Metal surface polishing device

Abstract

The present invention relates to the technical field of surface treatment equipment, and more specifically, to a metal surface polishing device, comprising a frame, a support unit, a drive unit, a polishing unit, and a polishing control unit; the frame is connected to two support units relative to each other; each support unit is equipped with a drive unit and a polishing control unit; each drive unit is connected to two polishing units in a transmission manner; the two polishing units are connected to the polishing control unit so as to move toward or away from each other at both ends of the drive unit under the drive of the polishing control unit. A compression spring is provided inside the support unit so that when the inner polishing wheel polishes the metal surface, there is a certain elastic buffer space, so that the inner polishing wheel can adjust its movement appropriately according to the flatness of the metal surface, thereby preventing the problem of over-polishing of protrusions on the metal surface or the unpolishing of the surface below the protrusion, which is beneficial to improving the quality of the processed metal products.

Description

Technical Field

[0001] The present invention relates to the technical field of surface treatment equipment, and more particularly to a metal surface polishing and grinding device. Background Art

[0002] During the processing of metal products, their surfaces often need to be ground and polished to improve their surface gloss. This is especially true for products made of metal materials such as stainless steel and cast iron. Before the final molding or before steps such as surface coating, most metal products need to be polished.

[0003] When the multi-station polishing machine in the prior art is in use, there is a problem that the position of the polishing mechanism is fixed and it cannot perform appropriate displacement movement according to the flatness of the metal surface. It is only suitable for polishing metal surfaces with relatively good surface flatness. When the flatness of the metal surface is relatively poor, the polishing mechanism cannot perform appropriate adjustment movement according to the flatness of the metal surface, resulting in the problem that the protrusions on the metal surface are over-polished, while the surface below the protrusions is not polished, affecting the processing quality of the metal products. Summary of the Invention

[0004] The purpose of the present invention is to provide a metal surface polishing device that can effectively solve the problems in the prior art.

[0005] The present invention provides a metal surface polishing device, which includes a frame, a support unit, a drive unit, a polishing unit and a polishing control unit; two support units are relatively connected to the frame; each of the support units is equipped with a drive unit and a polishing control unit; each of the drive units is connected to two polishing units in a transmission manner; the two polishing units are both connected to the polishing control unit so as to move toward or away from each other at both ends of the drive unit under the drive of the polishing control unit.

[0006] Optionally, the frame includes a frame body and a bidirectional screw rotatably connected to the bottom of the frame body; a central slide is provided in the middle of the frame body for sliding engagement with two support units; the two support units are threadedly engaged with the two ends of the bidirectional screw; and the outer end of the bidirectional screw is connected to an adjusting wheel or an adjusting motor.

[0007] Optionally, the support unit includes an outer slide, a transverse axis, an inner slide, a compression spring and a bracket; the outer slide slides in the central slide of the frame and is threadedly engaged with the bidirectional screw; an inner slide is provided on the inner side of the outer slide, and the inner slide slides on two transverse axes, which are fixed side by side on the outer slide, and the axes of the transverse axes are perpendicular to the bidirectional screw; a compression spring is sleeved on the transverse axis, and the two ends of the compression spring are respectively fixed to the outer side surface of the inner slide and the outer side plate of the outer slide; the bracket is fixed on the inner slide, and the drive unit is mounted on the bracket.

[0008] Optionally, the inner side plate of the outer sliding seat is threadedly fitted with an elastic force adjustment screw, and the outer end of the elastic force adjustment screw presses against the inner sliding seat.

[0009] Optionally, the driving unit includes a double-output shaft motor fixed on the bracket; the output shafts at both ends of the double-output shaft motor are respectively connected to a driving worm through a coupling, and the two driving worms are connected to the two polishing units in a one-to-one transmission manner.

[0010] Optionally, the polishing unit includes an external polishing wheel, a sliding ring and an outer wheel frame; the external polishing wheel is slidably fitted on the outer end of the driving worm, and the driving worm is provided with a guide groove, and the guide groove is slidably fitted with a guide ridge fixed in the sliding hole of the external polishing wheel; one end of the sliding ring rotates in the annular groove on the inner end face of the external polishing wheel, and the other end of the sliding ring rotates on the outer wheel frame; the outer wheel frame is connected to the polishing control unit.

[0011] Optionally, the polishing and controlling unit includes a controlling motor, a controlling screw, a controlling slide and a controlling connecting rod; the controlling motor is fixed in the central cavity of the bracket, the output shaft of the controlling motor is connected to the controlling screw for transmission, the middle thread of the controlling screw is connected to the controlling slide sliding in the longitudinal slide of the bracket, the two ends of the controlling slide are respectively connected to one end of a controlling connecting rod for rotation, and the other ends of the two controlling connecting rods are connected to the outer wheel frames of the two polishing units one by one for rotation.

[0012] Optionally, the polishing unit also includes an inner polishing wheel, an inner wheel frame, a manual adjustment rod, a transmission worm gear and a rotating shaft; the inner wheel frame is slidingly fitted on the driving worm, the inner wheel frame thread is fitted on the outer thread surface of the manual adjustment rod, and the outer end of the manual adjustment rod rotates on the inner side surface of the sliding ring; the rotating shaft rotates on the inner wheel frame, the transmission worm gear is fixed in the middle of the rotating shaft, and the transmission worm gear is engaged with the driving worm; an inner polishing wheel is fixed at each end of the rotating shaft; an angle adjustment worm gear is fixed on the outer ring surface of the sliding ring, and the angle adjustment worm gear is engaged with the angle adjustment worm rotating on the outer wheel frame.

[0013] Optionally, the inner wheel frame is threaded with a locking bolt, and the inner end of the locking bolt is tightened on the manual adjustment rod.

[0014] Optionally, the axis of the rotating shaft is perpendicular to the axis of the driving worm; the axis of the manual adjustment rod is parallel to the axis of the driving worm.

[0015] The embodiments of the present invention bring the following beneficial effects:

[0016] The present invention provides a metal surface polishing device, in which a compression spring is provided inside a support unit, so that when an inner polishing wheel polishes the metal surface, there is a certain elastic buffer space, so that the inner polishing wheel can be appropriately adjusted and moved according to the flatness of the metal surface, thereby preventing the problem of excessive polishing of the raised parts of the metal surface or the surface below the raised parts from being left unpolished, which is beneficial to improving the quality of the processed metal products.

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 The overall schematic diagram provided for the embodiment of the present invention Figure 1 ;

[0020] Figure 2 The overall schematic diagram provided for the embodiment of the present invention Figure 2 ;

[0021] Figure 3 A schematic diagram of the structure of a rack provided in an embodiment of the present invention;

[0022] Figure 4 A schematic structural diagram of a support unit provided in an embodiment of the present invention;

[0023] Figure 5 A schematic structural diagram of a drive unit provided in an embodiment of the present invention;

[0024] Figure 6 Schematic diagram of the connection structure between the polishing unit and the driving worm provided in the embodiment of the present invention Figure 1 ;

[0025] Figure 7 Schematic diagram of the connection structure between the polishing unit and the driving worm provided in the embodiment of the present invention Figure 2 ;

[0026] Figure 8 This is a schematic structural diagram of a polishing control unit provided in an embodiment of the present invention.

[0027] Icons: frame 1; frame body 11; bidirectional screw 12; support unit 2; outer slide 21; horizontal axis 22; inner slide 23; compression spring 24; bracket 25; elastic force adjustment screw 26; drive unit 3; double-output shaft motor 31; drive worm 32; polishing unit 4; outer polishing wheel 41; sliding ring 42; outer wheel frame 43; inner polishing wheel 44; inner wheel frame 45; manual adjustment lever 46; transmission worm gear 47; rotating shaft 48; angle adjustment worm 49; polishing control unit 5; control motor 51; control screw 52; control slide 53; control connecting rod 54. DETAILED DESCRIPTION

[0028] In order to help those skilled in the art better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0029] It should be noted that when an element is referred to as being “fixed on” or “set on” another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0032] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for implementation of this application. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportion relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of this application. Changes or adjustments in their relative relationships should also be considered as the scope of implementation of this application without substantially changing the technical content.

[0033] The following is combined with Figure 1-8 The present invention is described in further detail.

[0034] Example 1

[0035] like Figure 1-8 As shown, a metal surface polishing device includes a frame 1, a support unit 2, a drive unit 3, a polishing unit 4 and a polishing control unit 5; two support units 2 are relatively connected to the frame 1; each of the support units 2 is equipped with a drive unit 3 and a polishing control unit 5; each of the drive units 3 is transmission-connected to two polishing units 4; the two polishing units 4 are both connected to the polishing control unit 5 so as to move toward or away from each other at the two ends of the drive unit 3 under the drive of the polishing control unit 5.

[0036] The metal surface polishing device is described. When in use, each of the driving units 3 can be driven to connect to the two polishing units 4 after being started, and the metal surface can be polished by the polishing units 4. The metal to be polished can be supported and fixed by a clamp installed on the frame 1, and then the height of the metal to be polished can be adjusted by adjusting the height of the clamp so that the position to be polished contacts the polishing unit 4. After the polishing unit 4 is started, the metal surface to be polished can be polished by the polishing unit 4. The present invention is a multi-station polishing device, which can simultaneously perform synchronous polishing on both sides of the metal to be polished by the four polishing units 4 on the two support units 2, and the distance between the two polishing units 4 on each support unit 2 can also be adjusted by the polishing control unit 5. The polishing control unit 5 controls the horizontal movement of the two polishing units 4, thereby controlling the two polishing units 4 to perform horizontal movement polishing, thereby improving the polishing speed of the metal surface, and there is no need to always adjust the position of the metal.

[0037] Example 2

[0038] like Figure 1-8As shown, the frame 1 includes a frame body 11 and a bidirectional screw 12 rotatably connected to the bottom of the frame body 11; a central slide is provided in the middle of the frame body 11 for sliding cooperation with two support units 2; the two support units 2 are threadedly engaged at both ends of the bidirectional screw 12; the outer end of the bidirectional screw 12 is connected to an adjusting wheel or an adjusting motor.

[0039] One end of the bidirectional screw 12 is a left-hand thread and the other end is a right-hand thread. When the bidirectional screw 12 is rotated, its contact position with the two support units 2 can be changed, thereby driving and controlling the two support units 2 to move toward or away from each other on the central slide of the frame 11, so that the distance between the two support units 2 can be adjusted, so that the four polishing units 4 on the two support units 2 are grouped in twos to polish the two side surfaces of the metal; the four polishing units 4 can also be used as four separate polishing devices, multi-station polishing, and increased polishing speed; the bidirectional screw 12 can be rotated under the control of the adjusting wheel or the adjusting motor, and the operation is convenient.

[0040] Example 3

[0041] like Figure 1-8 As shown, the support unit 2 includes an outer slide 21, a transverse axis 22, an inner slide 23, a compression spring 24 and a bracket 25; the outer slide 21 slides in the central slide of the frame 11 and is threadedly engaged with the bidirectional screw 12; an inner slide 23 is provided on the inner side of the outer slide 21, and the inner slide 23 slides on two transverse axes 22, and the two transverse axes 22 are fixed side by side on the outer slide 21, and the axis of the transverse axis 22 is perpendicular to the bidirectional screw 12; a compression spring 24 is sleeved on the transverse axis 22, and the two ends of the compression spring 24 are respectively fixed to the outer side surface of the inner slide 23 and the outer side plate of the outer slide 21; the bracket 25 is fixed on the inner slide 23, and the drive unit 3 is mounted on the bracket 25.

[0042] In a metal surface polishing device of the present invention, a compression spring 24 is provided inside the support unit 2, so that the polishing unit 4 has a certain elastic buffer space when polishing the metal surface. When the polishing unit 4 contacts the metal surface located between the two support units 2, if there are uneven positions on the metal surface, different pressures are generated on the polishing unit 4. At this time, the polishing unit 4 can drive the bracket 25 to slide on the horizontal axis 22 and generate different amplitudes of compression on the compression spring 24. The compression spring 24 allows the polishing unit 4 to always remain in contact with the metal surface and can move with the uneven position. The polishing unit 4 adjusts its movement appropriately according to the flatness of the metal surface to prevent the protrusions on the metal surface from being over-polished or the surface below the protrusion from being unpolished, which is beneficial to improving the quality of the processed metal products. It should be noted that during polishing, the metal needs to be placed between the two support units 2.

[0043] The inner plate of the outer slide 21 is threaded with a spring-loaded adjustment screw 26, the outer end of which presses against the inner slide 23. The initial compression range of the compression spring 24 can be adjusted to accommodate different polishing treatments for different metal surfaces. Adjustment is achieved by rotating the spring-loaded adjustment screw 26 to change the contact position between the spring-loaded adjustment screw 26 and the inner plate of the outer slide 21, thereby adjusting the compression range of the compression spring 24 when the spring-loaded adjustment screw 26 presses against the inner slide 23. This is a very convenient operation.

[0044] Example 4

[0045] like Figure 1-8 As shown, the driving unit 3 includes a double-output shaft motor 31 fixed on the bracket 25; the output shafts at both ends of the double-output shaft motor 31 are respectively connected to a driving worm 32 through a coupling, and the two driving worms 32 are connected to the two polishing units 4 one by one.

[0046] After the dual-output shaft motor 31 is started, it can drive the two driving worms 32 to rotate, thereby driving the two polishing units 4 connected thereto to perform polishing work through the two driving worms 32 .

[0047] The polishing unit 4 includes an outer polishing wheel 41, a sliding ring 42 and an outer wheel frame 43; the outer polishing wheel 41 is slidably fitted on the outer end of the driving worm 32, and the driving worm 32 is provided with a guide groove, which is slidably fitted with a guide ridge fixed in the sliding hole of the outer polishing wheel 41; one end of the sliding ring 42 rotates in the annular groove on the inner end surface of the outer polishing wheel 41, and the other end of the sliding ring 42 rotates on the outer wheel frame 43; the outer wheel frame 43 is connected to the polishing control unit 5.

[0048] When the driving worm 32 rotates, the outer polishing wheel 41 can be driven to rotate by the cooperation of the guide groove and the guide ridge, so that the outer polishing wheel 41 is used for polishing. The outer polishing wheel 41 is slidably fitted on the outer end of the driving worm 32. The driving worm 32 is provided with a guide groove. The guide groove and the guide ridge fixed in the sliding hole of the outer polishing wheel 41 are slidably fitted, so that the position of the outer polishing wheel 41 can be adjusted; when adjusting, the polishing control unit 5 is started, and the polishing control unit 5 controls the outer wheel frame 43 to move horizontally. The outer wheel frame 43 drives the sliding ring 42 and the outer polishing wheel 41 to move horizontally, so that the outer polishing wheel 41 slides on the driving worm 32 without affecting the transmission movement of the driving worm 32 to the outer polishing wheel 41, so as to perform polishing on different positions of the metal surface.

[0049] Example 5

[0050] like Figure 1-8As shown, the polishing and grinding control unit 5 includes a control motor 51, a control screw 52, ​​a control slide 53 and a control connecting rod 54; the control motor 51 is fixed in the central cavity of the bracket 25, and the output shaft of the control motor 51 is connected to the control screw 52 in a transmission manner. The middle part of the control screw 52 is threadedly connected to the control slide 53 sliding in the longitudinal slide of the bracket 25, and the two ends of the control slide 53 are respectively rotatably connected to one end of a control connecting rod 54, and the other ends of the two control connecting rods 54 are rotatably connected to the outer wheel frames 43 of the two polishing units 4 one by one.

[0051] After the regulating motor 51 is started, it can drive the regulating screw 52 to rotate. When the regulating screw 52 rotates, it can change the contact position between it and the regulating slide 53, thereby driving and controlling the regulating slide 53 to slide in the longitudinal slide of the bracket 25. When the regulating slide 53 slides in the up and down directions, it can change the angle between it and the two regulating links 54, thereby driving the outer wheel frames 43 of the two polishing units 4 to move toward or away from each other through the two regulating links 54, and finally mobilizing the outer polishing wheels 41 of the two polishing units 4 to move.

[0052] Example 6

[0053] like Figure 1-8 As shown, the polishing unit 4 also includes an inner polishing wheel 44, an inner wheel frame 45, a manual adjustment rod 46, a transmission worm gear 47 and a rotating shaft 48; the inner wheel frame 45 is slidably fitted on the driving worm 32, and the inner wheel frame 45 is threadedly fitted on the outer thread surface of the manual adjustment rod 46, and the outer end of the manual adjustment rod 46 rotates on the inner side surface of the sliding ring 42; the rotating shaft 48 rotates on the inner wheel frame 45, and the transmission worm gear 47 is fixed in the middle of the rotating shaft 48, and the transmission worm gear 47 is engaged with the driving worm 32; an inner polishing wheel 44 is fixed at each end of the rotating shaft 48; an angle adjustment worm gear is fixed on the outer ring surface of the sliding ring 42, and the angle adjustment worm gear is engaged with the angle adjustment worm 49 rotating on the outer wheel frame 43.

[0054] The polishing unit 4 also includes an inner polishing wheel 44, which has a different direction from the outer polishing wheel 41 so as to perform different polishing treatments. When the driving worm 32 rotates, the driving worm 32 engages with the transmission to control the rotation of the transmission worm wheel 47. When the transmission worm wheel 47 rotates, it drives the rotating shaft 48 to rotate. When the rotating shaft 48 rotates, it drives the inner polishing wheels 44 at both ends to rotate, so that the inner polishing wheel 44 can perform polishing work; an angle-adjusting worm wheel is fixed on the outer ring surface of the sliding ring 42, and the angle-adjusting worm wheel is engaged with the angle-adjusting worm 49 rotating on the outer wheel frame 43. The rotation of the angle-adjusting worm wheel can be controlled by rotating the angle-adjusting worm 49 to engage the transmission. When the angle-adjusting worm wheel rotates, it can drive the sliding ring 42 to rotate. When the sliding ring 42 rotates, the inner wheel can be driven by the manual adjustment rod 46 The frame 45 performs a flipping motion on the driving worm 32, thereby adjusting the inclination angle of the inner polishing grinding wheel 44 to meet different polishing requirements; in addition, the distance between the inner wheel frame 45 and the sliding ring 42 can be adjusted by rotating the manual adjusting rod 46. When the manual adjusting rod 46 is rotated, its contact position with the inner wheel frame 45 can be changed, thereby driving the inner wheel frame 45 to slide on the driving worm 32 and driving the transmission worm wheel 47 to roll on the driving worm 32, and finally realizing the adjustment of the distance between the inner polishing grinding wheel 44 and the outer polishing grinding wheel 41, so that when the inner polishing grinding wheel 44 and the outer polishing grinding wheel 41 are used for polishing respectively, the inner polishing grinding wheel 44 and the outer polishing grinding wheel 41 will not interfere with each other; the sizes of the inner polishing grinding wheel 44 and the outer polishing grinding wheel 41 can be replaced according to actual needs.

[0055] The inner wheel frame 45 is threaded with a locking bolt, and the inner end of the locking bolt is tightened on the manual adjustment rod 46, which can improve the stability of the inner wheel frame 45 after displacement movement.

[0056] The axis of the rotating shaft 48 is perpendicular to the axis of the driving worm 32 ; the axis of the manual adjustment lever 46 is parallel to the axis of the driving worm 32 .

[0057] Principle: The metal surface polishing device can be used to polish the metal surface by the polishing unit 4 after each of the driving units 3 is started. The polishing unit 4 can be used to polish the metal surface. The metal to be polished can be supported and fixed by a clamp installed on the frame 1. The height of the metal to be polished can be adjusted by adjusting the height of the clamp so that the position to be polished contacts the polishing unit 4. After the polishing unit 4 is started, the metal surface to be polished can be polished by the polishing unit 4. The present invention is a multi-station polishing device, which can simultaneously perform synchronous polishing on both sides of the metal to be polished by the four polishing units 4 on the two support units 2, and the distance between the two polishing units 4 on each support unit 2 can also be adjusted by the polishing control unit 5. The polishing control unit 5 controls the horizontal movement of the two polishing units 4, thereby controlling the two polishing units 4 to perform horizontal movement polishing, thereby improving the polishing speed of the metal surface, and there is no need to always adjust the position of the metal.

[0058] The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the same or similar parts between the various embodiments. It should be noted that those skilled in the art may make various improvements and modifications to the present application without departing from the principles of the present application, and such improvements and modifications also fall within the scope of protection of the claims of the present application.

[0059] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

Claims

1. A metal surface polishing device, characterized in that: The invention comprises a frame (1), a support unit (2), a drive unit (3), a polishing unit (4) and a polishing control unit (5); the frame (1) is relatively connected to two support units (2); each support unit (2) is equipped with a drive unit (3) and a polishing control unit (5); each drive unit (3) is connected to two polishing units (4); the two polishing units (4) are connected to the polishing control unit (5) so as to move toward or away from each other at two ends of the drive unit (3) under the drive of the polishing control unit (5); The frame (1) comprises a frame body (11) and a bidirectional screw (12) rotatably connected to the lower portion of the frame body (11); a central slideway is provided in the middle of the frame body (11) for sliding engagement with two support units (2); the two support units (2) are threadedly engaged with the two ends of the bidirectional screw (12); an adjusting wheel or an adjusting motor is connected to the outer end of the bidirectional screw (12); The support unit (2) comprises an outer slide (21), a transverse axis (22), an inner slide (23), a compression spring (24) and a bracket (25); the outer slide (21) slides in the central slideway of the frame (11) and is threadedly engaged with the bidirectional screw (12); an inner slide (23) is provided on the inner side of the outer slide (21), and the inner slide (23) slides on two transverse axes (22), which are fixed side by side on the outer slide (21), and the axes of the transverse axes (22) are perpendicular to the bidirectional screw (12); a compression spring (24) is sleeved on the transverse axis (22), and the two ends of the compression spring (24) are respectively fixed to the outer side surface of the inner slide (23) and the outer side plate of the outer slide (21); the bracket (25) is fixed on the inner slide (23), and the drive unit (3) is mounted on the bracket (25); The driving unit (3) includes a double-output shaft motor (31) fixed on a bracket (25); the output shafts at both ends of the double-output shaft motor (31) are respectively connected to a driving worm (32) through a coupling, and the two driving worms (32) are connected to the two polishing units (4) in a one-to-one transmission manner; The polishing unit (4) comprises an outer polishing wheel (41), a sliding ring (42) and an outer wheel frame (43); the outer polishing wheel (41) is slidably fitted on the outer end of the driving worm (32); the driving worm (32) is provided with a guide groove, and the guide groove is slidably fitted with a guide ridge fixed in a sliding hole of the outer polishing wheel (41); one end of the sliding ring (42) rotates in an annular groove on the inner end surface of the outer polishing wheel (41), and the other end of the sliding ring (42) rotates on the outer wheel frame (43); the outer wheel frame (43) is connected to the polishing control unit (5); The polishing unit (4) further comprises an inner polishing wheel (44), an inner wheel frame (45), a manual adjustment rod (46), a transmission worm gear (47) and a rotating shaft (48); the inner wheel frame (45) is slidably fitted on the driving worm (32), the inner wheel frame (45) is threadedly fitted on the outer thread surface of the manual adjustment rod (46), and the outer end of the manual adjustment rod (46) rotates on the inner side surface of the sliding ring (42); the rotating shaft (48) rotates on the inner wheel frame (45), the transmission worm gear (47) is fixed in the middle of the rotating shaft (48), and the transmission worm gear (47) is meshed with the driving worm (32); an inner polishing wheel (44) is fixed at each end of the rotating shaft (48); an angle adjustment worm gear is fixed on the outer ring surface of the sliding ring (42), and the angle adjustment worm gear is meshed with the angle adjustment worm (49) rotating on the outer wheel frame (43).

2. A metal surface polishing device according to claim 1, characterized in that: The inner side plate of the outer slide seat (21) is threadedly matched with an elastic force adjustment screw rod (26), and the outer end of the elastic force adjustment screw rod (26) is pressed against the inner slide seat (23).

3. A metal surface polishing device according to claim 2, characterized in that: The polishing and grinding control unit (5) comprises a control motor (51), a control screw (52), a control slide (53) and a control connecting rod (54); the control motor (51) is fixed in the central cavity of the bracket (25); the output shaft of the control motor (51) is connected to the control screw (52) through transmission; the middle thread of the control screw (52) is connected to the control slide (53) sliding in the longitudinal slideway of the bracket (25); the two ends of the control slide (53) are respectively connected to one end of a control connecting rod (54) through rotation; the other ends of the two control connecting rods (54) are connected to the outer wheel frames (43) of the two polishing and grinding units (4) through rotation.

4. A metal surface polishing device according to claim 3, characterized in that: The inner wheel frame (45) is threadedly matched with a locking bolt, and the inner end of the locking bolt is tightly pressed against the manual adjustment rod (46).

5. The metal surface polishing device according to claim 4, characterized in that: The axis of the rotating shaft (48) is arranged perpendicularly to the axis of the driving worm (32); the axis of the manual adjustment rod (46) is arranged parallel to the axis of the driving worm (32).

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