A hard sealing butterfly valve seat sealing ring processing machine and a processing method thereof

Abstract

The application relates to the technical field of machine tool processing, in particular to a hard sealing butterfly valve seat sealing ring processing machine tool and a processing method thereof. The machine tool comprises a bed body, a bed body guide rail is arranged on the top of the bed body, a large supporting plate is slidably arranged on the bed body guide rail, a transmission support is arranged on one side of the large supporting plate, an obliquely arranged tooling is arranged on the top of one end of the bed body through a machine tool main shaft, a disc-shaped tooling transmission disc is arranged on the outer side of the tooling, the tooling is used for fixing a workpiece, the workpiece is a circular valve seat, and a rotating disc is arranged on the transmission support and located on the two sides of the tooling transmission disc. In the hard sealing butterfly valve seat sealing ring processing machine tool and the processing method thereof, the large supporting plate moves leftward and rightward along with the tooling, and the moving speed and the oblique degree are the same frequency, so that the cutter arranged on the large supporting plate and the workpiece move leftward and rightward at the same frequency during turning processing, that is, the cutter is always in the processing state of the workpiece, and the intermittent cutting of the existing process is avoided.

Description

Technical Field

[0001] This invention relates to the field of machine tool processing technology, and more specifically, to a machine tool and processing method for machining the valve seat sealing ring of a hard-seal butterfly valve. Background Technology

[0002] In recent years, with the development of butterfly valve processing technology, the application of pure metal hard-seal butterfly valves has gradually increased, and the number of manufacturers and the annual demand for these products have also gradually increased.

[0003] However, due to the special nature of its sealing structure, the valve seat and sealing ring must be machined using eccentric tooling. This eccentric rotation increases the machining stroke of the machine tool, lengthens the machining time, and causes intermittent cutting, leading to rapid tool wear and significant waste of materials (tools, electricity) and labor. This results in low production efficiency, increased product price, and low production capacity, severely restricting the development and application of pure metal butterfly valves. The low machining efficiency, significant waste of manpower and resources, high product cost, and high selling price of pure metal hard-seal butterfly valves necessitate a thorough solution to the key bottlenecks restricting the development of pure metal hard-seal butterfly valves. Summary of the Invention

[0004] The purpose of this invention is to provide a machine tool and method for processing the valve seat and sealing ring of a hard-seal butterfly valve, so as to solve the problems of low processing efficiency, large waste of manpower and material resources, high product cost and high selling price of pure metal hard-seal butterfly valve seats and sealing rings mentioned in the background art, and to completely solve the key bottleneck problem restricting the development of pure metal hard-seal butterfly valves.

[0005] To achieve the above objectives, the present invention provides a machine tool for processing hard-seal butterfly valve seat sealing rings, including a bed, a bed guide rail mounted on the top of the bed, a large support plate slidably mounted on the bed guide rail, a transmission bracket mounted on one side of the large support plate, and an inclined tooling transmission disc mounted on one end of the top of the bed via the machine tool spindle. A disc-shaped tool is mounted on the outer side of the tooling transmission disc, the tool fixing the workpiece to be processed, the workpiece being a circular valve seat. Turntables are mounted on both sides of the tooling transmission disc on the transmission bracket, and the outer surfaces of the turntables abut against the tooling transmission disc. On the outer wall; when the tooling rotates, the tooling transmission disc on the tooling transmits the circumferential motion of the machine tool spindle to the turntables on the left and right sides of the tooling transmission disc. The turntables rotate accordingly. Since the tooling transmission disc is set at an angle, its position is constantly changing during the rotation process. The rotating surface of the turntable is in continuous contact with the surface of the tooling transmission disc, forcing the turntable to follow the position change of the tooling transmission disc. Since the turntable is fixed on the transmission bracket, and the turntable can only rotate and cannot move, the power is transmitted to the transmission bracket. The transmission bracket drives the large pallet to move, thus converting the power of the circumferential motion of the machine tool spindle into the left and right linear motion of the large pallet.

[0006] As a preferred embodiment of the present invention, a middle pallet is installed on the large pallet, a small pallet is installed on the middle pallet, a tool holder is installed on the small pallet, and a tool is installed on the tool holder near the workpiece.

[0007] As a preferred embodiment of the present invention, a lead screw assembly is installed inside the large pallet, and a handle is installed at the outer end of the lead screw assembly. The lead screw assembly drives the middle pallet to move linearly, and the movement direction of the middle pallet is perpendicular to the movement direction of the large pallet.

[0008] As a preferred embodiment of the present invention, a lead screw assembly is installed inside the middle support plate, and a handle is installed at the outer end of the lead screw assembly. The lead screw assembly drives the tool holder to make slight left and right adjustments.

[0009] This invention also provides a machining method for a hard-seal butterfly valve seat sealing ring machining machine, which includes the following steps:

[0010] S1. Place the machine tool in place and install a transmission bracket on the large pallet;

[0011] S2. Install a tooling with an inclination on the machine tool spindle, and add a tooling transmission disc around the outer circle of the tooling to make it a whole with the tooling;

[0012] S3. When the machine tool spindle rotates, the power of the machine tool spindle rotation is transmitted to the machine tool's large pallet through the transmission bracket. The rotation of the tooling drives the tooling transmission plate to tilt and rotate, which in turn drives the large pallet to move left and right through the transmission bracket. The distance and speed of the movement are matched with the angle and speed of the tooling.

[0013] S4. Install and fix the workpiece to be machined in the positioning position of the fixture. The machine tool spindle drives the fixture to rotate, and the fixture drives the workpiece to rotate. The workpiece is then machined by a cutting tool.

[0014] As a preferred embodiment of the present invention, in step S4, the tool holder is moved by using the middle and small support plates mounted on the large support plate, thereby moving the tool so that it contacts and performs turning on the workpiece.

[0015] As a preferred embodiment of the present invention, in step S4, the machining position of the tool during the turning process is controlled by moving the middle support plate.

[0016] As a preferred embodiment of the present invention, the dimensions of the turning process are controlled by moving the large pallet and the small pallet, thereby completing the turning process of the workpiece.

[0017] As a preferred embodiment of the present invention, the inclination angle of the tooling transmission disc relative to the vertical direction is 15°-30°.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. In the machining tool and machining method for the valve seat sealing ring of the hard-seal butterfly valve, since the large support plate moves left and right with the tooling and the speed of movement is the same as the inclination, the tool mounted on the large support plate and the workpiece move left and right at the same frequency during turning. That is, the tool is always in the machining state of the workpiece, avoiding the intermittent cutting of the existing process, ensuring the machining quality, and reducing the impact damage to the tool caused by intermittent cutting.

[0020] 2. In the machining tool and machining method for the valve seat sealing ring of the hard-seal butterfly valve, since the cutting tool is in continuous contact with the workpiece during turning, the cutting tool's stroke is only the thickness stroke of the valve seat itself. This avoids the problems of large machining stroke, long machining time, low machining accuracy, and low efficiency caused by the independent movement of the cutting tool and the valve seat in the existing machining process. It increases the existing machining speed by more than 5 times, increases the production efficiency of the equipment, improves the machining accuracy, and reduces the overall production cost of butterfly valve products.

[0021] 3. In the machining tool and machining method for the valve seat sealing ring of the hard-seal butterfly valve, two turntables are installed on the transmission bracket. The two turntables contact the front and back surfaces of the tooling transmission plate from the left and right, respectively. This avoids the backlash when the tooling transmission plate drives the large support plate to move left and right, thus improving the transmission progress and sensitivity. At the same time, since it is the contact surface of the turntable, the turntable makes rotational contact with the contact surface of the tooling transmission plate without friction, which increases the service life of high-speed transmission while ensuring transmission accuracy. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the planar structure of the present invention.

[0024] The meanings of the labels in the diagram are as follows:

[0025] 1. Bed; 11. Bed guide rail; 12. Machine tool spindle; 13. Tooling transmission plate; 14. Tooling; 2. Large pallet; 3. Transmission bracket; 31. Turntable; 4. Middle pallet; 5. Small pallet; 6. Tool post; 61. Tool; 7. Workpiece. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] This invention provides a machine tool for processing the valve seat sealing ring of a hard-seal butterfly valve, such as... Figures 1-2 As shown, the machine includes a bed 1, a bed guide rail 11 mounted on the top of the bed 1, a large support plate 2 slidably mounted on the bed guide rail 11, a transmission bracket 3 mounted on one side of the large support plate 2, and an inclined tooling transmission disc 13 mounted on one end of the top of the bed 1 via the machine tool spindle 12. A disc-shaped tooling 14 is mounted on the outer side of the tooling transmission disc 13, fixing the workpiece 7 to be machined. The workpiece 7 is a circular valve seat. Turntables 31 are mounted on both sides of the tooling transmission disc 13 on the transmission bracket 3, and the outer surface of the turntables 31 abuts against the outer wall of the tooling transmission disc 13. When the tooling 14 rotates, the tooling transmission disc 13 on the tooling 14... The circular motion of the machine tool spindle 12 is transmitted to the turntables 31 on the left and right sides of the tooling transmission disk 13. The turntables 31 rotate accordingly. Since the tooling transmission disk 13 is inclined, its position changes continuously during the rotation process. The rotating surface of the turntable 31 is in continuous contact with the surface of the tooling transmission disk 13, forcing the turntable 31 to follow the position change of the tooling transmission disk 13. Since the turntable 31 is fixed on the transmission bracket 3, and the turntable 31 can only rotate and cannot move, the power is transmitted to the transmission bracket 3. The transmission bracket 3 drives the large pallet 2 to move, thus converting the power of the circular motion of the machine tool spindle 12 into the left and right linear motion of the large pallet 2.

[0028] The rotating rod of the machine tool spindle 12 drives the inclined tooling transmission plate 13 to rotate, which in turn causes the transmission bracket 3 to move, driving the large pallet 2 to move. This completes the conversion of the power of the circular motion of the machine tool spindle 12 into the left and right linear motion of the large pallet 2. Since the large pallet 2 moves left and right with the tooling 14 and the speed of the movement is in sync with the inclination, the tool 61 mounted on the large pallet 2 and the workpiece 7 move left and right in sync during the turning process. In other words, the tool 61 is always in the state of machining the workpiece 7, avoiding the intermittent cutting of the existing process, ensuring the machining quality, and reducing the impact damage to the tool 61 caused by intermittent cutting.

[0029] In this embodiment, a middle pallet 4 is installed on the large pallet 2, a small pallet 5 is installed on the middle pallet 4, a tool holder 6 is installed on the small pallet 5, and a tool 61 is installed on the tool holder 6 near the workpiece 7 for processing the workpiece 7.

[0030] Specifically, a lead screw assembly is installed inside the large pallet 2, and a handle is installed at the outer end of the lead screw assembly. The lead screw assembly drives the middle pallet 4 to move linearly. The movement direction of the middle pallet 4 is perpendicular to the movement direction of the large pallet 2, thereby realizing the movement of the middle pallet 4.

[0031] Furthermore, a lead screw assembly is installed inside the middle support plate 4, and a handle is installed at the outer end of the lead screw assembly. The lead screw assembly drives the tool holder 6 to make fine adjustments left and right, thereby achieving fine adjustments to the processing dimensions.

[0032] This invention also provides a machining method for a hard-seal butterfly valve seat sealing ring machining machine, which includes the following steps:

[0033] S1. Place the machine tool in place and install a transmission bracket 3 at the large pallet 2;

[0034] S2. Install a tooling 14 with an inclination on the machine tool spindle 12, and add a tooling transmission disk 13 around the outer circle of the tooling 14 so that it forms a whole with the tooling 14.

[0035] S3. When the machine tool spindle 12 rotates, the power of the machine tool spindle 12 is transmitted to the machine tool's large pallet 2 through the transmission bracket 3. The rotation of the tooling 14 drives the tooling transmission disk 13 to tilt and rotate, and then drives the large pallet 2 to move left and right through the transmission bracket 3. The distance and speed of its movement are matched with the angle and speed of the tooling 14.

[0036] S4. Install and fix the workpiece 7 to be processed in the positioning position of the tooling 14. The machine tool spindle 12 drives the tooling 14 to rotate, and the tooling 14 drives the workpiece 7 to rotate. The workpiece 7 is then turned by the tool 61.

[0037] Furthermore, in step S4, the tool holder 6 is moved by using the middle support plate 4 and the small support plate 5 mounted on the large support plate 2, thereby moving the tool 61 so that it contacts and performs turning on the workpiece 7.

[0038] Furthermore, in step S4, the machining position of the tool 61 during the turning process is controlled by moving the middle support plate 4, so that the position of the tool 61 can be flexibly adjusted.

[0039] Furthermore, the dimensions of the turning process are controlled by moving the large pallet 2 and the small pallet 5, thereby completing the turning process of the workpiece 7.

[0040] Furthermore, the inclination angle of the tooling transmission disc 13 relative to the vertical direction is 15°-30°, preferably 15° in this embodiment, to ensure a small range of movement of the transmission bracket 3.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A machine tool for processing valve seat sealing rings of hard-seal butterfly valves, comprising a bed (1), characterized in that: A bed guide rail (11) is installed on the top of the bed (1), and a large support plate (2) is slidably arranged on the bed guide rail (11). A transmission bracket (3) is installed on the left side of the large support plate (2). An inclined fixture (14) is installed on the top left end of the bed (1) through the machine tool spindle (12). A disc-shaped fixture transmission disc (13) is installed on the outside of the fixture (14). The fixture (14) fixes the workpiece (7) to be processed. The workpiece (7) is a circular valve seat. Turntables (31) are installed on both the left and right sides of the fixture transmission disc (13) on the transmission bracket (3). The outer surface of the turntables (31) abuts against the outer wall of the fixture transmission disc (13). When the fixture (14) rotates, the fixture (14) on the machine tool spindle (14) The tooling transmission disk (13) transmits the circular motion of the machine tool spindle (12) to the turntables (31) on the left and right sides of the tooling transmission disk (13). The turntables (31) rotate accordingly. Since the tooling transmission disk (13) is set at an angle, its position changes continuously during the rotation process. The rotating surface of the turntable (31) is in continuous contact with the surface of the tooling transmission disk (13), forcing the turntable (31) to follow the position change of the tooling transmission disk (13). Since the turntable (31) is fixed on the transmission bracket (3), and the turntable (31) can only rotate and cannot move, the power is transmitted to the transmission bracket (3). The transmission bracket (3) drives the large pallet (2) to move, thus converting the power of the circular motion of the machine tool spindle (12) into the left and right linear motion of the large pallet (2).

2. The machine tool for processing the valve seat sealing ring of the hard-seal butterfly valve according to claim 1, characterized in that: A middle pallet (4) is installed on the large pallet (2), a small pallet (5) is installed on the middle pallet (4), a tool holder (6) is installed on the small pallet (5), and a tool (61) is installed on the tool holder (6) near the workpiece (7).

3. The machine tool for processing the valve seat sealing ring of the hard-seal butterfly valve according to claim 2, characterized in that: The large pallet (2) is equipped with a lead screw assembly inside, and a handle is installed at the outer end of the lead screw assembly. The lead screw assembly drives the middle pallet (4) to move linearly, and the direction of movement of the middle pallet (4) is perpendicular to the direction of movement of the large pallet (2).

4. The machine tool for processing the valve seat sealing ring of the hard-seal butterfly valve according to claim 2, characterized in that: The middle support plate (4) is equipped with a lead screw assembly, and a handle is installed at the outer end of the lead screw assembly. The lead screw assembly drives the tool holder (6) to make slight adjustments left and right.

5. A processing method for a hard-seal butterfly valve seat sealing ring processing machine tool, used in any one of claims 2-4, characterized in that: Includes the following steps S1. Place the machine tool in place and install a transmission bracket (3) at the large pallet (2). S2. Install a tooling (14) with an inclination on the machine tool spindle (12), and add a tooling transmission disc (13) around the outer circle of the tooling (14) so ​​that it forms a whole with the tooling (14); S3. When the machine tool spindle (12) rotates, the power of the machine tool spindle (12) is transmitted to the machine tool's large pallet (2) through the transmission bracket (3). The tooling (14) rotates on its own, causing the tooling transmission disk (13) to tilt and rotate. Then, the transmission bracket (3) drives the large pallet (2) to move left and right. The distance and speed of its movement are matched with the angle and speed of the tooling (14). S4. Install the workpiece (7) to be processed in the positioning position of the tooling (14) and fix it. The machine tool spindle (12) drives the tooling (14) to rotate, and the tooling (14) drives the workpiece (7) to rotate. The workpiece (7) is turned by the cutting tool (61).

6. The processing method of the hard-seal butterfly valve seat sealing ring processing machine tool according to claim 5, characterized in that: In step S4, the tool holder (6) is moved by using the middle plate (4) and the small plate (5) installed on the large plate (2), and then the tool (61) is moved so that it contacts and performs turning on the workpiece (7).

7. The processing method of the hard-seal butterfly valve seat sealing ring processing machine tool according to claim 5, characterized in that: In step S4, the machining position of the cutting tool (61) during the turning process is controlled by moving the middle support plate (4).

8. The processing method of the hard-seal butterfly valve seat sealing ring processing machine tool according to claim 5, characterized in that: The dimensions of the turning process are controlled by moving the large pallet (2) and the small pallet (5), thereby completing the turning process of the workpiece (7).

9. The processing method of the hard-seal butterfly valve seat sealing ring processing machine tool according to claim 5, characterized in that: The tooling transmission disc (13) is tilted at an angle of 15°-30° relative to the vertical direction.

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