SU549199A1 - Device for stamping hollow parts with taps - Google Patents

Description

firewood, pumping tools and high pressure seals makes it unreliable in operation. Filling the billet with liquid and removing air from the billet in the specified device is carried out through channels in axial plungers and punches using two check valves and a time switch. The inclined channel in the axial punch extends close to the outer diameter of the punch in the place where the punch is most loaded during punching. Making small bore holes at large lengths in axial plungers is a difficult operation. Filling the workpiece with liquid should not be fast in order to avoid heating the liquid as it passes through a narrow channel. The presence of two check valves reduces the reliability of the device, especially at high pressures.

The aim of the invention is to improve the performance of the device.

To achieve this goal, it is provided with a slider installed in the guide bars} 1y connected via an intermediate link, such as a rack with gear 1, with the upper half of the die for removing and removing the workpiece from the die cavity.

In order to increase reliability and productivity, channels for supplying the working fluid are made in the lower part of the matrix, and channels for supplying air in the upper part.

FIG. 1 shows a device, a longitudinal section; in fig. 2 is a cross-section .i- / 1 of FIG. one; in fig. 3 - section bb FIG. 2; FIG. 4 - axial punch.

The main components and mechanisms of the device are fixed on the bed /. The plunger-type master cylinder 2 is designed to close the upper top 3 and the lower 5 matrices fixed on the table 4, the last of which is loaded tube stock 6. In the cavity of the plunger 7 of the main cylinder of dimensions; The price of a rolling pin S, fixedly connected to cylinder 2. Upper matrix 3 is fixed on the movable yoke I connected to plunger 7. Upper and lower matrix have cavities corresponding to the dimensions of the workpiece and the formable elbows. The opening of the dies is carried out by lifting cylinders 10 and / D, which, in addition, prevent the rotation of the plunger 7 and, according to O, the misalignment of the dies. Axial cylinders 12 and 13 with the help of plungers 14 and 15 and axial punches 16 and 17 seal the ends of the workpiece and axially settle it during punching. The end parts of the punches 16 ii 17 are tapered (see Fig. 4) with dimensions corresponding to the dimensions holes for the thread in the stamped part. The high pressure fluid in the workpiece is created by a multiplier 18 (see Fig. 1) placed in the plunger M. The axial punch 16 and the plunger 14 have channels connecting the high-pressure cavity of the multiplier with the workpiece. The drive of the master cylinder 2 and the axial cylinders 12 and 13 is carried out from

pump 19 using spools 20 and 21. Filling tank 22 is used when idling. The throttle 23 creates an adjustable pressure drop between the master cylinder.

5 and axial cylinders. The speeds of movement of the plungers 14 and 15 are synchronized by a dividing valve 24 ensuring the same flow rates in the cavity of the axial cylinders 12 and 13. Filling the workpiece with liquid is produced from the pump 25 through the channels in the table 4, the matrices 5 and 5, and the traverse 9. The pump 25 delivers the liquid to the cavity high pressure multiplier through check valve 26 during retraction

5 multipliers. Multiplier 18 npiiEOdits from the pump 27 s. using spools 28 and 29, throttles 30 and a safety valve 31 through a channel in the shank 32, fastened to the plunger 14. From the pump 27 from the spool 28, a retaining cylinder 33 is actuated (Fig. 2), which with the help of the plunger 34 and punch 35 to a formable retraction with an effort, regulating ground reducing valve 36. Zago 5 is delivered to the lower matrix 5 from the magazine 37 in the recess of the rack slide 38, which is driven by the guides 39 from the rail 40 fixed on the cross bar 9, through gears 41, 42 and 43. Ejector 44 impediment There is no jamming of the stamped part in the bottom die. From the upper matrix, the part is removed by the ejector 45 into the pallet 46, the shaft mounted on the slider 38 while the lever 47 is pushed into the center of the lead 2. From the pallet 46, the part is guided through the opening 48 into the container 49 through the hole in the guides 39.

When the spool 20 is turned on to the right position, the liquid from the pump 19 through the spool 20 and the rolling pin 5 enters the cavity of the plunger 7. That one with the cross member 9 and the upper die 3 is quickly lowered, while the cylinder 2 receives liquid from the filling tank 22 through the spool 21. Lever 47 is moving out

5 with stops, and the ejector 45 moves to the upper position. When lowering the plunger 7, the slider 38 is set in motion, exiting the die zone. At the time of closing the top 5 and 5 of them, the notch in the crawler 38 is located under the opening of the store 37, and the workpiece falls into it. When the dies are closed, the spool 21 is turned on, shutting off the flow of fluid from the tank 22 to the cylinder 2, while the last Z5 is fed only from the pump 19 through the zolotpiki 20 p 21. After the spool 21 is turned on, the plungers 14 and 15 of the axial cylinders 12 and 13 from the pump 19 through solstnik 20 and 21, choke 23 and divider 0 1: th valve 24.

From the pump 25 through the channels in the table 4 and the mily matrix 5 into the cavity of the workpiece 6 is supplied liquid. Excess fluid along with air is removed through channels in the upper

5 to matrix 3, traverse 9 and lower matrix 5.

When the spool 28 is turned on, the plunger 34 of the supporting cylinder 33 is moved from the pump 27 to the right position. The supporting punch 35 abuts the workpiece 6 with a force adjustable by a reducing valve 36.

During the course of the plunger 14 and / 5, the axial punches 16 and 17 seal the ends of the workpiece 6. At the same time, filling it with liquid from the pump 25 stops.

After the billet is compressed with axial punches, the spool 29 is turned to the right position, and a multiplier 18 is introduced from the pump 27 through the spools 28 and 29 r. A pulsating pressure / i.e. in the workpiece can be created by means of a safety valve 31, the flow rate through which the pump 27 is more productive. The valve periodically opens when the pressure multiplier on which the valve is set is reached in the manifold and closes after the pressure is released. The frequency of pulsation is controlled by the choke 30.

Under the action of high hydrostatic pressure inside the workpiece and axial compression, a tap is formed into the corresponding cavity of the matrix, to the top of which, in order to avoid rupture, there is a punch 35. In the process of stamping, the wall of the pipe billet thickens, and since the end parts of the axial punches 16 and 17 enter inside the blank, are tapered, then in the process of stamping in the blank, conical holes for thread are formed.

At the end of the punching, the spools are switched to reverse, and the axial plungers 14 and 15, the supporting cylinder 34, the plunger 7 of the main cylinder and the multiplier 18 move to the outgoing end positions. When the multiplier 18 returns to the high pressure cavity, fluid is pumped from pump 25 through check valve 26, which prevents air from entering it.

The stamped part is removed from the bottom of the die by the ejector. When raising the upper die with the part, the rail 40, rotating the gears 41, 42 and 43, moves the slider 38, in the recess of which the workpiece is placed from the magazine 37, to the lower die 5. When the die 3 approaches the extreme upper position, the notch in the slider 38 is above

lower matrix 5, and the workpiece falls into it. At the same time, the finished part is removed from the upper die 3 by the ejector 45 into the pallet 46.

Subsequent lowering of the upper matrix slider 38 out of the die zone. The pallet 4Q, located on the copier of the magazine 37, is rotated around an axis, dropping the part along the slide 48 into the container 49.

The proposed device makes it possible to significantly reduce the laboriousness of the process of manufacturing fittings, to reduce the cost of manufacturing the production by 2-3 times.

The expected economic effect from the introduction of one process is 160 thousand rubles. At present, the proposed device is in production.

Claims (3)

1. A device for punching hollow parts with taps, containing a split matrix on the frame, consisting of upper and lower parts, a closing cylinder, coaxially mounted cylinders for upsetting the billet with punches fixed on their plungers, as well as installed in the line connecting the cylinders for upsetting the billet with the pump and with the closing cylinder, multiplier, characterized in that, in order to increase productivity, it is provided with Nolzui frames connected through an intermediate link, for example, a rack with gear, with the upper part of the die. 2. The device according to claim 1, characterized in that, in order to increase reliability and penetration, in the lower part of the matrix channels for supplying the working fluid are made, and in the upper part - for exhausting air. 3. A device according to claim 1, characterized in that the precipitation punches are provided with specialized XOCs. Sources of information taken into account in the examination: 1. US Patent Ni 3654785, cl. 72-28 1971; 2. Japanese Patent No. 120388 (B 21 from 26/00) DGD 48 - 4142.7; 3. US patent No. 3350905, CL. 72-28, 1968 t srgl 23 2 J7 § ° 01Л one. Jill tpt | J ChigZ 47