CN2900042Y

CN2900042Y - Four-jaw automatic centring chuck

Info

Publication number: CN2900042Y
Application number: CN 200620042380
Authority: CN
Inventors: 严宝华; 李广普
Original assignee: KAMUDANKE SEMICONDUCTOR CO Ltd SHANGHAI
Current assignee: KAMUDANKE SEMICONDUCTOR CO Ltd SHANGHAI
Priority date: 2006-06-02
Filing date: 2006-06-02
Publication date: 2007-05-16
Anticipated expiration: 2016-06-02

Abstract

The utility model relates to a frock clamp for mechanic processing, in particular to a clamping chuck for processing lathe and machine towards the square stick workpiece. A clamping chuck 1 is ladder plate-type and a big chuck is square shaped with four sides provided with a lever-type press plate 1a respectively. A ladder-type small pinacoid at the outer side of the clamping chuck 1 is round screw surface. A locking thrust plate 2 is round cirque shaped with the center as inner screw through hole. The screw matches with the outer screw of the clamping chuck. The peripheral of a locking thrust plate 2 is assumed as taper surface which balances out with inner side of outer end of the press plate 1 a. When rotating the locking thrust plate 2 and lifting the press plate 1 a by the outer taper, the other end of the press plate 1 a is pressed down to axle under the function of level and locked four sides of the square workpiece. The utility model is characterized in simple structure, convenient operation, reliable clamping and easy to manufacture. The axle-direction distance of the chuck is short but compact in structure which could make full use of the efficient working length of the lathe. With same principle, the utility model is applicable to the multi-jaw chuck with three or more than three jaws.

Description

A kind of four paws automatic centering chuck

(1) technical field

The utility model is a kind of machining frock clamp, particularly relate to similar in car, mill processing a kind of chuck of clamping work pieces.

(2) background technology

Known, in car, mill processing, circumference smear metal or sanded treatment need be carried out in surface to workpiece, reach certain diameter dimension or fineness requirement, at this moment, must be with workpiece two ends centering, clamping, end rotation then, the rotation of drive workpiece is processed processing by cutter or emery wheel to the surface of the work periphery.

Especially in silicon solar cell processing, this requirement is arranged more.

Accept to shine upon for maximum area ground, absorb the energy, the semi-conductor silicon chip that solar energy converts electric energy to generally is processed into square.In process, at first polycrystalline silicon material is processed into the pole of monocrystalline silicon, the blank pole is through cutting off, being reprocessed into square rod after round as a ball, and square rod section back has just become for ease of the solar energy and semiconductor silicon chip of arranging.

Silicon materials are a kind of very expensive exotic materials, in order to make full use of silicon materials, general work in-process is not cut into square square rod with the pole after round as a ball, in order to avoid the rim charge of excision is too big, cost is too high, promptly solar silicon wafers is not processed into complete square in shape, but is roughly four jiaos of square, square circular arcs that still keep about about 15 degree, through designing and calculating and test, such structure can absorb solar light in big efficient ground, but and the manufacturing cost your place of getting back reduces, cost performance is higher.

In the processing, the circular single crystal silicon rod that draws in the single crystal growing furnace is made up of the concentric circles that numerous diameter slightly changes, and four ribs that obviously protrude are arranged.Silicon single crystal rod being cut into before the side silicon wafer of thickness below 0.3 millimeter, the silicon single crystal rod barreling need be become the standard pole of given size, and cut the square rod that becomes given size behind four limits.Make the raw material of regeneration pulling monocrystal silicon in order to make full use of corner blanking behind the butt, and the discharging of grinding waste material when reducing barreling, manufacturing technique requirent is cut into square rod with the pole blank earlier, and then four remaining circular arc edged surfaces are carried out the processing of sizing rounding, process program like this, the working face of barreling is very little, four arc chord angles only, and the waste material of barreling is few, less wastage, the waste disposal amount is also few, and that preceding road is cut into the following rim charge of square rod is big relatively, and following rim charge availability has improved.

But so process program requires the workpiece geometric center of twice processing in front and back of butt and barreling four circular arcs to be consistent, and is consistent with the central axis of machining tool, requires sternlyer, otherwise will influence product quality, causes bar to scrap or waste.

The clamping centering centering frock at square rod rounding two ends must before four square limits, road be that benchmark is determined geometric center, and can clamp square rod synchronously, be consistent with the central axis of machining tool, carry out rounding processing again.

Prior art, the anchor clamps of square rod are made up of two discs, and the plane of disk and square rod workpiece offset, a ball hole is offered at the back of disk, two push rod heads of jig are spherical, withstand the ball hole, and two disk clamps can be done trickle adjustment with the angle of square rod workpiece end face.

Because the anchor clamps of prior art are plate shaped, no reference point and anchor point on flat board, make the center at workpiece two ends and the central axis of machining tool be consistent, must assist reference measure instrument tool by on lathe, laying one in addition when adjusting centering, rotational workpieces repeatedly, test surfaces position, correct adjustment repeatedly, the adjustment operation extremely bothers, difficulty, time-consuming, and specification requirement is higher, and the high adjustment precision of difficult acquisition.

Because it is less that this device clamps the change in size of object, only be automatic centering centering, clamping action, therefore, if the three-jaw on the use lathe, multijaw chuck, the tight scope of radially adjusting of this type of chuck jaw clip is bigger, the complex structure of mechanism, the cost height, and the axial length of lathe chuck is bigger, the effective length of machine tooling part reduces, is restricted relatively, has lost the working ability of length aspect, and in silicon cell processing, be the length of processing work of as far as possible to extend, can improve stock utilization and working (machining) efficiency as far as possible.

(3) summary of the invention

The purpose of this utility model intends providing a kind of being installed simply, needn't manually adjust the automatic accurate centering centering of energy, the frock clamp that the workpiece geometric center of twice processing in front and back of assurance butt and barreling and the central axis of machining tool are consistent.

The purpose of this utility model so realizes.

A kind of four paws automatic centering chuck comprises chucking dish and locking push-plate, and two parts concentric screws the form combination with screw thread.

The chucking disk component is the ladder plate-like, in the perforate of chucking dish outer side center, matches for two push rods with lathe, and can guarantee that the center of workpiece is consistent with the lathe pivot.The inboard of chucking dish is the plane, and extruding contacts with the end face of square rod workpiece; The inboard deep bid of chucking dish is quadrangle, on four limits, promptly four lever pressing plates are set with the contact position of corresponding four faces of square rod workpiece, pressing plate can be around the pivot pin swing of lever, the position of pivot pin is on deep bid four limits of chucking dish, the direction of pivot pin is consistent with the sideline, four limits of chucking dish, therefore, when the inner of pressing plate, during promptly with the perk of workpiece contact jaw, the square rod workpiece can be put into pressing plate easily, when the perk of pressing plate outer end, pressing plate is securely with Work-sheet pressing, and when whole chuck rotated, pressing plate all around can drive workpiece and rotate together.The little axial plane of the outer side steps of chucking dish is an external screw thread, matches with internal thread in the locking push-plate axis hole.

The locking push-plate is annular, circle ring center is a screwed hole, the surface, outer ring is a taper seat, with chucking dish concentric, both are connected with thread forms, the rotational lock push-plate can make the locking push-plate make axially advance and retreat on the chucking dish, the periphery of locking push-plate is tapered, the microcephaly of taper is coiled deep bid towards chucking, and the inner face in the outside of four block pressur plates around the conical surface and the chucking dish deep bid offsets, therefore, when the rotational lock push-plate made that locking push-plate and chucking dish deep bid card are pressed close to, the periphery conical surface of locking push-plate lifted the pressing plate around the chucking dish gradually, and the other end of pressing plate around the chucking dish deep bid, because the effect of lever is depressed toward axis direction, also just compresses, four faces of square rod workpiece have been clamped.Otherwise when the locking push-plate is withdrawed from rotation, the periphery conical surface of locking push-plate breaks away from the pressing plate around the chucking dish gradually, the outside of pressing plate lose to radially lift power after, inboard do not had the restraining force that compresses yet, and the square rod workpiece is no longer compressed, and can unload workpiece that the processing operation is finished.

Because the locking push-plate is annular, four block pressur plates around the rotational lock push-plate can lift synchronously, the square rod workpiece around compressing synchronously, therefore the mode that compresses can reach the purpose to the workpiece automatic centering.

Work in-process requires not too tight occasion to clamping accuracy, and a kind of more convenient easy modification structures can be arranged.For four lever pressing plates in four limits of reaching the chucking dish purpose around the axis swing of lever, can offer through hole at the plate face of pressing plate, bolt penetrates through hole and screws in four limits that are fixed on chucking dish deep bid again, the diameter of through hole is greater than the diameter of bolt, bolt head and pressing plate contact-making surface are sphere, make pressing plate in bolt, can swing, can swing up and down around sideline around the chucking dish, when outside locking push-plate advances, the periphery conical surface of locking push-plate can play the outer end of lifting pressing plate, depresses inner effect.So structure has been save the structure that axle bed and pivot pin are set on four limits of chucking dish, and it is fairly simple to make chuck make, it is also easier to adjust pressing plate with bolt, can play identical pressuring action again, and advantage is more obvious, certainly, be to compress the not too high occasion of required precision.

The technical program is simple in structure, and is easy to operate, and reliable clamping is easy to manufacture.Therefore the axial distance of present technique chuck is very short, and compact conformation can make full use of and bring into play effective active length of lathe, improves the working (machining) efficiency of lathe.Same principle, the version of the technical program can be applicable to the multijaw chuck more than or equal to three-jaw, and routine three-jaw, five pawls, six pawls etc. play clamping and the automatic centering effect equally.

(4) description of drawings

Fig. 1 is that a kind of four paws automatic centering chuck that the utility model proposes is at the structural representation that clamps the square rod work status;

Fig. 2 is outer, interior two side views of the chucking disk component of a kind of four paws automatic centering chuck that the utility model proposes;

Fig. 3 is outer, interior two side views of the locking push-plate parts of a kind of four paws automatic centering chuck that the utility model proposes;

Fig. 4 is the view of the medial surface after the simple and easy distortion of a kind of four paws automatic centering chuck that the utility model proposes;

Fig. 5 is at the structure partial schematic diagram that clamps the square rod work status after the simple and easy distortion of a kind of four paws automatic centering chuck that the utility model proposes;

Fig. 6 is that the prior art chuck is at the structural representation that clamps the square rod work status;

Among the figure, 1. chucking dish 2. is locked push-plates

1a. pressing plate 1b. axle bed 1c. pivot pin 1d. bolt

(5) specific embodiment

Below describe technical solutions of the utility model in detail at accompanying drawing.

Embodiment one.

A kind of four paws automatic centering chuck comprises chucking dish 1 and locking push-plate 2 two parts composition.

Chucking dish 1 is the ladder plate-like, and the outer side center of chucking dish 1 is offered centre bore, assembles for two push rods with lathe, guarantees that the center of workpiece is consistent with the lathe pivot.The inboard of chucking dish 1 is the plane, contacts extruding with the end face of square rod workpiece; The deep bid of chucking dish 1 is a quadrangle, with the contact position of corresponding four faces of square rod workpiece four lever pressing plate 1a are set, pressing plate 1a can be around the pivot pin 1c swing of lever, the position of pivot pin 1c is on four limits of chucking dish, the direction of pivot pin 1c is consistent with the sideline, four limits of chucking dish deep bid, therefore, the inner as pressing plate 1a, when being the working end perk, the square rod workpiece can be put into pressing plate 1a easily, and when the perk of pressing plate 1a outer end, pressing plate 1a can be securely with Work-sheet pressing, when chuck rotated, pressing plate 1a all around can drive workpiece and rotate together.The little axial plane of chucking dish 1 outer side steps is an external screw thread, matches with the internal thread of locking push-plate axis hole.

Locking push-plate 2 is disc, screwed hole of centre, periphery is a taper seat, coil 1 concentric with chucking, be connected with thread forms, rotational lock push-plate 2 can make locking push-plate 2 make axially advance and retreat on chucking dish 1, the microcephaly of locking push-plate 2 periphery tapers is coiled 1 deep bid card towards chucking, and the inner face of four block pressur plate 1a outer ends around the conical surface and the chucking dish 1 offsets, therefore, when rotational lock push-plate 2 makes locking push-plates 2 and chucking coil 1 card when pressing close to, the periphery conical surface of locking push-plate 2 lifts the pressing plate 1a around the chucking dish 1 gradually, and the other end of pressing plate 1a around the chucking dish 1 because the effect of lever is depressed toward axis direction, also just compresses, four faces of square rod workpiece have been clamped.Otherwise, withdrawing from locking push-plate 2 when rotation, the periphery conical surface of locking push-plate 2 breaks away from the pressing plate 1a around the chucking dish 1 gradually, the outside of pressing plate 1a lose radially lift power after, inner do not had the restraining force that compresses yet, and the square rod workpiece is no longer compressed, and can unload workpiece that the processing operation is finished.

Embodiment two.

Work in-process requires not too tight occasion to clamping accuracy, for four limits, four lever pressing plates 1a of reaching the chucking dish purpose around the axis swing of lever, plate face at pressing plate 1a is offered through hole, bolt 1d penetrates through hole and screws in and be fixed on four limits that chucking coils 1 deep bid, the diameter of through hole is greater than the diameter of bolt 1d, the contact-making surface of the bolt head of bolt 1d and pressing plate 1a is spherical in shape, make pressing plate in bolt, can swing, play pressing plate 1a equally and can coil the perk up and down of 1 four limits around chucking, depress effect, when outside locking push-plate 2 advances, the inner is depressed in the outer end that the periphery conical surface of locking push-plate 2 lifts pressing plate 1a, clamps the square rod workpiece.So structure has been save the structure that axle bed 1b and pivot pin 1c are set on four limits of chucking dish 1, and it is fairly simple to make chuck make, and saves cost, and the technical program is simple in structure, and is easy to operate, and reliable clamping is easy to manufacture.Therefore the axial distance of present technique chuck is very short, and compact conformation can make full use of and bring into play effective active length of lathe.

Claims

1. a four paws automatic centering chuck is characterized in that, described chuck comprises chucking dish (1) and (2) two parts of locking push-plate, and two parts are made coaxial combination with axial thread,

Chucking dish (1) is coaxial ladder plate-like, the outer side center perforate of chucking dish (1), the inboard of chucking dish (1) is the plane, the deep bid of chucking dish (1) is quadrangle, and four limits are provided with lever pressing plate (1a), and pressing plate (1a) can be around lever pivot pin (1c) swing, the position of pivot pin (1c) is on four limits of chucking dish deep bid, the direction of pivot pin (1c) is consistent with the sideline, deep bid four limit of chucking dish, and the little axial plane of the outer side steps of chucking dish (1) is the external screw thread face

Locking push-plate (2) is annular, circle ring center is an internal thread through hole, the external screw thread of its screw thread and chucking dish (1) matches, the outer ring of locking push-plate (2) is a taper seat, the microcephaly of taper is towards the platter surface of chucking dish (1), and the inner face of the conical surface and chucking dish (1) pressing plate (1a) outer end all around offsets.

2. a four paws automatic centering chuck is characterized in that, described chuck comprises chucking dish (1) and (2) two parts of locking push-plate, and two parts are made coaxial combination with axial thread,

Chucking dish (1) is coaxial ladder plate-like, the outer side center perforate of chucking dish (1), the inboard of chucking dish (1) is the plane, and the deep bid of chucking dish (1) is quadrangle, and four limits are provided with lever pressing plate (1a), plate face at pressing plate (1a) is offered through hole, bolt (1d) penetrates deep bid four limits that through hole is fixed on chucking dish (1), and the diameter of through hole is greater than the diameter of bolt (1d), and bolt (1d) is a sphere with pressing plate (1a) contact-making surface, the little axial plane of the outer side steps of chucking dish (1) is the external screw thread face

3. a kind of four paws automatic centering chuck according to claim 1 and 2 is characterized in that the peripheral edge number of chucking dish (1) is more than or equal to 3, and the quantity of pressing plate (1a) is identical with the peripheral edge number of chucking dish (1).