DE4029812C1 - Holder for thread cutting die - has main grip with hand grips and inner ring with locking pins - Google Patents

Abstract

The holder for a thread cutting die, consists of a main ring (1) with hand grips and an inner ring (3) which fits int he main ring. Locking pins (8) are mounted in the inner ring which engage with indents in the cylindrical outer face of the die or die holder. The outer faces of the locking pins are bevlled so that the pins are pushed radially inwards when the inner ring with die is mounted in the main ring. The pins are pushed outward, to release the die, when the die is removed from the inner ring. ADVANTAGE - Easy mounting of die in die holder.

Description

The invention relates to a thread Die holder, with one with handles Basic ring, with an intermediate ring that can be used in it limited radially displaceable, in pockets of the base ring inserting and into the jacket-side recesses of a the interchangeable insert or insert retaining bolts and on the Insert side of the base ring for the intermediate ring and that Dies or the insert arranged slide for Definition of the intermediate ring in the base ring.

Such a die holder is made of DE-GM 84 14 777 become known and it is the task of Invention, this die holder in its structure and to further simplify its handling.

This object is achieved by the characterizing Features of claim 1 solved, the still in the design features listed in the subclaims represent advantageous developments of the task solution.

In the die holder known from DE-GM 84 14 777 the retaining bolts are under a spring preload and are also spring-loaded locking bolts  in the locked position of the die held.

Everyone needs to change the die Locking bolt moved against its spring force be so that they release the retaining bolts, which then through their springs are pushed out of the locked position.

There are none in the die holder according to the invention Springs for the retaining bolts and no spring-loaded ones Safety bolt required because after opening the Slider for the replacement of a cutting iron necessary axial displacement of the intermediate ring alone due to the also necessary for the exchange Movability of the cutting iron in its axial Direction over the inclined surfaces of the retaining bolts is caused. So that the intermediate ring with the Cutting dies after opening the slider without any problems Holder to be taken. After that is just as easy Cutting die change possible.

The die holder according to the invention provides one universal holder for holding dies or Adapters and is compared to those from the aforementioned Utility model known die holder from less Assembled parts, smaller and lighter executed and cheaper to manufacture.

Due to the limited, freely movable arrangement of the Retaining bolts and their non-positive and positive Interact for the radial displacement with the Base ring and the die or insert, that is Insertion and removal have been made much easier since only a small pressure due to the positive and positive engagement needs to be exercised when inserting and removing since the retaining bolts then automatically into the respective Radially shift position and both end positions  on the one hand by the base ring and on the other hand by the Die or use can be determined.  

In the drawings, an embodiment of the Invention shown, which in more detail below is explained. It shows

Fig. 1 is a plan view of a die holder with a base ring provided with hand attacked, on the slide are arranged,

Fig. 2 is a longitudinal section through the half of the cutting iron holder according to section line AA in Fig. 1,

Fig. 3 is a plan view of a cutting an iron exchangeable receiving intermediate ring with holding bolts,

Fig. 4 shows a cross section through the intermediate ring by section line BB in Fig. 3,

Fig. 5 is a plan view of an insertable into the intermediate ring insert for receiving a cutting die,

Fig. 6 is a section through the insert of section line CC in Fig. 5,

Fig. 7 is a plan view of a further use,

Fig. 8 shows a cross section through the intermediate ring with retaining pins in the partially inserted state in the base ring,

Fig. 9 shows a variant of Fig. 8.

The die holder for thread dies has a base ring ( 1 ) with handles ( 2 ). An intermediate ring ( 3 ) with radial retaining bolts ( 8 ), which are inserted into pockets ( 4 ) of the base ring ( 1 ), can be inserted into this base ring ( 1 ). The intermediate ring ( 3 ) interchangeably receives a cutting die or an insert (adapter) ( 6 , 7 ) receiving a cutting die, and the retaining bolts ( 6 ) engage in recesses ( 5 ) of the cutting die or insert ( 6 , 7 ) on the casing side. a.

Furthermore, on the insert side of the base ring ( 1 ) for the intermediate ring ( 3 ) and the die or the insert ( 6 , 7 ) slide ( 9 ) are arranged, which serve to fix the intermediate ring ( 3 ) in the base ring ( 1 ).

The base ring ( 1 ) has two opposite lugs ( 10 ) into which the handles ( 2 ) are screwed with threaded bolts ( 11 ).

The base ring (1) takes in a stepped receptacle (12) to the intermediate ring (3), (a 12) is supported on the gradation.

The intermediate ring ( 3 ) also has a stepped receptacle ( 13 ) for a die or an insert ( 6 , 7 ).

The insert ( 6 ) as an adapter also has a stepped receptacle ( 14 ) for inserting a smaller cutting iron.

The insert ( 7 ) is equipped as a disc with a central square holder ( 15 ) for inserting the shaft of a tap.

The intermediate ring ( 3 ) is preferably equipped with three retaining bolts ( 8 ) which are evenly distributed over the circumference and are freely displaceable in the radial direction in the intermediate ring ( 3 ).

Each retaining bolt ( 8 ) is connected with its two longitudinal ends both to the base ring ( 1 ) and to the die or insert ( 6 , 7 ) when inserting or removing the intermediate ring ( 3 ) and the die or insert ( 6 , 7 ) designed to cooperate in a force-locking and / or positive-locking manner under radial bolt displacement.

The outer end of each retaining pin (8) interacts with the base ring (1) upon insertion of the intermediate ring (3) together, wherein the retaining pin (8) is displaced in radial direction inwardly and with its other, inner length end which as a cone (16) is formed, in the recess ( 5 ) of the cutting iron or insert ( 6 , 7 ).

When the cutting iron or the insert ( 6 , 7 ) is removed from the intermediate ring ( 3 ), the cone ( 16 ) of each bolt ( 8 ) interacts with the recess ( 5 ) and the bolt ( 8 ) is then moved radially outwards.

In the inserted position of the intermediate ring ( 3 ) and the cutting iron or insert ( 6 , 7 ) inserted therein, the retaining bolt ( 8 ) with its outer end ( 8 a) is flush with the receptacle ( 12 ) of the base ring and the cone ( 16 ) fits positively into the recess ( 5 ) of the cutting iron or insert ( 6 , 7 ).

In order to achieve an automatic radial displacement of the retaining bolt ( 8 ) inwards when inserting the intermediate ring ( 3 ) into the base ring ( 1 ), it is preferred to have its outer length end ( 8 a) with an oblique and / or curved pressure surface ( 17 ). equip, which cooperates with the edge ( 12 b) of the base ring ( 1 ), cf. Fig. 8.

According to the variant according to FIG. 9, the base ring ( 1 ) in the region of its pockets ( 4 ) can be equipped with an oblique and / or arcuate pressure surface ( 17 ), the retaining bolt ( 8 ) then having the edge of its length end ( 8 a ) acts on this pressure surface ( 17 ) for free displacement.

The free radial displacement is limited by a pin ( 18 ) introduced into the intermediate ring ( 3 ), which engages in a lateral recess ( 19 ) in the retaining bolt ( 8 ), this recess ( 19 ) being arranged in such a way that it follows the Cone ( 16 ) a cylinder section remains on the bolt ( 8 ) and the outer end portion of the bolt ( 8 ) also remains cylindrical.

A guide pin ( 20 ) is formed on each threaded bolt ( 11 ) of the handle ( 2 ), around which the slide ( 9 ) with a web ( 21 ) can move freely.

Each slide ( 9 ) is also mounted on the base ring ( 1 ) to a limited extent on both sides in the radial direction by its web ( 21 ) engaging in a slot ( 22 ) in the base ring ( 1 ).

Furthermore, in the base ring (1) has a detent (23), preferably ball catch is arranged which locks for detecting attitude of the same in the basic ring (1) displaced position of the slide (9) cooperates in the intermediate ring (3) having the same and this, cf. . Fig. 2.

The insertion of the intermediate ring (3) with dies or inserted insert (6, 7) takes place from the feed side of the base ring (1) fro, wherein the retaining pin (8) projecting from the intermediate ring (3) radially outwardly. As soon as the retaining bolts ( 8 ) hit with their pressure surface ( 17 ) or pressure edge ( 12 b) on the edge ( 12 b) or pressure surface ( 17 ) of the base ring ( 1 ), the radial displacement of the retaining bolts ( 8 ) in automatically takes place In the direction of the die or insert ( 6 , 7 ) and the cones ( 16 ) engage in the recesses ( 5 ) in a positive manner.

Then the slide ( 9 ) are pushed towards each other in the radial direction so that they overlap the intermediate ring ( 3 ) and hold it in the base ring ( 1 ).

To remove the intermediate ring ( 3 ) from the die holder, the slides ( 9 ) are moved radially outward so that they release the intermediate ring ( 3 ) and no longer overlap at the edges.

Then a pressure is exerted by hand through the opening ( 12 c) in the base ring ( 1 ) on the die or the insert ( 6 , 7 ) and the intermediate ring ( 3 ) is removed from the receptacle ( 12 ) so that the retaining bolts ( 8 ) exposed. A further pressure on the die or the insert ( 6 , 7 ) automatically pushes the retaining bolts ( 8 ) with their cone ( 16 ) out of the recess ( 5 ) radially outwards so that the die or the insert ( 6 , 7 ) can be removed from the intermediate ring ( 3 ).

It is within the scope of the invention to design such an intermediate ring ( 3 ) with three retaining bolts ( 8 ) as part of a machine holder, the intermediate ring ( 3 ) then being arranged on a clamping shaft for clamping in a lathe or drilling machine.

Claims (6)

1. The thread cutting die holders, displaceable with a provided with handles (2) basic ring (1), an insertable therein intermediate ring (3) with limited radial, is depositor in pockets (4) of the base ring (1) and casing-side recesses (5) a cutting die replaceably inserted into the intermediate ring (3) or insert (6, 7) enclosing the retaining bolt (8) and on the insertion side of the base ring (1) for the intermediate ring (3) and the cutting dies or the insert (6, 7) arranged slide ( 9 ) for fixing the intermediate ring ( 3 ) in the base ring ( 1 ), characterized in that the retaining bolts ( 8 ) with their radially inner and radially outer ends via inclined surfaces ( 16 , 17 ) on the die or insert ( 6 , 7 ) as well as on the base ring ( 1 ), and their displaceability in the radial direction is effected by the exchanging movement of the cutting iron or insert ( 6 , 7 ). 2. Threading die holder according to claim 1, characterized in that the radially outer length end ( 8 a) of each retaining bolt ( 8 ) has an inclined surface ( 17 ) and its inner length end is designed as a cone ( 16 ). 3. Threading die holder according to claim 1 and 2, characterized in that all retaining bolts ( 8 ) in the inserted position of the intermediate ring ( 3 ) with their outer length end ( 8 a) in the pockets ( 4 ) lying flush with the receptacle ( 12 ) complete the base ring ( 1 ) and engage with its cones ( 16 ) in the recesses ( 5 ). 4. Threading die holder according to one of claims 1 to 3, characterized in that the inclined surface designed as a pressure surface ( 17 ) is provided at the outer length end ( 8 a) of each retaining bolt ( 8 ) and when inserting the intermediate ring ( 3 ) with a pressure edge ( 12 b) of the base ring ( 1 ) interacts positively with radial displacement ( Fig. 8). 5. Threading die holder according to one of claims 1 to 3, characterized in that the inclined surface designed as a pressure surface ( 17 ) on the base ring ( 1 ) in the region of its pockets ( 4 ) is provided with the radial displacement of the retaining bolts ( 8 ) the edge of the outer retaining bolt length end ( 8 a) cooperates ( Fig. 9). 6. Threading die holder according to one of claims 1 to 5, characterized in that each retaining bolt ( 8 ) for limiting the radial displaceability with a lateral recess ( 19 ) engages over a pin ( 18 ) inserted in the intermediate ring ( 3 ), this recess ( 19 ) is arranged such that the bolt ( 8 ) retains a cylindrical bolt portion following its cone ( 16 ) and also in the outer longitudinal end region.