CN86209942U - Rocking chip breaking device - Google Patents

Abstract

The utility model relates to a rocking chip breaking device that an edge inclination angle of a tool bit swings in cyclicity to cause the front angle and the rear angle of the tool bit to actually change in cyclicity for obtaining the purpose of chip breaking. Because the feed amounts of a tool tip at the swing center are constant, the problem of the lower machining precision of the original feed-changing chip breaking device is solved. The device has the advantages of reliable chip breaking performance and no reduction of machining precision; simultaneously, the screaming noise caused by self-induced vibration is eliminated. Therefore, the utility model is an ideal chip breaking device.

Description

Rocking chip breaking device

The utility model is a kind of blade to be housed, to be installed in the chip breaking device on the lathe.ICL is B23B27/22, B23B25/02.

The utility model is used for the chip breaking of the big-and-middle-sized part of machined into, is particularly useful for the chip breaking problem that solves turning high strength, high tenacity material.

Chip breaking device before the utility model adopts the method for opening chip-breaker on cutter more, and this method is simple.But chip breaking is unreliable, is subjected to influence that cutting data changes greatly, and the size of groove is difficult for grasping.Have in addition and adopt the chip breaking method that becomes the amount of feeding, as if application number is 85108062 patent application.Adopt the chip breaking method that becomes the amount of feeding,, the position of the thick vanishing of smear metal might occur, so chip breaking is reliable owing to the change of the amount of feeding.Realize that the method that becomes the amount of feeding has two kinds.A kind of is additional device on the basis of slide carriage course feed, and cutter relieving is done periodic motion, thereby superposes the one-period amount on direction of feed, reaches the purpose that becomes the amount of feeding.Another kind is the feed motion variation that lathe promotes slide carriage, makes slide carriage and knife rest integral body do the change feed motion.But, when adopting first method; At the slide carriage course feed, and during the feeding that the additional one-period of cutter changes,, influence the surface accuracy of workpiece when Chefei's Cylinder (as cone) because point of a knife,, will produce to gnaw and cut phenomenon in the normal position a certain instantaneous leading (or backwardness).And the employing second method; Slide carriage integral body is done the change feed motion, because the quality of slide carriage and knife rest is big, high frequency response is poor, thereby makes the precise decreasing of processing work.And, can influence copying accuracy for copying lathe.

The purpose of this utility model is to cut and reduce problem with surface accuracy and design for solve becoming feeding chip breaking device gnawing when the non-Cylinder of turning, and its chip breaking reliably and do not gnaw when the non-Cylinder of turning yet and cut phenomenon does not reduce the machining accuracy of workpiece.

The utility model has adopted and the different principle that becomes the feeding chip breaking, in working angles, the amount of feeding is invariable, but the cycle at tool inclination angle and actual forward and backward angle changes, thereby direction and depth of cut that smear metal is flowed out change (because anterior angle changes drift angle is changed, cause the variation of depth of cut).Simultaneously smear metal is stressed also changes, and flows out the back in smear metal and is got rid of disconnectedly, reaches the purpose of chip breaking.

Structure of the present utility model is installed integral installation as shown in Figure 1 in the position of former lathe saddle, replaces former tool post.This device is by blade (1), knife bar (2), power source (3), base (4) and be connected crank and rocker mechanism (5) composition of knife bar (2) and power source (3).Adding man-hour, lathe drives slide carriage and does normal normal value feed motion, after power source (3) rotates, by crank and rocker mechanism (5) knife bar (2) is done periodically and shaken, the drive blade (1) that shakes of knife bar (2) swings back and forth around the axis of knife bar (2), at this moment, point of a knife is positioned on the axis of knife bar (2), main cutting edge cutting edge inclination generating period changes, thereby makes the forward and backward angle of actual cut that variation all take place, and reaches the purpose of chip breaking.Point of a knife is not because on the axis of knife bar (2), its position changes, and to the also just basic not influence of the surface accuracy of workpiece, and chip breaking is reliable.

The utility model has been eliminated the noise of screaming because the continuous variation at the actual forward and backward angle of cutter has destroyed the self-excited vibration condition of cutter and workpiece, thereby no longer produced self-excited vibration, has improved work situation.Simultaneously,, improved the friction of back knife face and workpiece, the temperature rise of workpiece is reduced, improved machining accuracy because the cycle of the actual relief angle of cutter changes.

Crank of the present utility model can be the crank that can regulate its length.Like this by regulating the length of crank, change the amplitude of rocking bar angle of oscillation, to satisfy to the different workpieces material the best chip breaking amplitude of fluctuation value under the different cutting datas.

Crank and rocker mechanism in the utility model (5) can be a form as shown in Figure 2, crank can be made up of the garden dish (8) and the slide block (9) of an adjustable eccentric distance, rocking bar (6) can be fixed on the knife bar (2) by key (7), the other end of rocking bar (6) is a slideway, its slideway can be clamped a slide block (9) that is fixed on the garden dish (8), and the eccentric throw of slide block (9) on garden dish (8) can be adjusted by the position in T type groove.Garden dish (8) can be fixed on the power source (3), when power source (3) drive garden dish (8) rotates, because the off-centre of slide block makes rocking bar (6) swing.By regulating eccentric throw, can control the size of angle of oscillation.

Crank and rocker mechanism of the present utility model (5) also can be a form as shown in Figure 3, and crank can be made up of a screw rod (14) and the slide block that slides in chute (13), and rocking bar (10) can be affixed with knife bar (2).Can rocking bar (10) be connected with slide block (13) by the connecting rod (11) that two ends are hinges.Screw rod (14) makes slide block (13) be in different eccentric positions, constitutes the crank that can regulate its length.When power source (3) drove slide block (13) rotation, rocking bar (10) shook knife bar (2), by the position of adjusting slider (13), obtains different angle of oscillation amplitudes.

Knife bar of the present utility model (2) head can be a form as shown in Figure 4, and it can have one by that be connected, that blade (1) the is housed cutter head (15) with knife bar (2) of straight end-face key and garden, center post.Because cutter head (15) can be higher with the precision that is connected of knife bar (2),, just guarantee that than being easier to point of a knife is on the axis of knife bar (2) as long as the installation site of blade (1) is correct.When damaging its head when forging a knife, only with changing cutter head (15), it is convenient to change.

Blade of the present utility model (1) can be the clamped cutting bit sheet, and the cutter nest machining accuracy that the clamped cutting bit sheet is installed should improve, should be with the symmetry of knife bar (2) axis less than 0.1mm, and after blade was packed into, tangible gap did not have.The most handy roller bearing that is connected of the knife bar in the utility model (2) and base (4) should note improving rigidity.Power source of the present utility model (3) can be used hydraulic motor, has bigger power and rotating speed adjustable, and its rotating speed generally should be adjusted at about 1.5 times of workpiece velocity of rotation.

Claims (5)

1, shakes chip breaking device and form, it is characterized in that: between knife bar (2) and power source (3), be connected with a crank and rocker mechanism (5) by blade (1), knife bar (2), power source (3) and base (4).

2, the chip breaking device that shakes as claimed in claim 1 is characterized in that: the crank in the crank and rocker mechanism (5) is the adjustable length crank.

3, the chip breaking device that shakes as claimed in claim 2 is characterized in that: the adjustable-length crank is made up of the garden dish (8) and the slide block (9) of an adjustable eccentric distance.

4, the chip breaking device that shakes as claimed in claim 2 is characterized in that: the adjustable-length crank is made up of a screw rod (14) and the slide block (13) that can slide in chute.

5, as claim 1,2, the 3 and 4 described chip breaking devices that shake is characterized in that: have one by that be connected, that blade (1) the is housed cutter head (15) with knife bar (2) of straight end-face key and center Cylinder.

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