CN2794686Y - Eccentric wheel roller feeding mechanism for ring roller - Google Patents

Abstract

The utility model relates to an eccentric wheel roller feeding mechanism for a ring roller, which comprises a power machine (24), a speed reducer (23), a driving device and a slide block (18), wherein the power machine is connected to the speed reducer, an output shaft of the speed reducer is connected to the driving device which is connected to the slide block; a return oil cylinder (26) is fixed to a machine frame (25), and a piston rod is connected to the slide block (18); the driving device also comprises an eccentric wheel (21) and a roller (20), wherein the roller is fixed to the slide block (18) and is contacted and connected with the eccentric wheel (21), the eccentric wheel (21) is connected to an eccentric shaft (30) in a key-type, the eccentric shaft (30) is fixed to the machine frame (25) through a support (22), and the eccentric shaft (30) is connected to the speed reducer (23); the contour of the working portion of the eccentric wheel is a circular arc line, and the circle center and the return center of the eccentric wheel have eccentric distance; the non-working portion of the contour of the eccentric wheel is the circular arc line; the radius of the return pole in the inward concave month segment shape is smaller than the radius of a base circle. The eccentric wheel roller feeding mechanism for a ring roller has continuous speed regulation and no fluctuation, low cost and long service life.

Description

The eccentric wheel roller feed mechanism of Ring Rolling Machine

Affiliated technical field

The utility model patent relates to a kind of eccentric wheel roller feed mechanism of Ring Rolling Machine.Ring Rolling Machine belongs to forging equipment, and Ring Rolling Machine claims staving press again, and in the spreading process, the ring base is partly, plastic deformation continuously, and its short time set district is very little, thereby has reduced the deformation force that needs greatly.

Background technology

Facts have proved Ring Rolling Machine, the particularly reasonability and the stability of the driving feeding strength of cold-rolling ring rolls and speed are directly connected to the precision of annular forging piece, in the different phase of spreading the feed speed that adapts should be arranged, requirement can make things convenient in speed governing, responds rapidly and be in operation not fluctuate.

Cold-rolling ring rolls extensively adopts oil cylinder in earlier stage, realizes feeding with the hydraulic-driven master slider, by electro-hydraulic proportional valve control speed governing.By the electro-hydraulic proportional valve characteristic curve as can be known, hydraulic oil, the proportioning valve variations in temperature can cause the proportioning valve changes in flow rate, voltage and flow are not complete linear relationship, and the range of instability is arranged, and the cleanliness of hydraulic oil degree is difficult to keep, this all will cause the ram speed instability, and precision is out of control.Adopt AC servo motor and decelerator to link in recent years again, promote master slider through transmission device (ball-screw) and realize feeding, though got rid of the hydraulic feed shortcoming, operating mode makes moderate progress, but is subjected to the restriction in load capacity and service life, and the cost height, difficult in maintenance, be difficult to repair.

Summary of the invention

The purpose of this utility model promptly produces thus, proposes a kind of eccentric wheel roller feed mechanism of Ring Rolling Machine, solves feed mechanism speed governing fluctuation, manufacturing cost height, the technical problem that the life-span is low.

For achieving the above object, the technical scheme that the utility model is taked is: the eccentric wheel roller feed mechanism of Ring Rolling Machine, comprise engine, decelerator, transmission device and slide block, engine is connected with decelerator, reducer output shaft is connected with transmission device, transmission device is connected with slide block, the backhaul oil cylinder is fixed on the frame, its piston rod is connected with slide block, wherein transmission device also comprises eccentric wheel, and roller, roller are fixed on the slide block, be connected with the eccentric wheel contact, eccentric wheel is connected with key with camshaft, and camshaft is fixed on the frame by bearing, and camshaft is connected with decelerator, in this mechanism, the contour curve of eccentric wheel working portion is a circular arc line, and the center of circle of circular arc line and the eccentric wheel centre of gyration have an eccentric throw, and eccentric wheel profile inoperative part also is a circular arc line, its polar radius of gyration is and lacks shape by the indent moon less than base radius.

Eccentric wheel as shown in Figure 4, the eccentric wheel contour curve is by R, R1, R2, the R3 circular arc is formed, eccentric wheel pivot B and circular arc R center C have an eccentric distance e.A is an any point on the R curve.

Slide block total kilometres H=e+R-R ₅-T ... (1)

In Δ ABX, ∠ ABC=θ

$\frac{\sin A}{e}=\frac{\sin \mathrm{\θ}}{R}$

$\∠A=\arcsin \frac{e\sin \mathrm{\θ}}{R}$

$\∠C=\mathrm{\π}-A-\mathrm{\θ}=\mathrm{\π}-\arcsin \frac{e\sin \mathrm{\θ}}{R}-\mathrm{\θ}$

$\mathrm{AB}=\sqrt{R^2+e^2-2\mathrm{eR}\cos C}$

Slider displacement is S

$S=e+R-\mathrm{AB}=e+R-\sqrt{R^2+e^2-2\mathrm{eR}\cos C}---\left(2\right)$

$\frac{\mathrm{ds}}{\mathrm{d\θ}}=\frac{d(R^2+e^2-2\mathrm{eR}\cos C)}{2\sqrt{R^2+e^2-2\mathrm{eR}\cos C}}$

$=\frac{\mathrm{eR}\sin C(\frac{e\cos \mathrm{\θ}}{R\sqrt{1-\frac{e^2{\sin }^2\mathrm{\θ}}{R}}}+1)}{\sqrt{R^2+e^2-2\mathrm{eR}\cos C}}$

In the formula, $\frac{e^2{\sin }^2\mathrm{\θ}}{R^2}\≈0,$ Following formula is reduced to

$\frac{\mathrm{ds}}{\mathrm{d\θ}}=\frac{\mathrm{eR}\sin C(\frac{e}{R}\cos \mathrm{\θ}+1)}{\sqrt{R^2+e^2-2\mathrm{eR}\cos C}}---\left(3\right)$

By as can be known to the analysis of formula (3), ds/d θ＞0, s is a monotonic increasing function.As seen, when θ=0, S=0, S increases with the θ angle.By Fig. 6 slider displacement S and camshaft degree relation have been described.Slide block feed speed V is the differential of displacement S to time t:

Because $V=\frac{\mathrm{ds}}{\mathrm{dt}}=\frac{\mathrm{ds}}{\mathrm{d\θ}}\·\frac{\mathrm{d\θ}}{\mathrm{dt}}$

D θ/dt is angular velocity omega (radian per second) in the formula

So $V=\frac{\mathrm{ds}}{\mathrm{dt}}=\frac{\mathrm{ds}}{\mathrm{d\θ}}\·\frac{\mathrm{d\θ}}{\mathrm{dt}}=\frac{\mathrm{ds}}{\mathrm{d\θ}}\·\mathrm{\ω}$

$V/\mathrm{\ω}=\mathrm{ds}/\mathrm{d\θ}$

$=\frac{\mathrm{eR}\sin C(\frac{e\cos \mathrm{\θ}}{R\sqrt{1-\frac{e^2{\sin }^2\mathrm{\θ}}{R}}}+1)}{\sqrt{R^2+e^2-2\mathrm{eR}\cos C}}$

$V/\mathrm{\ω}=\frac{\mathrm{eR}\sin (\mathrm{\π}-\arcsin \frac{e\sin \mathrm{\θ}}{R}-\mathrm{\θ})(\frac{e\cos \mathrm{\θ}}{R\sqrt{1-\frac{e^2{\sin }^2\mathrm{\θ}}{R}}}+1)}{\sqrt{R^2+e^2-2\mathrm{eR}\cos (\mathrm{\π}-\arcsin \frac{e\sin \mathrm{\θ}}{R}-\mathrm{\θ})}}---\left(4\right)$

The function curve of v/ ω as shown in Figure 5.The relation of slide block feed speed and eccentric wheel corner is described.As can be seen from Figure 5, feed speed V increases and significantly increases with the θ corner, promptly drives slide block in the different position of eccentric wheel curve, and its feed speed has significant difference.Curve characteristic is for cold milling ring technological process, and is highly beneficial.Rate request can not only be satisfied, and requirement can be reduced kinetic energy.

Speed characteristics can require to adapt with rolling speed, spreading need be in empty feeding, quick during coarse feed, and in the spreading stage, it is near θ continuous jog null value the time, this is that other feeding methods are difficult to accomplish, and electric or hydraulic servo control also can only be that step is successively decreased, and does not accomplish that continous-stable successively decreases.

Speed characteristics are beneficial to power and rationally use.

G＝PV/1020，M＝9740G/n

In the formula, G-spreading power, kw,

The M-cam torque, Nm,

P-spreading power, N,

The V-feed speed, m/s,

N-cam rotating speed, rpm

By displacement and rate curve as can be known, in feeding early stage, although V value is big, during zero load at this moment, the P value is little, and N, M are unlikely excessive; When cold rolling was expanded, owing to roll over the restriction of expanding ratio, ring base wall thickness reduction amount was little, and generally all in the diagram shadow region, slider displacement and speed can both adapt to the needs of cold rolling technology, reach the optimum Match state.

As seen, feed speed V is directly proportional with e, R from formula (4), in order to obtain less feeding speed V, should make e, and R reduces, but from formula (2) as seen, when (e+R) is too small, will leads total displacement S and reduce.Should adjust at actual conditions, satisfy under the spreading low speed situation, increase the e value, can make the displacement Smax in the R curved surface satisfy the impulse stroke requirement, not adjust requirement but satisfy die change.

, satisfying under the prerequisite of intensity, the eccentric wheel real contour line utmost point half that makes nonclient area is through (R for this reason ₅+ T) less than base radius R ₆, to satisfy the requirement of slide block total kilometres.

This eccentric wheel can not only satisfy instructions for use by snugly, and processing is convenient especially, common apparatus can be processed, less demanding to the engine speed adjusting performance, with common uniform speed electric motor as driving eccentric engine, can satisfy the thick feeding requirement of rolling over of ring, this is the eccentric great advantage of circular arc.

Beneficial effect

1. improved the product precision.Mechanical feed speed is not disturbed by working environment, in whole spreading process, is in stable state.

2. cost is low.Eccentric wheel and roller can be processed on universal machine tools, and machining accuracy is controlled easily.

3. bearing capacity is strong, can adapt to the needs of high-power cold-rolling ring rolls.

4. installation, Operation and maintenance are conveniently.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified:

Fig. 1 is a utility model place machine tool structure schematic diagram.

Fig. 2 is an eccentric wheel roller feed mechanism

Fig. 3 is the vertical view of Fig. 2

Fig. 4 is the eccentric wheel profile diagram

Fig. 5 is slider displacement, speed and eccentric wheel angle relation figure.

Among the figure: 1, guide rail, 2, workpiece, 3, working roll, 4, circularity roller, 5, block, 6, fuselage, 7, rolling wheel axle, 8, oil cylinder, 9, the rolling wheel seat, 10, piston holder, 11, roll milling wheel, 12, the frame left plate, 13, core roller, 14, bogie wheel, 15, manipulator, 16, survey roller, 17, the grating chi, 18, slide block, 19, oil cylinder, 20, roller, 21, eccentric wheel, 22, bearing, 23, decelerator, 24, engine, 25, frame right plate, 26, the backhaul oil cylinder, 28, adjusting pad, 30, camshaft, 31, base plate

The specific embodiment

Embodiment 1, in Fig. 2 and Fig. 3, eccentric wheel (21) is installed on the eccentric shaft (30), camshaft is installed on the bearing (22) by bearing, camshaft (30) is connected with decelerator (23), servomotor (24) as engine is connected with decelerator (23), decelerator (23), bearing (22) is installed on the base plate (31), more than the driving feed arrangement of Zu Chenging is installed between slide block (18) and the frame right plate (25), base plate (31) is contained in the left side of frame right plate (25), the cylinder body of oil cylinder (26) is fixed on the frame right plate (25), piston rod and master slider (18) connect, oil cylinder makes the roller (20) that is installed on the slide block (18) be adjacent to eccentric wheel (21) all the time, and feeding drives and is mechanical type, and backhaul is a fluid pressure type.

Embodiment 2, and eccentric wheel (21) is installed on the axle (30), is connected with decelerator as the common uniform speed electric motor (24) of engine.

Job specification has two kinds, and a kind of is that workpiece outer (interior) footpath is measured.During lathe work, see Fig. 1, Fig. 2, the blank that manipulator (15) will be gone up in the hopper is delivered to the position that illustrates workpiece (2), and contact with working roll (3), core roller (13) penetrates in the workpiece (2), engine (24) drives eccentric wheel (21) through decelerator (23) and is rotated counterclockwise, in roller (20) rotation on one side that is mounted on the slide block (18), overcoming under oil cylinder (26) the setting resistance situation on one side, drive slide block (18) along guide rail (1) feeding left, the bogie wheel (14) that is installed in slide block (18) drives core roller (13) and is moved to the left, core roller strap rotating ring base is moved to the left, press to the roll milling wheel (11) that is rotating, bogie wheel (14) promotes core roller (13) and does feed motion by the speed of setting, workpiece rotates under core roller radial pressure and the acting in conjunction of roll milling wheel tangent direction friction power, and workpiece is attenuate gradually, and diameter increases gradually.Circularity roller (4) is center of circle rotation with axle (7) center, the passive gradually yielding in below left, and therebetween, measuring roll (16) is also pushed to right-hand gradually by workpiece, continuously workpiece is measured, when falling back on desired location to the right, ring " size arrives ", spreading finishes.So the eccentric wheel reverse rotation, the bogie wheel (14) on the slide block (18) withdraws to the right.Simultaneously, core roller (13) is extracted out, and forging falls into blanking groove, so far finishes the one-period circulation.

Another kind of job specification is: internally (outward) footpath is not measured.By changing the thickness of adjusting pad (28), adjust core roller (13) and rolling wheel (11) minimum centers-distance, the wall thickness of control workpiece, like this, in workpiece blank weight tolerance scope, (outward) footpath is also controlled in the workpiece, therefore eccentric wheel is nonreversible, and the electromechanical structure of lathe is simple, the work efficiency height.

Servo power machine is used for smart the rolling, and common at the uniform velocity engine is used for thick the rolling or the not high product of required precision.

Claims (3)

1. the eccentric wheel roller feed mechanism of a Ring Rolling Machine, comprise engine (24), decelerator (23), transmission device, slide block (18), engine is connected with decelerator, reducer output shaft is connected with transmission device, transmission device is connected with slide block, backhaul oil cylinder (26) is fixed on the frame (25), its piston rod is connected with slide block (18), it is characterized in that: transmission device also comprises eccentric wheel (21), roller (20), roller is fixed on the slide block (18), is connected with eccentric wheel (21) contact, and eccentric wheel (21) is connected with key with camshaft (30), camshaft (30) is fixed on the frame (25) by bearing (22), camshaft (30) is connected with decelerator (23), and in this mechanism, the contour curve of eccentric wheel working portion is a circular arc line, the center of circle of circular arc line and the eccentric wheel centre of gyration have an eccentric throw, eccentric wheel profile inoperative part also is a circular arc line, and its polar radius of gyration is and lacks shape by the indent moon less than base radius.

2. the eccentric wheel roller feed mechanism of Ring Rolling Machine according to claim 1 is characterized in that decelerator is connected with common at the uniform velocity engine.

3. the eccentric wheel roller feed mechanism of Ring Rolling Machine according to claim 1 is characterized in that decelerator is connected with the engine with servo speed changing function.

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