SU703259A2 - Holder of disk knife to tube-cutting machine tools - Google Patents

Description

one

The invention relates to the field of mechanical engineering, in particular, to the construction-fastening of cutting tools, such as circular knives; used for cutting steel, especially pipes in pipe cutting machines, volatile and stagnonnyh.

According to the main author. St. No. 237546 is a known knife-blade holder for pipe cutting machines, designed as a housing with a shaft located therein for fastening the circular knife and the reciprocating axial movement mechanism located in the hollow shaft II.

However, in a known disk-knife holder, the presence of an axial reciprocating movement performed by the knife in the cutting process only in one direction from a predetermined initial position complicates the operation of the disk knife in the cutting process, and. In addition, it complicates the assembly of the cutting head, since there are usually 3-4 knives in the cutting head, and the likelihood of each of the subsequent knives in the furrow already cut by the previous knife depends on the accuracy of the head assembly, i.e. accuracy of installation of knives in the plane.

In addition, the assembly and disassembly of the holder with the change of the disc knife is relatively laborious, since the holder must be completely disassembled; the sub-bearings are removed from the shaft and from the housing, the axial reciprocating mechanism is completely disassembled, the flange with the cuff is dismantled.

In order to increase the durability of the knife in the proposed holder, the reciprocating axial movement mechanism is made in the form of spring-loaded prisms, nuts with holes screwed into torps. shaft, covers, balls, spaced between prisms and covers and interacting with the walls of the holes of the nuts. 3. In order to improve the mounting conditions, the holder is provided with a yoke mounted on a shaft, made with a transverse groove carrying a circular knife and consisting of a sleeve and a split ring, one part of the ring being rigidly connected to the sleeve, and the other part being placed in the transverse groove of the shaft . FIG. 1 shows the proposed - holder; in fig. 2 is a section A-A in FIG. one; in fig. 3 — node 1 in FIG. 1. The holder includes a housing 1 in which the needle bearings 2, 3 have a shaft 4 that carries the holder 5 with a disk knife 6. In the cavity of the shaft 4 there is a mechanism for axiallyOcfynaTeVlbHoro movement, made in the form of balls 7, prisms 8, springs 9 acting on the prism 8, the balls 7 on the shaft 4 by means of fastening elements, for example nuts 10, 11 with holes 1 2, perceiving the non-tension of the spring I. For fixing the shaft 4 in the floor POL11en two l3 lids having protrusions on the inner surface 1 4 in contact with balls 7 protruding from tversti 12 (Figure 2). .: - -Mechanism ostupatelnogo-axial reciprocating movement of the shaft 4 is made so that its schariki 7 protrude. beyond the limit of shaft 4 by the value of S, and its size is equal to a constant, not L. The distance between 14. the flaps 13 are also equal to the value of L, in the eS5 ftiE fafe, which is the oceiBoro B mechanism of anti-roll movements and, consequently, the shaft 4c with a knife 6za.- fixed in the idle state in a certain average position relative to. projections 14.; .Oboyma made vvide sleeve 15 and the split ring 16 (Fig. 3). One part of the collar 16 is rigidly connected to the bushing 15, and the other is placed in the transverse-groove 17, made in the shaft 4. The chassis of the rings 16 are interconnected by screws 18, the Knife 6 is mounted on the bushing diameter of the sleeve 15; Coy, 19 / - --- - The disk of the knife blade works as follows. When a pipe is cut, i.e. when applying the circular knife 6 and inserting it into - the workpiece being cut off, the knife 6 is influenced by the lateral components of the feed as it is inserted into the body of the workpiece in the axial direction either left or right by an amount less than or equal to S depending on the accuracy Setting the knives in the cutting plane, from the axial thrust of the knives, as well as from the location of the mechanism for clamping the cut piece. At the same time, the corresponding ball 7 will be installed, acting through the prism 8 in contact with it on the spring 9, compressing it. At the end of the cut, the disk knife 6 ceases to perceive the force of the feed under the action of the spring 9, acting through the prism 8, the ball 7 and the nut, either 10 or 11 on the shaft 4, returns to its original middle position. The disassembly of the holder is carried out as follows. The cover 13 is removed, the screws 18 are loosened so that a part of the ring 16 is removed from the groove 17 of the shaft 4, and the latter, together with the axial reciprocating mechanism, is taken out of the sleeves 2, 3, releasing the clip 5 with the circular knife 6. The knife 6 is replaced and assembly of the toolholder in reverse order. Formula of the Invention 1. The holding of a circular knife to the pipe-cutting statps according to ed. St. No. 237546, which, in order to increase knife resistance, the reciprocating axial movement mechanism is designed as spring-loaded prisms, nuts with holes, screwed into the ends of the shaft, covers and balls placed between prisms and covers and interacting with the walls of the holes of the nuts. 2. A support according to claim 2, characterized in that, in order to improve the installation conditions, it is provided with a yoke mounted on a shaft, made with a transverse groove, carrying a circular knife and consisting of a sleeve and a separating ring, and one part of the ring rigidly connected with the sleeve, and the other is placed in the transverse shaft. Sources of information taken into account in the examination 1. USSR author's certificate N 237546, cl. B 23 T 35/00, 1966 (prototype).

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