Ball guide screw applies in the type selecting on pharmacy sheeting machine

Content summary: Ball guide screw is the crucial part in industrial automation drive, can improve transmission efficiency effectively, promote fixed position precision, save operation time. The article sets out from applied angle, undertook an analysis to the drive structure of ball guide screw, to a few keys of ball guide screw parameter undertook demonstrative, the effective demand of mature client, to type selecting of ball guide screw each important document undertook detailed computation and analysis, choose the ball guide screw that matched tall sex price to compare contented use requirement. 1 preface rises as the industrial automation degree of modern production, the client is right automation, efficient the requirement with high accuracy drive is increasing. The transmission way of a lot of traditions already did not fit the need of current property, the drive of this kind of high accuracy produces ball guide screw article in the market demand is bigger and bigger. Ball guide screw is tool machine and accurate machinery go up most the transmission cell that often uses, its are main the function is move whirligig changeover into linear, or oppose torque changeover Fu active force into axial, hold a high accuracy, reversibility and efficient characteristic concurrently at the same time. The clearance that pill tool set adjusts on machine of sheeting of traditional pharmacy industry moves an operation basically for the hand, adjust precision difference, efficiency is low, the production that restricted a pharmaceutical factory badly is produced can, the desire that the client changes this structure is very strong. To design engineer, how to choose cooperate comfortable fixed position precision, choose the ball guide screw that matchs tall sex price to compare, be very important and imperative job. The main demand 　 of 2 guide screw (I) athletic way: Perpendicular direction 　 (Ⅱ ) laden size F: Without extra pressure state: Muscularity of the pressurization outside 　 of 20 ～ 30KG is small: 1000KG 　 　 (Ⅲ ) traversal speed Nm: Divide evenly fast move, 10rpm 　 　 (Ⅳ ) P of guide screw lead: 5mm 　 　 (Ⅴ ) precision requirement E: Deviation ＜ is accumulated inside 50mm 0.

02mm 　 　 (Ⅵ ) effective journey L: The structure is main before structural client before 3 clients of 120mm 　 　 use a hand to move means to have dynamical drive and fixed position. The working principle of the orgnaization: Contain in the one aspect of the matter of worm handwheel, rotational handwheel drives worm to turn, drive helical gear by worm again, this helical gear issues two end to be restricted on axial, can make whirligig only, and it is an organic whole with nut couplet, pass the whirligig of helical gear and nut, drive what the diameter is M22mm to rise fall lever makes the linear motion that rise or drops. Motion arrives after the craft position of the requirement, litre fall lever with respect to jib, the movement that press medicine begins to undertake, between date of departure of the carry that press medicine, the greatest pressure of drum is 1 ton. And when should pressing medical breed to need to change, again the hand is moved adjust litre fall to lever rises or do sharp movement to arrive downward another labour. From the analysis on athletic mechanism, this orgnaization design is reasonable, can satisfy use requirement. But insufficient point is very obvious also: (1) rely on to be adjusted artificially rise or drop distance, automation rate is very low. (2) outside assist of treatment litre fall lever and helical gear are the product that be not mark, production precision assures hard. (3) work efficiency is low. Because pill noumenon is smaller, the thickness precision of the requirement is taller, the test that can pass for many times only will undertake adjustment. 4 improve a requirement to be based on above existence to be not worth, class of client expectation hoist, the operation is more agile and quick, achieve the following requirement: (1) of hoist flexible productivity, answer the pill of different specifications to produce quickly. (2) promote high-key whole efficiency, reduce experiment number, raise successful rate. (3) ≤ of requirement of fixed position precision 0.

The 5 structures after improving are aimed at 02mm 　 　 the client's improvement asks, the client undertook adjustment to the structure: Abandon the hand uses operation device, complete automation operates instead and pilot plant, realize more accurate fixed position requirement at the same time. For this, the client undertook a structure improve to equipment. Athletic mechanism analyses: Servo electric machinery is passed after improving 11 drive join 15, repass key and nut the join of 3, drive nut to rotate, nut edge axial by spacing, cannot make linear motion, drive ball guide screw thereby 8 make linear motion. Achieve then adjust the clearance of gyro wheel and pressing plate, dominate the end of pill thickness. The advantage of above structure is very clear also: (1) drive movement of ball guide screw through servo electric machinery, replace a hand to shake annulus, the operation goes to the lavatory simply, automation degree gets promotion. (2) through choosing guide screw of high accuracy ball, achieve taller transmission precision. (3) answer different pill, comparable quick achieve manufacturing demand, flexible change get strengthening. The main difficult point that the structure improves depends on: (1) the space that assembles guide screw is narrower. (2) rotate unlike traditional guide screw, nut makes linear motion; The client asks nut rotates, guide screw makes linear motion. The 　 of type selecting computation of 6 ball guide screw 6.

The affirmatory 　 1) of bear of axial of 1 ball guide screw is basic and rated dead load Co is defined namely the bear with guide screw dormant axial, it is to show guide screw bears guide screw groove and ball bearing contact are nodded (namely nut and guide screw axis) 0 what the summation of the permanent deflection of permanent deflection and ball bearing itself achieves ball bearing diameter.

The force of 01% the biggest axial when. This bear value is basic and rated dead load namely. When 2) of Nextpage 　 　 suffers force analysis not to have outside force state, axial load is 30KG, namely 30kgf 　 brings to bear on when outside force, axial load is 1 ton, namely 1000kgf 　 works actually considering equipment state, ball guide screw is moving condition (adjust namely when space size) suffer effect of gravity of laden platform oneself only, this weight is very little, but need not consider. Bring to bear on when outside force, because outside force is larger, need to consider mainly, right now guide screw is in static condition, consequently we consult the rated dead load of ball guide screw is worth can. The correspondence of make choice of of form of 3) screw cap brings to bear on operating mode of 1000kgf outside force, example of referenced ball guide screw, can check corresponding diameter 25mm, lead 5mm, ball bearing circumfluence encircles number 4, the rated dead load of ball guide screw is worth for 4100kgf. If express 1 medium data,be shown. Express 　 of Cj of ＞ of Co of 　 of 　 of Co=4100kgf Cj=1000kgf of 1 　 　 from this, guide screw of ball of series of preliminary and optional R25-5T4. 6.

2 ball guide screw gets power safety factor gets power when the static state only because of ball guide screw, want to suffer power volume to certain safe surplus can satisfy a requirement only, this safe surplus S is recommended choose 3 times above. Formula undertakes business accounting under the basis: S=Co/Cj 　 carries relevant data, have: S=Co/Cj=4100/1000=4.

Guide screw of ball of series of R25-5T4 of 3 　 reason satisfies 1 ＞ expect use demand. 6.

The affirmatory client of length of 3 ball guide screw is in what axial of ball guide screw moves to adjust a distance smaller, do not exceed 120mm, consider the length of nut oneself at the same time, length of client guide screw is chosen for 183mm. 6.

The precision of the affirmatory ball guide screw of precision of 4 balls guide screw can decide according to expressing 2 medium data. The effective journey that expresses 2 　 client is in 120mm less than, the accumulation of the requirement lead deviation is in 0.

02mm less than. According to above form, choose accuracy class C4 to be able to satisfy use requirement. 6.

Of model of 5 ball guide screw decide the business accounting on put together and precision affirm finally, regulation of encode of model of ball guide screw is amounted to in the basis, the model of final ball guide screw is certainly: R25-5T4-FSI-183-183-C4. 7 last words upgrade in the orgnaization of this pill machine in improving a project, basically assisted a client to undertake to former incorporated hand-operated device automation is improved, realized the client's anticipation to ask; Undertook labor to the type selecting of ball guide screw, computation at the same time, selected right product. Succeed through this structure remodel, the client goes up in follow-up groovy type, reference this case changes to manipulate a structure for the automation of drive of ball guide screw entirely. Believe as domestic automation level rise, ball guide screw product of drive of this kind of high end will be gone to by more and more application each industry, farther contented client is right the demand of high speed, high spirit. CNC Milling