CN2834737Y

CN2834737Y - Improved bar connected punch structure

Info

Publication number: CN2834737Y
Application number: CN 200520119195
Authority: CN
Inventors: 陈源和
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-09-21
Filing date: 2005-09-21
Publication date: 2006-11-08
Anticipated expiration: 2015-09-21

Abstract

The utility model discloses an improved connecting rod type punching machine structure. A first connecting rod is arranged above a machine frame, and the lower end of the first connecting rod is connected with a second connecting rod. An opening which is arranged in the central position of the second connecting rod is sheathed on an eccentric shaft, and the lower end of the second connecting rod is connected with a third connecting rod, the lower end of which is combined with an adjusting screw which is connected with a screw fixing seat. The upper edge of the fixing seat is locked with an upper slide block. Thus, the running of the eccentric shaft drives the second connecting rod to follow the variation of the eccentric circumferential distance of the eccentric shaft to actuate up and down, and the second connecting rod drives the first connecting rod and the third connecting rod to generate swinging movement up and down and from top to bottom. The purposes of extending stroke time, slowly shifting angles, shortening return time, quickly shifting the angles and altering stroke curves can be achieved through the condition that the connecting length and angle of the three connecting rods generates the variation of swinging angles.

Description

Improved link-type punching machine structure

Technical field

The utility model relates to a kind of improved link-type punching machine structure, especially refer to that a kind of actuating travel up and down that forges punching press at punch press improves, improvement via structure, utilize eccentric shaft to cooperate the connection length of three connecting rods and the variation that angle produces pendulum angle, and reach the stroke time lengthening, angular shift is slower, shorten return interval, angular shift is very fast, changes its stroke curve, to utilize the demand of stamping press.

Background technology

The development of industrial technology, the breakthrough of being devoted to technological layer invariably progresses greatly, thereby promote the precision of product and the requirement of quality, to be widely used in the manufacturing of each journey mechanical component of hand-held tool or steam turbine car and hardware at present, major part is the purpose that reaches moulding in utilizing the technology of forging punching press, thereby how to make finished product meet the requirement of precision, be to endeavour to research and develop the emphasis of punch press machinery and the target of pursuit for the dealer.

Known punch press (please cooperate and consult shown in Fig. 1,2), its structural design mainly is to utilize drive motor 10 to drive belt pulley 11, and interlock flywheel 12 impels crank axle 13 to rotate, 13 central authorities articulate a connecting rod 14 in crank axle, this connecting rod 14 connects establishes a ball screw rod 15, and this ball screw rod 15 is engaged in slide block 17 by a screw rod holder 16; When crank axle 13 rotates, promptly, be start up and down, reach the purpose that forges the presser crop and make connecting rod 14 drive ball screw rod 15 by the eccentric circumference variable in distance of arbor 13.

But, above-mentioned crank axle punch press, because of structure Design in the operation that forges punching press, easily form following disappearance; I.e. forging with regard to the stamping press with regard to punch press, the fall time of stroke is longer, then the ductility of working substance and precision are better, so see it (please cooperate consult shown in Figure 5) with regard to the actuating travel of crank axle punch press, its stroke is identical with the time that backhaul is risen fall time, in other words, be the stroke of crank axle punch press in start about in the of, it is to expend in backhaul vertical motion like water off a duck's back that half the time is arranged, relatively, just can't obtain splendid ductility and precision for forging on the stamping press of working substance, if desire to try to achieve precision to a certain degree, then punching press number of times that forges of start just must be to increase about it, thus, not only expend man-hour, the finished product disqualification rate also will promote, and the life-span of mould is relative shortening.

Summary of the invention

Main purpose of the present utility model provides a kind of improved link-type punching machine structure, it utilizes eccentric shaft to cooperate the connection length of three connecting rods and the variation of angle, under the constant principle of journey time, prolong its stroke fall time, relatively shorten its backhaul rise time, make its in carry out working substance forge stamping press the time can obtain preferable ductility and precision, the suitable plastic working operation of extending, and can reduce the finished product disqualification rate, promote die life.

Another purpose of the present utility model provides a kind of improved link-type punching machine structure, its circular motion by eccentric shaft drives second connecting rod and produces start up and down with the variation of eccentric circumferential distance, and by second connecting rod drive first connecting rod and third connecting rod generation oscillating motion up and down, and reach the stroke time lengthening, angular shift is slower, shorten return interval, angular shift is very fast, changes the purpose of its stroke curve.

For this reason, the utility model proposes a kind of improved link-type punching machine structure, its first connecting rod that is pivoted in the frame top, link second connecting rod in the first connecting rod lower end, and the perforate of second connecting rod central part is set on the eccentric shaft, connects third connecting rod in the second connecting rod lower end, and the third connecting rod lower end is again in conjunction with adjusting screw rod, adjust screw rod and rejoin, and holder is locked slide block again in the screw rod holder; The structure of Zu Chenging according to this, because of second connecting rod slightly triangular in shape, when cooperating first connecting rod and third connecting rod to be pivoted, three connecting rods form the bent axle effect, cooperate the setting of eccentric shaft, when motor transmission eccentric shaft turns round, drive second connecting rod by eccentric shaft and produce start up and down with the variation of eccentric circumferential distance, and by second connecting rod drive first connecting rod and third connecting rod generation swing up and down, and then make its punching stroke make moving curve changing with the connection length of three connecting rods and the variation of pendulum angle, make the time lengthening of its stroke and angle displacement is slower, shorten return interval and angle displacement is very fast, in order to the demand of stamping press.

Therefore, the utility model utilizes eccentric shaft to cooperate the connection length of three connecting rods and the variation of pendulum angle, prolongs stroke fall time and angle displacement is slowed down and reach, and makes it be more suitable for the plastic working operation of extending, and can reduce the finished product disqualification rate, promote the service life of mould.

Description of drawings

Fig. 1 is the structural representation of known crank axle punch press.

Fig. 2 is the three-dimensional cutaway view of known crank axle punching machine structure.

Fig. 3 is a structural relation schematic diagram of the present utility model.

Fig. 4 is STRUCTURE DECOMPOSITION figure of the present utility model.

Fig. 5 is the stroke curve figure of the utility model and crank axle punch press.

Fig. 6 is the time-displacement curve figure of the utility model and crank axle punch press.

Fig. 7 is the power curve figure of the utility model and crank axle punch press.

Fig. 8 is the speed curve diagram of the utility model and crank axle punch press.

Description of reference numerals:

10....... motor 11....... belt pulley

12....... flywheel 13....... crank axle

14....... connecting rod 15...... ball screw rod

16...... holder 17........ slide block

20...... eccentric shaft 21...... first connecting rod

22..... second connecting rod 23...... third connecting rod

24..... adjust screw rod 25..... screw rod holder

26....... slide block 27........ perforate

30....... frame

The specific embodiment

See also Fig. 3 structural relation schematic diagram of the present utility model and Fig. 4 STRUCTURE DECOMPOSITION figure of the present utility model, it mainly comprises an eccentric shaft 20, three connecting

rods

21,22,23, adjust screw rod 24, screw rod holder 25 and slide block 26 etc., on structure is formed is to make first connecting rod 21 upper ends be hubbed at frame 30 tops, link second connecting rod 22 in first connecting rod 21 lower ends, the perforate 27 of second connecting rod 22 central parts is set on the eccentric shaft 20, second connecting rod 22 lower ends connect third connecting rod 23, third connecting rod 23 lower ends are again in conjunction with adjusting screw rod 24, adjust screw rod 24 and rejoin, and screw rod holder 25 is locked slide block 26 again in screw rod holder 25; The structure of Zu Chenging according to this, because of second connecting rod 22 slightly triangular in shape, when it cooperates first connecting rod 21 and third connecting rod 23 to be pivoted, make three connecting

rods

21,22,23 is misaligned and form the bent axle effect, cooperate the setting of this eccentric shaft 20, when 20 runnings of motor transmission eccentric shaft, drive second connecting rods 22 by eccentric shaft 20 and produce start up and down with the variation of eccentric circumferential distance, and by second connecting rod 22 drive first connecting rods 21 and third connecting rod 23 generation swings up and down, and then on the stroke that forges punching press, what make stroke makes moving curve with three connecting

rods

21,22,23 the connection length and the variation of pendulum angle and change, make the time lengthening of its stroke and angle displacement is slower, shorten return interval and angle displacement is very fast, thus in ductility and the precision that to promote working substance on the stamping press because of the stroke time lengthening that forges to working substance, make it be more suitable for the plastic working operation of extending, and can reduce the finished product disqualification rate, promote die life.

Hereby again with the characteristic of link-type punch press of the present utility model and known crank axle punch press relatively as after:

One, the stroke curve of link-type punch press increases in the stroke decline curve than the stroke curve of crank axle punch press Add about 38 degree, and the backhaul decline curve also shortens, as shown in Figure 5, i.e. and the stroke angle of link-type punch press The degree displacement is slower, and the backhaul angle displacement is very fast.

Two, the variation of the speed of link-type punch press when advancing is little than the crank axle punch press, and its stroke descends Curve approaches movement at the uniform velocity, as shown in Figure 6, and in same period, the stroke interval of link-type punch press Prolong and relatively shorten return interval.

Three, link-type punch press pressure capacity scope is big than the crank axle punch press, as shown in Figure 7, i.e. and link-type Punch press can be given the better ductility of working substance and precision in carrying out the forging on the stamping press of working substance Degree.

Four, the link-type punch press allows that the operating area is bigger than crank axle punch press, angle as shown in Figure 8 Change in displacement figure.

Five, the link-type punch press is used in the plastic working operation (taking out deeply) of extending, and is more suitable for than crank axle punch press, and can reduces the finished product disqualification rate in a large number, promotes die life.

When six, the link-type punch press forges and presses material, be the motion of nearly constant speed, so the bounce-back amplitude of vibration is less, noise relatively can obtain to lower.

In sum, the utility model utilizes eccentric shaft to cooperate the connection length of three connecting rods and the variation of pendulum angle, prolongs stroke fall time and angle displacement is slowed down and reach, and makes it be more suitable for the plastic working operation of extending, and can reduce the finished product disqualification rate, promote the service life of mould.

Claims

1, a kind of improved link-type punching machine structure, it is characterized in that, its first connecting rod that is pivoted in the frame top, link second connecting rod in this first connecting rod lower end, the perforate of this second connecting rod central part is set on the eccentric shaft, connects third connecting rod in this second connecting rod lower end, and this third connecting rod lower end is in conjunction with adjusting screw rod, this adjustment screw rod is engaged in the screw rod holder, and this holder is locked slide block; Described second connecting rod is triangular in shape, and cooperate the setting that is pivoted of first connecting rod and third connecting rod, above-mentioned three connecting rods form the bent axle setting, cooperate the setting of eccentric shaft, this eccentric shaft running of one motor transmission is provided with, described second connecting rod drives by eccentric shaft and is start setting up and down, and described first connecting rod and third connecting rod drive by second connecting rod and be the setting of bobbing and weaving.