Numerical control servo hydraulic punching machine

Abstract

The invention provides a numerical control servo hydraulic punching machine. The numerical control servo hydraulic punching machine comprises a machine body, a driving assembly, a hydraulic system, a cooling device and a hydraulic cylinder. A workbench is arranged in the machine body, and each end corner of the workbench is fixedly connected with the machine body through a limiting fixing seat; the driving assembly comprises an oil pump motor and an oil pump assembly, and the hydraulic system comprises an oil inlet electromagnetic valve, an oil outlet electromagnetic valve, a hydraulic pressure gauge, a plunger lifting oil inlet pipe, a plunger descending oil inlet pipe and a cooling oil outlet pipe. Circulation of oil suction and oil pressing of the hydraulic cylinder is achieved through cooperation of the oil pump motor and the oil pump assembly, a plunger in the hydraulic cylinder moves stably in combination with the hydraulic system, and elastic deformation energy is released stably through control over hydraulic pressure by the hydraulic system and the oil pump motor. The effects of fast descending, slow pressurizing, product forming (punching and shearing), pressure maintaining, pressure releasing and fast return stroke are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic machines, more particularly to a numerical control servo hydraulic punch. BACKGROUND

[0002] In the traditional process of pressing various special-shaped parts, manual operation of the pressing mechanism is usually adopted, which is not only cumbersome but also requires a large amount of labor. In the prior art, the pressing mechanism is operated and processed by an automatic hydraulic machine. The hydraulic machine is a mechanical device that uses liquid as the working medium and utilizes Pascal's law to drive the liquid pressure. It is commonly used in the pressing process and forming process of products such as metal, plastic, rubber, wood, and powder. The working efficiency is significantly improved, and the working efficiency is improved.

[0003] Because the hydraulic machine can generate a large force, it is used to forge metal. When hydraulic forming is performed by the hydraulic machine, the forging blank has a complex and variable shape. During the forging process, the hydraulic machine is inevitably subjected to eccentric loading, which causes errors in the flatness of the mold. This can lead to uneven pressure, resulting in processing errors in the flatness of the blank. In addition, under the premise of uneven stress on the entire machine, the parallelism of the movable cross beam cannot be ensured, which leads to a low yield of good products and greatly affects the service life of the mold. When using a hydraulic machine, the ordinary hydraulic machine has a slow working speed and low efficiency, which cannot meet the requirements of high-speed forming. During the stamping process, the speed is too fast, which can cause the raw materials to be squeezed and scattered. In addition to pushing the cylinder plunger down to complete the work, the hydraulic machine also causes elastic deformation of the cylinder body and the column to different degrees, which accumulates a large amount of energy. When the pressure is maintained, the upper chamber of the cylinder is connected to the oil tank, and the hydraulic energy in the upper chamber and the elastic deformation energy accumulated in the body and other parts are suddenly released. The body also quickly rebounds, which can produce strong vibration and loud noise. SUMMARY

[0004] The present application improves the prior art in view of the above shortcomings and provides a numerical control servo hydraulic punch, which can effectively ensure the levelness of the mold. The plunger rod uses hydraulic feeding to achieve automatic control, which can effectively save manpower and reduce labor intensity. While improving the hydraulic efficiency, the down pressure speed during the stamping process is effectively controlled. The technical scheme is as follows:

[0005] A numerical control servo hydraulic punch comprises a body, a driving assembly connected to the body, a hydraulic system, a cooling device, and a hydraulic cylinder.

[0006] A workbench is installed in the body. Each end angle of the workbench is connected to a limiting fixed seat, and the workbench is fixedly connected to the body through the limiting fixed seat. A fixed mold is detachably connected to the workbench.

[0007] The driving assembly comprises an oil pump motor and an oil pump assembly connected with the oil pump motor, and the oil pump motor is used to drive the oil pump assembly to circulate oil suction and oil compression;

[0008] The hydraulic system is arranged at the upper end of the machine body, and comprises an oil inlet electromagnetic valve, an oil outlet electromagnetic valve, a hydraulic gauge, a plunger lifting oil inlet pipe, a plunger lowering oil inlet pipe and a cooling oil outlet pipe, the plunger lifting oil inlet pipe and the plunger lowering oil inlet pipe are connected with the oil inlet electromagnetic valve, and the cooling oil outlet pipe is connected with the oil outlet electromagnetic valve;

[0009] The cooling device is connected with the cooling oil outlet pipe;

[0010] The hydraulic cylinders are connected with the plunger lifting oil inlet pipe and the plunger lowering oil inlet pipe respectively.

[0011] Compared with the prior art, the beneficial effects of the present application are as follows: by arranging a workbench in the machine body, the workbench is connected with the machine body through a limiting fixing seat, the workbench is installed and fixed in a horizontal state, the horizontal degree of the fixing die is effectively ensured, the fixing die is connected with the workbench in a detachable manner, different blank materials can be formed by replacing the fixing die; the oil pump motor and the oil pump assembly are combined to realize the circulation of oil suction and oil compression of the hydraulic cylinder, the plunger in the hydraulic cylinder moves smoothly in combination with the hydraulic system, the speed in the stamping process is avoided to be too fast while improving the hydraulic efficiency, the hydraulic control of the hydraulic system and the oil pump motor is realized, when the real-time pressure value of the hydraulic gauge is too high, the oil pump motor and the oil outlet electromagnetic valve are controlled by the electric control system, the stable release of the hydraulic energy of the upper cavity of the hydraulic cylinder and the elastic deformation energy accumulated in the machine body part is realized, so that the hydraulic cylinder is stably and effectively relieved, the equipment is protected and the service life is prolonged, the relief noise is eliminated, the effects of fast downward movement, slow pressure increase, product forming (stamping and shearing), pressure maintaining, pressure relief and fast return are realized; the speed, stroke and pressure can be adjusted, the actions that cannot be completed by the traditional punch press are solved, the functions of fixed stroke, fixed pressure and pressure maintaining are realized, the deformation generated in the production process of the pressure-increasing and flattening product is realized, and the flatness of the produced product is ensured.

[0012] Optionally, the machine body comprises a base, the front end and the rear end of the base are connected with a front panel and a rear panel respectively, the two sides of the front panel and the rear panel are connected with a stand respectively, and the limiting fixing seat is fixedly connected with the corresponding front panel, rear panel and stand.

[0013] By adopting the above structure, in combination with the front panel, the rear panel and the connected stand, the stability of the machine body is improved, the malignant twist and deformation of the machine body part are avoided, and the service life of the machine body is improved.

[0014] Optionally, the front panel and the rear panel are respectively connected with at least two groups of directional limiting plates, and the hydraulic cylinder is connected through the directional limiting plates.

[0015] Optionally, a support plate is connected around the hydraulic cylinder between the front panel and the rear panel, and the support plate is connected with the hydraulic cylinder through directional limiting plates.

[0016] By adopting the above structure, the support plate and the front panel and the rear panel are connected around the hydraulic cylinder through the directional limiting plates, the balance of the hydraulic cylinder is realized, and the perpendicularity of the hydraulic cylinder is ensured.

[0017] Optionally, the bottom of the workbench is connected with a bottom plate, the bottom plate is connected with a cylinder body support seat, the middle part of the cylinder body support seat is fixedly connected with the hydraulic cylinder corresponding to the workbench, the bottom plate is connected with a first lower shaft sleeve on both sides of the cylinder body support seat, both the first lower shaft sleeves are provided with a first positioning rod, one end of the first positioning rod is fixedly connected with the bottom plate, the other end of the first positioning rod is provided with a first upper shaft sleeve, one end of the first upper shaft sleeve is connected with the machine body, at least two groups of second shaft sleeves are connected between the upper part of the cylinder body support seat and the machine body, the second shaft sleeves are movably provided with a second positioning rod, and the second positioning rod penetrates the cylinder body support seat and is connected with the fixed mold.

[0018] By adopting the above structure, the front panel, the rear panel and the support plate are arranged around the hydraulic cylinder and connected with the hydraulic cylinder through the directional limiting plates, the first upper shaft sleeve, the first lower shaft sleeve, the first positioning rod, the second positioning rod and the second shaft sleeve are combined, the gantry type eight-way guide is adopted, and four groups of directional limiting plates are additionally arranged in front of and behind and left and right of the oil cylinder to assist the oil cylinder for balancing the whole machine, so that the parallelism of the movable cross beam can be ensured under the premise that the product mold is seriously stressed unevenly in production, the product quality and the service life of the mold in production are ensured, the perpendicularity of the hydraulic cylinder is ensured, and the side thrust of the hydraulic cylinder is borne under the eccentric load.

[0019] Optionally, the machine body is provided with a hydraulic oil tank, the hydraulic oil tank is communicated with a main oil inlet pipe, and the main oil inlet pipe is communicated with an oil pump assembly.

[0020] By adopting the above structure, the main oil inlet pipe is used for connecting the hydraulic oil tank and the oil pump assembly, and the hydraulic oil tank supplies oil to the oil pump assembly through the main oil inlet pipe.

[0021] Optionally, the workbench comprises a mold base and positioning plates connected to both sides of the mold base, both ends of the positioning plates are respectively connected with corresponding limiting fixed seats, and the upper parts of the mold base are connected with the two positioning plates through triangular supports.

[0022] Optionally, the limiting fixing base comprises a connecting plate and a plug-in plate, the plug-in plate is in T-shaped structure, one end of the plug-in plate is connected with the positioning plate, and the other end of the plug-in plate is connected with the connecting plate.

[0023] By adopting the above structure, the triangular support and the limiting fixing base can ensure the levelness of the fixed mold, and bear the side thrust of the workbench under eccentric load, thereby realizing the function of dispersing and balancing the eccentric load of the workbench.

[0024] Optionally, the cooling device comprises a radiator, a cooling oil outlet pipe and an oil tank oil inlet pipe in communication with the radiator, and the machine body is connected with an oil filter, and the oil filter is in communication with the oil tank oil inlet pipe.

[0025] By adopting the above structure, the oil filter can filter the liquid output by the hydraulic cylinder, and the filtered liquid is conveyed to the hydraulic oil tank through the oil tank oil inlet pipe, so that the used liquid with impurities can be prevented from returning to the oil tank, thereby avoiding damage to the plunger and the inner wall of the hydraulic cylinder when the liquid is used again.

[0026] The hydraulic cylinder comprises an outer fixing sleeve, a cylinder barrel and a plunger rod, and the outer fixing sleeve is fixedly connected with the machine body. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows:

[0028] Figure 1 For the perspective view of the present application Figure 1 ;

[0029] Figure 2 For the perspective view of the present application Figure 2 ;

[0030] Figure 3 For the front view of the present application

[0031] Figure 4 For the left view of the present application

[0032] Figure 5 For the top view of the present application

[0033] Figure 6 For the A-A sectional view of the present application Figure 3

[0034] For the B-B sectional view of the present application Figure 7 Figure 4 For the C-C sectional view of the present application

[0035] Figure 8 Figure 3 For the C-C sectional view of the present application

[0036] ​​1, body; 2, drive assembly; 3, hydraulic system; 4, cooling device; 5, hydraulic cylinder; 6, workbench; 7, limiting fixed seat; 8, fixed die; 9, oil pump motor; 10, oil pump assembly; 11, oil inlet solenoid valve; 12, oil outlet solenoid valve; 13, hydraulic gauge; 14, plunger lifting oil inlet pipe; 15, plunger lowering oil inlet pipe; 16, cooling oil outlet pipe; 17, radiator; 18, oil tank oil inlet pipe; 19, outer fixed sleeve; 20, cylinder barrel; 21, plunger rod; 23, base; 24, front panel; 25, rear panel; 26, stand; 27, directional limiting plate; 28, support plate; 29, bottom plate; 30, cylinder body support seat; 31, first positioning rod; 32, first upper shaft sleeve; 33, first lower shaft sleeve; 34, hydraulic oil tank; 35, main oil inlet pipe; 36, die seat; 37, positioning plate; 38, triangular support; 39, connecting plate; 40, plug-in plate; 41, oil filter; 42, second shaft sleeve; 43, second positioning rod. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0038] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0039] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. Figures 1 to 8 A numerical control servo hydraulic punch is described.

[0041] As shown in Figures 1 to 8 The present application provides a numerical control servo hydraulic punch, which comprises a body 1 and a drive assembly 2, a hydraulic system 3, a cooling device 4 and a hydraulic cylinder 5 connected to the body 1.

[0042] The machine body 1 is provided with a workbench 6, the workbench 6 is respectively connected with a limiting fixed seat 7 at each end corner, and is fixedly connected with the machine body 1 through the limiting fixed seat 7, the limiting fixed seat 7 is connected between the workbench 6 and the machine body 1, so that the workbench 6 can be prevented from tilting, and the levelness of the workbench 6 is ensured, and the fixed die 8 is detachably connected on the workbench 6;

[0043] The driving assembly 2 comprises an oil pump motor 9 and an oil pump assembly 10 connected with the oil pump motor 9, the oil pump motor 9 is used for driving the oil pump assembly 10 to circulate oil suction and oil pressing; the oil pump assembly 10 is a kind of hydraulic element for providing pressurized liquid for hydraulic transmission, and is a kind of pump; its function is to convert the mechanical energy of the oil pump motor 9 into pressure energy of liquid, the oil pump assembly 10 is driven to rotate by the oil pump motor 9, the oil pump assembly 10 applies oil pressure to the hydraulic cylinder 5, when the plunger is lifted to the oil inlet pipe 14 to deliver oil pressure to push the plunger to move upward, the liquid in the upper cavity of the hydraulic cylinder 5 is discharged to the cooling device 4 through the one-way valve, when the plunger is lowered to the oil inlet pipe 15 to deliver oil pressure to push the plunger to move downward, the liquid in the lower cavity of the hydraulic cylinder 5 is discharged to the cooling device 4 through the one-way valve.

[0044] The hydraulic system 3 is arranged at the upper end of the machine body 1, and comprises an oil inlet electromagnetic valve 11, an oil outlet electromagnetic valve 12, a hydraulic gauge 13, a plunger lifting oil inlet pipe 14, a plunger lowering oil inlet pipe 15 and a cooling oil outlet pipe 16, the plunger lifting oil inlet pipe 14 and the plunger lowering oil inlet pipe 15 are connected with the oil inlet electromagnetic valve 11, and the cooling oil outlet pipe 16 is connected with the oil outlet electromagnetic valve 12; the electromagnetic valve is used for controlling oil flow, the plunger lifting oil inlet pipe 14 and the plunger lowering oil inlet pipe 15 are respectively connected with the oil inlet electromagnetic valve 11, the oil inlet frequency of the plunger lifting oil inlet pipe 14 and the plunger lowering oil inlet pipe 15 is controlled, the oil outlet frequency of the cooling oil outlet pipe 16 is controlled by the oil outlet electromagnetic valve 12, and the plunger lifting oil inlet pipe 14, the plunger lowering oil inlet pipe 15 and the cooling oil outlet pipe 16 are respectively connected with the hydraulic gauge 13, and the hydraulic gauge 13 is used for measuring the pressure of the upper cavity and the lower cavity of the hydraulic cylinder 5 when liquid is injected.

[0045] The hydraulic cylinder 5 comprises an outer fixed sleeve 19, a cylinder barrel 20 and a plunger rod 21, the outer fixed sleeve 19 is fixedly connected with the machine body 1, and the embryo material is processed through the plunger rod 21.

[0046] The application sets the workbench 6 in the machine body 1, the workbench 6 is connected with the machine body 1 by the limiting fixing seat 7, the workbench 6 is installed and fixed the fixed mould 8 in the horizontal setting state, the horizontal degree of the fixed mould 8 can be effectively ensured, the fixed mould 8 is connected above the workbench 6 in a detachable mode, the pressing forming of different blanks can be realized by replacing the fixed mould 8, the oil pump motor 9 is matched with the oil pump assembly 10 to realize the circulation of oil suction and oil pressing of the hydraulic cylinder 5, the plunger in the hydraulic cylinder 5 is smoothly moved by combining the hydraulic system 3, the hydraulic efficiency is improved, the speed in the stamping process is avoided to be too fast, the hydraulic control of the hydraulic system 3 and the oil pump motor 9 is realized, when the real-time pressure value of the hydraulic gauge 13 is too high, the electric control system controls the oil pump motor 9 and the oil outlet electromagnetic valve 12, the stable release of the hydraulic energy of the upper cavity of the hydraulic cylinder 5 and the elastic deformation energy of the machine body part is realized, so that the hydraulic cylinder 5 is smoothly and effectively unloaded, the equipment is protected and the service life is prolonged, and the unloading noise is eliminated, the effect of fast downward, slow pressure increasing, product forming (stamping and shearing), pressure maintaining, pressure releasing and fast return is realized, the speed is adjustable, the stroke is adjustable, the pressure is adjustable, the action that the traditional punch cannot complete is solved, the fixed stroke, fixed pressure and pressure maintaining functions are realized, the deformation generated in the production process of the pressure increasing and flattening product is realized, and the flatness of the produced product is ensured.

[0047] Optionally, the machine body 1 comprises a base 23, the front end and the rear end of the base 23 are respectively connected with a front panel 24 and a rear panel 25, the two sides of the front panel 24 and the rear panel 25 are respectively connected with a stand 26, the limiting fixing seat 7 is fixedly connected with the corresponding front panel 24, rear panel 25 and stand 26, and the front panel 24, rear panel 25 and the connected stand 26 can improve the stability of the machine body, avoid the malignant distortion of part of the machine body 1, improve the service life of the machine body 1, the front panel 24 and the rear panel 25 are respectively connected with at least two groups of directional limiting plates 27, and the directional limiting plates 27 are connected with the hydraulic cylinder 5, the support plate 28 is connected around the hydraulic cylinder 5 between the front panel 24 and the rear panel 25, and the support plate 28 is connected between the hydraulic cylinder 5 through the directional limiting plate 27, the support plate 28, the front panel 24 and the rear panel 25 are connected around the hydraulic cylinder 5 through the directional limiting plate 27, the balance of the hydraulic cylinder 5 is realized, and the perpendicularity of the hydraulic cylinder 5 is ensured, the bottom of the workbench 6 is connected with a bottom plate 29, the bottom plate 29 is connected with a cylinder body support seat 30, the middle part of the cylinder body support seat 30 is fixedly connected with the hydraulic cylinder 5 corresponding to the workbench 6, the bottom plate 29 is connected with a first lower shaft sleeve 33 on both sides of the cylinder body support seat 30, the first lower shaft sleeve 33 is provided with a first positioning rod 31, one end of the first positioning rod 31 is fixedly connected with the bottom plate 29, the other end of the first positioning rod 31 is provided with a first upper shaft sleeve 32, one end of the first upper shaft sleeve 32 is connected with the machine body 1, at least two groups of second shaft sleeves 42 are connected between the upper part of the cylinder body support seat 30 and the machine body 1, the second shaft sleeve 42 is movably provided with a second positioning rod 43, and the second positioning rod 43 penetrates through the cylinder body support seat 30 and is connected with the fixed mold 8.

[0048] Through the above structure, the front panel 24, the rear panel 25 and the support plate 28 are arranged around the hydraulic cylinder 5 and connected with the hydraulic cylinder 5 through the directional limiting plate 27, combined with the first upper shaft sleeve 32, the first lower shaft sleeve 33, the first positioning rod 31, the second positioning rod 43 and the second shaft sleeve 42, the gantry type eight-way guide is adopted, and four groups of directional limiting plates 27 are additionally arranged in front and back and left and right to assist the oil cylinder for balancing the whole machine, so that the parallelism of the movable cross beam can be ensured under the premise that the product mold is seriously stressed unevenly in the whole machine during production, thereby ensuring the product quality and the service life of the mold, the perpendicularity of the hydraulic cylinder 5 can be ensured, and the side thrust of the hydraulic cylinder 5 can be borne under the eccentric load.

[0049] Optionally, the machine body 1 is provided with a hydraulic oil tank 34, the hydraulic oil tank 34 is communicated with a main oil inlet pipe 35, the main oil inlet pipe 35 is communicated with the oil pump assembly 10, and the hydraulic oil tank 34 provides oil liquid to the oil pump assembly 10 through the main oil inlet pipe 35.

[0050] Optionally, the workbench 6 comprises a die seat 36 and positioning plates 37 connected to both sides of the die seat 36, two ends of the positioning plates 37 are connected with corresponding limiting fixed seats 7 respectively, the upper part of the die seat 36 is connected with the two positioning plates 37 through a triangular support 38, the triangular support 38 and the positioning plates 37 can bear larger side thrust when the load is unbalanced, so as to ensure that the fuselage frame remains stable.

[0051] Optionally, the limiting fixed seat 7 comprises a connecting plate 39 and a plug-in plate 40, the plug-in plate 40 is in T-shaped structure, one end of the plug-in plate 40 is connected with the positioning plate 37, the other end of the plug-in plate 40 is connected with the connecting plate 39, the middle part of the plug-in plate 40 is plugged between the positioning plate 37 and the connecting plate 39, the limiting fixed seat 7 and the positioning plate 37 are connected to ensure the levelness of the fixed die 8.

[0052] Optionally, the cooling device 4 comprises a radiator 17, a cooling oil outlet pipe 16 and an oil tank inlet pipe 18 connected with the radiator 17, when the liquid is injected into the upper cavity or the lower cavity of the hydraulic cylinder 5, the temperature of the oil will rise due to excessive pressure or mechanical friction, the high temperature oil is output through the cooling oil outlet pipe 16, and after cooling, the oil is transported back to the oil tank through the oil tank inlet pipe 18, the machine body 1 is connected with a oil filter 41, the oil filter 41 is connected with the oil tank inlet pipe 18, the oil filter 41 can filter the liquid output by the hydraulic cylinder 5, the filtered liquid is transported to the hydraulic oil tank 34 through the oil tank inlet pipe 18, which can avoid that the used liquid with impurities returns to the oil tank, causing damage to the plunger and the inner wall of the hydraulic cylinder 5 when the liquid is used again.

[0053] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A CNC servo hydraulic punch press, characterized in that, Includes an organism and drive components, hydraulic system, cooling device and hydraulic cylinder connected to the organism; The machine body is equipped with a worktable, and each corner of the worktable is connected to a limit fixing seat, which is fixedly connected to the machine body through the limit fixing seat. A fixing mold is detachably connected to the worktable. The drive assembly includes an oil pump motor and an oil pump assembly connected to the oil pump motor. The oil pump motor is used to drive the oil pump assembly to circulate oil suction and pressure. The hydraulic system is located at the upper end of the machine body. The hydraulic system includes an inlet solenoid valve, an outlet solenoid valve, a hydraulic gauge, a plunger lifting inlet pipe, a plunger lowering inlet pipe, and a cooling outlet pipe. The plunger lifting inlet pipe and the plunger lowering inlet pipe are connected to the inlet solenoid valve, and the cooling outlet pipe is connected to the outlet solenoid valve. The cooling device is connected to the cooling oil outlet pipe; The hydraulic cylinder is connected to the plunger lifting inlet pipe and the plunger lowering inlet pipe, respectively.

2. The CNC servo hydraulic punch press according to claim 1, characterized in that, The body includes a base, with a front panel and a rear panel connected to the front and rear ends of the base, respectively. Columns are connected to both sides of the front panel and the rear panel, so that the limiting and fixing seat is fixedly connected to the corresponding front panel, rear panel, and column.

3. A CNC servo hydraulic punch press according to claim 2, characterized in that, The front panel and the rear panel are each connected to at least two sets of directional limiting plates, and hydraulic cylinders are connected through the directional limiting plates.

4. A CNC servo hydraulic punch press according to claim 3, characterized in that, A support plate is connected between the front panel and the rear panel around the hydraulic cylinder, and the support plate is connected to the hydraulic cylinder by a directional limiting plate.

5. A CNC servo hydraulic punch press according to claim 1, characterized in that, The bottom of the workbench is connected to a base plate, and a cylinder support seat is connected to the base plate. The hydraulic cylinder is fixedly connected to the middle of the cylinder support seat corresponding to the workbench. First lower bushings are connected to the base plate on both sides of the cylinder support seat. A first positioning rod is passed through each of the two first lower bushings. One end of the first positioning rod is fixedly connected to the base plate, and the other end of the first positioning rod is passed through a first upper bushing. One end of the first upper bushing is connected to the machine body. At least two sets of second bushings are connected between the upper part of the cylinder support seat and the machine body. A second positioning rod is movably passed through the second bushing. The second positioning rod passes through the cylinder support seat and is connected to the fixed mold.

6. A CNC servo hydraulic punch press according to claim 1, characterized in that, The machine body is equipped with a hydraulic oil tank, which is connected to a main oil inlet pipe, and the main oil inlet pipe is connected to an oil pump assembly.

7. A CNC servo hydraulic punch press according to claim 1, characterized in that, The workbench includes a mold base and positioning plates connected to both sides of the mold base. The two ends of the positioning plates are respectively connected to the corresponding limiting and fixing seats. The top of the mold base is connected to the two positioning plates through triangular supports.

8. A CNC servo hydraulic punch press according to claim 7, characterized in that, The limiting and fixing seat includes a connecting plate and a plug-in plate. The plug-in plate has a T-shaped structure. One end of the plug-in plate is connected to the positioning plate, and the other end of the plug-in plate is connected to the connecting plate.

9. A CNC servo hydraulic punch press according to claim 1, characterized in that, The cooling device includes a radiator, which is connected to an oil tank inlet pipe. The machine body is connected to an oil filter, which is connected to the oil tank inlet pipe.

10. A CNC servo hydraulic punch press according to claim 1, characterized in that, The hydraulic cylinder includes an outer fixed sleeve, a cylinder barrel, and a piston rod, and the outer fixed sleeve is fixedly connected to the machine body.

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