阅读说明：本技术 一种方u型螺栓弯曲成型的方法、装置 (A kind of method, apparatus of side's U-bolt brake forming ) 是由 李旭军 张利军 郭俊文 闫国生 杨继锋 姜海龙 张曙娟 张丽萍 范玉树 李菲菲 于 2019-08-29 设计创作，主要内容包括：本发明涉及一种U型螺栓弯曲成型的方法,属于机械加工技术领域；对零件弯角中心两侧<Image he="121" wi="496" file="DDA0002183360890000011.GIF" imgContent="drawing" imgFormat="GIF" orientation="portrait" inline="no"></Image>范围加热,其中,R为弯曲内角半径,d为螺栓直径,A为零件材料伸长率；控制零件的加热温度在(Ac3+30℃)—(Ac3+100℃)范围内,其中,Ac3为零件材料奥氏体相变温度；在保证弯角不变形情况下控制弯曲成型时间在K×d秒范围内,其中,K＝1—1.3；控制冷却速度为80—120℃/小时；冷却时用石棉布包裹后空冷；弯曲成型时使用U型螺栓弯曲成型装置弯曲而成,保证弯角处不变形。对比已有技术,本发明优化了方U型螺栓弯曲工艺,减少了方U型螺栓开裂的几率,保证了弯曲圆角外形尺寸要求,改善了方U型螺栓的质量,提高了生产效率,保障了生产进度,单品成型合格率达90％以上。(The present invention relates to a kind of methods of U-bolt brake forming, belong to technical field of mechanical processing；To part bent angle center two sides Range heating, wherein R is angular radius in being bent, and d is the diameter of bolt, and A is part material elongation；The heating temperature of part is controlled in (Ac3+30 DEG C)-(Ac3+100 DEG C) range, wherein Ac3 is part material austenite transition temperature；The brake forming time is controlled in the case where guaranteeing the indeformable situation of bent angle in K × d seconds ranges, wherein K=1-1.3；Controlling cooling velocity is 80-120 DEG C/h；It is air-cooled after being wrapped up when cooling with asbestos cloth；It is bent when brake forming using U-bolt bend molding apparatus, guarantees that corner is indeformable.Prior art is compared, present invention optimizes square U-bolt bending process, the probabilities of the side's of reducing U-bolt cracking, it ensure that the requirement of curved radius outer dimension, the quality of the side's of improving U-bolt improves production efficiency, ensure that manufacturing schedule, single-item form qualification rate up to 90% or more.)

1. a kind of method of side's U-bolt brake forming, it is characterised in that: the following steps are included:

(1) to part bent angle center two sidesRange heating；Wherein, R is angular radius in being bent, and d is The diameter of bolt, A are part material elongation；

(2) heating temperature of part is controlled in (Ac3+30 DEG C)-(Ac3+100 DEG C) range, wherein Ac3 is that part material is difficult to understand Family name's body phase transition temperature；

(3) the brake forming time is controlled in the case where guaranteeing the indeformable situation of bent angle in K × d seconds ranges, wherein K=1-1.3；

(4) control cooling velocity is 80-120 DEG C/h.

2. according to the method described in claim 1, it is characterized by: it is described be cooled to it is cold in air after being wrapped up with asbestos cloth But.

3. according to the method described in claim 1, it is characterized by: the part is 40Cr.

4. method according to claim 1 to 3, it is characterised in that: the brake forming is that user's U-bolt is curved Bent molding machine is bent, and corner is indeformable.

5. a kind of device of side's U-bolt brake forming, it is characterised in that: pedestal (2), rotating disk (3), newel (4), rod column I (8), rod column II (9), support frame (5)；Rotating disk is attached achievable rotary motion by bearing and pedestal, newel with The connection of rotating disk maintenance, by support frame groove maintenance part (1) one end, the part other end passes through on newel and rod column I Groove maintenance, applies active force to rotating disk when brake forming it is made to make rotary motion and drive part rotation, part newel, It is bent under rod column I, II synergy of rod column around newel equal diameter.

6. device according to claim 5, it is characterised in that: be uniform force when making spares bend, opened up on rod column II Groove.

7. device according to claim 5, it is characterised in that: for the processing for adapting to different model part, described device is also Including vertical plate (10), rod column I and rod column II are connect by adjusting bolt (7) with one piece of vertical plate maintenance respectively, by adjusting bolt The adjusting of front-rear position, adjust rod column I, rod column II and newel center away from.

8. according to any device of claim 5-7, it is characterised in that: for the determination for simplifying bending point, described device is also Including limiting device (6), when part end is seated in limiting device, the point between rod column I and newel is as curved Qu Dian.

9. device according to claim 8, it is characterised in that: the limiting device is equipped with muti-piece limit plate, uses respectively In the determination of differently curved point.

10. device according to claim 8, it is characterised in that: the limiting device is equipped with scale and limit plate, passes through Mobile limit plate is used for the determination of differently curved point to different position of rule.

Technical field

The invention belongs to technical field of mechanical processing, be related to a kind of bolts bend forming method and device, in particular to one The method and device of kind side's U-bolt brake forming.

Background technique

Square U-bolt is the locking device (as shown in Figure 1) of my connection of company's product chassis girder and auxiliary girder, and effect is It prevents vehicle when turning, weight bearing, is subjected to displacement.

Due to the particularity of be locked design of part and shape, square U-bolt need to be designed to R10 curved transitions arc, still The risk of the manufacture difficulty of the side's of will increase U-bolt and knee cracking.

Qualification rate is manufactured for guarantor's U-bolt, improves production efficiency, it is necessary to be explored a set of suitable for R10 curved transitions The square U-bolt bending and molding method of arc.

Summary of the invention

The purpose of the invention is to overcome the limitation of prior art, the small curved transitions arc of solution party's U-bolt causes curved The manufacturing issue of song cracking, a kind of method for proposing side's U-bolt brake forming.

The purpose of the present invention is what is be achieved through the following technical solutions.

A kind of method of side's U-bolt brake forming, comprising the following steps:

(1) to part bent angle center two sidesRange heating；Wherein: R is bending interior angle half Diameter, d are the diameter of bolt, and A is part material elongation；

(2) heating temperature of part is controlled in (Ac3+30 DEG C)-(Ac3+100 DEG C) range, and wherein Ac3 is part material Expect austenite transition temperature；

(3) the brake forming time is controlled in the case where guaranteeing the indeformable situation of bent angle in K × d seconds ranges；Wherein, K=1- 1.3；

(4) control cooling velocity is 80-120 DEG C/h.

Preferably, described be cooled to cool down in air after being wrapped up with asbestos cloth.

Preferably, the part is 40Cr.

Preferably, the brake forming is that user's U-bolt bend molding apparatus is bent, corner is constant Shape.

A kind of device of side's U-bolt brake forming, including；Pedestal, rotating disk, newel, rod column I, rod column II, support Frame；Rotating disk is attached achievable rotary motion by bearing and pedestal, and newel is connect with rotating disk maintenance, passes through support Frame groove maintenance part one end, the part other end is by the groove maintenance on newel and rod column I, to rotating disk when brake forming Applying active force makes it make rotary motion drive part rotation, and part surrounds under newel, rod column I, II synergy of rod column The bending of newel equal diameter.

Preferably, being uniform force when making spares bend, groove is opened up on rod column II.

Preferably, described device further includes vertical plate, and rod column I and rod column II divide to adapt to the processing of different model part Bolt Tong Guo not adjusted to connect with one piece of vertical plate maintenance, by adjusting the adjusting of bolt front-rear position, adjust rod column I, rod column II With the center of newel away from.

Preferably, described device further includes limiting device, when part end is seated in limit to simplify the determination of bending point When the device of position, the point between rod column I and newel is bending point.

Preferably, the limiting device is equipped with muti-piece limit plate, it is respectively used to the determination of differently curved point.

Preferably, the limiting device is equipped with scale and limit plate, pass through mobile limit plate to different position of rule Determination for differently curved point.

Beneficial effect

Compare the prior art, the method for side's U-bolt brake forming proposed by the present invention, the bending of the side's of optimizing U-bolt Technique, the probability of the side's of reducing U-bolt cracking ensure that the requirement of curved radius outer dimension, the matter of the side's of improving U-bolt Amount, improves production efficiency, has ensured that manufacturing schedule, single-item form qualification rate up to 90% or more.

Detailed description of the invention

Fig. 1 is square U-bolt working state schematic representation；

Fig. 2 is a kind of device front view of side's U-bolt brake forming of the embodiment of the present invention；

Fig. 3 is a kind of device rearview of side's U-bolt brake forming；

Appended drawing reference: 1- part, 2- pedestal, 3- rotating disk, 4- newel, 5- support frame, 6- limiting device, 7- adjust spiral shell Bolt, 8- rod column I, 9- rod column II, 10- vertical plate.

Specific embodiment

The preferred embodiment of the present invention is described in detail with embodiment with reference to the accompanying drawing.

Below to illustrate the method for side's U-bolt brake forming a kind of for the 40Cr material for being bent interior angle R10, in it is not lend oneself to worry and anxiety Degree be 100mm, the method for the present invention the following steps are included:

(1) heated perimeter is controlled；

By field test using brake forming under different temperatures, bending heating temperature is determined by molding qualification rate.

(2) heated perimeter is controlled:

It is formed by field test using different heating curved in length, bending heated perimeter is determined by molding qualification rate.

(3) rate of bending is controlled:

Different time brake forming is used by field test, the bending time is determined by molding qualification rate.

(4) type of cooling is determined:

It takes the mode Slow cooling of asbestos cloth package to replace air-cooled, passes through magnetic powder detection cracking situation and determine cooling Mode examines its qualification rate to determine the type of cooling by engineer testing.

In conclusion the square U-bolt of the 40Cr steel machining center length 100mm based on bending interior angle R10 is bent to Type method, including the following contents:

Controlling heating temperature is 810 DEG C~880 DEG C (being at this time in shiny red), to part bent angle center two sides 41-50mm model Heating is enclosed, the brake forming time is controlled in the case where guaranteeing the indeformable situation of bent angle in 18-23s, is wrapped up with asbestos cloth with 80 --- 120 DEG C/h of speed Slow cooling forms qualification rate up to 90% or more.

It should ensure that corner uniform force is indeformable when brake forming.

The above process by making part reach austenitic state in heated condition, in this case part have it is good can Plasticity, and then interior angle R10 brake forming and the cooling under suitable speed are carried out under certain speed to part, it can effectively solve The certainly bent angle problem of Cracking of interior angle R10 brake forming, the hardness of steel of corner when guarantor's U-bolt uses.

Further, corner uniform force can ensure that by using the device of square U-bolt brake forming, bent angle is constant Shape, and then the hardness of steel of guarantor's U-bolt corner.

A kind of device of side's U-bolt brake forming, including；Pedestal, rotating disk, newel, rod column I, rod column II, support Frame；Pedestal is fixed plate, and rotating disk is attached achievable rotary motion, newel and rotating disk maintenance by bearing and pedestal Connection, by support frame groove maintenance part one end, the part other end passes through the groove maintenance on newel and rod column I, rod column I In the same horizontal line and parallel with part with II center of rod column, applying active force to rotating disk when brake forming turns round it Movement drives part rotation, and part is bent under newel, rod column I, II synergy of rod column around newel equal diameter.Pass through The restriction of rod column I ensure that part is indeformable in knee, and then ensure that the stiffness in U-bolt knee.

Preferably, being uniform force when making spares bend, groove is opened up on rod column II.

Preferably, to make part stress that position play not occur when being bent, rod column II is equipped with two pieces of protrusive boards, part is limited In protrusive board.

Preferably, described device further includes vertical plate I and vertical plate II, I He of rod column to adapt to the processing of different model part Rod column II is connect by bolt with vertical plate I and vertical plate II maintenance respectively, by the adjusting of bolt front-rear position, adjusts rod column I, rod The center of column II and newel away from.The vertical plate being connected with rod column I can be both installed in rotating disk with maintenance, can also be installed with maintenance In on pedestal.When being installed in rotating disk, rod column I and newel are rotated with rotating disk together, mistake of the rod column I in spares bend The forced contact point of Cheng Zhongyu part is constant.When being mounted on the base, newel is rotated with rotating disk, and rod column I is curved in part Constantly change in bent process with the forced contact point of part, gives inside support point by point from outer rim to spares bend position Power.II position of rod column is constant always, and not with the rotation of rotating disk, change location overcomes torsion during spares bend always Square provides the inside support force of part, guarantees that part is bent by angle is subscribed.Fig. 2 and structure shown in Fig. 3 are former using lever Reason circumferentially pushes stock to drive the bending of rotating disk rotation realization part by stretching out a stock in rotating disk.It is not limited to This, can also rotate the bending for realizing part by motor control rotating disk.

Preferably, described device further includes limiting device, when part end is seated in limit to simplify the determination of bending point When the device of position, the point between rod column I and newel is bending point.

Preferably, the limiting device is equipped with muti-piece limit plate, it is respectively used to the determination of differently curved point, limit plate Position can be seated in predeterminated position using movable connection method, such as by adjusting bolt maintenance, or pass through card slot maintenance etc..

Preferably, the limiting device is equipped with scale and limit plate, pass through mobile limit plate to different position of rule Determination for differently curved point.If limit plate is equipped with groove, by sliding back and forth mobile position on limiting device both side plate It sets, after limit plate is slided into predetermined position by the scale being located on side plate, by adjusting bolt maintenance.

As shown in Figure 2,3, a kind of device of U-bolt brake forming, including；Part 1, pedestal 2, rotating disk 3, newel 4, support frame 5, limiting device 6, adjusting bolt 7, rod column I 8, rod column II 9, vertical plate 10.Wherein, pedestal 2 is fixed plate, rotating disk It is attached realization rotary motion by bearing and fixed plate, rod column I, II is connect by vertical plate and adjusting bolt with pedestal, and Back-and-forth motion can be realized by adjusting bolt, to adjust the spacing with center intercolumniation, newel is connect with rotating disc fastener, work Spares bend size is fixed by limiting device when making, applying active force to rotating disk makes it make rotary motion drive part rotation Turn, part is bent under newel, rod column I, II synergy of rod column around newel equal diameter.

Pedestal 2 is fixed, is connect with rotating disk 3 by bearing, plays connection, supporting role；It will be stood by welding manner Plate 10 is fixed on pedestal, and the one end for adjusting bolt 7 is welded and fixed with rod column I 8, rod column II 9 respectively by welding manner, adjusts The other end of section bolt 7 is threadedly coupled with vertical plate 10, realizes fine adjustment function, adjusts rod column I, rod column II in by adjusting bolt Gap between stem.When being bent work, relative motion does not occur for rod column I 8, rod column II 9 and fixing seat.Rotating disk 3 and pedestal Make opposite rotary motion, power when bending is provided；Newel 4, which is connected through a screw thread, to be fixed in rotating disk 3, rotating disk and solid Reservation is connected by bearing drives newel 4 and rod column I 8, rod column II 9 that opposite rotary motion occurs at work.Support frame 5, Play guide support at work.Limiting device 6, in the accurate control bending size of work.

Bending process: rotation rotating disk, newel rotate with it, and the gap adjusted between part and newel, rod column I makes Its leading portion moves under frictional force effect along newel gyratory directions, and part rear end keeps former direction under II reaction force of rod column State rotates 90 ° according to rotating disk in this way, and the leading portion of part just forms 90 ° of bending angle with back segment.

Rotation speed by controlling above-mentioned rotating disk can control part to be rotated by 90 ° within the scope of certain time.

Although combining attached drawing describes embodiments of the present invention, it will be apparent to those skilled in the art that not Under the premise of being detached from the principle of the invention, various modifications and improvements can be made, these also should be regarded as belonging to protection of the invention Range.