Automatic valve milling device and method

Abstract

The application provides a valve automatic milling device and method, relates to the technical field of milling devices, and comprises a rack, a milling assembly, a positioning assembly and a conveying assembly.The rack is arranged on the ground to be installed.The milling assembly is installed on the rack and is used for milling the valve end cover.The positioning assembly is arranged on the milling assembly and is used for positioning the shaft center of the valve end cover.The conveying assembly is installed on the rack and is used for conveying the valve to be processed.The application utilizes the conveying assembly to perform position correction on the valve to be processed, and cooperates with the positioning assembly to perform coaxial positioning on the valve to be processed, so that the milling assembly can accurately mill the valve end cover and the milling quality of the valve to be processed is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of milling devices, in particular to a valve automatic milling device and method. BACKGROUND

[0002] ‌Valve milling refers to the process of using milling methods to process valve parts. Milling is a process that uses a rotating multi-blade cutting tool to perform feed motion relative to the workpiece according to the programmed program, and can be processed in almost any direction. In valve processing, milling is often used to process the end face, flat surface and curved surface of the valve. For example, the valve end face milling device realizes accurate processing of the valve end face through the control box and the milling cutter seat installed on the machine tool. Valve milling plays an important role in valve manufacturing. It can ensure the accuracy and surface quality of key parts such as the sealing surface and connecting surface of the valve, thereby improving the performance and service life of the valve.

[0003] For example, the invention patent with the patent name of a valve automatic milling machine, the patent number CN118789300B, includes a conveying unit, a clamping assembly is arranged on the conveying unit, and the clamping assembly can stably clamp the valve to be processed; the conveying unit is provided with a pushing unit on both sides, and the pushing unit is provided with a milling assembly, a polishing assembly and a cleaning assembly; in the present application, the valve body to be processed is placed on the clamping assembly one by one, and then conveyed forward by the conveying unit. During the conveying process, the valve body end is sequentially subjected to burr milling and removal, polishing and finishing of the valve body end, and cleaning of the foreign matter inside the valve body, realizing automatic processing of the valve body blank, completely removing the burrs on the valve body, and improving the processing efficiency of the valve body. In addition, the auxiliary assembly is used to supplement the milling fluid, which can cool the milling assembly and the polishing assembly, and protect the processed part of the valve body.

[0004] However, the patent uses a chain conveyor belt and a clamping assembly to transport the valve to be processed to the milling position. Due to the limited conveying accuracy of the chain conveyor belt, the center axis of the valve end cover to be processed does not coincide with the center axis of the milling cutter, and the milling cutter is offset at the milling position of the valve to be processed, which affects the milling quality of the valve to be processed, and there is a certain defect.

[0005] Therefore, the present application is proposed. SUMMARY

[0006] The purpose of the present application is to provide a valve automatic milling device and method to solve the problems in the background art.

[0007] To solve the above technical problems, the technical scheme of the present application is as follows:

[0008] The embodiment of the present application provides a valve automatic milling device, which comprises:

[0009] A rack is arranged on the ground to be installed;

[0010] A milling assembly is arranged on the rack, and the milling assembly is used for milling a valve end cover;

[0011] A positioning assembly is arranged on the milling assembly, and the positioning assembly is used for positioning the axis of the valve end cover;

[0012] A conveying assembly is arranged on the rack, and the conveying assembly is used for conveying a valve to be processed;

[0013] The conveying assembly comprises:

[0014] A bearing conveying strip is arranged on the rack, and the bearing conveying strip is used for positioning and conveying a valve to be processed;

[0015] Two positioning support strips are fixedly arranged above the bearing conveying strip, and the two positioning support strips have a positioning gap for positioning a valve to be processed;

[0016] A guide positioning strip is fixedly arranged at the feeding end of the positioning support strip, and the guide positioning strip is in the shape of an inclined downward "8".

[0017] Further, the bearing conveying strip comprises:

[0018] Two transmission rollers are rotatably arranged on the rack;

[0019] A plurality of transmission positioning strips are hingedly arranged, and the transmission positioning strips are transmissionally connected to the two transmission rollers, and the transmission positioning strips are provided with positioning grooves matched with the bottom of the valve to be processed;

[0020] A transmission motor is fixedly arranged on the rack, and the transmission motor is transmissionally connected to one of the transmission rollers.

[0021] Further, the distance between the two transmission rollers is greater than the length of the positioning support strip.

[0022] Further, the milling assembly comprises three milling assemblies, two of which are used for horizontal milling operation, and the third one is used for vertical milling operation.

[0023] Further, the milling assembly comprises:

[0024] A mounting seat, a driving sleeve is rotatably mounted on the mounting seat;

[0025] A milling cutter is threadedly mounted at the end of the driving sleeve, and the rotation direction of the milling cutter is opposite to the mounting and fastening direction;

[0026] A milling motor is fixedly mounted on the mounting seat, and the milling motor is in transmission connection with the driving sleeve.

[0027] Further, two milling assemblies for horizontal milling operation are mounted by horizontal driving members, the horizontal driving members comprise:

[0028] Two guide rails are arranged in parallel, and the two guide rails are fixedly mounted on the rack;

[0029] Two driving seats are arranged, the two driving seats are slidingly mounted on the guide rails, and the mounting seat is fixedly mounted on the driving seat;

[0030] A synchronous driving screw is rotatably mounted on the rack, and the synchronous driving screw is in threaded connection with the two driving seats;

[0031] A traveling motor is fixedly mounted on the rack, and the traveling motor is in transmission connection with the synchronous driving screw.

[0032] Further, the milling assembly for vertical milling operation is mounted by a vertical traveling member, the vertical traveling member comprises:

[0033] A positioning frame is fixedly mounted on the rack, and the mounting seat is slidingly mounted on the positioning frame;

[0034] A lifting cylinder is fixedly mounted on the inner top surface of the positioning frame, and the output end of the lifting cylinder is connected with the mounting seat.

[0035] Further, the positioning member comprises:

[0036] A fixed mounting rod is threadedly mounted on the mounting seat, and the fixed mounting rod is located inside the driving sleeve;

[0037] A positioning sleeve is slidingly arranged outside the fixed mounting rod, and the positioning sleeve slides along the length direction of the fixed mounting rod;

[0038] A buffer spring is sleeved outside the fixed mounting rod, and two ends of the buffer spring are respectively in abutment with the positioning sleeve and the mounting seat.

[0039] Further, an end of the positioning sleeve away from the mounting seat has a chamfer structure.

[0040] In another aspect, the application also discloses a valve automatic milling method using the valve automatic milling device.

[0041] The feeding deviation correction is used to place the valve to be machined into the positioning groove and move with the transmission positioning strip, and at the same time, the top of the valve to be machined is positionally corrected by the guide positioning strip until the vertical state.

[0042] The coaxial positioning is used when the valve to be machined is transmitted to the milling position by the transmission positioning strip, and the three positioning sleeves are respectively inserted into the three end cover holes of the valve and are coaxially positioned.

[0043] The synchronous milling is used to mill the three end faces of the valve to be machined by the three milling assemblies, and the milling process of the valve to be machined is completed.

[0044] The continuous operation is used to mill the valves to be machined one by one according to the above steps, and the continuous automatic milling of the valves to be machined is realized.

[0045] The above scheme of the application at least has the following beneficial effects:

[0046] The application uses the conveying assembly to convey the valve to be machined, the guide positioning strip and the positioning support strip correct the position of the valve to be machined during the conveying process, and the initial positioning of the valve to be machined is realized. Then, the positioning assembly co-axially positions the valve to be machined before the valve to be machined is milled, and the milling position can be completely coincided with the valve to be machined when the milling cutter mills the valve to be machined, so that the milling position deviation problem is effectively avoided, and the milling quality of the valve to be machined is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 Fig. 1 is a schematic structural diagram of a valve automatic milling device provided by the application;

[0048] Figure 2 Fig. 2 is a schematic structural diagram of a top view of the valve automatic milling device provided by the application;

[0049] Figure 3 Fig. 3 is a schematic structural diagram of a state in which a conveying assembly of the valve automatic milling device provided by the application preliminarily positions a valve to be machined;

[0050] Figure 4A coaxial positioning state structure schematic diagram of a valve automatic milling device provided by the present application;

[0051] Figure 5 A positioning assembly installation structure schematic diagram of a valve automatic milling device provided by the present application;

[0052] Figure 6 A fixed mounting rod structure schematic diagram of a valve automatic milling device provided by the present application;

[0053] Figure 7 A synchronous driving screw structure schematic diagram of a valve automatic milling device provided by the present application.

[0054] BRIEF DESCRIPTION OF DRAWINGS

[0055] 1, rack; 2, milling assembly; 3, positioning assembly; 4, conveying assembly; 5, bearing conveying strip; 6, positioning support strip; 7, guiding positioning strip; 8, transmission roller; 9, transmission positioning strip; 10, positioning groove; 11, conveying motor; 12, mounting seat; 13, milling cutter; 14, driving sleeve; 15, milling motor; 16, guide rail; 17, driving seat; 18, synchronous driving screw; 19, traveling motor; 20, positioning frame; 21, lifting cylinder; 22, fixed mounting rod; 23, positioning sleeve; 24, buffer spring; 25, moving sliding groove; 26, limit pin; 27, limit cover; 28, bearing; 101, valve to be processed. DETAILED DESCRIPTION

[0056] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it is understood that the present application can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0057] Example 1:

[0058] As Figures 1 to 7 shown, the embodiments of the present application provide a valve automatic milling device, comprising:

[0059] A rack 1, which is erected on the ground to be installed.

[0060] A milling assembly 2, which is installed on the rack 1, is used for milling operation on the valve end cover.

[0061] A positioning assembly 3, which is arranged on the milling assembly 2, is used for axial positioning of the valve end cover.

[0062] A conveying assembly 4 is installed on the frame 1, and is used to convey the valve 101 to be machined.

[0063] The conveying assembly 4 comprises:

[0064] A carrying conveying strip 5 is installed on the frame 1, and is used to position and carry the valve 101 to be machined.

[0065] Two positioning support strips 6 are fixedly arranged above the carrying conveying strip 5, and have a positioning gap between them for positioning the valve 101 to be machined.

[0066] A guide positioning strip 7 is fixedly arranged at the feeding end of the positioning support strip 6, and has an inclined downward "8" shape.

[0067] In the embodiment, as shown in Figure 3 the valve 101 to be machined is placed on the carrying conveying strip 5 for conveying. During the conveying, the guide positioning strip 7 performs a deviation rectification operation on the valve 101 to be machined. After the position of the valve 101 to be machined is rectified, the top of the valve 101 to be machined is erected on the positioning conveying strip, and the preliminary positioning of the valve 101 to be machined is completed. When the valve 101 to be machined is conveyed to the position of the milling assembly 2, the positioning assembly 3 performs coaxial positioning on the end cover of the valve 101 to be machined, and at the same time, the milling assembly 2 performs milling operation on the end cover of the valve 101 to be machined. Due to the preliminary positioning and coaxial positioning of the valve 101 to be machined, the milling assembly 2 can perform accurate milling operation on the end cover of the valve 101 to be machined, and the machining quality of the valve 101 to be machined is greatly improved.

[0068] In a specific embodiment, the carrying conveying strip 5 comprises:

[0069] Two transmission rollers 8 are rotationally installed on the frame 1.

[0070] A plurality of transmission positioning strips 9 are hingedly arranged, and are drivingly connected to the two transmission rollers 8. The transmission positioning strips 9 are provided with positioning grooves 10 matched with the bottom of the valve 101 to be machined.

[0071] A transmission motor 11 is fixedly installed on the frame 1, and is drivingly connected to one of the transmission rollers 8.

[0072] When the transmission motor 11 is started, the transmission rollers 8 rotate, the transmission positioning strips 9 installed between the two transmission rollers 8 rotate, and the valve to be machined 101 installed in the positioning groove 10 moves with the transmission positioning strips 9. When the transmission positioning strips 9 drive the valve to be machined 101 to the position of the milling assembly 2, the transmission motor 11 stops working. At this time, the positioning assembly 3 co-axially positions the valve to be machined 101, and the milling assembly 2 mills the end cover of the valve to be machined 101. When the valve to be machined 101 completes the milling operation, the transmission motor 11 is started to continue to transport the valve to be machined 101 to the position of the milling assembly 2 for milling operation through the transmission positioning strips 9. The above operation is repeated to complete the continuous milling operation of the valve to be machined 101.

[0073] The distance between the two transmission rollers 8 is greater than the length of the positioning support strip 6. After the valve to be machined 101 is installed in the positioning groove 10, the valve to be machined 101 moves with the transmission positioning strips 9. In this process, the guide positioning strip 7 corrects the valve to be machined 101. After the correction is completed, the top of the valve to be machined 101 is in contact with the top surface of the positioning support strip 6, and the preliminary positioning of the valve to be machined 101 is completed.

[0074] Further, the milling assembly 2 is provided with three, and two of the milling assemblies 2 perform horizontal direction milling operation, and the third milling assembly 2 performs vertical direction milling operation. The three milling assemblies 2 respectively mill the three end covers of the valve to be machined 101.

[0075] Specifically, the milling assembly 2 comprises:

[0076] The mounting seat 12 is rotatably installed with a driving sleeve 14. The driving sleeve 14 is rotatably installed on the mounting seat 12 through a bearing 28.

[0077] The milling cutter 13 is threadedly installed at the end of the driving sleeve 14, and the rotating direction of the milling cutter 13 is opposite to the fastening direction;

[0078] The milling motor 15 is fixedly installed on the mounting seat 12, and the milling motor 15 is in transmission connection with the driving sleeve 14. The milling motor 15 is in transmission connection with the driving sleeve 14 through a helical gear set (not shown in the figure).

[0079] In this embodiment, when the valve to be machined 101 needs to be milled, the milling motor 15 is started, the milling motor 15 drives the milling cutter 13 to rotate through the driving sleeve 14, and then the milling cutter 13 mills the end cover of the valve to be machined 101.

[0080] In order to ensure that the valve 101 to be machined can be accurately conveyed to the position of the milling assembly 2, an optical sensor can be arranged on the mounting seat 12. When the optical sensor detects that the valve 101 to be machined reaches the milling position, the signal detected by the optical sensor is transmitted to the controller, and then the controller controls the transmission motor 11 to stop working.

[0081] It should be noted that the controller receives the detection signal of the optical sensor and controls the transmission motor 11 to stop, which belongs to the prior art, and the specific circuit structure and control method will not be described here.

[0082] Further, the two milling assemblies 2 performing horizontal milling operation are installed by horizontal driving members, and the horizontal driving members comprise:

[0083] The guide rails 16 are arranged in parallel and fixedly installed on the rack 1.

[0084] The driving seats 17 are arranged in two, slidably installed on the guide rails 16, and the mounting seat 12 is fixedly installed on the driving seat 17.

[0085] The synchronous driving lead screws 18 are rotatably installed on the rack 1, and the synchronous driving lead screws 18 are threadedly connected with the two driving seats 17.

[0086] The traveling motor 19 is fixedly installed on the rack 1, and the traveling motor 19 is drivingly connected with the synchronous driving lead screws 18.

[0087] In this embodiment, the synchronous driving lead screws 18 are threadedly connected with the two driving seats 17 in opposite directions, and under the driving of the traveling motor 19, the synchronous driving lead screws 18 rotate. The driving seats 17 threadedly connected with the synchronous driving lead screws 18 cannot rotate with the synchronous driving lead screws 18 due to the limiting action of the guide rails 16, and the two driving seats 17 can only synchronously approach or separate along the length direction of the synchronous driving lead screws 18, thereby driving the milling assembly 2 to mill the two end covers of the valve 101 in the horizontal direction.

[0088] It should be noted that the traveling motor 19 adopts a servo motor. The servo motor refers to a motor that controls the operation of mechanical elements in a servo system, and is an auxiliary motor indirect speed changing device. The servo motor can control the speed and the position accuracy is very accurate, and can convert a voltage signal into torque and speed to drive a control object. The servo motor rotor speed is controlled by the input signal and can quickly react, and is used as an execution element in an automatic control system, and has characteristics such as small electromechanical time constant and high linearity, and can convert the received electrical signal into angular displacement or angular velocity output on the motor shaft. The traveling motor 19 adopts a servo motor, which can accurately control the traveling distance of the milling cutter 13, thereby ensuring the milling quality of the valve 101 to be machined.

[0089] Further, the milling assembly 2 performing the vertical direction milling operation is installed by a vertical traveling piece, and the vertical traveling piece comprises:

[0090] A positioning frame 20 is fixedly installed on the rack 1, and the mounting seat 12 is slidingly installed on the positioning frame 20.

[0091] A lifting cylinder 21 is fixedly installed on the inner top surface of the positioning frame 20, and the output end of the lifting cylinder 21 is connected with the mounting seat 12.

[0092] In the embodiment, when the valve 101 to be machined reaches the milling position, the piston rod output end of the lifting cylinder 21 pushes the milling assembly 2 to move downward, pushes the milling cutter 13 to contact with the end cover of the valve 101 to be machined, and then the milling cutter 13 performs the milling operation on the end cover of the valve 101 to be machined under the driving of the milling motor 15.

[0093] Further, the positioning piece comprises:

[0094] A fixed mounting rod 22 is threadedly installed on the mounting seat 12, and the fixed mounting rod 22 is located inside the driving sleeve 14.

[0095] A positioning sleeve 23 is slidingly arranged outside the fixed mounting rod 22, and the positioning sleeve 23 slides along the length direction of the fixed mounting rod 22.

[0096] A buffer spring 24 is sleeved outside the fixed mounting rod 22, and the two ends of the buffer spring 24 respectively abut against the positioning sleeve 23 and the mounting seat 12.

[0097] In the embodiment, the inner wall of the positioning sleeve 23 is provided with a moving sliding groove 25 along the length direction, and a limiting pin 26 is slidingly arranged in the moving sliding groove 25, and the limiting pin 26 is fixedly installed on the outer side wall of the fixed installation rod 22, so that the movable connection between the positioning sleeve 23 and the fixed installation rod 22 is realized. In order to avoid the limiting pin 26 from sliding out of the moving sliding groove 25, the limiting cover 27 is threadedly installed at the end of the positioning sleeve 23.

[0098] In addition, the end of the positioning sleeve 23 away from the mounting seat 12 has a chamfer structure. When the positioning member enters the inside of the end cover of the valve to be machined 101, the chamfer structure can guide the positioning sleeve 23 to enter. When the three positioning sleeves 23 are completely inserted into the inner hole of the end cover of the valve to be machined 101, the coaxial positioning of the valve to be machined 101 is completed. At the same time, the milling cutter 13 coaxially arranged with the positioning sleeve 23 gradually approaches the valve to be machined 101 and performs milling operation on the end cover of the valve to be machined 101.

[0099] In addition, the outer diameter of the positioning sleeve 23 matches the inner hole diameter of the end cover of the valve to be machined 101, and when the three positioning sleeves 23 are all inserted into the inner hole of the end cover of the valve to be machined 101, the valve to be machined 101 is completely positioned, and at this time the milling assembly 2 can perform accurate milling operation on the end cover of the valve to be machined 101.

[0100] Embodiment 2:

[0101] On the other hand, the application also discloses a valve automatic milling method, which adopts the valve automatic milling device, and comprises the following steps of:

[0102] S100, loading and correcting deviation, placing the valve to be machined 101 into the positioning groove 10 and conveying and moving along with the conveying positioning strip 9, and at the same time, the top of the valve to be machined 101 is positionally corrected by the guide positioning strip 7 until the vertical state.

[0103] Specifically, after the valve to be machined 101 is placed into the positioning groove 10, the conveying positioning strip 9 drives the valve to be machined 101 to move to one side of the milling assembly 2, and in this process, the guide positioning strip 7 is inclined upward along the running direction of the valve to be machined 101 and is in a folding state, and when the valve to be machined 101 is positionally inclined, the guide positioning strip 7 can gradually correct the position of the valve to be machined 101. Finally, when the valve to be machined 101 reaches the position of the positioning support strip 6, the valve to be machined 101 is erected on the upper surface of the positioning support strip 6, and at this time the valve to be machined 101 is in a vertical state.

[0104] It should be noted that the operation of placing the valve to be machined 101 into the positioning groove 10 can be completed by a mechanical hand, which performs the grabbing and placing of the valve to be machined 101, and the position offset degree is not large, and the guiding positioning strip 7 can be used for correction operation.

[0105] S200, coaxial positioning, when the valve to be machined 101 is transmitted to the milling position by the transmission positioning strip 9, the three positioning sleeves 23 are respectively inserted into the three end cover holes of the valve, and coaxial positioning is performed.

[0106] Specifically, the positioning sleeve 23 is coaxially arranged with the milling cutter 13, when the positioning sleeve 23 completely enters the end cover inner hole of the valve to be machined 101 and is in close contact with the end cover inner hole of the valve to be machined 101, the positioning sleeve 23, the milling cutter 13 and the end cover inner hole of the valve to be machined 101 are coaxial, realizing the coaxial positioning of the three, and ensuring the accurate milling of the end cover of the valve to be machined 101 by the milling cutter 13.

[0107] S300, synchronous milling, the three milling assemblies 2 respectively mill the three end faces of the valve to be machined 101, and the milling process of the valve to be machined 101 is completed.

[0108] Specifically, the three milling assemblies 2 respectively approach the three end covers of the valve to be machined 101, and perform synchronous milling operation on the end covers of the valve to be machined 101.

[0109] S400, continuous operation, according to the above steps, the valve to be machined 101 is milled one by one, and the continuous automatic milling of the valve to be machined 101 is realized.

[0110] Specifically, the conveying assembly 4 conveys the valve to be machined 101 to the position of the milling assembly 2 one by one, when the valve to be machined 101 reaches the position of the milling assembly 2, the conveying assembly 4 stops running, waits for the current valve to be machined 101 to complete the milling operation, after the current valve to be machined 101 completes the milling operation, the conveying assembly 4 continues to convey the valve to be machined 101, and the above operation is repeated, realizing the continuous milling operation of the valve to be machined 101.

[0111] The above is the preferred embodiment of the present application, it should be noted that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A valve automatic milling device, characterized by: The utility model relates to a valve end cover milling machine, including: Rack (1), the rack (1) is erected on the ground to be installed; Milling assembly (2), the milling assembly (2) is installed on the rack (1), and the milling assembly (2) is used for milling operation to valve end cover, and the milling assembly (2) includes: Mounting seat (12), driving sleeve (14) is rotatably installed on the mounting seat (12); Milling cutter (13), the milling cutter (13) is threadedly installed at the end of driving sleeve (14), and the rotating direction of the milling cutter (13) is opposite to the mounting fastening direction; Milling motor (15), the milling motor (15) is fixedly installed on the mounting seat (12), and the milling motor (15) is drivingly connected with the driving sleeve (14); Positioning assembly (3), the positioning assembly (3) is arranged on the milling assembly (2), and the positioning assembly (3) is used for the axial positioning of valve end cover, and the positioning assembly (3) includes: Fixed mounting rod (22), the fixed mounting rod (22) is threadedly installed on the mounting seat (12), and the fixed mounting rod (22) is located in the driving sleeve (14) inside; Positioning sleeve (23), the positioning sleeve (23) is slidably arranged outside the fixed mounting rod (22), and the positioning sleeve (23) slides along the length direction of the fixed mounting rod (22), and the end, away from the mounting seat (12) of the positioning sleeve (23), has chamfer structure; Buffer spring (24), the buffer spring (24) is sleeved outside the fixed mounting rod (22), and the two ends of the buffer spring (24) are respectively abutted with the positioning sleeve (23) and the mounting seat (12); Conveying assembly (4), the conveying assembly (4) is installed on the rack (1), and the conveying assembly (4) is used to convey the valve to be processed; The conveying assembly (4) includes: Bearing conveying strip (5), the bearing conveying strip (5) is installed on the rack (1), and the bearing conveying strip (5) is used for positioning and conveying the valve to be processed; Positioning support strip (6), the positioning support strip (6) is fixedly provided with two, and the two positioning support strips (6) are located above the bearing conveying strip (5), and the positioning gap for positioning the valve to be processed is formed between the two positioning support strips (6); Guide positioning strip (7), the guide positioning strip (7) is fixedly arranged at the feeding end of the positioning support strip (6), and the guide positioning strip (7) is in the shape of inclined downward "eight" character.

2. A valve automatic milling device according to claim 1, characterized in that: The bearing conveying strip (5) includes: Transmission roller (8), the transmission roller (8) is provided with two, and the two transmission rollers (8) are rotatably installed on the rack (1); Transmission positioning strip (9), the transmission positioning strip (9) is provided with a plurality of, and the transmission positioning strips (9) are hinged, the transmission positioning strip (9) is drivingly connected on the two transmission rollers (8), and the transmission positioning strip (9) is provided with the positioning groove (10) matched with the bottom of the valve to be processed. A conveying motor (11) is fixedly installed on the frame (1), and the conveying motor (11) is in transmission connection with one of the transmission rollers (8).

3. A valve automatic milling device according to claim 2, characterized in that: The distance between the two transmission rollers (8) is greater than the length of the positioning support strip (6).

4. The valve automatic milling device of claim 1, wherein: The milling assembly (2) is provided with three, and two of the milling assemblies (2) perform horizontal direction milling operation, and the third milling assembly (2) performs vertical direction milling operation.

5. The valve automatic milling device according to claim 1, characterized in that: The two milling assemblies (2) performing horizontal direction milling operation are installed through horizontal driving members, and the horizontal driving members comprise: Two guide rails (16) are provided in parallel, and the two guide rails (16) are fixedly installed on the frame (1); Two driving seats (17) are provided, the two driving seats (17) are slidingly installed on the guide rails (16), and the mounting seat (12) is fixedly installed on the driving seat (17); A synchronous driving screw (18) is rotatably installed on the frame (1), and the synchronous driving screw (18) is in threaded connection with the two driving seats (17); A traveling motor (19) is fixedly installed on the frame (1), and the traveling motor (19) is in transmission connection with the synchronous driving screw (18).

6. The valve automatic milling device of claim 1, wherein: The milling assembly (2) performing vertical direction milling operation is installed through vertical traveling members, and the vertical traveling members comprise: A positioning frame (20) is fixedly installed on the frame (1), and the mounting seat (12) is slidingly installed on the positioning frame (20); A lifting cylinder (21) is fixedly installed on the inner top surface of the positioning frame (20), and the output end of the lifting cylinder (21) is connected with the mounting seat (12).

7. A valve automatic milling method using the valve automatic milling device according to any one of claims 1 to 6, characterized by: Comprise: Material loading deviation correction, the valve to be processed is placed into the positioning groove (10), and is transported and moved along with the transmission positioning strip (9), at the same time, the top of the valve to be processed is positionally corrected through the guide positioning strip (7) until vertical state; Coaxial positioning, when the valve to be processed is transmitted to the milling position through the transmission positioning strip (9), three positioning sleeves (23) are respectively inserted into three end cover holes of the valve, and coaxial positioning is performed; Synchronous milling, three milling assemblies (2) respectively mill three end faces of the valve to be processed, and the milling process of the valve to be processed is completed; Continuous operation, according to the above steps, the valve to be processed is sequentially milled to realize continuous and automatic milling of the valve to be processed.

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