CN215965745U

CN215965745U - Multi-degree-of-freedom guide mechanism suitable for shearing and common composite spinning forming

Info

Publication number: CN215965745U
Application number: CN202122235899.3U
Authority: CN
Inventors: 许金亮; 赵文龙; 王东坡; 岳建飞; 马世成
Original assignee: Haiying Aerospace Materials Research Institute Suzhou Co ltd
Current assignee: Haiying Aerospace Materials Research Institute Suzhou Co ltd
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2022-03-08
Anticipated expiration: 2031-09-15

Abstract

The utility model provides a multi-degree-of-freedom guide mechanism suitable for shearing and common composite spinning forming, which comprises: the guide disc is correspondingly provided with the compound screw mechanism, so that the guide mechanism performs axial displacement and circumferential revolution along the compound screw mechanism; the first piston rods are uniformly distributed along the peripheral surface of the guide disc and extend along the radial direction of the guide disc; the V-shaped bracket is rotatably connected to the tail end of the first piston rod so as to rotate on a plane where the axis of the guide disc is located; the rubber track, the rubber track setting is on V type support, and the corresponding blank inner wall of contradicting of rubber track upper band face to slide along the blank inner wall. The guiding mechanism slides along the inner surface of the blank through the rubber track and extrudes the inner wall of the blank along the radial direction to center the ring rolling die core and the blank, so that the concentricity of the blank and the ring rolling die core is ensured.

Description

Multi-degree-of-freedom guide mechanism suitable for shearing and common composite spinning forming

Technical Field

The utility model belongs to the technical field of spinning forming, and particularly relates to a multi-degree-of-freedom guide mechanism suitable for shearing and common composite spinning forming.

Background

The spin forming process is widely used for machining a revolving body part as a forming process with high precision and large unit forming force. At present, the existing spinning forming mode of a thin-wall revolving body workpiece comprises outer spinning forming and inner spinning forming, the outer spinning forming process is to use a spinning die as a workpiece inner support, a spinning wheel rolls from the outer surface of the workpiece to generate a point-by-point plastic forming effect, and the inner spinning forming process is opposite to the outer spinning forming process, the spinning die covers the outer surface of the workpiece to be used as an outer support, and the spinning wheel rolls from the inner surface of the workpiece to form. In any forming mode, the combined motion of the die, the workpiece and the rotary wheel is used for generating spiral line motion of the contact point of the rotary wheel and the workpiece on the surface of the workpiece, so that the forming action covers the whole workpiece.

In the process of spinning by using a short core die, a guide mechanism is required to be arranged to guide the die in the axial displacement process so as to enable the spinning die and a workpiece to have higher coaxiality.

Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a guide mechanism which has strong universality and can act on the spinning of a larger workpiece.

In order to achieve the above purpose, the utility model provides the following technical scheme:

a multi-degree-of-freedom guide mechanism suitable for shearing and common composite spinning forming comprises:

the guide disc is correspondingly provided with a compound screw mechanism, so that the guide mechanism performs axial displacement and circumferential revolution along the compound screw mechanism;

the first piston rods are uniformly distributed along the outer peripheral surface of the guide disc and extend along the radial direction of the guide disc;

the V-shaped bracket is rotatably connected to the tail end of the first piston rod so as to rotate on a plane where the axis of the guide disc is located;

the rubber track is arranged on the V-shaped support, and the upper belt surface of the rubber track corresponds to the inner wall of the blank in a collision mode so as to slide along the inner wall of the blank.

Preferably, the multi-degree-of-freedom guide mechanism suitable for the shearing-shearing composite spinning forming further includes a steering mechanism, and the steering mechanism includes:

the arc-shaped groove is formed in one end of the V-shaped bracket;

and the third piston rod is fixedly connected to the first piston rod and extends and retracts along the axial direction of the first piston rod, and the tail end of the third piston rod is assembled in the arc-shaped groove in a sliding mode and exerts extrusion force on the arc-shaped groove along the radial direction of the arc corresponding to the arc-shaped groove.

Preferably, the multiple-degree-of-freedom guide mechanism suitable for the shearing-shearing composite spinning forming includes:

the middle part of the supporting column is hinged to the first piston rod;

the two n-shaped pieces are fixedly connected to the outer wall of the supporting column and distributed in a V shape, and the rubber crawler belt is correspondingly arranged between the two n-shaped pieces through a bearing;

and a sliding block is arranged between the two n-shaped pieces at any end of the V-shaped support, and the sliding block is provided with the arc-shaped groove.

Preferably, the multiple-degree-of-freedom guide mechanism suitable for the shear-and-plain composite spinning forming includes:

the driving shaft lead screw is in threaded assembly at the axis of the guide disc so as to drive the guide disc to generate axial displacement by transmitting rotary torque;

the two turntables are correspondingly arranged at two ends of the driving shaft screw rod so as to drive the guide disc to generate circumferential revolution by transmitting rotary torque;

the driven shaft screw rods are uniformly distributed along the circumferential direction of the driving shaft screw rods and are in threaded assembly with the guide disc so as to enable the guide disc and the rotary disc to synchronously revolve;

the driven shaft lead screw converts axial displacement generated by the guide disc into rotation motion.

Preferably, the driving shaft screw and the driven shaft screw are both ball screws, and the guiding disc is correspondingly connected with the driving shaft screw and the driven shaft screw through ball barrels.

In the multi-degree-of-freedom guide mechanism suitable for the shearing-shearing composite spinning forming, preferably, the composite screw mechanism is further provided with a ring rolling mold core which moves synchronously with the guide mechanism.

Preferably, the number of the guide mechanisms is two, and the ring rolling die cores are correspondingly arranged between the two guide mechanisms.

Preferably, the first piston rod is a hydraulic rod, and the third piston rod is a gas spring support rod.

Preferably, the third piston rod is fixedly connected to the first piston rod through the connecting seat.

Has the advantages that: the guiding mechanism slides along the inner surface of the blank through the rubber track, extrudes the inner wall of the blank along the radial direction, and centers the ring rolling die core and the blank to ensure the concentricity of the blank and the ring rolling die core.

The guide mechanism is driven by the composite lead screw mechanism, and is driven by the driving lead screw and the turntable, so that the guide mechanism and the ring rolling die core synchronously perform composite motion of circumferential rotation and axial movement, the problems of large axial displacement space required by a short core die and limited length of a formed workpiece in a forming process are effectively solved, and the composite forming of a long, large and complex rotary body workpiece is realized.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. Wherein:

FIG. 1 is a schematic structural view of a spinning apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view of a ring rolling core according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a compound screw mechanism according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a guide mechanism in an embodiment of the present invention;

fig. 5 is a schematic view of the assembly of the arcuate slot in the embodiment provided by the present invention.

In the figure: 1. a machine tool; 2. installing a station; 3. assembling a bolt; 4. a blank; 5. rotating the wheel; 6. a compound screw mechanism; 7. grinding the ring mold core; 8. a guide mechanism; 9. carrying out tail jacking; 6-1, driving a shaft screw; 6-2, a turntable; 6-3, a driven shaft screw; 7-1, an annular core mold; 7-2, a second piston rod; 7-3, a linker; 7-4, a die core disc; 7-5, lower bolts; 7-6, mounting a bolt; 8-1, rubber track; 8-2, a bearing; 8-3, supporting columns; 8-4, n-shaped piece; 8-5, a first piston rod; 8-6, arc-shaped groove; 8-7, a third piston rod; 8-8, a sliding block; 8-9, a guide disc.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

As shown in fig. 1 to 5, a multiple-degree-of-freedom guide mechanism suitable for shearing and general composite spinning forming, the guide mechanism 8 includes: the guide discs 8-9 are correspondingly provided with the compound screw mechanism 6, so that the guide mechanism 8 performs axial displacement and circumferential revolution along the compound screw mechanism 6; the first piston rods 8-5 are uniformly distributed along the peripheral surface of the guide disc 8-9, and extend along the radial direction of the guide disc 8-9; the V-shaped bracket is rotatably connected to the tail end of the first piston rod 8-5 so as to rotate on a plane where the axis of the guide disc 8-9 is located; the rubber track 8-1 is arranged on the V-shaped support, and the upper belt surface of the rubber track 8-1 correspondingly abuts against the inner wall of the blank 4 so as to slide along the inner wall of the blank 4. The V-shaped support is supported through the first piston rod 8-5 to provide radial supporting force for the blank 4, the rubber crawler belt 8-1 is arranged on the V-shaped support, and the rubber crawler belt 8-1 slides inside the blank 4 while axial movement is carried out, so that friction force is reduced, and the fluency of the axial movement is improved.

Aiming at blanks or workpieces with different inner diameters, the telescopic amount of the first piston rod 8-5 is adjusted, so that the universality of the guide mechanism is improved, and the application range of the guide mechanism is wider.

In another alternative embodiment of the utility model, the guide means 8 further comprise a steering means comprising: an arc-shaped groove 8-6, wherein one end of the V-shaped bracket is provided with the arc-shaped groove 8-6; and the third piston rod 8-7 is fixedly connected to the first piston rod 8-5 and extends and retracts along the axial direction of the first piston rod 8-5, the tail end of the third piston rod 8-7 is assembled in the arc-shaped groove 8-6 in a sliding mode, and extrusion force is applied to the arc-shaped groove 8-6 along the radial direction of the arc corresponding to the arc-shaped groove 8-6. The circle center of the arc corresponding to the arc-shaped groove 8-6 is positioned on a third piston rod 8-7, the V-shaped support can rotate through a support column 8-3, the third piston rod always applies extrusion force to the arc-shaped groove 8-6, so that the tail end of the third piston rod 8-7 has a movement trend of coinciding with the top point of the arc-shaped groove 8-6, the rubber crawler belt forms a flexible support corresponding to the inner wall of the blank 4, and the rubber crawler belt can rotate and incline when the inner part of the blank 4 is uneven; meanwhile, the tail end of the third piston rod 8-7 is slidably assembled in the arc-shaped groove 8-6, and the V-shaped support is driven to reset by the reset trend that the top of the arc-shaped groove 8-6 and the tail end of the third piston rod 8-7 are overlapped with each other through extrusion force.

In another alternative embodiment of the present invention, the V-shaped stent comprises:

the middle part of the support column 8-3 is hinged on the first piston rod 8-5; the end part of the first piston rod 8-5 is provided with an installation sleeve, and the support column 8-3 is sleeved in the installation sleeve to form rotary connection.

The n-shaped pieces 8-4 are fixedly connected with the outer walls of the supporting columns 8-3 at two ends of the n-shaped pieces 8-4, the two n-shaped pieces 8-4 are distributed in a V shape, the rubber crawler 8-1 is correspondingly arranged between the two n-shaped pieces 8-4 through the bearing 8-2, and the rubber crawler 8-1 is correspondingly arranged between the two n-shaped pieces 8-4 through the bearing 8-2; the two n-shaped members 8-4 support the rubber crawler 8-1 so that the rubber crawler 8-1 can conduct between the two n-shaped members 8-4.

A sliding block 8-8 is arranged between the two n-shaped pieces 8-4 at any end of the V-shaped bracket, and an arc-shaped groove 8-6 is arranged on the sliding block 8-8. In particular, the slider 8-8 is fixedly connected between the two n-shaped pieces 8-4.

In another alternative embodiment of the present invention, the compound screw mechanism 6 includes: a driving shaft lead screw 6-1 is in threaded assembly at the axis of the guide disc 8-9 so as to drive the guide disc 8-9 to generate axial displacement by transmitting rotary torque; the rotary tables 6-2 are arranged at two ends of the driving shaft screw 6-1, and the rotary tables 6-2 drive the guide discs 8-9 to generate circumferential revolution through transmitting rotary torque; the driven shaft screw rods 6-3 are uniformly distributed along the circumferential direction of the driving shaft screw rod 6-1, and the driven shaft screw rods 6-3 are in threaded assembly with the guide discs 8-9; the driving shaft screw 6-1 and the driven shaft screw 6-3 are both rotationally connected with the turntable 6-2, so that the guide disc 8-9 and the turntable 6-2 synchronously revolve; the driven shaft lead screw 6-3 converts the axial displacement generated by the guide disc 8-9 into self-rotation motion.

When the guide mechanism moves axially, the guide disc moves axially along the driven shaft lead screw 6-3, the driven shaft lead screw 6-3 converts the axial movement of the guide disc into self rotation, so that unbalance loading caused by stress can be avoided when the guide disc moves axially, and the coaxiality between the guide mechanism and the composite lead screw mechanism is ensured.

In another alternative embodiment of the present invention, the driving shaft screw 6-1 and the driven shaft screw 6-3 are both ball screws, and the guiding discs 8-9 are correspondingly connected to the driving shaft screw 6-1 and the driven shaft screw 6-3 through ball cylinders. The lower end of the third piston rod 8-7 is fixedly connected to the first piston rod 8-5 through a mounting seat.

In another alternative embodiment of the utility model, the compound screw mechanism 6 is also fitted with a ring die 7 that moves synchronously with the guide mechanism 8.

The guide mechanism 8 and the ring rolling die core are coaxially arranged on the composite screw rod mechanism 6 to move synchronously with the ring rolling die core, and particularly, the guide mechanism 8 and the ring rolling die core have the same assembly structure with the assembly structure of the composite screw rod mechanism; the guiding mechanism 8 extrudes the inner wall of the blank 4 along the radial direction, and the guiding mechanism 8 is used for guiding the ring rolling die core and centering the ring rolling die core and the blank 4. The phenomenon that materials in an undeformed material area and a deformed material area are unstable in the spinning process of the short-core die is solved, the plastic deformation area of the materials between the ring grinding die core and the spinning wheel 5 is uniform and stable, the spinning forming precision is improved, the roundness and the centering degree of the blank 4 can be improved, and the ellipse phenomenon in the spinning process is eliminated.

In some embodiments, the first piston rod 8-5 is a hydraulic rod and the third piston rod 8-7 is a gas spring support rod. The third piston rod 8-7 is fixedly connected to the first piston rod 8-5 through a connecting seat.

In another alternative embodiment of the utility model, there are two guide mechanisms 8 on the same compound screw mechanism 6, and the ring rolling die 7 is correspondingly arranged between the two guide mechanisms 8. Two guide mechanisms 8 are correspondingly arranged on two sides of the ring rolling mould core to guide the ring rolling mould core when the ring rolling mould core reciprocates along the axial direction, preferably, the driving shaft screw 6-1 and the driven shaft screw 6-3 are both ball screws, and the ring rolling mould core is correspondingly connected with the driving shaft screw 6-1 and the driven shaft screw 6-3 through ball cylinders. The ball screw is adopted to control the displacement of the guide mechanism 8 and the ring rolling mold core, so that high-precision digital control can be realized, the integration of axial, circumferential and radial displacement control of the spinning mold is realized, and the forming capability of the tool is improved.

In another alternative embodiment of the present invention, the driven shaft screws 6-3 may be 6, 4, 3, 2, etc. and are circumferentially equispaced about the driving shaft screws. The guide mechanism 8 and the ring rolling die core are assembled in the same way as the compound screw mechanism 6.

In another alternative embodiment of the utility model, the toroidal core comprises: the mold core disc 7-4, the driving shaft screw 6-1 and the driven shaft screw 6-3 are in threaded assembly; the annular core mold 7-1 is sleeved outside the core mold tray 7-4 concentrically, and the annular core mold 7-1 is sleeved outside the core mold tray 7-4 concentrically; the second piston rods 7-2 and the second piston rods 7-2 are uniformly distributed on the outer peripheral surface of the mold core disc 7-4 and support the inner wall of the annular mold core 7-1 along the radial direction of the mold core disc 7-4. The second piston rod 7-2 provides supporting force for the annular core die, and meanwhile, the annular core die 7-1 in different shapes can be designed in a segmented mode to be replaced according to the size of the spinning piece and the shape of a bus, so that the economic benefit of the die is greatly improved.

In another alternative embodiment of the utility model, the second piston rod 7-2 and the annular core mould 7-1 are connected through a connecting bolt, the second piston rod 7-2 is a hydraulic rod, the second piston rod 7-2 is connected with a hydraulic station through a discharge valve and stretches with the bolt to suck hydraulic oil, and the core mould disc 7-4 and the annular core mould 7-1 are supported.

In another alternative embodiment of the utility model, the connecting bolt comprises a connecting body 7-3, an upper bolt 7-6 and a lower bolt 7-5, the upper bolt 7-6 and the lower bolt 7-5 are distributed at two ends of the connecting body 7-3, and the upper bolt 7-6 is in threaded connection with the inner wall of the annular core mould 7-1; the lower bolt 7-5 is in threaded connection with the piston end of the second piston rod 7-2;

preferably, the upper bolt 7-6 is rotatably coupled to one end of the connecting body 7-3, and the lower bolt 7-5 is rotatably coupled to the other end of the connecting body 7-3. The concrete steps are that a spanner is used for fixing the connector 7-3, and the upper half part of the bolt is screwed into the threaded hole of the annular core mould 7-1 until fastening; and then slowly screwing the bolt at the lower half part into the piston end of the second piston rod 7-2, gradually raising the second piston rod 7-2 in the screwing process, sucking hydraulic oil into the hydraulic cylinder until screwing is stopped, closing the relief valve at the moment, and disconnecting the hydraulic station to enable the second piston rod 7-2 to have supporting force, wherein the telescopic length of the second piston rod 7-2 can be adjusted as required, and pressure can be applied to the second piston rod 7-2 through the hydraulic station to enable the supporting force of the second piston rod 7-2 to be adjustable. The annular core mold 7-1 and the hydraulic telescopic mechanism are connected by the double-head movable connecting bolt, so that the problem of non-concentricity in multi-point assembly can be solved, the coaxiality of the mold and the rotating axis and the rigidity of the mold are greatly improved, and the core mold is convenient to assemble and disassemble. The second telescopic rod is driven by the connecting bolt and the hydraulic station, so that the tension of the spinning die is controllable, the stress state of a material deformation area of the spinning blank 4 can be optimized by matching the combined spinning core die, the spinning forming precision is improved, the roundness of a spinning part is particularly optimized, and the coaxiality problem of the spinning part is improved.

The utility model also provides multi-degree-of-freedom spinning equipment suitable for shearing and common composite spinning forming, which comprises any one spinning die; the spinning device further comprises a machine tool 1, wherein the machine tool 1 is provided with an installation station 2 for assembling a blank 4, specifically, the installation station 2 is provided with a screw hole, the blank 4 is fixedly connected to the installation station 2 through an assembly bolt 3, one end of the spinning die extends into the blank 4 and is correspondingly assembled on the machine tool 1, and the machine tool 1 is provided with a first driving device corresponding to the driving shaft screw 6-1 and a second driving device corresponding to the rotary table 6-2; the spinning equipment also comprises a tail top 9, the tail top 9 is correspondingly abutted against the turntable 6-2 at the other end of the spinning die, and the spinning wheel 5 is abutted against the outer surface of the blank 4.

In conclusion, the utility model provides the multi-degree-of-freedom guide mechanism 8 suitable for shearing and common composite spinning forming, the multi-degree-of-freedom guide mechanism 8 is driven by the composite screw mechanism 6, so that the spinning die has axial, radial and circumferential multi-degree-of-freedom displacement capability, the combined type outer spinning die capable of replacing a short core die is realized, the universal interchangeability of various spinning forming processes such as powerful spinning, shearing spinning, common spinning and the like is met, the forming precision and the forming efficiency are optimized, the high-efficiency precise forming of straight-cylinder type and curved bus type revolving body workpieces is realized, the economic benefit of the spinning die is greatly improved, and the flexible manufacturing of the spinning die is realized. In addition, the guide mechanism 8 slides along the inner surface of the blank 4 through the rubber track 8-1 and extrudes the inner wall of the blank 4 along the radial direction to center the ring rolling die core and the blank 4, so that the concentricity of the blank 4 and the ring rolling die core is ensured. It should be understood that the above description is only exemplary, and the embodiments of the present invention do not limit the present invention.

The above description is only exemplary of the utility model and should not be taken as limiting the utility model, as any modification, equivalent replacement, or improvement made within the spirit and principle of the utility model is intended to be covered by the appended claims.

Claims

1. A multi-degree-of-freedom guide mechanism suitable for shearing and common composite spinning forming is characterized by comprising:

2. The multi-degree-of-freedom guide mechanism suitable for shearing and shearing composite spinning forming according to claim 1, further comprising a steering mechanism, wherein the steering mechanism comprises:

the arc-shaped groove is formed in one end of the V-shaped bracket;

3. The multi-degree-of-freedom guide mechanism suitable for shearing and shearing composite spinning forming according to claim 2, wherein the V-shaped support comprises:

the middle part of the supporting column is hinged to the first piston rod;

4. The multi-degree-of-freedom guide mechanism suitable for shearing and shearing composite spinning forming according to claim 1, wherein the composite lead screw mechanism comprises:

5. The multi-degree-of-freedom guide mechanism suitable for shearing-shearing composite spinning forming according to claim 4, wherein the driving shaft screw and the driven shaft screw are both ball screws, and the guide disc is correspondingly connected with the driving shaft screw and the driven shaft screw through ball cylinders.

6. The multi-degree-of-freedom guide mechanism suitable for shearing and shearing composite spinning forming according to claim 5, wherein the composite screw rod mechanism is further provided with a ring rolling mold core which moves synchronously with the guide mechanism.

7. The multi-degree-of-freedom guide mechanism suitable for shearing and shearing composite spinning forming according to claim 6, wherein there are two guide mechanisms on the same composite screw mechanism, and the ring rolling die core is correspondingly arranged between the two guide mechanisms.

8. The multi-degree-of-freedom guide mechanism suitable for shearing and general composite spinning forming according to claim 2, wherein the first piston rod is a hydraulic rod, and the third piston rod is a gas spring support rod.

9. The multi-degree-of-freedom guide mechanism suitable for shearing and general composite spinning forming according to claim 2, wherein the third piston rod is fixedly connected to the first piston rod through a connecting seat.