Servo press with lead screw surface cleaning and dust preventing mechanism

By designing a dust-proof mechanism for automatic cleaning and lubrication in the servo press, the problem of reduced production efficiency caused by dust in the screw surface area and high labor intensity of manual cleaning and lubrication is solved, automatic cleaning and lubrication are achieved, and production is improved efficiency.

CN119408222APending Publication Date: 2025-02-11BO LUO HE SHI MOLD MFG CO
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Patent Information

Application Number
CN202411856101.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-17
Publication Date
2025-02-11

AI Technical Summary

Technical Problem

During the long-term operation of existing servo presses, dust and particulate matter are easily accumulated on the surface of the screw, resulting in a decrease in production efficiency. Manual cleaning and lubrication require a lot of physical strength and time, especially in large equipment or difficult-to-reach locations. , labor intensity is relatively high.

Method used

A servo press with a screw surface cleaning and dustproof mechanism is designed. The mechanism is composed of electric slide rails, hydraulic rods, dust collecting sleeves, dust collecting cloth strips, lubricating sleeves, sponge blocks, oil outlets, oil tanks and corrugated pipes. Through the control of the hydraulic rod, the dust removal sleeve and lubrication sleeve are automatically cleaned and lubricated on the screw surface.

Benefits of technology

Automatic cleaning and lubrication of screw surfaces is achieved, reducing pollution introduced by manual operation, reducing labor intensity, improving production efficiency, and reducing the time required for cleaning and lubrication.

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Abstract

The invention relates to the technical field of servo presses, in particular to a servo press with a lead screw surface cleaning dustproof mechanism, which comprises a base, a control box, a driving component, a sliding component and a cleaning component, the driving component and the sliding component are used for driving the press to operate, the cleaning component is used for cleaning the interior of the sliding component, and the cleaning component is connected to one side of the interior of the control box. The control box is installed above the base, the driving component is connected to one side of the upper portion in the control box, the sliding component is connected to the lower portion of the driving component, and the cleaning component is composed of an electric sliding rail, a hydraulic rod, a connecting block, a second motor, a T-shaped rod, a dust removal sleeve, a dust removal cloth strip, a lubricating sleeve, a sponge block, an oil outlet, an oil tank and a corrugated pipe. The problems that in the prior art, more pollutants such as dust and sweat are easily introduced through manual operation, pollution to the lead screw is aggravated, manual cleaning and lubricating need much physical strength and time, and the labor intensity is large are solved.
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Description

Technical Field

[0001] The invention relates to the technical field of servo presses, in particular to a servo press with a screw surface cleaning and dust prevention mechanism. Background Art

[0002] The servo press is a high-precision, high-rigidity pressing equipment that uses a servo motor as a driving source. It adopts advanced servo drive technology and can achieve precise control and adjustment of pressure. It is widely used in forging, stamping, die-casting, stretching and other manufacturing fields. In my country, with the high-quality development of the manufacturing industry, the demand for servo presses is increasing. Servo presses are used for forging and forming metals in the forging industry. They can provide stable pressure and accurately control the forging force, thereby improving the precision and strength of the product. They are suitable for the manufacture of various mechanical parts and tools.

[0003] In the prior art, a common structure used in the operation of a press is a ball screw. When the ball screw is running for a long time, dust in the air and particulate matter in the production environment will be brought in by the rotation of the screw and accumulate on its surface. At this time, the production efficiency of the press will be affected. However, the general method of cleaning the outside of the screw is to stop the press, disassemble the machine shell, and then manually wrap a part of the outside of the screw with a rag and wipe it from top to bottom. Repeat the operation several times to ensure that the outside of the screw remains clean, and then use a brush to dip a little lubricating oil on the outside of the screw to form a protective film on the outside of the screw, which reduces the adhesion of dust to a certain extent. However, manual operation is likely to introduce more pollutants, such as dust, sweat, etc., which in turn aggravate the pollution of the screw. Manual cleaning and lubrication require more physical strength and time, especially in large equipment or difficult-to-reach locations, and the labor intensity is relatively high. Summary of the invention

[0004] The object of the present invention is to provide a servo press with a screw surface cleaning and dust prevention mechanism to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A servo press with a screw surface cleaning and dust prevention mechanism, comprising a base and a control box, and also comprising a driving component and a sliding component for driving the press to operate, and a cleaning component for cleaning the inside of the sliding component, wherein the cleaning component is connected to one side of the inside of the control box, the control box is installed above the base, the driving component is connected to one side of the inside of the control box, the sliding component is connected to the bottom of the driving component, the cleaning component is composed of an electric slide rail, a hydraulic rod, a connecting block, a second motor, a T-bar, a dust removal sleeve, a dust removal cloth strip, a lubricating sleeve, a sponge block, an oil outlet, an oil tank and a bellows, the electric slide rail is arranged on one side of the inside of the control box, the hydraulic rod is slidably connected to the electric slide Inside the rail, the extension end of the hydraulic rod is connected to the connection block, the second motor is connected to the top of the connection block, the output end of the second motor is connected to a T-bar, one side of the dust removal sleeve is connected to one end of the T-bar, the dust removal cloth strip is arranged on the inner wall of the dust removal sleeve, one side of the lubricating sleeve is connected to the other end of the T-bar, the inner wall of the lubricating sleeve is connected to a sponge block, the sponge block is provided with a plurality of oil outlets of the same size and equal spacing, each of the oil outlets is connected to a bellows, one end of the bellows is connected to the oil tank, wherein the other side of the dust removal sleeve and the lubricating sleeve are provided with an arc-shaped notch opened outward, wherein the dust removal sleeve and the lubricating sleeve are the same in size and shape. The problem that manual operation in the prior art easily introduces more pollutants, such as dust, sweat, etc., but aggravates the pollution of the lead screw, and manual cleaning and lubrication require more physical strength and time, especially in large equipment or difficult-to-reach locations, resulting in a high labor intensity.

[0007] Preferably, the driving component is composed of a fixed block, a first motor, a driving wheel, a belt, and a synchronous wheel. The driving component is one of the main power components of the integral press.

[0008] Preferably, the fixing block is connected to one side of the upper part of the control box, the first motor is connected to the inside of the fixing block, the driving wheel is connected to the output end of the first motor, the belt is arranged outside the driving wheel, the synchronous wheel is connected to the belt transmission, and the synchronous wheel and the driving wheel have the same size. When the first motor is started, the driving wheel starts to rotate, and the external belt and synchronous wheel also rotate accordingly, and the electrical energy is converted into mechanical energy to provide the required rotational force.

[0009] Preferably, the sliding component is composed of a housing, a ball screw, a nut, a piston, a limit groove and a limit rod. A sliding groove is provided on one side of the housing, and the width of the groove is adapted to the size of the dust cover and the lubricating cover. The driving component is connected to the sliding component. When the driving component is in operation, the sliding component is driven to operate accordingly. The moving speed of the piston in the sliding component can be accurately controlled. Different materials and products require different pressing speeds, which ensures the quality of the product.

[0010] Preferably, one end of the ball screw is connected to the center of the synchronous wheel, and the nut is slidably and threadedly connected to the outside of the ball screw, so as to convert the rotational motion of the first motor into linear motion so as to push the nut to move up and down.

[0011] Preferably, the piston is connected to the outside of the nut, and the two sides of the piston are provided with limit grooves of the same size and depth, and the two sides of the interior of the housing are connected with limit rods, and the limit rods are adapted to the size of the limit grooves, wherein the limit rods slide inside the limit grooves. When the nut moves linearly along the ball screw, the piston connected to the nut slides on the limit rods through the limit grooves on both sides, so that the piston and the nut reciprocate along the rotation direction of the screw.

[0012] Preferably, a pressure head is connected to the bottom of the piston, and a sealing ring is connected to the bottom of the housing, and the inner diameter of the sealing ring is adapted to the diameter of the piston. The pressure head is used to directly apply pressure to the material. It transfers the pressure to the material by contacting with the mold, causing it to undergo plastic deformation, thereby forming the shape of the desired product. The sealing ring can prevent the hydraulic oil from leaking from the bottom of the housing.

[0013] Preferably, a slider is connected to one side of the piston, the slider is connected to a reading head, a grating scale is connected to one side of the shell, the reading head slides on the grating scale following the piston, the grating scale is parallel to the shell and is firmly fixed, the reading head will start to read the grating pattern on the grating scale and transmit the position information to the control system.

[0014] Preferably, a flap is connected to one side above the control box, and an oil tank is arranged below the flap, so that it is convenient to add lubricating oil into the oil tank by opening the flap.

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

[0016] In the present invention, the hydraulic rod controls the connecting block to extend in the direction of the sliding component, and one end of the ball screw slides into the interior of the dust sleeve through the arc-shaped notch of the dust sleeve, and the dust removal cloth strip connected to the inner wall of the dust sleeve fits the outer surface of the ball screw. With the operation of the electric slide rail, the dust sleeve makes linear motion in the vertical direction, and the dust on the surface of the screw is wiped during the motion. After cleaning, the ball screw needs to be lubricated. At this time, the extended end of the hydraulic rod is retracted, and the second motor controls the T-bar to rotate so that the notch of the lubricating sleeve is aligned with the screw, and then the hydraulic rod is extended again so that the lubricating sleeve is engaged with the screw, and the sponge block fits the outer surface of the screw. During the sliding process of the hydraulic rod controlled by the electric slide rail, the sponge block achieves the lubrication effect on the outer surface of the ball screw. The problem that manual operation in the prior art easily introduces more pollutants, such as dust, sweat, etc., but aggravates the pollution of the screw, and manual cleaning and lubrication require more physical strength and time, especially in large equipment or difficult-to-reach locations, resulting in a high labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the overall press in the present invention;

[0018] Figure 2 It is a schematic diagram of the first internal structure of the integral press in the present invention;

[0019] Figure 3 It is a schematic diagram of the second internal structure of the integral press in the present invention;

[0020] Figure 4 for Figure 3 The enlarged schematic diagram at A in the middle;

[0021] Figure 5 It is a schematic diagram of the structure of the cleaning component in the present invention;

[0022] Figure 6 It is a schematic diagram of the structure of the driving component and the sliding component in the present invention;

[0023] Figure 7 for Figure 6 The enlarged schematic diagram of point B in the middle;

[0024] Figure 8 It is a schematic diagram of the first internal structure of the driving component and the sliding component in the present invention;

[0025] Fig. 9 It is a schematic diagram of the second internal structure of the driving component and the sliding component in the present invention.

[0026] In the figure: base 1, control box 2, flip cover 3, oil tank 4, driving component 5, fixed block 51, first motor 52, synchronous wheel 53, belt 54, driving wheel 55, sliding component 6, housing 61, ball screw 62, nut 63, piston 64, limit groove 65, limit rod 66, grating ruler 67, slider 68, reading head 69, second motor 7, dust removal sleeve 8, T-bar 9, bellows 10, lubrication sleeve 11, hydraulic rod 12, electric slide rail 13, connecting block 14, oil outlet 15, dust removal cloth strip 16, sponge block 17, cleaning component 18, sealing ring 19, pressure head 20. DETAILED DESCRIPTION

[0027] In order to make the technical means, objectives and effects of the present invention easy to understand, the embodiments of the present invention are described in detail below with reference to specific drawings.

[0028] It should be noted that all the terms used in the present invention for directional and positional indications, such as "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "low", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection status between the components in a certain state (as shown in the accompanying drawings), and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0031] In conjunction with the following drawings, the present invention provides a technical solution: a servo press with a screw surface cleaning and dust prevention mechanism, comprising a base 1 and a control box 2, and also comprising a driving component 5 and a sliding component 6 for driving the press to operate, and a cleaning component 18 for cleaning the inside of the sliding component 6, wherein the cleaning component 18 is connected to one side of the inside of the control box 2, the control box 2 is installed above the base 1, the driving component 5 is connected to one side of the inside of the control box 2 above, the sliding component 6 is connected to the bottom of the driving component 5, the cleaning component 18 is composed of an electric slide rail 13, a hydraulic rod 12, a connecting block 14, a second motor 7, a T-bar 9, a dust removal sleeve 8, a dust removal cloth strip 16, a lubricating sleeve 11, a sponge block 17, an oil outlet 15, an oil tank 4 and a bellows 10, the electric slide rail 13 is arranged on one side of the inside of the control box 2, the hydraulic rod 12, a connecting block 14, a second motor 7, a T-bar 9, a dust removal sleeve 8, a dust removal cloth strip 16, a lubricating sleeve 11, a sponge block 17, an oil outlet 15, an oil tank 4 and a bellows 10 The rod 12 is slidably connected to the inside of the electric slide rail 13, the extended end of the hydraulic rod 12 is connected to the connecting block 14, the second motor 7 is connected to the top of the connecting block 14, the output end of the second motor 7 is connected to the T-bar 9, one side of the dust removal sleeve 8 is connected to one end of the T-bar 9, the dust removal cloth strip 16 is arranged on the inner wall of the dust removal sleeve 8, one side of the lubricating sleeve 11 is connected to the other end of the T-bar 9, the inner wall of the lubricating sleeve 11 is connected to a sponge block 17, and the sponge block 17 is provided with a plurality of oil outlets 15 of the same size and equal spacing, each of the oil outlets 15 is connected to the bellows 10, one end of the bellows 10 is connected to the oil tank 4, wherein the other sides of the dust removal sleeve 8 and the lubricating sleeve 11 are provided with an arc-shaped notch opened outward, wherein the dust removal sleeve 8 and the lubricating sleeve 11 are the same in size and shape.

[0032] When using, refer to the attached Figure 2As shown, the hydraulic rod 12 controls the connecting block 14 to extend in the direction of the sliding component 6, and one end of the ball screw 62 slides into the interior of the dust sleeve 8 through the arc-shaped notch of the dust sleeve 8. The dust-removing cloth strip 16 connected to the inner wall of the dust sleeve 8 fits the outer surface of the ball screw 62. With the operation of the electric slide rail 13, the dust sleeve 8 makes linear motion in the vertical direction, and the dust on the surface of the screw is wiped during the movement. Since the surface of the cloth strip is concave and convex, the cloth strip can take care of the thread groove of the screw when cleaning, achieving a cleaner effect. The cleaning is completed. After that, the ball screw 62 needs to be lubricated. At this time, the extended end of the hydraulic rod 12 is retracted, and the second motor 7 controls the T-bar to rotate so that the notch of the lubricating sleeve 11 is aligned with the screw. Then the hydraulic rod 12 is extended again so that the lubricating sleeve 11 is engaged with the screw. The lubricating oil reaches the oil outlet 15 through the bellows 10, and the sponge block 17 in the lubricating sleeve 11 is soaked. The sponge block 17 fits the outer surface of the screw. During the process of the electric slide rail 13 controlling the hydraulic rod 12 to slide, the sponge block 17 achieves the lubrication effect on the outer surface of the ball screw 62. The problem that manual operation in the prior art easily introduces more pollutants, such as dust, sweat, etc., but aggravates the pollution of the screw, and manual cleaning and lubrication require more physical strength and time, especially in large equipment or difficult-to-reach locations, resulting in a high labor intensity.

[0033] In a further preferred embodiment, the driving component 5 is composed of a fixed block 51 , a first motor 52 , a driving wheel 55 , a belt 54 , and a synchronous wheel 53 .

[0034] In the present application, the driving component 5 is one of the main power components of the overall press, providing stable power output, ensuring that the press can operate stably for a long time, and ensuring that the press can complete various pressing and forming tasks efficiently and stably.

[0035] In a further preferred embodiment, the fixed block 51 is connected to one side above the inside of the control box 2, the first motor 52 is connected to the inside of the fixed block 51, the driving wheel 55 is connected to the output end of the first motor 52, the belt 54 is arranged on the outside of the driving wheel 55, the synchronous wheel 53 is transmission-connected to the belt 54, and the synchronous wheel 53 and the driving wheel 55 are the same size.

[0036] In the present application, when the first motor 52 is started, the driving wheel 55 starts to rotate, and then the external belt 54 and the synchronous wheel 53 also rotate accordingly, and the electrical energy is converted into mechanical energy to provide the required rotational force. The belt 54 and the synchronous wheel 53 have an accurate transmission ratio, which can ensure that the power is accurately transmitted to the required position, reduce slippage, and improve transmission efficiency.

[0037] In a further preferred embodiment, the sliding component 6 is composed of a shell 61, a ball screw 62, a nut 63, a piston 64, a limit groove 65 and a limit rod 66. A sliding groove is provided on one side of the shell 61, and the width of the groove is adapted to the size of the dust removal sleeve 8 and the lubrication sleeve 11.

[0038] In the present application, the driving component 5 and the sliding component 6 are connected. When the driving component 5 operates, the sliding component 6 is driven to operate accordingly. The moving speed of the piston 64 in the sliding component 6 can be precisely controlled. Different materials and products require different pressing speeds, thereby ensuring the quality of the product.

[0039] In a further preferred embodiment, one end of the ball screw 62 is connected to the center of the synchronous wheel 53 , and the nut 63 is slidably and threadedly connected to the outside of the ball screw 62 .

[0040] In the present application, when the first motor 52 is started, the ball screw 62 rotates accordingly. Since the nut 63 is threadedly connected to the ball screw 62, when the ball screw 62 and the nut 63 are combined together, precise linear motion and torque transmission can be achieved. The rotation of the ball screw 62 is converted into linear displacement through the nut 63, so that the length of the linear displacement can be accurately controlled by the rotation angle.

[0041] In a further preferred embodiment, the piston 64 is connected to the outside of the nut 63, and limiting grooves 65 of the same size and depth are provided on both sides of the piston 64. Limiting rods 66 are connected to both sides of the inside of the shell 61, and the limiting rods 66 are adapted to the size of the limiting grooves 65, wherein the limiting rods 66 slide inside the limiting grooves 65.

[0042] In the present application, when the nut 63 makes linear motion along the ball screw 62, the piston 64 connected to the nut 63 slides on the limiting rod 66 through the limiting grooves 65 on both sides, so that the piston 64 and the nut 63 make reciprocating motion along the rotation direction of the screw. When the limiting rod 66 slides in the limiting groove 65, the piston 64 is kept making linear motion in the vertical direction.

[0043] In a further preferred embodiment, a pressure head 20 is connected below the piston 64 , and a sealing ring 19 is connected below the housing 61 . The inner diameter of the sealing ring 19 is adapted to the diameter of the piston 64 .

[0044] In the present application, the pressure head 20 is a part used to directly apply pressure to the material. It transfers the pressure to the material by contacting with the mold, causing it to undergo plastic deformation, thereby forming the shape of the desired product. The sealing ring 19 can prevent the hydraulic oil from leaking from the bottom of the housing 61.

[0045] In a further preferred embodiment, a slider 68 is connected to one side of the piston 64 , and the slider 68 is connected to a reading head 69 . A grating ruler 67 is connected to one side of the housing 61 , and the reading head 69 slides on the grating ruler 67 following the piston 64 .

[0046] In the present application, when the reading head 69 follows the piston 64 to slide, the reading head 69 fits the grating scale 67 and performs linear motion. The data of the grating scale is used to control the movement of the press to ensure that the workpiece can achieve precise displacement and speed in each round of processing.

[0047] In a further preferred embodiment, a flap 3 is connected to one side above the control box 2 , and an oil tank 4 is disposed below the flap 3 .

[0048] In the present application, since the oil tank 4 is filled with lubricating oil for lubricating the lead screw, after the lubricating oil is exhausted, the flip cover 3 is directly opened and new lubricating oil is poured into the oil tank 4 .

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A servo press with a screw surface cleaning and dust prevention mechanism, comprising a base (1) and a control box (2), characterized in that: It also includes a driving component (5) and a sliding component (6) for driving the press to operate; and a cleaning component (18) for cleaning the interior of the sliding component (6), wherein the cleaning component (18) is connected to one side of the interior of the control box (2), the control box (2) is installed above the base (1), the driving component (5) is connected to one side of the interior of the control box (2), and the sliding component (6) is connected to the bottom of the driving component (5).

2. A servo press with a screw surface cleaning and dust prevention mechanism according to claim 1, characterized in that: The driving component (5) is composed of a fixed block (51), a first motor (52), a driving wheel (55), a belt (54), and a synchronous wheel (53); The fixing block (51) is connected to one side of the upper part of the control box (2); the first motor (52) is connected to the inside of the fixing block (51); the driving wheel (55) is connected to the output end of the first motor (52); the belt (54) is arranged outside the driving wheel (55); the synchronous wheel (53) is connected to the belt (54) in a transmission manner; and the synchronous wheel (53) and the driving wheel (55) are of the same size.

3. A servo press with a screw surface cleaning and dust prevention mechanism according to claim 2, characterized in that: The cleaning component (18) is composed of an electric slide rail (13), a hydraulic rod (12), a connecting block (14), a second motor (7), a T-shaped rod (9), a dust removal sleeve (8), a dust removal cloth strip (16), a lubricating sleeve (11), a sponge block (17), an oil outlet (15), an oil tank (4) and a bellows (10); The electric slide rail (13) is arranged on one side inside the control box (2), the hydraulic rod (12) is slidably connected to the inside of the electric slide rail (13), the extended end of the hydraulic rod (12) is connected to the connecting block (14), and the second motor (7) is connected to the top of the connecting block (14); The output end of the second motor (7) is connected to a T-shaped rod (9), one side of the dust removal sleeve (8) is connected to one end of the T-shaped rod (9), the dust removal cloth strip (16) is arranged on the inner wall of the dust removal sleeve (8), one side of the lubricating sleeve (11) is connected to the other end of the T-shaped rod (9), the inner wall of the lubricating sleeve (11) is connected to a sponge block (17), and the interior of the sponge block (17) is provided with a plurality of oil outlets (15) of the same size and equal spacing, each of the oil outlets (15) is connected to a bellows (10), one end of the bellows (10) is connected to an oil tank (4), wherein the other sides of the dust removal sleeve (8) and the lubricating sleeve (11) are both provided with an arc-shaped notch opened outward, wherein the dust removal sleeve (8) and the lubricating sleeve (11) are of the same size and shape.

4. A servo press with a screw surface cleaning and dust prevention mechanism according to claim 3, characterized in that: The sliding component (6) is composed of a housing (61), a ball screw (62), a nut (63), a piston (64), a limiting groove (65) and a limiting rod (66). A sliding groove is provided on one side of the housing (61), and the width of the groove is adapted to the size of the dust removal sleeve (8) and the lubrication sleeve (11).

5. A servo press with a screw surface cleaning and dust prevention mechanism according to claim 4, characterized in that: One end of the ball screw (62) is connected to the center of the synchronous wheel (53), and the nut (63) is slidably and threadedly connected to the outside of the ball screw (62).

6. A servo press with a screw surface cleaning and dust prevention mechanism according to claim 5, characterized in that: The piston (64) is connected to the outside of the nut (63), and limiting grooves (65) of the same size and depth are arranged on both sides of the piston (64). Limiting rods (66) are connected to both sides of the inside of the shell (61), and the size of the limiting rods (66) is adapted to the size of the limiting grooves (65), wherein the limiting rods (66) slide inside the limiting grooves (65).

7. A servo press with a screw surface cleaning and dust prevention mechanism according to claim 6, characterized in that: A pressure head (20) is connected below the piston (64), and a sealing ring (19) is connected below the housing (61). The inner diameter of the sealing ring (19) is adapted to the diameter of the piston (64).

8. A servo press with a screw surface cleaning and dust prevention mechanism according to claim 7, characterized in that: A slider (68) is connected to one side of the piston (64), and the slider (68) is connected to a reading head (69). A grating ruler (67) is connected to one side of the housing (61), and the reading head (69) follows the piston (64) to slide on the grating ruler (67).

9. A servo press with a screw surface cleaning and dust prevention mechanism according to claim 1, characterized in that: A flap (3) is connected to one side above the control box (2), and an oil tank (4) is arranged below the flap (3).