CN217992021U - Steel pipe fitting burnishing and polishing device - Google Patents

Abstract

The utility model relates to a burnishing and polishing device technical field, concretely relates to steel pipe fitting burnishing and polishing device, include: the upper surface of the workbench is fixedly provided with a left supporting plate and a right supporting plate; the driving motor is fixed at the left end of the workbench, and an output shaft of the driving motor is connected with the left supporting plate; the telescopic piece is fixed at the right end of the workbench, and the telescopic end of the telescopic piece penetrates through the right supporting plate; the number of the supporting pieces is 1, and the number of the supporting pieces is respectively arranged on the output shaft of the driving motor and the telescopic end of the telescopic piece; the threaded rod transmission part is in transmission connection with the driving motor; the connecting plate is arranged on the threaded transmission part; one end of the connecting plate, which is close to the supporting piece, is welded with a fixing plate, and the fixing plate is provided with a polishing abrasive cloth. The utility model discloses a set up the rotation that 1 motor drove the removal of burnishing and polishing part and steel pipe, reduced the cost of motor in the device preparation part to a certain extent, can also reduce the consumption of burnishing and polishing in-process energy to a certain extent.

Description

Steel pipe fitting burnishing and polishing device

Technical Field

The utility model relates to a burnishing and polishing device technical field, concretely relates to steel pipe fitting burnishing and polishing device.

Background

Steel pipe is a commonly used tubular member that is often used in manufacturing processes in automotive production, such as automotive operators, shock absorbers, drive shafts, steering gears, and automotive accessories, among others. The steel pipe fitting is passivated when being delivered from a factory, a compact oxide film is formed on the surface, and the steel pipe fitting shows good corrosion resistance in the atmospheric environment. However, in the process of manufacturing a product from an initial pipe, the steel pipe sometimes needs to undergo processes such as welding, adjustment and repair, which may cause physical damage to the surface passivation film to different degrees, especially to adjustment and repair discoloration and welding black and gray, and in order to ensure the appearance quality, the steel pipe generally needs to be polished.

The traditional grinding and polishing mode is as follows: the manual hand-held grinding and polishing equipment is used for operation, the operation mode has high requirements on the technical level of an operator, and meanwhile, the grinding efficiency is low, the labor intensity is high, and in addition, the grinding quality is uneven. Along with the development of mechanical automation, more and more burnishing and polishing devices also appear among the prior art and can replace the manual work to carry out the operation, can reduce intensity of labour to a certain extent, improve burnishing and polishing efficiency, can also guarantee the quality of polishing simultaneously.

The application number CN202021805168.7 discloses a steel pipe polishing device for machining production, which drives a first hydraulic rod to extend through a first hydraulic pump so as to push a supporting sliding rod to slide towards the middle and further push a steel pipe through a push rod, and simultaneously a first servo motor drives the push rod to rotate so as to indirectly drive the steel pipe to rotate; meanwhile, the second hydraulic pump drives the second hydraulic rod to extend to drive the lifting sliding mounting plate to slide downwards on the surface of the track, so that the polishing belt is attached to the surface of the steel pipe, and the third servo motor drives the polishing belt roller to rotate and the electric polishing belt to rapidly polish the steel pipe; in addition, the second servo motor drives the screw rod to rotate, so that the T-shaped mounting plate is driven to move to one side through the nut, and the surface of the steel pipe is comprehensively polished.

Application number CN202120863043.8 discloses a stainless steel pipe polishing device, which fixes a steel pipe by arranging a first hydraulic telescopic rod electric fixing plate, and can meet the requirements of steel pipes with different lengths; the steel pipe can be driven to rotate through the second motor, so that polishing is more sufficient; the second hydraulic telescopic rod can drive the polishing knife to move, so that the contact degree of the polishing knife and the steel pipe is different, and the steel pipes with different degrees can be polished according to requirements; can drive the length direction removal of polishing sword along the steel pipe and then polish comprehensively the steel pipe surface through setting up the second motor.

Undeniably, the burnishing and polishing device disclosed by the patent can replace manual work to operate, can improve the burnishing and polishing efficiency, and ensure the burnishing and polishing quality. It also has certain disadvantages: the movement of the grinding and polishing part needs a motor to drive; the rotation of steel pipe needs another motor drive, and the action of 2 parts needs by different motor drive, and this can increase the cost of motor in the device preparation to a certain extent, and can consume more energy at the burnishing and polishing process.

The inventor designs a steel pipe fitting is polished and is adorned equipment, and it improves the overall arrangement of each part, drives the removal of burnishing and polishing part and the rotation of steel pipe through setting up 1 motor, has reduced the cost of motor in the device preparation part to a certain extent, can also reduce the consumption of burnishing and polishing in-process energy to a certain extent. In marked contrast to the other sanding and polishing devices of the above-mentioned patents and prior art.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steel pipe fitting burnishing and polishing device, its rotation through setting up the removal and the steel pipe that 1 motor drove the burnishing and polishing part has reduced the cost of motor in the device preparation part to a certain extent, can also reduce the consumption of burnishing and polishing in-process energy to a certain extent.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a steel pipe fitting burnishing and polishing device includes:

the upper surface of the workbench is fixedly provided with a left support plate and a right support plate at intervals along the width direction of the workbench;

the driving motor is fixed at the left end of the workbench, and an output shaft of the driving motor vertically penetrates through the left supporting plate and is rotationally connected with the left supporting plate;

the telescopic piece is fixed at the right end of the workbench, and the telescopic end of the telescopic piece vertically penetrates through the right supporting plate;

the number of the supporting pieces is 1, and the number of the supporting pieces is 1, wherein the number of the supporting pieces is 1, and the number of the supporting pieces is 1;

the right end of the threaded rod is rotatably connected to the right supporting plate, and the left end of the threaded rod vertically penetrates through and is rotatably connected with the left supporting plate; the first synchronous belt wheel is fixed on the left end of the threaded rod; the second synchronous belt wheel is fixed on an output shaft of the driving motor; the synchronous belt drive is connected with the first synchronous belt pulley and the second synchronous belt pulley; the sliding seat is in threaded fit with the threaded rod;

the connecting plate is arranged at the top of the sliding seat; one end of the connecting plate, which is close to the supporting piece, is vertically welded with a fixing plate, and the fixing plate is provided with a polishing abrasive cloth.

Preferably, the two ends of the bottom of the sliding seat are respectively provided with a sliding groove; and a guide rail which is matched with the sliding groove in a sliding and guiding manner is fixed on the workbench.

Preferably, the support piece comprises a connecting cylinder and a supporting seat which is fixed at one end of the connecting cylinder and is conical, a fixing cylinder which is arranged along the radial direction of the connecting cylinder and is communicated with the inside of the connecting cylinder is arranged on the outer wall of the connecting cylinder, and a fixing bolt is connected to the inner thread of the fixing cylinder.

Preferably, a connecting shaft is welded at the telescopic end of the telescopic piece, and a bearing is arranged on the connecting shaft in an interference fit manner; the connecting cylinder of the supporting piece on the end part of the output shaft of the driving motor is sleeved on the output shaft of the driving motor, and when the corresponding fixing bolt is screwed, the inner end of the fixing bolt is abutted against the output shaft of the driving motor; the connecting cylinder of the supporting piece on the telescopic end of the telescopic piece is sleeved on the bearing, and when the corresponding fixing bolt is screwed, the inner end of the fixing bolt is abutted to the outer wall of the bearing.

Preferably, the telescopic part is an electric push rod, a hydraulic telescopic rod or a cylinder.

Preferably, a waist-shaped hole perpendicular to the moving direction of the sliding seat is formed in the connecting plate, an adjusting bolt is arranged in the waist-shaped hole, and a limiting cap is fixed at the top of the adjusting bolt; and a connecting sleeve which corresponds to the waist-shaped hole in position and is in threaded fit with the adjusting bolt is fixed on the upper surface of the sliding seat, and when the adjusting bolt is screwed, the limiting cap is abutted against the connecting plate.

Preferably, a touch pressing cylinder is respectively fixed on the left side surface and the right side surface of the sliding seat; and contact switches corresponding to the positions of the touch pressing cylinders are respectively arranged on the left supporting plate and the right supporting plate and are electrically connected with the driving motor.

Preferably, the left side of the sliding seat is in threaded connection with an extension rod in the touch pressing cylinder.

Preferably, the steel pipe fitting polishing device further comprises a transparent protective cover, the rear end of the transparent protective cover is hinged to the workbench, two sides of the transparent protective cover are correspondingly attached to the outer sides of the tops of the left supporting plate and the right supporting plate, and the front end of the transparent protective cover abuts against the workbench; the top of the transparent protective cover is provided with an air hole; a plurality of mounting holes are formed in the rear side of the transparent protective cover at intervals, and an exhaust fan is fixed in each mounting hole; and a dust collection cover for covering the exhaust fan is fixed on the outer wall of the rear side of the transparent protective cover, and an exhaust pipe is connected to the dust collection cover.

Preferably, a control switch connected with the driving motor, the telescopic piece and the exhaust fan is fixed on the workbench.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) The utility model is provided with the expansion piece and the support piece, the steel pipe fitting can be fixed by means of the expansion piece, and meanwhile, the function of the expansion piece can meet the fixation of steel pipes with different lengths; the supporting seat of the supporting piece is conical, so that the steel pipe fittings with different inner diameter sizes can be supported; meanwhile, the support piece, the driving motor and the telescopic piece are detachably connected, so that the replacement and the ordinary maintenance can be facilitated.

(2) The utility model discloses connect driving motor and threaded rod transmission with the help of synchronous pulley and hold-in range, when driving motor drove the steel-pipe fitting and rotate, driving motor also can drive the threaded rod and rotate, the threaded rod rotates and drives the slide and remove, and then drive the removal of connecting plate and burnishing and polishing emery cloth, thereby realize that 1 motor drives burnishing and polishing part's removal and steel-pipe fitting's rotation, the cost of motor in the device preparation part has been reduced to a certain extent, can also reduce the consumption of burnishing and polishing in-process energy to a certain extent.

(3) The utility model discloses be equipped with the spout in the bottom of slide, be provided with the guide rail on the workstation simultaneously, the smooth and easy that the slide removed can be guaranteed in the cooperation of the slip direction through spout and guide rail, and then is favorable to developing smoothly of burnishing and polishing work.

(4) The utility model is provided with a waist-shaped hole on the connecting plate, and is also provided with an adjusting bolt which is provided with a limit cap; be equipped with corresponding adapter sleeve on the slide in addition, can be according to the position of the big or small adjustment connecting plate of steel pipe external diameter through above setting up to make burnishing and polishing emery cloth can hug closely on the steel pipe fitting, maneuverability is strong.

(5) The utility model discloses be provided with contact switch, touch and press a section of thick bamboo and extension bar, when the slide removed the tip of steel-pipe fitting, touch and press a section of thick bamboo or extension bar and touch and press the contact switch of the position department that corresponds, make motor transform pivoted direction, and then realize the mechanical automation to certain degree to the continuous many times burnishing and polishing of steel-pipe fitting.

(6) The utility model discloses be provided with transparent protection casing, be equipped with air exhauster, dust cage and blast pipe on the transparent protection casing, can collect the processing to dust and other impurity that the burnishing and polishing in-process produced through the setting above, avoid contaminated air and cause the injury to the human body.

(7) The utility model discloses with the problem of solving current burnishing and polishing device existence as the starting point, design a plurality of parts such as extensible member, support piece, screw drive spare and transparent protection casing, drive the removal of burnishing and polishing part and the rotation of steel pipe fitting through 1 motor, reduced the cost of motor in the device preparation part to a certain extent, can also reduce the consumption of burnishing and polishing in-process energy to a certain extent. In addition, the device has strong operability and certain degree of mechanical automation, and can realize continuous and repeated grinding and polishing of the steel pipe fitting; secondly, can collect the processing to dust and other impurity that produce among the polishing process of polishing, avoid polluting the air and cause the injury to the human body.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a view showing the transparent shield of FIG. 1 in an opened state;

FIG. 4 is a schematic view of the connection structure of the slide base and the connection plate according to the present invention;

FIG. 5 is an exploded view of FIG. 4;

FIG. 6 is a schematic structural view of the transparent protective cover of the present invention;

FIG. 7 is an exploded view of FIG. 6;

fig. 8 is a schematic view of a connection structure of the driving motor and the supporting member according to the present invention;

FIG. 9 is an exploded view of FIG. 8;

FIG. 10 is a schematic view of the connection structure of the telescopic member and the supporting member according to the present invention;

FIG. 11 is an exploded view of FIG. 10;

description of the main reference numerals:

100. a work table; 101. a left support plate; 102. a right support plate; 103. a contact switch; 104. a control switch; 105. a guide rail;

200. a drive motor;

300. a telescoping member; 301. a connecting shaft; 302. a bearing;

400. a support member; 401. a connecting cylinder; 402. a supporting seat; 403. a fixed cylinder; 404. a fixing bolt;

500. a threaded rod transmission member; 501. a threaded rod; 502. a first timing pulley; 503. a second timing pulley; 504. a synchronous belt; 505. a slide base; 5051. a chute; 506. connecting sleeves; 507. a touch pressing cylinder; 508. Lengthening a rod;

600. a connecting plate; 601. a fixing plate; 602. grinding and polishing abrasive cloth; 603. a kidney-shaped hole; 604. adjusting the bolt; 605. a limiting cap;

700. a transparent protective cover; 701. air holes are formed; 702. mounting holes; 703. an exhaust fan; 704. a dust collection cover; 705. an exhaust pipe;

800. a steel pipe fitting.

Detailed Description

The technical solution of the present invention is described clearly and completely below.

Examples

Referring to fig. 1 to 11, a steel pipe grinding and polishing apparatus includes:

a table 100 having a left support plate 101 and a right support plate 102 fixed to an upper surface thereof at an interval in a width direction thereof;

a driving motor 200 fixed to the left end of the table 100, an output shaft of which vertically penetrates the left support plate 101 and is rotatably connected thereto;

an extensible member 300 fixed to the right end of the table 100, the extensible end of which vertically penetrates the right support plate 102; the telescopic member 300 is an electric push rod, a hydraulic telescopic rod or a cylinder, in this embodiment, the telescopic member 300 is an electric push rod;

a support member 400, 1 fixed to an end of an output shaft of the driving motor 200, and 1 rotatably provided to a telescopic end of the telescopic member 300;

the threaded rod transmission piece 500 comprises a threaded rod 501, a first synchronous pulley 502, a second synchronous pulley 503, a synchronous belt 504 and a sliding seat 505, wherein the right end of the threaded rod 501 is rotatably connected to the right support plate 102, and the left end of the threaded rod 501 vertically penetrates through and is rotatably connected with the left support plate 101; a first synchronous pulley 502 is fixed on the left end of the threaded rod 501; a second timing pulley 503 is fixed to the output shaft of the drive motor 200; the synchronous belt 504 is in transmission connection with a first synchronous belt pulley 502 and a second synchronous belt pulley 503; the sliding base 505 is in threaded fit with the threaded rod 501, in addition, two ends of the bottom of the sliding base 505 are respectively provided with a sliding chute 5051, and a guide rail 105 which is in sliding guide fit with the sliding chute 5051 is fixed on the workbench 100;

a connection plate 600 disposed on the top of the slider 505; one end of the connecting plate 600 close to the support 400 is vertically welded with a fixing plate 601, and the fixing plate 601 is provided with a polishing abrasive cloth 602;

the rear end of the transparent protective cover 700 is hinged on the workbench 100, the two sides of the transparent protective cover are correspondingly attached to the outer sides of the tops of the left support plate 101 and the right support plate 102, and the front end of the transparent protective cover is abutted on the workbench 100; the top of the transparent protective cover 700 is provided with air holes 701, the rear side of the transparent protective cover is provided with a plurality of mounting holes 702 at intervals, and an exhaust fan 703 is fixed in each mounting hole 702; a dust hood 704 for covering the exhaust fan 703 is fixed on the outer wall of the rear side of the transparent protective cover 700, an exhaust pipe 705 is connected to the dust hood 704, in the actual use process, the air outlet end of the exhaust pipe 705 can be connected into a cloth bag, and the cloth bag is used for collecting dust and other impurities generated in the polishing process, so that the polluted air is prevented from being directly discharged;

in this embodiment, the specific structure of the supporting member 400 is: the supporting member 400 comprises a connecting cylinder 401 and a conical supporting seat 402 fixed at one end of the connecting cylinder 401, a fixed cylinder 403 arranged along the radial direction of the connecting cylinder 401 and communicated with the inside of the connecting cylinder is arranged on the outer wall of the connecting cylinder 401, and a fixed bolt 404 is connected with an internal thread of the fixed cylinder 403; the specific connection manner of the supporting member 400, the driving motor 200 and the telescopic member 300 is as follows: the connecting cylinder 401 of the supporting piece 400 on the end part of the output shaft of the driving motor 200 is sleeved on the output shaft of the driving motor 200, and when the corresponding fixing bolt 404 is screwed, the inner end of the fixing bolt 404 is abutted on the output shaft of the driving motor 200; a connecting shaft 301 is welded at the telescopic end of the telescopic piece 300, and a bearing 302 is arranged on the connecting shaft 301 in an interference fit manner; the connecting cylinder 401 of the supporting member 400 at the telescopic end of the telescopic member 300 is sleeved on the bearing 302, and when the corresponding fixing bolt 404 is screwed, the inner end of the fixing bolt 404 abuts against the outer wall of the bearing 302.

In addition, in this embodiment, the specific arrangement of the connection plate 600 is as follows: a waist-shaped hole 603 perpendicular to the moving direction of the sliding seat 505 is formed in the connecting plate 600, an adjusting bolt 604 is arranged in the waist-shaped hole 603, and a limiting cap 605 is fixed at the top of the adjusting bolt 604; a connecting sleeve 506 which corresponds to the position of the waist-shaped hole 603 and is in threaded fit with the adjusting bolt 604 is fixed on the upper surface of the sliding seat 505, and when the adjusting bolt 604 is screwed, the limiting cap 605 abuts against the connecting plate 600. In order to prevent the connection plate 600 from rotating, the connection sleeves 506 are spaced by 2. It should be noted here that the height of the connecting sleeve 506 is smaller than the thickness of the connecting plate 600;

secondly, in the present embodiment, in order to facilitate repeated polishing of the steel pipe 800, a touch-pressure cylinder 507 is fixed on each of the left and right side surfaces of the sliding base 505; the left support plate 101 and the right support plate 102 are respectively provided with a contact switch 103 corresponding to the position of the pressure cylinder 507, and the contact switches 103 are electrically connected with the driving motor 200; under the condition that the steel pipe fitting 800 is short, when the touch pressing cylinder 507 on the right side of the sliding seat 505 is not touched and pressed on the contact switch 103 at the corresponding position, the steel pipe fitting 800 is polished once, in order to avoid the situation, the touch pressing cylinder 507 on the left side of the sliding seat 505 is connected with an extension rod 508 in a threaded mode, the extension rod 508 is generally required to be used, and the extension rod 508 has multiple length scales so as to meet the requirements of different conditions; in addition, it should be added that when the sliding seat 505 moves to the leftmost end of the steel pipe 800, the contact cylinder 507 on the left side of the sliding seat 505 triggers the contact switch 103 on the left support plate 101;

finally, in this embodiment, a control switch 104 connected to the drive motor 200, the expansion member 300, and the suction fan 703 is fixed to the table 100.

It should be added that, in this embodiment, the driving motor 200, the expansion member 300 and the suction fan 703 are all connected to an external power supply; the driving motor 200 is a servo motor with a decelerator.

The working principle of the grinding and polishing device in this embodiment is briefly described as follows:

when the steel pipe fitting 300 telescopic end fixing device is used, the transparent protective cover 700 is opened, one end of the steel pipe fitting 800 to be polished is sleeved on the supporting seat 402 on the output shaft of the driving motor 200, then the telescopic end of the telescopic piece 300 is controlled to extend through the control switch 104, when the telescopic end of the telescopic piece 300 is close to the end portion of the steel pipe fitting 800, the supporting seat 402 of the steel pipe fitting 800, which is aligned to the telescopic end of the telescopic piece 300, and when the end portion of the steel pipe fitting 800 abuts against the supporting seat 402 on the telescopic end of the telescopic piece 300, the telescopic end of the telescopic piece 300 is controlled to stop moving through the control switch 104.

Observing the distance from the right side of the sliding seat 505 to the contact switch 103 on the right support plate 102, an extension rod 508 with a proper length is selected so that when the sliding seat 505 moves to the rightmost end of the steel pipe fitting 800, the extension rod 508 can touch the contact switch 103.

Adjusting the position of the connection plate 600, loosening the adjusting bolt 604 by means of the limiting cap 605, then moving the connection plate 600 to make the polishing abrasive cloth 602 cling to the steel pipe 800, then screwing the adjusting bolt 604, and at this time, the limiting cap 605 abuts on the upper surface of the connection plate 600 to tightly press the connection plate 600 on the sliding base 505, thereby completing the adjustment and fixation of the connection plate 600.

The transparent shield 700 is covered and the drive motor 200 and the suction fan 703 are actuated by the control switch 104. When the driving motor 200 works, the steel pipe 800 is driven to rotate by the supporting piece 400 connected with the driving motor 200, meanwhile, the driving motor 200 also drives the second synchronous belt pulley 503 to rotate, the second synchronous belt pulley 503 drives the first synchronous belt pulley 502 to rotate by the synchronous belt 504, the first synchronous belt pulley 502 drives the threaded rod 501 to rotate, the threaded rod 501 drives the slide base 505 guide rail 105 to move by the thread fit relation between the slide base 505 when rotating, the slide base 505 drives the connecting plate 600 and the polishing abrasive cloth 602 to synchronously move when moving, and the polishing abrasive cloth 602 is in contact with the rotating steel pipe 800 in the moving process, so that the comprehensive polishing and burnishing of the steel pipe 800 are realized. When the sliding base 505 moves to the rightmost end of the steel pipe piece 800, the extension rod 508 on the right side of the sliding base 505 touches and presses the contact switch 103 on the right supporting plate 102, the contact switch 103 controls the driving motor 200 to rotate reversely after being triggered, the sliding base 505 and the polishing abrasive cloth 602 move leftwards, and the steel pipe piece 800 is polished for the second time; when the sliding base 505 moves to the leftmost end of the steel pipe fitting 800, the contact pressing cylinder 507 on the left side of the sliding base 505 presses the contact switch 103 on the left supporting plate 101, the contact switch 103 controls the driving motor 200 to rotate in the forward direction after being triggered, and the continuous grinding and polishing of the steel pipe fitting 800 can be achieved repeatedly.

During the polishing process of the steel pipe 800, the exhaust fan 703 sucks the generated dust and other impurities into the dust collecting hood 704 and discharges the dust and other impurities from the exhaust pipe 705, and the dust and other impurities discharged from the air outlet end of the exhaust pipe 705 are collected to prevent air pollution.

After the grinding and polishing are finished, the motor 200 and the exhaust fan 703 are driven to stop through the control switch 104, the telescopic end of the telescopic part 300 is controlled to retract, the transparent protective cover 700 is opened, and the steel pipe fitting 800 is taken out.

The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated.

Claims (10)

1. The utility model provides a steel pipe fitting burnishing and polishing device which characterized in that includes:

the upper surface of the workbench is fixed with a left support plate and a right support plate at intervals along the width direction of the workbench;

the driving motor is fixed at the left end of the workbench, and an output shaft of the driving motor vertically penetrates through the left supporting plate and is rotationally connected with the left supporting plate;

the telescopic piece is fixed at the right end of the workbench, and the telescopic end of the telescopic piece vertically penetrates through the right supporting plate;

the number of the supporting pieces is 1, and the number of the supporting pieces is 1, wherein the number of the supporting pieces is 1, and the number of the supporting pieces is 1;

the right end of the threaded rod is rotatably connected to the right supporting plate, and the left end of the threaded rod vertically penetrates through and is rotatably connected with the left supporting plate; the first synchronous belt wheel is fixed on the left end of the threaded rod; the second synchronous belt wheel is fixed on an output shaft of the driving motor; the synchronous belt drive is connected with the first synchronous belt pulley and the second synchronous belt pulley; the sliding seat is in threaded fit with the threaded rod;

the connecting plate is arranged at the top of the sliding seat; one end of the connecting plate, which is close to the supporting piece, is vertically welded with a fixing plate, and the fixing plate is provided with a polishing abrasive cloth.

2. The steel pipe fitting grinding and polishing device according to claim 1, wherein sliding grooves are formed in two ends of the bottom of the sliding seat respectively; and a guide rail which is in sliding guide fit with the sliding groove is fixed on the workbench.

3. The steel pipe grinding and polishing device according to claim 1, wherein the supporting member comprises a connecting cylinder and a conical supporting seat fixed to one end of the connecting cylinder, a fixing cylinder is arranged on an outer wall of the connecting cylinder in a radial direction and communicated with the inside of the connecting cylinder, and a fixing bolt is connected to the fixing cylinder in a threaded manner.

4. The steel pipe grinding and polishing device according to claim 3, wherein a connecting shaft is welded to the telescopic end of the telescopic member, and a bearing is arranged on the connecting shaft in an interference fit manner;

the connecting cylinder of the supporting piece on the end part of the output shaft of the driving motor is sleeved on the output shaft of the driving motor, and when the corresponding fixing bolt is screwed, the inner end of the fixing bolt is abutted against the output shaft of the driving motor;

the connecting cylinder of the supporting piece on the telescopic end of the telescopic piece is sleeved on the bearing, and when the corresponding fixing bolt is screwed, the inner end of the fixing bolt is abutted to the outer wall of the bearing.

5. The steel pipe fitting grinding and polishing device according to claim 1, wherein the telescopic member is an electric push rod, a hydraulic telescopic rod or a cylinder.

6. The steel pipe grinding and polishing device according to claim 1, wherein a kidney-shaped hole perpendicular to the moving direction of the sliding seat is formed in the connecting plate, an adjusting bolt is arranged in the kidney-shaped hole, and a limiting cap is fixed to the top of the adjusting bolt;

and a connecting sleeve which corresponds to the waist-shaped hole in position and is in threaded fit with the adjusting bolt is fixed on the upper surface of the sliding seat, and when the adjusting bolt is screwed, the limiting cap is abutted against the connecting plate.

7. The steel pipe fitting grinding and polishing device according to claim 1, wherein a touch-pressure cylinder is fixed on each of the left and right side surfaces of the sliding base; and contact switches corresponding to the positions of the touch pressing cylinders are respectively arranged on the left supporting plate and the right supporting plate and are electrically connected with the driving motor.

8. The steel pipe sanding device according to claim 7, wherein an extension bar is screwed into the left side contact pressing cylinder of the slide.

9. The steel pipe fitting grinding and polishing device according to claim 1, further comprising a transparent protective cover, wherein the rear end of the transparent protective cover is hinged to the workbench, two sides of the transparent protective cover are correspondingly attached to the outer sides of the tops of the left support plate and the right support plate, and the front end of the transparent protective cover abuts against the workbench; the top of the transparent protective cover is provided with an air hole;

a plurality of mounting holes are formed in the rear side of the transparent protective cover at intervals, and an exhaust fan is fixed in each mounting hole; and a dust collection cover for covering the exhaust fan is fixed on the outer wall of the rear side of the transparent protective cover, and an exhaust pipe is connected to the dust collection cover.

10. The steel pipe fitting grinding and polishing device according to claim 9, wherein a control switch connected with the driving motor, the telescopic member and the exhaust fan is fixed on the workbench.

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