain a consistent flow rate, flow rate, and pressure, and the grinding of each part is highly consistent.

[0092] When the turntable is removed from the barrel, the parts can be separated from the abrasive, making it easier to load and unload.

[0093] In this embodiment, the turntable 200 includes an upper turntable 210 and a lower turntable 220. The upper turntable 210 is provided with a cylinder 280, which is used to drive the upper turntable to move up and down relative to the lower turntable 220 along the turntable axis 201 and fix the position. When the position is fixed, the fixture clamps the parts. The fixture 240 includes a positioning device 241 and a clamping device 242. The positioning device 241 is arranged on the lower turntable 220 and faces the upper turntable 210. The clamping device 242 is arranged on the upper turntable 210 and faces the lower turntable 220. The positioning device 241 and the clamping device 242 are axially aligned to clamp the parts axially between the two. The clamping device 242 is rotated by the rotating shaft 250. The clamping device 242 drives the part 500 to rotate by the rotating shaft 250 on the upper turntable 210, and the positioning device 241 and the clamping device 242 make the part revolve around the turntable axis 201 in a direction perpendicular to the relative motion of the abrasive. Accordingly, the part can be mounted on and removed from the fixture by moving the upper turntable up and down.

[0094] The upper turntable 210 and the lower turntable 220 are not necessarily a single plate, but can be a combination. The clamping device 242 and the rotating shaft 250 can be connected as a whole or assembled together, and can play the role of clamping the parts and driving the parts to rotate.

[0095] Among them, the up and down movement of the upper turntable 210 relative to the lower turntable 220 along the turntable axis 201 does not change the circumferential phase angle with the lower turntable 220, that is, the upper turntable 210 and the lower turntable 220 do not rotate relative to each other around the turntable axis 201, which is used to accurately clamp and release parts.

[0096] The drainage member 260 is mounted on the lower turntable 220 or the upper turntable 210, or one piece is mounted on the lower turntable 220, and the other adjacent piece is mounted on the upper turntable 210, and the installation is spaced apart in this way; when the upper turntable 210 moves up and down relative to the lower turntable 220 along the turntable axis 201, the drainage member 260 is synchronized with the turntable where it is located and moves axially. When loading and unloading, the turntables leave the barrel together, and the upper turntable 210 and the lower turntable 220 are axially disengaged, which is convenient for loading and unloading. In particular, the drainage member 260 is arranged at intervals on the lower turntable 220 and the upper turntable 210, that is, one piece of the drainage member is arranged at intervals on the upper turntable, and the other piece is arranged on the lower turntable, then the circumferential distance between the two adjacent drainage members on the upper turntable and the circumferential distance between the two adjacent drainage members on the lower turntable are increased, so that more space for taking and unloading materials can be reserved, which is convenient for taking and placing. When the upper turntable 210 and the lower turntable 220 are brought together and fixed in position, all the drainage components work together to achieve drainage.

[0097] In the illustrated structure, when the part 500 is clamped by the fixture 240, the part axis 501 is parallel to the turntable axis 201, and the inlet 263 faces the part from the radial direction of the part 500, so that the abrasive impacts the outer surface of the part in a direction perpendicular to the part axis. Accordingly, the flow rate and pressure of the abrasive are uniformly distributed in the axial direction of the part, thereby improving the grinding effect. If the abrasive flows axially from one end of the part to the other end, the upstream of the abrasive flow direction has a greater pressure, flow rate and grinding characteristics, while the pressure, flow rate and grinding characteristics of the abrasive will be weakened downstream of the abrasive flow direction, resulting in different degrees of grinding of different parts of the part axially, which is not conducive to the quality control of the outer surface profile. Since the flow direction of the abrasive during work cannot be determined intuitively, and the flow direction of the abrasive depends on how it is guided, that is, the guidance of the abrasive by the inlet, the direction of the inlet can be regarded as the flow direction of the abrasive.

[0098] In this embodiment, the clamp 240 and the rotating shaft 250 are multiple and distributed in a circle on the rotating disk 200, and the multiple rotating shafts 250 are driven by a sprocket drive system or a belt drive system to rotate synchronously. Taking the belt drive system as an example, the rotating shaft 250 is coaxially mounted with a pulley 251, and a synchronous belt 252 is used to mesh with each pulley 251, and then a second motor 253 drives a driving pulley, and the driving pulley drives the belt, and each rotating shaft is driven by the pulley thereon to rotate synchronously, so that all rotating shafts rotate synchronously while the rotating disk is revolving. When the sprocket drive system is selected, the sprocket replaces the pulley, and the chain replaces the synchronous belt. In other embodiments, each rotating shaft 250 can also be driven to rotate directly or indirectly by a motor.

[0099] Since there are multiple fixtures and rotating shafts and they are distributed in a circle on the turntable, they keep the same linear speed as the turntable revolves. Therefore, when the turntable rotates with the parts installed on the fixture, the flow rate and pressure of the abrasive impacting each part can be kept consistent, so the grinding and polishing of each part tends to be consistent. In addition, by rotating multiple parts with the turntable, multiple parts can be ground and polished at the same time, improving the grinding efficiency.

[0100] In this embodiment, the barrel rotates during operation and the barrel rotates in the opposite direction to the rotating disk. This increases the impact of the abrasive on the surface of the part. Figure 11-13 In the figure, the arc segment with an arrow indicates the rotation direction of the turntable. According to the needs, the turntable or the barrel can be rotated separately during operation.

[0101] Changing the relative rotation speed between the turntable and / or the rotating barrel, or changing the radial position of the parts installed on the turntable, or changing the layout and morphology of the drainage components, or changing the formulation of the abrasive, or changing the grinding and polishing time, etc., can change the cutting performance and effect of grinding and polishing.

[0102] The flow guide members 260 are inclined in the tangential direction on the turntable 200 and define a bell mouth that is also inclined in the tangential direction between two adjacent flow guide members, that is, the flow guide members are not located in the diameter direction of the turntable, but are inclined from the diameter direction to the tangential direction of the turntable. The radial direction and the tangential direction are determined with reference to the circumference of the distribution of the flow guide members. In addition, the inlet is defined by any of the following methods:

[0103] (1) Fig.11 As shown, the inlet 263 is defined by two adjacent flow guide members 260 at the radial inner end of one flow guide member and the middle portion of the other flow guide member. In this case, each flow guide member is an arc surface, and its projection profile along the axial direction of the rotating disk presents a single shape, which is an arc line segment.

[0104] (2) Fig.12 As shown, the inlet 263 is defined between the radial inner end of a flow guide member 260 and a retaining ring 270; in this case, the flow guide member is an arc surface, and its projection profile along the axial direction of the rotating disk presents a single shape, which is an arc segment.

[0105] (3) Fig.13 As shown, the inlet 263 is defined between the radial inner ends of the two drainage members 260 arranged in pairs. In this case, the drainage members are all arc surfaces, the two drainage members arranged in pairs are basically arranged in axisymmetric manner, and the projection profiles of the two drainage members arranged in pairs along the axial direction of the rotating disk present a composite shape. Fig.13 As shown, the paired guide components are distributed on two concentric circles, and correspondingly, the parts distributed on the two concentric circles can be ground.

[0106] Accordingly, the inlet can be configured as needed to better guide the flow of the abrasive. Regardless of which method is adopted, the purpose is to allow more abrasive to impact the outer surface of the part 3 when the abrasive moves relative to the part.

[0107] Example 2

[0108] like Figure 14-15 As shown, a device for grinding and polishing shaft-type rotating parts is expressed. The device is a further improvement of Example 1, so the structure of this embodiment includes all the structures of Example 1.

[0109] In this embodiment, the turntable 200 includes a middle turntable 230, and a cylinder 2801 is configured for the upper turntable 210 to drive the upper turntable to move up and down along the turntable axis 201 relative to the middle turntable 230 and fix the position, and a cylinder 2802 is configured for the middle turntable 230 to drive the middle turntable to move up and down along the turntable axis 201 relative to the lower turntable 220 and fix the position. The fixture 240 includes a connecting shaft 243 configured on the middle turntable 230, and the connecting shaft 243 corresponds to the positioning device 241 and the clamping device 242 in an axial manner. The connecting shaft 243 is used to clamp the part axially between the positioning device 241 and the connecting shaft 243 and between the clamping device 242 and the connecting shaft 243 to position the part 500 and transmit torque. Accordingly, grinding and polishing can be performed on more parts at the same time to improve efficiency. Moreover, since the flow rate and pressure of the abrasive impacting each part can be kept consistent when the turntable rotates with the parts installed on the fixture, the grinding and polishing performed on each part tends to be consistent. In this embodiment, the upper turntable 210 and the middle turntable 230 can move up and down together.

[0110] In this embodiment, the flow guide member 260 can be configured as needed on the upper turntable 210, the middle turntable 230, and the lower turntable 220. In particular, the flow guide member 260 is configured on the lower side end surface of the upper turntable 210 and the middle turntable 230 that can move up and down to facilitate the disassembly of parts.

[0111] Example 3

[0112] like Figure 16-17 As shown, a device for grinding and polishing shaft-type rotating parts is expressed. The device is a further improvement of Example 1 or Example 2, so the structure of this embodiment includes all the structures of Example 1 or Example 2.

[0113] In this embodiment, the barrel 100 and the turntable 200 each include at least two barrels 100 and the turntable 200 are distributed on the same circumference, and the center of the circumference is provided with a column 300; the turntable 200 is configured such that the second driver 302 drives the column 300 to lift and lower, and the second driver 301 drives the column to rotate so as to rotate the turntable to the corresponding barrel position as required and place it in the corresponding barrel and remove it from the barrel. Accordingly, different barrels are used to hold different abrasives, cleaning agents, etc., respectively, and undertake the functions of rough grinding, fine grinding, rinsing, and fine washing. Each turntable rotates around the column on the circumference to reach the top of the barrel at different positions, and then the turntable is placed in the barrel by moving up and down to grind the parts on the turntable, and the turntable is removed from the barrel for rotation to the next station (barrel position). When the turntable rotates away from the top of the barrel, it can load and unload materials. By rotating the turntables synchronously to different workstations, the parts can be continuously rough ground, fine ground, rinsed and fine washed. The parts only need to be installed and removed once, which improves the grinding efficiency. In addition, the parts after grinding are also cleaned.

[0114] In this embodiment, at least two barrels 100 are independent of each other, or are combined together to configure a corridor container 400 for the barrels. Independent barrels are also convenient for replacement, such as replacing abrasives with barrels. The barrels are combined together to maintain the positional relationship of each barrel. Since the barrels are equipped with a corridor container, when the turntable rotates and changes positions between the barrels, the parts and the residue on the turntable are collected by the corridor container, and will not drip on the ground and affect environmental hygiene.

[0115] Based on this embodiment, the following more specific structures and methods may be adopted:

[0116] A plurality of barrels 100 are evenly arranged on the radial outer side of the column 300, and the barrels contain rough grinding abrasives, fine grinding abrasives, fine grinding polishing agents, rinsing solvents, cleaning solvents, and empty barrels, etc. In this way, all grinding processes and post-grinding cleaning can be completed on one device, thereby improving work efficiency.

[0117] The barrels 100 are connected by an annular groove, which serves as a corridor container 400, so that the barrels form an annular assembly. When the turntable 200 switches from one barrel position to another, the scattered abrasives are collected by the annular groove to avoid scattering on the ground. All the scattered materials are inside the equipment, which not only saves production costs but also improves the working environment.

[0118] The turntable 200 can rotate around the axis of the column 300, and the number of the turntables can be the same as the number of the barrels, or less than the number of the barrels, according to the process requirements. Whenever the turntable reaches the position of the barrel, each turntable can be immersed in the barrel for grinding or cleaning.

[0119] At any barrel position, use the travel switch to cut off the power supply of the turntable rotation, so that the turntable stops rotating, so as to raise and lower the turntable, and lower the turntable into the barrel or lift it out of the barrel. When the corresponding empty barrel position is reached, start the cylinder 280 on the upper turntable 210 to disengage the upper turntable 210 from the lower turntable 220, unload the ground parts 500, and then load the parts to be processed. Start the cylinder in the reverse direction to close the upper turntable 210 and the lower turntable 220, and wait for the next station to be transferred.

[0120] Two drivers are configured for the column 300. The second driver 302 is responsible for the lifting and lowering of the column to drive all the turntables 200 to immerse in the barrel 100 or to lift and detach from the barrel. The first driver 301 is responsible for driving all the turntables 200 to rotate through the crossbeam on the column.

[0121] The second motor 253 on the upper turntable 210 is started, driving all the rotating shafts 250 to rotate, and driving the part 500 to rotate around the part axis through the clamping device 242. At the same time, the first motor 202 is also started, driving the turntable 200 to rotate in a set direction. The part rotates around the part axis 501 while revolving around the turntable axis 201.

[0122] Initially, the abrasive in the barrel 100 is almost stationary with the barrel. The rotating and revolving parts impact the abrasive. Since the direction of rotation is almost perpendicular to the axis direction of the part installation, the abrasive impacts the outer surface of the part perpendicular to the axis of the part, so that the abrasive is evenly ground in the axis direction of the part. Since the part is slowly rotating, the part can be evenly ground in 360 degrees on the circumference.

[0123] Due to the presence of the guide member 260, when the turntable 200 rotates, more abrasives impact the outer surface of the part 500 at high pressure, thereby improving the grinding efficiency.

[0124] After the set grinding time is reached, the turntable 200 system is lifted under the action of the second driver 302, and then the turntable is rotated to above the barrel of another station under the action of the first driver 301.

[0125] The barrels at different workstations are shifted in the same way as above and will not be described in detail.

[0126] As mentioned above, by rotating the turntable between the barrels at different stations and immersing them in the barrels, different materials are placed in different abrasive barrels to achieve functions such as rough grinding, fine grinding, polishing, rinsing, and fine washing.

Claims

1. A method for grinding and polishing a shaft-type rotating body part, wherein the part (500) is rotated around the part axis (501), and an abrasive is used to impact the outer surface of the part, wherein the abrasive impacts the outer surface of the part through relative motion between the part and the abrasive, and the method is characterized in that: A bell mouth (261) is defined by a flow guide member (260), an opening (262) of the bell mouth faces radially outward, an inner end of the bell mouth forms an inlet (263) toward the part, and the flow guide member (260) guides the abrasive through the bell mouth (261) to impact the outer surface of the part to increase the pressure and flow density impacting the outer surface of the part.

2. The method for grinding and polishing a shaft-type rotating body part according to claim 1, characterized in that: Abrasives are a mixture of fine-grained abrasives and liquids, and are in the form of fluid, grease or paste.

3. The method for grinding and polishing a shaft-type rotating body part according to claim 1, characterized in that: The abrasive impacts the outer surface of the part in a direction perpendicular to the axis (501) of the part.

4. The method for grinding and polishing a shaft-type rotating body part according to any one of claims 1 to 3, characterized in that: A plurality of parts (500) are distributed in a circular pattern on a turntable (200). The parts rotate on the turntable around the axis of the parts while being carried in orbit by the turntable (200) rotating around the axis (201) of the turntable.

5. The method for grinding and polishing a shaft-type rotating body part according to any one of claims 1 to 3, characterized in that: The abrasive is placed in a rotatable barrel (100), and a plurality of parts (500) are distributed in a circle on a turntable (200) and clamped by a fixture (240) in the barrel (100) and immersed in the abrasive in the barrel. While the parts (500) are rotated around the axis (501) of the parts by the fixture, the abrasive in the barrel flows along with the rotation of the barrel so that the abrasive passes through the bell mouth (261) and impacts the outer surface of the parts.

6. The method and apparatus for grinding and polishing shaft-type rotating parts according to claim 5, characterized in that: The barrel (100) is rotated and the rotation direction of the barrel is opposite to the rotation direction of the turntable (200).

7. Equipment for grinding and polishing shaft-type rotating parts, characterized by include: A barrel (100) for containing abrasives; The turntable (200) is configured to be rotatable around the turntable axis (201) and to be movable up and down along the turntable axis (201) and to be fixed in position, and the turntable (200) can be immersed in the barrel (100) when moving downward along the turntable axis (201); A fixture (240) for clamping a part (500) and rotating the part, which is disposed on the turntable (200); The flow guide member (260) is arranged on the rotating disk (200) and forms a bell mouth (261), the opening (262) of the bell mouth faces radially outward, and the inner end of the bell mouth forms an inlet (263) facing the part. The flow guide member (260) is used to guide the abrasive to impact the outer surface of the part through the bell mouth (261) to increase the pressure and flow density impacting the outer surface of the part.

8. The device according to claim 7, characterized in that: The turntable (200) comprises an upper turntable (210) and a lower turntable (220), wherein the upper turntable (210) is configured to move up and down along a turntable axis (201) relative to the lower turntable (220) and to be fixed in position; The clamp (240) includes a positioning device (241) and a clamping device (242). The positioning device (241) is arranged on the lower turntable (220) and faces the upper turntable (210). The clamping device (241) is arranged on the upper turntable (210) and faces the lower turntable (220). The positioning device (241) and the clamping device (242) are axially aligned to each other so as to axially clamp the part (500) therebetween. The clamping device (242) is rotated by the rotating shaft (250).

9. The device according to claim 8, characterized in that: There are multiple clamps (240) and rotating shafts (250) distributed in a circumference on the rotating disk (200), and the rotating shafts (250) are configured to rotate in any of the following ways: (1) The plurality of rotating shafts (250) are driven to rotate synchronously by a sprocket drive system or a belt drive system; (2) Each of the rotating shafts (250) is driven to rotate directly or indirectly by a motor.

10. The device according to claim 8, characterized in that: The turntable (200) includes a middle turntable (230), the upper turntable (210) is configured to move up and down along the turntable axis (201) relative to the middle turntable (230) and to be fixed in position, and the middle turntable (230) is configured to move up and down along the turntable axis (201) relative to the lower turntable (220) and to be fixed in position; the clamp (240) includes a connecting shaft (243) configured on the middle turntable (230), the connecting shaft (243) corresponds axially to the positioning device (241) and the clamping device (242) one by one, and the connecting shaft (243) is used to axially clamp the part between the positioning device (241) and the connecting shaft (243) and between the clamping device (242) and the connecting shaft (243) to position the part (500) and transmit torque.

11. The device according to any one of claims 7 to 10, characterized in that: The projection profile of the guide member (260) along the axial direction of the rotating disk (200) presents a single shape or a composite shape.

12. The device according to any one of claims 7 to 10, characterized in that: The flow guide members (260) are inclined in a tangential direction on the rotating disk and define a bell mouth (262) also inclined in a tangential direction between two adjacent flow guide members. The inlet (263) is defined by any of the following methods: (1) The inlet (263) is defined by two adjacent flow guiding members (260) at the radial inner end of one flow guiding member and the middle portion of the other flow guiding member; (2) the inlet (263) is defined between a radial inner end of a flow guide member (260) and a retaining ring (270); (3) The inlet (263) is defined between the radial inner ends of the two flow guide members (260) arranged in a pair.

13. The device according to any one of claims 7 to 10, characterized in that: The barrel (100) and the turntable (200) each include at least two barrels, the barrel (100) and the turntable (200) are distributed on the same circumference, and a column (300) is arranged at the center of the circumference; the turntable (200) is arranged to be lifted and rotated by the column (300) so as to turn the turntable to a corresponding barrel position as required and place it in the corresponding barrel and remove it from the barrel.

14. The device according to claim 13, characterized in that: At least two of the barrels (100) are independent of each other or combined together, and a corridor container (400) is configured for the barrel position.

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