SU940906A1 - Apparatus for calibrating ring articles - Google Patents

Description

The invention relates to the processing of metals by pressure, more precisely, to devices for straightening and calibrating ring articles, and can be used in the metallurgical, engineering and other industries.

A stamp for calibrating ring parts is known, comprising a plate, a mandrel mounted on it in the form of sliding sectors with radial channels in which pneumatic hammers are placed, an annular matrix mounted radially with the mandrel with radial channels and additional pneumatic hammers and a punch in contact with the sliding sectors 1.

The design of the chip allows simultaneously with the radial stretching of the processed bell piece to produce local surface high-speed deformation by tapping the product from the inner and outer sides. Such treatment improves the plastic properties of the material of the workpiece, creates favorable conditions for calibration and straightening of difficult-to-deform metals.

The disadvantages of the known device include the low calibration quality of the ring parts and the low productivity of the process.

These drawbacks are explained by the fact that the strikes of the pneumatic hammers of the hammer from both the inner and outer sides of the product are made at the same points of its surfaces, therefore, the deformation of the walls of the part occurs unevenly, which in turn distorts its geometrical form. To preserve the uniformity of processing, it is necessary to reinstall

10 details in a new position relative to the hammer beaters, which takes considerable time and, consequently, reduces the performance of the calibration process.

The aim of the invention is to improve the quality of calibration and process performance.

This goal is achieved due to the fact that in a known device for calibrating ring products containing

20 a plate, a mandrel mounted on it in the form of sliding sectors with radial channels, in which pneumatic hammers are placed, an annular matrix with radial channels mounted concentrically with the mandrel and supplemented with pneumatic hammers and a punch in contact with the sliding sectors, the annular matrix is supplied with a relative rotation drive longitudinal axis

30 products, made in the form of executive body and interacting with him gear, mounted on the matrix.

The drawing shows a cross-section of a device for calibrating ring parts.

 The device contains a mandrel in the form of wedge sectors 1 installed on the plate 2 and radially moved apart with a conical punch 3. In the sectors radial channels are made with pneumatic hammers 4 mounted in them, whose working surfaces can contact the inner surface of the annular calibrated part fixed on the sectors .

Fixing the part against axial movement is carried out by shoulder clamps 5 and 6 located on the sectors.

On the plate 2 concentric to the sectors on the balls in the annular guides freely mounted movable matrix 7 in the form of a composite ring, the bottom of which is rigidly connected to the top, is made in the form of a gear wheel 8, the tooth of which is in constant engagement with the gear 9 of the gearbox 10 electrically or pneumatic actuators. In the mattress 7, there are radial channels in which pneumo-mills 11 are mounted, similar to hammers 4. Working surfaces of hammers 11 can contact with the outer surface of the component being calibrated. In sectors 1 and matrix 7 there is a system of channels for supplying IK to hammers 4 and 11 of compressed air.

To supply compressed air to the hammers I, an annular cavity 12 is formed in the wheel 8, in communication with the channel system, insulated from the atmosphere by a fixed composite ring 13 to which the air distribution device 14 is connected to the control lever. The air distributing device is connected to the channels of the sectors 1 by an air supply hose system. Pneumatic hammers 4 and 11 are set relative to each other in a shakhmatny order. The device is installed on the table of a hydraulic press.

The device works as follows: braz. The calibrated part 15 is placed on the wedge sectors 1. The part is secured against axial movement by shoulders-stops 5 and 6. Depending on predefined calibration modes (punch pressure 3, frequency and impact energy of pneumatic hammers, matrix 7 rotation speed) the position of the control lever of the air-distributing device 14 and the gearbox lever 10. Turn on the drive of the punch 3. At the entrance

downward, the punch with the end part extends the sectors 1. At the same time, the part is stretched and is in a tense state, and the matrix 7 with a certain gap encompasses the item to be calibrated 15. In the air supply channels of sectors 1 and the matrix 7 through the air distribution device 14, the annular cavity 1 2 and the flexible hoses supply compressed air, which is supplied to the pneumatic hammers 11 and 4. The rotary actuator of the matrix 7 is activated. The pneumatic hammers tap the part. During the rotation of the matrix 7, the strikes of the booms of the pneumatic hammers 11, and hence local plastic deformations, occur at various points along the entire perimeter of the part, which accelerates the release of internal stresses and provides a higher quality calibration.

After the calibration is completed, the supply of compressed air to the pneumatic hammer is stopped, the rotational drive of the annular matrix 7 is turned off, the punch 3 is returned to its original position (Top position, part 15 is removed from sectors 1, which are returned to the initial position by the action of springs.

The proposed technical solution allows to increase productivity by accelerating the processing of products from various materials, including hard-to-deformed materials, as well as to improve the quality of dressing and calibration of ring parts by ensuring the uniformity of their surface deformation.

Claims (1)

1. USSR author's certificate No. 443699, cl. B 21 D 3/10, 1973 (prototype).