CN114798718B - Inclined precision cross wedge rolling forming device - Google Patents
Inclined precision cross wedge rolling forming device Download PDFInfo
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- CN114798718B CN114798718B CN202210236150.7A CN202210236150A CN114798718B CN 114798718 B CN114798718 B CN 114798718B CN 202210236150 A CN202210236150 A CN 202210236150A CN 114798718 B CN114798718 B CN 114798718B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/16—Adjusting or positioning rolls
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention relates to the technical field of metal plastic forming equipment, and provides an inclined precise cross wedge rolling forming device, wherein frame units are symmetrically arranged on a base; the guide plate feeding units are symmetrically arranged above the base; the left and right dies are coaxially fixed by left and right shafting respectively; the driving unit is coaxially arranged on the shafting unit to drive the die to rotate; the roll gap adjusting unit is arranged above the rolling mill in a penetrating way, and the size of the distance between the dies is adjusted by controlling the opening and closing degree of the stand; the synchronous units are symmetrically arranged below the rolling mill, so that the two frames are ensured to synchronously open and close; the lifting and tilting unit provides a tilting angle required by the rolling mill by controlling the lifting height. The blanks reach the designated position through the guide plate feeding unit, the roller spacing is adjusted through the roller spacing adjusting unit, and the driving unit provides rolling power to roll the blank wedge cross bar into a product. The invention has the advantages of high rolling precision, convenient die replacement, high degree of automation and the like, can realize rapid material feeding and discharging by utilizing the dead weight of the rolled piece, obviously improves the production efficiency and has wide application prospect.
Description
Technical Field
The invention relates to the technical field of metal plastic forming equipment, in particular to an inclined precise cross wedge rolling forming device.
Background
Cross wedge rolling is recognized as an important component of today's advanced manufacturing technology as an efficient metal plastic forming process. The cross wedge rolling is widely applied to the production of blanks of parts such as automobiles, train axles, internal combustion engines and the like, and has been widely adopted in the market due to the advantages of high production efficiency, metal material saving, low production cost and the like.
The traditional cross wedge rolling mill adopts cylinder pushing, electric pushing cylinder pushing and the like for discharging, and rolled pieces formed by cross wedge rolling can fall out under the action of external force. If the forming temperature is higher, the temperature of the rolled piece still keeps higher after forming, so that the working environment of the pushing device is bad, an independent driving device is needed to provide power for discharging, the cost is high, the working environment is bad, the requirement on equipment is high, and the production efficiency is difficult to improve, so that a cross wedge rolling mill capable of meeting the requirements of quick discharging and high in production efficiency is urgently needed.
Disclosure of Invention
The invention aims to at least overcome the defects of low discharging efficiency and high cost of the traditional cross wedge rolling mill, and provides an inclined precise cross wedge rolling forming device, which can realize the aims of high rolling precision, rapid discharging, no need of an additional power device, cost saving, high production efficiency and the like by utilizing the self gravity at the moment that a rolled piece is separated from a die after the cross wedge rolling forming is finished and rapidly falling out of the rolling mill through a sliding rail through the inclined angle of the base of the rolling mill.
The invention adopts the following technical scheme:
an inclined precise cross wedge rolling forming device comprises a frame unit, a shafting unit, a roll gap adjusting unit, a guide plate feeding unit, a synchronizing unit, a driving unit, a base and an inclined unit;
the frame unit comprises a left frame and a right frame, and is used for installing the shafting unit, the roller spacing adjusting unit and the synchronizing unit and bearing rolling force; the left frame and the right frame can rotate around the frame rotating shaft;
the shafting unit is used for installing a roller, a cross wedge rolling die and the driving unit;
the roll gap adjusting unit is used for driving the roll to linearly move along the radial direction of the blank so as to adjust the roll gap;
the guide plate feeding unit is used for feeding blanks into the roller and preventing the blanks from swinging in the rolling process;
the synchronous unit is used for synchronously and reversely centering the left frame and the right frame to open and close;
the driving unit is used for driving the shafting unit to drive the roller to rotate around the axis so as to provide rolling torque;
the frame unit is arranged on the base;
the lifting and tilting unit is used for lifting the base and further providing a tilting angle required by the device.
In any one of the possible implementation manners described above, there is further provided an implementation manner, where the left rack and the right rack are both load-bearing racks, and are each machined with a corresponding groove for mounting other units; the upper parts of the left frame and the right frame are respectively provided with a roller spacing adjusting unit revolute pair mounting hole, the middle parts are respectively provided with a shafting unit mounting groove, and the lower parts are respectively provided with a rotating shaft mounting hole; the left frame and the right frame are installed on the base through a frame rotating shaft. The frame can rotate around the frame rotating shaft.
In any of the possible implementations described above, there is further provided an implementation, the synchronization unit includes two convex blocks, two concave circular grooves; when the convex round block and the concave round groove are meshed and rotated, the left frame and the right frame are driven to synchronously open and close at the same speed and in opposite directions around the rotating shaft of the frame (through bolts).
In any of the possible implementations described above, there is further provided an implementation manner, wherein the engagement portion of the convex circular block is a protruding semicircle, the engagement portion of the concave circular groove is a concave semicircle, and the outer side of the concave semicircle is connected with the straight section; the convex round block and the concave round groove are tightly matched all the time in the meshing rotation process, the gap is extremely small, the center distance between the convex round block and the concave round groove is kept unchanged all the time, and therefore the center distance is kept unchanged in the rotation process of the left rack rotating shaft and the right rack rotating shaft. The problems of large meshing gap and low rolling precision of the traditional gears are avoided; the concave-convex circle synchronous units are tightly matched and almost have no gap, and can improve the rolling precision from 0.5mm-1mm to 0.05mm-0.2mm.
Any one of the possible implementations described above, further providing an implementation, the shafting unit includes a left shafting and a right shafting; the left shafting and the right shafting comprise a main shaft, a feeding end bearing seat, a discharging end bearing seat, an adjusting washer and a pre-tightening spring;
a cross wedge rolling die is arranged on the main shaft; the adjusting washers are coaxially arranged at two sides of the cross wedge rolling die; the main shaft is supported by the feeding end bearing seat and the discharging end bearing seat together; the feeding end bearing seat and the discharging end bearing seat are fixedly arranged in a shafting installation groove in the middle of the frame through bolts; and a pre-tightening spring is arranged between the bearing seats at the discharge ends of the left shafting and the right shafting, and the axis of the pre-tightening spring is vertical to the axis of the blank. The axial direction centering of the left wedge cross rolling die and the right wedge cross rolling die can be ensured by processing adjusting gaskets with different thicknesses.
Any one of the possible implementations described above further provides an implementation in which the pretension force F1 provided by the pretension spring satisfies 0.1F<F1<0.3F, wherein F is the maximum rolling force that the mill can provide. For phi10-phi 70 and the like, and the pretightening force F provided by the pretightening spring is arranged 1 The rolling runout can be controlled to be 0.02-0.05mm.
Any one of the possible implementations described above, further providing an implementation, the roll gap adjustment unit includes a pull rod, a cylindrical washer, a lock nut, a dial, a pressure sensor;
the cylindrical gaskets are respectively arranged in the grooves of the roller spacing adjusting units corresponding to the upper parts of the left frame and the right frame; a key slot is formed in one end of the pull rod, so that the pull rod and the frame do not rotate relatively; the locking nut is arranged at the tail part of the pull rod positioned at the outer side of the right stand, so that the left stand and the right stand can be ensured to have no opening jump in the rolling process by screwing the locking nut; the dial is arranged on the lock nut, so that accurate adjustment of the roller spacing is realized by rotating to the corresponding scale; the pressure sensor is arranged between the cylindrical washer and the right frame, and the instantaneous rolling force is fed back in real time by measuring the extrusion force applied in the rolling process.
In any of the possible implementations described above, there is further provided an implementation in which the relative rotation angle β satisfies 0+.β+.12 °.
Any one of the possible implementation manners described above, further provides an implementation manner, wherein the guide plate feeding unit comprises a feeding frame, a guide plate and a discharging frame; the feeding frame, the guide plate and the discharging frame are fixedly arranged on the base through bolts; the feeding frame is provided with a guide rail, so that the blank can smoothly enter into an accurate position corresponding to the cross wedge rolling die.
In any of the possible implementations described above, there is further provided an implementation in which the lifting and tilting unit is mounted below the mill base, by means of which the base is provided with a corresponding tilting angle α satisfying 15 ° and α and 35 °.
Any one of the possible implementation manners described above further provides an implementation manner, wherein the blank is a phi 10-phi 70 shaft part and is used for cold precision cross wedge rolling or hot precision cross wedge rolling; the cold rolling temperature is room temperature, and the hot rolling temperature is 700-1200 ℃.
The device can meet the production efficiency of 15-25 pieces formed per minute.
The beneficial effects of the invention are as follows:
1. the self weight of the rolled piece can be utilized, the rolled piece slides out of the rolling mill along the track under the action of self gravity at the moment of separating from the die after the cross wedge rolling forming is finished, the discharging is rapid, an additional power device is not needed, the cost is low, and the production efficiency is higher.
2. The bearing type stand is adopted, the left shafting, the right shafting and the roll gap adjusting unit which are provided with the integral die are directly embedded and arranged in the stand, the force transmission route is short, the integral rigidity of the rolling mill is high, and the precise cross wedge rolling can be realized.
3. The integral die can realize quick roll replacement, the integral die can still ensure higher precision after heat treatment compared with the split die, and the problem that the lower roll of the vertical rolling mill is difficult to replace is avoided by adopting a horizontal shafting unit arrangement mode, so that the quick roll replacement can be realized, and the production efficiency is remarkably improved.
4. The concave-convex circle synchronization unit is adopted, so that the problem of gaps generated in the meshing rotation process is greatly reduced, synchronous centering and opening and closing of the two frames can be ensured, and the rolling center line is ensured not to deviate when the roller spacing is adjusted.
5. And a pre-tightening spring is arranged between the left shafting unit and the right shafting unit, so that necessary pre-tightening force is provided for the cross wedge rolling process, and the high cross wedge rolling precision is ensured.
6. The roller spacing can be directly adjusted by rotating the lock nut with the scales, and the installation and the debugging are simple.
7. The radial rolling force in the cross wedge rolling process can be obtained in real time through the pressure sensor arranged in the frame, and an experimental platform is provided for researching the rolling force change condition in the cross wedge rolling forming process and deeply analyzing the rolling mechanism.
Drawings
Fig. 1A is a schematic structural diagram of an oblique precision cross wedge rolling forming device according to an embodiment of the present invention.
Fig. 1-B shows a schematic side view of an oblique precision cross wedge rolling apparatus according to an embodiment.
Fig. 2 is a schematic diagram of a carrying rack in an embodiment.
FIG. 3 is a schematic diagram of an integrated cross wedge rolling die in an embodiment.
Fig. 4 is a schematic diagram of a concave-convex circle synchronization unit in an embodiment.
Fig. 5 is a diagram showing a comparison of the meshing of the concave-convex circular synchronization unit and the conventional gear in the embodiment.
FIG. 6 is a schematic diagram of the pretension spring in an embodiment.
FIG. 7 is a graph showing the relationship between rolling force and rolling mill overall runout deformation by adding a pre-tightening spring between shafting and compressing the pre-tightening spring to provide sufficient pre-tightening force.
1, a rack unit; 2. an integral mold; 3. a cylindrical gasket; 4. a shafting unit; 5. a roll gap adjusting unit; 6. a guide plate feeding unit; 7. a synchronization unit; 8. a base; 9-a lifting tilting unit; A. a roller spacing adjusting unit mounting groove; B. a shafting unit mounting groove; C. a synchronization unit mounting groove; D. and a rotating shaft mounting hole.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be regarded as being isolated, and they may be combined with each other to achieve a better technical effect. In the drawings of the embodiments described below, like reference numerals appearing in the various drawings represent like features or components and are applicable to the various embodiments.
In the following embodiments, for convenience of description, the two frames are expressed as a left frame and a right frame; the two shafting are expressed as a left shafting and a right shafting; the two molds are expressed as a left mold and a right mold. The distinction between left and right here is merely a distinction between relative positions, and may be made from above and below. The contents of the examples should not be taken as a limitation of the scope of protection.
As shown in fig. 1A and fig. 1B, the inclined precision cross wedge rolling forming device according to the embodiment of the invention comprises a frame unit 1, an integral die 2, a cylindrical washer 3, a right shafting unit 4, a roll gap adjusting unit 5, a guide plate feeding unit 6, a synchronizing unit 7, a base 8 and a lifting and tilting unit 9. The frame unit 1 is symmetrically arranged on the base 8 through a rotating shaft; the guide plate feeding unit 6 is symmetrically arranged above the base 8 about the central axis; the left and right dies 2 are coaxially fixed by left and right shafting respectively; the driving unit is coaxially arranged on the shafting unit 4 and drives the die 2 to rotate; the roll gap adjusting unit 5 is arranged above the rolling mill stand in a penetrating way, and the opening and closing degree of the stand is controlled to adjust the distance between the dies 2; the synchronous units 7 are symmetrically arranged below the rolling mill stand, so that the two stands are ensured to synchronously open and close; a lifting and tilting unit 9 is installed below the base 8 to provide a desired tilting angle of the rolling mill by controlling the lifting height. The metal blank reaches a designated position through a guide plate feeding unit 6, the roller spacing is adjusted to a designated value through a roller spacing adjusting unit 5, and the driving unit provides rolling power to perform cross wedge rolling on the metal blank to obtain a required product.
As shown in fig. 1A and 1B, the stand unit 1 is mounted on the rolling mill base 8 through the synchronization unit 7 and the stand rotating shaft, and the integral die 2 is coaxially connected with the shafting unit 4. The shafting unit 4 provided with the integral die 2 is fixedly arranged on the bearing type frame through the shafting unit mounting groove B. The left frame and the right frame are connected in series through the roller spacing adjusting unit 5, and the pre-tightening force is provided through the pre-tightening spring between the shafting units 4, so that the cross wedge rolling process is ensured to be stable. The guide plate feeding unit 6 ensures that the axial height of the blank is consistent with that of the left shafting and the right shafting.
As shown in fig. 1B, the rolling mill body mechanism sits on a rolling mill base 8, one end of the base 8 is abutted against the ground, and the other end is lifted by a lifting and tilting unit 9, and is disposed at a corresponding tilt angle α to the ground. Alpha is more than or equal to 15 degrees and less than or equal to 35 degrees.
As shown in fig. 2, the bearing frame is provided with a roll gap adjusting unit mounting groove a, a shafting unit mounting groove B, a synchronizing unit mounting groove C and a rotating shaft mounting hole D. Through the groove that sets up above, can be with roll gap adjustment unit 5, shafting unit 4, synchronization unit 7, frame pivot direct fixed mounting in the frame, the rolling force in the cross wedge rolling process is directly transmitted in the frame, has guaranteed that the cross wedge rolling in-process rolling mill rigidity is higher, and the beat is less to realize accurate cross wedge rolling.
As shown in fig. 3, the device adopts an integral cross wedge rolling die 2, the die 2 is arranged at a designated position in a shafting unit 4 through a key slot, and the axial positions of the left die and the right die are ensured to be the same through adjusting the thickness of a gasket.
As shown in fig. 4 and 5, the device adopts the concave-convex circle synchronization unit 7 to ensure that the left stand and the right stand of the rolling mill are synchronously opened and closed, the rolling center line is not deviated, and the rolling center line is always positioned at the central symmetry position. Wherein set up straight section in the synchronous concave circular groove to guarantee synchronous protruding circular block and synchronous concave circular groove external engagement rotation in-process centre-to-centre spacing and do not change, prevent that the clearance from producing the clearance in-process and leading to rolling mill whole central line to take place the skew, and then influence rolling precision.
As shown in FIG. 5, in the conventional gear meshing rotation process, the two-dimensional plane internal teeth are in point contact with the teeth, so that stress is concentrated, gear pitting is easy to occur, gaps are large, and rolling precision is poor. In the invention, the concave-convex round synchronization unit 7 is adopted to control the rotation of the stand, so that small enough clearance is ensured at any time in the meshing rotation process, the rolling precision is high, and the precision wedge cross rolling forming can be realized.
As shown in FIG. 7, a pre-tightening spring is added between shafting, and sufficient pre-tightening force is provided by compressing the pre-tightening spring, so that the integral runout deformation of the rolling mill caused by counter force caused by extrusion metal in the cross wedge rolling forming process is greatly reduced, and further, the precision cross wedge rolling is realized.
The invention achieves the main mechanism analysis of precision rolling:
1. the convex round block is meshed with the concave round groove for rotation: the gap can be reduced to a minimum.
In the conventional gear engagement, as shown in the left side of fig. 5, in order to be assembled smoothly, a gap is required (if no gap exists, the assembly cannot be carried out, the center distance of two gears cannot be guaranteed to be a set value or can not be directly blocked, and the gears cannot be used), and the gap for assembling the gears is usually 0.1-0.15mm, namely, the gap between teeth is minimum at the moment of straightening; when the frame is unfolded to the limit position, the gear engagement also reaches the limit position, and the gap is overlapped with the gap, so that the gap at the limit position can be maximized, and the gap at the limit position is quite large and quite swaying in the use process of actual equipment, which can reach 0.2-0.3mm.
The concave-convex circle is arranged, so that the clearance between the convex circle and the groove can be controlled to be very small, even the concave-convex circle is stuck, no gap exists, no shaking at all occurs or the shaking is very small in a straight state (when the gear is meshed and placed straight, the gear is slightly twisted, shaking can occur due to the existence of an assembly clearance, and the concave-convex circle is not stuck tightly with the groove). Even when the concave-convex circle is in the extreme position, there are two points of contact, as shown in fig. 6: the contact of the two points limits the shaking between the convex round block and the concave round groove, and ensures that the shaking between the concave round block and the concave round groove can not occur. Therefore, the clearance between the limit positions of the concave-convex circles is the same as that between the straight installation positions, the clearance is small, and the clearance does not change with the positions. The gear engagement is reversed with a smaller gap when placed horizontally, but still 0.1-0.15mm, and a larger gap when in the extreme position. For the cross wedge rolling forming of small and medium diameter shaft parts with phi 10-phi 70, the conventional gear meshing rolling precision is +/-1.5 mm; the rolling precision obtained by adopting the concave-convex round device is +/-0.5 mm, and the rolling precision is improved by about 1 mm.
2. Action of the pretension spring:
as shown in fig. 7, the rolling mill and other mechanical equipment have a certain assembly gap (after assembly, the parts are loose, and a certain gap exists between the parts, and are not tightly stretched together). When the pre-tightening spring is not arranged, the rolling force provided by the rolling mill is applied to the rolling piece in the rolling process of the rolling piece, and meanwhile, rolling counter force is applied to each part of the rolling mill, and the rolling counter force tends to outwards expand the two racks, so that the two racks are opened. However, since there is a certain assembly gap in the machine (the assembly process determines that there is a certain gap between the components, and it is impossible to be in a completely tight state, the gap comes from the interior of the machine, and the assembly process determines that it cannot be eliminated), the rolling reaction force applied to the rolling mill compensates the gap in the machine, so that a certain amount of jump is caused, as shown in OA section in fig. 7; after the internal clearance is compensated, the rolling force and the rolling mill deformation are in a linear relation, and the larger the rolling force is, the larger the rolling mill deformation is, and the larger the runout is, as shown in the section AB. When the rolling process is finished, the force rapidly disappears, the frame is folded back again, the interior of the equipment is loosened and back due to the force disappearance, and the parts are loosened and back again, so that the rolling process is repeated, the rolling mill runout is large, and the precision of the rolled parts is not high.
After the pre-tightening spring is added, the counter force generated by compressing the pre-tightening spring is equivalent to compensating the assembly gap between all parts in the rolling mill. In this way, after the assembly gaps among all the components in the rolling mill are compensated by the pretightening force, the rolling piece is put into the rolling mill for rolling, so that the gaps in rolling reaction force compensation equipment are not needed, after the runout amount generated by the assembly gaps among all the components in the equipment is reduced, the runout amount of the rolling mill is reduced by one section in the whole rolling process, as shown by an OCD section in fig. 7, and the precision of the rolled part is quite high. (the runout caused by the internal looseness and the assembly clearance of the rolling mill is far greater than the runout caused by the deformation of the rolling mill due to the rolling force, and the deformation caused by the rolling force is very small because the rigidity of the rolling mill is very high, but the runout caused by the internal tightening and the loosening of the rolling mill due to the rolling force is very large).
For the cross wedge rolling forming of the small and medium diameter shaft parts with phi 10-phi 70, when a pre-tightening spring is not added, xu Songkua exists in the whole rolling mill, and the rolling jumping amount is about 0.3-0.5 mm; after the pre-tightening spring is added and the pre-tightening force compensates the internal looseness of the rolling mill, the rolling jumping amount can be controlled to be about 0.05-0.15mm (0.12 mm or 0.1mm measured by an actual dial indicator of equipment), and the jumping amount is obviously improved.
For the whole equipment, the concave-convex circle setting improves effect: pretension spring improvement effect = 7:3.
The working principle of the invention is as follows:
the whole device adopts inclined arrangement, realizes automatic feeding and discharging by utilizing the dead weight of the metal blank, and adopts a bearing type frame, an integral type cross wedge rolling die 2, a concave-convex circle synchronizing unit 7 and a pre-tightening spring to improve the whole height of the rolling mill, reduce the jumping amount in the rolling process and further realize the cross wedge rolling. The blank with the diameter phi 10-phi 70 heated to the rolling temperature (cold rolling is room temperature, hot rolling is 700-1200 ℃) is transferred into the device, power is provided by the driving unit, the input power is respectively transmitted to the left die and the right die through the shafting unit 4, the left die and the right die 2 are driven to synchronously rotate in the same direction, and the blank is subjected to cross wedge rolling forming between the left wedge cross rolling die and the right wedge cross rolling die 2 under the action of the friction force of the dies and the blank.
At the moment that the rolled piece after the cross wedge rolling is separated from the die, the rolling mill slides out of the rolling mill along the discharging frame under the action of gravity due to the inclined angle of the rolling mill.
The invention has the advantages of high rolling precision, convenient die replacement, high automation degree and the like, can realize quick feeding and discharging by utilizing the dead weight of the rolled piece, and remarkably improves the production efficiency.
Although a few embodiments of the present invention have been described herein, those skilled in the art will appreciate that changes can be made to the embodiments herein without departing from the spirit of the invention. The above-described embodiments are exemplary only, and should not be taken as limiting the scope of the claims herein.
Claims (8)
1. The oblique precision cross wedge rolling forming device is characterized by comprising a frame unit, a shafting unit, a roll gap adjusting unit, a guide plate feeding unit, a synchronizing unit, a driving unit, a base and a lifting and tilting unit;
the frame unit comprises a left frame and a right frame, and is used for installing the shafting unit, the roll gap adjusting unit and the synchronizing unit and bearing rolling force; the left frame and the right frame can rotate around the frame rotating shaft;
the shafting unit is used for installing a roller, a cross wedge rolling die and the driving unit; the shafting unit comprises a left shafting and a right shafting; the left shafting and the right shafting comprise a main shaft, a feeding end bearing seat, a discharging end bearing seat, an adjusting washer and a pre-tightening spring; a cross wedge rolling die is arranged on the main shaft; the adjusting washers are coaxially arranged at two sides of the cross wedge rolling die; the main shaft is supported by the feeding end bearing seat and the discharging end bearing seat together; the feeding end bearing seat and the discharging end bearing seat are fixedly arranged in a shafting installation groove in the middle of the frame through bolts; a pre-tightening spring is arranged between the bearing seats at the discharging ends of the left shafting and the right shafting, and the axis of the pre-tightening spring is vertical to the axis of the blank;
the roll gap adjusting unit is used for driving the roll to linearly move along the radial direction of the blank so as to adjust the roll gap;
the guide plate feeding unit is used for feeding blanks into the roller and preventing the blanks from swinging in the rolling process;
the synchronous unit is used for synchronously and reversely centering the left frame and the right frame to open and close; the synchronous unit comprises two convex round blocks and two concave round grooves; when the convex round block and the concave round groove are meshed and rotated, the left rack and the right rack are driven to synchronously open and close at the same speed and in opposite directions around the rotating shaft of the rack; the convex round block takes part in the meshing part to be a protruding semicircle, the concave round groove takes part in the meshing part to be a concave semicircle, and the outer side of the concave semicircle is connected with a straight section; the convex round block and the concave round groove are meshed and rotated;
the driving unit is used for driving the shafting unit to drive the roller to rotate around the axis so as to provide rolling torque;
the frame unit is arranged on the base;
the lifting and tilting unit is used for lifting the base and further providing a tilting angle required by the device.
2. The oblique precision cross wedge rolling forming device of claim 1, wherein the left frame and the right frame are both load-bearing frames; the upper parts of the left frame and the right frame are respectively provided with a roller spacing adjusting unit revolute pair mounting hole, the middle parts are respectively provided with a shafting unit mounting groove, and the lower parts are respectively provided with a rotating shaft mounting hole; the left frame and the right frame are installed on the base through a frame rotating shaft.
3. The oblique precision cross wedge rolling forming device according to claim 1, wherein the rolling precision is 0.05mm-0.2mm.
4. The oblique precision cross wedge rolling forming device according to claim 1, wherein the pre-tightening pressure F1 provided by the pre-tightening spring meets 0.1F < F1< 0.3F, wherein F is the maximum rolling force provided by the rolling mill.
5. The oblique precision cross wedge rolling forming device according to claim 1, wherein the roll gap adjusting unit comprises a pull rod, a cylindrical washer, a lock nut, a dial and a pressure sensor;
the cylindrical gaskets are respectively arranged in the grooves of the roller spacing adjusting units corresponding to the upper parts of the left frame and the right frame; a key slot is formed in one end of the pull rod, so that the pull rod and the frame do not rotate relatively; the locking nut is arranged at the tail part of the pull rod positioned at the outer side of the right stand, so that the left stand and the right stand are ensured to have no opening jump in the rolling process of tightening the locking nut;
the dial is arranged on the lock nut, so that accurate adjustment of the roller spacing is realized by rotating to the corresponding scale;
the pressure sensor is arranged between the cylindrical washer and the right frame, and the instantaneous rolling force is fed back in real time by measuring the extrusion force applied in the rolling process.
6. The inclined precision cross wedge rolling forming device according to claim 1, wherein the guide plate feeding unit comprises a feeding frame, a guide plate and a discharging frame; the feeding frame, the guide plate and the discharging frame are fixedly arranged on the base through bolts; the feeding frame is provided with a guide rail, so that the blank can smoothly enter into an accurate position corresponding to the cross wedge rolling die.
7. The tilting precision cross wedge rolling forming device according to claim 1, wherein the lifting tilting unit is installed below a rolling mill base, and a corresponding tilting angle alpha is provided for the base through the lifting tilting unit, wherein alpha satisfies 15 degrees less than or equal to 35 degrees.
8. The oblique precision cross wedge rolling forming device according to claim 1, wherein the blank is a phi 10-phi 70 shaft part for cold precision cross wedge rolling or hot precision cross wedge rolling; the cold rolling temperature is room temperature, and the hot rolling temperature is 700-1200 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210236150.7A CN114798718B (en) | 2022-03-11 | 2022-03-11 | Inclined precision cross wedge rolling forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| US4322961A (en) * | 1980-02-26 | 1982-04-06 | Kinefac Corp. | Die rolling machine |
| CN2593055Y (en) * | 2003-01-07 | 2003-12-17 | 东莞艾玛电子有限公司 | Lamp socket rotating structure |
| CN200995226Y (en) * | 2006-11-16 | 2007-12-26 | 太原市通泽成套设备有限公司 | Roller adjuster of horizontal seamless steel pipe rolling machine |
| CN201654715U (en) * | 2010-04-27 | 2010-11-24 | 高小岗 | Novel mouse |
| CN105032930B (en) * | 2014-11-07 | 2016-11-30 | 上海理工大学 | The three vertical cross wedge rolling machines of roller |
| CN104668290B (en) * | 2015-01-23 | 2017-01-04 | 合肥市百胜科技发展股份有限公司 | Milling train |
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| CN205797991U (en) * | 2016-06-16 | 2016-12-14 | 邵胜太 | A kind of short-stress path two horizontal skew rolling mill of roller |
| CN106217724B (en) * | 2016-07-21 | 2019-02-01 | 上海市凌桥环保设备厂有限公司 | Milling train is prolonged in a kind of two roll-in of high-precision anti-jumping |
| CN206723781U (en) * | 2017-05-08 | 2017-12-08 | 齐志辉 | Nonpetroleum refinery instrument suspension arrangement |
| CN206958039U (en) * | 2017-07-27 | 2018-02-02 | 广州市腾昶贸易有限公司 | Bayonet unit |
| CN107905444A (en) * | 2017-12-23 | 2018-04-13 | 苏州娄城新材料科技有限公司 | A kind of small snap-gauge of partition wall |
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| CN110193516B (en) * | 2019-06-20 | 2021-02-05 | 北京科技大学 | Double-rotating-shaft type skew rolling mill |
| CN110153339B (en) * | 2019-06-20 | 2020-06-26 | 北京科技大学 | Double-rotating-shaft cantilever type skew rolling mill |
| CN210358546U (en) * | 2019-07-25 | 2020-04-21 | 山东泰金精锻股份有限公司 | Automatic discharging device for cross wedge rolling |
| CN210979756U (en) * | 2019-12-10 | 2020-07-10 | 江苏兰特恩光电科技有限公司 | L ED support convenient to angle regulation |
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