CN-121972972-A - Be applied to automation of butterfly valve manufacturing and process equipment

CN121972972ACN 121972972 ACN121972972 ACN 121972972ACN-121972972-A

Abstract

The application relates to the technical field of valve manufacturing equipment and discloses automatic processing equipment applied to butterfly valve manufacturing, which comprises a standing clamping system, a sleeve type double-spindle driving system and a spiral spline clutch and avoidance mechanism, wherein the standing clamping system is used for bearing, clamping and fixing a butterfly valve body to be processed, the sleeve type double-spindle driving system is arranged right above the standing clamping system and comprises an outer spindle sleeve and an inner spindle concentrically penetrating the inner part of the outer spindle sleeve, and the spiral spline clutch and avoidance mechanism is connected between a main transmission motor and the sleeve type double-spindle driving system and is used for distributing the rotation power of the main transmission motor to the inner spindle or the outer spindle sleeve according to the input torque direction. Through the sleeve type double-spindle transmission framework led by the spiral spline clutch and avoidance mechanism, the instantaneous switching of internal and external double-path power and the forced pulling and pulling of an inner cavity turning tool are realized on a pure mechanical level by utilizing the reverse rotation of the torque stress direction when the main transmission motor is in forward and reverse rotation, and the reference drift and accumulated positioning errors caused by repeated hoisting circulation are eliminated.

Inventors

WANG PINGHONG
LIN FENG
LIN TONG
LU YUANCHENG
CAO JUN
LIN JINCAI

Assignees

浙江贝尔控制阀门有限公司

Dates

Publication Date: 20260505
Application Date: 20260323

Claims (10)

1. Be applied to automation processing equipment that butterfly valve was made, characterized in that includes: The static clamping system is used for bearing, clamping and fixing the butterfly valve body to be processed; The sleeve type double-spindle driving system is arranged right above the standing clamping system and comprises an outer spindle sleeve (5) and an inner spindle (6) concentrically penetrating through the outer spindle sleeve (5); The spiral spline clutch and avoidance mechanism is connected between the main transmission motor (7) and the sleeve type double-spindle driving system, and is used for distributing the rotation power of the main transmission motor (7) to the inner spindle (6) or the outer spindle sleeve (5) according to the input torque direction and driving the inner spindle (6) to move upwards along the axial direction to retract when the outer spindle sleeve (5) is driven; The U-shaft profiling turning system is arranged at the bottom end of the inner main shaft (6) and is used for extending into the inner cavity of the butterfly valve body to perform turning; The drilling vibration reduction dual-state multiplexing system is integrated at the bottom end of the outer spindle sleeve (5) and is arranged around the periphery of the U-axis profiling turning system and is used for performing multi-hole synchronous drilling on the end face of the outer ring flange of the butterfly valve body and abutting against the butterfly valve body to provide vibration reduction damping when the U-axis profiling turning system performs turning.
2. The automatic processing device applied to butterfly valve manufacturing according to claim 1, wherein the spiral spline clutch and avoidance mechanism comprises a composite sliding shaft sleeve (8) sleeved on an output shaft of a main transmission motor (7), a straight-tooth internal spline is processed on the upper portion of the inner wall of the composite sliding shaft sleeve (8), an internal spiral spline is processed on the lower portion of the inner wall of the composite sliding shaft sleeve (8), an internally convex annular step check ring (801) is arranged on the lower portion of the inner cavity of the composite sliding shaft sleeve (8), an end face gear (802) is processed on the top end face of the composite sliding shaft sleeve (8), the upper end of the internal spindle (6) extends into the composite sliding shaft sleeve (8), an external spiral spline meshed with the internal spiral spline is processed on the outer wall of the upper end of the internal spindle (6), a limit flange (601) positioned above the annular step check ring (801) is arranged on the top end of the internal spindle (6), and an inverted fixed gear ring (501) matched with the end face gear (802) is processed on the top end of the external spindle sleeve (5).
3. An automated processing equipment applied to butterfly valve manufacturing according to claim 2, characterized in that when the main drive motor (7) outputs a forward cutting torque, the composite sliding sleeve (8) is screwed into a stroke low position, bringing the face gear (802) and the inverted ring gear (501) into a physical disengagement state to rigidly transmit the rotational power to the inner spindle (6) via the inner helical spline; when the main transmission motor (7) outputs reverse torque, the composite sliding shaft sleeve (8) slides upwards along the axial direction, so that the face gear (802) and the inverted fixed gear ring (501) are rigidly meshed to transmit rotary power to the outer spindle sleeve (5), and the annular step check ring (801) is synchronously utilized to lift the limit flange (601) from bottom to top so as to forcedly lift the inner spindle (6) to move upwards.
4. The automatic processing device applied to butterfly valve manufacturing according to claim 1, characterized in that the U-axis profiling turning system comprises a numerical control flat rotating disc (9) coaxially and rigidly connected with the bottom end of an inner main shaft (6), a radial guide rail groove (901) perpendicular to the rotation axis direction of the main shaft is formed in the numerical control flat rotating disc (9), a radial sliding plate (11) used for clamping a turning tool (10) is slidably connected in the radial guide rail groove (901), a U-axis servo motor (12) and a ball screw pair (13) which are in transmission connection are integrated in the numerical control flat rotating disc (9), and the execution end of the ball screw pair (13) is connected with the radial sliding plate (11) and used for driving the radial sliding plate (11) to perform independent radial linear displacement.
5. An automated processing equipment applied to butterfly valve manufacturing according to claim 1, characterized in that the drilling vibration damping dual-state multiplexing system comprises a planetary gear box (14) rigidly fixed on a base of an outer spindle sleeve (5), a central sun wheel (15) fixedly connected with the bottom end of the outer spindle sleeve (5) is arranged in the center of the inside of the planetary gear box (14), a plurality of planet gears (16) distributed in a circumferential array are meshed with the periphery of the central sun wheel (15), the outer wall of a power output shaft of each planet gear (16) is rotationally connected with the planetary gear box (14), a power output shaft of each planet gear (16) penetrates through the planetary gear box (14) downwards and is fixedly connected with a drill power seat (17), self-adaptive elastic damping ejector rod mechanisms (18) are uniformly arranged in a penetrating mode in a gap area between two adjacent drill power seats (17) distributed in a circumferential mode, the tail ends of the self-adaptive elastic damping ejector rod mechanisms (18) are configured with ejector rod cushion blocks, and the space extension positions of the tail ends of the self-adaptive elastic damping ejector rod mechanisms (18) are lower than the positions of drill bits mounted on the drill power seats (17) in a natural extension state.
6. An automated processing apparatus for butterfly valve manufacturing according to claim 5, wherein, when the inner spindle (6) drives the U-axis profiling turning system to perform turning, the outer spindle sleeve (5) maintains a power-off state and performs Z-axis down feeding until all the adaptive elastic damping ram mechanisms (18) synchronously abut and constantly press against the outer ring flange end face of the butterfly valve body, and when the drill power seat (17) performs drilling, the outer spindle sleeve (5) provides rotational power and forces the telescopic rod of the adaptive elastic damping ram mechanisms (18) to retract to a mechanical limit in deep hole pressing feeding.
7. The automatic processing device for butterfly valve manufacturing according to claim 6, wherein the static clamping system comprises a workbench (1) and a plurality of groups of self-adaptive hydraulic flexible ejector rods (2) distributed on the workbench (1) in an annular array, positioning reference grooves (101) matched with the bottom profile of a butterfly valve body are formed in the upper surface of the workbench (1), universal floating contact blocks (3) are mounted at the front end of each group of self-adaptive hydraulic flexible ejector rods (2), the self-adaptive hydraulic flexible ejector rods (2) are used for driving each universal floating contact block (3) to feed in the radial direction until the self-adaptive floating contact blocks are attached to the outer surface of the butterfly valve body at multiple points, a poisson ratio compensation model is preset in a control system of the processing device, when an outer spindle sleeve (5) drives an adaptive elastic damping ejector rod mechanism (18) to downwards press the flange end face of the butterfly valve body, real-time Z-axis downward pressing load is obtained through the control system, radial hydraulic pressure threshold values of the self-adaptive hydraulic flexible ejector rods (2) are synchronously and dynamically lifted based on the poisson ratio compensation model, and the radial expansion tendency of the butterfly valve body due to pressure maintaining is counteracted.
8. The automatic processing device for butterfly valve manufacturing according to claim 7, wherein a micro-pressure pulsation sensor is connected in series on the hydraulic circuit of the self-adaptive hydraulic flexible ejector rod (2), the micro-pressure pulsation sensor is used for collecting hydraulic high-frequency pulsation signals which are radiated outwards and converted into hydraulic fluctuation in the turning process of the outer peripheral side wall of the butterfly valve body in real time, the self-adaptive vibration suppression module is further arranged in the control system and used for sending linkage intervention instructions to the main transmission motor (7) or the U-axis profiling turning system when the amplitude or the frequency of the hydraulic high-frequency pulsation signals is judged to break through a preset safety threshold value, and the rotation speed of the inner spindle (6) or the feeding parameters of the U-axis profiling turning system are dynamically adjusted to actively avoid a cutting resonance area.
9. The automatic processing device for butterfly valve manufacturing according to claim 4, wherein when the inner spindle (6) performs Z-axis linear feeding along the depth of the butterfly valve body, the U-axis servo motor (12) receives a radial coordinate command dynamically changing along with the Z-axis linear feeding depth in real time, and drives the radial slide plate (11) to drive the turning tool (10) to perform radial dynamic advancing and retracting interpolation in a high-speed revolution state.
10. An automated processing apparatus for butterfly valve manufacturing according to claim 1, further comprising a headstock (4), the telescopic dual spindle drive system being mounted within the headstock (4), a plurality of sets of zero clearance rolling guide assemblies (19) being arranged axially between the inner spindle (6) and the outer spindle sleeve (5), the zero clearance rolling guide assemblies (19) being adapted to constrain radial runout of the inner spindle (6) and the outer spindle sleeve (5) and to impart axial sliding and independent rotational degrees of freedom to the inner spindle (6) relative to the outer spindle sleeve (5).

Description

Be applied to automation of butterfly valve manufacturing and process equipment Technical Field The invention relates to the technical field of valve manufacturing equipment, in particular to automatic processing equipment applied to butterfly valve manufacturing. Background The roundness precision of the inner cavity sealing surface of the butterfly valve serving as a core pivot in the industrial fluid control pipe network directly determines the medium interception reliability of the whole pipeline by the coaxiality of the peripheral flange hole system. Because the butterfly valve body essentially belongs to a typical large-diameter and thin-wall tubular casting, the coupling interference of cutting stress and clamping stress is extremely sensitive in the machining process. In the traditional manufacturing circulation mode, the inner cavity curved surface turning and the outer flange multi-hole group drilling of the valve body are usually split into two completely independent procedures, and distributed machining is carried out across a heavy lathe and a multi-shaft drilling machine. The discontinuous operation logic not only causes the process chain in the workshop to be extremely lengthy, but also causes the workpiece to inevitably lose the initial absolute clamping reference in the processes of multiple offline, hoisting and secondary alignment. The accumulated positioning wandering error fundamentally breaks the space geometric association between the inner hole of the valve body and the outer flange group hole, so that the yield of the high-grade high-pressure butterfly valve is difficult to break through. In order to kill the reference drift caused by multi-working-procedure circulation, the composite processing concept gradually penetrates into the field of valve manufacturing, and attempts are made to penetrate through the whole set of cutting actions under single in-situ clamping. However, existing compound machine tools rapidly expose deep physical and structural bottlenecks in the special configuration of straight butterfly valves. The nonlinear contour processing of the sealing surface of the inner cavity of the butterfly valve can force the boring lathe tool equipped with the slender cantilever to go deep into the dark cavity of the valve body. This naturally unsupported cutting attitude, once subject to uneven hardness or sudden cutting-edge changes in the cast blank, induces extremely intense self-excited chatter like a tuning fork, inscribing irreversible catastrophic corrugations in the clean sealing surfaces. To force such damaging high frequency chatter, a compromise commonly employed in the industry is to apply an extremely large vertical hold down dead force from the top flange face of the workpiece using a heavy duty hydraulic mechanism. This purely longitudinally rigid brute force approach inadvertently triggers more concealed and fatal mechanical back-loading when faced with thin-walled structures. When the thin-walled cylindrical valve body is subjected to an overrun axial compression load, the material lattice of the valve body inevitably follows the poisson effect, and a physical trend of radial expansion, namely microscopic upsetting deformation on a macroscopic scale, is generated on the outer side. At this time, since the conventional three-jaw or four-jaw rigid clamp of the side wall is already in a dead-position locking state, the valve body cannot be freely stretched outwards, so that complicated elastic residual stress is rapidly accumulated in the material. When the main shaft of the machine tool is lifted and the clamping jaw is released, the residual stress which is forcefully sealed in the crystal lattice is released instantly like a spring, so that the inner hole which is originally measured to be absolutely round on the machine tool is subjected to severe ovalization rebound deformation. Disclosure of Invention Aiming at the defects of the prior art, the invention provides automatic processing equipment applied to butterfly valve manufacturing, solves the problem that the mechanical conflict of radial abnormal bulge of the side wall of a workpiece and irreversible elliptical rebound is generated after the fixture is unloaded due to the unavoidable triggering of a thin-wall cylinder poisson effect caused by the simple longitudinal mechanical heavy load forced pressing long cantilever deep cavity turning flutter in the traditional butterfly valve composite processing, and thoroughly eradicates the process stubborn problems of absolute positioning reference migration and inner and outer ring space geometric precision loss caused by multi-procedure discrete circulation. In order to achieve the above purpose, the invention is realized by the following technical scheme that the automatic processing equipment applied to butterfly valve manufacturing comprises: The static clamping system is used for bearing, clamping and fixing the butterfly valve body to be processed; The