A cutting device for machining ball valves

Abstract

This invention relates to the field of ball valve manufacturing and processing technology, specifically to a cutting device for ball valve processing, comprising: a machine tool body, on which a three-jaw chuck and a tool post are mounted, a cutting tool is mounted on the tool post, a chip removal and tool stabilizing mechanism is disposed on the tool post, and a reversing clamping part is disposed on the machine tool body and the three-jaw chuck. The reversing clamping part is adapted to remove the workpiece from the three-jaw chuck and, after reversing its direction, fix the workpiece again on the same axis to accurately rotate the workpiece. During the reversal process, the workpiece is always fixed in the same axis. Even if reclamped, it can ensure that the axis of the workpiece is always in the same straight line, ensuring coaxial multiple clamping, thereby effectively avoiding repeated positioning errors and ensuring the accuracy of subsequent cutting processing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ball valve production and processing, in particular to a cutting device for ball valve processing. BACKGROUND

[0002] The ball valve is a valve in which the opening and closing member (ball) is driven by the valve stem and rotates around the ball valve axis. As a key fluid control component, the ball valve is widely used in various industrial pipeline systems such as petroleum, chemical industry, natural gas, and power due to its small flow resistance, good sealing performance, and rapid opening and closing. The core component, the valve core (ball), is the absolute core of the entire valve in terms of function execution and performance guarantee. The valve core directly determines the sealing performance, which is the most fundamental and important function of the valve core. In addition, the valve core is also the main load carrier of the medium, so the processing quality of the valve core, especially the roundness and surface roughness of the ball, directly determines the sealing performance and service life of the ball valve.

[0003] During the cutting process of the blank to form the ball valve core, the valve core is a spherical part, and its spherical surface needs to be completely processed. However, in actual processing, only half of the spherical surface can be processed at a time, but the part clamped by the clamp cannot be processed. Therefore, the direction must be reversed and re-clamped to process the remaining part to form a complete and continuous spherical surface. However, repeated positioning errors cannot be avoided during multiple manual clamping, which causes cumulative errors, reduces the coaxiality of the valve core center and the flow passage hole, or causes imperfect connection of the processed parts, resulting in tool marks or profile deviations, which in turn leads to poor valve sealing or excessive operating torque. In addition, since the spherical valve core itself is a convex curved surface, the cutting tool lacks a natural discharge channel during cutting. Unlike on flat or external cylindrical surfaces, the cutting chips can be smoothly thrown forward or to one side. Thin and long soft cutting chips are easily entangled on the workpiece or tool, which can scratch the processed surface during continuous cutting, causing scratches on the valve core surface and affecting the sealing performance of the ball valve. SUMMARY

[0004] The purpose of the present application is to provide a cutting device for ball valve processing to solve the above problems.

[0005] To achieve the above purpose, the present application provides a cutting device for ball valve processing, comprising:

[0006] A machine tool main body, the machine tool main body has a three-jaw chuck and a tool holder, the tool holder is installed with a cutting tool;

[0007] A chip evacuation and tool stability mechanism is provided on the tool holder, which is capable of being advanced forward relative to the tool holder to press against the overhang portion of the cutting tool, and which is adapted to continuously suck in chips during cutting;

[0008] A direction changing clamping unit is provided on the machine tool body and the three-jaw chuck, which is adapted to remove the workpiece from the three-jaw chuck, change the direction, and then fix the workpiece again with the same axis to accurately change the direction of the workpiece.

[0009] Further, the direction changing clamping unit comprises:

[0010] A linear module is provided on the machine tool body in the same direction as the three-jaw chuck;

[0011] An end arm is hinged to the mover of the linear module;

[0012] A main arm is slidingly inserted into the end arm and extends to one side of the three-jaw chuck;

[0013] A swing cylinder is provided on the mover of the linear module, and the output end of the swing cylinder is connected to the end arm, which is capable of driving the end arm to swing back and forth in the radial plane of the three-jaw chuck;

[0014] An electric push rod is provided on the end arm, and the output end of the electric push rod is connected to the main arm upward;

[0015] A motor is provided at the end of the main arm;

[0016] A suspension rod is connected to the output end of the motor, and the end of the suspension rod is a right angle;

[0017] A bowl is fitted on the end of the suspension rod;

[0018] A suction assembly is provided on the bowl;

[0019] Three guide assembly columns are circumferentially connected to the back of the bowl;

[0020] Three holes are respectively provided on the three jaws of the three-jaw chuck in the circumferential direction;

[0021] A clamping assembly is provided on the three-jaw chuck.

[0022] Further, the suction assembly comprises:

[0023] A vacuum chuck is installed on the inner bottom of the bowl, and the vacuum chuck is in the center of the bowl;

[0024] A main pipe is inserted from the back of the bowl and connected with the vacuum chuck;

[0025] A hard pipe is inserted into the main pipe at one end and connected with a first external negative pressure device through a hose at the other end;

[0026] The hard pipe is fixed on the suspension rod.

[0027] Further, the chucking assembly further comprises:

[0028] An iron ring is installed on the pipe opening of the main pipe;

[0029] A first annular electromagnet is arranged on the hard pipe and connected with an external power source;

[0030] The first annular electromagnet is attached to the iron ring.

[0031] Further, the chip removal and tool stabilizing mechanism comprises:

[0032] A hand screwing shaft is rotatably installed on the tool holder;

[0033] A second annular electromagnet is embedded in the tool holder, and the hand screwing shaft passes through the second annular electromagnet;

[0034] An oscillating arm is fixed on the hand screwing shaft at one end and extends forward of the tool holder at the other end;

[0035] A contact member is connected with the other end of the oscillating arm, and rotating the hand screwing shaft swings the oscillating arm towards the cutting tool, so that the contact member can be rested on two mutually perpendicular surfaces of the cutting tool.

[0036] Further, the chip removal and tool stabilizing mechanism further comprises:

[0037] An exposed groove is formed on the contact member, and the opening of the exposed groove is on the same side as the tip of the cutting tool;

[0038] A suction pipe is inserted into the contact member to connect the exposed groove at one end and connected with a second external negative pressure device at the other end.

[0039] Further, the clamping assembly comprises:

[0040] A plurality of groove-shaped members are circumferentially arranged on the three-jaw chuck, and the groove-shaped members are sequentially and evenly arranged with the three clamping jaws of the three-jaw chuck;

[0041] A plurality of clamping members are respectively slidably installed in the groove-shaped members;

[0042] A plurality of first bolts are respectively screw-installed on the groove-shaped members and are respectively rotationally connected to the clamping members, and forward screwing of the first bolts can push the clamping members forward to gradually converge the clamping members towards the center;

[0043] Upper portions of the clamping members are arc-shaped;

[0044] The bowl-shaped member is made of rubber.

[0045] Further, the clamping members are respectively connected with lifting members, and the clamping members are respectively hingedly connected with movable end heads, and the lifting members are respectively screw-installed with second bolts.

[0046] Further, the chip removal stabilizing tool mechanism further comprises:

[0047] An arm is connected with the swing arm;

[0048] A hand screw bolt is screw-installed on the arm;

[0049] The abutting member is provided with a through hole for the hand screw bolt to pass through on a surface parallel to a top surface of the cutting tool.

[0050] Further, the bowl-shaped member and the cantilevered rod member are in interference fit.

[0051] The ball valve machining cutting device can turn the direction of the blank and re-clamp after turning in the process of cutting the blank to form the ball valve spool, and the blank is fixed in the same axial direction during the turning process, so that the axial center of the blank is always in the same straight line, ensuring coaxial clamping multiple times, effectively avoiding repeated positioning errors, ensuring the cutting precision, and the direction turning and clamping part can better adapt to the spherical spool, more fully match the spherical surface and apply clamping force, so as to improve the clamping effect and prevent the clamping force from being too concentrated to cause scratches on the spherical surface of the spool and affect the sealing performance of the ball valve; the chip removal and tool stabilizing mechanism can continuously suck the cutting chips generated during cutting by using strong suction near the cutting position, thereby indirectly forming a discharge channel, so that the cutting chips are passively thrown to one side, effectively preventing the soft and long cutting chips from winding around the workpiece or cutting tool to scratch the machined surface, and the chip removal and tool stabilizing mechanism can limit the long overhanging part of the cutting tool based on the clamping of the tool holder, thereby reinforcing it and avoiding the overhanging part of the cutting tool from vibrating due to cutting force during cutting to cause vibration lines on the machined surface and affect the surface precision of the spool, ensuring the quality of the machined spool. BRIEF DESCRIPTION OF DRAWINGS

[0052] The application will be further described below in combination with the drawings and examples.

[0053] Figure 1 A perspective view of the application is shown;

[0054] Figure 2 A second perspective view of the application is shown;

[0055] Figure 3 A third perspective view of the application is shown;

[0056] Figure 4 A fourth perspective view of the application is shown;

[0057] Figure 5 A fifth perspective view of the application is shown;

[0058] Figure 6 A sixth perspective view of the application is shown;

[0059] Figure 7 A seventh perspective view of the application is shown;

[0060] Figure 8 An eighth perspective view of the application is shown;

[0061] Figure 9 A ninth perspective view of the present invention is shown;

[0062] Figure 10 The present invention is shown. Figure 2 Enlarged view of point A;

[0063] Figure 11 The present invention is shown. Figure 3 Enlarged view of point B;

[0064] Figure 12 The present invention is shown. Figure 4 Enlarged view of point C;

[0065] Figure 13 The present invention is shown. Figure 5 Enlarged view of point D;

[0066] Figure 14 The present invention is shown. Figure 6 Enlarged view of point E;

[0067] Figure 15 The present invention is shown. Figure 6 Enlarged view of point F.

[0068] In the figure, the same reference numerals represent the same structural element, wherein:

[0069] 1. Machine tool body; 2. Three-jaw chuck; 3. Tool post; 4. Cutting tool; 5. Chip removal and tool stabilizing mechanism; 51. Hand-tightening shaft; 52. Second annular electromagnet; 53. Swing arm; 54. Contact component; 55. Exposed groove; 56. Suction tube; 57. Support arm; 58. Hand-tightening bolt; 6. Orientation clamping part; 61. Linear module; 62. End arm; 63. Main arm; 64. Swing cylinder; 65. Electric push rod; 66. Motor; 67. 68. Suspension rod; 69. Bowl-shaped component; 60. Suction assembly; 61. Guide column; 692. Hole; 693. Clamping assembly; 6931. Channel-shaped component; 6932. Clamping component; 6933. First bolt; 6934. Lifting component; 6935. Movable end; 6936. Second bolt; 694. Vacuum suction cup; 695. Main pipe; 696. Rigid pipe; 697. Iron ring; 698. First annular electromagnet. Detailed Implementation

[0070] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0071] like Figures 1-15 As shown, a cutting device for machining ball valves includes:

[0072] Machine tool body 1, three-jaw chuck 2 and tool holder 3 are provided on the machine tool body 1, and the cutting tool 4 is installed on the tool holder 3. Generally, numerical control lathe is used for cutting machining when machining valve core. The three-jaw chuck 2 is a kind of existing machine tool accessory, which is used for clamping and positioning workpiece. The three-jaw chuck 2 is usually installed at the front end of the main shaft of the machine tool body 1. The tool holder 3 is also a kind of existing machine tool accessory, which is used for clamping and fixing the cutting tool 4 to ensure the smooth progress of cutting machining. Here, no more details are given.

[0073] Chip removal and tool stabilizing mechanism 5 is provided on the tool holder 3. The chip removal and tool stabilizing mechanism 5 can protrude forward relative to the tool holder 3 and press against the overhanging part of the cutting tool 4. The chip removal and tool stabilizing mechanism 5 is suitable for continuously sucking the chips during cutting.

[0074] Direction adjusting and clamping part 6 is provided on the machine tool body 1 and the three-jaw chuck 2. The direction adjusting and clamping part 6 is suitable for taking off the workpiece from the three-jaw chuck 2, changing the direction, and then fixing the workpiece again with the same axis to accurately adjust and turn the workpiece. The ball valve machining cutting device can adjust and turn the direction of the blank during the process of cutting machining to form the ball valve core and can re-clamp after turning the direction. Moreover, the blank is always fixed in the same axial direction during the process of turning the direction. Even if it is re-clamped, it can ensure that the axis of the blank is always in the same straight line, ensuring coaxial clamping multiple times, thereby effectively avoiding repeated positioning errors and ensuring the cutting machining precision. In addition, the direction adjusting and clamping part 6 can better and specifically adapt to the spherical valve core, more fully conform to the spherical surface and apply clamping force, so as to improve the clamping effect, ensure the stability of clamping, and prevent the clamping force from being too concentrated to cause scratches and other damages on the spherical surface of the valve core, thereby affecting the sealing performance of the ball valve. Through the chip removal and tool stabilizing mechanism 5, the chips generated during cutting can be continuously sucked away by using strong suction near the cutting position, thereby indirectly forming an exhaust channel to passively make the chips fly to one side, effectively preventing the soft and long chips from winding around the workpiece or the cutting tool 4 to scratch the machined surface. Moreover, the chip removal and tool stabilizing mechanism 5 can limit and reinforce the long overhanging part of the cutting tool 4 based on the clamping and fixing of the tool holder 3, so as to avoid the vibration of the overhanging part of the cutting tool 4 caused by cutting force during cutting machining, thereby affecting the surface precision of the valve core and ensuring the quality of the machined valve core.

[0075] Optionally, the direction adjusting and clamping part 6 comprises:

[0076] A linear module 61 is arranged on the machine tool body 1 coaxially with the three-jaw chuck 2. The linear module 61 can be a linear motor, a ball screw module or the like, and can perform linear reciprocating motion. The mover is a component that performs reciprocating motion on the linear module 61.

[0077] An end arm 62 is hinged to the mover of the linear module 61.

[0078] A main arm 63 is slidably inserted into the end arm 62 and extends to one side of the three-jaw chuck 2.

[0079] A swing cylinder 64 is arranged on the mover of the linear module 61, and the output end of the swing cylinder 64 is connected to the end arm 62. The swing cylinder 64 can drive the end arm 62 to swing back and forth in the radial plane of the three-jaw chuck 2.

[0080] An electric push rod 65 is arranged on the end arm 62, and the output end of the electric push rod 65 is connected to the main arm 63 upward.

[0081] An electric motor 66 is arranged at the end of the main arm 63.

[0082] A suspension rod 67 is connected to the output end of the electric motor 66, and the end of the suspension rod 67 is a right angle.

[0083] A bowl-shaped part 68 is fitted on the end of the suspension rod 67. The axis of the bowl-shaped part 68 and the center point of the suspension rod 67 are both located in the plane of the axis of the three-jaw chuck 2. After the bowl-shaped part 68 is aligned with the three-jaw chuck 2, the bowl-shaped part 68 and the three-jaw chuck 2 are coaxial, and after the bowl-shaped part 68 rotates one hundred and eighty degrees, they can also remain coaxial, so as to ensure that the workpiece clamped on the three-jaw chuck 2 is also coaxial with the bowl-shaped part 68.

[0084] A suction assembly 69 is arranged on the bowl-shaped part 68.

[0085] Three guide assembly columns 691 are circumferentially connected to the back of the bowl-shaped part 68.

[0086] Three holes 692 are respectively formed in the three claws of the three-jaw chuck 2 in the circumferential direction.

[0087] Clamping assembly 693 is arranged on the three-jaw chuck 2. When rough machining is started to cut the blank to preliminarily form the ball valve spool, the blank is first clamped for cutting by the three-jaw chuck 2. At this time, the swing cylinder 64 swings the end arm 62 and the main arm 63 backward, so that the end arm 62 and the main arm 63 are in the upraised state. The bowl 68, the suction assembly 69 and the like are away from the three-jaw chuck 2 to prevent interfering with the cutting. After the end of the blank is machined and the ball is preliminarily formed, the cutting tool 4 is reset and the three-jaw chuck 2 is kept clamping the blank. Then the swing cylinder 64 is driven to swing the end arm 62 and the main arm 63 forward until the end arm 62 is swung to the vertical state. At this time, the bowl 68, the three-jaw chuck 2 and the blank on the three-jaw chuck 2 are coaxial. Then the linear module 61 is driven to move the bowl 68 toward the blank on the three-jaw chuck 2. The bowl 68 gradually covers the machined ball inside. After the suction assembly 69 is in full contact with the blank, the suction assembly 69 is used to firmly suck the blank to realize fixation. Then the three-jaw chuck 2 is loosened to cancel clamping the blank. In this process, the three claws of the three-jaw chuck 2 are loosened to a predetermined position, so that the three holes 692 are aligned with the three guide combination columns 691. Then the linear module 61 drives the bowl 68 and the blank to retreat backward. After leaving sufficient space, the motor 66 is driven to swing the bowl 68 through the suspension rod 67 until the bowl 68 is accurately swung by one hundred and eighty degrees, so as to complete the direction turning of the blank. Then the linear module 61 drives the bowl 68 and the blank to move toward the three-jaw chuck 2 again. The three guide combination columns 691 are gradually inserted into the three holes 692. After the three guide combination columns 691 are completely and tightly inserted into the three holes 692, the clamping assembly 693 is used to clamp the blank to fix the blank. The three-jaw chuck 2 is not used for clamping. After clamping is completed, the fixation of the blank by the suction assembly 69 is canceled. Then the linear module 61 continues to drive the suspension rod 67 to move backward. At this time, since the bowl 68 has been fixed and blocked by the three-jaw chuck 2, the suspension rod 67 can be pulled out from the back of the bowl 68 and the suction assembly 69 is separated. Then the motor push rod 65 is driven to lift the main arm 63, so that the suspension rod 67 completely leaves the back of the bowl 68. Then the swing cylinder 64 swings the end arm 62 and the main arm 63 backward, so that the end arm 62 and the main arm 63 return to the upraised state. Then the cutting of the other end of the blank is started to ensure that the ball-shaped spool is completely machined, the direction turning of the blank is realized and the blank is clamped again. The axial position of the blank is kept consistent before and after clamping, that is, the axial center of the blank is always on the same straight line during cutting, so that coaxial clamping is realized. Thus, the repeated positioning error is effectively avoided, the cutting precision is ensured,The coaxiality of the valve core center and the flow passage hole is guaranteed, and the perfect connection of the two cutting processes is avoided to prevent the appearance of the tool mark or profile deviation, thereby preventing the final output ball valve from being tightly closed or the operation torque being too large; when the clamping assembly 693 clamps the blank again, the fixing of the blank by the suction assembly 69 is maintained, and then the fixing of the blank by the suction assembly 69 is cancelled after the blank is clamped firmly, so that the stability of the blank position during clamping is ensured to prevent the blank from shaking or deviating from the previous clamping position due to the clamping pressure of the clamping assembly 693, thereby ensuring coaxial clamping.

[0088] Optionally, the suction assembly 69 comprises:

[0089] A vacuum chuck 694 is installed on the inner bottom of the bowl-shaped part 68, and the vacuum chuck 694 is located at the center of the bowl-shaped part 68, so that the vacuum chuck 694 can be attached to the center of the blank after the suction assembly 69 fully contacts the blank;

[0090] A main pipe 695 is inserted from the back of the bowl-shaped part 68 and connected to the vacuum chuck 694;

[0091] A hard pipe 696 is inserted into the main pipe 695 at one end and connected to the first external negative pressure device through a hose at the other end. As the bowl-shaped part 68 moves towards the blank on the three-jaw chuck 2, the bowl-shaped part 68 gradually covers the processed side of the ball inside. The vacuum chuck 694 contacts the blank. After the vacuum chuck 694 fully contacts the blank, the first external negative pressure device is started to suck. The vacuum chuck 694 becomes a negative pressure state through the hard pipe 696 and the main pipe 695, generating a strong suction force to firmly suck the blank, thereby fixing the blank and ensuring the stability of the axial position of the blank during subsequent direction adjustment. This ensures the smooth adjustment and re-clamping of the blank direction. The vacuum chuck 694 relies on a strong suction force to fix the blank, has strong applicability, can adapt to blanks of different sizes, and ensures practicality in actual use. The first external negative pressure device is a powerful vacuum pump, which can generate a strong negative pressure to make the vacuum chuck 694 have enough suction force to firmly suck the blank.

[0092] The hard pipe 696 is fixed on the suspension rod 67, and when the suspension rod 67 moves backward, the hard pipe 696 can be pulled out of the main pipe 695, thereby ensuring that the suction assembly 69 can be separated.

[0093] Optionally, the suction assembly 69 further comprises:

[0094] An iron ring 697 is installed at the pipe opening of the main pipe 695;

[0095] A first annular electromagnet 698 is arranged on the hard tube 696 and connected to an external power source;

[0096] The first annular electromagnet 698 is attached to the iron ring 697. In normal state, after the hard tube 696 is inserted into the main pipe 695, the external power source is connected to the first annular electromagnet 698 to generate suction force to firmly hold the iron ring 697, thereby enhancing the tightness of the joint between the hard tube 696 and the main pipe 695, preventing the suction airflow from escaping from the joint to affect the negative pressure strength of the vacuum chuck 694, and ensuring that the workpiece is firmly held by the vacuum chuck 694. When the hard tube 696 is ready to be pulled out of the main pipe 695, the power is turned off to ensure smooth and unobstructed pulling out of the hard tube 696.

[0097] Optionally, the chip removal and tool stabilizing mechanism 5 comprises:

[0098] A hand screw shaft 51 is rotatably mounted on the tool holder 3. During cutting of the sphere, in order to enable the cutting tool 4 to approach the workpiece and complete cutting of the entire spherical surface, the cutting tool 4 needs to have sufficient overhang length to avoid the already machined spherical surface portion, so the cutting tool 4 will have a long overhang, and the longer the tool overhang, the poorer the rigidity, and the more likely the tool will vibrate under the action of cutting force. Such vibration not only leads to poor surface quality of the workpiece, but also affects the tool life.

[0099] A second annular electromagnet 52 is embedded in the tool holder 3, and the hand screw shaft 51 passes through the second annular electromagnet 52. The second annular electromagnet 52 is connected to an external power source.

[0100] An oscillating arm 53 is fixedly sleeved on one end of the hand screw shaft 51 and extends forward of the tool holder 3.

[0101] The contact piece 54 is connected with the other end of the swing arm 53, rotates the hand screw shaft 51, swings the swing arm 53 towards the cutting tool 4, and can make the contact piece 54 lean against two mutually perpendicular surfaces of the cutting tool 4. Before the cutting tool 4 is assembled and cutting is performed, the hand screw shaft 51 is rotated, the swing arm 53 is swung towards the cutting tool 4, until the contact piece 54 is tightly leaned against the two mutually perpendicular surfaces of the cutting tool 4. Then the second annular electromagnet 52 is powered to generate suction force to firmly suck the hand screw shaft 51, thereby fixing the contact piece 54 at the current position. On the basis of the clamping of the tool holder 3, the overhanging part of the cutting tool 4 is indirectly reinforced, the overhanging part of the cutting tool 4 is limited, the possible movement of the overhanging part of the cutting tool 4 is inhibited, the stability of the cutting tool 4 is ensured, the vibration of the overhanging part of the cutting tool 4 due to the cutting force during cutting is effectively prevented, the chatter marks on the surface of the blank due to the vibration of the overhanging part of the cutting tool 4 are prevented, the surface precision of the valve core is ensured, the quality of the processed valve core is ensured, and the cutting edge of the cutting tool 4 is prevented from being subjected to large impact load to accelerate wear or even breakage.

[0102] Optionally, the chip removal and tool stabilizing mechanism 5 further comprises:

[0103] An exposed groove 55 is arranged on the contact piece 54, and the opening of the exposed groove 55 is on the same side as the cutting edge of the cutting tool 4.

[0104] A suction pipe 56 is inserted into the contact piece 54 to connect the exposed groove 55 at one end, and is connected with an external second negative pressure device at the other end. During cutting, the external second negative pressure device is started to begin suction, so that the exposed groove 55 becomes a strong suction inlet through the suction pipe 56, and the thin and long soft chips formed by cutting are continuously sucked away at the position close to the cutting point, thereby indirectly forming a discharge channel to passively make the chips fly to one side, effectively preventing the chips from winding around the workpiece or the cutting tool 4 to scratch the machined surface, and further ensuring the quality of the processed valve core. The second negative pressure device adopts an industrial dust collector or the like to ensure that it can adapt to the work of sucking metal chips.

[0105] Optionally, the clamping assembly 693 comprises:

[0106] A plurality of groove-shaped pieces 6931 are circumferentially arranged on the three-jaw chuck 2, and the plurality of groove-shaped pieces 6931 are sequentially and spacedly arranged with the three clamping jaws of the three-jaw chuck 2.

[0107] A plurality of clamping pieces 6932 are respectively and slidingly installed in the plurality of groove-shaped pieces 6931.

[0108] A plurality of first bolts 6933 are respectively screwed on the plurality of groove-shaped members 6931 and are respectively connected to the plurality of clamping members 6932. Forward rotation of the plurality of first bolts 6933 can push the plurality of clamping members 6932 forward, so that the plurality of clamping members 6932 gradually converge towards the center. After the bowl-shaped member 68 and the blank are in place, the plurality of first bolts 6933 are rotated forward using a socket wrench, the plurality of clamping members 6932 are pushed forward along the groove-shaped members 6931, and the plurality of clamping members 6932 gradually converge towards the center until the middle blank is clamped, thereby ensuring that the blank is firmly clamped for smooth cutting. Electric power or hydraulic pressure can also be used to replace the plurality of first bolts 6933 to drive the plurality of clamping members 6932 to converge towards the center for clamping, so that the plurality of clamping members 6932 simultaneously move towards the center, further preventing the clamping position of the blank from deviating.

[0109] The upper part of the plurality of clamping members 6932 is arc-shaped. When a general three-jaw chuck 2 clamps a sphere, only limited points or short lines can be used to apply pressure for clamping. The sphere is not only clamped by a small number of force points, but also unevenly stressed, which can damage the sphere. The arc-shaped clamping surface of the plurality of clamping members 6932 can better adapt to the sphere and apply clamping force in a large area, thereby improving the clamping effect, ensuring the stability of clamping, preventing the sphere from shaking to affect the cutting quality, and preventing the clamping force from being too concentrated to cause scratches on the spherical surface and affect the sealing performance of the finally manufactured ball valve.

[0110] The bowl-shaped member 68 is made of rubber. When the plurality of clamping members 6932 deform the bowl-shaped member 68 to clamp the blank, the rubber bowl-shaped member 68 serves as a protective cushion between the plurality of clamping members 6932 and the blank, preventing the strong clamping force from damaging the surface of the machined sphere and affecting the surface precision. At the same time, the rubber bowl-shaped member 68 improves the friction and further ensures that the blank is firmly clamped.

[0111] Optionally, the plurality of clamping members 6932 are respectively connected to lifting members 6934, and the ends of the plurality of clamping members 6932 are respectively hinged to movable end heads 6935. The plurality of lifting members 6934 are respectively screwed with second bolts 6936. The diameter of the sphere is not consistent at different positions. After the plurality of clamping members 6932 clamp the blank, the plurality of second bolts 6936 are screwed downward to push and turn the plurality of movable end heads 6935 towards the middle blank, until the bowl-shaped member 68 tightly presses on the blank, thereby forming a group of circumferential clamping forces in different directions with the plurality of clamping members 6932 through the plurality of movable end heads 6935. The plurality of movable end heads 6935 use clamping force towards the side of the plurality of clamping members 6932 to re-clamp the blank relative to the inner buckle type, thereby further adapting and clamping the sphere and effectively preventing the blank from being clamped unstably.

[0112] Optionally, the chip removal and tool stabilizing mechanism 5 further comprises:

[0113] a supporting arm 57 connected to the swing arm 53;

[0114] a hand screw 58 screwed on the supporting arm 57;

[0115] The contact piece 54 has a through hole for the hand screw 58 to pass through on a surface parallel to the top surface of the cutting tool 4. After the contact piece 54 is pressed against the cutting tool 4 to limit the cutting tool 4, the hand screw 58 is screwed down to pass through the contact piece 54, and the hand screw 58 is pressed against the cutting tool 4 from above to further reinforce the cutting tool 4 based on the contact piece 54, further consolidate the tool stabilizing effect, and ensure stable cutting of the cutting tool 4 while preventing the tool stabilizing effect from being affected due to the size difference of the cutting tool 4.

[0116] Optionally, the bowl-shaped piece 68 and the suspension rod piece 67 are in interference fit, that is, the bowl-shaped piece 68 and the suspension rod piece 67 have a certain friction force and can move relative to each other under the action of external force, thereby ensuring that the suspension rod piece 67 can be smoothly pulled out under the drive of the linear module 61 while preventing the bowl-shaped piece 68 from falling off during the direction adjustment of the bowl-shaped piece 68 and the blank, and ensuring smooth direction adjustment.

[0117] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cutting device for machining a ball valve, characterized by, It includes: Machine tool body (1), three-jaw chuck (2) and tool holder (3) are arranged on the machine tool body (1), and cutting tool (4) is arranged on the tool holder (3); Chip removal and tool stabilizing mechanism (5) is arranged on the tool holder (3), the chip removal and tool stabilizing mechanism (5) can be moved forward relative to the tool holder (3), and the chip removal and tool stabilizing mechanism (5) is suitable for continuously sucking chips during cutting; The orientation clamping part (6) is arranged on the machine tool body (1) and the three-jaw chuck (2), and the orientation clamping part (6) is suitable for taking off the workpiece from the three-jaw chuck (2) and fixing the workpiece again with the same axis after reversing, so as to accurately reverse the workpiece; The orientation clamping part (6) includes a linear module (61), the linear module (61) is arranged on the machine tool body (1) in the same direction as the three-jaw chuck (2); An end arm (62) is hinged to the mover of the linear module (61); A main arm (63) is slidably inserted into the end arm (62) and extends to one side of the three-jaw chuck (2); A swing cylinder (64) is arranged on the mover of the linear module (61), and the output end of the swing cylinder (64) is connected with the end arm (62), so that the swing cylinder (64) can drive the end arm (62) to swing back and forth in the radial plane of the three-jaw chuck (2); An electric push rod (65) is arranged on the end arm (62), and the output end of the electric push rod (65) is connected with the main arm (63) upward; A motor (66) is arranged at the end of the main arm (63); A suspension rod (67) is connected with the output end of the motor (66), and the end of the suspension rod (67) is a right angle; A bowl-shaped part (68) is connected with the end of the suspension rod (67); A suction assembly (69) is arranged on the bowl-shaped part (68); Three guide assembly columns (691) are circumferentially connected to the back of the bowl-shaped part (68); Three holes (692) are respectively arranged on the three claws of the three-jaw chuck (2) in the circumferential direction; A clamping assembly (693) is arranged on the three-jaw chuck (2); The swing cylinder (64) can swing the end arm (62) forward to the vertical state, so that the bowl (68), the three-jaw chuck (2) and the workpiece on the three-jaw chuck (2) are coaxial, the motor (66) can swing the bowl (68) by 180 degrees through the suspension rod (67), the three guide assembly columns (691) can be completely inserted into the three holes (692), the clamping assembly (693) can clamp the workpiece through the bowl (68), and the suspension rod (67) can be pulled out from the back of the bowl (68).

2. The ball valve machining cutting device according to claim 1, wherein The suction assembly (69) comprises: a vacuum chuck (694) installed on the inner bottom of the bowl (68), and the vacuum chuck (694) is located at the center in the bowl (68); a main pipe (695) inserted from the back of the bowl (68) and connected with the vacuum chuck (694); a hard pipe (696) inserted into the main pipe (695) at one end and connected with an external first negative pressure device through a hose at the other end; the hard pipe (696) is fixed on the suspension rod (67).

3. The ball valve machining cutting device according to claim 2, wherein The suction assembly (69) further comprises: an iron ring (697) installed at the pipe opening of the main pipe (695); a first annular electromagnet (698) arranged on the hard pipe (696) and connected with an external power supply; the first annular electromagnet (698) is attached to the iron ring (697).

4. The ball valve machining cutting device according to claim 3, wherein The chip removal and tool stabilizing mechanism (5) comprises: a hand screw shaft (51) rotatably installed on the tool holder (3); a second annular electromagnet (52) embedded in the tool holder (3), the hand screw shaft (51) passes through the second annular electromagnet (52), and the second annular electromagnet (52) can generate suction force to firmly hold the hand screw shaft (51) after being electrified; a swing arm (53) fixedly sleeved on the hand screw shaft (51) at one end and extending forward of the tool holder (3) at the other end; a contact piece (54) connected with the other end of the swing arm (53), and the contact piece (54) can be rested on two mutually perpendicular surfaces of the cutting tool (4) by rotating the hand screw shaft (51) to swing the swing arm (53) towards the cutting tool (4).

5. The ball valve machining cutting apparatus according to claim 4, wherein The chip removal and tool stabilizing mechanism (5) further comprises: an exposed groove (55) formed on the contact piece (54), and the opening of the exposed groove (55) is on the same side as the cutting tool (4) tip; a suction pipe (56) inserted into the contact piece (54) to connect the exposed groove (55) at one end and connected with an external second negative pressure device at the other end.

6. The ball valve machining cutting apparatus according to claim 5, wherein The clamping assembly (693) comprises: a plurality of slot-shaped members (6931) circumferentially arranged on the three-jaw chuck (2), and the slot-shaped members (6931) are sequentially and spacedly arranged with the three jaws of the three-jaw chuck (2); a plurality of clamping members (6932) respectively and slidingly installed in the slot-shaped members (6931); a plurality of first bolts (6933) respectively and screwingly installed on the slot-shaped members (6931) and respectively and rotationally connected to the clamping members (6932), and forward screwing of the first bolts (6933) can push the clamping members (6932) forward to gradually centripetally close the clamping members (6932); upper portions of the clamping members (6932) are arc-shaped; the bowl-shaped member (68) is made of rubber.

7. The cutting device for ball valve machining according to claim 6, wherein upper portions of the clamping members (6932) are respectively connected with lifting members (6934), and distal ends of the clamping members (6932) are respectively hingedly connected with movable end heads (6935), and the lifting members (6934) are respectively screwingly installed with second bolts (6936).

8. The ball valve machining cutting device according to claim 7, wherein The chip removal and tool stabilizing mechanism (5) further comprises: an arm (57) connected with the swing arm (53); a hand screw bolt (58) screwingly installed on the arm (57); the contact member (54) is provided with a through hole through which the hand screw bolt (58) passes on a surface parallel to a top surface of the cutting tool (4).

9. The cutting device for ball valve machining according to claim 8, wherein the bowl-shaped member (68) is in interference fit with the cantilevered rod member (67).

Images