CN104722578A - Rolling device for rod piece forging blank and rod piece forming method - Google Patents
Rolling device for rod piece forging blank and rod piece forming method Download PDFInfo
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- CN104722578A CN104722578A CN201510175307.XA CN201510175307A CN104722578A CN 104722578 A CN104722578 A CN 104722578A CN 201510175307 A CN201510175307 A CN 201510175307A CN 104722578 A CN104722578 A CN 104722578A
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Abstract
The invention discloses a rolling device for a rod piece forging blank and a rod piece forming method. The rolling device comprises a rack, an upper rolling roller and a lower rolling roller, wherein the upper rolling roller and the lower rolling roller are arranged on the rack, and roller cores of the upper rolling roller and the lower rolling roller are mutually parallel. A driving mechanism drives the upper rolling roller and the lower rolling roller to perform same-directional rotation, the roller bodies of the upper rolling roller and the lower rolling roller are provided with rolling faces matched with the peripheral face of a rod to be rolled in a protruding mode, the regions defined by the peripheral edges of the rolling faces unfolded on planes are triangles, the vertex angles of the triangles are located in the middles of the rolling rollers, the upper positions and the lower positions of the vertex angles of the upper rolling roller and the lower rolling roller located at initial rolling positions correspond to each other, and the vertex angles are opposite in pointing direction. Two sides forming each vertex angle axially extend on the rolling face of the corresponding rolling roller towards two ends in the circumferential direction, the rolling faces are identical in arc length from head to tail in the circumferential direction, and the lower rolling roller beside the front portion in the direction pointed by the corresponding vertex angle is provided with a limiting convex block for the rod to be rolled. The rolling device for forging a rod piece is simple in working procedures, low in cost and high in forming quality.
Description
Technical field
The present invention relates to metal plastic forming technical field, particularly a kind of for the rolling device of rod member forging blank and the forming method of this rod member.
Background technology
Some parts in plant equipment, often need these parts of requirement to possess higher intensity and hardness, to strengthen parts wearability and to improve service life.For example for the rake teeth parts of agricultural machinery, because himself is in the process used, need to contact frequently with crops or ground, therefore these rake teeth parts of requirement are needed to possess stronger wearability and higher service life, above-mentioned parts adopt the mode of high temperature forging shaping mostly, to increase above-mentioned parts metal compaction degree, and then increase hardness and the intensity of this type component.Shown in composition graphs 1, this rake teeth entirety is in pin shape, the head end crown a of rake teeth is little, the large layout of tail end, its head end crown a is working end, and its tail end and frame are fixed, and head end crown a entirety is in coniform, head end crown a is connected with interlude b, interlude b from head end to tail end diametrically increase gradually shaft-like, the tail end of interlude b is connected with the stub end of frustum of a cone changeover portion c, and the little head end of frustum of a cone changeover portion c is connected with cylinder installation end d.
In prior art, produce the mode that such rake teeth mostly adopts setting down, shown in composition graphs 2, there is shown the shape of the production process of this rake teeth and rake teeth parts corresponding to each production process.First high-temperature heating is carried out to cylindric steel ingot, red steel ingot after heating imports forging roll forging and the interlude b of stretched rake teeth, this time shaping after blank shape one end thin, one end is thick, after shaping for the first time, continue to carry out high-temperature heating to blank, the mode of fetal membrane open die forging is utilized to process the frustum of a cone changeover portion c of rake teeth tail end, after frustum of a cone changeover portion c processes, again high-temperature heating is carried out to this blank, head end crown a part machines by the mode of recycling die forging, mach mode is finally utilized to carry out trimming process, final production goes out rake teeth up to specification.There is certain defect in aforesaid way: first, in the process of whole component processing, needs experience heat and forge for three times, adds heating cost so on the one hand, also makes the oxide layer of blank surface thicken on the other hand, had a strong impact on the surface quality of part; Secondly, use fetal membrane when producing frustum of a cone changeover portion c, the surplus of follow-up cutted thread is large, beat large, easily cause tool damage; In addition, the cooperation of multiple forging mode completes, and causes during last forging crown and cannot accurately locate, the length dimension inaccuracy of product.
Summary of the invention
The object of the present invention is to provide a kind of rolling device of rod member forging blank, the red steel ingot heated can be made can to roll out the blank of preliminary forging rake teeth, only need can obtain shaped article by a die forging mode, simplify the production process of rake teeth class rod member.
For realizing above object, the technical solution used in the present invention is: a kind of rolling device of rod member forging blank, comprise and frame and frame arrange arranged parallel to each other upper of roller core, bottom roll, driving mechanism drive described in upper, bottom roll rotating in same direction, on, on the body of roll of bottom roll, convex shape is provided with the rolling surface coincide with bar side face to be rolled, rolling surface is triangle by the region that the periphery after planar development surrounds, wherein drift angle is positioned in the middle part of roll, upper when being in rolling initial position, the upper-lower position of the drift angle on bottom roll is corresponding, drift angle points to instead, to form the both sides of drift angle along the circumferential direction to extend to two ends vertically on roll surface, rolling surface is identical in the arc length from the head to the tail of circumferencial direction, the bottom roll being positioned at the anterior side in direction shown in drift angle is arranged the spacing block set of bar to be rolled.
Compared with prior art, there is following technique effect in the present invention: the roll utilizing two rotating in same directions, upper, the body of roll of bottom roll is arranged the rolling surface of convex shape, on, the corner position of the rolling surface of bottom roll is corresponding and sensing is contrary, rod member to be rolled is imported, in the rolling mouth formed between bottom roll, on driving mechanism drives, in the process that bottom roll rotates, the rolling surface protruded cooperatively interacts and can make shaft-like bar by centre to two ends crimp, the centre of shaft-like bar attenuates, two ends are thicker gradually, thus steel ingot blank tentatively can be rolled into the blank that can forge rake teeth, at the drift angle of bottom roll rolling surface anterior side, spacing block set is set, thus shaft-like steel ingot blank accurately can be located, guarantee that the drift angle of the rolling surface of top and bottom rolls is in the middle position of bar, extruded to two ends by the centre position of bar.
Another object of the present invention is the forming method providing a kind of rod member, and its molding procedure is simple.
For realizing above object, the technical solution used in the present invention is:
A), blanking, will the wire and rod raw material of rod member be made cut into the steel ingot blank of segment;
B), to steel ingot blank carry out high-temperature heating, be heated into the red steel state being convenient to rolling;
C), by the red steel ingot after heating import rolling device, roll out the forging blank of rod member to be formed;
D), by the forging blank of the rod member to be formed rolled out import in the die cavity in die forging machine, die forging machine work is also suppressed the forging blank in die cavity;
E), by the blank after compacting in die forging chamber take out and carry out trimming process, and finally obtain into flat rod member.
Compared with prior art, there is following technique effect in the present invention: utilizes above-mentioned rolling device, by heating after red steel ingot rolling be shaft-like forging blank to be formed, this shaft-like forging blank imports in the die cavity of die forging machine, utilize die forging machine that shaft-like forging blank one step is pressed into the material of finished product, to finished product materials deburring and clout process, thus obtain the rake teeth part of finished product.Simplify the production process of rake teeth, guarantee the quality of rake teeth, reduce production cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of rake teeth in the present invention;
Fig. 2 be blank corresponding after rake teeth production process and each production process in prior art shape;
Fig. 3 is the shape of blank corresponding after the production process of rake teeth of the present invention and each production process;
Fig. 4 is the structural representation of rolling device in the present invention;
Fig. 5 is the structural representation of the another side from Fig. 4;
Fig. 6 is the plane outspread drawing of the rolling surface of topping roll in the present invention;
Fig. 7 is the I-I sectional view of Fig. 6;
Fig. 8 is the side direction view of rolling device in the present invention;
Fig. 9 is the front view of rolling device in the present invention.
Detailed description of the invention
Composition graphs 1 to Fig. 9 is described further the present invention:
First, the structure of rolling device in the present invention is described in detail, a kind of rolling device of rod member forging blank, comprise and frame and frame arrange arranged parallel to each other upper of roller core, bottom roll 10, 20, driving mechanism drive described in upper, bottom roll 10, 20 rotating in same directions, on, bottom roll 10, on the body of roll of 20, convex shape is provided with the rolling surface 11 coincide with bar side face to be rolled, 21, rolling surface 11, 21 regions surrounded by the periphery after planar development are triangle, wherein drift angle 111, 211 are positioned in the middle part of roll, upper when being in rolling initial position, bottom roll 10, drift angle 111 on 20, the upper-lower position of 211 is corresponding, drift angle points to instead, form drift angle 111, the both sides of 211 along the circumferential direction extend to two ends vertically on roll surface, rolling surface 11, 21 is identical in the arc length from the head to the tail of circumferencial direction, the bottom roll 20 being positioned at the anterior side in direction shown in drift angle 211 is arranged the spacing block set 22 of bar to be rolled.
Utilize the roll 10 of two rotating in same directions, 20, upper, bottom roll 10, the body of roll of 20 is arranged the rolling surface 11 of convex shape, 21, on, bottom roll 10, the rolling surface 11 of 20, the drift angle 111 of 21, 211 positions are corresponding and sensing is contrary, imported by rod member to be rolled, bottom roll 10, in the rolling mouth formed between 20, on driving mechanism drives, bottom roll 10, in 20 processes of rotating, the rolling surface 11 of protrusion, 21 cooperatively interact can make shaft-like bar by centre to two ends crimp, and the centre of shaft-like bar attenuates, two ends are thicker gradually, thus steel ingot blank tentatively can be rolled into the blank that can forge rake teeth, arrange spacing block set 22 at the anterior side of drift angle 211 of bottom roll 20 rolling surface 21, thus shaft-like steel ingot blank accurately can be located, on guaranteeing, bottom roll 10, the rolling surface 11 of 20, the drift angle 111 of 21, 211 middle position being in bar, are extruded to two ends by the centre position of bar, by rolling surface 11, 21 arrange in and bar to be rolled, coincideing of the rake teeth namely in the present invention, thus shaft-like steel ingot can be made tentatively to be pressed into can be used for the blank forging rake teeth, this rolling surface 11, 21 structures are ingenious, facilitate the rolling of rod member, reduce the impulsive force that roll bears, and bar is a bit extruded to two ends gradually by centre, while guaranteeing bar effect of rolling, promote the service life in roll pressed face.
Further, described rolling surface 11,21 is arranged on the surface of cambered plate 10A, 20A, and upper and lower roll 10,20 body of roll arranges some cambered plate 10A, 20A successively.According to diameter and the forming requirements of rod member to be rolled, can arrange cambered plate 10A, 20A of varying number, the body of roll side face along upper and lower roll 10,20 is arranged, and is convenient to the replacing of rolling surface 11,21 and the maintenance to roller mill.
Shown in composition graphs 4, Fig. 5 and Fig. 6, wherein, leading portion contoured surface 11a, 21a of rolling surface 11,21 conform to the cross section profile of the stage casing shaft of bar to be rolled, and described rolling surface 11,21 posterior segment contoured surface 11b, 21b conform to the cross section profile of the two ends shaft of bar to be rolled.Along with the rotating in same direction of upper and lower roll 10,20, front end contoured surface 11a, 21a of rolling surface 11,21 cooperatively interact thus can by extruded for the stage casing shaft of bar, along with upper and lower roll 10,20 rotates further, posterior segment contoured surface 11b, 21b of rolling surface 11,21 cooperatively interact can by extruded for the two ends of bar.
Due to rolling surface 11, 21 make for the extremely strong steel of intensity hardness, rolling surface 11, the cost of manufacture of 21 is high, in order to save certain material cost, and described rolling surface 11, the leading portion contoured surface 11a of 21, 21a is holistic plate face, and the contoured surface in this plate face conforms to the interface profile of the stage casing shaft of bar to be rolled, the contoured surface 11a in this integral slab face, 21a can guarantee that the interlude of bar can be compressing, composition graphs 4, Fig. 5, Fig. 6, rolling surface 11, 21 posterior segment contoured surface 11b, 21b is roll 10 vertically, 20 circumferential direction also extend to axial two ends, rolling surface 11, 21 posterior segment contoured surface 11b, be area of absence B between 21b, this area of absence B also can be regarded as: rolling surface 11, 21 posterior segment contoured surface 11b, 21b is by leading portion contoured surface 11a, 21a tail end circumference postpones in two battens or raised line shape, the posterior segment contoured surface 11b of two battens or raised line shape, between 21b, interval is arranged, and makes rolling surface 11, the posterior segment contoured surface 11b of 21, 21b is two spaced convex tendons, and be the steel plate without the need to adding high strength between two convex tendons, No. 45 general steel, like this can be at utmost cost-saving.
Further, drop from the mouth that rolls formed between upper and lower roll 10,20 for avoiding bar to be rolled, the both sides of the vertical direction of upper and lower roll 10,20 roller core line are respectively provided with limiting plate 30, the tail end of both sides limiting plate 30 is respectively fixedly installed in frame, the rolling mouth that the head end of both sides limiting plate 30 is formed between roll 10,20 up and down extends, below the head end of both sides the limiting plate 30 and roll surface interval of bottom roll 20 is arranged, and this spacing dimension is greater than the maximum outside diameter of rod member final molding to be rolled.Bar after complete rolling can be fallen down by limiting plate 30 and the gap below bottom roll 20.
Further, rolling surface 11,21 is provided with for increasing the anti-skidding indentation 112,212 with bar frictional force to be rolled, anti-skidding indentation 112,212 is postponed along rolling surface 11,21 circumference, and anti-skidding indentation 112,212 is corresponding with the comparatively small pole diameter end of rod member to be rolled to be arranged.
For rake teeth parts, present to tail end entirety the pin shape becoming large gradually by crown because its entirety presents, therefore the both sides forming rolling surface 11,21 drift angle 111,211 are conformed to the cross section profile of the two ends shaft of bar to be rolled, and high, low setting on one side on one side, anti-skidding indentation 112,212 is positioned on the lower limit of rolling surface 11,21 and arranges.Shown in composition graphs 7, size a in diagram is rolling surface 11, the distance of 21 higher back gauge roller cores, size b in diagram is rolling surface 11, the distance of 21 lower back gauge roller cores, roll 10, in 20 processes of rotating, be positioned at the rolling surface 11 on higher one side, the linear velocity of 21 is greater than the rolling surface 11 on higher one side, the linear velocity of 21, therefore, bar is in the process of rolling, side rotating speed is too fast to be faster in linear velocity, bar is made to present certain reversing the trend, the phenomenon of deflection is often there is in the operation of rolling of reality, therefore, compared with flash being arranged anti-skidding indentation 112, 212, rolling surface 11 can be increased, 21 with the frictional force of bar, thus prevent the torsion phenomenon of bar in the operation of rolling, anti-skidding indentation 112, 212 is annular knurl face or non-slip groove, so just can make uniform force in the operation of rolling of both sides, overcome the problem that blank reverses, final ejection smoothly.
Further, the edge contour of described cambered plate 10A, 20A comprises two parallel straight sections and two arc limit sections, the straight section of cambered plate 10A, 20A is parallel with the shaft core line of upper and lower roll 10,20 and fit and arrange, and the arc limit section circumferencial direction of cambered plate 10A, 20A connects the embedding layout that postpones.
The two ends of cambered plate 10A, 20A and the arranged outside being positioned at rolling surface 11,21 has installing hole, on described upper and lower roll 10,20, correspondence offers mounting groove 12,23, the flute length direction of described mounting groove 12,23 is parallel with the roller length direction of roll 10,20, mounting groove 12,23 is the T-slot of closing in shape, installing hole is equipped with construction bolt, and the end head of construction bolt stretches into the bottom land of the large end of mounting groove 12,23 and fixes with the nut in bottom land.
Below the method making this rake teeth in the present invention is introduced:
A forming method for rod member as claimed in claim 1, it comprises the following steps:
A), blanking, will the wire and rod raw material of rod member be made cut into the steel ingot blank of segment;
B), to steel ingot blank carry out high-temperature heating, be heated into the red steel state being convenient to rolling;
C), by the red steel ingot after heating import rolling device, roll out the forging blank of rod member to be formed;
D), by the forging blank of the rod member to be formed rolled out import in the die cavity in die forging machine, die forging machine work is also suppressed the forging blank in die cavity;
E), by the blank after compacting in die forging chamber take out and carry out trimming process, and finally obtain into flat rod member.
Utilize above-mentioned rolling device, by heating after red steel ingot rolling be shaft-like forging blank to be formed, this shaft-like forging blank imports in the die cavity of die forging machine, utilize die forging machine that shaft-like forging blank one step is pressed into the material of finished product, to finished product materials deburring and clout process, thus obtain the rake teeth part of finished product.Simplify the production process of rake teeth, guarantee the quality of rake teeth, reduce production cost.
The steel ingot blank of described cutting is cylindric, and the length of steel ingot blank is 345mm, diameter is 42mm;
The heating-up temperature of described steel ingot blank is 1000 DEG C ~ 1100 DEG C, heat time 35s ~ 45s.Preferably, heating-up temperature is 1050 DEG C, and the heat time is 40s;
Red steel ingot after described heating imports extruding force 155T ~ 165T that rolling device applies, extrusion time 2s ~ 2.2s.Preferably, the extruding force importing rolling device applying is 160T, and extrusion time is 2.1s, and by modulating the actuating speed of the driving mechanism of roll, and then regulate the speed of roll, rolling speed is fast, effective.
Claims (10)
1. a rolling device for rod member forging blank, comprises and frame and frame arranges arranged parallel to each other upper of roller core, bottom roll (10, 20), it is characterized in that: driving mechanism drive described in upper, bottom roll (10, 20) rotating in same direction, on, bottom roll (10, 20) on the body of roll, convex shape is provided with the rolling surface (11 coincide with bar side face to be rolled, 21), rolling surface (11, 21) region surrounded by the periphery after planar development is triangle, wherein drift angle (111, 211) be positioned in the middle part of roll, upper when being in rolling initial position, bottom roll (10, 20) drift angle (111 on, 211) upper-lower position is corresponding, drift angle points to instead, forms drift angle (111, 211) both sides along the circumferential direction to extend, rolling surface (11 to two ends vertically on roll surface, 21) identical in the arc length from the head to the tail of circumferencial direction, the bottom roll (20) being positioned at the anterior side in direction shown in drift angle (211) is arranged the spacing block set (22) of bar to be rolled.
2. the rolling device of rod member forging blank according to claim 1, it is characterized in that: described rolling surface (11,21) is arranged on the surface of cambered plate (10A, 20A), and upper and lower roll (10, the 20) body of roll arranges some cambered plates (10A, 20A) successively.
3. the rolling device of rod member forging blank according to claim 1 and 2, it is characterized in that: the leading portion contoured surface (11a, 21a) of rolling surface (11,21) conforms to the cross section profile of the stage casing shaft of bar to be rolled, described rolling surface (11,21) posterior segment contoured surface (11b, 21b) conforms to the cross section profile of the two ends shaft of bar to be rolled.
4. the rolling device of rod member forging blank according to claim 3, it is characterized in that: the leading portion contoured surface (11a, 21a) of described rolling surface (11,21) is holistic plate face, the contoured surface in this plate face conforms to the cross section profile of the stage casing shaft of bar to be rolled, rolling surface (11,21) posterior segment contoured surface (11b, 21b) vertically roll (10,20) circumferential direction extending to axial two ends is area of absence (B) between rolling surface (11,21) posterior segment contoured surface (11b, 21b).
5. the rolling device of rod member forging blank according to claim 1 and 2, it is characterized in that: on, bottom roll (10, 20) both sides of the vertical direction of roller core line are respectively provided with limiting plate (30), the tail end of both sides limiting plate (30) is respectively fixedly installed in frame, the head end of both sides limiting plate (30) upwards, bottom roll (10, 20) the rolling mouth formed between extends, below the head end of both sides limiting plate (30) and the roll surface interval of bottom roll (20) is arranged, and this spacing dimension is greater than the maximum outside diameter of rod member final molding to be rolled.
6. the rolling device of rod member forging blank according to claim 4, it is characterized in that: rolling surface (11,21) is provided with for increasing and the anti-skidding indentation of bar frictional force to be rolled (112,212), anti-skidding indentation (112,212) is postponed along rolling surface (11,21) circumference, and anti-skidding indentation (112,212) is corresponding with the comparatively small pole diameter end of rod member to be rolled to be arranged.
7. the rolling device of rod member forging blank according to claim 2, it is characterized in that: the edge contour of described cambered plate (10A, 20A) comprises two parallel straight sections and two arc limit sections, the straight section of cambered plate (10A, 20A) is parallel with the shaft core line of upper and lower roll (10,20) and fit and arrange, and the arc limit section circumferencial direction of cambered plate (10A, 20A) connects the embedding layout that postpones.
8. the rolling device of rod member forging blank according to claim 7, it is characterized in that: cambered plate (10A, two ends 20A) and be positioned at rolling surface (11, 21) arranged outside has installing hole, described is upper, bottom roll (10, 20) upper correspondence offers mounting groove (12, 23), described mounting groove (12, 23) flute length direction and roll (10, 20) roller length direction is parallel, mounting groove (12, 23) be the T-slot of closing in shape, installing hole is equipped with construction bolt, the end head of construction bolt stretches into mounting groove (12, 23) bottom land of large end and fixing with the nut in bottom land.
9. a forming method for rod member as claimed in claim 1, it comprises the following steps:
A), blanking, will the wire and rod raw material of rod member be made cut into the steel ingot blank of segment;
B), to steel ingot blank carry out high-temperature heating, be heated into the red steel state being convenient to rolling;
C), by the red steel ingot after heating import rolling device, roll out the forging blank of rod member to be formed;
D), by the forging blank of the rod member to be formed rolled out import in the die cavity in die forging machine, die forging machine work is also suppressed the forging blank in die cavity;
E), by the blank after compacting in die forging chamber take out and carry out trimming process, and finally obtain into flat rod member.
10. rod member forming method according to claim 8, is characterized in that: the steel ingot blank of described cutting is cylindric, and the length of steel ingot blank is 345mm, diameter is 42mm; The heating-up temperature of described steel ingot blank is 1000 DEG C ~ 1100 DEG C, heat time 35s ~ 45s; Red steel ingot after described heating imports extruding force 155T ~ 165T that rolling device applies, extrusion time 2s ~ 2.2s.
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| CN116351880A (en) * | 2023-03-09 | 2023-06-30 | 中国机械总院集团北京机电研究所有限公司 | Rolling die heating method and rolling processing system with heating function |
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| CN112743017A (en) * | 2020-12-16 | 2021-05-04 | 辽宁科技大学 | Rolling and forging combined production method |
| CN112743017B (en) * | 2020-12-16 | 2022-12-06 | 辽宁科技大学 | Rolling and forging combined production method |
| CN116351880A (en) * | 2023-03-09 | 2023-06-30 | 中国机械总院集团北京机电研究所有限公司 | Rolling die heating method and rolling processing system with heating function |
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Application publication date: 20150624 |