Oil pressure type clamp of vertical lathe

Abstract

The utility model relates to a vertical lathe oil pressure type clamp which comprises a mounting frame, and the mounting frame is fixed to a lathe spindle. The locking assemblies are used for locking and loosening the workpiece, the locking assemblies are detachably fixed to the mounting frame, and the multiple locking assemblies are arranged around the workpiece; the locking oil ways are used for driving the locking assemblies to lock the workpiece, and the multiple locking oil ways correspond to the locking assemblies; the loosening oil ways are used for driving the locking assemblies to loosen the workpiece, and the multiple loosening oil ways correspond to the locking assemblies; the locking oil port is communicated with any one of the locking oil ways; and the loosening oil port is communicated with any loosening oil way. The clamp has the effects that the machining efficiency is improved, and it is guaranteed that workpieces machined through the clamp have the consistency.

Description

Technical Field

[0001] The present application relates to the technical field of vertical lathe processing, and in particular to a hydraulic clamp for a vertical lathe. Background Art

[0002] The biggest difference between a vertical lathe and an ordinary lathe is that the spindle of a vertical lathe is vertical, which is equivalent to standing an ordinary lathe upright. Since its worktable is located in a horizontal position, it is more suitable for processing large and heavy workpieces with a diameter of 1.5 and a short length and complex shapes.

[0003] In the related art, a chuck is generally used to fix the workpiece to be processed. For irregular and special-shaped workpieces, a self-made fixture is required to be connected to the vertical lathe spindle to achieve processing. The self-made fixture mostly uses a mechanical structure to manually lock the workpiece to be processed.

[0004] With respect to the above-mentioned related technologies, when batch processing special-shaped parts is performed, ordinary homemade fixtures are cumbersome to use and the degree of locking is inconsistent each time. Summary of the invention

[0005] In order to improve processing efficiency and ensure workpiece consistency, the present application provides a hydraulic clamp for a vertical lathe.

[0006] The present application provides a vertical lathe hydraulic clamp adopts the following technical solution:

[0007] A hydraulic clamp for a vertical lathe, comprising:

[0008] A mounting frame, the mounting frame being fixed to the lathe spindle;

[0009] A locking assembly, which is used to lock and release the workpiece, and is detachably fixed to the mounting frame, and a plurality of locking assemblies are arranged around the workpiece;

[0010] A locking oil circuit for driving the locking assembly to lock the workpiece, wherein a plurality of locking oil circuits are provided corresponding to the locking assembly;

[0011] A loosening oil circuit for driving the locking assembly to loosen the workpiece, wherein a plurality of the loosening oil circuits are provided corresponding to the locking assembly;

[0012] A locking oil port, the locking oil port being communicated with any locking oil circuit;

[0013] A release oil port is connected to any release oil circuit.

[0014] By adopting the above technical solution, the staff introduces hydraulic oil into the release oil port, and the hydraulic oil drives the locking assembly to the release position through the release oil circuit. The workpiece to be processed is placed on the locking assembly, and hydraulic oil is introduced into the locking oil port. The hydraulic oil drives the locking assembly to lock the workpiece through the locking oil circuit, and the hydraulic oil in the release oil circuit is discharged from the clamp through the release oil port. After the processing is completed, the staff introduces hydraulic oil into the release oil port again, and the locking assembly releases the workpiece, so that the workpiece can be removed from the lathe. In this way, it helps to improve the mechanical properties of the vertical lathe and improve the processing efficiency of the workpiece. At the same time, by controlling the amount of hydraulic oil introduced into the locking oil port, the consistency of each workpiece can be guaranteed.

[0015] Preferably, the locking assembly includes an oil cylinder, a hydraulic cavity is formed in the oil cylinder, a piston rod is arranged in the hydraulic cavity, the piston rod slides and cooperates with the hydraulic cavity in the vertical direction, a piston pad is arranged at the lower end of the piston rod, the piston pad divides the hydraulic cavity into a first cavity and a second cavity, the first cavity and the second cavity are respectively connected to the release oil port and the locking oil port, and a pressure plate is arranged at the upper end of the piston rod.

[0016] By adopting the above technical solution, in the locked state, the hydraulic oil enters the hydraulic chamber from the locking oil port through the locking oil circuit, pushing the piston pad to slide in the vertical direction, so that the pressure plate is pressed against the surface of the workpiece. In this way, the workpiece is locked on the fixture.

[0017] Preferably, a connecting rod is rotatably connected to the middle part of the pressure plate in the length direction, and the side of the connecting rod facing away from the pressure plate in the length direction is rotatably connected to the cylinder body. The rotation direction of the pressure plate and the piston rod is parallel to the rotation direction of the pressure plate and the connecting rod, and the rotation direction of the pressure plate and the connecting rod is parallel to the rotation direction of the connecting rod and the cylinder body.

[0018] By adopting the above technical solution, the first cavity is located at the lower side of the second cavity. When the workpiece needs to be locked, hydraulic oil is introduced into the hydraulic cavity through the locking oil port via the locking oil circuit. The hydraulic oil enters the first cavity, pushes the piston pad and thus pushes the piston rod to move upward. The hydraulic oil in the second cavity is discharged from the clamp along the loosening oil circuit. The end of the pressure plate in the length direction away from the piston rod rotates downward, and the lower side of the pressure plate abuts against the workpiece. When the workpiece needs to be loosened, hydraulic oil is introduced into the second cavity through the loosening oil port via the loosening oil circuit. The hydraulic oil drives the piston rod to move downward, and the end of the pressure plate in the length direction away from the piston rod rotates upward, and the pressure plate loosens the workpiece.

[0019] Preferably, an abutment column is provided on the lower side of the pressure plate, the upper side of the abutment column is spaced apart from the pressure plate, and the lower end of the abutment column is fixed on the mounting frame.

[0020] By adopting the above technical solution, the abutment column and the pressure plate clamp the workpiece. Fixing the workpiece in this way can minimize the contact area between the fixture and the workpiece while ensuring the stability of the workpiece, thereby helping to reduce damage to the workpiece caused by the fixture during the installation and processing of the workpiece.

[0021] Preferably, guide pins corresponding to the workpieces are fixed on the mounting frame, and at least two guide pins are provided on the mounting frame.

[0022] By adopting the above technical solution, the guide pins are used to facilitate the workers to locate the position of the workpiece. At the same time, the two pins on one side are used to limit the freedom of the workpiece without damaging the workpiece, making it convenient for the fixture to fix the workpiece, thereby achieving the effect of improving the consistency of the workpiece processed by the fixture.

[0023] Preferably, a rotary joint connected to the hydraulic pump is also provided on the lower side of the mounting frame, and the locking oil port and the releasing oil port are both located on the rotary joint.

[0024] By adopting the above technical solution, in actual use, the fixture mounting frame will rotate synchronously with the machine tool spindle. During high-speed rotation processing, the rotary joint allows the staff to easily introduce hydraulic oil into the fixture.

[0025] Preferably, a distribution base is detachably fixed to the lower side of the mounting frame, and any of the locking oil circuits are connected and arranged in the distribution base, and any of the loosening oil circuits are connected and arranged in the distribution base.

[0026] By adopting the above technical solution, the multiple locking oil circuits connected to each other ensure that the hydraulic oil pressure in each locking oil circuit is the same, which helps to ensure that the locking force of each locking component on the workpiece is consistent, thereby helping to ensure the stability of the workpiece on the fixture. The multiple loosening oil circuits connected to each other facilitate the simultaneous loosening of each locking component, facilitate the rapid disassembly of the workpiece, and help improve the processing efficiency.

[0027] Preferably, a distribution joint is also fixed on the distribution base, and the locking oil circuit and the releasing oil circuit are both connected and arranged on the distribution joint. The distribution joint is also respectively connected and arranged with a locking connecting pipe and a releasing connecting pipe, the locking connecting pipe is connected to the locking oil circuit, and the releasing connecting pipe is connected to the releasing oil circuit, one end of the locking connecting pipe facing away from the distribution joint is connected and arranged on the rotating joint, and one end of the releasing connecting pipe facing away from the distribution joint is connected and arranged on the rotating joint.

[0028] By adopting the above technical solution, the distribution joint helps to ensure that when the distribution base rotates with the lathe spindle, the locking connecting pipe and the loosening connecting pipe do not rotate with the distribution base, thereby facilitating the connection of the locking oil circuit, the loosening oil circuit and the hydraulic pump. The rotating joint and the distribution joint separate the movement of the locking connecting pipe, the loosening connecting pipe and other structures, which helps to reduce the situation where the rotation of some structures driven by the lathe spindle affects the transmission effect of the locking connecting pipe and the loosening connecting pipe during processing.

[0029] Preferably, the locking connecting tube and the loosening connecting tube are both seamless steel tubes, and the two ends of the locking connecting tube are respectively inserted into the distribution joint and the rotary joint along their own axial direction, and the two ends of the loosening connecting tube are respectively inserted into the distribution joint and the rotary joint along their own axial direction. One end of the locking connecting tube in any axial direction is axially statically sealed with the corresponding joint, and one end of the loosening connecting tube in any axial direction is axially statically sealed with the corresponding joint.

[0030] By adopting the above technical solution, it is convenient to install the locking connection pipe and the loosening connection pipe in a very small space, so as to connect the hydraulic oil to the distribution base. At the same time, the plug-in installation method and the axial static seal between the corresponding one end and the joint ensure the transmission effect of the locking connection pipe and the loosening connection pipe, and the staff can install the locking connection pipe and the loosening connection pipe conveniently and quickly.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. Multiple hydraulically driven locking components make it easy for workers to fix the workpiece on the vertical lathe spindle, which helps to improve the efficiency of machining work;

[0033] 2. The multiple locking oil circuits and loosening oil circuits connected to each other help to improve the mechanization degree of the fixture, making it easier for workers to disassemble and assemble workpieces, thereby improving processing efficiency;

[0034] 3. The correspondingly arranged pressure plates and abutment columns can minimize the contact area between the fixture and the workpiece while ensuring the stability of the workpiece, thereby helping to reduce damage to the workpiece caused by the fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is an axonometric diagram of the overall structure of the hydraulic clamp of a vertical lathe mainly embodied in the embodiment of the present application;

[0036] Figure 2 is a cross-sectional view mainly showing the internal structure of the locking assembly in the embodiment of the present application;

[0037] Figure 3 This is an axonometric diagram of the embodiment of the present application mainly showing the locking assembly and the internal oil circuit of the mounting frame;

[0038] Figure 4 It is a cross-sectional view of the internal oil circuit of the distribution joint and the rotary joint according to the embodiment of the present application.

[0039] Figure numerals: 100, workpiece; 1, mounting frame; 2, locking assembly; 21, cylinder; 22, hydraulic chamber; 221, first chamber; 222, second chamber; 23, piston pad; 24, piston rod; 25, pressure plate; 26, connecting rod; 27, sealing plug; 3, abutment column; 4, guide pin; 5, distribution base; 51, distribution joint; 6, housing; 61, locking connecting pipe; 62, releasing connecting pipe; 7, rotating joint; 71, locking joint; 711, locking oil port; 72, releasing joint; 721, releasing oil port; 73, fixing frame; 8, locking oil circuit; 9, releasing oil circuit. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-4 This application is described in further detail.

[0041] The embodiment of the present application discloses a hydraulic clamp for a vertical lathe.

[0042] See also Figure 1-Figure 3 The hydraulic clamp of the vertical lathe includes a mounting frame 1, and the mounting frame 1 is relatively fixed to the lathe spindle. During the processing, the mounting frame 1 rotates synchronously with the lathe spindle. A locking assembly 2 is arranged on the mounting frame 1. A rotary joint 7 is arranged on the lower side of the mounting frame 1, and the rotary joint 7 is connected to the liquid pump. A locking oil port 711 and a release oil port 721 are arranged on the rotary joint 7. The locking oil port 711 is connected to a locking oil circuit 8, and the locking oil circuit 8 controls the locking assembly 2 to lock the workpiece 100. The release oil port 721 is connected to a release oil circuit 9, and the release oil circuit 9 controls the locking assembly 2 to release the workpiece 100.

[0043] See also Figure 2The locking assembly 2 includes an oil cylinder 21, and the oil cylinder 21 is detachably fixed to the mounting frame 1. A hydraulic chamber 22 is provided in the oil cylinder 21, and the lower side of the hydraulic chamber 22 is open. A sealing plug 27 is provided in the hydraulic chamber 22, and the sealing plug 27 seals the hydraulic chamber 22. A piston pad 23 is also provided in the hydraulic chamber 22, and the piston pad 23 slides and cooperates with the hydraulic chamber 22 in the vertical direction. The piston pad 23 divides the hydraulic chamber 22 into a first cavity 221 and a second cavity 222, and the first cavity 221 is located at the lower side of the second cavity 222. The first cavity 221 is connected to the locking oil circuit 8, and the second cavity 222 is connected to the release oil circuit 9. Hydraulic oil is introduced into the first cavity 221 through the locking oil circuit 8, and the hydraulic oil will push the piston pad 23 to slide upward, and the hydraulic oil in the second cavity 222 will be discharged from the second cavity 222 along the release oil circuit 9. On the contrary, by releasing the oil port 721 and introducing hydraulic oil into the second cavity 222 , the hydraulic oil will push the piston pad 23 to slide downward, and the hydraulic oil in the first cavity 221 will be discharged from the first cavity 221 along the locking oil path 8 .

[0044] A piston rod 24 is formed on the piston pad 23, and the piston rod 24 passes through the hydraulic chamber 22 from bottom to top in the vertical direction. A pressure plate 25 is provided at the upper end of the piston rod 24, and one end of the pressure plate 25 in the length direction is rotatably connected to the piston rod 24 in the horizontal direction. A connecting rod 26 is also provided in the middle of the pressure plate 25, and the upper end of the connecting rod 26 is rotatably connected to the middle of the pressure plate 25. The lower end of the connecting rod 26 is rotatably connected to the cylinder body of the oil cylinder 21. The rotation axis of the pressure plate 25 and the piston rod 24 is parallel to the rotation axis of the pressure plate 25 and the connecting rod 26, and the rotation axis of the pressure plate 25 and the connecting rod 26 is parallel to the rotation axis of the connecting rod 26 and the cylinder body of the oil cylinder 21.

[0045] See also Figure 1-Figure 3 , the mounting frame 1 is also provided with an abutment column 3, which is arranged at the lower side of the pressure plate 25. When installing the workpiece 100, hydraulic oil is introduced into the locking oil port 711, and the hydraulic oil enters the first cavity 221 through the locking oil path 8, the piston pad 23 slides upward in the vertical direction, and the piston rod 24 pushes the end of the pressure plate 25 close to the piston rod 24 to rotate upward, and the connecting rod 26 causes the end of the pressure plate 25 away from the piston rod 24 to rotate downward, so that the pressure plate 25 and the abutment column 3 clamp the workpiece 100. When disassembling the workpiece 100, hydraulic oil is introduced into the release oil port 721, and the hydraulic oil enters the second cavity 222 through the release oil path 9, and the hydraulic oil in the first cavity 221 is discharged from the locking oil port 711 along the locking oil path 8 to the fixture. The hydraulic oil pushes the piston pad 23 to slide downward in the vertical direction, and the piston rod 24 drives the end of the pressure plate 25 close to the piston rod 24 to rotate downward, so that the end of the pressure plate 25 away from the piston rod 24 rotates upward, thereby releasing the clamp. The abutment column 3 helps to reduce the contact area between the clamp and the workpiece 100, thereby helping to reduce the damage of the clamp to the workpiece 100 when clamping for a long time.

[0046] A plurality of locking assemblies 2 are arranged on the mounting frame 1 around the workpiece 100, and the number of the abutment columns 3 corresponds to the number of the locking assemblies 2. In this embodiment, four locking assemblies 2 and four abutment columns 3 are arranged.

[0047] The mounting frame 1 can also be detachably fixed with a guide pin 4, which is arranged correspondingly to the positioning hole on the workpiece 100. At least two guide pins 4 are arranged on the mounting frame 1. The guide pins 4 facilitate the staff to position the workpiece 100 and install the workpiece 100.

[0048] See also Figure 1-Figure 4 A distribution base 5 is provided at the lower side of the mounting frame 1. The distribution base 5 and the mounting frame 1 are detachably fixed, and the locking oil circuit 8 and the releasing oil circuit 9 are located in the distribution base 5 and the mounting frame 1. Any locking oil circuit 8 is connected in the distribution base 5, and any releasing oil circuit 9 is connected in the distribution base 5, and any locking oil circuit 8 is not connected to any releasing oil circuit 9. The multiple connected locking oil circuits 8 can ensure that the hydraulic oil pressure in each locking oil circuit 8 is the same, so that the locking force of each locking component 2 on the workpiece 100 is consistent, which helps to ensure the stability of the workpiece 100 on the fixture. At the same time, the connected locking oil circuits 8 and the connected releasing oil circuits 9 facilitate the simultaneous action of each locking component 2, which helps to improve the operating efficiency of the fixture.

[0049] A distribution joint 51 is fixed to the lower side of the distribution base 5, and the housing 6 of the distribution joint 51 is detachably fixed to the distribution base 5. The axial direction of the distribution joint 51 is coaxially arranged with the main shaft of the lathe, and a locking connection pipe 61 and a loosening connection pipe 62 are arranged on the distribution joint 51. The locking connection pipe 61 is connected to the locking oil circuit 8 through the distribution joint 51, and the loosening connection pipe 62 is connected to the loosening oil circuit 9 through the distribution joint 51. The locking connection pipe 61 and the loosening connection pipe 62 are respectively inserted into the distribution joint 51.

[0050] The rotary joint 7 includes a locking joint 71 and a releasing joint 72. The locking oil port 711 is arranged on the locking joint 71, and the releasing oil port 721 is arranged on the releasing joint 72. The housing of the locking joint 71 and the housing of the releasing joint 72 are detachably fixed, and the releasing joint 72 is coaxially arranged with the locking joint 71. The locking joint 71 is inserted into the releasing joint 72. The ends of the locking connecting pipe 61 and the releasing connecting pipe 62 that are away from the distribution joint 51 are respectively inserted into the releasing joint 72. The locking connecting pipe 61 is connected to the locking oil port 711, and the releasing connecting pipe 62 is connected to the releasing oil port 721. A fixing frame 73 is arranged on the side of the rotary joint 7 close to the distribution base 5, and the fixing frame 73 facilitates the staff to fix the rotary joint 7. The outer sides of the locking connecting pipe 61 and the releasing connecting pipe 62 are also sleeved with a shell 6, and the shell 6 protects the locking connecting pipe 61 and the releasing connecting pipe 62 in the working state from being affected by other components.

[0051] Both the loosening connection pipe 62 and the locking connection pipe 61 are seamless steel pipes. Any end of any seamless steel pipe is inserted into the corresponding joint and radially statically sealed with the corresponding joint. In the embodiment of the present application, a sealing gasket is used for static sealing. Seamless steel pipes have high bending and torque resistance. In actual work, the distribution base 5 will rotate at high speed with the lathe spindle. The distribution joint 51 and the rotary joint 7 prevent the locking connection pipe 61 and the loosening connection pipe 62 from rotating at high speed with the distribution base 5, thereby separating the locking connection pipe 61 and the loosening connection pipe 62 from the movement of other structures in the fixture, thereby reducing the impact of high-speed rotation on oil circuit transmission. It is convenient for staff to connect the locking oil circuit 8 and the loosening oil circuit 9 to the corresponding liquid pumps respectively.

[0052] The implementation principle of a hydraulic clamp for a vertical lathe in the embodiment of the present application is as follows: the staff fixes the clamp on the vertical lathe. When the hydraulic oil is not introduced into the clamp, the pressure plate 25 is in an active state, the staff puts the workpiece 100 on the abutment column 3, and introduces the hydraulic oil into each hydraulic cavity 22 through the locking oil port 711 and the locking oil circuit 8. The piston pad 23 in any hydraulic cavity 22 slides upward in the vertical direction, and the piston pad 23 drives the piston rod 24 and thus drives the pressure plate 25 to rotate. The end of the pressure plate 25 away from the piston rod 24 is pressed against the surface of the clamp, so that the workpiece 100 and the clamp are relatively fixed. After the processing is completed, the staff introduces hydraulic oil into the release oil port 721, and the hydraulic oil enters the second cavity 222 along the release oil circuit 9, so that the piston pad 23 slides downward in the vertical direction, and the piston pad 23 drives the piston rod 24 to pull the pressure plate 25 to rotate. The end of the pressure plate 25 away from the piston rod 24 releases the clamp. The staff can remove the workpiece 100 that has been processed from the fixture to install another workpiece 100. In this way, it helps to improve the speed of the staff to disassemble and assemble the workpiece 100, thereby helping to improve the processing efficiency, and can ensure that the workpiece 100 processed by the fixture has consistency.

[0053] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hydraulic clamp for a vertical lathe, characterized in that: include: A mounting frame (1), wherein the mounting frame (1) is fixed to a main shaft of a lathe; A locking assembly (2), the locking assembly (2) being used to lock and release the workpiece (100), the locking assembly (2) being detachably fixed to the mounting frame (1), and a plurality of the locking assemblies (2) being arranged around the workpiece (100); A locking oil circuit (8) for driving the locking assembly (2) to lock the workpiece (100), wherein a plurality of the locking oil circuits (8) are provided corresponding to the locking assembly (2); a loosening oil circuit (9) for driving the locking assembly (2) to loosen the workpiece (100), wherein a plurality of the loosening oil circuits (9) are provided corresponding to the locking assembly (2); A locking oil port (711), wherein the locking oil port (711) is in communication with any locking oil passage (8); A release oil port (721), wherein the release oil port (721) is connected to any release oil circuit (9).

2. The hydraulic clamp for a vertical lathe according to claim 1, characterized in that: Any of the locking assemblies (2) comprises an oil cylinder (21), a hydraulic chamber (22) being formed in the oil cylinder (21), a piston rod (24) being arranged in the hydraulic chamber (22), the piston rod (24) being slidably matched with the hydraulic chamber (22) in a vertical direction, a piston pad (23) being arranged at the lower end of the piston rod (24), the piston pad (23) dividing the hydraulic chamber (22) into a first chamber (221) and a second chamber (222), the first chamber (221) and the second chamber (222) being respectively connected to a release oil port (721) and a lock oil port (711), and a pressure plate (25) being arranged at the upper end of the piston rod (24).

3. The hydraulic clamp for a vertical lathe according to claim 2, characterized in that: A connecting rod (26) is rotatably connected to the middle portion of the pressure plate (25) in the length direction; a side of the connecting rod (26) in the length direction away from the pressure plate (25) is rotatably connected to the cylinder body of the oil cylinder (21); a rotation direction of the pressure plate (25) and the piston rod (24) is parallel to a rotation direction of the pressure plate (25) and the connecting rod (26); and a rotation direction of the pressure plate (25) and the connecting rod (26) is parallel to a rotation direction of the connecting rod (26) and the cylinder body of the oil cylinder (21).

4. The hydraulic clamp for a vertical lathe according to claim 2, characterized in that: An abutment column (3) is arranged at the lower side of the pressing plate (25); the upper side of the abutment column (3) is arranged at a corresponding interval to the pressing plate (25); and the lower end of the abutment column (3) is fixed to the mounting frame (1).

5. The hydraulic clamp for a vertical lathe according to claim 1, characterized in that: A guide pin (4) corresponding to the workpiece (100) is also fixed on the mounting frame (1), and at least two guide pins (4) are provided on the mounting frame (1).

6. The hydraulic clamp for a vertical lathe according to claim 1, characterized in that: A rotary joint (7) is also provided on the lower side of the mounting frame (1), and the locking oil port (711) and the releasing oil port (721) are both located on the rotary joint (7).

7. The hydraulic clamp for a vertical lathe according to claim 6, characterized in that: A distribution base (5) is also detachably fixed to the lower side of the mounting frame (1), and any of the locking oil circuits (8) are connected and arranged in the distribution base (5), and any of the loosening oil circuits (9) are connected and arranged in the distribution base (5).

8. The hydraulic clamp for a vertical lathe according to claim 7, characterized in that: A distribution joint (51) is also fixed on the distribution base (5); the locking oil circuit (8) and the loosening oil circuit (9) are both connected and arranged on the distribution joint (51); a locking connecting pipe (61) and a loosening connecting pipe (62) are also respectively connected and arranged on the distribution joint (51); the locking connecting pipe (61) is connected to the locking oil circuit (8); the loosening connecting pipe (62) is connected to the loosening oil circuit (9); one end of the locking connecting pipe (61) facing away from the distribution joint (51) is connected and arranged on the rotary joint (7); and one end of the loosening connecting pipe (62) facing away from the distribution joint (51) is connected and arranged on the rotary joint (7).

9. The hydraulic clamp for a vertical lathe according to claim 8, characterized in that: The locking connection tube (61) and the loosening connection tube (62) are both seamless steel tubes. The two ends of the locking connection tube (61) are respectively inserted into the distribution joint (51) and the rotary joint (7) along the axial direction of the locking connection tube (61). The two ends of the loosening connection tube (62) are respectively inserted into the distribution joint (51) and the rotary joint (7) along the axial direction of the locking connection tube (61). One end of the locking connection tube (61) in any axial direction is axially statically sealed with the corresponding joint. One end of the loosening connection tube (62) in any axial direction is axially statically sealed with the corresponding joint.

Images