A hydraulic clamping device for CNC machine tools

Abstract

The present invention relates to the technical field of machine tool accessories, and discloses a hydraulic clamping device for a numerically controlled machine tool, comprising a mounting frame, and further comprising: a rotating disk 1 rotatably connected to the mounting frame, a rotating disk 2 being provided at one end of the rotating disk 1, four guide grooves 1 being evenly provided on the rotating disk 1, the four guide grooves 1 being radially provided, guide blocks 1 being slidably connected in the four guide grooves 1 along the length direction, a clamping shaft 1 being fixed at one end of the four guide blocks 1 away from the rotating disk 2; four guide grooves 2 being evenly provided on the rotating disk 2, the four guide grooves 2 being radially provided. When clamping a thin-walled pipe fitting, the four clamping shafts 1 and the four clamping shafts 2 form four clamping claws, the four clamping shafts 2 support the side walls of the thin-walled pipe fitting, the four clamping shafts 1 cooperate with the four clamping shafts 2 to clamp the side walls of the thin-walled pipe fitting, thereby avoiding the problem of the side walls of the thin-walled pipe fitting being deformed by force when clamping the thin-walled pipe fitting, and improving the clamping stability of the thin-walled pipe fitting.

Description

Technical Field

[0001] The invention belongs to the technical field of machine tool accessories, and in particular relates to a hydraulic clamping device for a numerically controlled machine tool. Background Art

[0002] When a CNC machine tool processes a workpiece, the workpiece is generally fixed on a fixture, such as a three-jaw chuck fixture on a machine tool. The workpiece is clamped by the three jaws moving synchronously toward or against each other.

[0003] The existing three-jaw chuck clamps the side wall of the workpiece during operation. When CNC machine tools are required to process special-shaped workpieces such as thin-walled round tubes, thin-walled square tubes, thin-walled flanges and rectangular parts, the following problems exist:

[0004] 1. The side wall of thin-walled round tubes is thin. When clamping the side wall, it is easy to cause the clamping parts of thin-walled pipe fittings such as thin-walled round tubes and thin-walled square tubes to deform, which is easy to damage the thin-walled pipe fittings. In addition, the clamping force between the deformed thin-walled pipe fittings and the clamping jaws is weak, and they are easy to fall off from the clamping device during processing, posing a safety hazard.

[0005] 2. Thin-walled flanges have a small thickness (small height) and a small clamping area on the side walls. When a three-jaw chuck clamps the side walls of thin-walled flanges, the clamping pressure is high, which can easily cause deformation of the clamping position of the thin-walled flanges, damaging the workpiece. The deformation can also cause the center position of the thin-walled flanges to shift, affecting the machining accuracy of the thin-walled flanges.

[0006] 3. Existing three-jaw chucks cannot clamp rectangular parts. Summary of the Invention

[0007] The purpose of the embodiment of the present invention is to provide a hydraulic clamping device for CNC machine tools, which aims to solve the problems that three-jaw chucks cannot clamp rectangular parts, and that workpieces such as thin-walled pipes and thin-walled flanges are damaged and cannot be clamped tightly.

[0008] The present invention is achieved in this way: a hydraulic clamping device for a CNC machine tool comprises a mounting frame, and also comprises a rotating disk 1 rotatably connected to the mounting frame, wherein one end of the rotating disk 1 is provided with a rotating disk 2, and the rotating disk 1 is evenly provided with four guide grooves 1, the four guide grooves 1 are radially arranged, and the four guide grooves 1 are slidably connected to the guide blocks 1 in the length direction, and the four guide blocks 1 are fixed to the ends of the rotating disk 2 away from the rotating disk 2; the rotating disk 2 is evenly provided with four guide grooves 2, the four guide grooves 2 are radially arranged, the four guide grooves 2 are slidably connected to the guide blocks 2 in the length direction, and the four guide blocks 2 are fixed to the ends of the rotating disk 1; the mounting frame is provided with a driving mechanism, the driving mechanism is used to drive the four guide blocks 1 to move synchronously in opposite directions, the driving mechanism is used to drive the four guide blocks 2 to move synchronously in opposite directions, the ends of the clamping shaft 1 and the clamping shaft 2 are slidably connected to an extension sleeve, and the extension sleeve is fixed to the clamping shaft 1 or the clamping shaft 2 by bolts.

[0009] A further technical solution is that the rotating disk 1 is provided with four avoidance grooves 1 for avoiding the movement of four clamping shafts 1, and the rotating disk 2 is provided with four avoidance grooves 2 for avoiding the movement of four guide blocks 1. The rotating disk 2 is rotatably connected to one end of the rotating disk 1, and the rotating disk 2 is fixedly connected to the rotating disk 1 by fastening bolts.

[0010] A further technical solution is that the driving mechanism includes a guide rod fixed at the axis of one end of the rotating disk 2 away from the rotating disk 1, and a guide sleeve 1 and a guide sleeve 2 are slidably connected to the guide rod along the length direction, and four connecting rods 1 are evenly connected to one side wall of the guide sleeve, and the ends of the four connecting rods 1 are respectively rotatably connected to the four guide blocks 2, and four connecting rods 2 are evenly connected to the side wall of the guide sleeve 2, and the ends of the four connecting rods 2 are respectively rotatably connected to the four guide blocks 1, and a moving component 1 and a moving component 2 are provided on the mounting frame, and the moving component 1 is used to drive the guide sleeve 1 to move on the guide rod, and the moving component 2 is used to drive the guide sleeve 2 to move on the guide rod.

[0011] A further technical solution is that the moving component includes a hollow rotary hydraulic cylinder fixed on the upper end of the mounting frame, the telescopic end of the hollow rotary hydraulic cylinder is connected to a connecting frame, and the end of the connecting frame is fixed on a guide sleeve.

[0012] A further technical solution is that the moving component 2 includes a hollow rotary hydraulic cylinder 2 fixed at the upper end of the mounting frame, the telescopic end of the hollow rotary hydraulic cylinder 2 is connected to a connecting frame 2, the end of the connecting frame 2 is fixed on a guide sleeve 2, the connecting frame 1 is hollow, and the connecting frame 2 passes through the connecting frame 1.

[0013] A further technical solution is that the guide rod includes a fixed guide rod and a movable guide rod, one end of the fixed guide rod is fixed to the axis of the rotating disk 2 away from the rotating disk 1, and the movable guide rod is rotatably connected to the other end of the fixed guide rod, the movable guide rod and the fixed guide rod are fixedly connected by a fastening bolt, the guide sleeve 1 is slidably connected to the fixed guide rod, and the guide sleeve 2 is slidably connected to the movable guide rod.

[0014] According to a further technical solution, a motor is fixed on the mounting frame, a gear 1 is fixed to the rotating end of the motor, a gear 2 is fixed on a side wall of the rotating disk, and the gear 2 is meshed with the gear 1.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. When clamping thin-walled pipe fittings, the four clamping shafts 1 and 2 form four clamping jaws. The four clamping shafts 2 support the side walls of the thin-walled pipe fittings. The four clamping shafts 1 cooperate with the four clamping shafts 2 to clamp the side walls of the thin-walled pipe fittings, thereby avoiding the problem of deformation of the side walls of the thin-walled pipe fittings under stress when clamping the thin-walled pipe fittings and improving the clamping stability of the thin-walled pipe fittings.

[0017] 2. When clamping a rectangular workpiece, the four guide blocks 2 drive the clamping shafts 2 to move synchronously toward each other. The four clamping shafts 2 contact the opposite sides of the rectangular workpiece and clamp the rectangular workpiece.

[0018] 3. When clamping a thin-walled flange, the four clamping axes (1) contact the sidewall of the thin-walled flange with its longer diameter, while the four clamping axes (2) contact the sidewall of the thin-walled flange with its shorter diameter, thereby simultaneously clamping both sidewalls of the thin-walled flange. This increases the clamping area of ​​the thin-walled flange sidewall and improves the clamping stability of the thin-walled flange. The distance between the four clamping axes (1) and the four clamping axes (2) is adjustable, making it easier to clamp thin-walled flanges of different sizes.

[0019] 4. When processing the side walls and inner walls of thin-walled pipes or pipes with normal wall thickness, the four clamping axes 2 and 1 support the side walls or inner walls of the pipes, increasing the support position of the inner walls and inner walls of the pipes, thereby making the force on the pipes more uniform, thereby reducing the degree of deformation of the thin-walled pipes and protecting the pipes;

[0020] 5. When the processing angle of the workpiece needs to be adjusted, or the workpiece needs to be processed in a rotating state, the motor drives gear 1 to rotate, gear 1 drives rotating disk 1 to rotate through gear 2, rotating disk 1 drives rotating disk 2 to rotate, and rotating disk 1 and rotating disk 2 drive the workpiece to rotate, thereby facilitating the processing of the workpiece and avoiding the need to disassemble and reinstall the workpiece when the processing angle needs to be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a hydraulic clamping device for a CNC machine tool provided by the present invention;

[0022] Figure 2 The present invention provides Figure 1 Structural diagram of the right side tilt angle;

[0023] Figure 3 The present invention provides Figure 1 Schematic diagram of the structure after removing the mounting frame, hollow rotary hydraulic cylinder 1 and hollow rotary hydraulic cylinder 2;

[0024] Figure 4 The present invention provides Figure 1 Schematic diagram of the connection structure of the middle rotating disk;

[0025] Figure 5 The present invention provides Figure 2 Schematic diagram of the connection structure of the middle rotating disk 2;

[0026] Figure 6 A schematic diagram of the structure of a hydraulic clamping device for a CNC machine tool provided by the present invention for clamping the inner wall and side wall of a thin-walled pipe;

[0027] Figure 7 A schematic structural diagram of a hydraulic clamping device for a CNC machine tool provided by the present invention for clamping a rectangular part;

[0028] Figure 8 A schematic structural diagram of a hydraulic clamping device for a CNC machine tool provided by the present invention for clamping two side walls of a thin-walled flange;

[0029] Figure 9 A schematic structural diagram of a hydraulic clamping device for a CNC machine tool provided by the present invention for clamping the side wall of a thin-walled pipe fitting;

[0030] Figure 10 This is a structural schematic diagram of a hydraulic clamping device for a CNC machine tool provided by the present invention for clamping the inner wall of a thin-walled pipe fitting.

[0031] In the accompanying drawings: 101, mounting frame; 102, rotating disk 1; 103, rotating disk 2; 104, guide groove 1; 105, guide block 1; 106, clamping shaft 1; 107, guide groove 2; 108, guide block 2; 109, clamping shaft 2; 110, extension jacket; 111, thin-walled pipe; 112, rectangular member; 113, thin-walled flange;

[0032] 2. Driving mechanism; 201. Guide rod; 202. Guide sleeve 1; 203. Connecting rod 1; 204. Guide sleeve 2; 205. Connecting rod 2;

[0033] 3. Moving component 1; 301. Connecting frame 1; 302. Hollow rotary hydraulic cylinder 1; 4. Moving component 2; 401. Connecting frame 2; 402. Hollow rotary hydraulic cylinder 2; 501. Fixed guide rod; 502. Movable guide rod; 503. Fastening bolt; 504. Avoidance groove 1; 505. Avoidance groove 2; 601. Gear 1; 602. Motor; 603. Gear 2. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0036] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, a hydraulic clamping device for a CNC machine tool provided by an embodiment of the present invention includes a mounting frame 101, and further includes: a rotating disk 102 rotatably connected to the mounting frame 101, a rotating disk 2 103 is provided at one end of the rotating disk 102, four guide grooves 104 are evenly provided on the rotating disk 102, the four guide grooves 104 are radially arranged, and a guide block 105 is slidably connected in the four guide grooves 104 along the length direction, and a clamping shaft 106 is fixed to the end of the four guide blocks 105 away from the rotating disk 2 103; four guide grooves 2 107 are evenly provided on the rotating disk 2 103, and the four guide grooves 2 107 is arranged radially, and the four guide grooves 107 are all slidably connected with guide blocks 108 along the length direction, and the four guide blocks 108 are fixed with clamping shafts 109 at one end close to the rotating disk 102; a driving mechanism 2 is provided on the mounting frame 101, and the driving mechanism 2 is used to drive the four guide blocks 105 to move synchronously toward or in opposite directions, and the driving mechanism 2 is used to drive the four guide blocks 108 to move synchronously toward or in opposite directions; the ends of the clamping shaft 106 and the clamping shaft 109 are both slidably connected with an extension sleeve 110, and the extension sleeve 110 is fixed to the clamping shaft 106 or the clamping shaft 109 by bolts.

[0037] In the embodiment of the present invention, when the thin-walled tube 111 is clamped, the four clamping shafts 2 109 are sleeved in the thin-walled tube 111, the driving mechanism 2 drives the four guide blocks 2 108 to move synchronously in opposite directions, the four guide blocks 2 108 drive the clamping shafts 2 109 to move synchronously in opposite directions, the four clamping shafts 2 109 contact the inner wall of the thin-walled tube 111, the driving mechanism 2 drives the four guide blocks 1 105 to move synchronously in opposite directions, the four guide blocks 105 drive the four clamping shafts 1 106 to move synchronously in opposite directions, the four clamping shafts 106 contact the side wall of the thin-walled tube 111, the four clamping shafts 1 106 and the four clamping shafts 2 109 constitute four clamping claws, the four clamping shafts 2 109 support the side wall of the thin-walled tube 111, and the four clamping shafts 1 106 cooperate with the four clamping shafts 2 109 to clamp the side wall of the thin-walled tube 111 (such as Figure 5 As shown), thereby avoiding the problem of deformation of the side wall of the thin-walled tube 111 due to stress when clamping the thin-walled tube 111, and improving the clamping stability of the thin-walled tube 111;

[0038] When clamping a rectangular workpiece, the four guide blocks 105 are at the edge of the rotating disk 102. The four guide blocks 105 are not used. The rectangular workpiece 112 is placed between the four clamping shafts 109. The driving mechanism 2 drives the four guide blocks 108 to move toward each other synchronously. The four guide blocks 108 drive the clamping shafts 109 to move toward each other synchronously. The four clamping shafts 109 contact the opposite sides of the rectangular workpiece 112 and clamp the rectangular workpiece 112 (as shown in FIG. Figure 7 shown);

[0039] When the thin-walled flange 113 is clamped, the bolts on the extension sleeve 110 are loosened, and then the positions of the extension sleeve 110 on the clamping shaft 2 109 and the clamping shaft 1 106 are adjusted so that the clamping length of the clamping shaft 106 is greater than the clamping length of the clamping shaft 2 109. The driving mechanism 2 drives the four guide blocks 105 to move toward each other synchronously. The four guide blocks 105 drive the four clamping shafts 106 to move toward each other synchronously. The four clamping shafts 106 contact the side wall of the long diameter of the thin-walled flange 113. The driving mechanism 2 drives the four guide blocks 105 to move toward each other synchronously. 108 move toward each other synchronously, the four guide blocks 2 108 drive the clamping shaft 2 109 to move toward each other synchronously, the four clamping shaft 2 109 contacts the side wall of the short diameter of the thin-walled flange 113, and then clamps the two side walls of the thin-walled flange 113 at the same time, thereby increasing the clamping area of ​​the side wall of the thin-walled flange 113 and improving the clamping stability of the thin-walled flange 113. In the present invention, the distance between the four clamping shafts 106 and the four clamping shafts 2 109 is adjustable, which facilitates the clamping of thin-walled flanges 113 of different proportional sizes.

[0040] like Figure 1-Figure 5As shown, as a preferred embodiment of the present invention, the driving mechanism 2 includes a guide rod 201 fixed at the axis of one end of the rotating disk 2 103 away from the rotating disk 1 102, and the guide rod 201 is slidably connected with a guide sleeve 1 202 and a guide sleeve 2 204 along the length direction, and the side wall of the guide sleeve 1 202 is evenly connected with four connecting rods 1 203, and the ends of the four connecting rods 1 203 are respectively rotatably connected to the four guide blocks 2 108, and the side wall of the guide sleeve 2 204 is evenly connected with four connecting rods 205, and the ends of the four connecting rods 205 are respectively rotatably connected to the four guide blocks 105, and the mounting frame 101 is provided with a moving component 1 3 and a moving component 2 4, and the moving component 1 3 is used to drive the guide sleeve One 202 moves on the guide rod 201, and the moving component two 4 is used to drive the guide sleeve two 204 to move on the guide rod 201; the moving component one 3 includes a hollow rotary hydraulic cylinder one 302 fixed on the upper end of the mounting frame 101, and the telescopic end of the hollow rotary hydraulic cylinder one 302 is connected to the connecting frame one 301, and the end of the connecting frame one 301 is fixed on the guide sleeve one 202; the moving component two 4 includes a hollow rotary hydraulic cylinder two 402 fixed on the upper end of the mounting frame 101, and the telescopic end of the hollow rotary hydraulic cylinder two 402 is connected to the connecting frame two 401, and the end of the connecting frame two 401 is fixed on the guide sleeve two 204, the connecting frame one 301 is hollow, and the connecting frame two 401 passes through the connecting frame one 301.

[0041] In the embodiment of the present invention, when the four clamping shafts 106 move synchronously toward each other, the hollow rotary hydraulic cylinder 402 drives the connecting frame 401 to move, and the connecting frame 401 drives the guide sleeve 204 to move. Under the guidance of the four guide grooves 104, the guide sleeve 204 drives the four guide blocks 105 to move synchronously toward each other through the four connecting rods 205. The four guide blocks 105 drive the four clamping shafts 106 to move synchronously toward each other.

[0042] When the four clamping shafts 106 move synchronously in the opposite direction, the hollow rotary hydraulic cylinder 402 drives the connecting frame 401 to move in the opposite direction, and the connecting frame 401 drives the guide sleeve 204 to move in the opposite direction. Under the guidance of the four guide grooves 104, the guide sleeve 204 drives the four guide blocks 105 to move synchronously in the opposite direction through the four connecting rods 205. The four guide blocks 105 drive the four clamping shafts 106 to move synchronously in the opposite direction.

[0043] When the four clamping shafts 109 move synchronously toward each other, the hollow rotary hydraulic cylinder 302 drives the connecting frame 301 to move, and the connecting frame 301 drives the guide sleeve 202 to move. Under the guidance of the four guide grooves 107, the guide sleeve 202 drives the four guide blocks 108 to move synchronously toward each other through the four connecting rods 203. The four guide blocks 108 drive the four clamping shafts 109 to move synchronously toward each other.

[0044] When the four clamping shafts 2 109 move synchronously in the opposite direction, the hollow rotary hydraulic cylinder 1 302 drives the connecting frame 1 301 to move in the opposite direction, and the connecting frame 1 301 drives the guide sleeve 1 202 to move in the opposite direction. Under the guidance of the four guide grooves 2 107, the guide sleeve 1 202 drives the four guide blocks 2 108 to move synchronously in the opposite direction through the four connecting rods 1 203, and the four guide blocks 2 108 drive the four clamping shafts 2 109 to move synchronously in the opposite direction.

[0045] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 9 and Figure 10 As shown, as a preferred embodiment of the present invention, the guide rod 201 includes a fixed guide rod 501 and a movable guide rod 502, one end of the fixed guide rod 501 is fixed to the rotating disk 2 103 away from the axis of one end of the rotating disk 102, the movable guide rod 502 is rotatably connected to the other end of the fixed guide rod 501, and the movable guide rod 502 is fixedly connected to the fixed guide rod 501 by a fastening bolt 503. The guide sleeve 1 202 is slidably connected to the fixed guide rod 501, and the guide sleeve 2 204 is slidably connected to the movable guide rod 502. The rotating disk 102 is provided with four avoidance grooves 1 504 for avoiding the movement of the four clamping shafts 106, and the rotating disk 2 103 is provided with four avoidance grooves 2 505 for avoiding the movement of the four guide blocks 105. The rotating disk 2 103 is rotatably connected to one end of the rotating disk 102, and the rotating disk 2 103 is fixedly connected to the rotating disk 1 102 by a fastening bolt 503.

[0046] In the embodiment of the present invention, when the side wall and inner wall of the thin-walled pipe 111 or the normal-thickness pipe need to be processed, the clamping shaft 106 and the clamping shaft 2 109 will block the side wall and inner wall of the thin-walled pipe 111 or the normal-thickness pipe, making it inconvenient to process the side wall and inner wall of the pipe.

[0047] Loosen the fastening bolts 503 and rotate the second rotating disk 103 so that it rotates relative to the first rotating disk 102. The second rotating disk 103 drives the second guide block 108, the second clamping shaft 109, the fixed guide rod 501, the first guide sleeve 202, the first connecting rod 203, and the first connecting frame 301 to rotate. Then, the positions of the four second guide blocks 108 and the four second clamping shafts 109 are adjusted so that the four second clamping shafts 109 and the four first clamping shafts 106 are evenly distributed in a ring. Then, tighten the fastening bolts 503.

[0048] When the four clamping shafts 2 109 and the four clamping shafts 1 106 move synchronously in opposite directions, the four clamping shafts 2 109 and the four clamping shafts 1 106 support the inner wall of the pipe (eg Figure 10 ), when the four clamping shafts 2 109 and the four clamping shafts 1 106 move toward each other synchronously, the four clamping shafts 2 109 and the four clamping shafts 1 106 support the side wall of the pipe (such as Figure 10 ), increase the inner wall of the pipe and the support position of the inner wall, so that the pipe is more evenly stressed, thereby reducing the degree of deformation of the thin-walled pipe 111 and protecting the pipe.

[0049] like Figure 1 and Figure 4 As shown, as a preferred embodiment of the present invention, a motor 602 is fixed on the mounting frame 101, a gear 1 601 is fixed to the rotating end of the motor 602, a gear 2 603 is fixed on the side wall of the rotating disk 1 102, and the gear 2 603 is engaged with the gear 1 601.

[0050] In an embodiment of the present invention, when the processing angle of the workpiece needs to be adjusted, or the workpiece needs to be processed in a rotating state, the motor 602 drives gear 1 601 to rotate, gear 1 601 drives gear 2 603 to rotate, gear 2 603 drives rotating disk 1 102 to rotate, rotating disk 1 102 drives rotating disk 2 103 to rotate, rotating disk 1 102 and rotating disk 2 103 drive the workpiece to rotate, thereby facilitating the processing of the workpiece and avoiding the need to disassemble and reinstall the workpiece when the processing angle of the workpiece needs to be adjusted.

[0051] The above embodiment of the present invention provides a hydraulic clamping device for a CNC machine tool. When clamping a thin-walled pipe 111, the four clamping shafts 109 are sleeved in the thin-walled pipe 111, and the driving mechanism 2 drives the four guide blocks 108 to move synchronously in opposite directions. The four guide blocks 108 drive the clamping shafts 109 to move synchronously in opposite directions. The four clamping shafts 109 contact the inner wall of the thin-walled pipe 111. The driving mechanism 2 drives the four guide blocks 105 to move synchronously in opposite directions. The four guide blocks 105 drive the four clamping shafts 106 to move synchronously in opposite directions. The four clamping shafts 106 contact the side walls of the thin-walled pipe 111. The four clamping shafts 106 and the four clamping shafts 109 constitute four clamping claws. The four clamping shafts 109 support the side walls of the thin-walled pipe 111. The four clamping shafts 106 cooperate with the four clamping shafts 109 to clamp the side walls of the thin-walled pipe 111 (such as Figure 5 As shown), thereby avoiding the problem of deformation of the side wall of the thin-walled tube 111 due to stress when clamping the thin-walled tube 111, and improving the clamping stability of the thin-walled tube 111;

[0052] Adjust the positions of the four guide blocks 2 108 and the four clamping shafts 2 109 so that the four clamping shafts 2 109 and the four clamping shafts 1 106 are evenly distributed in a ring. When the four clamping shafts 2 109 and the four clamping shafts 1 106 move synchronously in opposite directions, the four clamping shafts 2 109 and the four clamping shafts 1 106 support the inner wall of the pipe (such as Figure 10 ), when the four clamping shafts 2 109 and the four clamping shafts 1 106 move toward each other synchronously, the four clamping shafts 2 109 and the four clamping shafts 1 106 support the side wall of the pipe (such as Figure 10 ), increasing the inner wall of the pipe and the supporting position of the inner wall, thereby making the pipe more evenly stressed, thereby reducing the degree of deformation of the thin-walled pipe 111 and protecting the pipe;

[0053] When clamping a rectangular workpiece, the four guide blocks 105 are at the edge of the rotating disk 102. The four guide blocks 105 are not used. The rectangular workpiece 112 is placed between the four clamping shafts 109. The driving mechanism 2 drives the four guide blocks 108 to move toward each other synchronously. The four guide blocks 108 drive the clamping shafts 109 to move toward each other synchronously. The four clamping shafts 109 contact the opposite sides of the rectangular workpiece 112 and clamp the rectangular workpiece 112 (as shown in FIG. Figure 7 shown);

[0054] When the thin-walled flange 113 is clamped, the bolts on the extension sleeve 110 are loosened, and then the positions of the extension sleeve 110 on the clamping shaft 2 109 and the clamping shaft 1 106 are adjusted so that the clamping length of the clamping shaft 106 is greater than the clamping length of the clamping shaft 2 109. The driving mechanism 2 drives the four guide blocks 105 to move toward each other synchronously. The four guide blocks 105 drive the four clamping shafts 106 to move toward each other synchronously. The four clamping shafts 106 contact the side wall of the long diameter of the thin-walled flange 113. The driving mechanism 2 drives the four guide blocks 105 to move toward each other synchronously. 108 move synchronously toward each other, and the four guide blocks 108 drive the clamping shaft 109 to move synchronously toward each other. The four clamping shafts 109 contact the side wall of the short diameter of the thin-walled flange 113, and then clamp the two side walls of the thin-walled flange 113 at the same time, thereby increasing the clamping area of ​​the side wall of the thin-walled flange 113 and improving the clamping stability of the thin-walled flange 113. In the present invention, the spacing between the four clamping shafts 106 and the four clamping shafts 109 is adjustable, thereby facilitating the clamping of thin-walled flanges 113 of different proportional sizes;

[0055] When the processing angle of the workpiece needs to be adjusted, or the workpiece needs to be processed in a rotating state, the motor 602 drives the gear 1 601 to rotate, the gear 1 601 drives the gear 2 603 to rotate, the gear 2 603 drives the rotating disk 1 102 to rotate, the rotating disk 1 102 drives the rotating disk 2 103 to rotate, the rotating disk 1 102 and the rotating disk 2 103 drive the workpiece to rotate, thereby facilitating the processing of the workpiece and avoiding the need to disassemble and reinstall the workpiece when the processing angle of the workpiece needs to be adjusted.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hydraulic clamping device for a CNC machine tool, comprising a mounting frame, characterized in that: Also includes: A rotating disk 1 is rotatably connected to the mounting frame, and a rotating disk 2 is provided at one end of the rotating disk 1. Four guide grooves 1 are evenly arranged on the rotating disk 1. The four guide grooves 1 are radially arranged. A guide block 1 is slidably connected in the four guide grooves 1 along the length direction. A clamping shaft 1 is fixed to the end of the four guide blocks 1 away from the rotating disk 2. Four guide grooves 2 are evenly arranged on the rotating disk 2. The four guide grooves 2 are arranged radially. The four guide grooves 2 are slidably connected with guide blocks 2 along the length direction. The four guide blocks 2 are fixed with clamping shafts 2 at one end close to the rotating disk 1. The mounting frame is provided with a driving mechanism for driving the four guide blocks to move synchronously in one direction or in the opposite direction; the driving mechanism is used to drive the four guide blocks to move synchronously in two directions or in the opposite direction; The ends of the clamping shaft 1 and the clamping shaft 2 are both slidably connected with an extension sleeve, and the extension sleeve is fixed on the clamping shaft 1 or the clamping shaft 2 by bolts; The rotating disk 1 is provided with four avoidance grooves 1 for avoiding the movement of the four clamping shafts 1, and the rotating disk 2 is provided with four avoidance grooves 2 for avoiding the movement of the four guide blocks 1. The rotating disk 2 is rotatably connected to one end of the rotating disk 1, and the rotating disk 2 and the rotating disk 1 are fixedly connected by fastening bolts; The driving mechanism includes a guide rod fixed at the axis of one end of the rotating disk 2 away from the rotating disk 1, a guide sleeve 1 and a guide sleeve 2 being slidably connected to the guide rod along the length direction, four connecting rods 1 are evenly connected to a side wall of the guide sleeve, the ends of the four connecting rods 1 are respectively rotatably connected to the four guide blocks 2, four connecting rods 2 are evenly connected to a side wall of the guide sleeve 2, the ends of the four connecting rods 2 are respectively rotatably connected to the four guide blocks 1, and a moving component 1 and a moving component 2 are provided on the mounting frame, the moving component 1 is used to drive the guide sleeve 1 to move on the guide rod, and the moving component 2 is used to drive the guide sleeve 2 to move on the guide rod; When clamping thin-walled pipe fittings, the four clamping shafts one and the four clamping shafts two form four clamping claws, and the four clamping shafts two support the side walls of the thin-walled pipe fittings. The four clamping shafts one cooperate with the four clamping shafts two to clamp the side walls of the thin-walled pipe fittings; when clamping rectangular workpieces, the four guide blocks two drive the clamping shafts two to move synchronously toward each other, and the four clamping shafts two contact the opposite sides of the rectangular workpiece and clamp the rectangular workpiece; when clamping thin-walled flanges, the four clamping shafts one contact the side walls of the long diameter of the thin-walled flange, and the four clamping shafts two contact the side walls of the short diameter of the thin-walled flange, thereby clamping the two side walls of the thin-walled flange at the same time; when processing the side walls and inner walls of thin-walled pipe fittings or pipe fittings with normal wall thickness, the four clamping shafts two and the four clamping shafts one support the side walls or inner walls of the pipe fittings, thereby increasing the support position of the inner walls and inner walls of the pipe fittings.

2. The hydraulic clamping device for CNC machine tools according to claim 1, characterized in that: The moving component 1 includes a hollow rotary hydraulic cylinder 1 fixed on the upper end of the mounting frame, the telescopic end of the hollow rotary hydraulic cylinder 1 is connected to the connecting frame 1, and the end of the connecting frame 1 is fixed on the guide sleeve 1.

3. The hydraulic clamping device for CNC machine tools according to claim 2, characterized in that: The mobile component 2 includes a hollow rotary hydraulic cylinder 2 fixed on the upper end of the mounting frame. The telescopic end of the hollow rotary hydraulic cylinder 2 is connected to the connecting frame 2. The end of the connecting frame 2 is fixed on the guide sleeve 2. The connecting frame 1 is hollow and the connecting frame 2 passes through the connecting frame 1.

4. The hydraulic clamping device for CNC machine tools according to claim 1, characterized in that: The guide rod includes a fixed guide rod and a movable guide rod. One end of the fixed guide rod is fixed to the axis of the rotating disk 2 away from the rotating disk 1. The movable guide rod is rotatably connected to the other end of the fixed guide rod. The movable guide rod and the fixed guide rod are fixedly connected by fastening bolts. The guide sleeve 1 is slidably connected to the fixed guide rod, and the guide sleeve 2 is slidably connected to the movable guide rod.

5. The hydraulic clamping device for CNC machine tools according to claim 1, characterized in that: A motor is fixed on the mounting frame, a gear one is fixed on the rotating end of the motor, a gear two is fixed on a side wall of the rotating disk, and the gear two is meshed with the gear one.

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