A device for high-precision adaptive grinding of a swash plate

Abstract

The present invention discloses a device for high-precision adaptive grinding of an inclined disc, which relates to the technical field of grinding devices, and is used to solve the technical problem that traditional high-precision grinding will have adverse effects on the operator's body and the environment, and is not conducive to on-site production safety management. Among them: a pressure device, a grinding device and a grinding platform are distributed in the upper, middle and lower parts of the space of a three-axis manipulator, the pressure device and the grinding device move synchronously, a plurality of inclined discs to be ground are installed in the grinding device, the pressure device provides pressure for the grinding device, the inclined disc to be ground contacts the grinding platform under the drive of the grinding device, and the three-axis manipulator drives the pressure device and the grinding device to move in a plane according to a preset trajectory to grind the inclined disc to be ground. The above-mentioned device for high-precision adaptive grinding of inclined discs has a simple structure, is easy to use, can process and grind a plurality of inclined discs at the same time, improves the processing efficiency, is safer and more reliable to use, and has high practicality.

Description

Technical Field

[0001] The invention relates to the technical field of grinding devices, and in particular to a device for high-precision adaptive grinding of a swash plate. Background Art

[0002] Traditional high-precision grinding is done manually by experienced masters with many years of grinding experience. The traditional manual method has high labor intensity, long production cycle, long-term occupation of workers and site resources during production, resulting in production resource conflicts and low processing efficiency. In addition, the grinding precision of the inclined plate is high, and the flatness requirement is 0.003, which requires special grinding by a dedicated person. When sand grinding the inclined plate, auxiliary materials such as grinding paste, kerosene, engine oil and gasoline are required. The above auxiliary materials are harmful to the operator's body. In the past, traditional sand grinding sites were open environments, and the unprotected working environment had a certain impact on the inclined plate and the surrounding environment, and was not conducive to on-site production safety management. Summary of the invention

[0003] The purpose of the present invention is to provide a device for high-precision adaptive grinding of an inclined plate, so as to solve the technical problem that traditional high-precision grinding requires specialized personnel, and manual grinding will have adverse effects on the operator's body and the environment, which is not conducive to on-site production safety management.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] Provided is a device for high-precision adaptive grinding of a swash plate, comprising a three-axis manipulator, a pressure device, a grinding platform and a grinding device;

[0006] The pressure device, the grinding platform and the grinding device are all installed on the three-axis manipulator. The pressure device, the grinding device and the grinding platform are distributed in space along the upper, middle and lower sides. The pressure device moves synchronously with the grinding device. A plurality of inclined plates to be ground are installed in the grinding device. The pressure device provides pressure for the grinding device. The inclined plates to be ground are contacted with the grinding platform under the drive of the grinding device. The three-axis manipulator drives the pressure device and the grinding device to move along a preset trajectory in a plane to grind the inclined plates to be ground.

[0007] The device for high-precision adaptive grinding of the inclined disk provided by the present invention is effectively designed to eliminate the lateral force that is easily generated when grinding several inclined disks at the same time, so that the friction force on each inclined disk is uniform; the grinding marks can be well eliminated after the inclined disk is ground, and under the premise of ensuring the grinding quality, the grinding machine tool can grind at least 3 inclined disks at a time in a shorter time, which greatly improves the efficiency and breaks through the original technical bottleneck of grinding by special personnel. The quality of the inclined disk after machine tool grinding is basically consistent with manual grinding, which can meet the process requirements. At the same time, it reduces the labor intensity of the processor, reduces the harm to the body caused by organic solvents such as kerosene and gasoline, improves the processing environment, and improves the safety of on-site production. The above-mentioned device for high-precision adaptive grinding of the inclined disk has a simple structure, is easy to use, can process and grind multiple inclined disks at the same time, improves the processing efficiency, is safer and more reliable to use, and has high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0009] Figure 1 A side view of a device for high-precision adaptive grinding of a swash plate provided by the present invention;

[0010] Figure 2 for Figure 1 A top view of a device for high-precision adaptive grinding of a swash plate;

[0011] Figure 3 for Figure 1 Schematic diagram of the structure of the medium grinding tooling;

[0012] Figure 4 for Figure 3 Partial cross-section of the grinding tool;

[0013] Figure 5 for Figure 1 Schematic diagram of the intermediate pressure block.

[0014] Reference numerals:

[0015] 1- pad, 2- elastic block, 3- pressure plate, 4- pressure block, 5- tooling push plate, 6- rigid ball head, 7- three-axis manipulator, 8- pressure device, 9- thrust frame, 10- fixture, 11- fixed force application point 11. DETAILED DESCRIPTION

[0016] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0017] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0018] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0019] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying 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 a limitation on the present invention.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Taking the front and rear swash plates of the pump series as an example, we explored the grinding and processing of similar swash plates on special equipment and ground multiple swash plates at a time. The problems of large annual batches and quantities of the front and rear swash plates of the pump series, high hardness of the swash plates and difficulty in chip removal during grinding seriously restricted the company's production. The high labor intensity of workers and the harm to workers and the environment caused by the large amount of organic solvents used in the grinding process were also urgent problems to be solved.

[0022] The front and rear swash plates are small and of special shape, which are quite different from the specially ground large shell structure. In order to grind multiple small swash plates at one time and solve the problem of grinding multiple swash plates with one force head, it is necessary to redesign the "tooling push plate 5" and "press-fit interface" structures to make the force stable and balanced.

[0023] Difficulties in the design of the grinding "tooling push plate 5" and "press-fit interface" structures:

[0024] ① One force head drives multiple inclined plates for grinding. The height difference of the inclined plates can easily cause the pressure block 4 to tilt. With a large inclination, the inclined plates are affected by the lateral force and are prone to unstable pressure during grinding. ② The step surface of the inclined plate is irregular, and there is no three-point force application surface parallel to the grinding surface. ③ Since the inclined plate is small and has high precision, it is easy to rotate when applying force to the inclined surface. From the analysis of the speed direction, the change of the pressure center will make the inclined plate grinding unstable.

[0025] The purpose of this application is to break through the bottleneck of the original grinding technology of dedicated personnel, improve production efficiency, and process the inclined plate in CNC grinding equipment to solve the problem that one force head drives multiple inclined plates to grind at the same time, and the friction force is uneven during grinding due to the height difference and center error, and the inclined plate is susceptible to lateral force. The surface roughness requirement of Ra0.2 and the flatness requirement of 0.003 are achieved.

[0026] See Figure 1 and Figure 2 As shown, the device for high-precision adaptive grinding of a swash plate provided by the present invention comprises a three-axis manipulator, a pressure device 8, a grinding platform and a grinding device;

[0027] The pressure device 8, the grinding platform and the grinding device are all installed on the three-axis manipulator. The pressure device 8, the grinding device and the grinding platform are distributed in space along the upper, middle and lower edges. The pressure device 8 moves synchronously with the grinding device. A plurality of inclined disks to be ground are installed in the grinding device. The pressure device 8 provides pressure for the grinding device. The inclined disk to be ground contacts the grinding platform under the drive of the grinding device. The three-axis manipulator drives the pressure device 8 and the grinding device to move along a preset trajectory in the plane to grind the inclined disk to be ground.

[0028] When implementing:

[0029] Device for high-precision adaptive grinding of swash plates (see Figure 1), three sets of double-track slides with servo motors are used to form a three-axis manipulator, the grinding platform is placed horizontally, the horizontal movement range of the manipulator is larger than the range of the grinding platform, the thrust frame 9 and the pressure device 8 (the pressure device 8 can be selected as a controllable variable pressure cylinder) are installed on the manipulator, the grinding tool is placed in the fixture 10, and the fixture 10 is placed in the thrust frame 9. The fixed force application point 11 on the thrust frame 9 limits the free movement of the fixture 10 in the horizontal direction. The controllable variable pressure cylinder applies pressure perpendicular to the grinding surface to the inclined plate, and the industrial computer programming is used to control the grinding trajectory, grinding speed, trajectory position change and pressure size.

[0030] According to the structural characteristics of the swash plate, the "tool push plate 5" and "press-fit interface" devices are designed and manufactured. Based on the principle of three points forming a plane, at least three swash plates are clamped and ground at one time. The "press-fit interface" ensures that the three swash plates pushed by the "tool push plate 5" and the corresponding three force application positions are accurately and reliably positioned. By determining the gap between the "tool push plate 5" and the swash plate and the force application position, it is avoided that several swash plates are subjected to lateral force due to uneven friction. When a force application head applies force downward, the three "press-fit interface" connections cannot float and be blocked. If blocked, the overall height error will affect the simultaneous flatness of the three swash plates on the grinding platform. When several swash plates are grinding at the same time, in order to ensure the quality of the swash plates and the stability of the platform, no large impulse can be transmitted to the swash plates and the grinding platform, so that the uneven force on the several swash plates causes inconsistent grinding. The final test parameters such as pressure, speed, time and grinding trajectory can achieve pressure matching with manual grinding pressure, so that the grinding quality can meet the process requirements and achieve surface roughness Ra0.2 and flatness 0.003.

[0031] The force-applying part of the "rigid ball head" (the contact position of the controllable variable-pressure cylinder grinding tool) of the CNC grinding equipment is synchronized with the "tool push plate 5", and the swash plate is synchronized with the force-applying head in the "tool push plate 5". The equipment applies force to the "rigid ball head", and the freely rolling rigid ball head transmits the pressure to the pressure plate 3 through the pad 1, and transmits the pressure to the elastic block 2 through the pressure plate 3, and transmits it to each pressure block 4 through the elastic block 2, and positions each pressure block 4 through the elastic block 2, and finally transmits it to each swash plate through the pressure block 4. At this time, each swash plate moves synchronously with the force-applying part of the "rigid ball head" of the equipment in the tool push plate 5, so that multiple swash plates can be ground according to the set trajectory on the grinding platform.

[0032] The tool push plate 5 pushes the outer circle of the swash plate. There is a suitable double-sided clearance of 0.5mm between the swash plate and the tool push plate 5. The swash plate moves freely relative to the tool push plate 5, and the friction force will not lag, which can eliminate the lateral force during movement. The pressure block 4 in contact with the swash plate is pressed on the inclined step circular surface close to the grinding surface. The swash plate and the pressure block 4 cooperate with a double-sided clearance of 0.08mm, and the center of the pressure block 4 is consistent with the center of the swash plate. The swash plate and the pressure block 4 are connected by a movable pin to prevent the swash plate from rotating during movement and to avoid the change of the pressure center causing unstable grinding of the swash plate. The pressure block 4 is made of non-metallic materials such as aluminum or beryllium bronze to protect the swash plate from being damaged.

[0033] The pressure block 4 is connected to the pressure plate 3 through the elastic block 2. The elastic block 2 is pressed together with the pressure block 4 and the pressure plate 3 to ensure accurate and reliable upper and lower positioning. The floating connection enables several inclined plates to be automatically leveled during grinding, and the inclined plates are ground together with the grinding platform at the same time. The force point adapter is a flexible structure to avoid large impulses being transmitted to the inclined plate and the grinding platform, ensuring the stability of the platform and the stable force on the inclined plate. After testing the material and size of the elastic block 2, the material is pressed with 5080 rubber. The elastic block 2 of sufficient strength ensures the verticality of the central axis to the grinding platform, and its elastic potential energy can well compensate for the height difference of the inclined plate.

[0034] A backing plate 1 is added between the "steel ball head" and the pressure plate 3, and the backing plate 1 has high hardness and a surface roughness of Ra0.8 or above. This avoids long-term contact with the pressure pit during grinding, hinders the floating of the swash plate, and eliminates the lateral force of the swash plate during grinding.

[0035] The device for high-precision adaptive grinding of the inclined disk provided by the present invention is effectively designed to eliminate the lateral force that is easily generated when grinding several inclined disks at the same time, so that the friction force on each inclined disk is uniform; the grinding marks can be well eliminated after the inclined disk is ground, and under the premise of ensuring the grinding quality, the grinding machine tool can grind at least 3 inclined disks at a time in a shorter time, which greatly improves the efficiency and breaks through the original technical bottleneck of grinding by special personnel. The quality of the inclined disk after machine tool grinding is basically consistent with manual grinding, which can meet the process requirements. At the same time, it reduces the labor intensity of the processor, reduces the harm to the body caused by organic solvents such as kerosene and gasoline, improves the processing environment, and improves the safety of on-site production. The above-mentioned device for high-precision adaptive grinding of the inclined disk has a simple structure, is easy to use, can process and grind multiple inclined disks at the same time, improves the processing efficiency, is safer and more reliable to use, and has high practicality.

[0036] As an implementable embodiment, the grinding device includes a thrust frame 9, a clamp 10 and a grinding tool; the thrust frame 9 is installed on a three-axis manipulator, the pressure device 8 faces the thrust frame 9, the thrust frame 9 is provided with an installation groove running through from top to bottom, the clamp 10 is installed in the installation groove, the grinding tool is installed in the clamp 10, the grinding end of the grinding tool passes through the installation groove, the fixed end of the grinding tool is located outside the installation groove, and the pressure device 8 applies pressure to the grinding tool.

[0037] The thrust frame 9 can better accommodate the clamp 10, and the clamp 10 can better transmit the force to the grinding tool through the force application point, and the three-axis manipulator drives the grinding tool and the pressure device 8 to move synchronously. The grinding end of the grinding tool passes through the installation slot, so that the inclined plate to be ground can contact the grinding platform to achieve the grinding of the inclined plate.

[0038] As an implementable embodiment, the grinding tool includes a pressure plate 3, a tool push plate 5 and a plurality of elastic mounting parts; one end of the elastic mounting part is mounted on the pressure plate 3, a plurality of through holes are provided on the tool push plate 5, and the inclined plate to be ground is mounted on the other end of the elastic mounting part and is located in the corresponding through hole.

[0039] The through hole on the tooling push plate 5 can accommodate multiple swash plates at the same time. It realizes the grinding of multiple swash plates at the same time, improves the grinding efficiency, and the elastic mounting parts ensure accurate and reliable positioning up and down. The floating connection of the elastic mounting parts enables several swash plates to be automatically leveled during grinding, and the swash plates are ground together with the grinding platform at the same time. The force application point adapter is a flexible structure, which avoids large impulses from being transmitted to the swash plate and the grinding platform, ensuring the stability of the platform and the stable force on the swash plate.

[0040] As an implementable embodiment, the elastic mounting member includes an elastic block 2 and a pressing block 4; the elastic block 2 is mounted on the pressing plate 3, the fixed end of the pressing block 4 is mounted on the elastic block 2, and the inclined plate to be ground is mounted on the free end of the pressing block 4.

[0041] The elastic block 2 and the pressure block 4 ensure accurate and reliable upper and lower positioning. The floating connection realized by the elastic block 2 enables several inclined plates to be automatically leveled during grinding, and the inclined plates are ground together with the grinding platform at the same time. The force application point adapter is a flexible structure, which avoids large impulses from being transmitted to the inclined plate and the grinding platform, ensuring the stability of the platform and the stable force on the inclined plate.

[0042] As an implementation method, the pressing block 4 is a T-shaped structure, the free end of the pressing block 4 is located in the through hole, a first preset gap is set between the free end and the inner wall of the through hole, the fixed end of the pressing block 4 is located outside the through hole, and the diameter of the fixed end of the pressing block 4 is larger than the inner diameter of the through hole.

[0043] The diameter of the fixed end of the pressure block 4 is larger than the inner diameter of the through hole, which ensures the pressure transmission effect of the pressure block 4, avoids excessive grinding of the swash plate, and ensures the grinding effect. The setting of the first preset gap cooperates with the elastic material to solve the influence of the overall height error caused by the center error of the swash plates when the downward force is applied to the several swash plates, so that the several swash plates can float flexibly up and down and left and right, and the swash plates can be automatically leveled during grinding. The force transfer of the elastic block 2 is an elastic structure, and the elastic potential energy can well compensate for the difference between the swash plates, ensuring the smooth transmission of force during grinding, so that the swash plates are evenly and stably stressed.

[0044] As an implementable embodiment, a mounting hole is provided at the free end of the pressing block 4 , and the inclined plate to be ground is mounted in the mounting hole, and the center line of the mounting hole is inclined toward the pressure device 8 .

[0045] The arrangement of the mounting hole facilitates the installation of the swash plate, and the center line of the mounting hole is inclined toward the pressure device 8, so that the surface to be ground of the swash plate is in contact with the grinding platform.

[0046] As an implementable embodiment, a second preset gap is set between the mounting end of the inclined plate to be ground and the inner wall of the mounting hole. The mounting end of the inclined plate to be ground is movably installed in the mounting hole of the pressure block 4 through a pin shaft, and the inclined plate to be ground moves within the range of the mounting hole.

[0047] To eliminate the lateral force that is easily generated when grinding several swash plates at the same time, a special elastic compensation pad is used to make the friction force on each swash plate uniform; the grinding marks can be well eliminated after the swash plate is ground, and the quality of the swash plate after machine grinding is consistent with that of manual grinding. The swash plate and the pressure block 4 are connected by a movable pin to prevent the swash plate from rotating during movement and to avoid the change of the pressure center causing unstable grinding of the swash plate. The pressure block 4 is made of non-metallic materials such as aluminum or beryllium bronze to protect the swash plate from being damaged.

[0048] As an implementable embodiment, the tooling push plate 5 is a T-shaped structure, the grinding end of the tooling push plate 5 passes through the mounting groove, and the fixed end of the tooling push plate 5 is located outside the mounting groove on the thrust frame 9.

[0049] The installation effect of the tooling push plate 5 in the fixture 10 is ensured, and the transmission effect of the downward pressure of the pressure device 8 is also ensured.

[0050] As an implementable embodiment, the cross section of the tooling push plate 5 is circular, and the plurality of through holes are evenly distributed along the center line of the tooling push plate 5 .

[0051] Multiple through holes are evenly arranged to ensure that multiple inclined plates are evenly stressed and have the same grinding effect.

[0052] As an implementable embodiment, the grinding tool includes a pad 1, and the pad 1 is located on the pressure plate 3. When the pressure device 8 applies pressure to the grinding device, the rigid ball head 6 of the pressure device 8 is against the pad 1.

[0053] The backing plate 1 ensures the transmission effect of the pressure applied by the pressure device 8. The backing plate 1 has high hardness and a surface roughness of Ra0.8 or above. It avoids long-term contact with the pressure pit during the grinding process, hinders the floating of the parts, and eliminates the lateral force of the parts during grinding.

[0054] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0055] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A device for high-precision adaptive grinding of a swash plate, characterized in that: It includes a three-axis manipulator, a pressure device, a grinding platform and a grinding device; The pressure device, the grinding platform and the grinding device are all installed on the three-axis manipulator. The pressure device, the grinding device and the grinding platform are spatially distributed along the upper, middle and lower sides. The pressure device moves synchronously with the grinding device. A plurality of inclined plates to be ground are installed in the grinding device. The pressure device provides pressure for the grinding device. The inclined plates to be ground are contacted with the grinding platform under the drive of the grinding device. The three-axis manipulator drives the pressure device and the grinding device to move along a preset trajectory in a plane to grind the inclined plates to be ground. in, The grinding device comprises a thrust frame, a fixture and a grinding tool, wherein the thrust frame is mounted on the three-axis manipulator, the pressure device faces the thrust frame, a mounting groove penetrating from top to bottom is provided on the thrust frame, the fixture is mounted in the mounting groove, the grinding tool is mounted in the fixture, the grinding end of the grinding tool passes through the mounting groove, the fixed end of the grinding device is located outside the mounting groove, and the pressure device applies pressure to the grinding tool; The grinding tool comprises a pressing plate, a tool push plate and a plurality of elastic mounting members, one end of the elastic mounting member is mounted on the pressing plate, a plurality of through holes are arranged on the tool push plate, and the inclined plate to be ground is mounted on the other end of the elastic mounting member and is located in the corresponding through holes; The elastic mounting component includes an elastic block and a pressing block, wherein the elastic block is mounted on the pressing plate, the elastic block is pressed with 5080 rubber, the fixed end of the pressing block is mounted on the elastic block, the inclined plate to be ground is mounted on the free end of the pressing block, the inclined plate and the pressing block are connected with a movable pin, the pressing block is a T-shaped structure, the free end of the pressing block is located in the through hole, a first preset gap is provided between the free end and the inner side wall of the through hole, the fixed end of the pressing block is located on the outside of the through hole, and the diameter of the fixed end of the pressing block is greater than the inner diameter of the through hole.

2. The device for high-precision adaptive grinding of a swash plate according to claim 1, characterized in that: The free end of the pressing block is provided with a mounting hole, the inclined plate to be ground is mounted in the mounting hole, and the center line of the mounting hole is inclined toward the pressure device.

3. The device for high-precision adaptive grinding of a swash plate according to claim 2, characterized in that: A second preset gap is provided between the mounting end of the swash plate to be ground and the inner wall of the mounting hole. The mounting end of the swash plate to be ground is movably mounted in the mounting hole of the pressing block through a pin shaft, and the swash plate to be ground moves within the range of the mounting hole.

4. The device for high-precision adaptive grinding of a swash plate according to claim 1, characterized in that: The tooling push plate is a T-shaped structure, the grinding end of the tooling push plate passes through the mounting groove, and the fixed end of the tooling push plate is located outside the mounting groove on the thrust frame.

5. The device for high-precision adaptive grinding of a swash plate according to claim 1, characterized in that: The cross section of the tooling push plate is circular, and the plurality of through holes are evenly distributed along the center line of the tooling push plate.

6. The device for high-precision adaptive grinding of a swash plate according to claim 1, characterized in that: The grinding tool comprises a pad, which is located on the pressure plate. When the pressure device applies pressure to the grinding device, the rigid ball head of the pressure device abuts against the pad.

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