Proportional servo valve block machining system

Abstract

The utility model provides a proportional servo valve block machining system which comprises a machining unit and a robot material turnover unit. The robot material turnover unit is in transmission connection with the processing unit; the machining unit comprises a plurality of rotary cutting main shafts of multiple types and a plurality of main shaft tool clamps corresponding to the rotary cutting main shafts, and each rotary cutting main shaft is detachably connected with the corresponding main shaft tool clamp. A plurality of types of rotary cutting spindles include: a drilling spindle, a reaming spindle, a milling spindle, a boring spindle, and a turning spindle. By reasonably improving the structure of a machining system, the machining system is high in integrity, an existing machining mode of single-spindle machining is changed into a machining mode of multi-spindle simultaneous machining, single-piece machining circulation time is shortened, machining precision is guaranteed, and meanwhile machining efficiency is improved; the robot is used for carrying out vertical material clamping operation, the clamping reliability is improved, and the stability and durability are good; the labor intensity of workers is reduced; and the method is simple in process and low in cost and has wide popularization and application prospects.

Description

Technical Field

[0001] The utility model relates to the technical field of machining of proportional servo valves, and particularly to a machining system for a proportional servo valve block. Background Art

[0002] Due to its very high control precision and response frequency, the proportional servo valve is widely used in industrial production. It is precisely because of the excellent performance of the proportional servo valve itself that the requirements for the machining dimensions and the precision of the mating dimensions of its own machining, especially the key parts such as the spool, valve body (valve sleeve), and valve block, are also very high.

[0003] The machining of the high-performance valve block of the valve body has always been a template machining object in the machining industry, because the machining content of the high-performance valve block of the valve body almost includes all the basic machining features: precision machining holes, planes with high precision requirements, thread machining, ensuring geometric tolerances, especially the key assembly and sealing elements such as the spool hole, assembly surface, and sealing ring surface. Among them, the aperture tolerance range of the spool hole is 0.02 mm, and the roughness requirement of the sealing ring surface is Ra0.8.

[0004] At present, ordinary machining is generally used for the machining of high-performance valve blocks, and machine tools with ordinary machining precision are used. In order to ensure that the dimensional requirements of the valve block products do not exceed the tolerance, the machining parameters are often appropriately reduced. For example, the combined parameters of cutting depth or speed and feed rate. However, this will affect the machining efficiency. Therefore, the machining efficiency is reduced in order to ensure the machining quality, and the efficiency and quality cannot be taken into account at the same time. The machining cost and the cost of the valve block products will lose reasonable control invisibly.

[0005] Moreover, when the existing ordinary machining performs each process, the machine tool operator needs to perform the cumbersome operation of loading and clamping the materials up and down, with a large labor intensity.

[0006] Therefore, there is an urgent need to develop a more efficient, accurate, and convenient machining system for proportional servo valve blocks, which can improve the machining quality while ensuring the machining parameters, reduce the machining cost, and reduce the labor intensity of workers, so as to solve the above-mentioned problems existing in the existing ordinary machining. Summary of the Utility Model

[0007] In view of this, the purpose of the present utility model is to design a machining system for a proportional servo valve block. Through reasonable improvement of the machining system structure, the existing single-spindle machining is changed to a machining mode of multi-spindle simultaneous machining, which greatly shortens the single-piece machining cycle time; a robot device is used to perform the operation of loading and clamping the materials up and down, improving the clamping reliability and reducing the labor intensity of workers; and the process is simple, the cost is low, and it is conducive to popularization and application.

[0008] The utility model provides a machining system for a proportional servo valve block, including: a machining unit and a robot material turnover unit; the robot material turnover unit is connected to the machining unit for transmission, and the robot material turnover unit transfers the valve block workpiece to the machining unit;

[0009] The machining unit is the core unit of the whole system, including: multiple (preferably 30) rotating cutting spindles of multiple types and their corresponding multiple spindle tool holders. Each rotating cutting spindle is detachably and fixedly connected to the corresponding spindle tool holder. The spindle tool holder uses a Morse taper self-tightening chuck commonly used in current machining to clamp tools such as milling cutters, drills, and boring tools, and uses a common four-sided tool post in current machining to clamp turning tools and other tools.

[0010] The multiple types of rotating cutting spindles include: drilling spindles, reaming spindles, milling spindles, boring spindles, and turning spindles. Multiple rotating cutting spindles operate simultaneously, so as to realize different machining steps, and the machining tools perform machining and cutting at the same time.

[0011] Further, the robot material turnover unit includes: a turntable and multiple robots evenly arranged at 360° along the circumferential direction of the turntable. The robot includes: a mechanical claw and a robotic arm arranged in sequence from near to far from the valve block workpiece. The mechanical claw includes: more than two mechanical fingers and a claw palm. The mechanical fingers are connected to the front part of the claw palm, and the rear part of the claw palm is connected to the movable joint at the front end of the robotic arm.

[0012] Further, the machining unit is connected to an electrical cabinet, and multiple servo drive motors corresponding to multiple rotating cutting spindles are arranged in the electrical cabinet. Each servo drive motor is electrically connected to the corresponding rotating cutting spindle. The servo drive motor drives the rotating cutting spindle to operate for cutting operations. Each rotating cutting spindle for machining is an independent numerical control system.

[0013] Further, the multiple rotating cutting spindles of multiple types are respectively arranged above, below, and on the side of the valve block workpiece. The valve block workpiece is machined by cutting from above, below, and the side at the same time.

[0014] Further, the machining unit is connected in a circulating manner to a cutting fluid circulation system. The cutting fluid circulation system sprays the cutting fluid on the machining unit for cooling and lubricating the cutting tool and the valve block workpiece during the cutting process.

[0015] Further, a cleaning process production line is connected to the output rear end of the robot material turnover unit. The cleaning process production line cleans the valve block workpiece to remove dirt and improve the surface cleanliness.

[0016] Furthermore, the connection type between the rotary cutting spindle and the corresponding spindle tool fixture is any one of a taper shank connection and a transition disk connection.

[0017] The fixture with taper shank connection is installed in the taper hole of the spindle through the taper shank and tightened with bolts. The taper shank connection has high centering accuracy. The fixture with transition plate connection is connected to the spindle through the transition plate. The transition plate connection has accurate centering, good rigidity and high processing accuracy.

[0018] Furthermore, the turntable includes: a fixed part and a rotating part, the robot is connected to the rotating part, a stepper motor is installed on the fixed part, and the stepper motor is electrically connected to the robot through a wire.

[0019] The robot's grabbing and putting actions are controlled by stepper motors. Stepper motors have the advantages of precise control, high efficiency, low cost, smooth movement and flexibility in robot applications, which can effectively improve the robot's operating efficiency and stability.

[0020] When the stepper motor is stationary and running at low speed, it does not need to consume energy to maintain its position. Compared with conventional drives such as DC motors, it can reduce energy consumption and heat generation, and improve the efficiency and running time of the robot. Compared with other high-precision drives, stepper motors are relatively cheap, and the circuit is simple, easy to integrate and control. In the application of robots, it can greatly reduce costs and improve the cost performance of robots. Stepper motors have very smooth motion characteristics when moving at high speed and tightly positioned, which reduces the vibration and noise of the robot and improves the stability of the robot. Stepper motors are suitable for different application scenarios of robots and can be used with different types of controllers and drivers. At the same time, stepper motors have high response speed and control sensitivity, which can be applied to various different robot applications.

[0021] Furthermore, a rotating motor is installed at the center of the fixed part, and the rotating motor is in transmission connection with the rotating part. The rotating motor realizes indexing rotation of the rotating part.

[0022] Furthermore, a conductive slip ring is provided between the fixed part and the rotating part, and the output wire of the stepper motor is connected to the access port of the robot through the conductive slip ring.

[0023] Conductive slip ring is also called collector ring, also known as rotary joint, rotary electrical interface, industrial slip ring, collector ring, return ring, coil, commutator, adapter, conductive ring, brush, belongs to the application category of electrical contact sliding connection, conductive slip ring is a precision transmission device for realizing image, data signal and power transmission of two relatively rotating mechanisms, and is particularly suitable for applications with unlimited continuous rotation, and at the same time, it is necessary to transmit power or data from a fixed position to a rotating position.

[0024] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0025] The machining system for the proportional servo valve block provided by the present utility model has strong integrity through reasonable improvement of the machining system structure. It changes the existing single-spindle machining mode to a multi-spindle simultaneous machining mode, greatly shortening the single-piece machining cycle time, effectively improving the machining efficiency while ensuring the machining accuracy; uses a robot to perform the operation of loading and unloading materials, improving the clamping reliability, enabling long-term repeated use, and having good stability and durability; reducing the labor intensity of workers; and having a simple process and low cost, with broad prospects for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model.

[0027] In the drawings:

[0028] Figure 1 is the overall assembly structure diagram of the machining system for the proportional servo valve block of the present utility model;

[0029] Figure 2 is the partial assembly structure diagram of the robot material turnover unit of the embodiment of the present utility model.

[0030] The reference numerals in the drawings are represented as:

[0031] 1, machining unit; 2, robot material turnover unit; 21, robotic arm; 22, mechanical finger; 23, pawl palm; 3, cleaning process production line; 4, cutting fluid circulation system; 5, electrical cabinet; 6, turntable; 7, stepping motor; 8, rotating motor; 9, fixed part; 10, rotating part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are only examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0033] The terms used in this disclosure are for the purpose of describing particular embodiments only and are not intended to limit the disclosure. The singular forms "a", "the", and "said" used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0034] It should be understood that although the terms first, second, third may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0035] An embodiment of the utility model provides a machining system for a proportional servo valve block. Refer to Figure 1 as shown, including: a machining unit 1 and a robot material turnover unit 2; the robot material turnover unit 2 is connected to the machining unit 1 for transfer, and the robot material turnover unit 2 transfers the valve block workpiece to the machining unit 1; the machining unit is the core unit of the whole system, including: more than 30 rotating cutting spindles of multiple types and their corresponding 30 spindle tool fixtures, and each of the rotating cutting spindles is detachably and fixedly connected to the corresponding spindle tool fixture; multiple rotating cutting spindles operate simultaneously to achieve different machining steps, and the machining tools perform machining and cutting at the same time. The multiple types of rotating cutting spindles include: drilling spindles, reaming spindles, milling spindles, boring spindles, and turning spindles.

[0036] The connection type between the rotating cutting spindle and the corresponding spindle tool fixture is a taper shank connection or an adapter plate connection. The fixture with a taper shank connection is installed in the taper hole of the spindle through the taper shank and tightened with bolts. The centering accuracy of the taper shank connection method is relatively high. The fixture with an adapter plate connection is connected to the spindle through the adapter plate. The adapter plate connection method has accurate centering, good rigidity, and high machining accuracy.

[0037] Refer to Figure 2As shown in the figure, the robot material handling unit 2 includes: a turntable 6, and a plurality of robots evenly arranged in a 360° circumferential direction of the turntable 6. The robots include: a mechanical claw and a robotic arm 21 arranged in sequence from near to far from the valve block workpiece. The mechanical claw includes: more than two mechanical fingers 22 and a claw palm 23. The mechanical fingers 22 are connected to the front part of the claw palm 23, and the rear part of the claw palm 23 is connected to the movable joint at the front end of the robotic arm 21. The processing unit 1 is connected to an electrical cabinet 5. Inside the electrical cabinet 5, there are 30 servo drive motors corresponding to 30 rotary cutting spindles. Each servo drive motor is electrically connected to the corresponding rotary cutting spindle. The servo drive motor drives the rotary cutting spindle to operate for cutting operations. Each processed rotary cutting spindle is an independent numerical control system. Multiple rotary cutting spindles of multiple types are respectively arranged above, below, and on the side of the valve block workpiece. The valve block workpiece is cut from above, below, and side simultaneously.

[0038] The turntable 6 includes: a fixed part 9 and a rotating part 10. The robots are connected to the rotating part 10. A stepping motor 7 is installed on the fixed part 9. The stepping motor is electrically connected to the robots through wires. The grasping and releasing actions of the robots are controlled by the stepping motor. The stepping motor has advantages such as precise control, high efficiency, low cost, smooth movement, and flexibility in the application of robots, which can effectively improve the operating efficiency and stability of the robots. In the application of robots, the cost can be significantly reduced, and the cost performance of the robots can be improved. When the stepping motor is in high-speed motion and precise positioning, it has very smooth motion characteristics, reducing the vibration and noise of the robots and improving the stability of the robots.

[0039] A rotating motor 8 is installed at the center of the fixed part 9. The rotating motor 8 is in transmission connection with the rotating part 10. The rotating motor realizes the indexing rotation of the rotating part 10. A conductive slip ring is arranged between the fixed part 9 and the rotating part 10. The output wires of the stepping motor 7 are connected to the access ports of the robots through the conductive slip ring. The conductive slip ring realizes the signal and power transmission between the two relatively rotating mechanisms of the robots and the stepping motor 7, and can rotate continuously without limit, realizing the transmission of power or data from a fixed position to a rotating position.

[0040] The processing unit 1 is connected in a circulating manner to a cutting fluid circulation system 4. The cutting fluid circulation system 4 sprays the cutting fluid on the processing unit 1 for cooling and lubricating the cutting tool and the valve block workpiece during the cutting process. The output rear end of the robot material handling unit 2 is connected in a transfer manner to a cleaning process production line 3. The cleaning process production line 3 cleans the valve block workpiece to remove dirt and improve the surface cleanliness.

[0041] An operation process of the proportional servo valve block machining system provided in this embodiment in actual application is as follows:

[0042] SeeFigure 2 As shown, on the robot 01, after grasping the workpiece and performing OP10 in the processing unit 1, and after the rotational processing at 6 stations for OP10, the robot 01 removes the workpiece and places it on the marking machine (to print marks on the workpiece). After the rotation of the marking machine, the robot 02 grasps the workpiece from the marking machine and places it into the OP20 processing station, and then continues to perform the OP20 process in the processing unit 1.

[0043] When the OP20 processing is completed, the robot 02 removes the workpiece and places it in the cleaning machine (cleaning process production line 3) for the cleaning process. After cleaning, the robot 03 removes it and places it on the predetermined tray. Every step of the whole process is carried out synchronously (about 30 spindles perform cutting simultaneously from above, below, and the side). The cycle time is the time of the longest working step, about 20 seconds. While ensuring the machining accuracy, the machining efficiency is effectively improved.

[0044] So far, the technical solution of the present utility model has been described in combination with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principle of the present utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present utility model.

[0045] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model; for those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent substitution, and improvement made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Proportional servo valve block machining system, characterized in that: include: Processing unit, robotic material turnover unit; The robot material turnover unit is in transmission connection with the processing unit; The machining unit comprises: a plurality of rotating cutting spindles of various types and corresponding spindle tool holders, each rotating cutting spindle being detachably fixedly connected to each corresponding spindle tool holder; The plurality of types of rotary cutting spindles include: drilling spindles, reaming spindles, milling spindles, boring spindles, and turning spindles; The robot material turnover unit includes: a turntable, and a plurality of robots evenly arranged 360° along the circumferential direction of the turntable; the robot includes: a mechanical claw and a mechanical arm arranged in sequence from near to far from the valve block workpiece; the mechanical claw includes: more than two mechanical fingers and a claw palm; the mechanical finger is connected to the front part of the claw palm, and the rear part of the claw palm is connected to the frontmost movable joint of the mechanical arm.

2. The proportional servo valve block machining system according to claim 1, characterized in that: The machining unit is connected to an electrical cabinet, in which a plurality of servo drive motors corresponding to a plurality of rotating cutting spindles are arranged, and each of the servo drive motors is electrically connected to each corresponding rotating cutting spindle.

3. The proportional servo valve block machining system according to claim 1, characterized in that: The plurality of rotary cutting spindles of various types are respectively arranged above, below and on the side of the valve block workpiece.

4. The proportional servo valve block machining system according to claim 1, characterized in that: The machining unit is connected in circulation with a cutting fluid circulation system.

5. The proportional servo valve block machining system according to claim 1, characterized in that: The output rear end of the robot material turnover unit is connected to a cleaning process production line.

6. The proportional servo valve block machining system according to claim 1, characterized in that: The connection type between the rotating cutting spindle and the corresponding spindle tool holder is any one of a taper shank connection and a transition plate connection.

7. The proportional servo valve block machining system according to claim 1, characterized in that: The turntable comprises: a fixed part and a rotating part, the robot is connected to the rotating part, a stepper motor is installed on the fixed part, and the stepper motor is electrically connected to the robot through a wire.

8. The proportional servo valve block machining system according to claim 7, characterized in that: A rotating motor is installed at the center of the fixed part, and the rotating motor is transmission-connected with the rotating part.

9. The proportional servo valve block machining system according to claim 8, characterized in that: A conductive slip ring is provided between the fixed part and the rotating part, and the output wire of the stepper motor is connected to the access port of the robot through the conductive slip ring.

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