Internal and external taper pipe nozzle automatic grinding equipment with force feedback
By designing an automatic grinding equipment for internal and external conical nozzles with force feedback, efficient and precise grinding of multi-station and multi-specification products has been achieved, solving the problems of poor consistency and insufficient equipment adaptability in traditional manual grinding, and improving product quality and production efficiency.
Patent Information
- Application Number
- CN202511496127.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-20
- Publication Date
- 2025-12-12
AI Technical Summary
Traditional manual grinding methods result in high labor intensity for workers and poor grinding consistency, making it difficult to meet the quality and efficiency requirements of multi-variety, small-batch products. Furthermore, existing equipment cannot effectively solve the problem of alignment between the shaft and the product nozzle.
Design an automatic grinding equipment for internal and external conical nozzles with force feedback. It adopts a multi-station design and can grind different types and specifications of products simultaneously. The grinding force is monitored in real time by a force sensor, and the grinding speed and force are precisely controlled to achieve continuous grinding in one direction or forward and reverse grinding. It supports independent control of multiple stations.
It improves the consistency and efficiency of grinding quality, reduces the labor intensity of workers, meets the grinding needs of multiple varieties and small batches of products, and ensures the stability of grinding accuracy and product quality.
Smart Images
Figure CN121104881A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of automatic grinding technology for internal and external tapered nozzles. It is a device developed to meet the needs of new manufacturing, repair, and rework grinding of various types and specifications of products containing internal and external tapered nozzle joints. It is applicable to various nozzle joint products with different degrees of internal and external tapering, such as valves, radiators, and oil tanks, effectively improving the quality and efficiency of new manufacturing, repair, and rework. It can also be used for new manufacturing, repair, and rework grinding of products containing internal and external tapered nozzle joints in other industries. Background Technology
[0002] For the maintenance of valves, radiators, oil tanks, and other products with diverse product types and large production volumes, the traditional grinding method—manually grinding the outer or inner conical surface of the connector with a grinding head—has many drawbacks: high labor intensity for workers, inconsistent grinding techniques among operators, and significant variations in grinding time and post-grinding color inspection pass rate for individual nozzles. Grinding time ranges from approximately 30 to 90 minutes, and a one-time pass cannot be guaranteed, resulting in poor consistency. This is because manual grinding cannot ensure the concentricity of the grinding head and nozzle, and the grinding force relies on individual feel. Especially for products with severely damaged nozzles, even after multiple manual grinding attempts, the color inspection may fail, rendering the nozzle unusable. This necessitates cutting off the nozzle and re-welding a new one, extending product delivery cycles and failing to meet customer needs.
[0003] In the industry, attempts were made to use a drilling machine and tooling to grind the product nozzles. However, the problem of aligning the shaft and the product nozzle was difficult to solve effectively, and the nozzle taper was prone to being ground off-center. This grinding method could not meet the process requirements.
[0004] With the increasing number of repair tasks and customers demanding shorter turnaround times and higher quality, there is an urgent need for a new type of grinding equipment. This invention aims to address this challenge by implementing automated grinding equipment, reducing worker workload, standardizing nozzle grinding processes, and digitizing and formulating nozzle grinding process parameters, thereby improving the efficiency and quality of repairing products with nozzles. Summary of the Invention
[0005] To address the aforementioned issues and improve the quality and efficiency of product repair and rework for multi-variety, small-batch products containing internal and external tapered nozzles, a multi-station equipment capable of simultaneously grinding internal and external tapered nozzles of different types and specifications has been developed. Specific objectives are as follows: 1) Achieve flexible grinding: to meet the grinding needs of different types of nozzles and improve the adaptability and flexibility of the grinding process.
[0006] 2) Adaptable to nozzle grinding of various types and specifications: It can effectively handle the grinding tasks of various types and specifications of nozzles, ensuring the versatility and applicability of the equipment.
[0007] 3) Control of different grinding speeds: Precisely control the grinding speed according to different nozzle materials and grinding requirements to achieve the best grinding effect and improve grinding efficiency and quality.
[0008] 4) Achieve control of different grinding forces: The grinding force is monitored in real time by a force sensor and the magnitude of the grinding force is precisely controlled to avoid damage to the nozzle caused by excessive or insufficient grinding force, thus ensuring grinding accuracy.
[0009] 5) Unidirectional continuous grinding and forward / reverse grinding are available: Depending on the requirements of different grinding processes, flexible selection is possible, enhancing the controllability and versatility of the grinding process.
[0010] 6) Enables independent control of multi-station grinding operations: Multiple stations can operate independently without interfering with each other, enabling simultaneous grinding of multiple nozzles, improving grinding efficiency and meeting the high-efficiency needs of maintenance and production.
[0011] The technical solution of this invention is as follows: To achieve the above-mentioned objective, this invention designs an automatic grinding device for inner and outer conical nozzles with force feedback. It includes an automated grinding platform with multiple grinding stations. An inner or outer conical grinding device is connected to any independent station. A start button and a stop button on the panel are used to start or stop the inner or outer conical grinding device. A force sensor plug on the inner or outer conical grinding device is connected to a force sensor socket on the panel. A stepper motor plug on the inner or outer conical grinding device is connected to a motor socket on the panel. The device also includes an integrated machine with a built-in product grinding program and a human-machine interface window. Grinding parameters such as grinding time, forward and reverse grinding, continuous grinding, grinding speed, and grinding force can be set according to the product and directly accessed.
[0012] Furthermore, the internal cone grinding device consists of a stepper motor, a motor mounting flange, a grinding sleeve, a split slip ring, a bushing, a thin-walled bearing, a cylindrical silicone rubber, an internal cone grinding head, an internal cone nozzle, a force sensor, a viewing window, a miniature aviation socket, and a miniature aviation plug. The stepper motor is mounted on the grinding sleeve via a motor mounting flange. The motor mounting flange and the grinding sleeve are designed as separate structures. The stepper motor's output wires are designed as plugs, which are plugged into the motor socket on the equipment panel to drive the stepper motor. The bottom of the grinding sleeve is machined with an internal thread that matches the thread of the grinding nozzle. The entire grinding device is directly screwed onto the nozzle product to be ground for grinding. The split slip ring is designed in two parts: a fixed end and a moving end. The fixed end is installed on the grinding sleeve, and the moving end of the split slip ring is installed on the bushing and rotates synchronously with the stepper motor. One end of the bushing is mounted on the shaft of the stepper motor, and the other end is used to mount the force sensor. The output wire of the force sensor is connected to the fixed end of the split slip ring, and the moving end of the split slip ring is connected to the miniature aviation socket by wires to complete the signal output of the force sensor. The outer ring of the thin-walled bearing is fixed on the grinding sleeve, and the bushing is installed on the inner ring of the thin-walled bearing to ensure the concentricity of the stepper motor and the inner conical nozzle, prevent the axis from swaying when the grinding device rotates, and ensure that the inner conical surface of the inner conical nozzle is not ground off-center. The upper end face of the cylindrical silicone is in close contact with the lower end face of the force sensor and is installed together in the bushing. The lower end face of the cylindrical silicone is in close contact with the inner conical grinding head. The flexible characteristics of the cylindrical silicone allow it to press against the inner conical grinding head and cause the inner conical grinding head to rotate together through friction to complete the grinding work. In addition, the flexible characteristics of the cylindrical silicone also realize the shock absorption function when the inner conical grinding head and the inner conical nozzle contact surface grind against each other. The force sensor's output wire connects to the moving end of the split slip ring, and the output wire connects to the miniature aviation socket through the fixed end of the split slip ring. After the miniature aviation socket and the miniature aviation plug are plugged in, the miniature aviation plug connects to the force sensor socket on the device panel to complete the power supply and signal output of the force sensor.
[0013] Furthermore, the outer cone grinding device is designed such that the inner cone grinding head of the inner cone grinding device is adapted to the outer cone nozzle as an outer cone grinding head.
[0014] Furthermore, the cylindrical silicone sealant presses against the grinding head, and through friction, the grinding head rotates synchronously with the motor shaft, achieving a vibration reduction function during the grinding process between the grinding head and the nozzle. This effectively reduces the damage to the nozzle and grinding head caused by vibration during the grinding process. The silicone sealant is formulated with liquid A and B silicone liquids, allowing for the selection of silicone sealant with different hardness according to different grinding requirements.
[0015] Furthermore, the miniature pressure sensor monitors the grinding force, tracks the grinding intensity in real time, and accurately feeds the grinding force data back to the control system, providing a basis for the standardization and digitalization of grinding operations.
[0016] Furthermore, the pressure sensor signal lead-out features a separate slip ring design, cleverly solving the problem of wire tangling when the force sensor and motor rotate synchronously. This avoids wire breakage due to tangling, preventing signal transmission interruption or damage to the force detection device. This ensures stable and reliable signal transmission.
[0017] Furthermore, the grinding sleeve and motor flange are designed as separate units, which facilitates installation, maintenance, and disassembly.
[0018] Furthermore, the inner cone grinding head is machined into an outer cone surface, and an appropriate amount of grinding paste is added between the outer cone surface of the inner cone grinding head and the inner cone surface of the inner cone nozzle. With the grinding action of the grinding paste, the grinding effect of the grinding surface is improved.
[0019] Furthermore, the grinding sleeve features a transparent design, allowing real-time monitoring of the nozzle's grinding operation. Operators can promptly identify any abnormalities during the grinding process and adjust grinding parameters or take appropriate measures accordingly.
[0020] Furthermore, the bushing uses a thin-walled bearing installed between the grinding sleeves to ensure that the concentricity of the stepper motor and the nozzle is consistent when the stepper motor is running, thus avoiding nozzle misalignment caused by concentricity deviation.
[0021] The technical effects of this invention are as follows: This invention achieves real-time and precise monitoring of grinding force through a miniature pressure sensor integrated into the grinding device, and digitizes and formula-manages grinding process parameters. Based on the product model, it calls upon the corresponding grinding process parameter formula, including key parameters such as grinding time, forward and reverse rotation time, grinding speed, and grinding force, achieving numerical control of grinding process parameters. This leads to standardization of the grinding process, significantly improving the consistency of grinding quality and ensuring the stability and reliability of product quality. It also improves grinding efficiency. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of an automatic grinding device for internal and external conical nozzles with force feedback. It consists of a stand 1, a start button 2, a stop button 3, an all-in-one machine 4, a light switch 5, a main power switch 6, a five-hole socket 7, a force sensor socket 8, a motor socket 9, an inner cone grinding device 10, the product 11, and an outer cone grinding device 12.
[0023] Figure 2 This is a schematic diagram of an internal cone grinding device. Figure 3 This is a schematic diagram of an external cone grinding device; Figure 4 shows the outer cone nozzle of the radiator being ground using an outer cone grinding device. Figure 5 shows the external cone grinding device used to grind the external cone nozzle at the inlet of the hand pump. Figure 6 shows the outer cone nozzle at the inlet of the grinding filter of the outer cone grinding device; Figure 7 shows the inner cone nozzle at the outlet of the hand valve of the inner cone grinding device. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0025] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention.
[0026] This invention is by no means limited to any specific setup and method presented below, but covers any improvements, substitutions, and modifications to the structure, method, and device without departing from the spirit of the invention. Well-known structures and techniques are not shown in the accompanying drawings and the following description to avoid unnecessarily obscuring the invention.
[0027] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited in each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0028] Figure 1 This is a schematic diagram of an automatic grinding device for inner and outer conical nozzles with a force sensor according to an embodiment of the present invention. The invention is designed with 4 workstations, each connected to an inner conical grinding device 10 or an outer conical grinding device 12. A start button 2 is provided on the panel to start the inner conical grinding device 10 or the outer conical grinding device 12, and a stop button 3 is provided to stop the inner conical grinding device 10 or the outer conical grinding device 12. The force sensor plug on the inner conical grinding device 10 or the outer conical grinding device 12 is connected to the force sensor socket 8 on the panel. The stepper motor plug on the inner conical grinding device 10 or the outer conical grinding device 12 is connected to the motor socket 9 on the panel. The integrated machine 4 has a product grinding program with various settings and a user-friendly human-machine interface window. Grinding parameters such as grinding time, forward and reverse grinding, continuous grinding, grinding time, grinding speed, and grinding force can be set according to the product and directly called up.
[0029] The grinding sleeve on the inner conical grinding device 10 or the outer conical grinding device 12 is connected to the inner and outer conical nozzles on the product via threads. When the threads are screwed in, the force sensor data on the inner conical grinding device 10 or the outer conical grinding device 12 is displayed on the integrated machine 4. The grinding force is adjusted by adjusting the depth of the screwing in.
[0030] The grinding device in the invention is divided into two types: inner conical surface grinding 10 and outer conical surface grinding 12. Depending on the type of nozzle being ground, it can also be expanded to include ball head grinding, end face grinding, and other product types.
[0031] Figure 2This is a schematic diagram of the inner cone grinding device 10 in an automatic grinding device for inner and outer cone nozzles with a force sensor according to an embodiment of the present invention.
[0032] The inner conical grinding device 10 consists of a stepper motor 111, a motor mounting flange 112, a grinding sleeve 113, a split slip ring 114, a bushing 115, a thin-walled bearing 116, a cylindrical silicone 117, an inner conical grinding head 118, an inner conical nozzle 119, a force sensor 1110, a viewing window 1111, a miniature aviation socket 1112, and a miniature aviation plug 1113.
[0033] The stepper motor 111 is mounted on the grinding sleeve 113 via the motor mounting flange 112. The motor mounting flange 112 and the grinding sleeve 113 are designed as separate units for easy installation, maintenance, and disassembly. The lead wire of the stepper motor 111 is designed as a plug, which is plugged into the motor socket 9 on the equipment panel to drive the stepper motor.
[0034] The bottom of the grinding sleeve 113 is machined with an internal thread that matches the thread of the grinding nozzle, thus connecting the entire grinding device ( Figure 2 It can be directly screwed onto the grinding nozzle 9 for grinding. The grinding sleeve 113 has a transparent design, allowing real-time observation of the product's grinding operation status.
[0035] The split slip ring 114 is designed in two parts: a fixed end and a moving end. The fixed end is mounted on the grinding sleeve 113, and the moving end of the split slip ring 114 is mounted on the bushing 115, rotating synchronously with the stepper motor 111. The design of the split slip ring 114 solves the problem of wire entanglement when the force sensor 1110 rotates together with the stepper motor 111.
[0036] One end of the bushing 115 is mounted on the shaft of the stepper motor 111, and the other end is used to mount the force sensor 1110. The output wire of the force sensor 1110 is connected to the fixed end of the split slip ring 114, and the moving end of the split slip ring 114 is connected to the miniature aviation socket 1112 by wires to complete the signal output of the force sensor 1110.
[0037] The outer ring of the thin-walled bearing 116 is fixed on the grinding sleeve 113, and the bushing 115 is installed on the inner ring of the thin-walled bearing 116 to ensure the concentricity of the stepper motor 111 and the inner conical nozzle 119, prevent the axis from swaying when the grinding device rotates, and ensure that the inner conical surface of the inner conical nozzle 119 is not ground off-center.
[0038] The upper end face of the cylindrical silicone 117 is in close contact with the lower end face of the force sensor 1110, and they are installed together inside the bushing 115. The lower end face of the cylindrical silicone 117 is in close contact with the inner conical grinding head 118. The flexible nature of the cylindrical silicone 117 allows it to press against the inner conical grinding head 118, causing the inner conical grinding head 118 to rotate together through friction, thus completing the grinding work. In addition, the flexible nature of the cylindrical silicone 117 also provides a shock absorption function when the contact surfaces of the inner conical grinding head 118 and the inner conical nozzle 119 are mutually rubbed. The inner conical grinding head 118 is machined into an outer conical surface. An appropriate amount of grinding paste is added between the outer conical surface of the inner conical grinding head 118 and the inner conical surface of the inner conical nozzle 119. With the grinding action of the grinding paste, the grinding effect of the grinding surface is better.
[0039] The output wire of the force sensor 1110 is connected to the moving end of the split slip ring 114, and the output wire of the split slip ring 114 is connected to the miniature aviation socket 1112. After the miniature aviation socket 1112 and the miniature aviation plug 1113 are plugged into each other, the miniature aviation plug 1113 is connected to the force sensor socket 8 on the device panel to complete the power supply and signal output of the force sensor.
[0040] Figure 3 This is a schematic diagram of the outer cone grinding device 12 in an automatic grinding device for inner and outer cone nozzles with a force sensor according to an embodiment of the present invention.
[0041] The external cone grinding device 12 consists of a stepper motor 111, a motor mounting flange 112, a grinding sleeve 113, a split slip ring 114, a bushing 115, a thin-walled bearing 116, a cylindrical silicone rubber 117, an external cone and internal cone grinding head 128, an external cone nozzle 129, a force sensor 1110, a viewing window 1111, a miniature aviation socket 1112, and a miniature aviation plug 1113.
[0042] The principle and structure of the outer cone grinding device 12 are the same as those of the inner cone grinding device 10. It is only necessary to design the outer cone grinding head 128 to be compatible with the outer cone nozzle 129. This will not be elaborated further here.
[0043] 5.2 Example 2 ( Figure 4 ) In an automatic grinding machine for internal and external conical nozzles with force feedback, a radiator with an external conical nozzle is connected, a formula is called, and the nozzle of the radiator is ground directly.
[0044] 5.3 Example 3 ( Figure 5 ) In an automatic grinding machine with force feedback for internal and external conical nozzles, a hand pump with an external conical nozzle is connected, the formula is called, and the nozzle of the hand pump is ground directly.
[0045] 5.4 Example 4 ( Figure 6 ) In an automatic grinding machine for internal and external conical nozzles with force feedback, a filter with an external conical nozzle is connected, a formula is called, and the nozzle of the filter is ground directly.
[0046] 5.5 Example 5 ( Figure 7 ) In an automatic grinding machine for internal and external conical nozzles with force feedback, a hand valve with an internal conical nozzle is connected, and the program is invoked to directly grind the nozzle at the outlet of the hand valve.
[0047] In some embodiments, the inner cone grinding device 10 may also design the inner cone grinding head 118 therein to match the angle of the ball head for grinding the ball joint.
[0048] In some embodiments, the outer cone grinding device 12 and the outer cone and inner cone grinding head 118 therein can be designed as a flat grinding head that matches the flat nozzle for flat grinding.
[0049] The above specific embodiments or examples are only used to explain the technical solutions of the present invention and are not intended to limit the present application. Parts not described in detail are considered to be conventional technical means or common knowledge in the field. It can be understood by those skilled in the art that, based on the design concept of the present application, the technical solutions described in the foregoing embodiments can be adapted or some or all of the technical features can be equivalently replaced. These modifications, equivalent replacements, and adaptive improvements do not depart from the technical essence of the present invention and should all be covered within the protection scope of the present application.
Claims
1. An automatic grinding device for internal and external conical nozzles with force feedback, characterized in that, An automated grinding platform is set up, with multiple grinding stations arranged on the platform. An internal or external cone grinding device is connected to any independent station. A start button is provided on the panel to start the internal or external cone grinding device, and a stop button is provided to stop the internal or external cone grinding device. The force sensor plug on the internal or external cone grinding device is connected to the force sensor socket on the panel, and the stepper motor plug on the internal or external cone grinding device is connected to the motor socket on the panel. The platform also includes an integrated machine with a built-in product grinding program and human-machine interface window, which allows users to set grinding parameters and formulas according to the product.
2. The automatic grinding equipment for internal and external conical nozzles with force feedback as described in claim 1, characterized in that, The internal cone grinding device consists of a stepper motor, a motor mounting flange, a grinding sleeve, a split slip ring, a bushing, a thin-walled bearing, a cylindrical silicone rubber, an internal cone grinding head, an internal cone nozzle, a force sensor, a viewing window, a miniature aviation socket, and a miniature aviation plug. The stepper motor is mounted on the grinding sleeve via a motor mounting flange. The motor mounting flange and the grinding sleeve are designed as separate structures. The stepper motor's output wires are designed as plugs, which are plugged into the motor socket on the equipment panel to drive the stepper motor. The bottom of the grinding sleeve is machined with an internal thread that matches the thread of the grinding nozzle. The entire grinding device is directly screwed onto the nozzle product to be ground for grinding. The split slip ring is designed in two parts: a fixed end and a moving end. The fixed end is installed on the grinding sleeve, and the moving end of the split slip ring is installed on the bushing and rotates synchronously with the stepper motor. One end of the bushing is mounted on the shaft of the stepper motor, and the other end is used to mount the force sensor. The output wire of the force sensor is connected to the fixed end of the split slip ring, and the moving end of the split slip ring is connected to the miniature aviation socket by wires to complete the signal output of the force sensor. The outer ring of the thin-walled bearing is fixed on the grinding sleeve, and the bushing is installed on the inner ring of the thin-walled bearing to ensure the concentricity of the stepper motor and the inner conical nozzle, prevent the axis from swaying when the grinding device rotates, and ensure that the inner conical surface of the inner conical nozzle is not ground off-center. The upper end face of the cylindrical silicone is in close contact with the lower end face of the force sensor and is installed together in the bushing. The lower end face of the cylindrical silicone is in close contact with the inner conical grinding head. The flexible characteristics of the cylindrical silicone allow it to be pressed together with the inner conical grinding head, and the frictional force causes the inner conical grinding head to rotate together to complete the grinding work. The force sensor's output wire connects to the moving end of the split slip ring, and the output wire connects to the miniature aviation socket through the fixed end of the split slip ring. After the miniature aviation socket and the miniature aviation plug are plugged in, the miniature aviation plug connects to the force sensor socket on the device panel to complete the power supply and signal output of the force sensor.
3. The automatic grinding equipment for internal and external conical nozzles with force feedback as described in claim 2, characterized in that, The external cone grinding device is an external cone grinding head designed to be compatible with the external cone nozzle of the internal cone grinding device.
4. The automatic grinding equipment for internal and external conical nozzles with force feedback as described in claim 2, characterized in that, The cylindrical silicone press-grinding head uses friction to make the grinding head and motor shaft rotate synchronously, thus achieving shock absorption when the grinding head and nozzle contact surfaces are grinding against each other. The silicone is prepared using liquid A and B silicone liquids, and silicone with different hardness can be selected according to different grinding needs.
5. The automatic grinding equipment for internal and external conical nozzles with force feedback as described in claim 2, characterized in that, Miniature pressure sensors monitor grinding force and real-time grinding intensity, accurately feeding the grinding force data back to the control system, providing a basis for the standardization and digitalization of grinding operations.
6. The automatic grinding equipment for internal and external conical nozzles with force feedback as described in claim 2, characterized in that, The grinding sleeve and motor flange are designed separately, which facilitates installation, maintenance and disassembly.
7. The automatic grinding equipment for internal and external conical nozzles with force feedback as described in claim 2, characterized in that, The inner cone grinding head is machined into an outer cone surface. An appropriate amount of grinding paste is added between the outer cone surface of the inner cone grinding head and the inner cone surface of the inner cone nozzle. With the grinding action of the grinding paste, the grinding effect of the grinding surface is better.
8. The automatic grinding equipment for internal and external conical nozzles with force feedback as described in claim 2, characterized in that, The grinding sleeve features a transparent design, allowing real-time monitoring of the nozzle's grinding operation.
9. The automatic grinding equipment for internal and external conical nozzles with force feedback as described in claim 2, characterized in that, The bushing uses a thin-walled bearing installed between the grinding sleeves to ensure the concentricity between the stepper motor and the nozzle when the stepper motor is running.