Numerical control compound machining center for hydraulic multi-way valve body and method thereof

Abstract

The application relates to the technical field of valve body machining, and discloses a numerical control composite machining center for a hydraulic multi-way valve body and a method thereof, which comprises an operating table, a mounting seat fixedly installed on the operating table, and four sliding rails fixedly installed on the mounting seat; a main shaft assembly is arranged on the sliding rails; the main shaft assembly comprises a sliding base, the sliding base is slidably connected to the sliding rails, a shell is fixedly connected to the bottom of the sliding base, a motor is fixedly installed at the top of the sliding base, and an output shaft is fixedly connected to the output end of the motor. Through the arrangement of the main shaft assembly, the technical effect of self-adaptive adjustment of the rotating speed of a cutter according to the resistance suffered by the cutter is achieved; when the resistance suffered by the cutter is high, the rotating speed is timely reduced, the load of the cutter is balanced, the wear of the cutter is relieved, the service life of the cutter is prolonged, and the cutter, the connecting shaft and the output shaft are prevented from being damaged.

Description

Technical Field

[0001] This invention relates to the field of valve body machining technology, specifically to a CNC composite machining center and method for hydraulic multi-way valve bodies. Background Technology

[0002] Hydraulic multi-way valves are control components in hydraulic systems, used to switch hydraulic oil circuits to control the hydraulic system. The valve body, as the main structure, has multiple inlet and outlet ports, connection holes, and mounting surfaces. During the valve body manufacturing process, the inlet and outlet ports, connection holes, and mounting surfaces need to be machined. Existing technologies mostly use drilling processes to machine the inlet and outlet ports and connection holes, while milling processes are mostly used to machine the mounting surfaces. In actual production, workers need to equip different processing devices and tools according to different processing parts, and perform processing sequentially according to the processing steps to complete the processing requirements of the valve body.

[0003] However, the existing technology has the following problems:

[0004] In existing milling and drilling techniques for valve bodies, different parts of the valve body and different valve bodies have different hardness. When the cutting tool is machining a material with higher hardness, the resistance to the tool rotation increases. Most existing cutting tools operate at a constant speed. If the tool operates at the same speed when the rotational resistance is high, it will aggravate the load on the tool, accelerate the tool wear, and pose a risk of tool breakage. Summary of the Invention

[0005] The purpose of this invention is to provide a CNC composite machining center and method for hydraulic multi-way valve bodies in order to solve the above-mentioned problems and overcome the defects of the prior art, as detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a CNC composite machining center for a hydraulic multi-way valve body, comprising an operating table, on which a mounting base is fixedly installed, and four slide rails are fixedly installed on the mounting base; a spindle assembly is disposed on the slide rails, the spindle assembly including a slide block, the slide block being slidably connected to the slide rails, a housing being fixedly connected to the bottom of the slide block, a motor being fixedly installed on the top of the slide block, an output shaft being fixedly connected to the output end of the motor, and multiple protrusions being fixedly connected to the end of the output shaft away from the motor; a connecting shaft is rotatably mounted through the bottom of the housing, an inner shaft is sleeved on the top of the connecting shaft, a connecting seat is fixedly connected to the top of the inner shaft, multiple connecting blocks are fixedly connected to the inner wall of the connecting seat, elastic plates are fixedly connected between the multiple protrusions and the multiple connecting blocks, and a controller is fixedly installed on the top of the connecting seat, with a knob rotatably mounted on the controller, the knob being able to adjust the output power of the motor according to the resistance encountered when the connecting shaft rotates.

[0008] Preferably, a drive device for driving the slide to move vertically is provided between the slide rail and the slide block, the connecting seat is located inside the housing, the elastic sheet is made of elastic metal, two locking blocks are fixedly connected to the outer wall of the output shaft, and two slot blocks are fixedly connected to the inner wall of the knob. The slot blocks are provided with slots, and the two locking blocks are respectively embedded in the slots of the two slot blocks.

[0009] Preferably, the inner shaft and the connecting shaft are respectively provided with through holes, and two pins are inserted into the through holes of the inner shaft and the connecting shaft. The two pins are mirror images of each other. The transmission relationship between the inner shaft and the connecting shaft is temporarily released after the two pins are disengaged from the inner shaft.

[0010] Preferably, the bottom of the connecting seat is rotatably connected to a grooved plate, the grooved plate is provided with two arc-shaped grooves, the pin is connected to a sliding shaft, one end of each of the two sliding shafts is slidably connected to the bottom of the connecting seat, and the other end of each of the two sliding shafts is slidably connected to the two arc-shaped grooves of the grooved plate respectively. The knob is fixedly connected to the grooved plate with two connecting rods. When the grooved plate rotates, the two arc-shaped grooves and the two sliding shafts can be used to drive the two pins away from each other.

[0011] Preferably, a turntable is rotatably mounted on the operating platform, and four positioning components are mounted on the turntable. Each positioning component includes a first moving module, which is fixedly mounted on the turntable. A second moving module is slidably connected to the first moving module, and a material platform is slidably connected to the second moving module. A clamping mechanism is slidably mounted on the material platform. A drive device for driving the turntable to rotate is provided on the operating platform. When the turntable rotates, it drives the four positioning components to pass under the four spindle assemblies in sequence. The positioning components are used to clamp and fix the valve body and adjust the processing position of the valve body.

[0012] Preferably, the spindle assembly further includes a vibration damping section, which includes multiple sleeves. A piston is slidably connected to the inner wall of each sleeve. A stopper rod is movably sleeved at one end of each sleeve near the connecting shaft. The stopper rod is fixedly connected to the piston. Multiple oil holes are provided on the piston. A spring is connected between the piston and the inner wall of the sleeve. A support block is fixedly connected to the end of the stopper rod away from the piston. A roller is rotatably mounted on the support block. The roller contacts the outer wall of the connecting shaft. The multiple rollers are arranged in a circular array with the connecting shaft as the center.

[0013] Preferably, the sleeve is equipped with an extrusion tube and a return oil tube. The extrusion tube is located on the side of the piston closer to the connecting shaft, and the return oil tube is located on the side of the piston away from the connecting shaft. One-way valve plates are respectively provided inside the extrusion tube, the oil hole of the piston, and the return oil tube. Multiple heat dissipation tubes are fixedly installed on the housing. One end of each heat dissipation tube is fixedly connected to a multiple extrusion tube, and the other end of each heat dissipation tube is located at the top of the housing. Multiple fins are fixedly connected to the outer wall of each heat dissipation tube.

[0014] Preferably, the spindle assembly further includes a filtration section, which includes a filter screen fixedly connected to the outer wall of the connecting shaft and located above multiple return oil pipes.

[0015] Preferably, a collection box is fixedly installed on the housing, and a guide strip is fixedly connected to the inner wall of the collection box. The guide strip contacts the top surface of the filter screen. When the filter screen rotates, it can guide impurities on its surface into the collection box through the guiding action of the guide strip. An oil injection pipe is installed on the collection box.

[0016] A CNC composite machining method for the valve body of a hydraulic multi-way valve includes the following steps:

[0017] Step 1: Pre-treatment of valve body blank, removing impurities from the valve body surface, and rough machining of the valve body oil outlet, connection hole and mounting surface;

[0018] Step 2: Set machining parameters. Install four different tools on four connecting axes, corresponding to milling and drilling operations. Set four different machining parameters according to the machining sequence.

[0019] Step 3: Loading. Place the first valve body to be processed on the first material platform and clamp it in place using the clamping mechanism. Then start the four spindle assemblies to perform the first processing.

[0020] Step 4: Cyclic processing. Start the turntable to rotate, so that the first valve body moves to the bottom of the second spindle assembly. At this time, the second valve body can be placed on the second material platform. Then start the four spindle assemblies to process the first valve body for the second time and the second valve body for the first time. Subsequent processing is carried out in the same way.

[0021] Step 5: Unloading. After the valve body has been processed four times, the positioning component moves the valve body to the initial position. At this time, the valve body is removed and the next valve body to be processed is placed. Each valve body is processed four times in total.

[0022] Step Six: After machining is completed, inspect and maintain the cutting tools, positioning components, and spindle assembly.

[0023] The beneficial effects are:

[0024] 1. This CNC composite machining center for hydraulic multi-way valve bodies achieves the technical effect of adaptively adjusting the tool speed based on the resistance experienced by the tool through the spindle assembly. When the resistance of the tool is high, the speed is reduced in time to balance the load on the tool, alleviate tool wear, extend the tool's service life, and prevent the tool, connecting shaft, and output shaft from breaking down. As the resistance of the tool decreases, the tool speed increases accordingly, ensuring machining efficiency and achieving efficient and stable valve body machining. When the tool is overloaded, the two pins can also use a purely mechanical linkage to disengage the transmission relationship between the connecting shaft and the inner shaft, stopping the tool from rotating and preventing the tool, connecting shaft, output shaft, and motor from breaking down due to overloaded operation.

[0025] 2. This CNC composite machining center for hydraulic multi-way valve bodies, through the setting of a vibration damping section, utilizes the damping and vibration reduction effects of multiple sleeves and multiple pistons to significantly alleviate the vibration of the connecting shaft, improve the rotational stability of the connecting shaft, reduce mechanical wear, and extend the service life of the spindle assembly. Furthermore, the grease inside the housing can circulate and dissipate heat from the housing using multiple heat dissipation pipes, allowing the grease inside the housing to simultaneously play the roles of lubrication, vibration damping, and cooling, thereby ensuring the operational stability of the spindle assembly.

[0026] 3. This CNC composite machining center for hydraulic multi-way valve bodies, through the setting of the filtration section, enables the filter screen to filter the circulating grease inside the housing, intercepting impurities in the grease on the top surface of the filter screen, preventing impurities from entering the sleeve and heat dissipation pipe and causing blockage; and impurities in contact with the guide strip can fall into the collection box along the guide strip. The operator can periodically open the oil injection pipe, pull out the impurities accumulated in the oil injection pipe and collection box, and then add new grease to ensure the effectiveness of the grease. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the mounting base structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the spindle assembly structure of the present invention;

[0031] Figure 4 This is a schematic diagram of the shell structure of the present invention;

[0032] Figure 5 This is a schematic diagram of the connector structure of the present invention;

[0033] Figure 6 This is a schematic diagram of the connecting shaft structure of the present invention;

[0034] Figure 7 This is a schematic diagram of the elastic sheet structure of the present invention;

[0035] Figure 8 This is a schematic diagram of the knob structure of the present invention;

[0036] Figure 9 This is a schematic diagram of the pin structure of the present invention;

[0037] Figure 10 This is a schematic diagram of the tray structure of the present invention;

[0038] Figure 11 This is a schematic diagram of the vibration damping part structure of the present invention;

[0039] Figure 12 This is a schematic diagram of the sleeve structure of the present invention;

[0040] Figure 13 This is a schematic diagram of the filtration section structure of the present invention;

[0041] Figure 14 This is a schematic diagram of the guide strip structure of the present invention.

[0042] The annotations in the attached figures are explained as follows:

[0043] 1. Control panel; 2. Turntable; 3. Mounting base; 4. Slide rail;

[0044] 5. Positioning component; 51. First moving module; 52. Second moving module; 53. Material table; 54. Clamping mechanism;

[0045] 6. Spindle assembly; 61. Slide; 62. Housing; 63. Motor; 64. Output shaft; 65. Protrusion; 66. Elastic sheet; 67. Connecting seat; 68. Connecting block; 69. Inner shaft; 610. Connecting shaft; 611. Pin; 612. Controller; 613. Knob; 614. Locking block; 615. Slotted block; 616. Slide shaft; 617. Connecting rod; 618. Slotted plate;

[0046] 7. Vibration damping section; 71. Sleeve; 72. Piston; 73. Plug rod; 74. Support block; 75. Roller; 76. Spring; 77. Extrusion tube; 78. Heat dissipation tube; 79. Fin; 710. Oil return tube;

[0047] 8. Filtration section; 81. Filter screen; 82. Collection box; 83. Guide bar; 84. Oil injection pipe. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0049] Example 1

[0050] In existing technologies, when milling and drilling valve bodies, different parts of the valve body and different valve bodies have different hardness. When the cutting tool is machining a material with higher hardness, the resistance to the rotation of the cutting tool increases. Most existing cutting tools operate at a constant speed. If the cutting tool is operated at the same speed when the rotational resistance is high, it will aggravate the load on the cutting tool, accelerate the wear of the cutting tool, and pose a risk of cutting tool breakage. This embodiment is invented to solve the above problems.

[0051] Please see Figure 1 - Figure 9A CNC composite machining center for hydraulic multi-way valve bodies includes an operating table 1, on which a mounting base 3 is fixedly mounted, and four slide rails 4 are fixedly mounted on the mounting base 3. A spindle assembly 6 is mounted on each slide rail 4, the spindle assembly 6 including a slide block 61 slidably connected to the slide rails 4, a housing 62 fixedly connected to the bottom of the slide block 61, and a motor 63 fixedly mounted on the top of the slide block 61. An output shaft 64 is fixedly connected to the output end of the motor 63, and the end of the output shaft 64 furthest from the motor 63 is fixedly connected to... A connecting shaft 610 is rotatably mounted through the bottom of a housing 62 with multiple protrusions 65. An inner shaft 69 is sleeved on the top of the connecting shaft 610. A connecting seat 67 is fixedly connected to the top of the inner shaft 69. Multiple connecting blocks 68 are fixedly connected to the inner wall of the connecting seat 67. Elastic plates 66 are fixedly connected between the multiple protrusions 65 and the multiple connecting blocks 68. A controller 612 is fixedly mounted on the top of the connecting seat 67. A knob 613 is rotatably mounted on the controller 612. The knob 613 can adjust according to the force exerted when the connecting shaft 610 rotates. The resistance is used to adjust the output power of motor 63; after motor 63 starts, it drives output shaft 64 to rotate. Output shaft 64 applies pressure to multiple elastic plates 66 through multiple protrusions 65, so that multiple elastic plates 66 transmit force to connecting seat 67 through multiple connecting blocks 68, so that connecting seat 67 rotates synchronously with output shaft 64. When connecting seat 67 rotates, it drives connecting shaft 610 to rotate synchronously through inner shaft 69. The bottom end of connecting shaft 610 is used to install cutting tools. When connecting shaft 610 rotates, it drives cutting tools to rotate. For example, when connecting shaft 610 is equipped with a drill bit, it can perform drilling operations to process the oil outlet and connecting hole of valve body. When connecting shaft 610 is equipped with a milling cutter, it can perform milling operations to process the mounting surface of valve body. The specific processing operation method is not described in detail here. When the cutting tool generates resistance during contact with valve body, the rotational resistance is transmitted to connecting seat 67 by connecting shaft 610 and inner shaft 69. Connecting seat 67 uses the resistance to apply pressure to multiple elastic plates 66, so that multiple elastic plates 66 deform (e.g. Figure 7 As shown in the figure, when the multiple protrusions 65 drive the multiple connecting blocks 68 to rotate through the multiple elastic plates 66, the multiple elastic plates 66 deform. Therefore, when the connecting seat 67 is considered to be stationary, the output shaft 64 needs to rotate a certain angle to match the deformation of the multiple elastic plates 66, and then drive the connecting seat 67 to rotate. During this process, the connecting seat 67 and the output shaft 64 rotate relative to each other. The greater the rotational resistance experienced by the connecting shaft 610, the greater the relative rotation angle between the connecting seat 67 and the output shaft 64. Therefore, the relative rotation angle between the connecting seat 67 and the output shaft 64 can reflect the resistance experienced by the connecting shaft 610 when it rotates.

[0052] Furthermore, please refer to Figure 3 , Figure 5 , Figure 8A drive device is provided between the slide rail 4 and the slide block 61 to drive the slide block 61 to move vertically. When the slide block 61 moves up and down, it enables the connecting shaft 610 to move up and down synchronously, thereby performing processing. The connecting seat 67 is located inside the housing 62. The elastic sheet 66 is made of elastic metal. Two locking blocks 614 are fixedly connected to the outer wall of the output shaft 64. Two slots 615 are fixedly connected to the inner wall of the knob 613. The slots 615 are provided with slots, and the two locking blocks 614 are respectively embedded in the slots of the two slots 615 (e.g., Figure 8 As shown, when the connecting seat 67 and the output shaft 64 rotate relative to each other, the two locking blocks 614 and the controller 612 also rotate relative to each other. Therefore, the two locking blocks 614 can drive the knob 613 to rotate through the two slot blocks 615. The controller 612 is electrically connected to the motor 63. When the knob 613 is rotated, the controller 612 can adjust the motor 63 to reduce the output power, thereby reducing the speed of the output shaft 64. This achieves the effect of reducing the speed of the output shaft 64 when encountering greater resistance during tool processing, allowing the tool to rotate at a low speed, thus protecting the tool. As the resistance encountered by the tool increases, the speed of the output shaft 64 increases. The lower the resistance, the higher the speed. Conversely, when the resistance decreases, multiple elastic plates 66 use elastic deformation to reset, and the connecting seat 67 and the output shaft 64 also rotate relative to each other to reset. The knob 613 then reverses to reset, and the output shaft 64 speed increases to ensure machining efficiency. By adaptively adjusting the tool speed according to the resistance of the tool, the speed can be reduced in time when the resistance of the tool is high, thereby balancing the load on the tool, alleviating tool wear, extending the tool's service life, and preventing the tool, connecting shaft 610 and output shaft 64 from breaking down. As the resistance of the tool decreases, the tool speed increases accordingly to ensure machining efficiency and achieve efficient and stable valve body machining.

[0053] In addition, please see Figure 9 The inner shaft 69 and the connecting shaft 610 are respectively provided with through holes. Two pins 611 are inserted into the through holes of the inner shaft 69 and the connecting shaft 610. The two pins 611 are mirror images of each other. After the two pins 611 are disengaged from the inner shaft 69, the transmission relationship between the inner shaft 69 and the connecting shaft 610 is temporarily released. The inner shaft 69 and the connecting shaft 610 are in a rotating sleeve relationship. The transmission relationship between the inner shaft 69 and the connecting shaft 610 is realized by limiting the two pins 611. When the two pins 611 are pulled out to disengage from the inner shaft 69, the rotation of the inner shaft 69 does not drive the rotation of the connecting shaft 610.

[0054] In addition, please see Figure 9 - Figure 10A grooved plate 618 is rotatably connected to the bottom of the connecting seat 67. The grooved plate 618 has two arc-shaped grooves. Sliding shafts 616 are connected to pins 611. One end of each sliding shaft 616 is slidably connected to the bottom of the connecting seat 67, and the other end is slidably connected to the two arc-shaped grooves of the grooved plate 618. Two connecting rods 617 are fixedly connected between the knob 613 and the grooved plate 618. When the grooved plate 618 rotates, the two arc-shaped grooves and the two sliding shafts 616 work together to move the two pins 611 away from each other. When the knob 613 rotates, it drives the grooved plate 618 to rotate via the two connecting rods 617. As the grooved plate 618 rotates, the two arc-shaped grooves drive the two sliding shafts 616 to slide away from each other, causing the two sliding shafts 616 to move the two pins 611 away from the inner shaft 69. When the knob 613 rotates... When the angle reaches its maximum, the rotational resistance experienced by the connecting shaft 610 exceeds the set maximum value. At this point, the two pins 611 disengage from the inner shaft 69, thus releasing the transmission relationship between the two pins 611 and the connecting shaft 610. The connecting shaft 610 and the tool no longer rotate on the valve body, preventing the connecting shaft 610 and the tool from breaking apart. Simultaneously, the knob 613 controls the motor 63 to shut down via the controller 612. The two pins 611 also serve as a second layer of protection. If the controller 612 fails to shut down the motor 63 in time, the two pins 611 can still use a purely mechanical linkage to release the transmission relationship between the connecting shaft 610 and the inner shaft 69, stopping the tool from rotating and preventing the tool from being overloaded. This prevents the tool, connecting shaft 610, output shaft 64, and motor 63 from breaking apart due to overloaded operation.

[0055] It is worth noting that, please refer to Figure 1 - Figure 3 A turntable 2 is rotatably mounted on the operating table 1. Four positioning components 5 are mounted on the turntable 2. Each positioning component 5 includes a first moving module 51, which is fixedly mounted on the turntable 2. A second moving module 52 is slidably connected to the first moving module 51, and a material platform 53 is slidably connected to the second moving module 52. A clamping mechanism 54 is slidably mounted on the material platform 53. The operating table 1 is equipped with a drive device for rotating the turntable 2. When the turntable 2 rotates, it causes the four positioning components 5 to pass sequentially beneath the four main shaft assemblies 6. The positioning components 5 are used for clamping. The valve body is fixed and its machining position is adjusted. A drive device is provided between the second moving module 52 and the first moving module 51. A drive device is also provided between the material table 53 and the second moving module 52. After the clamping mechanism 54 fixes the valve body, the positioning component 5 can drive the valve body to move horizontally in four directions, thereby cooperating with the spindle assembly 6 to perform milling and drilling operations. The four positioning components 5 can fix four valve bodies. The turntable 2 rotates 90 degrees each time, so that the positioning components 5 can drive the valve body to pass under the four spindle assemblies 6 one after another to perform machining with four different tools.

[0056] Example 2

[0057] Based on the above embodiments, during the machining process, the cutting tool may come into contact with the valve body and vibrate. After the vibration is transmitted to the connecting shaft 610, it may affect its rotational stability, aggravate mechanical wear, and shorten the service life of the spindle assembly 6. This embodiment is invented to solve the above problems.

[0058] Please see Figure 4 , Figure 11 , Figure 12 The spindle assembly 6 also includes a vibration damping section 7, which includes multiple sleeves 71. A piston 72 is slidably connected to the inner wall of each sleeve 71. A stopper rod 73 is movably sleeved at the end of the sleeve 71 near the connecting shaft 610. The stopper rod 73 is fixedly connected to the piston 72. Multiple oil holes are provided on the piston 72. A spring 76 connects the piston 72 and the inner wall of the sleeve 71. A support block 74 is fixedly connected to the end of the stopper rod 73 away from the piston 72. A roller 75 is rotatably mounted on the support block 74. The roller 75 contacts the outer wall of the connecting shaft 610. The multiple rollers 75 are arranged in a circular array with the connecting shaft 610 as the center. All the multiple rollers 75 are tightly pressed against the outer wall of the connecting shaft 610. The housing 62 and the multiple sleeves 71 are filled with grease. When the connecting shaft 610 vibrates... When the vibration of the connecting shaft 610 is transmitted to the piston rod 73 through the roller 75 and the support block 74, taking one of the piston rods 73 as an example, when the piston rod 73 drives the piston 72 to move away from the connecting shaft 610, the grease in the sleeve 71 is squeezed through multiple oil holes on the piston 72, generating a damping force in the process to buffer the vibration potential energy. When the connecting shaft 610 is reset, the spring 76 uses its elastic force to squeeze the piston 72, so that the piston 72 and the piston rod 73 are reset. The roller 75 always keeps against the connecting shaft 610. By using the damping and vibration damping effect of multiple sleeves 71 and multiple pistons 72, the vibration of the connecting shaft 610 can be significantly reduced, the rotational stability of the connecting shaft 610 can be improved, mechanical wear can be reduced, and the service life of the spindle assembly 6 can be extended.

[0059] It is worth noting that, please refer to Figure 12The sleeve 71 is equipped with an extrusion pipe 77 and an oil return pipe 710. The extrusion pipe 77 is located on the side of the piston 72 closer to the connecting shaft 610, and the oil return pipe 710 is located on the side of the piston 72 away from the connecting shaft 610. One-way valves are respectively installed inside the extrusion pipe 77, the oil hole of the piston 72, and the oil return pipe 710. Multiple heat dissipation pipes 78 are fixedly installed on the housing 62. One end of each heat dissipation pipe 78 is fixedly connected to the extrusion pipe 77, and the other end of each heat dissipation pipe 78 is located at the top of the housing 62. Multiple fins 79 are fixedly connected to the outer wall of the heat dissipation pipes 78. Taking one sleeve 71 as an example, when the piston 72 moves away from the connecting shaft 610, some of the grease inside the sleeve 71 flows through the oil hole to the side of the piston 72 closer to the connecting shaft 610. When the piston 72 moves closer to the connecting shaft 610, the grease on the side of the piston 72 closer to the connecting shaft 610 is squeezed and passes through the extrusion pipe. The grease enters the heat dissipation pipe 78 through the 77, and the original grease in the heat dissipation pipe 78 enters the housing 62 through its top. At the same time, the piston 72, on the side away from the connecting shaft 610, uses negative pressure to draw the grease in the housing 62 to the sleeve 71 for replenishment through the return oil pipe 710. The one-way valve plate of the extrusion pipe 77, the oil hole of the piston 72, and the return oil pipe 710 allow the grease to move only in one direction, so that the grease can circulate between the housing 62, the return oil pipe 710, the sleeve 71, the extrusion pipe 77, and the heat dissipation pipe 78. The heat dissipation pipe 78, with its multiple fins 79, allows the grease in the heat dissipation pipe 78 to quickly dissipate heat, achieving a good heat dissipation effect. This allows the grease in the housing 62 to circulate and dissipate the heat in the housing 62 using the multiple heat dissipation pipes 78. The grease in the housing 62 can simultaneously play the roles of lubrication, vibration damping, and cooling, thereby ensuring the stability of the spindle assembly 6.

[0060] Example 3

[0061] Based on the above embodiments, after the spindle assembly 6 has been used for a long time, impurities caused by mechanical wear will exist inside the housing 62. After these impurities enter the sleeve 71 and the heat dissipation pipe 78, they may cause blockage, thereby affecting the vibration reduction and heat dissipation effects. This embodiment is invented to solve the above problems.

[0062] Please see Figure 4 , Figure 13 , Figure 14 The spindle assembly 6 also includes a filtration section 8, which includes a filter screen 81. The filter screen 81 is fixedly connected to the outer wall of the connecting shaft 610. The filter screen 81 is located above the multiple oil return pipes 710. The filter screen 81 rotates with the connecting shaft 610. The filter screen 81 can filter the grease circulating in the housing 62 and intercept impurities in the grease on the top surface of the filter screen 81 to prevent impurities from entering the sleeve 71 and the heat dissipation pipe 78 and causing blockage.

[0063] It is worth mentioning that you should refer to Figure 14 A collection box 82 is fixedly installed on the housing 62. A guide strip 83 is fixedly connected to the inner wall of the collection box 82. The guide strip 83 contacts the top surface of the filter screen 81. When the filter screen 81 moves, the impurities on the surface of the filter screen 81 directly contact the guide strip 83, applying pressure to it. Since the guide strip 83 is inclined with its inclined surface facing inwards towards the collection box 82, the impurities move along the inclined surface of the guide strip 83 towards the collection box 82 as they continuously apply pressure. Finally, the impurities fall into the collection box 82 along the guide strip 83. Therefore, when the filter screen 81 rotates, it can remove surface impurities through the guide strip 83. The guide grease is introduced into the collection box 82, which is equipped with an oil injection pipe 84. When the filter screen 81 rotates with the connecting shaft 610, the guide strip 83 continuously rubs against the top surface of the filter screen 81, causing impurities on the surface of the filter screen 81 to be scraped off by the guide strip 83. As the filter screen 81 rotates, the impurities in contact with the filter screen 81 generate a certain centrifugal force and exert a pushing force on the guide strip 83. Finally, the impurities in contact with the guide strip 83 can fall into the collection box 82 along the guide strip 83. The operator can periodically open the oil injection pipe 84, remove the impurities accumulated in the oil injection pipe 84 and the collection box 82, and then add new grease to ensure the effectiveness of the grease.

[0064] Example 4

[0065] A CNC composite machining method for hydraulic multi-way valve bodies, employing the CNC composite machining center for hydraulic multi-way valve bodies described in the above embodiments, further includes the following steps:

[0066] Step 1: Pre-treatment of valve body blank, removing impurities from the valve body surface, and rough machining of the valve body oil outlet, connection hole and mounting surface;

[0067] Step 2: Set machining parameters. Install four different tools on the four connecting shafts 610, corresponding to milling and drilling operations. Set four different machining parameters according to the machining sequence.

[0068] Step 3: Loading. Place the first valve body to be processed on the first material table 53 and clamp it in place using the clamping mechanism 54. Then start the four spindle assemblies 6 to perform the first processing.

[0069] Step 4: Cyclic processing. Start the turntable 2 to rotate, so that the first valve body moves to the bottom of the second spindle assembly 6. At this time, the second valve body can be placed on the second material table 53. Then start the four spindle assemblies 6 to process the first valve body for the second time and the second valve body for the first time. Subsequent processing is carried out in the same way.

[0070] Step 5: Unloading. After the valve body has been processed four times, the positioning component 5 moves the valve body to the initial position. At this time, the valve body is removed and the next valve body to be processed is placed. Each valve body is processed four times in total.

[0071] Step 6: After machining is completed, inspect and maintain the cutting tool, positioning assembly 5 and spindle assembly 6.

[0072] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A CNC composite machining center for hydraulic multi-way valve bodies, comprising an operating table (1), characterized in that: The operating table (1) is fixedly installed with a mounting base (3), and four slide rails (4) are fixedly installed on the mounting base (3). A spindle assembly (6) is provided on the slide rail (4). The spindle assembly (6) includes a slide block (61), which is slidably connected to the slide rail (4). A housing (62) is fixedly connected to the bottom of the slide block (61). A motor (63) is fixedly installed on the top of the slide block (61). An output shaft (64) is fixedly connected to the output end of the motor (63). A plurality of protrusions (65) are fixedly connected to the end of the output shaft (64) away from the motor (63). A connecting shaft (610) is rotatably mounted through the bottom of the housing (62). 10) An inner shaft (69) is sleeved on the top, and a connecting seat (67) is fixedly connected to the top of the inner shaft (69). Multiple connecting blocks (68) are fixedly connected to the inner wall of the connecting seat (67). Elastic sheets (66) are fixedly connected between the multiple protrusions (65) and the multiple connecting blocks (68). A controller (612) is fixedly installed on the top of the connecting seat (67). A knob (613) is rotatably installed on the controller (612). The knob (613) can adjust the output power of the motor (63) according to the resistance encountered when the connecting shaft (610) rotates. A drive device for driving the slide block (61) to move vertically is provided between the slide rail (4) and the slide block (61). The connecting seat (67) is located inside the housing (62). The elastic sheet (66) is made of elastic metal. Two locking blocks (614) are fixedly connected to the outer wall of the output shaft (64). Two slot blocks (615) are fixedly connected to the inner wall of the knob (613). The slot blocks (615) are provided with slots. The two locking blocks (614) are respectively embedded in the slots of the two slot blocks (615).

2. The CNC composite machining center for hydraulic multi-way valve bodies according to claim 1, characterized in that: The inner shaft (69) and the connecting shaft (610) are respectively provided with through holes. Two pins (611) are inserted into the through holes of the inner shaft (69) and the connecting shaft (610). The two pins (611) are mirror images of each other. The inner shaft (69) is temporarily disconnected from the connecting shaft (610) after the two pins (611) are disengaged from the inner shaft (69).

3. A CNC composite machining center for a hydraulic multi-way valve body according to claim 2, characterized in that: The bottom of the connecting seat (67) is rotatably connected to a grooved plate (618). The grooved plate (618) is provided with two arc-shaped grooves. The pin (611) is connected to a sliding shaft (616). One end of each sliding shaft (616) is slidably connected to the bottom of the connecting seat (67). The other end of each sliding shaft (616) is slidably connected to the two arc-shaped grooves of the grooved plate (618). The knob (613) is fixedly connected to the grooved plate (618) with two connecting rods (617). When the grooved plate (618) rotates, the two arc-shaped grooves and the two sliding shafts (616) can be used to drive the two pins (611) away from each other.

4. A CNC composite machining center for a hydraulic multi-way valve body according to claim 1, characterized in that: A turntable (2) is rotatably mounted on the operating table (1). Four positioning components (5) are mounted on the turntable (2). Each positioning component (5) includes a first moving module (51), which is fixedly mounted on the turntable (2). A second moving module (52) is slidably connected to the first moving module (51). A material platform (53) is slidably connected to the second moving module (52). A clamping mechanism (54) is slidably mounted on the material platform (53). A driving device for driving the turntable (2) to rotate is provided on the operating table (1). When the turntable (2) rotates, it drives the four positioning components (5) to pass under the four spindle components (6) in sequence. The positioning components (5) are used to clamp and fix the valve body and adjust the processing position of the valve body.

5. A CNC composite machining center for a hydraulic multi-way valve body according to claim 1, characterized in that: The spindle assembly (6) also includes a vibration damping part (7), which includes multiple sleeves (71). A piston (72) is slidably connected to the inner wall of the sleeve (71). A stopper rod (73) is movably sleeved at one end of the sleeve (71) near the connecting shaft (610). The stopper rod (73) is fixedly connected to the piston (72). Multiple oil holes are provided on the piston (72). A spring (76) is connected between the piston (72) and the inner wall of the sleeve (71). A support block (74) is fixedly connected to one end of the stopper rod (73) away from the piston (72). A roller (75) is rotatably mounted on the support block (74). The roller (75) contacts the outer wall of the connecting shaft (610). Multiple rollers (75) are arranged in a circular array with the connecting shaft (610) as the center.

6. A CNC composite machining center for a hydraulic multi-way valve body according to claim 5, characterized in that: The sleeve (71) is equipped with an extrusion tube (77) and an oil return tube (710). The extrusion tube (77) is located on the side of the piston (72) close to the connecting shaft (610), and the oil return tube (710) is located on the side of the piston (72) away from the connecting shaft (610). One-way valve plates are respectively provided inside the extrusion tube (77), the oil hole of the piston (72) and the oil return tube (710). Multiple heat dissipation tubes (78) are fixedly installed on the housing (62). One end of the multiple heat dissipation tubes (78) is fixedly connected to the multiple extrusion tubes (77), and the other end of the multiple heat dissipation tubes (78) is located at the top of the housing (62). Multiple fins (79) are fixedly connected to the outer wall of the heat dissipation tubes (78).

7. A CNC composite machining center for a hydraulic multi-way valve body according to claim 6, characterized in that: The main shaft assembly (6) also includes a filtration section (8), which includes a filter screen (81) fixedly connected to the outer wall of the connecting shaft (610) and located above a plurality of return oil pipes (710).

8. A CNC composite machining center for a hydraulic multi-way valve body according to claim 7, characterized in that: A collection box (82) is fixedly installed on the housing (62). A guide strip (83) is fixedly connected to the inner wall of the collection box (82). The guide strip (83) contacts the top surface of the filter screen (81). When the filter screen (81) rotates, it can guide the impurities on its surface into the collection box (82) through the guiding action of the guide strip (83). An oil injection pipe (84) is installed on the collection box (82).

9. A CNC composite machining method for the valve body of a hydraulic multi-way valve, characterized in that: The CNC composite machining center for hydraulic multi-way valve bodies according to any one of claims 1-8 further includes the following steps: Step 1: Pre-treatment of valve body blank, removing impurities from the valve body surface, and rough machining of the valve body oil outlet, connection hole and mounting surface; Step 2: Set machining parameters. Install four different tools on four connecting axes (610) to correspond to milling and drilling operations. Set four different machining parameters according to the machining sequence. Step 3: Loading the material. Place the first valve body to be processed on the first material table (53) and clamp it in place by the clamping mechanism (54). Then start the four spindle assemblies (6) to perform the first processing. Step 4: Cyclic processing. Start the turntable (2) to rotate, so that the first valve body moves to the bottom of the second spindle assembly (6). At this time, the second valve body can be placed on the second material table (53). Then start the four spindle assemblies (6) to process the first valve body for the second time and the second valve body for the first time. Subsequent processing is carried out in the same way. Step 5: Unloading. After the valve body has been processed four times, the positioning component (5) moves the valve body to the initial position. At this time, the valve body is removed and the next valve body to be processed is placed. Each valve body is processed four times in total. Step 6: After machining is completed, inspect and maintain the cutting tool, positioning assembly (5) and spindle assembly (6).

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