CN2813162Y

CN2813162Y - Full automatic turning machine

Info

Publication number: CN2813162Y
Application number: CN 200520012646
Authority: CN
Inventors: 华科明
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-22
Filing date: 2005-06-22
Publication date: 2006-09-06
Anticipated expiration: 2015-06-22

Abstract

The utility model relates to a full automatic lathe. The utility model comprises a tool carriage, a six-position circular cutting disk, a position changing device, a positioning device and an automatic feeding mechanism, wherein the tool carriage arranged on a guide rail and connected with a power drive device; the six-position circular cutting disk which can be simultaneously clamped with more than five kinds of cutters is arranged on the tool carriage through a rotating shaft; the position changing device can makes the circular cutting disk rotate for one sixth of a circle; the positioning device which can fix the circular cutting disk correspondingly to the tool carriage once the circular cutting disk rotates for one sixth of a circle is arranged below the tool carriage; the automatic feeding mechanism rotating together with the circular cutting disk is arranged on the tool carriage and corresponds to a feed opening of a vibrating tray arranged above the automatic feeding mechanism, wherein a clamping body used for clamping material and parts in the mechanism is connected in a clamping hole of the circular cutting disk; an automatic clamping mechanism cooperated with the automatic feeding mechanism is arranged on a headstock. The utility model realizes the functions of automatic feed, automatic clamp and automatic switchover of six positions of the circular cutting disk, realizes full-automatic control of the processing to multiposition workpieces and improves production efficiency and product quality.

Description

A kind of full-automatic lathe

Technical field

The utility model relates to a kind of full-automatic lathe, refers in particular to a kind of full-automatic lathe that can process the multistation workpiece automatically.

Background technology

Present known tail stock generally once can only be installed a kind of cutlery or top or drill chuck head or drill bit or reamer ....Therefore process the workpiece of multistation, need multiple cutlery just can finish, so just need to change back and forth the required cutlery that is installed, therefore not only labour intensity is big, production efficiency is low, and cannot say for sure to demonstrate,prove the quality of product.And in Chinese patent or application, disclose the introduction that six station rotary jigs are arranged, as application number is that 011209356 disclosed a kind of " hexagonal turret clamp for lathe tail-stock " and the patent No. are 87200249 disclosed a kind of " multifunction high-precision six station rotary jigs ", these two kinds of clamp structures six kinds of cutleries that can both be installed simultaneously need the be installed trouble of required cutlery of transposing back and forth when mainly having overcome processing multistation workpiece.But also such six stations rotary jig is not realized the introduction of the technology of transposition automatically and location in the prior art.

Though some introductions about self-feeding and clamping device are arranged in addition in the prior art, the self-feeding and the automatic clamping device that use in conjunction with six station rotary jigs also do not have.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of at above-mentioned prior art present situation and integrate self-feeding, clamp and replace the automatically full-automatic lathe of function of six station circular cutting disks automatically.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: this full-automatic lathe, comprise and be installed in the planker that links to each other with actuating unit on the guide rail, one can be installed simultaneously, and six station circular cutting disks of cutlery are installed on the planker by rotating shaft more than five kinds, one displacement device and that can make this circular cutting disk do the rotation of sixth circumference can be arranged on the below of planker to the fixing positioner of the relative planker of the every revolution sixth of this cutterhead circumference, one can be arranged on the automatic feed mechanism that circular cutting disk rotates on the cutterhead, and the corresponding vibrating disk feed opening that is positioned at its top, the cramping body that wherein is used for the clamping materials and parts in this mechanism is connected one of cutterhead and is installed in the hole, and an automatic clamping mechanism that matches with this automatic feed mechanism is arranged on the headstock.

Described displacement device comprises that one is positioned at planker below and the co-axially fixed ratchet of circular cutting disk, be evenly distributed with on the outer edge surface of ratchet six with circular cutting disk on six corresponding ratchets in the hole that is installed, ratchet one end that matches with this ratchet leans against on the ratchet, and the other end links to each other with a drive unit; Described positioner comprises a shift fork, a fastening screw and an adapting device that is used to make the shift fork action by this shift fork drive plug, wherein fastening screw is inserted in the pin hole of planker, be provided with six equally distributed locating holes with the pin hole of this planker is corresponding in the cutterhead bottom, latch can be inserted in the locating hole of corresponding station under the shift fork effect, shift fork is located on the shift fork seat that fixes bottom planker, and lower support has spring.

Described automatic feed mechanism comprises the conveying pipeline of an oral area over against the vibrating disk feed opening, one end of conveying pipeline is fixed on the top of six station circular cutting disks by a support, the other end is connected on the cramping body, and communicate with discharging opening on the cramping body, the rear portion of cramping body is connected one on the cutterhead and is installed in the hole and elastic top is held spring, one be electrically connected with control circuit be contained in close conveying pipeline on the support near switch.

Described automatic clamping device comprises cylinder, the pull bar that links to each other with cylinder piston rod, be fixed on collet and in the lathe spindle front aperture and be located at base of the carrier head on the spindle flange, be combined with the porose swivel nut in a middle part on the base of the carrier head, one adapter sleeve that can drive this swivel nut rotation is enclosed within on the swivel nut and with described pull bar and links to each other, be provided with a fixing backing plate in the swivel nut, be embedded with a circle steel ball between this backing plate and the chuck that can rotate to it, described chuck be placed on the main shaft can be vertically before and after slippage and can clamp or unclamp described collet, one be electrically connected with control circuit be located at the discharging opening place of close feed mechanism near switch.

Described drive unit comprises that a pivoted arm and can collide and make the pin of its rotation with this pivoted arm, the bearing pin that wherein said pivoted arm and is fixed on planker bottom is rotationally connected and by a backstay location that fixes with planker, the reset torsion spring of usefulness of pivoted arm is housed on the bearing pin, described ratchet is connected with pivoted arm, and be connected with extension spring between the two, described pin is fixed on the fixed mount that fixes with the lathe guide rail bracket.

The described adapting device that is used to shift fork is moved comprises a roller, and roller is contained on the dwang, and dwang is rotatably connected on the fixed mount that fixes with planker, and the supported underneath of dwang has a push rod, and push rod is fixed on the described fixed mount; And the shift fork that matches with this roller has the afterbody that forms after the invagination, the inside and outside surface of afterbody is the inclined plane, and the bottom surface smooth transition of outer surface and shift fork, and the bottom surface, rear section of shift fork is an arcuation inclined-plane, is the minimum point on this inclined-plane with afterbody outer surface transition position wherein.

Also be provided with a holding pad on the described cramping body, holding pad is by in the groove that a trunnion is located at the discharging opening of clamp body is communicated with, and is connected with a spring.

Described collet is evenly equipped with open slot vertically, and wherein the rear portion of chuck is the tubulose that matches with the main shaft endoporus, and the middle part is horn-like and matches with main shaft outer end awl mouth, and the front portion is that the awl mouth at taper dop and chuck middle part matches.

Described adapter sleeve is one to have the hoop formula adapter sleeve that shrinks breach, and a short handle and a long handle are arranged on the breach of adapter sleeve, is connected with the connector that shrinks this breach between two handles, and the long handle of described adapter sleeve is placed in deflection back and forth on the montant of pull bar.

Compared with prior art, advantage of the present utility model is compared with prior art, the utility model has been realized the self-feeding of lathe, clamping reaches the function of six stations of conversion circular cutting disk automatically automatically, processing to the multistation workpiece realizes full automatic control, has improved production efficiency and product quality greatly.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment.

Fig. 2 is the schematic diagram of reflection automatic transposer of circular cutting disk and automatic feed mechanism structure.

Fig. 3 is the A-A cutaway view of Fig. 2.

Fig. 4 is the B-B cutaway view of Fig. 2.

Fig. 5 is the schematic diagram of reflection automatic clamping device structure.

Fig. 6 is the C-C cutaway view of Fig. 5.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

As shown in Figure 1, the utility model mainly is to be made of the automatic transposer 10 of six station circular cutting disks, automatic feed mechanism 20 and automatic clamping device 30 three parts, wherein:

The structure of the automatic transposer 10 of six station circular cutting disks is with reference to Fig. 1-Fig. 3, it includes one or six station circular cutting disks 50, one can drive circular cutting disk make displacement device 60 and that the sixth circumference rotates can be to the fixing positioner 70 of the relative planker of the every revolution sixth of this cutterhead circumference, wherein: circular cutting disk 50 is installed on the planker 9 by rotating shaft 19, its cutlery more than five kinds that can be installed simultaneously, wherein be installed and install feeding cramping body 23 in the feed mechanism 20 in the hole 21 one, fixed cover 36 and screw rod 38 etc. are with feeding tube 28, pressing plate 25 grades constitute feed mechanism 20 of the present utility model (as shown in Figure 2).Planker 9 and edge cam 40 transmission devices by driven by motor are in transmission connection, and drive the motion forward or backward of lower edge guide rail do by this device.

Displacement device 60 includes a ratchet 1, a ratchet 2, a pivoted arm 3 and a pin 4, and wherein ratchet 1 is fixed with circular cutting disk is coaxial below being positioned at planker, and it rotates through rotating shaft 19 drive cutterheads 50 synchronously by the effect of ratchet 2.Be evenly distributed with on the outer edge surface of ratchet 1 six with circular cutting disk on the corresponding ratchet 101 in six holes that are installed, ratchet 101 of ratchet 2 every promotions like this, ratchet 1 just rotates the sixth circumference, corresponding cutterhead 50 is with regard to station of conversion.Ratchet 2 matches with ratchet 1, and the one end leans against on the ratchet 1, and the other end links to each other with pivoted arm 3.Pivoted arm 3 is rotatably connected on the bearing pin that fixes with planker bottom, and the reset torsion spring of usefulness of pivoted arm is housed on the bearing pin.And, also be connected with an extension spring 41 between pivoted arm 3 and the ratchet 2 for ratchet 2 is leaned against on the outer edge surface of ratchet 1 all the time.A positioning rod 11 is positioned at pivoted arm 3 rear sides, fixes with planker, and pivoted arm 3 leans against on this backstay 11.Pin 4 is the screw rod that a head has cylindrical bar portion, is connected in also to pass through a nut check on the fixed mount 5, and fixed mount 5 is fixed on the lathe guide rail bracket.When planker 9 moved backward, pivoted arm 3 can be collided with the head of this pin 4.

Positioner 70 includes a shift fork 12, a location latch 17 and a roller 8, wherein fastening screw 17 is inserted in the pin hole of planker, be provided with six equally distributed locating holes 18 with the pin hole of this planker is corresponding in the cutterhead bottom, latch 17 can be inserted in the locating hole 18 of corresponding station under shift fork 12 effects.The roughly interposition of shift fork 12 is equipped with a pivot hole, and a shift fork seat 13 that is fixed in the planker bottom is provided with a pivot 14, and shift fork 12 is hubbed on the pivot 14, can rotate around the axis, and shift fork seat 13 can be to the shift fork rotary spacing.Forked head 121 forks of shift fork 12 are between two flanges 171 of latch afterbody, to drive latch 17 actions.In that a fixed bar 15 that is fixed on the planker bottom is being arranged between latch 17 and the pivot 14, be arranged with a spring 16 on the bar, spring 16 is bearing in the bottom of shift fork 12.Shift fork 12 also has the afterbody 123 that forms after the invagination, the inside and outside surface of afterbody is the inclined plane, and the bottom surface smooth transition of outer surface and shift fork, and the bottom surface, rear section 122 of shift fork is an arcuation inclined-plane, is the minimum point on this inclined-plane with afterbody outer surface transition position wherein.Inside and outside inclined plane by the shift fork afterbody and arcuation bottom surface cooperate with roller, under the drive of planker, finish the action that shift fork lifts or falls after rise.Roller 8 is contained on the end of a dwang 7, and the other end of dwang 7 is connected on the fixed mount 5 that fixes with planker, and is rotatable.Be supported with the push rod 6 of a spacing usefulness below the dwang 7, and for easy to assembly, push rod 6 adopt one directly can with the screw rod of screw bolt on the fixed mount, be connected with locking nut on the screw rod.

The concrete course of work is as follows: when planker 9 moves backward, contact with roller 8 by shift fork 12 earlier, and shift fork 12 along with planker 9 continue retreat, the outer incline surface of its afterbody 123 upwards lifts the afterbody of shift fork against roller 8 slippages gradually, shift fork drive fastening screw 17 moves downward thus, make latch 17 leave the locating hole 18 of cutterhead bottom, remove the location between cutterhead 50 and the planker 9; And at this moment along with edge cam 40 be rotated further with planker 9 continue retreat, pivoted arm 3 can be collided with the pin 4 that is fixed on the fixed mount 5, and rotates, and drive ratchet 2 thus to promote ratchets 1 and rotate, and cutterhead 50 also rotates synchronously with ratchet 1; And in the rotation process of this cutterhead 50, fastening screw 17 is before this gradually away from cutterhead locating hole 18, to the solstics, move closer to cutterhead locating hole 18 again, promptly continue against roller 8 slippages on the outer incline of shift fork surface, and fastening screw 17 from cutterhead locating hole 18 farthest during to the transition position minimum point, served as minimum point by the arcuation inclined-plane 122 of shift fork against roller 8 slippages, this moment, the afterbody 123 of shift fork fell after rise gradually, and fastening screw 17 moves upward, and moves closer to cutterhead locating hole 18; When edge cam 40 moves to minimum point, planker 9 retreats at last, and this moment, ratchet 1 just turned over a ratchet, and promptly cutterhead 50 turns over the sixth circumference, finish the conversion of a station, this moment, roller 8 also left the shift fork bottom surface, disengaged, and fell into the shift fork inboard, and shift fork 12 is not owing to there be holding of roller 8, the head of shift fork upwards lifts under the effect of spring force, and fastening screw 17 is inserted in the locating hole 18 of cutterhead, finishes the location; Edge cam 40 is rotated further to the most just by minimum point, planker 9 travels forward, but because this moment, roller 8 also was in shift fork 12 inboards, therefore when planker 9 moves to a certain position, the inner surface of shift fork afterbody can be collided with this roller, but because the inner surface of shift fork afterbody is an inclined plane, therefore along with the advancing of planker, roller can scroll up along this inclined plane, drives dwang 7 and upwards rotates, after leaving shift fork 12, be swung down to again with push rod 6 and collide, when planker 9 travels forward simultaneously, because pivoted arm 3 no longer is subjected to the resistance of pin 4, thereby under the effect of torsion spring power, reset, lean against again on the backstay 11.

Automatic feed mechanism 20 is as Fig. 1, Fig. 2, shown in Figure 4, and as shown in Figure 1, mainly by conveying pipeline 28, constitute near switch 34, cramping body 23, spring 22 and support etc., wherein for the ease of assembling with regulate, support adopts a similar elevating platform structure.It mainly comprises three columns 35 that equidistantly are fixed on the six station circular cutting disks 50, is connected with respectively on the column on a screw rod 33, three screw rods to connect one Shape connecting plate 32 has an installing hole at the middle part of connecting plate 32, is used for installing conveying pipeline 28.Conveying pipeline 28 is a corrugated flexible hose, and one of flexible pipe is inserted in the connector 31, is fixed on by connector 31 on the installing hole of connecting plate 32.Wherein this connector 31 is a thread connection with the installing hole of connecting plate 32, is connected with a locking nut on the connector 31.Be installed in conveying pipeline 28 its oral areas 281 on the connecting plate over against the feed opening 291 of vibrating disk 29 that is positioned at its top, owing to be not connected between vibrating disk and conveying pipeline, the oral area 281 of the conveying pipeline 28 that rotates with cutterhead 50 can keep concentric with the feed opening 291 of vibrating disk like this.Be electrically connected with control circuit near switch 34, be contained on the support near conveying pipeline.

Cramping body 23 is connected one of six station circular cutting disks and is installed on the hole 21, is provided with an adapter sleeve 36 in the hole 21 that is installed of cutterhead, and sliding and insert in the adapter sleeve 36 in the rear portion of cramping body 23, and with its joining screw rod 38 it is connected by one with adapter sleeve 36.Wherein be provided with the through hole that can pass for screw rod 38 at the rear portion of adapter sleeve 36, through hole and screw rod are and are slidingly matched, and are connected with a nut 37 on the screw rod.Cramping body 23 elasticity are held outside spring 22 be enclosed within on the screw rod 38, its two withstands on respectively on the inwall of adapter sleeve and cramping body.This cramping body 23 is owing to the effect of this spring 22, and when it was collided or clashes into, spring 22 is compression automatically, and cramping body 23 can be bounced back in adapter sleeve 36, plays the effect of buffering.

And in order to make materials and parts when discharging opening 231 is gone out, keep level, on cramping body 23, also be provided with a holding pad 25, this holding pad 25 is located in the groove that is communicated with the discharging opening 231 of cramping body by a trunnion 24, holding pad 25 has extended a bar portion, bar portion stretches out outside the groove, and a spring 26 1 ends link to each other with bar portion, and the other end links to each other with fixed bar 27 that cramping body fixes with one.

The structure of automatic clamping device 30 such as Fig. 5, shown in Figure 6, it mainly is made of assemblings such as cylinder 42, pull bar, adapter sleeve 46, swivel nut 47, chuck 48 and collets 49, wherein: cylinder 42 is fixed on the headstock of lathe, be electrically connected with lathe control system by lead, the instruction of being sent by control system realizes pumping to cylinder piston rod 43.One be electrically connected with control circuit be contained on the pole that fixes with guide rail bracket, near switch 39 near the discharging opening of feed mechanism.

Pull bar links to each other with cylinder piston rod 43, it comprises the montant 45 of the vertical state of a cross bar 44 and a place of place's level, wherein cross bar 44 is fixed on the piston rod 43, and montant 45 skies are enclosed within on the cross bar 44, and by shoulder block on the montant and the nut location that is connected on the montant.

Adapter sleeve 46 is enclosed within on the swivel nut 47, is a hoop formula adapter sleeve, and it has a collapsible breach, and indentation, there has between two shanks different in size, 461,462, two handles and is connected with bolt 51, with collapsible described breach, makes it to clamp swivel nut.Wherein long handle 461 skies are enclosed within on the montant 45, and by two spheric washers location, make it under the effect of pull bar, can be up and down deflection one angle back and forth, the swivel nut 47 of close-fitting rotates to drive with it.

Base of the carrier head 53 and spindle flange 52 one are processed with square thread on the base of the carrier head 53, match with swivel nut 47.

Swivel nut 47 screws on base of the carrier head 53, and the middle part of swivel nut 47 is porose, is used for assembling chuck 48.Swivel nut 47 inwalls are lined with a backing plate that fixes with it 54, and a circle semi-circular recesses is arranged on the end face of backing plate 54 rear sides, are used for setting-in steel ball 55.

Collet 49 is contained in main shaft 56 stomidiums, this chuck is evenly equipped with three open slots vertically, and wherein the rear portion of chuck is the tubulose that matches with the main shaft endoporus, and it is horn-like that the middle part is, match with main shaft outer end awl mouth, anterior awl mouth for taper dop and chuck middle part matches.

Chuck 48 is enclosed within on the main shaft 56, but axial slip, and there is a bell at the end face of chuck 48 middle part, matches with the taper dop of collet 49.Chuck 48 is provided with the corresponding semi-circular recesses of semi-circular recesses on a circle and the backing plate, is embedded with a circle steel ball 55 between two semi-circular recesses, constitutes the structure of similar axial thrust bearing.

Like this when piston rod 43 makes progress moving linearly, promoting adapter sleeve 46 by pull bar upward deflects, because swivel nut 47 and adapter sleeve 46 be close-fitting mutually, therefore swivel nut 47 rotates with adapter sleeve 46, swivel nut 47 relative base of the carrier head 53 screw in, and the promotion by backing plate 54, steel ball 55 makes chuck 48 inside slippages thus, and chuck 48 is in inside sliding process, clamp the dop of collet 49 gradually, reach collet 49 and clamp and remain the purpose of material processed; Otherwise, when the downward moving linearly of piston rod 43, promote adapter sleeve 46 by pull bar and deflect down, 47 relative base of the carrier head 53 of swivel nut outwards screw out, and the steel ball 55 of locking is unclamped, and when steel ball unclamps, chuck 48 is outwards slippage also, and dop is unclamped, and is in feed state.Like this because the operation that moves in circles of piston rod reaches the function that the utility model clamps automatically, unclamps automatically.

Claims

1, a kind of full-automatic lathe, comprise and be installed in the planker (9) that links to each other with actuating unit on the guide rail, it is characterized in that: one can be installed simultaneously, and six station circular cutting disks (50) of cutlery are installed on the planker (9) by rotating shaft (19) more than five kinds, one displacement device (60) and that can make this circular cutting disk do the rotation of sixth circumference can be arranged on the below of planker to the fixing positioner (70) of the relative planker of the every revolution sixth of this cutterhead circumference, one can be arranged on the cutterhead with the automatic feed mechanism (20) that circular cutting disk rotates, and the corresponding vibrating disk feed opening that is positioned at its top, the cramping body (23) that wherein is used for the clamping materials and parts in this mechanism is connected one of cutterhead and is installed in the hole (21), and an automatic clamping mechanism (30) that matches with this automatic feed mechanism (20) is arranged on the headstock.

2, full-automatic lathe as claimed in claim 1, it is characterized in that: described displacement device (60) comprises that one is positioned at planker below and the co-axially fixed ratchet of circular cutting disk (1), be evenly distributed with on the outer edge surface of ratchet six with circular cutting disk on six corresponding ratchets in the hole that is installed (101), ratchet (2) one ends that match with this ratchet lean against on the ratchet, and the other end links to each other with a drive unit; Described positioner (70) comprises a shift fork (12), a fastening screw (17) and an adapting device that is used to make the shift fork action by this shift fork drive plug, wherein fastening screw (17) is inserted in the pin hole of planker, be provided with six equally distributed locating holes (18) with the pin hole of this planker is corresponding in the cutterhead bottom, latch can be inserted in the locating hole of corresponding station under the shift fork effect, shift fork is located on the shift fork seat (13) that fixes bottom planker, and lower support has spring (16).

3, full-automatic lathe as claimed in claim 1, it is characterized in that: described automatic feed mechanism (20) comprises the conveying pipeline (28) of an oral area over against vibrating disk feed opening (291), one end of conveying pipeline (28) is fixed on the top of six station circular cutting disks (50) by a support, the other end is connected on the cramping body (23), and communicate with discharging opening (231) on the cramping body, the rear portion of cramping body is connected one on the cutterhead and is installed in the hole and elastic top is held spring (22), one be electrically connected with control circuit be contained in close conveying pipeline on the support near switch (34).

4, full-automatic lathe as claimed in claim 3, it is characterized in that: described automatic clamping device (30) comprises cylinder (42), the pull bar that links to each other with cylinder piston rod (43), be fixed on collet (49) and in the lathe spindle front aperture and be located at base of the carrier head (53) on the spindle flange, be combined with the porose swivel nut in a middle part (47) on the base of the carrier head (53), one adapter sleeve (46) that can drive this swivel nut rotation is enclosed within on the swivel nut and with described pull bar and links to each other, be provided with a fixing backing plate (54) in the swivel nut (47), be embedded with a circle steel ball (55) between this backing plate (54) and the chuck that can rotate to it (48), described chuck (48) be placed on the main shaft (56) can be vertically before and after slippage and can clamp or unclamp described collet (49), one be electrically connected with control circuit be located at the discharging opening place of close feed mechanism near switch (39).

5, full-automatic lathe as claimed in claim 2, it is characterized in that: described drive unit comprises that a pivoted arm (3) and can collide and make the pin (4) of its rotation with this pivoted arm, the bearing pin that wherein said pivoted arm (3) and is fixed on planker bottom is rotationally connected and by backstay (a 11) location that fixes with planker, the reset torsion spring of usefulness of pivoted arm is housed on the bearing pin, described ratchet (2) is connected with pivoted arm (3), and be connected with extension spring (41) between the two, described pin (4) is fixed on the fixed mount (5) that fixes with the lathe guide rail bracket.

6, full-automatic lathe as claimed in claim 2, it is characterized in that: the described adapting device that is used to shift fork is moved comprises a roller (8), roller (8) is contained on the dwang (7), dwang (7) is rotatably connected on the fixed mount (5) that fixes with planker, the supported underneath of dwang (7) has a push rod (6), and push rod is fixed on the described fixed mount (5); And the shift fork (12) that matches with this roller has the afterbody (123) that forms after the invagination, the inside and outside surface of afterbody is the inclined plane, and the bottom surface smooth transition of outer surface and shift fork, and the bottom surface, rear section (122) of shift fork is an arcuation inclined-plane, is the minimum point on this inclined-plane with afterbody outer surface transition position wherein.

7, full-automatic lathe as claimed in claim 3, it is characterized in that: also be provided with a holding pad (25) on the described cramping body (23), holding pad (25) is by in the groove that a trunnion (24) is located at the discharging opening of clamp body is communicated with, and is connected with a spring (26).

8, full-automatic lathe as claimed in claim 4, it is characterized in that: described collet (49) is evenly equipped with open slot vertically, wherein the rear portion of chuck is the tubulose that matches with the main shaft endoporus, the middle part is horn-like and matches with main shaft outer end awl mouth, and anterior awl mouth for taper dop and chuck middle part matches.

9, full-automatic lathe as claimed in claim 4, it is characterized in that: described adapter sleeve (46) is one to have the hoop formula adapter sleeve that shrinks breach, one short handle (462) and a long handle (461) are arranged on the breach of adapter sleeve, be connected with the connector that shrinks this breach between two handles, the long handle of described adapter sleeve (461) is placed in deflection back and forth on the montant (45) of pull bar.