CN85202080U

CN85202080U - Adjustable three rolls cold rolling will for threaded rod

Info

Publication number: CN85202080U
Application number: CN 85202080
Authority: CN
Inventors: 刘天民
Original assignee: Individual
Current assignee: Individual
Priority date: 1985-06-05
Filing date: 1985-06-05
Publication date: 1986-08-13

Abstract

The utility model provides an adjustable three rolls cold rolling can for threaded rod, which is composed of a transmission system (comprises a structural assembly of a triaxial outputting positive gear driving box which can rotate clockwise and counter clockwise and, and an improved rolling head box of a ring-shaped roll), adds a fine adjustment device for rotary angle of rolls, and the accessories of the fine adjustment device for rotary angle of rolls. Because of the adjustment type, the utility model has the advantages of simple, reliable and low cost on exclusive use rolling mills, and also has the advantages of the universality of universal mills. The utility model can also roll various screw rods below phi 45 by a helical-shaped mill and a ring-shaped mill, the high precision is obtained, and is particularly non-self-locking screw rods which can obtains high precision.

Description

Adjustable three roller screw rod cold-rolling mills

The utility model relate to a kind of special use but be adjustable metal screw cold-rolling mill product simple in structure.Can realize using three spiral rolls or the cold rolling work of screw rod initiatively of ring-type roll roller.Extraordinary non-self-locking screw rod and other φ various screw rods below 45 in rolling example of energy.

Existing screw rod cold rolling process, domestic ring-type roll, the three-roll rolling all used; Abroad then with helical form and two kinds of rolls of ring-type and two rollers and two kinds of rolling modes of three rollers.The roll rolling screw rod of helical form roll initiatively can obtain more high accuracy, and three rollers always the effect of rolling than two rollers is good.

Existing universal mill is made up of the dog of two or three interlocks (mostly being worm speed-down) respectively mostly, and each dog can independently be adjusted angle and radial dimension, and tonnage design on demand has radial oil cylinders.Such milling train versatility height, efficient height, but it is many to adjust mobile link, several angle is also wanted manual setting, if three cold mills, structure is just more complicated.Belong to this type of as the homemade three-high mill of Yunnan Machine Tool Factory No.3, though use the ring-type roller, owing to roller active, three rollers, so rolling accuracy is higher.France ESCOFIER milling train and domestic life are built milling train that machinery plant produces and are all belonged to two rollers.The screw rod milling train of the Soviet Union (see Soviet Union's " speciality mill "---с п Е ц и А л ь н ь й CTOH one book), use the spur gear transmission case, through the universal drive shaft transmission, the dog case is also as above-mentioned omnipotent.As: 2 * NB-30 is a diaxon, rolls not by screw rod, and two dogs return and shift near is to move by mechanical types such as motor worm, screw rods; And 3 * NB-30 is three, rolls by long bolt, and dog can not return automatically, but adjust be still omnipotent.Other sees Russian Patent application SU2475626(770417) and SU2390850(760719).

Domestic because of adopting the ring-type roll, do not need Synchronous Transmission.So make a kind of dog case that three constant tilt axis holes are arranged, be contained on the lathe slide carriage of having transformed, drive workpiece by lathe and be screwed in the roll pass and drive the roll rotation and shut out screw thread.If not by screw rod, then lathe counter-rotating, the dog case withdraws from workpiece.Because this dog case is special-purpose, no moving-member, there is not the link of adjustment, possible elasticity in the no hydraulic system, the uniformity height that parameters such as angle diameter obtain by process, precision height, realize Universal adjustable again easily after improving, so have simple, easily promote advantage such as stability is high, precision is high, and rigidity is big.So the factory (as Shanghai machine tool accessories six factories) that some has ready-made twin shaft milling train also uses the rolling in batch screw rod of this dog case.But the shortcoming of this dog case is: because workpiece initiatively, and transmit whole roll-forces, the torsional deformation of workpiece and internal stress are all very big, and reverse twist distortion again influences the rolled piece precision when returning; When rolling coarse pitch and multiple-threaded screw simultaneously, unit drafts and roll-force are bigger, are difficult to keep normally rolling, and precision is lower.Workpiece had both driven roll, drove planker again and moved, and workpiece screw thread withdrawing side thread form face fineness is reduced, and can not use the spiral roll in addition.Above-mentioned reason has limited the scope of application of this dog case.

The purpose of the utility model design is will be by with " textural association " method, and it is adjustable again to try to achieve a kind of special use, the simple and roll three roller screw rod cold-rolling mills initiatively that are easy to promote, and with rolling φ various screw rods below 45, the non-self-locking screw rod of particularly big helical pitch.

Task of the present utility model realizes as follows:

Utilize an above-mentioned ring-type rolling case that has improved, combine with custom-designed three transmissions of output synchronously, be contained on the lathe bed with cooling, manipulation and display system, add a cover custom-designed roll " corner micromatic setting ", a kind of like this " textural association " constitutes adjustable three cold mills.

" adjustable " of adjustable dog case refers to have the design concept that " can adjust " in the group technology.Can adorn φ 120-φ 180 rolls.Change when rolling another screw rod, adopt " more transferring method ", only change protecgulum, bonnet and the roll of dog case, and press scale and transfer eccentric bushing bearing to transfer footpath in the rolled piece.Another characteristics of dog case are: angle, and fixed diameter, no moving-member, counter-rotating is back-outed screw rod and is proofreaied and correct with finish rolling.Wherein: transmission comprises controllable silicon, direct current generator, transmission case, universal drive shaft and corner micromatic setting.Direct current generator thyristor speed control scope is: 750-2400 rev/min.Transmission case is a spur gear transmission, by the electromagnetic clutch conversion rotating of button or limit switch control, transmission case at last by a sun gear shaft drive three output shafts through universal drive shaft to the dog case, can guarantee the synchronous rotation of roll requirement.Sun gear shaft has the hollow hole of φ 48, can pass through this hole when rolling long bolt.Total reduction ratio: i ≈ 40～45 during i ≈ 65～70 counter-rotatings.

Corner micromatic setting one end is a spline housing, is coupled on universal drive shaft flange and the roll spline, and fine-tuning roll, its each tooth is operated in the same helicla flute of workpiece, the deficiency when assembling to remedy processing, this is called " corner fine setting ".

Also considered the thick smart filter of cooling fluid on milling train, the speed of rolls and moment of torsion show, and super torque protection etc. are arranged.

The situation that now exemplifies special-purpose helical form roll (rolling extraordinary non-self-locking screw rod) is as follows:

Extraordinary non-self-locking screw rod in this example is a product on the rolling stock, external diameter φ 28.5, internal diameter φ 24,4, spiral shell square 7, helical pitch 28mm, 17 ° 21 ' 57 of lead angle ", T shape tooth, 15 °-1 ° 30 of profile angle '; at the bottom of the spiral shell R1.5 arc; the land is angle, R0.5 garden, by screw rod, the long 755mm of threaded portion; material is No. 35 cold drawn steels, hardness HB172～200.On this milling train with roll forming of spiral roll (comprising external diameter and angle, R0.5 garden).So have big lead angle, bottom diameter of the roll is participated in rolling characteristics.According to these characteristics, definite roll particularity requires as follows:

(a) try to achieve the lead angle W=17 ° 50 ' of rolling diameter by conversion.

(b) roll is left-handed, and the inclination angle is unsuitable excessive.

(c) calculate roll spiral shell square with accurate method, and consider to interfere and rebound amount.Spiral shell square precision ± 0.005mm, 16 statures are easy to processing.

(d) oblique angle, footpath during the portion of nipping needs because finish rolling is proofreaied and correct when returning, so need two ends have the awl of nipping, nip bore the oblique angle can be bigger than normal, 3～4 °, correction unit should be lacked 15～25mm.

(e) can lack for 107mm(reality by general dog case requirement roll length overall).Each relative keyway center, roll increment face center unanimity is to guarantee the first reload request with corner.

Utilizing this roll on this milling train after adjusting, played the effect of a special rolling mill, make workpiece reach the requirement of Ministry of Railways's professional standard drawing.

Adopt the milling train of this " textural association ", simple, good stability, inexpensive.Be fit to promoting the use of of the general medium or small factory of China; And use " can adjust " this method, and make effect with special-purpose and universal mill, roll the one-shot forming of extraordinary non-self-locking screw rod.Embody the advantage of special rolling mill, the corner micromatic setting can be finely tuned " corner " rapidly in addition.

Below in conjunction with accompanying drawing, further specify structure and working condition is as follows:

(1) profile and layout: Fig. 1 is the milling train monnolithic case.Dress thyristor supply and control apparatus in the control square (1).Lathe bed (3) stage casing is a tank for coolant, and interior dress comprises the cooling system (9) of the powder metallurgy fine filter of 8 microns precision, dress magnetic separator (23) in the right-hand member, and display instrument panel (5) is at left front, and press button box (10) is in the right front.Transmission and all associate members are respectively by belt housing (2), and transmission shield (6) and housing (7) (11) (13) seal.Both safety made profile integrated again, and cooling fluid handle (14) is raised housing (11) and can be cleared up oil filter above housing.Grease proofing the flowing down of coaming plate (22) (see figure 2), the double lace (oxidation black) of doing.Milling train basis look can use light brown yellow, processes look with dark red sign and part metals.

(2) general structure: Fig. 2 is a structure overview.Power reaches transmission case (4) by motor (51) by V belt, slow down and change rotating and output by seven axles in the case, through three universal drive shafts (17) and two corner micromatic settings (18), an adpting flange (19) is passed to three roll mandrels (31) of dog case (8), workpiece stretches into dog case forward rolling (breaking down) from right-hand member by fore-stock (12) (in adorn interchangeable cover), pass through support, running into can be with the rotation collision block (16) of workpiece rotation (in rolling bearing is arranged), make it depress micro limit switch, so the commutation of the electromagnetic clutch on transmission case I axle counter-rotating, also make workpiece oppositely rolling (making with extra care), treat that workpiece all withdraws from the dog case and stops the rotation, can extract workpiece out.Protecgulum (21) and bonnet are the exchangeable parts of dog case, only unload protecgulum (21) when changing roll and get final product, and roll another kind of workpiece if change, and then will change protecgulum (21) and bonnet (20) simultaneously.

Fig. 3 is vertical partial sectional view of roll mandrel.Two dials (34) at two ends have four fish eyelets, it can be rotated down at gland (33), unscrew the fastening bolt (32) (only unclamp and do not unload) of totally six glands (33), equidirectional rotation two dials (34) can drive two eccentric bushing bearings (35) rotations, with path transfer to size.Eccentric bushing bearing is the overall package part, no inner ring, the also eccentric 1mm of outer ring offset 0.5mm().Mass runoff 1～2mm in 180 ° of adjustable workpiece of revolution promptly compresses gland (33) again after mixing up.Roll mandrel (31) has involute spline, the center of a spline of keyway centrally aligned of its dress roll, and mill out the square groove of a 4 * 20mm along axis in the end of this spline teeth groove, the garden pin (7) that this groove must be aimed on the corner micromatic setting spline housing is packed into, to guarantee the equidirectional of roll corner.When unloading protecgulum (21) and bonnet (20), be screwed into by three screws that respectively cover, protecgulum, bonnet can withdraw from body.

Fig. 4 is the partial sectional view of roll, it (36) schematic diagram when installing and using for it among Fig. 3.

(3) corner micromatic setting:

(a) duty: Fig. 5 is the duty of corner micromatic setting, inlaying two retainingf keys (51) of symmetry on fixed disk (44) end face, movable disk (45) end face has wide wedge-like groove, under the retainingf key (51) in the wedge groove placed in the middle between, and between the both sides of groove and key, respectively adorn the draw key (48,49) of a wedge shape cambered surface, totally 4 draw keys force it to abut in all the time between wedge groove and the retainingf key by the effect of two springs (52).Two screws (50) during work on two draw keys are screwed in two keys, and the screw end face withstands opposite two draw keys, so 4 draw keys are all held out against.Two bolts (41) are fastening simultaneously, and making fixed disk (44) and movable disk (45) is one.

The spline housing of movable disk (45) is connected with the roll mandrel spline, and the garden pin (47) on it is aimed at a square groove on the splined shaft.

(b) free state: unload two screws (50).Firmly press draw key (48,49), then press bayonet lock (42,43) withdrawal, and block draw key and can not eject, four keys are pressed entirely, and unclamp the bolt (41) (only become flexible and do not unload) of band spring washer, then are free state.

(c) enter the adjustment of duty: during free state standard thread amount post is screwed in the roll pass, the crawl milling train amount of making post is just changeing 1～2 circle again.(being all active side contacts of output gear) opens two long handle bayonet locks (43) i.e. " a " " c " then, and this two draw key ejects earlier.Promptly hold out against two screws (50), open in addition two short handle bayonet locks (42) i.e. " b " " d " again, tighten two screws (50) once more, at last fastening two bolts (41).Then install in running order.

The operating process of equipment is that preparation comprises the cleaning coolant filter, startup milling train, inspection rotating speed, spacing action, lubricated and coolant rate and adjustment.(2) rolling workpiece: workpiece light embryo stretches in the dog case pass by fore-stock, i.e. automatically open rolling, bump limit switch to regulation length after, withdraw from automatically.If roll by screw rod, then unload lower limit, workpiece passes through from the transmission case central shaft hole.(3) Work inspection device.

Claims

1, on a lathe bed [3], adorning three roller screw rod milling trains of a cover transmission system (comprising motor [15] and universal drive shaft [17]) and dog [8]; it is characterized in that this transmission system is (by controllable silicon direct current generator speed change; spur gear transmission case [4] slows down) with " textural association " of an adjustable dog case [8]; also increase corner micromatic setting [18], comprised the cooling system [9] of fine filtering device and the display instrument panel [5] and the torque protection of speed and moment of torsion.

2, according to the milling train of claim 1 regulation, it is characterized in that spur gear transmission case (4) has the electromagnetic clutch of controlling forward and backward, and its sun gear shaft has the hollow hole of φ 48.

3, according to the milling train of claim, 1 regulation, 5.5 kilowatts of it is characterized in that the power when direct current generator is 750 rev/mins is.

4,, it is characterized in that having in the cooling system (9) the powder metallurgy oil filter and the magnetic separator (23) of 8 microns precision according to the milling train of claim 1 regulation.

5, according to the milling train of claim 1 regulation, it is characterized in that having the speed of rolls and show and moment of torsion Displaying Meter (5), and self-stopping control device when 1.5 times of super moments of torsion are arranged.

6, according to the milling train of claim 1 regulation, it is characterized in that protecgulum (21) and the bonnet (20) on the dog case (8) is removable, and respectively have three to eject screw that can adorn roller diameter is φ 120-180.Change the neither replacing of all the other each parts when rolling workpiece.

7,, it is characterized in that the no inner ring of eccentric bushing bearing (35) of overall package, 0.5～1 millimeter of outer ring offset according to the milling train of claim 1 or 6 regulations.

8, according to the milling train of claim 1 regulation, it is characterized in that the dial (34) on the dog case (8) has four fish eyelets.

9,, it is characterized in that having on the roll mandrel (31) 4 * 20 millimeter the square groove of assurance by dress direction unanimity according to claim 1 or 6 milling trains that require.

10, the milling train of stipulating according to claim 1, it is characterized in that corner micromatic setting (18) mainly is by fixed disk (44), movable disk (45), two retainingf keys (51), four draw keys (48) (49), two springs (52), the structure that two screws (50) and four card Xiao (42) (43) etc. are formed, and the method for adjustment from the free state to the duty.

11, as example, the extraordinary non-self-locking screw rod of available this mill milling, roll (36) is special-purpose, the particularity that it is characterized in that roller parameter, also be: 16 statures, there is the awl of nipping at 3 °～4 ° at oblique angle, middle footpath at two ends, proofread and correct 15～25 millimeters of ministers, and three each teeth of roll are with respect to its keyway position basically identical.The rolling lead angle that converts be 17 ° 50 '.

12, according to the milling trains of claim 1 and 11 regulations with after roll (36) adjusts in accordance with regulations, it is characterized in that constituting a special rolling mill, the sun gear shaft of transmission case can not be hollow also at this moment.