CN101973002A - Left and right tooth lead screw type automatic centering clamp system - Google Patents
Left and right tooth lead screw type automatic centering clamp system Download PDFInfo
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- CN101973002A CN101973002A CN 201010293915 CN201010293915A CN101973002A CN 101973002 A CN101973002 A CN 101973002A CN 201010293915 CN201010293915 CN 201010293915 CN 201010293915 A CN201010293915 A CN 201010293915A CN 101973002 A CN101973002 A CN 101973002A
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- screw mandrel
- lead screw
- jig arm
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Abstract
The invention discloses a left and right tooth lead screw type automatic centering clamp system, which comprises a seat body and a lead screw, wherein two ends of the lead screw are rotationally connected with two ends of the seat body; left and right clamping arms for clamping a workpiece are arranged on the lead screw; the lead screw is connected with the left and right clamping arms by screw threads; the lead screw is divided into a left lead screw and a right lead screw; the screw threads of the left lead screw and the right lead screw have equal thread pitch and opposite rotating directions; and when the lead screw is rotated in the nonuse rotating direction, two movable chucks generate synchronous relative movement or synchronous opposite movement. The system can be automatically adapted to automatic centering of the workpieces of different sizes, has wide application in automatic production lines, particularly has quite obvious application advantage under the condition that the requirement of the central line is higher than that of the outline, and does not need manual metering for correction and centering; and the system has a simple and reasonable structure, is convenient and quick to operate, and has good application and popularization values.
Description
Technical field
The present invention relates to the clamping device of industrial circle, relate in particular to chucking appliance system in the automatic branch of a kind of left and right sides tooth screw mandrel formula.
Background technology
The clamping of current industrial machine, automation equipment etc. or vice are like Fig. 1 or shown in Figure 2, its operating principle is to fix one of them clamping area, move to fixing clamping area by screw rod (Fig. 1), oil cylinder or cylinder promotion another one clamping areas such as (Fig. 2) then, thereby play the purpose of clamping work pieces.But in actual production process, there is a tolerance M in the outline (or clamping area) of going up poor workpiece and allowance below nominal size workpiece, as shown in Figure 3, under such situation, if next procedure is to process (as boring, groove milling etc.) at the center line of workpiece, will bring two workpiece outline tolerance M in the processing of center line into, and cause that M/2 skew (as shown in Figure 4) has taken place in the center line processing of two workpiece.
In order to overcome above-mentioned processing problems, processing factory generally solves by dual mode: the first sees through operating personnel and utilizes the grating digital readout chi or manually beat the actual error that table is measured each workpiece, adjusts and is offset anchor clamps then and make workpiece get back on the spindle centerline.The method has been sacrificed the efficient of current manufacturing procedure; It two is tolerances by control outline (or clamping area), reaches the purpose of control central line deviation.Though the method can remedy some deficiencies that have equipment to exist, operation in the workpiece branch noted earlier has been proposed the higher technological requirement of no practical use.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art, chucking appliance system in the automatic branch of left and right sides tooth screw mandrel formula that a kind of technology is simple, precision is high, flexible to operation is provided.
Purpose of the present invention realizes by following proposal:
Chucking appliance system during a kind of left and right sides tooth screw mandrel formula is divided automatically, comprise pedestal, a rhizoid bar, an at least one end of described screw mandrel and an end of pedestal are rotationally connected, on this rhizoid bar, be provided with the left and right jig arm of holding workpiece, described screw mandrel is threaded with left and right jig arm, described screw mandrel is divided into left side section, right section screw mandrel, and described left side section screw mandrel equates with the pitch of right section wire rod thread, rotation direction is opposite.When with two different direction of rotation rotary screw rods, two active chucks relatively move synchronously or locking phase oppositely moves.
The bottom surface of described left and right jig arm and the guide rail of pedestal are slidingly connected.The two ends of described screw mandrel and the two ends of pedestal are rotationally connected by bearing, and the spindle nose at described screw mandrel two ends is provided with positioning element.
Described bearing adopts the high precision plane bearing; Screw mandrel adopts no gap high precision ball screw mandrel.
Be provided with nut in the described left and right jig arm.Nut is detachable, helps maintenance.
Described jig arm to the opposite, be plane, V-type or semicircle; In case of necessity also can be identical with the workpiece profile of clamping.
The present invention has following advantage and effect with respect to prior art:
(1), chucking appliance system in the automatic branch of left and right sides tooth screw mandrel formula of the present invention, under the turning effort of screw mandrel, left side nut promotes left jig arm and moves, right nut promotes right jig arm and moves, because right jig arm nut and right section screw mandrel 8-1 are different with the thread rotary orientation of left side section screw mandrel, and for two different nuts, the angle R of the rotation that screw mandrel is relative with it equates.One is the left hand screw thread, another right-hand thread, and therefore the direction of motion of two nuts is opposite.Specifically, left and right jig arm moves to the centre synchronously along the guide rail of pedestal when screw mandrel is rotated counterclockwise, thereby promotes left and right sides jig arm clamping work pieces; Left and right jig arm moves to both sides synchronously along the guide rail of pedestal when screw mandrel turns clockwise, thereby makes left and right sides jig arm unclamp workpiece; Because left side section screw mandrel equates with the pitch helical pitch M of right section wire rod thread, rotation direction is opposite, displacement L=M * R/360 so, the nut of left side jig arm and the nut displacement L of right jig arm also must equate, therefore, the present invention is after the workpiece that clamps clamping, no matter the workpiece size can both guarantee the central lines of the center line and the main shaft of workpiece to reach the function in the automatic branch.
(2), the present invention needn't also needn't onlinely measure each workpiece actual size outline (the perhaps clamping area of left and right sides jig arm) the proposition tolerance of workpiece.The present invention is improved to bilateral synchronization-moving clamping mode to monolateral the moving of current old-fashioned anchor clamps (as vice etc.), and it is equal by the displacement of two clamping areas of screw mandrel (screw mandrel of high precision ball particularly is housed) assurance, these anchor clamps practicality, simple and quick has realized simultaneously in the accurate branch automatically of workpiece.
(3), holder part guarantees the durability of clamping area, rail sections guarantees the mobile collimation and the precision of parallel direction thereof, screw mandrel partly guarantees the clamping pressure that provides enough, its key technology is to have used a rhizoid bar, section screw thread about this screw mandrel has, and about the pitch of screw thread of section equate, rotation direction is opposite, promptly, left side section is left-handed (being commonly called as left tooth), and right section is dextrorotation (being commonly called as right tooth).The screw mandrel that pitch equates provides equal displacement for the nut in the jig arm of the left and right sides, when guaranteeing that two jig arm move, keeps identical displacement, thereby in guaranteeing to divide automatically.
(4), the bearing of screw mandrel of the present invention adopts the high precision plane bearing group, screw mandrel adopts the band pretightning force not have gap high precision ball screw mandrel, positioning control accuracy reaches ± 1um in the feasible branch automatically, clamping force, folding stroke are looked different the screw mandrel that processing request is changed different-diameter, different pitch and different lead length, and cooperate the pedestal of different sizes and length to satisfy.The present invention can adapt to the workpiece automatic centerings of different sizes automatically, is widely used on automatic production line, particularly requires than outline under the demanding situation application advantage fairly obvious at center line, do not need manually to beat table is proofreaied and correct and branch in.
(5), the present invention is simple and reasonable, convenient to operation, has practical and popularizing value preferably.
Description of drawings
Fig. 1 is existing screw clamp structure schematic diagram.
Fig. 2 is existing hydraulic pressure or pneumatic type clamp structure schematic diagram.
Fig. 3 is to use the tolerance schematic diagram of the workpiece of existing anchor clamps.
Fig. 4 is to use the work centre line of existing anchor clamps and the schematic diagram of spindle centerline skew.
Fig. 5 is the structural representation of chucking appliance system during the left and right sides of the present invention tooth screw mandrel formula is divided automatically.
Fig. 6 is the structural representation of the present invention when clamping small workpiece.
Fig. 7 is the structural representation of the present invention when clamping big workpiece.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 5, chucking appliance system during the left and right sides of the present invention tooth screw mandrel formula is divided automatically, comprised pedestal 1, screw mandrel 6, the two ends of described screw mandrel 6 are rotationally connected with the two ends of pedestal 1 respectively, the two ends of screw mandrel 6 are rotationally connected with the two ends of pedestal 1 respectively, (one of them end of screw mandrel 6 one of them end and pedestal 1 can certainly being rotationally connected) screw mandrel 6 is provided with the left jig arm 7 of holding workpiece, right jig arm 8, screw mandrel 6 and left jig arm 7, right jig arm 8 threaded engagement connect, screw mandrel 6 is divided into left side section screw mandrel 7-1, right section screw mandrel 8-1, described left side section screw mandrel 7-1 equates with the pitch of the screw thread of right section screw mandrel 8-1, rotation direction is opposite.Promptly the screw thread on the left side section screw mandrel 7-1 is left-handed (being commonly called as left tooth), and the screw thread on the right section screw mandrel 8-1 is dextrorotation (being commonly called as right tooth).
The bottom surface of described left and right jig arm 7,8 and the guide rail 5 of pedestal 1 are slidingly connected, and when left and right jig arm 7,8 moved, closely sliding and fit in the surface of the bottom surface of left and right jig arm 7,8 and guide rail 5, makes left and right jig arm 7,8 beat can not take place.
The two ends of described screw mandrel 6 and the two ends of pedestal are rotationally connected by bearing 2 or a plurality of bearing group.Screw mandrel 6 stretches out the spindle nose 3 outside the pedestal two ends, and spindle nose 3 is the torsion input of screw mandrel 6, can connect outside torsion equipment, and as servo motor or hydraulic motor, perhaps other produce the device of rotary torsion.If screw mandrel 6 adopts the self-locking trapezoidal screw also can import torsion by spanner by manpower.In order to improve the axial and radial accuracy of chucking appliance system, all bearings 2 can adopt high-precision bearing, when less demanding, use similar plain bearing also to belong to these row; Screw mandrel 6 can adopt no gap high precision ball screw mandrel, when less demanding, uses similar common screw mandrel also to belong to these row.
The spindle nose 3 at described screw mandrel 6 two ends is provided with positioning element 4, and this positioning element 4 is used to prevent that screw mandrel 6 from taking place axially or radial displacement.
Nut 7-2 and 8-2 are installed in this left and right jig arm 7,8, after nut 7-2 and 8-2 reach certain degree of wear, only need to change nut, and need not to change left and right jig arm 7,8.
The clamping area shape of left and right jig arm 7,8 can adopt common planar, V-arrangement face or semicircle face etc., but also can make the face of respective shapes according to the special shape of workpiece.
Fig. 6 is the state of left and right jig arm 7,8 when clamping small workpiece, and Fig. 7 is the state when clamping big workpiece.No matter can find out from this two width of cloth figure, be small workpiece or big workpiece, utilize the left and right sides of the present invention tooth screw mandrel formula automatically divide in after the chucking appliance system, the center line of workpiece is coaxial all the time with spindle centerline.
Chucking appliance system during the left and right sides of the present invention tooth screw mandrel formula is divided automatically, under the turning effort of screw mandrel 6, nut 7-2 promotes left jig arm 7 and moves, nut 8-2 promotes right jig arm 8 and moves, because the nut 7-2 of left and right jig arm is different with the thread rotary orientation of 8-2 and right section screw mandrel 8-1, left side section screw mandrel 7-1, and for nut 7-2 and 8-2, the screw thread of left and right section screw mandrel 7-1,8-1 equates with the angle R of its corresponding nut 7-2 and 8-2 rotation.Promptly one is the left hand screw thread, another right-hand thread, and therefore, when screw mandrel 6 was fixed a direction of rotation rotation, the direction of motion of nut 7-2 and 8-2 but was opposite.Such as, when screw mandrel 6 is rotated counterclockwise left and right jig arm 7,8 along the guide rail 5 of pedestal 1 synchronously to middle (relative to) move, thereby promote left and right jig arm 7,8 clamping work pieces; Left and right jig arm 7,8 moves to both sides (in opposite directions) synchronously along the guide rail 5 of pedestal 1 when screw mandrel 6 turns clockwise, thereby makes left and right jig arm 7,8 unclamp workpiece; Because left side section screw mandrel 7-1 equates with pitch (helical pitch) M of right section screw mandrel 8-1 screw thread, rotation direction is opposite, displacement L=M * R/360 so, the nut 7-2 of left side jig arm 7 and the nut 8-2 displacement L of right jig arm 8 must equate, therefore, left and right jig arm 7,8 is behind clamping work pieces, no matter the size of workpiece can both guarantee the central lines of the center line and the main shaft of workpiece to reach the function in the automatic branch.
More particularly, when the clockwise rotation of torsion input spindle nose 3 places input (with reference to figure 5), the nut 7-2 of left side jig arm 7 and left side section screw mandrel 7-1 are left-handed, measuring its moving direction according to left hand is to the right, just move to the centre, the nut 8-2 of right jig arm 8 and right section screw mandrel 8-1 are dextrorotation, and measuring its moving direction according to the right hand is left, promptly moves to the centre; And displacement L1=M1 * R1/360 of moving of the nut 7-2 of left jig arm 7, displacement Lr=Mr * Rr/360 that the nut 8-2 of right jig arm 8 moves (M is that pitch, the R of screw thread is the angle of screw mandrel rotation), because the screw thread of left side section screw mandrel and right section screw mandrel all is made on the same filament bar, so they must equate R1=Rr at the angle of rotation, the pitch of nut 7-2,8-2 and left side section screw mandrel 7-1, right section screw mandrel 8-1 screw thread is the strict M1=Mr that equates when designing and make, and the distance L 1=Lr to intermediary movements of nut 7-2 and 8-2 also equates so.That is to say nut 7-2 how many displacements that advanced during clamping, the nut 8-2 same displacement that also advanced.
The foregoing description only is preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other are any not to deviate from change, the modification done under spiritual essence of the present invention and the principle, substitute, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (8)
1. chucking appliance system during a left and right sides tooth screw mandrel formula is divided automatically, comprise pedestal, screw mandrel, an at least one end of described screw mandrel and an end of pedestal are rotationally connected, screw mandrel is provided with the left and right jig arm of holding workpiece, described screw mandrel is threaded with left and right jig arm, it is characterized in that: described screw mandrel is divided into left side section, right section screw mandrel, and described left side section screw mandrel equates with the pitch of right section wire rod thread, rotation direction is opposite.
2. chucking appliance system during the left and right sides according to claim 1 tooth screw mandrel formula is divided automatically, it is characterized in that: the bottom surface of described left and right jig arm and the guide rail of pedestal are slidingly connected.
3. chucking appliance system during the left and right sides according to claim 2 tooth screw mandrel formula is automatically divided is characterized in that: an end of described screw mandrel and an end of pedestal are rotationally connected by bearing, and the spindle nose of described screw mandrel end is provided with positioning element.
4. chucking appliance system during the left and right sides according to claim 3 tooth screw mandrel formula is divided automatically, it is characterized in that: described bearing is a high-precision bearing.
5. chucking appliance system during the left and right sides according to claim 4 tooth screw mandrel formula is divided automatically, it is characterized in that: described screw mandrel is a no gap high precision ball screw mandrel.
6. chucking appliance system during the left and right sides according to claim 4 tooth screw mandrel formula is divided automatically is characterized in that: be provided with nut in the described left and right jig arm.
7. chucking appliance system during the left and right sides according to claim 6 tooth screw mandrel formula is automatically divided is characterized in that: described left and right jig arm to the opposite, be plane, V-arrangement, semicircle or any one.
8. chucking appliance system during the left and right sides according to claim 6 tooth screw mandrel formula is automatically divided is characterized in that: described left and right jig arm identical with the profile of workpiece to the opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010293915 CN101973002A (en) | 2010-09-26 | 2010-09-26 | Left and right tooth lead screw type automatic centering clamp system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010293915 CN101973002A (en) | 2010-09-26 | 2010-09-26 | Left and right tooth lead screw type automatic centering clamp system |
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| Publication Number | Publication Date |
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| CN101973002A true CN101973002A (en) | 2011-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010293915 Pending CN101973002A (en) | 2010-09-26 | 2010-09-26 | Left and right tooth lead screw type automatic centering clamp system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102729080A (en) * | 2012-07-09 | 2012-10-17 | 上海三一精机有限公司 | Workpiece clamping device and roller scraper |
| CN103406788A (en) * | 2013-08-21 | 2013-11-27 | 芜湖奕辰模具科技有限公司 | L-shaped clamp for milling machine |
| CN104907858A (en) * | 2015-06-29 | 2015-09-16 | 金世金属制品（吴江）有限公司 | An automatic centering and drilling device for a forging part |
| CN104942616A (en) * | 2014-03-26 | 2015-09-30 | 中国有色（沈阳）冶金机械有限公司 | Irregular frame geometrical form machining positioning centering special jig |
| CN105291125A (en) * | 2015-10-28 | 2016-02-03 | 中国矿业大学 | Screw driving hand mechanism of robot and clamping method |
| CN105927637A (en) * | 2016-06-15 | 2016-09-07 | 宁波方太厨具有限公司 | Positioning assembly mechanism enabling tolerance to be uniformly divided on two sides |
| CN107803472A (en) * | 2017-11-08 | 2018-03-16 | 马鞍山市万鑫铸造有限公司 | A kind of steel ingot casting device |
| CN108000010A (en) * | 2017-12-08 | 2018-05-08 | 柳州通亿汽车配件制造有限公司 | The transfer device of automobile bottom diskware welding |
| CN108818031A (en) * | 2018-06-21 | 2018-11-16 | 谢豪杰 | A kind of radial drilling machine positioning fixture and its operating method |
| CN109011606A (en) * | 2018-08-29 | 2018-12-18 | 杨雪锋 | A kind of recreation wind tunnel ventilation apparatus Anti-inclining equipment |
| CN110176830A (en) * | 2019-05-29 | 2019-08-27 | 中国电子科技集团公司第十六研究所 | A kind of superconduction flywheel head shaft positioning device and its application method |
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| CN2657852Y (en) * | 2003-11-18 | 2004-11-24 | 丁樟金 | Multifunction open pliers |
Non-Patent Citations (1)
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| 《机械工程师》 20080731 韩道权、杨敬源、崔慧娟 一种中心对中式管具夹紧装置 67-68 1-8 , 2 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102729080B (en) * | 2012-07-09 | 2015-12-09 | 三一集团有限公司上海分公司 | Workpiece clamping device and scrape roller |
| CN102729080A (en) * | 2012-07-09 | 2012-10-17 | 上海三一精机有限公司 | Workpiece clamping device and roller scraper |
| CN103406788A (en) * | 2013-08-21 | 2013-11-27 | 芜湖奕辰模具科技有限公司 | L-shaped clamp for milling machine |
| CN104942616B (en) * | 2014-03-26 | 2018-01-16 | 中国有色（沈阳）冶金机械有限公司 | A kind of irregular frame geometrical body processing positioning centering special fixture |
| CN104942616A (en) * | 2014-03-26 | 2015-09-30 | 中国有色（沈阳）冶金机械有限公司 | Irregular frame geometrical form machining positioning centering special jig |
| CN104907858A (en) * | 2015-06-29 | 2015-09-16 | 金世金属制品（吴江）有限公司 | An automatic centering and drilling device for a forging part |
| CN105291125A (en) * | 2015-10-28 | 2016-02-03 | 中国矿业大学 | Screw driving hand mechanism of robot and clamping method |
| CN105927637A (en) * | 2016-06-15 | 2016-09-07 | 宁波方太厨具有限公司 | Positioning assembly mechanism enabling tolerance to be uniformly divided on two sides |
| CN105927637B (en) * | 2016-06-15 | 2018-03-13 | 宁波方太厨具有限公司 | The positioning assemble mechanism for dividing equally tolerance both sides |
| CN107803472A (en) * | 2017-11-08 | 2018-03-16 | 马鞍山市万鑫铸造有限公司 | A kind of steel ingot casting device |
| CN108000010A (en) * | 2017-12-08 | 2018-05-08 | 柳州通亿汽车配件制造有限公司 | The transfer device of automobile bottom diskware welding |
| CN108818031A (en) * | 2018-06-21 | 2018-11-16 | 谢豪杰 | A kind of radial drilling machine positioning fixture and its operating method |
| CN109011606A (en) * | 2018-08-29 | 2018-12-18 | 杨雪锋 | A kind of recreation wind tunnel ventilation apparatus Anti-inclining equipment |
| CN110176830A (en) * | 2019-05-29 | 2019-08-27 | 中国电子科技集团公司第十六研究所 | A kind of superconduction flywheel head shaft positioning device and its application method |
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Open date: 20110216 |