CN213970336U - Novel online steel pipe end burr-grinding machine - Google Patents
Novel online steel pipe end burr-grinding machine Download PDFInfo
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- CN213970336U CN213970336U CN202022170123.3U CN202022170123U CN213970336U CN 213970336 U CN213970336 U CN 213970336U CN 202022170123 U CN202022170123 U CN 202022170123U CN 213970336 U CN213970336 U CN 213970336U
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- guide rail
- fixed
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 118
- 239000010959 steel Substances 0.000 title claims abstract description 118
- 238000000227 grinding Methods 0.000 title claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 21
- 229910052802 copper Inorganic materials 0.000 claims description 21
- 239000010949 copper Substances 0.000 claims description 21
- 230000001681 protective Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- 230000000875 corresponding Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000007493 shaping process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000428 dust Substances 0.000 description 7
- 101700044943 A103 Proteins 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
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Abstract
The utility model particularly relates to a novel online steel pipe end burr-grinding machine belongs to steel pipe tubular product manufacturing technical field, and the problem that solve provides a novel online steel pipe end burr-grinding machine, and the scheme of adoption is: the deburring roller assembly is used for removing burrs at the pipe end of a horizontally fixed steel pipe, the deburring roller assembly is connected with a screw assembly, the screw assembly is used for driving the deburring roller assembly to horizontally reciprocate along the direction vertical to the steel pipe, the screw assembly is connected with a guide rail assembly, the guide rail assembly is used for driving the screw assembly and the deburring roller assembly to reciprocate along the direction parallel to the steel pipe, a fixed base used for supporting the guide rail assembly is arranged below the guide rail assembly, and an alignment limiting assembly used for limiting the steel pipe is arranged between the guide rail assembly and the fixed base; the utility model discloses realize that steel pipe shaping and burring go on in step, improve the effect of cleaing away of steel pipe end burr.
Description
Technical Field
The utility model belongs to the technical field of steel pipe tubular product manufacturing, especially, relate to a novel online steel pipe end burr-grinding machine.
Background
The deburring working characteristics of the steel pipe end in the workshop steel pipe production process are as follows: the steel pipe after the processing is accomplished all need carry out burring processing, and the tradition is mainly rely on artifical burring to steel pipe burring work to the cone or the taper hole grit of relying on the design carry out the burring to the pipe end of steel pipe, and lean on this kind of traditional burring mode of manual work, the steel pipe burring production of small batch only is applicable to, and to large batch steel pipe production line, the automatic level of mode of artifical burring is low, and not only manufacturing cost is big, and work efficiency is low moreover. At present, some devices for removing burrs at the end part of a steel pipe by adopting a mechanical method exist, but the devices cannot adapt to the operation of removing the burrs at the end part of the steel pipe with longer length, and the burrs at the end part are difficult to remove.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes prior art exists not enough, a novel online steel pipe end burr-grinding machine is provided, it is not enough to have solved steel pipe end burring degree of automation, workman intensity of labour big scheduling problem, realize steel pipe shaping and burring and go on in step, and on the steel pipe direct fixation in steel pipe shaping conveyer line, a plurality of burr-grinding machines distribute on steel pipe shaping conveyer line, to longer steel pipe, especially the steel pipe that exceeds 12 meters commonly used, the work of conveniently getting rid of the burr goes on, improve the effect of cleaing away and optimize product quality of steel pipe end burr, and the production efficiency is improved simultaneously, and the production cost is saved.
In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a novel online steel pipe end burr-grinding machine, includes: the deburring device comprises a deburring roller assembly, a guide rail assembly, a screw rod assembly, an alignment limiting assembly and a fixed base, wherein the deburring roller assembly is used for removing burrs at the end of a steel pipe horizontally fixed on a steel pipe forming conveying line, the steel pipe to be deburred is fixed by adopting an industrial manipulator, the deburring roller assembly is connected with the screw rod assembly, the screw rod assembly is used for driving the deburring roller assembly to horizontally reciprocate along the direction vertical to the steel pipe, the screw rod assembly is connected with the guide rail assembly, the guide rail assembly is used for driving the screw rod assembly and the deburring roller assembly to reciprocate along the direction parallel to the steel pipe, and the fixed base used for supporting the guide rail assembly is arranged below the guide rail assembly;
the guide rail assembly with be provided with between the unable adjustment base align spacing assembly, align spacing assembly and include: cylinder D, push away material support and guide bar, push away the material support with unable adjustment base is fixed mutually, and the level sets up the guide bar with push away material support sliding connection, be connected with on the guide bar and be used for driving it relatively push away material support reciprocating sliding cylinder D, cylinder D cylinder body is relative unable adjustment base is fixed, the guide bar is used for lining up the steel pipe of waiting to remove the burr spacing. When the steel pipe is conveyed to the deburring machine through the steel pipe conveying line, the end part of the guide rod is used for supporting the steel pipe, then the steel pipe is clamped and fixed through the industrial manipulator, the guide rod returns to a waiting position, and the deburring roller is assembled to the end of the steel pipe through left, right, front and back movement to conduct deburring work.
The guide rail assembly comprises: the device comprises two guide rail supports, two guide rails B, a sliding block B, an air cylinder B and a brush roll moving base, wherein the two guide rail supports are arranged on two sides of a steel pipe to be deburred in parallel, the alignment limiting assembly is arranged between the two guide rail supports, the lower ends of the guide rail supports are fixed with the fixed base, the upper ends of the guide rail supports are respectively provided with the guide rail B, the guide rail B is a track which is assembled by the screw rod and the deburring roll and moves in a reciprocating manner along the direction parallel to the steel pipe, the guide rail B is provided with the brush roll moving base, the lower end of the brush roll moving base is connected with the sliding block B matched with the guide rail B, the sliding block B can horizontally slide in a reciprocating manner relative to the corresponding guide rail B, the cylinder body of the air cylinder B is fixed relative to the guide rail supports, and the piston rod of the air cylinder B is fixed with the brush roll moving base, the cylinder B is used for driving the brush roll moving base to slide in a reciprocating mode relative to the guide rail support, and the brush roll moving base is a supporting component assembled by the screw and the deburring roll.
The screw assembly includes: the brush roll moving base is connected with the brush roll moving base, the screw rod can rotate relative to the brush roll moving base, the speed reducing motor C is used for driving the screw rod to rotate, the speed reducing motor C is relative to the brush roll moving base and is fixed, and the copper nut is sleeved on the screw rod.
The deburring roller assembly comprises: the brush roll comprises a brush roll, a brush roll bracket, a speed reducing motor A and a brush roll driving shaft, wherein the brush roll is axially and vertically arranged, the upper end of the brush roll is coaxially fixed with the lower end of the brush roll driving shaft, the speed reducing motor A is used for driving the brush roll driving shaft to rotate, the brush roll driving shaft is sleeved with the brush roll bracket, the brush roll driving shaft can rotate relative to the brush roll bracket, the speed reducing motor A is fixed relative to the brush roll bracket, the brush roll bracket is fixed with the copper nut, a guide rail A parallel to the screw rod is arranged on the brush roll moving base, a slide block A matched with the guide rail A is connected on the brush roll bracket, the slide block A can slide relative to the guide rail A in a reciprocating mode, when the screw rod rotates under the driving of the speed reducing motor C, the copper nut drives the deburring roll assembly to horizontally move relative to the brush roll moving base, and adjusting the brush roll to the front end of the steel pipe to be deburred.
Novel online steel pipe end burr-grinding machine still includes: the brush roll moving base is fixed to the brush roll moving base, a strip-shaped hole through which the brush roll driving shaft penetrates is formed in the upper end face of the protective box, and the brush roll driving shaft can move in a reciprocating mode along the length direction of the strip-shaped hole.
The lower terminal surface of protective housing is connected with the hose, the other end of hose is connected with the air exhauster, and the setting of protective housing can prevent that the burr dust of getting rid of from splashing, keeps operational environment clean and tidy, avoids dust pollution to cause the threat for site work personnel is healthy.
And a rubber pad is fixed at one end of the guide rod, which faces the steel pipe, and is used for preventing the steel pipe from being scratched and removing burrs.
The brush roll drive shaft is connected with the brush roll bracket bearing.
The screw is connected with the brush roll moving base bearing.
The material pushing support is fixedly provided with a guide copper sleeve, the guide rod coaxially penetrates through the guide copper sleeve, and the guide rod can move in a reciprocating mode relative to the guide copper sleeve.
The working principle is as follows: the method comprises the steps that a plurality of deburring machines are arranged on a steel pipe forming production line, a conveying roller conveys a steel pipe to the deburring machine where an extension line position of the steel pipe is placed, when the steel pipe is conveyed to the deburring machine through a steel pipe conveying line, an air cylinder D drives a guide rod to move towards the direction of the steel pipe, the end portion of the guide rod abuts against the steel pipe to limit the position of the steel pipe, the end portion of the steel pipe is located in a working area of a brush roller, then an industrial manipulator is used for clamping and fixing the steel pipe, the guide rod returns to a waiting position, then a speed reducing motor C and an air cylinder B are started to enable the brush roller to be in contact with the end portion of the steel pipe, then the speed reducing motor A is started, the brush roller is driven to work to remove burrs at the end portion of the steel pipe, and burr removing work at the end portion of the steel pipe is completed; and in the burr removing process, the exhaust fan is started to collect and intensively treat removed burr dust.
Compared with the prior art, the utility model following beneficial effect has.
The utility model discloses a set up many burr-grinding machines on steel pipe fashioned production line, through the spacing assembly of alignment with the steel pipe spacing in the suitable position of burr-grinding machine, with the fixed back of steel pipe, the burr removal work of steel pipe end is accomplished to the brush roll that adopts the back-and-forth movement about can, it is not enough to have solved steel pipe end burring degree of automation, workman intensity of labour big scheduling problem, realize that steel pipe shaping and burring go on in step, to longer steel pipe, especially the steel pipe that exceeds 12 meters commonly used, the steel pipe direct attach to steel pipe shaping conveying line, conveniently get rid of going on of burr work, improve the effect of cleaing away and optimize product quality of steel pipe end burr, and the production efficiency is improved simultaneously, and the production cost.
Two, the utility model discloses can use with steel pipe fashioned production line is supporting, accomplish the work of getting rid of the burr of steel pipe tip on line, improve work efficiency.
Thirdly, the utility model discloses be provided with the protective housing, the burr dust that prevents to get rid of splashes, keeps operational environment clean and tidy, avoids dust pollution to lead to the fact the threat for the site work personnel is healthy.
Drawings
The present invention will be further described with reference to the accompanying drawings.
FIG. 1 is the first structural schematic diagram of the on-line steel pipe end deburring machine of the present invention.
Fig. 2 is the structure schematic diagram of the online steel pipe end deburring machine of the utility model II.
Fig. 3 is a front view of the on-line steel pipe end deburring machine of the present invention.
Fig. 4 is a left side view of the on-line steel pipe end deburring machine of the present invention.
Fig. 5 is a right side view of the on-line steel pipe end deburring machine of the present invention.
Fig. 6 is a top view of the on-line steel pipe end deburring machine of the present invention.
Fig. 7 is a schematic structural view of the deburring roller assembly of the present invention.
Fig. 8 is a schematic structural view of the screw assembly of the present invention.
Fig. 9 is a schematic structural diagram of the guide rail assembly of the present invention.
Fig. 10 is a schematic structural view of the alignment limiting assembly of the present invention.
In the figure: 1 is a deburring roller assembly, 101 is a brush roller, 102 is a brush roller support, 103 is a speed reducing motor A, 104 is a brush roller driving shaft, 105 is a guide rail A, 106 is a sliding block A, 2 is a guide rail assembly, 201 is a guide rail support, 202 is a guide rail B, 203 is a sliding block B, 204 is a cylinder B, 205 is a brush roller moving base, 3 is a screw rod assembly, 301 is a screw rod, 302 is a copper nut, 303 is a speed reducing motor C, 4 is an alignment limiting assembly, 401 is a cylinder D, 402 is a pushing support, 403 is a guide rod, 404 is a guide copper sleeve, 405 is a rubber pad, 5 is a fixed base, 6 is a protective box, 601 is a strip-shaped hole, and 602 is a hose.
Detailed Description
The following is a further description with reference to specific examples.
The utility model provides a novel online steel pipe end burr-grinding machine, includes: the deburring device comprises a deburring roller assembly 1, a guide rail assembly 2, a screw rod assembly 3, an alignment limiting assembly 4 and a fixed base 5, wherein the deburring roller assembly 1 is used for removing burrs at the end of a steel pipe horizontally fixed on a steel pipe forming conveying line, the steel pipe to be deburred is fixed by an industrial manipulator, the deburring roller assembly 1 is connected with the screw rod assembly 3, the screw rod assembly 3 is used for driving the deburring roller assembly 1 to horizontally reciprocate along the direction vertical to the steel pipe, the guide rail assembly 2 is connected onto the screw rod assembly 3, the guide rail assembly 2 is used for driving the screw rod assembly 3 and the deburring roller assembly 1 to reciprocate along the direction parallel to the steel pipe, and the fixed base 5 used for supporting the guide rail assembly 2 is arranged below the guide rail assembly 2;
The guide rail assembly 2 includes: the device comprises two guide rail brackets 201, two guide rails B202, a sliding block B203, an air cylinder B204 and a brush roll moving base 205, wherein the two guide rail brackets 201 are I-shaped, the two guide rail brackets 201 are arranged on two sides of a steel pipe to be deburred in parallel, the alignment limiting assembly 4 is arranged between the two guide rail brackets 201, the lower ends of the guide rail brackets 201 are fixed with the fixed base 5, the upper ends of the guide rail brackets 201 are respectively provided with the guide rails B202, the guide rails B202 are tracks for the screw assembly 3 and the deburring roller assembly 1 to reciprocate along the direction of the parallel steel pipe, the brush roll moving base 205 is arranged on the guide rails B202, the lower end of the brush roll moving base 205 is connected with the sliding block B203 matched with the guide rails B202, the sliding block B203 can horizontally reciprocate relative to the corresponding guide rails B202, and the cylinder body of the air cylinder B204 is fixed relative to the guide rail brackets 201, the piston rod of the cylinder B204 is fixed with the brush roll moving base 205, the cylinder B204 is used for driving the brush roll moving base 205 to slide in a reciprocating mode relative to the guide rail bracket 201, and the brush roll moving base 205 is a supporting component of the screw assembly 3 and the deburring roll assembly 1.
The screw assembly 3 includes: screw 301, copper nut 302 and gear motor C303, screw 301 is perpendicular guide rail B202 level sets up, screw 301 with the brush roll removes base 205 and is connected, just screw 301 can be relative the brush roll removes base 205 and rotates, gear motor C303 is used for the drive screw 301 is rotatory, gear motor C303 is relative the brush roll removes base 205 fixed, the cover is equipped with on the screw 301 copper nut 302.
The deburring roller assembly 1 comprises: the brush roll assembly comprises a brush roll 101, a brush roll bracket 102, a speed reducing motor A103 and a brush roll driving shaft 104, wherein the brush roll 101 is axially and vertically arranged, the upper end of the brush roll 101 is coaxially fixed with the lower end of the brush roll driving shaft 104, the speed reducing motor A103 is used for driving the brush roll driving shaft 104 to rotate, the brush roll bracket 102 is sleeved outside the brush roll driving shaft 104, the brush roll driving shaft 104 can rotate relative to the brush roll bracket 102, the speed reducing motor A103 is fixed relative to the brush roll bracket 102, the brush roll bracket 102 is fixed with a copper nut 302, a guide rail A105 parallel to a screw 301 is arranged on a brush roll moving base 205, a slide block A106 matched with the guide rail A105 is connected on the brush roll bracket 102, the slide block A106 can slide relative to the guide rail A105 in a reciprocating manner, when the screw 301 rotates under the driving of the speed reducing motor C303, the copper nut 302 drives the depilating roll assembly 1 to horizontally move relative to the brush roll moving base 205, the brush roller 101 is adjusted to the front end of the steel pipe to be deburred.
Novel online steel pipe end burr-grinding machine still includes: the brush roll moving base 205 is fixed to the protection box 6, the protection box 6 is sleeved outside the brush roll 101, the protection box 6 is fixed to the brush roll moving base 205, a strip-shaped hole 601 through which the brush roll driving shaft 104 penetrates is formed in the upper end face of the protection box 6, and the brush roll driving shaft 104 can reciprocate along the length direction of the strip-shaped hole 601.
The lower terminal surface of protective housing 6 is connected with hose 602, the other end of hose 602 is connected with the air exhauster, and the setting of protective housing 6 can prevent that the burr dust of getting rid of from splashing, keeps operational environment clean and tidy, avoids dust pollution to cause the threat for site work personnel healthy.
A rubber pad 405 is fixed at one end, facing the steel pipe, of the guide rod 403, and the rubber pad 405 is used for preventing the steel pipe with burrs from being scratched.
The brushroll drive shaft 104 is journalled to the brushroll holder 102.
The screw 301 is in bearing connection with the brush roll moving base 205.
A guide copper sleeve 404 is fixed on the pushing support 402, the guide rod 403 coaxially penetrates through the guide copper sleeve 404, and the guide rod 403 can reciprocate relative to the guide copper sleeve 404.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. It will be apparent to those skilled in the art that modifications and improvements can be made to the above-described embodiments without departing from the spirit and scope of the invention. Accordingly, it will be appreciated that those skilled in the art, upon attaining an understanding of the foregoing may readily produce alterations to, variations of, and equivalents to these embodiments without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (10)
1. The utility model provides a novel online steel pipe end burr-grinding machine which characterized in that includes: the steel pipe deburring device comprises a deburring roller assembly (1), a guide rail assembly (2), a screw rod assembly (3), an alignment limiting assembly (4) and a fixed base (5), wherein the deburring roller assembly (1) is used for removing burrs at the end of a steel pipe horizontally fixed on a steel pipe forming conveying line, the deburring roller assembly (1) is connected with the screw rod assembly (3), the screw rod assembly (3) is used for driving the deburring roller assembly (1) to horizontally reciprocate along the direction vertical to the steel pipe, the guide rail assembly (2) is connected onto the screw rod assembly (3), the guide rail assembly (2) is used for driving the screw rod assembly (3) and the deburring roller assembly (1) to reciprocate along the direction parallel to the steel pipe, and the fixed base (5) used for supporting the guide rail assembly (2) is arranged below the guide rail assembly (2);
guide rail assembly (2) with be provided with between unable adjustment base (5) align spacing assembly (4), align spacing assembly (4) and include: cylinder D (401), push away material support (402) and guide bar (403), push away material support (402) with unable adjustment base (5) are fixed mutually, and the level sets up guide bar (403) with push away material support (402) sliding connection, be connected with on guide bar (403) and be used for driving it relatively push away material support (402) reciprocating sliding cylinder D (401), cylinder D (401) cylinder body is relative unable adjustment base (5) are fixed, guide bar (403) are used for lining up spacing with the steel pipe of treating the burr.
2. The novel online steel pipe end deburring machine of claim 1, wherein said guide rail assembly (2) comprises: the device comprises two guide rail supports (201), two guide rails B (202), a sliding block B (203), an air cylinder B (204) and a brush roll moving base (205), wherein the two guide rail supports (201) are arranged on two sides of a steel pipe to be deburred in parallel, the lower end of each guide rail support (201) is fixed with the fixed base (5), the upper ends of the guide rail supports (201) are respectively provided with the guide rails B (202), the brush roll moving base (205) is arranged on the guide rails B (202), the lower end of the brush roll moving base (205) is connected with the sliding block B (203) matched with the guide rails B (202), the sliding block B (203) can horizontally slide in a reciprocating manner relative to the corresponding guide rails B (202), the cylinder body of the air cylinder B (204) is fixed relative to the guide rail supports (201), and the piston rod of the air cylinder B (204) is fixed with the brush roll moving base (205), the air cylinder B (204) is used for driving the brush roller moving base (205) to slide in a reciprocating mode relative to the guide rail bracket (201).
3. The novel online steel pipe end deburring machine of claim 2, wherein said screw assembly (3) comprises: screw rod (301), copper nut (302) and gear motor C (303), screw rod (301) are perpendicular guide rail B (202) level sets up, screw rod (301) with brush roll removes base (205) and connects, just screw rod (301) can be relative brush roll removes base (205) and rotates, gear motor C (303) are used for the drive screw rod (301) are rotatory, gear motor C (303) are relative brush roll removes base (205) and fixes, the cover is equipped with on screw rod (301) copper nut (302).
4. The novel in-line steel pipe end deburring machine of claim 3, wherein said deburring roller assembly (1) comprises: the brush roll comprises a brush roll (101), a brush roll bracket (102), a speed reduction motor A (103) and a brush roll driving shaft (104), wherein the brush roll (101) is axially and vertically arranged, the upper end of the brush roll (101) is coaxially fixed with the lower end of the brush roll driving shaft (104), the speed reduction motor A (103) is used for driving the brush roll driving shaft (104) to rotate, the brush roll bracket (102) is sleeved outside the brush roll driving shaft (104), the brush roll driving shaft (104) can rotate relative to the brush roll bracket (102), the speed reduction motor A (103) is fixed relative to the brush roll bracket (102), the brush roll bracket (102) is fixed with a copper nut (302), a guide rail A (105) parallel to a screw (301) is arranged on a brush roll moving base (205), and a sliding block A (106) matched with the guide rail A (105) is connected onto the brush roll bracket (102), the slide block A (106) can slide in a reciprocating mode relative to the guide rail A (105).
5. The novel online steel pipe end deburring machine of claim 4, characterized in that, the novel online steel pipe end deburring machine further comprises: the brush roll moving device comprises a protective box (6), the protective box (6) is sleeved outside the brush roll (101), the protective box (6) is fixed with the brush roll moving base (205), and a strip-shaped hole (601) through which the brush roll driving shaft (104) penetrates is formed in the upper end face of the protective box (6).
6. The novel online steel pipe end deburring machine of claim 5, wherein a hose (602) is connected to the lower end face of the protective box (6), and an exhaust fan is connected to the other end of the hose (602).
7. The novel online steel pipe end deburring machine of claim 6, wherein a rubber pad (405) is fixed at one end of the guide rod (403) facing the steel pipe.
8. The novel online steel pipe end deburring machine of claim 7 wherein said brushroll drive shaft (104) is bearing connected to said brushroll holder (102).
9. The novel online steel pipe end deburring machine of claim 8, characterized in that the screw (301) is in bearing connection with the brush roll moving base (205).
10. The novel online steel pipe end deburring machine as claimed in claim 9, wherein a guiding copper sleeve (404) is fixed on the pushing support (402), the guiding rod (403) coaxially penetrates through the guiding copper sleeve (404), and the guiding rod (403) can reciprocate relative to the guiding copper sleeve (404).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022170123.3U CN213970336U (en) | 2020-09-28 | 2020-09-28 | Novel online steel pipe end burr-grinding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022170123.3U CN213970336U (en) | 2020-09-28 | 2020-09-28 | Novel online steel pipe end burr-grinding machine |
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| Publication Number | Publication Date |
|---|---|
| CN213970336U true CN213970336U (en) | 2021-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022170123.3U Active CN213970336U (en) | 2020-09-28 | 2020-09-28 | Novel online steel pipe end burr-grinding machine |
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| Country | Link |
|---|---|
| CN (1) | CN213970336U (en) |
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2020
- 2020-09-28 CN CN202022170123.3U patent/CN213970336U/en active Active
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