SU719770A1 - Thread rolling tool - Google Patents

Description

one ...

The invention relates to the processing of metals by pressure, in particular, to devices for the manufacture of internal threads by plastic deformation.

Known thread rolling head, which is equipped with deforming rollers with a circular thread 1.

The lack of a thread rolling head is insufficient for its performance due to high specific pressures in the zone of contact of the rollers with the supporting elements. „

The closest to the invention in its technical essence and the achieved result is a tool for rolling internal threads, containing thread-rolling royiks placed in a housing; as well as two supporting conical elements that can interact with thread rolling rollers C2.

The disadvantage of this tool is that it cannot roll threads with a large pitch, for example

1.5 mm and higher, due to the occurrence of large forces, which entail breakage of the rollers and excessive wear of the contact surfaces of the roller — the pressure element.

The purpose of the invention is to expand the technological capabilities of the tool.

The goal is achieved by the fact that the thread rolling tool is equipped with a mandrel with a pin mounted in the housing rotatably and a spring connected at one end to the pin and the other with the housing, while in the housing a screw groove is made, the free end of the pin is placed in this groove , and one of the supporting conic elements is rigidly fixed in the body of the Olravka .. -:

FIG. 1 shows schematically the instrument, the initial position; in fig. 2 shows section A-A in FIG. one; in fig. 3 - thread rolling tool when screwing it into the part on the go.

 - f f Thread rolling rollers 1 with ring cutting are placed in housing 2 with - - ШШИШГ Шойй бтнсюдогогзз for the amount of thread lifting and turning - yuty by the angle corresponding to the angle; lifting of the processed carving. In the case along the axis are placed with the possibility., „-. , i ™, „free rotation of the front support element 3 and the mandrel 4, in which the freely rotating rear support element 5 is placed. In the case there is a pin 6, screwed in the mandrel 4 and connected with a spring 7 mounted on the case 5. In the initial position, the spring 7 through the stud 6 and the screw groove of the housing 2 presses the housing to the nut 8. This NUIOZHEJIA corresponds to a certain distance between the supporting elements 3 and 5 and the size of the rollers 1. The regulation) The size of this size is produced 1; by moving the nut 8 along the mandrel 4. When screwing the thread rolling machine into the part in the upstream direction, the rolling rollers 1 at the beginning of the working stroke under the action of the circumferential forces f,. t -., -., -. J,. the rollers are turned together with the body relative to the mandrel 4. Pin 6, Schsch in the screw slot, retracts the body 2 from the nut 8 and stretches the spring 7.) lSHf, TS Sf6HH4e elements are consumed, the carving rollers are supported by radial rolling forces getting closer. The value of ya 18SH1BBgo of the groove, the curvature of the taper of the supports of the elements 5 and 5; conical axles of thread rolling rollers. When IJceifiHHurTH TOM of the bucket of the Y-groove is used, torque is generated from pin 4 through pin 3 and case 2 is transmitted to 719770 thread rollers 1. The first thread rolling process occurs. After the thread rolling rollers come out of the hole in the end of travel, the gun 7 returns to its original position, the roller rolling rollers 1 flow. The rotation of the mandrel 4 and its feeding are being boosted and the second pass, at the reverse of the course of the tool, is already done with an entire paswiepow of the tool. Such an embodiment of the tool POS-OLBT. LOWER the rolling force over the distribution of the deforming allowance for the forward and reverse stroke of the tool and the threads of a larger schag. O op m y l a and struma r e t e n and thread rolling tool comprising razyoschoNyye the housing rezbonakatyyo rOlyki and two support konichobkyh: w "YoyShGy1yeyuschyh zozmozhnost, reacting with the thread rolling rollers on whether h and w w u and so that, with the aim of expanding technological capabilities, it is equipped with a mandrel with a pin mounted in the housing so that it can be rotated and a spring connected with one KOHIIOM with a pin and the other with the housing, while the screw hole is located in the housing, the free end of the pin is accommodated in this groove, and one of oyor 1h conical elements rigidly fixed to the body of the mandrel. Sources of information taken into account during the examination 1. USSR author's certificate NO, cl. In 21 N 3 / O8, 1976. 2. Sultanov, T. A. Ribbon rolling heads M., Mashinostroenie, 1966, p. 114, fig. 54.

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Claims (1)

Thread-rolling tool containing thread rolling rollers located in the housing, as well as two supporting tapered elements that can interact with thread rolling rollers, in that, in order to expand technological capabilities, it is equipped with a mandrel with a pin, installed in the housing with the possibility of rotation and a spring connected at one end with a pin, and the other with the housing, while the housing has a screw groove, the free end of the pin is placed in this groove, and one of the conical supporting elements rigidly fixed in the body of the mandrel.