DE1752751B2 - A self-tapping thread cutting head that can be placed in a thread cutting stock - Google Patents

Description

3 4

of the adjusting ring 10 is extended downward and forms stepped shaft 35 is through with the bracket 24

run.iingsvorsprunge, which are firmly connected to the side surface 15 of a cross pin 36. Stop pin 32,

Rotation 13 and a fitting surface 11 «he bracket 24 and locking bolt 28 form a spring

geuen. About the common outer jacket 14 of the ste U-shaped unit. As soon as the stop pin 32 Mciiringes IU is thus the cover ring 6 against the 5 touches the end face 33 of the workpiece 22, it will

Beam support 1 centered, when cutting the lengthways on the

Workpiece 22 protruding along the cutting head in the direction9 of the cover ring6 specify: ring segment-shaped approaches 17 into it, which lifted. With it, the bracket 24 and the lift Rivet facing each other and with their end locking bolt 28. Is the locking bolt [laugh the ring-shaped base of the recess 9 io 28 raised so far that its stop surface 30 touch. In the between the ring segment-shaped the vertical surface 21 of the ring segment-shaped approach 17 releases the remaining free cavities of the insert 17 on the adjusting ring 10, the jumps rotation 9 control springs 18 are inserted. With her cutting head on.

one end of these lie on the vertical surface 19. The end position of the raised locking ring segment-shaped projection 17, with its 15 mechanism 24, 28 shows Fi ε. 6th
As can be seen from the drawing, the distance from the other vertical surface 21 of the stop surface 30 leads to an incline 37 of the locking bolt 28 extending radially ^{under approximately 45 r to it verAnsatz 17, the recess 9}

By this control springs 18, which are attached to the pin. This touches the equally inclined flat surface 38

th 20 and on the vertical surface 19 of the 20 on the outer edge of the vertical surface 21 on

Approaches 17 rest on the collar 10, is on the approach 17 of the collar 10. Press with the

Mellnng 10 exerted a rotational force that this adjusting the ball of the hand on the convex front 23 of the bracket

ring is rotated counterclockwise as soon as a locking 24, then the locking bolt 28 to un-

locking mechanism, which is pressed in more detail below, its inclined 37 slider, along «cW

is described is released. Is limited 25 flat 38, thereby rotates the adjusting ring 10

this rotary movement by the fact that the surface 21 and locks it again when the mechanism the

open the Mitt ZO. This rotary movement has reached the position of FIG. 5. Now the system is

of the bell ring 10, the cutting jaws 5 from FIGS. 32, 24, 28 can again be in their working position according to FIG

Working position according to Fig. 2 in the open position So that the elements 32, 24, 28 in their starting position

nacn Im g. 3 are withdrawn and held in position by the workpiece 22 30, the stop pin 32 is

be lifted off. spring loaded. At the end lying at bracket 24

uieses Weikstuck 22 is, for example, as a tube of the longitudinal bore 34, a sleeve 39 sits through

drawn. Of course, a cylindrical pin 40 in the oval eye 27 of the ab-

pieces of solid material machined in the same way cover ring 6 is held. The stop pin 32 _:

^vve ~. ^cn · .. .. ,, 35 whose shaft 35 has a compared to the diameter

Only this opening and subsequent closing area of the head has a smaller diameter

The following device is used for movement: The front penetrates this sleeve 39. In the cavity of the

IS of a radially lying bracket 24 is spherical, longitudinal bore 34 between the sleeve 39 and the

its flat bottom 25 is when the head located at the other end of the bore 34 is

cutting head is in the working position, on which 4 "of the stop pin 32 lies a shaft 35

Flan surface 26 of an elongated oval eye 27 of the closing, on the head of the stop pin we-

Cover 6 on. A cylindrical compression spring 41 is attached to the bracket 24.

dr.scher locking bolt 28 connected to the striker pin 32, as well as the bracket connected to it

one running parallel to the tool-workpiece axis 24 including the locking bolt 28 on the cover

Fenden longitudinal bore 29 of the cover ring 6 is inserted. 45 press ring 6, d. H. this system in employment

The locking bolt 28 has a stop to be held.

flat 30 on. on which the outer edge of the lowering As can be seen from the above description, right Zl of the approach 17 rests. As a result, the device 32, 24, 28 according to the invention enables the spring-loaded adjusting ring 10 to automatically open, close and lock, and with it also the cutting jaws 5 in working hours of the cutting head:
ment (see. Fig. 2 and 5) held. If the locking pin 28 is raised together with the bracket 24 and the cutting position in the running 1. The workpiece toward the end of the l · ig. 6 brought, the control process at the stop pin 32 lifts this done 18 outgoing torque effectively, the bracket 24 and locking bolt 28, Mcllnng is rotated counterclockwise, the 55 stop surface 30 of this bolt gives the Ringücnneidbacken 5 will be Moment segment 17 free of workpiece 22 on adjusting ring 10, lifted off under the tan and pushed into the position of FIG. the cutting jaws 5 are in the position of

This opening movement is initiated by F i g. 3 controlled back. The cutting head opens

a sensor in the form of a stop pin 32, if 60 is automatic.

this on the face 33 of the workpiece 22 on the 2nd bracket and locking bolt have the position

bndc dec work process is running. This is done development of the fig. 6. To close the cutting head again

then, if - as it is expressed in Fig. 1 close, there is no need for any further lever or

Coming - the full-width cutting jaws 5 in the additional unit. The bracket 24 is shaped so

tingntl with the workpiece 22. The stop 65 that the heel of the hand rests on its surface 23

step 32 runs in a parallel to the bore 29 and the bracket up to the rest on the

The longitudinal bore 34 of the cover ring 6 ends with the eye 27 of the cover ring 6 pressed on

slidably mounted. Its opposite to the head something of the position of the fig. 6 into that of FIG

can be brought. This closes the cutting head with the control of the Cutting jaws from the position of FIG. 3 into the working position of FIG. 2 reached. The slope 37 of the locking bolt 28 slides along the flat 38 on the approach 17 of the Adjusting ring 10 and turn it clockwise.

The stop surface 30 comes in front of the locking surface 21 of the ring segment 17 Adjusting ring 10 to lie; the cutting head is locked.

1 sheet of drawings

Claims (1)

Thread cutting jaws after completion of the thread Claims: The cutting process is enabled and simple Way can be put back into working position """ ^A thread cutting stock can be used. This Aufeabe is according to the invention by the self-opening thread cutting head, solved in its 5 that the "locking bolt" by means of a radially adjustable cutting jaw axially / orsprin- over the cover ring protruding, preferably narrowing edges of a bracket formed between a ballier with a, the cover support and a Cover ring rotatably on ring * penetrating axially parallel and engaging with the frontal position, which is integrally connected in the stop pin aligning the side of the workpiece aligning the cutting jaws causing rotation. direction acted upon by spring force and you already know a thread cutting stock by the end of a locking bolt in which it is held in place by means of an on-working position that triggers the cutting jaws, thereby causing a blow that is controlled by the workpiece. The oo? ^{n Z} - ^e ' ^{C h n el} ' ^{that the} locking bolt known design is very expensive and U ^m J " ^{e emeS over the cover ring} (6) presently unwieldy (German patent specification 581 977). gel (24) with a, the cover ring axially parallel, the end of the locking bolt has an Andurcnsetzenden and with the end face (33) of the striking surface, to which a "slope adjoins workpieces (22) aligned stop pin (32) which in the rest position on a Paragraph of the Stellrineinstuckig connected. _{20 total} is applied. This design allows on one 2. Thread cutting stock according to claim 1, a multiple way of putting the mechanics into work thereby marked that the end of the adjustment. locking bolt (28) a stop surface (30) around "the stop pin and bracket in the cutting This is followed by a bevel (37) to hold ment, according to a further feature which, in the rest position, rests against an extension (17) of the invention eii: e on the cover ring support-Mellring (10). _zen de spring provided. Appropriately through i. Thread cutting stock according to claim 2, the stop pin sets a veranda in the cover line, characterized in that a spring (41) supporting _{itself on the core bushing on which the spring is supported. "Cover ring K} 6) is provided / -> ^e n λ o ^e , / stop pin (32) including bracket 30 illustrates the invention, for example, namely (24) and pickling (28) holds in the cutting position. shows 4. Thread cutting stock according to Claim 3, Fig. 1 shows a section through the cutting head characterized in that the stop pin line I-i of Fi g. 2, iial ,! ^me . ^{bushing anchored in the covering} (6), FIG. 2, a plan view of the cutting head (3 J) passes through, on which the spring (41) is supported 35 cutting ^{jaws in the working position, ls} ' Fig. 3 shows a partial plan view after the end Cut of lifted cutting jaws, F i g. 4 shows a section along line IV-IV of FIG. 2, FIG. 5 shows a section along line V-V of FIG. 2 40 with actuators and located in the working position according to FIG ry c γ λ u -rr Fig. 6 also a section along line V-V of uie: The result relates to a thread Fig. 2 with actuators when the cutting edge is lifted Self-opening threaded jaws that can be used with cutting stock according to FIG. 3. descnne.dkopf, _in its radially adjustable cutting head, in its jaws axially projecting control edges of a lower part 2 of the ratchet lever 3, a jaw carrier and a cover ring. In radial guide slots 4, rotatably arranged positions e.g grip, which are mounted in cutting jaws 5. The cover ring 6 closes the opening of the cutting jaws causing the cutting head to the front and is acted upon by spring force through Schrau-Urennchtung and 50 ben 7 with the jaw carrier 1 firmly, but releasably, through the end of a locking bolt in the bound Working position is fixed. _{Since the passages for the} screws 7 in the Abbe cutting head for screw cutting machine cover ring 6 are designed as longitudinal slots 8, ^{3 can be} . ^sc ! ^ ^ beat to provide the locking after loosening the screws7 of the cover ring counter-bolts of the thread cutting head on a fork mounted on 55 above the jaw carrier 1 to a certain degree in the jaw carrier, which are rotated in one sense or the other to the dependency of the distance between thread cutting jaws 5 within a certain BereiherZ, Ä ° h ^{P un} , ^d . ^Sch . ^a . ^ft S. ^este "ert and, if this is the case, if there is an oversize or undersize of the normal given distance, the locking bolt is triggered. zv, Sch ™ Vrt ^U T ⁿ ? ' Tc ^S J ^e _f ^V0 Hu ^{the distance 6o In an} annular recess9 of the cover n chnmmftMh ^P w ^nd _t ^S " ^h ? ^{ft is dependent And ri} " S ^{es 6 is a StelIrin} S ¹⁰ g ^ela g ^{£ rt} · ^The arched shape is not directly controlled by the workpiece. Since the control curve running radially from the inside to the outside nfrht h l ^eSC u ,? ^{n v n} ° ^{"Nominal" d} eS'hneidkluppen ven 11 engage on the adjusting ring 10 in the slots 12 not transferable (German patent specification 413 877). Cutting jaws 5. To free for the curves Ue brhndung has the task of _{creating a self-opening 6 5} space, the jaw carrier 1 has a ring nendcn thread cutting head for a thread groove 13 biuTein '^ l ^ p ^h f. ^{ffen> d} , ^{iC tr} _A ^otZ , ^{simply on} - at ^the transition of the control cam 11 to the outer one The outer jacket 14 is used to precisely determine the trigger point of the ring surface of the adjusting ring 10