CN208261523U - A kind of mandril pre-rotation high-precision punch - Google Patents

Abstract

The utility model provides a kind of mandril pre-rotation high-precision punch, it includes mounting base, it prewhirls rotation mechanism and mandril, rotation mechanism of prewhirling includes connection end cap, active ring, driven torus, several wedge-shaped parts and several prerotation components, it is by adding rotation mechanism of prewhirling on traditional mandril, rotation mechanism of prewhirling is driven to rotate using external force, and then mandril is made to carry out pre-rotation along the direction opposite with bar direction of rotation, when the top of mandril and bar initially contact and are felt relieved, the rotary inertia of reverse rotation make mandril quickly bite bar accurately complete centering work, simultaneously, when bar makes mandril rotating Vortex using frictional force, rotation mechanism of prewhirling has no effect mandril, solves the technical problem of the centering inaccuracy in large-scale punching machine post rod perforation procedure.

Description

A kind of mandril pre-rotation high-precision punch

Technical field

The utility model belongs to piercing mill of seamless steel tube technical field of auxiliary equipment, and specially a kind of mandril pre-rotation is high-precision Spend punch.

Background technique

Punch is the main former of seamless steel tube production, it is to utilize two rolls, upper bottom guide and top institute The closed type of formation carries out rolloff to steel pipe blank at high temperature and passes through closed type, pierces solid bar At seamless steel pipe, here it is the basic functional principles of punch.

Major impetus source in perforation procedure is two rolls, under huge roll-force and frictional force effect, bar Complicated plastic deformation occurs, and rotates around mandril and is moved along mandril line direction.At the same time, effect of the mandril in frictional force Under rotated together also with hollow billet.

In middle-size and small-size perforation unit, the diameter and length of usual mandril are generally little, and rotary inertia is relatively small, mandril Rotating torque needed for rotating is provided by frictional force of the bar to top, is felt relieved in the top of mandril and bar initial contact In the process, rotary inertia is small, and the bounce of top is small, generally not will cause bar in perforation procedure and is torn or perforates the things such as difficulty Therefore.

But for large-scale punching machine, with the increase of mandril diameter and length, mandril rotary inertia also accordingly increases Add, this explanation must obtain biggish rotating torque in perforation procedure to rotate together mandril with bar.Facts proved that When due to the increase of mandril rotary inertia to a certain extent, carried out in centering process in top and bar initial contact, the jump of mandril It is dynamic acutely centering to be easy to cause to deviate, molding wall thickness of seamless steel tube unevenness is eventually led to, bar is even resulted in and is torn, Broken situation of even perforating occurs.

In the Chinese patent of Patent No. CN101428296B, a kind of prewhirling for large-scale punching machine post rod is disclosed Rotary device, mainly by rack, upper pressure roller assembly by feed screw nut, step lead screw, pressing plate, butterfly spring, rectangle slide, quilt Dynamic pressure roller and driven axle composition and two sets of mutually isostructural driving roller assemblies are by decelerating motor, sprocket wheel, chain, cylinder support, cunning Seat, oil cylinder, initiative compression roller and slide plate composition are constituted, wherein upper pressure roller assembly configures in Founder on the rack, two sets of driven rollers are total It configures at inclined reverse symmetry in the two sides of rack, upper pressure roller assembly central axis and the driven roller that every suit is arranged obliquely are total At central axis respectively at 120 ° of angles.The utility model can bite rolling groove in pipe and contact top moment supply mandril one Determine detent torque, the tearing of hollow billet caused by reduction perforation procedure mandril rotary inertia is excessive and perforation are difficult.

But technical solution disclosed in above-mentioned patent, it is only to make mandril carry out the pre-rotation in the same direction with bar to be opened Dynamic torque makes mandril be easier to bite in bar, but is initially contacting centering with bar with the mandril of bar rotating Vortex Moment, frictional force can be such that bounce aggravates, and centering is caused the aggravation of the problem of deviation occur.

Utility model content

In view of the above problems, the utility model provides a kind of mandril pre-rotation high-precision punch, by tradition Mandril on add rotation mechanism of prewhirling, using external force drive prewhirl rotation mechanism rotate, and then make mandril along and bar direction of rotation Opposite direction carries out pre-rotation, when the top of mandril and bar initially contact and are felt relieved, the rotation of reverse rotation Inertia make mandril quickly bite bar accurately complete centering work, meanwhile, revolve mandril in the same direction using frictional force in bar When turning, rotation mechanism of prewhirling has no effect mandril, and the centering solved in large-scale punching machine post rod perforation procedure is inaccurate True technical problem.

To achieve the above object, the utility model provides the following technical solutions:

A kind of mandril pre-rotation high-precision punch, comprising:

Mounting base, the mounting base are arranged symmetrically, are that convex shape is arranged, and its middle part is equipped with mounting hole；

It prewhirls rotation mechanism, the both ends of the rotation mechanism of prewhirling pass through the mounting hole and are rotatably dispose in the mounting base, It includes that connection end cap, active ring, driven torus, several wedge-shaped parts and several prerotation components, the connection end cap are symmetrical The both ends of the rotation mechanism of prewhirling are set to, and the connection end cap of either end and driving device are sequentially connected, the active ring is set Be placed in the middle part of the rotation mechanism of prewhirling, be arranged for circular ring shape, and its both ends is fastenedly connected with the connection end cap, it is described from Rotating ring is coaxially disposed in the active ring, is placed equidistant with several splines, the wedge-shaped part on inner ring around its central axes Axis along the active ring is placed equidistant between the active ring and driven torus, and the wedge-shaped part and the active ring Raceway is formed between the outer wall of inner wall and the driven torus, the prerotation component is provided in the raceway；And

Mandril, the mandril are arranged on the inner ring of the driven torus, convex with the position of the driven torus corresponding matching Equipped with several keyways, which is equipped with spline one-to-one correspondence.

As an improvement, the spline is shuttle shape setting, both ends are angle shape.

As an improvement, the wedge-shaped part is wholely set with the active ring comprising be directed toward at the driven torus center First working face and in the counterclockwise direction with vertically disposed second working face of the first working face of next wedge-shaped part.

As an improvement, the wedge-shaped part is wholely set with the driven torus comprising be directed toward at the driven torus center First working face and in the counterclockwise direction with vertically disposed second working face of the first working face of next wedge-shaped part.

As an improvement, offering spring hole on first working face.

As an improvement, the prerotation component includes:

Roller, the roller are movably set in the raceway, and the thickness direction along the driven torus is arranged；

Spring, the spring are set in the spring hole, are directed toward the roller setting；And

Movable post, one end of the movable post are set in the spring hole, and are fixedly connected with the spring, other end activity It is set to outside the spring hole.

As an improvement, the end of the connection end cap of driving device transmission connection is provided with sprocket wheel, the sprocket wheel and institute Connection end cap is stated to be fastenedly connected.

As an improvement, the two sides of the connection end cap and the mounting hole belled position are respectively arranged with standby cap and first axle It holds, the standby cap is set to the outside of the mounting base, is provided with circlip between the mounting base resistance surface, described First bearing is set to the inside of the mounting base, is provided with sealing ring between the resistance surface of the connection end cap.

As an improvement, the both ends of the active ring and driven torus belled position are symmetrically arranged with second bearing and third axis It holds.

The utility model has the beneficial effects that:

(1) the utility model passes through using rotation mechanism of prewhirling is added on traditional mandril, drives pre-rotation using external force The active ring of mechanism rotates, then rotates driven torus by the left and right that rubs, and drives the rotation of mandril and bar by driven torus later Direction is reversely rotated, when the top of mandril and bar initially contact and are felt relieved, the rotary inertia of reverse rotation So that mandril is quickly bitten bar and accurately complete centering work, reduces the bounce of mandril, meanwhile, made in bar using frictional force When mandril rotating Vortex, do not interfered between active ring and driven torus；

(2) the utility model, using the rotation of active ring, is driven by the way that wedge-shaped part is arranged between active ring and driven torus Friction between roller and the second working face and active ring inner wall of wedge-shaped part, rotates driven torus, and then drives mandril rotation Turn, and in frictional force active rotation of the mandril by bar, the first working face cooperation of roller and wedge-shaped part keeps active ring pre- There is only lower sliding frictions between driven torus, make active ring that can not interfere the rotation of driven torus；

(3) the utility model, which passes through, is supported the rear end of mandril using rotation mechanism of prewhirling, and bar is made to pass through friction Power drives in mandril rotary course, limits freedom degree of the mandril in rotary course, reduces the bounce of mandril, keeps the steady of rotation It is qualitative；

(4) the utility model is matched by setting shuttle shape for spline using the keyway on the spline and mandril of shuttle shape It closes, so that the angle on spline is pressed from both sides end and be quickly inserted into the keyway of mandril, and during plugging together, the arc of spline two sides Shape side can be oriented to keyway, position easily and fast.

In conclusion the utility model has perforation accurate, deviation is small, form seamless steel pipe quality it is high the advantages that, especially It is suitable for piercing mill of seamless steel tube technical field of auxiliary equipment.

Detailed description of the invention

Fig. 1 is the utility model transverse direction schematic cross-sectional view；

Fig. 2 is the utility model longitudinal direction schematic cross-sectional view；

Fig. 3 is structure enlargement diagram at A in Fig. 2；

Fig. 4 is the utility model connection end cap schematic cross-sectional view；

Fig. 5 is the utility model mounting base positive structure diagram；

Fig. 6 is the utility model driving wheel schematic cross-sectional view；

Fig. 7 is the utility model driven wheel positive structure diagram；

Fig. 8 is the utility model driven wheel schematic perspective view；

Fig. 9 is the utility model driven wheel schematic cross-sectional view；

Figure 10 the utility model standby cap positive structure diagram；

Figure 11 is the utility model mandril positive structure diagram；

Figure 12 is the utility model mandril side structure schematic view；

Figure 13 is two positive structure diagram of the utility model embodiment.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", The orientation or positional relationship of the instructions such as " clockwise ", " counterclockwise " be based on the orientation or positional relationship shown in the drawings, be only for Convenient for description the utility model and simplify description, rather than the equipment of indication or suggestion meaning or element must have specifically Orientation is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention, More than, unless otherwise specifically defined.

Embodiment one:

As shown in Figure 1, Figure 2, shown in Fig. 4, Fig. 5, Fig. 6, Figure 11 and Figure 12, a kind of mandril pre-rotation high-precision punch, comprising:

Mounting base 1, the mounting base 1 are arranged symmetrically, are that convex shape is arranged, and its middle part is equipped with mounting hole 11；

It prewhirls rotation mechanism 2, the both ends of the rotation mechanism 2 of prewhirling pass through the mounting hole 11 and are rotatably dispose in the mounting base On 1 comprising connection end cap 21, active ring 22, driven torus 23, several wedge-shaped parts 24 and several prerotation components 25, institute The both ends that connection end cap 21 is symmetrically disposed on the rotation mechanism 2 of prewhirling are stated, and the connection end cap of either end and driving device are driven Connection, the active ring 22 is set to the middle part of the rotation mechanism 2 of prewhirling, is arranged for circular ring shape, and its both ends and the company It connects end cap 21 to be fastenedly connected, the driven torus 23 coaxial arrangement is equidistant around its central axes on inner ring in the active ring 22 It is provided with several splines 230, the wedge-shaped part 24 is placed equidistant with along the axis of the active ring 22 in the active ring 22 It is formed between driven torus 23, and between the outer wall of the inner wall and the driven torus 23 of the wedge-shaped part 24 and the active ring 22 Raceway 26 is provided with the prerotation component 25 in the raceway 26；And

Mandril 3, the mandril 3 are arranged on the inner ring of the driven torus 23, with 23 corresponding matching of driven torus Position is convexly equipped with several keyways 31, which is equipped with the spline 230 one-to-one correspondence.

It should be noted that when active ring 22 is rotated by driving device drive, it is pre- by being arranged in raceway 26 The transmitting for turning the moment of friction of component 25 makes 23 rotating Vortex of driven torus, and then makes mandril by spline 230 and the cooperation of keyway 31 3 are rotated, at this point, the direction of rotation of mandril 3 is opposite with the direction of rotation of bar.

It further illustrates, when the top of mandril 3 and the end of bar carry out initial contact centering, mandril 3 and stick Material reversely rotates, and at this time at the center for withstanding bar of mandril 3, reversely rotates the speed for accelerating top to bite bar, makes It comes directly towards in quick insertion bar, and guarantees that the center of mandril 3 and the center of bar precisely align.

It further explains, in the case where bar persistently rotates, the frictional force between bar and the mandril 3 bitten makes mandril 3 reverse rotation torque is gradually offset, and only starts synchronized rotation in the same direction to bar and mandril 3, in friction of the mandril 3 by bar When power loads, there is also the loads of bar frictional force on driven torus 23, at this point, there is only cunnings between active ring 22 and driven torus 23 Dynamic friction, active ring 22 do not generate interference to the rotation of driven torus 23 and mandril 3, control active ring 22 by driving device later It stops rotating.

As shown in figure 8, both ends are angle shape as a preference, the spline 230 is shuttle shape setting.

It should be noted that when mandril 3 is inserted into driven torus 23, in order to which the dress of driven torus 23 Yu mandril 3 is rapidly completed Match, sets shuttle shape, the end of angle shape and arc-shaped side edges for spline 230, spline 230 and keyway 31 can be quickly finished Assembly.

As shown in fig. 7, as a preferred embodiment, the wedge-shaped part 24 is wholely set with the driven torus 23, It includes being directed toward the first working face 241 at 23 center of driven torus and in the counterclockwise direction with next wedge-shaped part 24 Vertically disposed second working face 242 of one working face 241.

Wherein, spring hole 243 is offered on first working face 241.

As shown in figure 3, further, the prerotation component 25 includes:

Roller 251, the roller 251 are movably set in the raceway 26, along the thickness direction of the driven torus 23 Setting；

Spring 252, the spring 252 are set in the spring hole 243, are directed toward the roller 251 and are arranged；And

Movable post 253, one end of the movable post 253 are set in the spring hole 243, and are fixedly connected with the spring 252, Its other end is movably set in outside the spring hole 243.

It should be noted that when driving device drives active ring 22 to be rotated counterclockwise, due to the elastic force of spring 252 And the frictional force that roller 251 is subject to itself, so that the inner ring of roller 251 and active ring 22 and the second working face 242 is in wedge Tight state rotates mandril 3 at this point, active ring 22 drives the synchronous rotating Vortex of driven torus 23.

It further illustrates, after the top of mandril 3 and the bar completion of spinning bite centering work, 3 meeting of mandril It is driven by the frictional force between bar and is rotated along the direction of rotation opposite with active ring 22, at this point, due to driven torus 23 Autonomous rotation, the elastic force of spring 252 can not have an impact roller 251, and roller 251 is pulled to one end of the first working face 241 On, the wedging status releasing between the inner ring face of roller 251 and active ring 22 and the second working face 242, active ring 22 with from There is only opposite slidings between rotating ring 23.

As shown in Figure 1, as a preferred embodiment, with the connection end cap 21 of driving device transmission connection End is provided with sprocket wheel 4, which is fastenedly connected with the connection end cap 21.

It should be noted that driving device drives connection end cap 21 to rotate by the sprocket wheel chain kind of drive, and then drive Active ring 22 is rotated.

It is shown as a preferred embodiment, the connection end cap 21 and the mounting hole as shown in Fig. 1 and Figure 10 The two sides of 11 belled positions are respectively arranged with standby cap 51 and first bearing 52, and the standby cap 51 is set to the outer of the mounting base 1 Circlip 53 is provided between side, with 1 resistance surface of mounting base, the first bearing 52 is set to the mounting base 1 Inside, be provided with sealing ring 54 between the resistance surface of the connection end cap 21.

As shown in Figure 1, as a preferred embodiment, the both ends of the active ring 22 and 23 belled position of driven torus Symmetrically it is arranged with second bearing 55 and 3rd bearing 56.

Embodiment two:

Figure 13 is a kind of a kind of structural schematic diagram of the embodiment two of mandril pre-rotation high-precision punch of the utility model； As shown in figure 13, wherein appended drawing reference corresponding with embodiment one is used with a kind of identical or corresponding component of embodiment, for letter Just for the sake of, the distinctive points with embodiment one are hereafter only described.The difference of the embodiment two and embodiment one shown in FIG. 1 exists In:

As shown in figure 13, a kind of mandril pre-rotation high-precision punch, the wedge-shaped part 24 and 22 one of active ring Setting comprising the first working face 241 for being directed toward at 23 center of driven torus and in the counterclockwise direction with next wedge-shaped part 24 vertically disposed second working face 242 of the first working face 241.

It should be noted that the place different from embodiment one is, and in this implementation, 22 one of wedge-shaped part 24 and active ring Setting, active ring 22 by driving device drive rotated when, due to spring 252 elastic force and roller 251 itself by Frictional force, so that the outer ring of roller 251 and driven torus 23 and the second working face 242 is in the state of wedging, at this point, active ring 22 drive the synchronous rotating Vortex of driven torus 23, rotate mandril 3.

It further illustrates, after the top of mandril 3 and the bar completion of spinning bite centering work, 3 meeting of mandril It is driven by the frictional force between bar and is rotated along the direction of rotation opposite with active ring 22, at this point, due to driven torus 23 Autonomous rotation, the elastic force of spring 252 can not have an impact roller 251, and roller 251 is pulled to one end of the first working face 241 On, the wedging status releasing between roller 251 and 23 outer ring face of driven torus and the second working face 242, active ring 22 with it is driven There is only opposite slidings between ring 23.

The course of work:

When initial, when active ring 22 is rotated by driving device drive, acted on by frictional force and elastic force, roller 251 make active ring 22 be in wedging state with driven torus 23, and active ring 22 rotates mandril 3 by driven torus 23, mandril 3 The bar turned with reversed spin is contradicted, and the top of mandril 3 starts to bite in bar, carries out centering work to bar, due to It being reversely rotated between mandril 3 and bar, mandril 3 can fast and accurately bite in bar, after the completion of mandril 3 bites work, The frictional force that the torque of the spinning of bar gives mandril 3 by bar, it is same in the same direction that frictional force drives mandril 3 to carry out with bar Speed rotation, at this point, roller 251 is pulled on one end of the first working face 241, the wedging shape between active ring 22 and driven torus 23 State releases, and any interference does not occur between the rotation of active ring 22 and the rotation of driven torus 23, and later, driving device is controlled by counting Control case control makes active ring 22 stop rotating.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model Protection scope within.

Claims (9)

1. a kind of mandril pre-rotation high-precision punch characterized by comprising

Mounting base (1), the mounting base (1) are arranged symmetrically, are that convex shape is arranged, and its middle part is equipped with mounting hole (11)；

It prewhirls rotation mechanism (2), the both ends of the rotation mechanism of prewhirling (2) pass through the mounting hole (11) and are rotatably dispose in the installation On seat (1) comprising connection end cap (21), active ring (22), driven torus (23), several wedge-shaped part (24) and several pre- Turn component (25), the connection end cap (21) is symmetrically disposed on the both ends of rotation mechanism (2) of prewhirling, and the connecting pin of either end Lid is sequentially connected with driving device, and the active ring (22) is set to the middle part of rotation mechanism (2) of prewhirling, and sets for circular ring shape It sets, and its both ends is fastenedly connected with the connection end cap (21), driven torus (23) coaxial arrangement is in the active ring (22) It is interior, it is placed equidistant with several splines (230) on inner ring around its central axes, the wedge-shaped part (24) is along the active ring (22) axis is placed equidistant between the active ring (22) and driven torus (23), and the wedge-shaped part (24) and the active ring (22) raceway (26) are formed between the outer wall of inner wall and the driven torus (23), are provided with the prerotation in the raceway (26) Component (25)；And

Mandril (3), the mandril (3) is arranged on the inner ring of the driven torus (23), corresponding with the driven torus (23) to match The position of conjunction is convexly equipped with several keyways (31), which corresponds with the spline (230) and be equipped with.

2. a kind of mandril pre-rotation high-precision punch according to claim 1, which is characterized in that the spline (230) For shuttle shape setting, both ends are angle shape.

3. a kind of mandril pre-rotation high-precision punch according to claim 1, which is characterized in that the wedge-shaped part (24) Be wholely set with the active ring (22) comprising the first working face (241) for being directed toward at the driven torus (23) center and In the counterclockwise direction with vertically disposed second working face (242) of the first working face (241) of next wedge-shaped part (24).

4. a kind of mandril pre-rotation high-precision punch according to claim 1, which is characterized in that the wedge-shaped part (24) Be wholely set with the driven torus (23) comprising the first working face (241) for being directed toward at the driven torus (23) center and In the counterclockwise direction with vertically disposed second working face (242) of the first working face (241) of next wedge-shaped part (24).

5. a kind of mandril pre-rotation high-precision punch according to claim 3 or 4, which is characterized in that first work Make to offer spring hole (243) on face (241).

6. a kind of mandril pre-rotation high-precision punch according to claim 5, which is characterized in that the prerotation component (25) include:

Roller (251), the roller (251) are movably set in the raceway (26), the thickness along the driven torus (23) Direction setting；

Spring (252), the spring (252) are set in the spring hole (243), are directed toward roller (251) setting；And

Movable post (253), one end of the movable post (253) are set in the spring hole (243), and fixed with the spring (252) Connection, the other end are movably set in the spring hole (243) outside.

7. a kind of mandril pre-rotation high-precision punch according to claim 1, which is characterized in that be driven with driving device The end of the connection end cap (21) of connection is provided with sprocket wheel (4), and the sprocket wheel (4) and the connection end cap (21) fastening connect It connects.

8. a kind of mandril pre-rotation high-precision punch according to claim 1, which is characterized in that the connection end cap (21) standby cap (51) and first bearing (52), the standby cap are respectively arranged with the two sides of the mounting hole (11) belled position (51) it is set to the outside of the mounting base (1), is provided with circlip (53) between the mounting base (1) resistance surface, The first bearing (52) is set to the inside of the mounting base (1), sets between the resistance surface of the connection end cap (21) It is equipped with sealing ring (54).

9. a kind of mandril pre-rotation high-precision punch according to claim 1, which is characterized in that the active ring (22) Second bearing (55) and 3rd bearing (56) are symmetrically arranged with the both ends of driven torus (23) belled position.