CN108381071A - A kind of supplied materials strainer of circle plug spot welding device - Google Patents

A kind of supplied materials strainer of circle plug spot welding device Download PDF

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Publication number
CN108381071A
CN108381071A CN201810186463.XA CN201810186463A CN108381071A CN 108381071 A CN108381071 A CN 108381071A CN 201810186463 A CN201810186463 A CN 201810186463A CN 108381071 A CN108381071 A CN 108381071A
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CN
China
Prior art keywords
spot welding
end
out against
hole
supplied materials
Prior art date
Application number
CN201810186463.XA
Other languages
Chinese (zh)
Inventor
张利平
王静鸽
尹更新
孙红章
张帅
Original Assignee
河南科技大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 河南科技大学 filed Critical 河南科技大学
Priority to CN201810186463.XA priority Critical patent/CN108381071A/en
Publication of CN108381071A publication Critical patent/CN108381071A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0426Fixtures for other work
    • B23K37/0435Clamps
    • B23K37/0443Jigs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/047Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps

Abstract

A kind of supplied materials strainer of circle plug spot welding device, it include the tensioning head for being tensioned material, tensioning head is connected to one end of the conductive mandrel by stepper motor driving rotation, and with conductive mandrel synchronous rotary, the tensioning head includes the cylindrical outer cover body being mutually arranged and fastening core, the side of the outer housing is circumferentially evenly equipped with hole, after outer housing and fastening core retainer plate set connection, it is formed inside tensioning head and accommodates the cavity for holding out against column, hold out against the tension adjusting gear cooperation installation on one end and tensioning head of column, and apply power of different sizes to holding out against column by tension adjusting gear, the column cap that holds out against for holding out against column end is set to stretch out different length from the hole of shell body side surface, the tensioning degree of the material on tensioning head is sleeved on control.The present invention can be tensioned supplied materials when spot welding and can be evenly distributed with rotary index automatically in 360 ° of circumference to facilitate spot welding, substantially increase the working efficiency of the spot welding device of round plug.

Description

A kind of supplied materials strainer of circle plug spot welding device

Technical field

The invention belongs to technical fields of mechanical processing, and in particular to a kind of supplied materials tensioning device of circle plug spot welding device Structure, the mechanism are applied to the surface part circular metal shell of round plug and are combined the dress of spot welding with strip metal member It sets.

Background technology

In certain round plugs, the perimeter surface of the circular metal housing part of outer exterior portion wants the point of uniformity specification to burn-on One circle band bar shaped metal parts, completes the combination of two kinds of parts, for a procedure of finished parts production, the at present production of this process Without corresponding ready-made spot welding device, the progress of point welding process is significantly impacted, the production of product is seriously hindered.For this feelings Condition inventor provides a kind of spot welding device of round plug, can be very good the spot welding for being automatically performed two kinds of parts, meet The technological requirement of this process makes up present situation of the existing production process without corresponding spot welding device, round due to during spot welding The tensioning degree of metal shell directly influences the effect of spot welding, therefore in spot welding device, and the supplied materials to spot welding is round gold The tensioning for belonging to shell is most important, needs special strainer to realize the tensioning of supplied materials.

Invention content

The object of the present invention is to provide a kind of supplied materials strainers of round plug spot welding device, are applied to round electric mortiser The surface part circular metal shell of head and the device that spot welding is combined with strip metal member, can be tensioned when spot welding Circular metal shell supplied materials simultaneously can be evenly distributed with rotary index automatically in 360 ° of circumference, to facilitate the spot welding of each welding position.

In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is:A kind of circle plug spot welding device Supplied materials strainer, include the tensioning head for being tensioned material, tensioning head be connected to by stepper motor driving rotation conduction One end of mandrel, and with conductive mandrel synchronous rotary, the tensioning head includes the cylindrical outer cover body being mutually arranged and fastening core, institute The side for stating outer housing is circumferentially evenly equipped with hole, and after outer housing and fastening core retainer plate set connection, formation, which accommodates, inside tensioning head holds out against The cavity of column holds out against the tension adjusting gear cooperation installation on one end and tensioning head of column, and by tension adjusting gear pair It holds out against column and applies power of different sizes, the column cap that holds out against for holding out against column end is made to stretch out different length from the hole of shell body side surface, The tensioning degree of the material on tensioning head is sleeved on control.

As a kind of the preferred of supplied materials strainer of round plug spot welding device of the present invention:Described hold out against is processed on column There is circular table, is holding out against column cap after being stretched out in the hole of shell body side surface, the inside in hole is withstood on by circular table.

As a kind of the preferred of supplied materials strainer of round plug spot welding device of the present invention:The shell body side surface It is circumferential to be evenly distributed with three holes, and three holes are located on same circumference, set in the tensioning head there are three cavity, each cavity and shell One hole of body side surface is connected to.

As a kind of the preferred of supplied materials strainer of round plug spot welding device of the present invention:It is accommodated in the tensioning head The cavity for holding out against column is involuted by the semicolumn slot I being arranged on outer housing and the semicolumn slot II being arranged on fastening core.

As a kind of the preferred of supplied materials strainer of round plug spot welding device of the present invention:In the outer housing inside Heart position is equipped with cylinder, and opens up threaded hole in center, along outer housing between cylinder and outer housing madial wall Radial setting semicolumn slot I, one end of semicolumn slot I is connected to the hole of shell body side surface, in the other end and the cylinder Threaded hole connection;Described fastening core one end is equipped with and I matched semicolumn slot II of semicolumn slot, and the center for fastening core is set The post holes being located on the cylinder, and by the mating connection of keyway and key body between post holes and cylinder, so that semicircle Column slot I and the composition of semicolumn slot II accommodate the cylindrical cavity for holding out against column.

As a kind of the preferred of supplied materials strainer of round plug spot welding device of the present invention:The tensile force adjustment Mechanism includes the adjusting screw closed with the corresponding threaded holes in the cylinder and spring in cylindrical cavity is arranged, and adjusts spiral shell Nail has cone point, is annular smooth surface between cone point and the screw axial plane II of adjusting screw, the spring one end is withstood on The end of column is held out against, the other end is stretched into across cylinder in threaded hole, and withstands on adjusting screw with the depth of adjusting screw precession Annular smooth surface or cone point the conical surface on.

As a kind of the preferred of supplied materials strainer of round plug spot welding device of the present invention:The stepper motor is logical The side that stepper motor support board is fixed on body support plate is crossed, through-hole is provided in body support plate, and set in through-hole installation The bearing block of bearing, described conductive mandrel one end are connect by shaft coupling with stepper motor output shaft, and the other end is passed through and stretched Go out bearing block, to connect tensioning head, conductive mandrel is connected with the bearing in bearing block, so that the rotation synchronous with bearing of conductive mandrel Turn.

As a kind of the preferred of supplied materials strainer of round plug spot welding device of the present invention:The conduction mandrel stretches out The end face of one end of bearing block is equipped with D-shaped hole, side and is equipped with the screw hole being connected to D-shaped hole, is tensioned first end and is equipped with insertion D-shaped hole D-shaped spindle nose.

As a kind of the preferred of supplied materials strainer of round plug spot welding device of the present invention:Axis in the bearing block It holds there are two setting in an axial direction, the axial plane I of the inner wall of two bearings and the conductive mandrel being inserted into bearing constitutes tight fit, conductive core Axis is equipped with screw axial plane I, installs compression ring on screw axial plane and compression ring is pressed on bearing by fastening nut, fastening nut End face on.

Compared with prior art, the beneficial effects of the invention are as follows:

The present invention can be tensioned supplied materials when spot welding and can be evenly distributed with rotary index automatically in 360 ° of circumference to facilitate spot welding, Substantially increase the working efficiency of the spot welding device of round plug.

Description of the drawings

Fig. 1 is the structural schematic diagram of the present invention;

Fig. 2 is the structural schematic diagram of conductive mandrel in the present invention;

Fig. 3 is the structural schematic diagram that head is tensioned in the present invention;

Fig. 4 is the axial sectional view of Fig. 3, and section plane passes through the central shaft of tensioning head;

Fig. 5 is the radial cross-section of Fig. 3, and section plane passes through the center for holding out against column;

Fig. 6 is the structural schematic diagram for being tensioned outer housing in head;

Fig. 7 is to be tensioned the structural schematic diagram that core is fastened in head;

Fig. 8 is the structural schematic diagram for holding out against column;

Fig. 9 is the structural schematic diagram of adjusting screw;

It is marked in figure:1, stepper motor;2, shaft coupling;3, conductive mandrel;301, screw hole;302, axial plane I;303, screw axial plane I; 304, axial plane II;305, D-shaped hole;4, bearing block;5, it is tensioned head;501, D-shaped spindle nose;6, head fixing screws are tensioned;7, body branch Fagging;8, outer housing;801, semicolumn slot I;802, key body;803, threaded hole;9, column is held out against;901, column cap is held out against;902, ring Shape table top;10, spring;11, core is fastened;1101, keyway;1102, semicolumn slot II;12, adjusting screw;1201, screw axial plane Ⅱ;1202, annular smooth surface;1203, cone point.

Specific implementation mode

Below in conjunction with the accompanying drawings, technical scheme of the present invention is further described by specific embodiment.

As shown, a kind of supplied materials strainer of circle plug spot welding device, including one for being tensioned material It is tensioned head 5, tensioning head 5 is fixed on one end of the conductive mandrel 3 by the driving rotation of stepper motor 1, conductive mandrel 3 and a bearing Bearing fit installation in seat 4, and 3 synchronous rotary of bearing and conductive mandrel, the bearing block 4 are then mounted on body and support Lead to the hole site on plate 7, is fixed by screw, and the stepper motor 1 is fixed on body by stepper motor support board and supports On plate 7;

The tensioning head 5 includes the cylindrical outer cover body 8 being mutually arranged, fastens core 11 and adjusting screw 12, the outer housing 8 Side is circumferentially evenly equipped with hole, and after outer housing 8 and fastening core 11 are arranged connection, it is in 120 ° uniformly distributed that three are formed inside tensioning head 5 Receiving hold out against the circular cylindrical cavity of column 9 and spring 10, each cavity is connected to a corresponding hole, which is by setting It sets what the semicolumn slot I 801 on outer housing 8 was involuted with the semicolumn slot II 1102 being arranged on fastening core 11, holds out against One end of column 9 is to hold out against column cap 901, can be stretched out from the hole of 8 side of outer housing under the effect of the elastic force of spring 10, other end top On spring 10, and in order to avoid being ejected from hole after holding out against 9 stress of column, holds out against and is additionally provided with circular table 902 on column 9, After holding out against column cap 901 and stretching out, for withstanding on the inside of hole, limited to holding out against column 9;

8 inner hub location of the outer housing is equipped with cylinder, and opens up threaded hole 803 in center, in cylinder and Along the radial setting semicolumn slot I 801 of outer housing 8,8 side of one end and outer housing of semicolumn slot I 801 between outer housing madial wall The hole in face is connected to, and the other end is connected to the threaded hole 803 in the cylinder;Described 11 one end of fastening core is equipped with and semicolumn slot I 801 matched semicolumn slots II 1102, the center for fastening core 11 is the post holes being set on the cylinder, and post holes By the mating connection of keyway 1101 and key body 802 between cylinder, so that outer housing 8 and fastening core 11 are interlocked, and by Semicolumn slot I 801 and semicolumn slot II 1102 form cylindrical cavity, will hold out against column 9 and spring 10 is enclosed in cylindrical cavity;

In cylindrical cavity, 10 one end of spring, which is withstood on, to be held out against on column 9, and the other end stretches into threaded hole 803 across the cylinder Interior and adjusting screw 12 matches composition tension adjusting gear, and 12 tip of adjusting screw is cone point 1203, is adjusted The axial plane being threaded on section screw 12 is screw axial plane II 1201, is between cone point 1203 and screw axial plane II 1201 Annular smooth surface 1202 is fastening core 11 and outer housing 8 by keyway 1101, key body 802 and is being fastened and connected to after together, holding out against column 9 It is closed in and is formed by cylindrical cavity body with spring 10, then adjusting screw 12 is mounted in the threaded hole 803, is stretched The cone point of adjusting screw 12 can be withstood on according to the depth of 12 precession of adjusting screw by entering one end of the spring 10 of threaded hole 803 On 1203 conical surface or annular smooth surface 1202, when withstanding on 12 different location of adjusting screw due to spring 10, threaded hole 803 is stretched into Length also can be different, and the elastic force of corresponding spring 10 is also different, hold out against column 9 under the effect of different elastic force, hold out against column cap 901 and stretch The length for going out outer housing 8 is also different, also the material on tensioning head 5 can be given to provide different tensioning degrees, that is to say, that can To control the tensioning degree of material on tensioning head 5 by the precession amount of adjusting screw 12;

It is set in an axial direction in the bearing block 4 there are two bearing, conductive mandrel 3 is inserted into the bearing of bearing block 4, conductive mandrel 3 Axial plane I 302 and bearing block 4 in the inner walls of two bearings constitute tight fit, then by compression ring and be spun on conductive mandrel 3 Fastening nut on screw axial plane I 303 is compressed with bearing face, to ensure that conductive mandrel 3 can be same with the bearing in bearing block 4 Step rotation, the both ends of conductive mandrel 3 are located at the both sides of bearing block 4 and body support plate 7, wherein the axial plane II 304 of one end and Shaft coupling 2 connects, and is fastened by screw, then by the output axis connection of shaft coupling 2 and stepper motor 1, the end face of the other end is set There is D-shaped hole 305, the D-shaped spindle nose 501 on tensioning head 5 can be allowed to be inserted into, and fastened by tensioning head fixing screws 6, be tensioned head in this way 5 are just connected with conductive mandrel 3, and when stepper motor 1 receives rotation control signal, tensioning head 5 also follows rotary index, i.e., will Cylindrical metal container supplied materials rotary index carries out spot welding.

When being adjusted to supplied materials tensile force by the tension adjusting gear adjustment present apparatus, the screw in adjusting screw 12 Axial plane II 1201 matched with threaded hole 803 precession it is shallower when, three 10 bottom surfaces of spring touch the taper of adjusting screw 12 Close to the position of tip on tip 1203, the tension that spring 10 is received at this time is small, and it is also small to hold out against the power that column 9 is received, and holds out against column cap 901 very Cylindrical metal container supplied materials can easily be covered and be attached on tensioning head 5, further, after putting on, inwards by adjusting screw 12 by pine Rotation is deep, and the annular smooth surface 1202 of adjusting screw 12 touches three 10 bottom surfaces of spring at this time, and spring 10 is by maximum tension, top Tight column cap 901 pushes up very tight, will be tensioned the most tight of the cylindrical metal container supplied materials on head 5, can carry out the spot welding of next step Processing, further, after the completion of spot welding, can unscrew adjusting screw 12 backward, three 10 bottoms of spring touch adjusting spiral shell The cone point 1203 of nail 12, the tension that spring 10 is received become smaller, hold out against the power that column 9 is received and also become smaller, cylindrical metal container supplied materials The tensile force release that inner wall is received, can remove the shell for completing spot welding.

The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification For the equivalent embodiment of equivalent variations, as long as be without departing from technical solution of the present invention content, it is right according to the technical essence of the invention Any simple modification, equivalent change and modification made by above example, in the range of still falling within technical solution of the present invention.

Claims (9)

1. a kind of supplied materials strainer of circle plug spot welding device, it is characterised in that:It include the tensioning for being tensioned material Head(5), it is tensioned head(5)It is connected to by stepper motor(1)Drive the conductive mandrel of rotation(3)One end, and with conductive mandrel(3) Synchronous rotary, the tensioning head(5)Including the cylindrical outer cover body being mutually arranged(8)With fastening core(11), the outer housing(8)'s Side is circumferentially evenly equipped with hole, outer housing(8)With fastening core(11)After being arranged connection, in tensioning head(5)Inside forms to accommodate and hold out against Column(9)Cavity, hold out against column(9)One end and tensioning head(5)On tension adjusting gear cooperation installation, and by tensile force tune Complete machine structure is to holding out against column(9)Apply power of different sizes, makes to hold out against column(9)End holds out against column cap(901)From outer housing(8)Side Different length is stretched out in the hole in face, and tensioning head is sleeved on control(5)On material tensioning degree.
2. a kind of supplied materials strainer of round plug spot welding device according to claim 1, it is characterised in that:It is described Hold out against column(9)On be machined with circular table(902), holding out against column cap(901)From outer housing(8)After being stretched out in the hole of side, by Circular table(902)Withstand on the inside in hole.
3. a kind of supplied materials strainer of round plug spot welding device according to claim 1, it is characterised in that:It is described Outer housing(8)Side is circumferentially evenly distributed with three holes, and three holes are located on same circumference, the tensioning head(5)There are three inside setting Cavity, each cavity and outer housing(8)One hole of side is connected to.
4. a kind of supplied materials strainer of round plug spot welding device according to claim 1, it is characterised in that:It is described It is tensioned head(5)Interior receiving holds out against column(9)Cavity by being arranged in outer housing(8)On semicolumn slot I(801)It is being fastened with setting Core(11)On semicolumn slot II(1102)It involutes.
5. a kind of supplied materials strainer of round plug spot welding device according to claim 4, it is characterised in that:It is described Outer housing(8)Inner hub location is equipped with cylinder, and opens up threaded hole in center(803), in cylinder and shell Body(8)Along outer housing between madial wall(8)Radial setting semicolumn slot I(801), semicolumn slot I(801)One end and shell Body(8)The hole of side is connected to, the threaded hole in the other end and the cylinder(803)Connection;The fastening core(11)One end is set Have and semicolumn slot I(801)Matched semicolumn slot II(1102), fasten core(11)Center be set in the cylinder On post holes, and pass through keyway between post holes and cylinder(1101)With key body(802)Mating connection so that semicolumn slot Ⅰ(801)With semicolumn slot II(1102)Composition accommodates and holds out against column(9)Cylindrical cavity.
6. a kind of supplied materials strainer of round plug spot welding device according to claim 5, it is characterised in that:It is described Tension adjusting gear include and the threaded hole in the cylinder(803)Matched adjusting screw(12)And setting exists The spring of cylindrical cavity(10), adjusting screw(12)With cone point(1203), cone point(1203)And adjusting screw (12)Screw axial plane II(1201)Between be annular smooth surface(1202), the spring(10)One end, which is withstood on, holds out against column(9)End Portion, the other end stretch into threaded hole across cylinder(803)It is interior, and with adjusting screw(12)The depth of precession withstands on adjusting screw (12)Annular smooth surface(1202)Or cone point(1203)The conical surface on.
7. a kind of supplied materials strainer of round plug spot welding device according to claim 1, it is characterised in that:It is described Stepper motor(1)It is fixed on body support plate by stepper motor support board(7)Side, body support plate(7)On be provided with Through-hole, and set the bearing block of bearing in through-hole installation(4), the conductive mandrel(3)One end passes through shaft coupling(2)With stepping Motor(1)Axis connection is exported, the other end is through and out bearing block(4), to connect tensioning head(5), conductive mandrel(3)And bearing Seat(4)Interior bearing connection, so that conductive mandrel(3)With bearing synchronous rotary.
8. a kind of supplied materials strainer of round plug spot welding device according to claim 7, it is characterised in that:It is described Conductive mandrel(3)Stretch out bearing block(4)One end end face be equipped with D-shaped hole(305), side be equipped with and D-shaped hole(305)Connection Screw hole is tensioned head(5)One end, which is equipped with, is inserted into D-shaped hole(305)D-shaped spindle nose(501).
9. a kind of supplied materials strainer of round plug spot welding device according to claim 7, it is characterised in that:It is described Bearing block(4)There are two interior bearing is set in an axial direction, the inner wall of two bearings and the conductive mandrel being inserted into bearing(3)Axial plane Ⅰ(302)Constitute tight fit, conductive mandrel(3)It is equipped with screw axial plane I(303), in screw axial plane I(303)Upper installation compression ring And compression ring is pressed on the end face of bearing by fastening nut, fastening nut.
CN201810186463.XA 2018-03-07 2018-03-07 A kind of supplied materials strainer of circle plug spot welding device CN108381071A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810186463.XA CN108381071A (en) 2018-03-07 2018-03-07 A kind of supplied materials strainer of circle plug spot welding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810186463.XA CN108381071A (en) 2018-03-07 2018-03-07 A kind of supplied materials strainer of circle plug spot welding device

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201402693Y (en) * 2009-04-28 2010-02-10 南通市神马电力科技有限公司 Internally tensioning clamp for insulator
CN202071024U (en) * 2011-02-23 2011-12-14 广汽本田汽车有限公司 Round pin insertion type positioning device and tensioning positioning round pin thereof
CN103264913A (en) * 2013-05-16 2013-08-28 东莞市雅康精密机械有限公司 Adhesive tape unwinding reel
US8535071B1 (en) * 2012-04-20 2013-09-17 Schaltbau Gmbh Electrical connector
CN203817430U (en) * 2014-04-11 2014-09-10 南京依维柯汽车有限公司 Floating tensioning device used in small inner holes of shaft tube parts
CN106424850A (en) * 2016-12-09 2017-02-22 无锡银联齿轮传动机械有限公司 Self-centering internally-tensioning drilling device
CN206286581U (en) * 2016-12-21 2017-06-30 宝科机械有限公司 A kind of cutting clamp of carrying roller bearing block

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201402693Y (en) * 2009-04-28 2010-02-10 南通市神马电力科技有限公司 Internally tensioning clamp for insulator
CN202071024U (en) * 2011-02-23 2011-12-14 广汽本田汽车有限公司 Round pin insertion type positioning device and tensioning positioning round pin thereof
US8535071B1 (en) * 2012-04-20 2013-09-17 Schaltbau Gmbh Electrical connector
CN103264913A (en) * 2013-05-16 2013-08-28 东莞市雅康精密机械有限公司 Adhesive tape unwinding reel
CN203817430U (en) * 2014-04-11 2014-09-10 南京依维柯汽车有限公司 Floating tensioning device used in small inner holes of shaft tube parts
CN106424850A (en) * 2016-12-09 2017-02-22 无锡银联齿轮传动机械有限公司 Self-centering internally-tensioning drilling device
CN206286581U (en) * 2016-12-21 2017-06-30 宝科机械有限公司 A kind of cutting clamp of carrying roller bearing block

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