A machine tool chuck for multi-way valve processing

Abstract

The present invention relates to a machine tool chuck for multi-way valve processing, comprising: a chuck support, a chuck body and a positioning and rotating mechanism; the chuck body comprises three V-shaped positioning blocks and corresponding V-shaped pressure blocks for adjusting the correct posture of the multi-way valve and corresponding movable clamping mechanisms; the chuck body is movably fixed on the chuck support through the positioning and rotating mechanism, and the chuck body sequentially completes the positioning and clamping of three stations relative to the chuck support through the positioning and rotating mechanism, ensuring that the multi-way valve processing surface of each processing station is coaxial with the rotation center of the machine tool spindle; the chuck support is fixedly connected to the machine tool rotating spindle. The chuck has a simple structure, convenient operation, good reliability, and can realize the sequential processing of the three stations of the valve under the rotation of the valve workpiece. Compared with the processing of the machining center equipment, it greatly improves the processing efficiency, is economical and practical, and has a wide range of application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical workpiece processing and clamping equipment, and in particular to a machine tool chuck used for multi-way valve processing. Background Art

[0002] There are two main methods for processing multi-way valves:

[0003] The first method is to use ordinary machine tools to complete the processing by rotating the valve workpiece and cutting with the tool. This workpiece rotation cutting method has high processing efficiency, but for valve parts, when processing multi-way valves, the valve has several workstations, and the workpiece needs to be repositioned and clamped several times, which leads to low efficiency of auxiliary work.

[0004] The second method is to use a machining center. The valve parts can be clamped at one time, the workpiece does not move, and the tool completes multi-station cutting processing through a program. However, the cutting efficiency of this processing method is less than 50% of the workpiece rotation processing method. Compared with ordinary machine tools, it not only has low processing efficiency but also higher costs. Summary of the invention

[0005] The present invention aims at the technical problems existing in the prior art and provides a machine tool chuck for multi-way valve processing, thereby solving the problem of low efficiency in processing the multi-way valve in the prior art.

[0006] The technical solution of the present invention to solve the above technical problem is as follows: A machine tool chuck for multi-way valve processing comprises: a chuck support, a chuck body and a positioning and rotating mechanism;

[0007] Chuck support, chuck body and positioning rotation mechanism;

[0008] The chuck body includes various movable clamping mechanisms corresponding to various stations of the multi-way valve, and each of the movable clamping mechanisms clamps or releases each station of the multi-way valve respectively;

[0009] The chuck body is movably fixed on the chuck support by the positioning and rotating mechanism, and the chuck body is positioned and rotated relative to the chuck support in sequence by the positioning and rotating mechanism. When the chuck body is rotated to each positioning point, each processing surface of the multi-way valve is concentric with the rotary spindle of the machine tool.

[0010] The beneficial effects of the present invention are as follows: a machine tool chuck for multi-way valve processing provided by the present invention, when processing the multi-way valve, a positioning and rotating mechanism is arranged between the chuck support and the chuck body, so that the chuck body is positioned and rotated relative to the chuck support, and when rotating to each positioning point in turn, each processing surface is guaranteed to rotate concentrically with the machine tool rotary spindle. The chuck has a simple structure, is easy to operate, and has good reliability. It can realize the sequential processing of multiple valve stations while the valve workpiece is rotating. Compared with processing on a machining center, it greatly improves the processing efficiency, is economical and practical, and has broad application prospects.

[0011] Based on the above technical solution, the present invention can also be improved as follows.

[0012] Further, the positioning and rotating mechanism includes a round tube flange and a ball screw;

[0013] The circular tube flange comprises a circular tube and a flange positioning plate which are fixedly connected, and the flange positioning plate is provided with a flange positioning hole;

[0014] The chuck support comprises a support plate, the support plate is provided with a circular hole matching the size of the circular tube, and at least two positioning holes matching the size and position of the flange positioning hole are arranged around the circular hole;

[0015] The flange positioning plate is fixedly connected to the chuck body, and the round tube is located in the round hole of the chuck support; after the ball screw passes through the flange positioning hole, its steel ball presses against the support plate of the chuck support, and when the chuck body rotates to each positioning point, the steel ball of the ball screw is located in one of the positioning holes in the chuck support.

[0016] Furthermore, the cross section of the chuck support is L-shaped, including a rectangular support plate and a side plate vertically connected to each other; the side plate stop is fixedly installed with the machine tool spindle;

[0017] The positioning holes arranged on the chuck support include positioning hole I, positioning hole II and positioning hole III.

[0018] Further, the movable clamping mechanism includes a V-shaped groove with adjustable height, a V-shaped pressing block and a V-shaped pressing block movement control device;

[0019] The adjustable height V-shaped groove is arranged on the bottom surface of the chuck body, and the upper end is an adjustable height V-shaped groove opening facing upward. The adjustable height V-shaped groove support height is adjustable to ensure the correct processing posture of the multi-way valve; the opening of the V-shaped pressure block faces downward and moves under the control of the V-shaped pressure block movement control device; the multi-way valve is clamped between the adjustable height V-shaped groove and the adjustable height V-shaped groove of the V-shaped pressure block.

[0020] Further, the V-shaped pressing block movement control device includes a lever, a lever fulcrum support device and a hydraulic cylinder;

[0021] The lever fulcrum support device is arranged on the bottom surface of the chuck body and is used to fix the fulcrum of the lever;

[0022] One end of the lever is connected to the upper end of the V-shaped pressing block, and the other end is connected to the front end of the telescopic rod of the hydraulic cylinder.

[0023] Further, the chuck body includes a base;

[0024] The base includes a rectangular bottom plate, a support plate and a bracket plate, wherein the support plate is vertically connected to a short side of the bottom plate, and the bracket plate is connected to the upper end of the support plate and is parallel to the bottom plate.

[0025] Furthermore, the number of the movable clamping mechanisms is three, the V-shaped pressing blocks include: V-shaped pressing blocks I, V-shaped pressing blocks II and V-shaped pressing blocks III; the adjustable height V-shaped grooves include: adjustable height V-shaped grooves I, adjustable height V-shaped grooves III and adjustable height V-shaped grooves II, and the positioning height and posture of the multi-way valve are adjusted by adjusting the respective openings of the adjustable height V-shaped grooves I, adjustable height V-shaped grooves III and adjustable height V-shaped grooves II;

[0026] The adjustable height V-groove I, adjustable height V-groove III and adjustable height V-groove II of the adjustable height are arranged on the rectangular bottom plate, the adjustable height V-groove III is arranged at the front end of the rectangular bottom plate, and the center position is symmetrical relative to the center line of the machine tool spindle, and the adjustable height V-groove I and adjustable height V-groove II are arranged on both sides of the rectangular bottom plate, symmetrical to the center line of the machine tool rotary spindle;

[0027] The V-shaped pressing block I, V-shaped pressing block II and V-shaped pressing block III are respectively arranged up and down corresponding to the adjustable height V-shaped groove I, adjustable height V-shaped groove III and adjustable height V-shaped groove II.

[0028] Further, the hydraulic cylinder includes: hydraulic cylinder I, hydraulic cylinder II and hydraulic cylinder III; the lever includes: lever I, lever II and lever III;

[0029] The motion planes of the levers I, II and III are parallel to the center line of the rotary spindle of the machine tool, parallel to each other and perpendicular to the support plate;

[0030] The hydraulic cylinders I, II and III are parallel to each other and are arranged close to the support plate, and the upper ends are fixed on the support plate.

[0031] Further, the machine tool chuck also includes a clamping device, and the clamping device includes a hydraulic cylinder IV and a pressure plate;

[0032] The hydraulic cylinder IV is arranged on the chuck body, and the telescopic rod of the hydraulic cylinder IV is arranged on the axis of the circular hole on the bottom plate of the chuck support;

[0033] The pressure plate is connected to the telescopic rod of the hydraulic cylinder IV. When the telescopic rod of the hydraulic cylinder IV is extended or retracted, the pressure plate is driven to press or loosen the chuck body on the chuck support.

[0034] The beneficial effect of adopting the above-mentioned further scheme is as follows: the machine tool chuck for rotatable positioning in three-station processing of valves provided by the present invention first fixes and clamps the side plate of the chuck support and the machine tool spindle, then places the three-way flange workpiece on the chuck with adjustable height V-groove station, adjusts the adjustable height V-groove of the bottom plate of the chuck base, adjusts the posture to make it correct, and the three groups of hydraulic cylinder telescopic rods are respectively contracted to drive the three groups of levers to drive the three groups of V-shaped pressure blocks to clamp the valve workpiece, the piston rod of the hydraulic cylinder clamping device is contracted, and the chuck and the chuck support are clamped through the pressure plate to fix them, and when one side of the valve is processed, the hydraulic cylinder clamping device is loosened, and the chuck base is rotated to position the glass bead tightening screw to a 90° position, and the piston rod of the hydraulic cylinder clamping device is contracted to clamp the chuck and the chuck support, and then the second side of the valve is processed. The same principle is used to process the third side after the second side is processed. When processing three-way valves, the chuck does not need to be disassembled and clamped multiple times. It only needs to rotate the chuck base, cooperate with the steel ball positioning device and the hydraulic cylinder clamping device, and the cutting process of the three-way valve can be conveniently completed. It is easy to operate, efficient, economical and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A structural schematic diagram of a machine tool chuck for multi-way valve processing provided by an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of a circular tube flange structure provided by an embodiment of the present invention;

[0037] Figure 3 A schematic diagram of a chuck support structure provided by an embodiment of the present invention;

[0038] Figure 4 A schematic diagram of a three-way valve clamped by a machine tool chuck for three-way valve processing provided by an embodiment of the present invention;

[0039] Figure 5 A schematic diagram of a chuck main structure of a machine tool chuck for machining a three-way valve is provided in accordance with an embodiment of the present invention.

[0040] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0041] 0. Three-way valve workpiece; 1. Chuck support; 1-1. Positioning hole Ⅰ; 1-2. Positioning hole Ⅱ; 1-3. Positioning hole Ⅲ; 2. Chuck body; 2-1. Base; 221. Hydraulic cylinder Ⅰ; 222. Lever Ⅰ; 223. V-shaped pressure block Ⅰ; 231. Hydraulic cylinder Ⅱ; 232. Lever Ⅱ; 233. V-shaped pressure block Ⅱ; 241. Hydraulic cylinder Ⅲ; 242. Lever Ⅲ; 243. V-shaped pressure block Ⅲ; 2-5. Adjustable height V-shaped groove Ⅰ; 2-6. Adjustable height V-shaped groove Ⅲ; 2-7. Adjustable height V-shaped groove Ⅱ; 3. Round pipe flange; 31. Round pipe; 32. Flange positioning plate; 321. Flange positioning hole; 4. Ball screw; 5. Clamping device; 5-1. Hydraulic cylinder Ⅳ; 5-2. Pressure plate. DETAILED DESCRIPTION

[0042] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0043] In the conventional machine tools currently used for processing multi-way valves, the tool is usually stationary while the workpiece is rotating. When processing multiple workstations of the valve, the workpiece needs to be repositioned and clamped multiple times, which is inconvenient to operate and inefficient. Although CNC lathes can meet the requirement of the tool moving while the workpiece is stationary to complete the cutting process through the program, compared with conventional machine tools, not only the processing efficiency is low, but also the cost is higher. Therefore, valve manufacturers prefer to use economical and affordable conventional machine tools to complete the processing. In order to solve the above problems, an embodiment of the present invention provides a machine tool chuck that can be rotated and positioned for multi-station processing of valves.

[0044] like Figure 1 FIG. 1 is a schematic diagram of a structure of a machine tool chuck for multi-way valve processing provided by an embodiment of the present invention, comprising Figure 1 It can be known that the embodiment of the chuck includes: a chuck support 1, a chuck body 2 and a positioning and rotating mechanism.

[0045] The chuck body 2 includes various movable clamping mechanisms corresponding to various working positions of the multi-way valve, and each movable clamping mechanism clamps or releases each working position of the multi-way valve respectively.

[0046] The chuck body 2 is movably fixed on the chuck support through a positioning and rotating mechanism. The chuck body is positioned and rotated relative to the chuck support in sequence through the positioning and rotating mechanism. When rotating to each positioning point, each processing surface of the multi-way valve is concentric with the rotary spindle of the machine tool.

[0047] The present invention provides a machine tool chuck for multi-way valve processing. When processing the multi-way valve, a positioning and rotating mechanism is set between the chuck support 1 and the chuck body 2, so that the chuck body 2 is positioned and rotated relative to the chuck support, and each processing surface is faced to the processing device when it is rotated to each positioning point in turn. The chuck has a simple structure, is easy to operate, and has good reliability. It can realize the sequential processing of multiple valve stations while the valve workpiece is rotating. Compared with processing on a machining center, the processing efficiency is greatly improved, the economy is affordable, and it has broad application prospects.

[0048] Example 1

[0049] Embodiment 1 provided by the present invention is a machine tool chuck for multi-way valve processing provided by the present invention, comprising Figure 1 It can be seen that the chuck includes: a chuck support 1, a chuck body 2 and a positioning and rotating mechanism. Specifically, the cross section of the chuck support 1 is L-shaped, including a rectangular plate-shaped support plate and a side plate that are vertically connected to each other, and the side plate stop is fixedly installed with the machine tool spindle; the chuck body 2 includes a base 2-1; the base 2-1 includes a rectangular plate-shaped bottom plate, a support plate and a bracket plate, the support plate is vertically connected to a short side of the bottom plate, and the bracket plate is connected to the upper end of the support plate and is parallel to the bottom plate.

[0050] The chuck body 2 includes various movable clamping mechanisms corresponding to various working positions of the multi-way valve, and each movable clamping mechanism clamps or releases each working position of the multi-way valve respectively.

[0051] Specifically, the movable clamping mechanism includes a V-shaped groove, a V-shaped pressing block and a V-shaped pressing block movement control device, and the V-shaped groove and the V-shaped pressing block are in the shape of plates parallel to the corresponding workstation surfaces.

[0052] An adjustable height V-shaped groove is arranged on the bottom surface of the chuck body 2 and is perpendicular to the bottom surface, and the upper end is an adjustable height V-shaped groove opening upward; the opening of the V-shaped pressure block faces downward, and the upper end is connected to the V-shaped pressure block movement control device, and moves under the control of the V-shaped pressure block movement control device; the work station surface end corresponding to the multi-way valve is clamped between the adjustable height V-shaped groove and the two adjustable height V-shaped grooves of the V-shaped pressure block.

[0053] The height connection device adjusts the height of the height-adjustable V-shaped groove to clamp or release the corresponding workstation surface end.

[0054] Preferably, the V-shaped pressure block movement control device includes a lever, a lever fulcrum support device and a hydraulic cylinder.

[0055] The lever fulcrum support device is arranged on the bottom surface of the chuck body 2 and is used to fix the fulcrum of the lever.

[0056] One end of the lever is connected to the upper end of the V-shaped pressing block, and the other end is connected to the front end of the telescopic rod of the hydraulic cylinder. The telescopic direction of the telescopic rod of the hydraulic cylinder is perpendicular to the bottom surface of the chuck body 2.

[0057] The chuck body 2 is movably fixed on the chuck support through a positioning and rotating mechanism. The chuck body is positioned and rotated relative to the chuck support in sequence through the positioning and rotating mechanism. When rotating to each positioning point, each processing surface of the multi-way valve is concentric with the rotary spindle of the machine tool.

[0058] Specifically, the positioning and rotating mechanism includes a round tube flange 3 and a ball screw 4. The ball screw is a derivative product of a set screw and is composed of a spring, a steel ball and a shell. The chuck base 2-1 can rotate 180 degrees on the mounting hole of the chuck support 1 through the round tube part of the round tube flange 3.

[0059] like Figure 2 The figure shows a schematic diagram of the structure of a circular pipe flange provided by an embodiment of the present invention, comprising Figure 2 It can be seen that the circular tube flange 3 comprises a circular tube 31 and a flange positioning plate 32 which are fixedly connected, and a flange positioning hole 321 is provided on the flange positioning plate.

[0060] The chuck support 1 includes a bottom plate I, on which a round hole matching the size of the round tube 31 is arranged, and around the round hole are at least two positioning holes matching the size and position of the flange positioning hole 321 .

[0061] The flange positioning plate 32 is fixedly connected to the chuck body 2, and the round tube 31 is located in the round hole; after the ball screw 4 passes through the flange positioning hole 321, the steel ball presses against the support plate of the chuck support 1, and when the chuck body 2 rotates to each positioning point, the steel ball of the ball screw 4 is located in any positioning hole of the chuck support 1, and when the chuck body 2 is rotated, the steel ball of the ball screw 4 switches in each positioning hole.

[0062] Example 2

[0063] Embodiment 2 provided by the present invention is an embodiment of a machine tool chuck for three-way valve processing provided by the present invention, such as Figure 4 The schematic diagram of a machine tool chuck clamping a three-way valve for three-way valve processing provided by an embodiment of the present invention, A, B and C of the three-way valve are the three surfaces that need to be processed. Figure 5 Shown is a schematic diagram of a chuck main structure of a machine tool chuck for three-way valve processing provided in an embodiment of the present invention.

[0064] Depend on Figure 1-Figure 5It can be known that the embodiment of a machine tool chuck for three-way valve processing provided by the present invention includes: a chuck support 1, a chuck body 2 and a positioning and rotating mechanism. Specifically, the cross section of the chuck support 1 is L-shaped, including a rectangular plate-shaped support plate and a side plate vertically connected to each other, and the side plate stop is fixedly installed with the machine tool spindle; the chuck body 2 includes a base 2-1; the base 2-1 includes a rectangular plate-shaped bottom plate, a support plate and a bracket plate, the support plate is vertically connected to a short side of the bottom plate, and the bracket plate is connected to the upper end of the support plate and is parallel to the bottom plate.

[0065] The chuck body 2 includes various active clamping mechanisms corresponding to various working surfaces of the three-way valve, which respectively clamp or release the ends of the working surfaces of the three-way valve. Specifically, there are three active clamping mechanisms.

[0066] The movable clamping mechanism comprises a V-shaped groove, a V-shaped pressing block and a V-shaped pressing block movement control device. The V-shaped groove and the V-shaped pressing block are in the shape of plates parallel to the corresponding workstation surfaces.

[0067] An adjustable height V-shaped groove is arranged on the bottom surface of the chuck body 2 and is perpendicular to the bottom surface, and the upper end is an adjustable height V-shaped groove opening upward; the lower end of the V-shaped pressure block is an adjustable height V-shaped groove opening downward, and the upper end is connected to the V-shaped pressure block movement control device; the work station surface end corresponding to the three-way valve is clamped between the adjustable height V-shaped groove and the two adjustable height V-shaped grooves of the V-shaped pressure block.

[0068] Specifically, the V-shaped pressure block includes: V-shaped pressure block I223, V-shaped pressure block II233 and V-shaped pressure block III243; the adjustable height V-shaped groove includes: adjustable height V-shaped groove I2-5, adjustable height V-shaped groove III2-6 and adjustable height V-shaped groove II2-7. By adjusting the respective openings of the adjustable height V-shaped groove I2-5, adjustable height V-shaped groove III2-6 and adjustable height V-shaped groove II2-7, the positioning height and posture of the multi-way valve are adjusted.

[0069] The adjustable height V-groove Ⅰ2-5, adjustable height V-groove Ⅲ2-6 and adjustable height V-groove Ⅱ2-7 are arranged on the rectangular base plate, the adjustable height V-groove Ⅲ2-6 is arranged at the front end of the rectangular base plate, and the center position is symmetrical relative to the center line of the machine tool spindle. The adjustable height V-groove Ⅰ2-5 and adjustable height V-groove Ⅱ2-7 are arranged on both sides of the rectangular base plate, symmetrical to the center line of the machine tool rotary spindle.

[0070] The V-shaped pressing block I 223, the V-shaped pressing block II 233 and the V-shaped pressing block III 243 are respectively arranged up and down corresponding to the adjustable height V-shaped groove I 2-5, the adjustable height V-shaped groove III 2-6 and the adjustable height V-shaped groove II 2-7.

[0071] The height-adjustable V-shaped groove III 2-6 is arranged on the short side opposite to the support plate on the rectangular bottom plate, and the height-adjustable V-shaped groove I 2-5 and the height-adjustable V-shaped groove II 2-7 are arranged on the two long sides of the square bottom plate near one end of the height-adjustable V-shaped groove III 2-6. In the embodiment shown in the figure, the three height-adjustable V-shaped grooves are respectively located on the front, left and right sides.

[0072] The V-shaped pressing block I 223, the V-shaped pressing block II 233 and the V-shaped pressing block III 243 are respectively arranged on the same plane corresponding to the adjustable height V-shaped groove I 2-5 and the adjustable height V-shaped groove II 2-7.

[0073] The height connection device adjusts the height of the adjustable height V-shaped groove to clamp or loosen the corresponding workstation surface end, which is used to adjust the posture of the multi-valve workpiece so that the center plane of the valve three holes is coplanar with the center horizontal plane of the machine tool spindle.

[0074] The V-shaped pressing block movement control device comprises a lever, a lever fulcrum supporting device and a hydraulic cylinder.

[0075] The lever fulcrum support device is arranged on the bottom surface of the chuck body 2, and is used to fix the fulcrum of the lever. Specifically, the fulcrums of the three levers are respectively connected to the three supporting points on the upper surface of the bottom plate of the base 2-1, namely, the lever fulcrum support device, through axle pins.

[0076] The front end connection points of the three groups of levers are respectively connected to three V-shaped pressure blocks, which can clamp the valve workpiece. The end connection points of the three groups of levers are respectively connected to the front end connection points of the three groups of hydraulic cylinder piston rods through rotating pins. The telescopic direction of the telescopic rod of the hydraulic cylinder is perpendicular to the bottom surface of the chuck body 2.

[0077] Specifically, the hydraulic cylinder includes: hydraulic cylinder I 221 , hydraulic cylinder II 231 and hydraulic cylinder III 241 . The lever includes: lever I 222 , lever II 232 and lever III 242 .

[0078] The planes where lever I 222, lever II 232 and lever III 242 move are parallel to each other and perpendicular to the support plate.

[0079] Hydraulic cylinder I 221, hydraulic cylinder II 231 and hydraulic cylinder III 241 are arranged parallel to each other and close to the support plate, and the upper ends are fixed on the bracket plate. Specifically, the tail end covers of the three hydraulic cylinders are respectively hinged to the three connection points on the bracket plate at the top of the base 2-1.

[0080] The chuck body 2 is movably fixed on the chuck support through a positioning and rotating mechanism. The chuck body is positioned and rotated relative to the chuck support in sequence through the positioning and rotating mechanism. When rotating to each positioning point, each processing surface of the three-way valve faces the processing device.

[0081] Specifically, the positioning and rotating mechanism includes a round tube flange 3 and a ball screw 4 .

[0082] The round tube flange 3 comprises a round tube 31 and a flange positioning plate 32 which are fixedly connected. The flange positioning plate is provided with a flange positioning hole 321. Figure 2 It can be seen that the flange positioning plate 32 is circular and fixedly connected to the upper surface of the bottom plate of the base 2-1. The round stop passes through the chuck support 1, so that the chuck can rotate the round tube flange 3 to make the chuck body 2 rotate 1±90° relative to the chuck support, and the rotation center line intersects with the intersection point of the three-hole center line of the valve workpiece on the base.

[0083] The chuck support 1 includes a bottom plate I, on which a round hole matching the size of the round tube 31 is arranged, and around the round hole are at least two positioning holes matching the size and position of the flange positioning hole 321 .

[0084] The flange positioning plate 32 is fixedly connected to the chuck body 2, and the round tube 31 is located in the round hole; after the ball screw 4 passes through the flange positioning hole 321, the steel ball presses against the support plate of the chuck support 1, and when the chuck body 2 rotates to each positioning point, the steel ball of the ball screw 4 is located in any positioning hole of the chuck support 1, and the internal spring of the ball screw 4 is expanded and contracted, so that the steel ball can be switched in each positioning hole.

[0085] Specifically, the positioning holes provided on the chuck support 1 include positioning hole I1-1, positioning hole II1-2 and positioning hole III1-3.

[0086] The lines connecting the positioning hole Ⅰ1-1, the positioning hole Ⅱ1-2 and the positioning hole Ⅲ1-3 and the center of the circular hole are parallel to one side of the rectangular bottom plate and perpendicular to the other side of the rectangular bottom plate.

[0087] Among the three working surfaces of the three-way valve, two working surfaces are in directions that are relative and parallel to each other, and the other working surface is located in the middle of the two working surfaces and is perpendicular to the directions of the two working surfaces.

[0088] Correspondingly, the three positioning holes that determine the positioning point are positioning hole I1-1, positioning hole II1-2 and positioning hole III1-3. In the embodiment provided by the present invention, positioning hole I1-1 is located between positioning hole II1-2 and positioning hole III1-3. If positioning hole I1-1 is a 0-degree starting point, 90 degrees of clockwise rotation along positioning hole I1-1 is positioning hole II1-2, and 90 degrees of counterclockwise rotation is positioning hole III1-3. Even if the chuck body 2 can rotate on the chuck support 1 by ±90°.

[0089] Preferably, the machine tool chuck also includes a workpiece clamping device 5 to ensure the correct clamping of the valve workpiece, and the clamping device 5 includes a hydraulic cylinder IV5-1 and a pressure plate 5-2.

[0090] The hydraulic cylinder IV5-1 is arranged on the tail end cover and is fixedly connected to both the adjustable height V-shaped groove I2-5 and the adjustable height V-shaped groove II2-7. The telescopic rod of the hydraulic cylinder IV5-1 is arranged on the axis of the circular hole on the bottom plate of the chuck support 1.

[0091] The pressure plate 5 - 2 is connected to the telescopic rod of the hydraulic cylinder IV 5 - 1 through a pin. When the telescopic rod of the hydraulic cylinder IV 5 - 1 is extended or retracted, the pressure plate 5 - 2 is driven to press or loosen the chuck body 2 on the chuck support 1 .

[0092] During the specific implementation process, firstly, the side plate of the chuck support 1 is fixedly clamped to the machine tool spindle, and then the three-way valve workpiece 0 is placed on the adjustable height V-groove I2-5 and the adjustable height V-groove II2-7 positions of the chuck body 2, and the height of the adjustable height V-groove III2-6 on the front side of the bottom plate of the base 2-1 is adjusted to adjust the posture of the valve workpiece to keep it horizontal, and the telescopic rods of the hydraulic cylinder I221, the hydraulic cylinder II231 and the hydraulic cylinder III241 are retracted respectively, and respectively drive the lever I222, the lever II232, the lever III242 to drive the V-shaped pressure block I223, the V-shaped pressure block II233 and the V-shaped pressure block III243 to press the three-way valve workpiece 0, and the telescopic rod of the hydraulic cylinder IV5-1 of the clamping device 5 is retracted to press the chuck body 2 and the chuck support 1 through the pressure plate 5-2 to fix them, and the tool starts processing. When the A surface of the valve workpiece 0 is processed, the telescopic rod of the hydraulic cylinder IV5-1 of the clamping device 5 is released and rotated clockwise The steel ball of the ball screw 4 falls to the -90° positioning hole Ⅱ1-2, and the telescopic rod of the hydraulic cylinder Ⅳ5-1 of the clamping device 5 contracts to clamp the chuck body 2 and the chuck support 1, and the C surface of the three-way valve workpiece 0 is processed. After the C surface is processed, the telescopic rod of the hydraulic cylinder Ⅳ5-1 of the clamping device 5 is loosened, and the chuck base 2-1 is rotated counterclockwise to make the steel ball of the ball screw 4 fall to the 90° positioning hole Ⅲ1-3, and the hydraulic cylinder Ⅳ5-1 of the clamping device 5 is pressed. The telescopic rod contracts to press the chuck body 2 and the chuck support 1, and the B surface of the three-way valve workpiece 0 is processed. After the B surface is processed, the telescopic rods of the hydraulic cylinder Ⅰ221, the hydraulic cylinder Ⅱ231 and the hydraulic cylinder Ⅲ241 are extended respectively, and the levers Ⅰ222, Ⅱ232 and Ⅲ242 are driven to drive the V-shaped pressing block Ⅰ223, Ⅱ233 and Ⅲ243 to release the three-way valve workpiece 0, and the cutting process of the three-way valve workpiece is completed. When processing the three-way valve, the chuck does not need to be disassembled and clamped for many times. It only needs to rotate the chuck base, cooperate with the positioning rotation mechanism and the clamping device, and the cutting process of the three-way valve can be conveniently completed. It is easy to operate, efficient, economical and has broad application prospects.

[0093] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, i.e., they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0094] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A machine tool chuck for multi-way valve processing, characterized in that: The chuck comprises: a chuck support (1), a chuck body (2) and a positioning and rotating mechanism; The chuck body (2) comprises a plurality of movable clamping mechanisms corresponding to the respective working positions of the multi-way valve, and each of the movable clamping mechanisms clamps or releases the respective working positions of the multi-way valve; The chuck body (2) is movably fixed on the chuck support by the positioning and rotating mechanism, and is positioned relative to the chuck support in sequence by the positioning and rotating mechanism, and the chuck body is rotated, so that when the chuck body is rotated to each positioning point, each processing surface of the multi-way valve is concentric with the rotary spindle of the machine tool; The positioning and rotating mechanism comprises a round tube flange (3) and a ball screw (4); The circular tube flange (3) comprises a circular tube (31) and a flange positioning plate (32) which are fixedly connected, and the flange positioning plate is provided with a flange positioning hole (321); The chuck support (1) comprises a support plate, the support plate is provided with a circular hole whose size matches that of the circular tube (31), and at least two positioning holes whose size and position match those of the flange positioning hole (321) are provided around the circular hole; The flange positioning plate (32) is fixedly connected to the chuck body (2), and the round tube (31) is located in the round hole of the chuck support (1); after the ball screw (4) passes through the flange positioning hole (321), its steel ball abuts against the support plate of the chuck support (1), and when the chuck body (2) rotates to each positioning point, the steel ball of the ball screw (4) is located in one of the positioning holes in the chuck support (1); The movable clamping mechanism comprises a V-shaped groove with adjustable height, a V-shaped pressing block and a V-shaped pressing block movement control device; The adjustable height V-shaped groove is arranged on the bottom surface of the chuck body (2), and the upper end is an adjustable height V-shaped groove opening facing upward. The adjustable height V-shaped groove support is adjustable in height, thereby ensuring the correct processing posture of the multi-way valve; the opening of the V-shaped pressure block faces downward, and moves under the control of the V-shaped pressure block movement control device; the multi-way valve is clamped between the adjustable height V-shaped groove and the V-shaped groove opening of the V-shaped pressure block.

2. The machine tool chuck according to claim 1, characterized in that: The chuck support (1) has an L-shaped cross section and comprises a rectangular support plate and a side plate which are vertically connected to each other; the side plate stopper is fixedly mounted on the machine tool spindle; The positioning holes arranged on the chuck support (1) include a positioning hole I (1-1), a positioning hole II (1-2) and a positioning hole III (1-3).

3. The machine tool chuck according to claim 1, characterized in that: The V-shaped pressing block movement control device comprises a lever, a lever fulcrum support device and a hydraulic cylinder; The lever fulcrum support device is arranged on the bottom surface of the chuck body (2) and is used to fix the fulcrum of the lever; One end of the lever is connected to the upper end of the V-shaped pressing block, and the other end is connected to the front end of the telescopic rod of the hydraulic cylinder.

4. The machine tool chuck according to claim 3, characterized in that: The chuck body (2) comprises a base (2-1).

5. The machine tool chuck according to claim 4, characterized in that: The number of the movable clamping mechanisms is three, the V-shaped pressing blocks include: V-shaped pressing block I (223), V-shaped pressing block II (233) and V-shaped pressing block III (243); the adjustable height V-shaped grooves include: adjustable height V-shaped grooves I (2-5), adjustable height V-shaped grooves III (2-6) and adjustable height V-shaped grooves II (2-7); by adjusting the respective openings of the adjustable height V-shaped grooves I (2-5), adjustable height V-shaped grooves III (2-6) and adjustable height V-shaped grooves II (2-7), the positioning height and posture of the multi-way valve are adjusted; The adjustable height V-shaped groove I (2-5), the adjustable height V-shaped groove III (2-6), and the adjustable height V-shaped groove II (2-7) are arranged on the rectangular bottom plate, the adjustable height V-shaped groove III (2-6) is arranged at the front end of the rectangular bottom plate, and the center position is symmetrical relative to the center line of the machine tool spindle, and the adjustable height V-shaped groove I (2-5) and the adjustable height V-shaped groove II (2-7) are arranged on both sides of the rectangular bottom plate, symmetrical to the center line of the machine tool rotary spindle; The V-shaped pressing block I (223), the V-shaped pressing block II (233) and the V-shaped pressing block III (243) are respectively arranged up and down corresponding to the adjustable height V-shaped groove I (2-5), the adjustable height V-shaped groove III (2-6) and the adjustable height V-shaped groove II (2-7).

6. The machine tool chuck according to claim 5, characterized in that: The hydraulic cylinder includes: hydraulic cylinder I (221), hydraulic cylinder II (231) and hydraulic cylinder III (241); the lever includes: lever I (222), lever II (232) and lever III (242); The upper ends of the hydraulic cylinder I (221), the hydraulic cylinder II (231) and the hydraulic cylinder III (241) are fixed on the support plate.

7. The machine tool chuck according to claim 5, characterized in that: The machine tool chuck also includes a clamping device (5), and the clamping device (5) includes a hydraulic cylinder IV (5-1) and a pressure plate (5-2); The hydraulic cylinder IV (5-1) is arranged on the chuck body (2), and the telescopic rod of the hydraulic cylinder IV (5-1) is arranged on the axis of the circular hole on the bottom plate of the chuck support (1); The pressure plate (5-2) is connected to the telescopic rod of the hydraulic cylinder IV (5-1), and when the telescopic rod of the hydraulic cylinder IV (5-1) is extended or retracted, it drives the pressure plate (5-2) to press or loosen the chuck body (2) on the chuck support (1).

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