RU2429932C1 - Device for contact loading of springs - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: device includes upper and lower inserts and shell for installation of inserts in it and spring between them, puncheon with ball surface contacting with ball surface of upper insert. Lower insert is installed so that it can be rotated relative to the shell axis, and upper insert is installed so that it can be rotated and moved along the shell axis and the axis can be deviated from puncheon axis. Inserts are provided with grooves for 3/4 of the turn which are flat and for 1/4 of the turn which are screw, which have the diameter corresponding to inner diameter of the spring with the depth of not less than by the height of spring turn with lift height of the turn by the height of edge of the spring turn, and shell has inner diameter within diameter of compressed spring to diameter of coiled spring.

EFFECT: providing the possibility of plastic strengthening of springs with ground edges of extreme turns.

2 cl, 1 dwg

Description

The invention relates to the field of manufacture and testing of springs in mechanical engineering, and in particular to devices for increasing the bearing capacity and performance of springs by plastic hardening, and can be applied in other industries manufacturing and using springs - automobile industry, agricultural machinery.

Known devices for contact covering the springs described in the copyright certificates of the USSR No. 198747, 348792, 419660, 643684, US Pat. RU 2393042.

The closest is the device according to US Pat. RU 2393042, comprising an upper and lower liners, a cup for installing the liners in it and between them springs and a punch with a ball surface in contact with the ball surface of the upper liner, while the lower liner is mounted to rotate relative to the axis of the glass, and the upper is rotatable and displacements along the axis of the cup and deviations of the axis from the axis of the punch, characterized in that the liners are made with annular grooves at the ends with a diameter corresponding to the inner diameter of the spring and a depth of not less than the height Single spring and the glass is formed with an inner diameter in the range of the diameter of the compressed spring wound to a diameter of the spring.

The aforementioned device is intended for plastic hardening by contact covering of springs with fully pre-sanded, polished end coils up to the beginning of the working coil. These include cyclic springs, the main requirement of which is to combine the axis of the spring force with the axis of the mating part having a flat contact surface with a coil: engine springs, power springs of hydraulic systems, etc.

However, there are springs with the ends of the extreme turns polished by 3/4 of the diameter of the coil [1] to maintain the strength of the extreme coil of the spring and to combine the axis of the spring force with the axis of the mating part along the plane. These are mainly working with the collisions of the coil of the spring of high-speed machines, for which it is just as important to reduce the number of cases of breaking of the coil of the spring by increasing the height of its end face, as well as the combination of the axis of the spring force with the axis of the mating part along the plane.

The aforementioned device with annular grooves is not suitable for plastic hardening by contacting a spring with polished 3/4 ends of the extreme turns due to the lack of continuous contact of the surface of the annular grooves with the polished flat and unpolished helical parts of the ends of the extreme turns of the spring, which leads to an uneven load distribution the diameter of the spring when covering and bending the axis.

An object of the invention is the development of a device that allows plastic hardening by contact covering the springs with the ends of the extreme turns polished by 3/4 of the diameter of the coil.

The technical result is achieved due to new elements and their new connections for contacting the springs, namely, the device contains a cup for installing the inserts and the test spring between them, a punch with a spherical surface in contact with the spherical surface of the upper liner, the lower liner, and the lower the liner is installed with the possibility of rotation relative to the axis of the glass, and the top with the possibilities of such rotation and movement along the axis of the glass and the possibility of deviation of its axis from the axis of the punch, characterized in that at the ends of the inserts grooves are made for 3/4 turns flat and for 1/4 turns screw with a diameter of the inner diameter of the spring depth not less than the height of the coil of the spring with the height of the coil to the height of the end of the coil of the spring, and the inner diameter of the cup is made size ranging from the diameter of the compressed spring to the diameter of the wound spring. In this case, the grooves in the coil section can be made along the radius of the coil of the spring with a depth of not more than the radius of the coil.

When loads of contact shear are applied (10 ... 300 F ₃ , where F ₃ is the spring force at maximum deformation), the gap between the coils is selected and the coils are compressed along their contact line, as a result of which the spring, changing the curvature of the coil, interacts with the inner diameter glasses and screw grooves at the ends of the inserts. Clamped by screw grooves of the ends of the liners, they are in contact with each other and with the inner diameter of the glass, after which the plastic coils of the spring coils are subjected to axial forces of 10 ... 300 F ₃ . In this case, the load of gouging through the screw surfaces of the liners is evenly distributed on the screw surfaces of the coils in contact with the spring diameter.

The drawing shows a device consisting of a punch 1 and a cup 2, in which the test spring 4, the upper liner 3 and the lower liner 5 are placed. The ends of the compressed spring are contacted 3/4 turns flat and 1/4 turns with screw grooves the ends of the liners 3 and 5, abutting the ends of the turns in them, and the turns are in contact with the inner surface of the glass 2.

The device operates as follows. The device is mounted on a fixed table of the press, and the punch 1 is fixed to the upper movable plate of the press. The test spring 4 is inserted into the cup 2 in such a way that the ends of the spring are in contact with the screw grooves of the ends of the liners 3 and 5. Then, the punch 1 is lowered by the movement of the press, causing the spring 4 to compress, increasing its outer diameter until all of its turns are come in continuous contact with the inner surface of the cup 2. Due to the contact of the ends of the spring with the screw grooves of the ends of the liners and the contact of the coil of the spring with the inner surface of the cup, the compressed spring will take the correct geometric shape. Due to the presence of a spherical surface on the punch 1 and the upper liner 3, the press force is evenly distributed over the diameter of the compressed spring. After the required exposure to a load of 10 ... 300 F ₃ , the punch is lifted, the spring is removed from the device.

An advantage of the claimed device with respect to the known ones lies in the possibility of plastic hardening by contact gouging of springs with 3/4 ends of the extreme turns polished due to the fact that the load of gouging through the grooves is flat by 3/4 of a turn and screw by 1/4 of a turn of the surfaces of the liners is evenly distributed on the contact surfaces the diameter of the spring surface of the extreme turns.

Information sources

1. GOST 13764-86. Cylindrical helical springs of compression and tension from round steel. M .: Gosstandart, 1986.

2. Auto USSR 198747, class 42k, 25, M. cl. G01m. Device for contact covering of springs. / Kryukov B.N. - No. 813750 / 25-28; declared 01/10/1963; publ. 08.24.1967. Bull. No. 14 of 1967 - 2 p.

3. Auto USSR 348792, M. cl. F16F 1/00. Device for contact covering of springs. / Tebenko Yu.M. No. 1318771 / 25-28; claimed 04/07/69;

publ. 08/23/72. Bull. Number 25. - 2 p.

4. Auto USSR 419660, IPC F16F 1/00. Device for contact covering of springs. / Tebenko Yu.M. - No. 1857065/25 - 27; declared 12/15/72;

publ. 03/15/74. Bull. No. 10. - 3 p.

5. Auto USSR 634684, M. cl. F16F 1/04. Device for contact covering of springs. / Kryukov B.N., Vishnev M.I., Vendrov I.Ya. No. 2443609 / 25-28; declared 01/19/1977; publ. 01/25/1979. Bull. Number 3. -2 sec

6. Pat.RU 2393042 Cl, IPC B21F 35/00, F16F 1/02. Device for contact covering of springs. / Tebenko Yu.M., Zemlyanushnova N.Yu., Zemlyanushnov N.A. -2009119496 / 02; declared 05/22/2009; publ. 06/27/2010. Bull. Number 18. -4 p.

Claims (2)

1. A device for contact covering the springs, comprising an upper and lower liner, a cup for mounting the liners and springs between them, and a punch with a spherical surface in contact with the ball surface of the upper liner, while the lower liner is mounted to rotate relative to the axis of the glass, and the top - with the possibility of rotation and movement along the axis of the glass and deviation of the axis from the axis of the punch, characterized in that the inserts are made with 3/4 turn grooves flat and 1/4 turn screw diameter, respectively uyuschim inner spring diameter, the depth of not less than the height of the coil spring with the lifting height to the height of the coil end of the coil spring, and the glass is formed with an inner diameter in the range of the diameter of the compressed spring wound to a diameter of the spring. 2. The device according to claim 1, characterized in that in the cross section the grooves are made along the radius of the coil of the spring with a depth of not more than the radius of the coil.