SU1731366A1 - Screw press for forming by rolling - Google Patents

Abstract

Usage: obtaining products by stamping by running around with regulation of the feed rate of the press ram and tool. The essence of the invention. When the motor is turned on, the additional drive flywheel 25, the housing 20 and the nut 19 and the gear flywheel 29 are accelerated to the set speeds. The cylinder 39 of the clutch is connected to the atmosphere, therefore the drive disk 32 under the action of the springs 36 is retracted from the friction inserts 31. The outer slide 3 is held in the extreme upper position, the rods 15 of the cylinders 16. Under the action of the torque in the thread, the screw 18 is the nut 19, the screw 18 rotates at the same speed with the nut 19. .37 Yu E 23 N | CJ CJ O Oh

Description

Together with the screw 18, the inner slide 5, the drum 46, and other structural elements of the inner slide 5 with the screw 18 rotate. The brake pads 47 from the drum 46 are retracted. The rotational speed of the flywheel 29 is greater than the rotational speed of the additional drive flywheel 25 and is determined by the overall gear ratio when the adjusting disk 28 is rotating. When the punch 43 approaches the workpiece, the brake is released, the pads 47 are retracted from the drum 46 and the compressed air is fed into the cylinder 39. The piston 40 is lowered and includes a clutch. Flywheel 29 is hard coupled.

through the friction insert 31, the driven disc 33, the splined sleeve 34 and the shaft 35 with screw 18. Screw 18 acquires a rotational speed equal to the rotational speed of the flywheel 29, and the nut 19 continues to rotate with the rotational speed of the additional driving flywheel 25, the Internal slider 5 provides an oscillating rolling movement of the die holder 12. The feed of the punch 43 per one revolution of the internal slide 5 can be selected depending on the gear ratio, which is controlled by rotating the adjustment disk 28 from the electric motor. 2 Il.

This invention relates to forging machinery.

The process of stamping by rolling has a number of advantages compared with the traditional technology of die forging: a significant (5–15 times) reduction of the technological effort and loads on the tool, obtaining a high degree of surface cleanliness without the use of lubricants, a high degree of accuracy of products, a reduction in the cost of parts , significant reductions in the overall dimensions of the machines, footprint and mass.

A press is known for producing articles by punching by rolling, comprising a frame, in the guides of which a slider and a hydraulic cylinder of a slider drive are mounted. In the traverse of the press, another slide and an electromechanical drive of this slide are placed with the possibility of swinging movement, made in the form of concentrically mounted eccentric bushings connected with the slide and through worm gears and gears with an electric motor. The slider is installed at an angle to the vertical axis of the press and under the action of the drive makes a complex oscillatory motion, acting through the punch on the workpiece and creating a consistent plastic deformation of the material being processed 1.

A disadvantage of the known construction is the substantially large time of deformation of the billet, which excludes the processing of the heated billet due to its cooling in the process of shaping. It is not possible to increase the speed of deformation, since the force of deformation is created by the hydraulic cylinder and an increase in the speed of deformation leads to a pump drive of the press.

a significant increase in the installed drive power, and in case of a pump-battery drive, it is impossible to ensure the specified parameters of the technological process, since the speed of movement of the working tool with a pump-battery drive depends on the power factor and cannot be adjusted with the required accuracy.

Another disadvantage of the press is the complex design of the drive of the inclined slide, and the worm gears and gears limit the nominal force and power of the press.

The known screw press for forging by rolling, selected as a prototype, contains a frame in which a screw articulated with a thread is mounted for rotational movement.

a nut mounted in a flywheel of a friction clutch with a driven disc connected to a screw; an additional drive flywheel actuator and a slider placed in the bed guides connected to

rods mounted on the frame of hydraulic cylinders and mounted in the slider nut 2.

The press has a simple design, a small tool contact time with the workpiece, a small installation drive power, due to the accumulation of energy in the flywheel, ensuring synchronization of tool movement at the working stroke, with a predetermined ratio

the translational speed of movement of the tool and the frequency of its swings with a high speed of the press and the reliability of the mechanism of synchronization of rotation of the screw and nut.

A disadvantage of the known construction is the inability to adjust the feed rate of the slider and tool, which limits the technological capabilities of the press.

This major disadvantage is eliminated in the proposed press.

The aim of the invention is to expand the technological capabilities of the press - the versatility of the press, increasing its efficiency, ensuring adjustment of the feed rate of the slide and the tool per turn swing depending on the technological process. These features of the press provide improved quality stamped products, reduce the pressure of the press.

The goal is achieved by the fact that a screw press for punching, containing an outer slide mounted in the guide beds with an inner slide that is rotatably mounted therein, connected through a slotted sleeve with a screw, articulated with a nut, mounted in the housing, mounted on bearings in the frame, mounted in the main flywheel, a friction clutch with a driven disc, connected with a screw by an additional spline hub, cylinders mounted on the frame, the rods of which are connected to the outer slider m, located on the outer slide brake inner slide, as well as

same mounted on bearings on

An additional drive flywheel connected to the nut body and the main flywheel by means of an intermediate element made in the form of an adjusting disk with a drive mounted on a bearing on the nut body and connected gears mounted in pairs on an adjusting disk, one of which is connected with the main flywheel, and the other with an additional flywheel and the adjustment disk drive.

A comparative analysis with the prototype shows that the claimed rolling press is different in the presence of new structural elements. Rotation of the screw relative to the nut with a constant gear ratio through internal gearing in the proposed design is transmitted through pairwise interconnected gears that are mounted on bearings on an adjusting disk mounted on a bearing on the nut body, and driven by an electric motor with a given angular speed. - rorsty, providing variation of gear ratio of external gearing. Thus, the claimed screw press for stamping run-in 0

0 5

0

50

5 0 5

It meets the criteria of the invention of novelty.

A comparison of the proposed solution with other technical solutions in this field of technology shows that the distinctive features of the proposed design of the press are not known; therefore, the proposal meets the criterion of significant differences.

Fig, 1 shows the proposed press in section; figure 2 - node I in figure 1.

The press contains a bed 1, in the guides 2 of which an external slide 3 is installed, in which an internal slide 5 with a sleeve 6 is mounted in bearings 4. An assembled cylindrical insert 7 is installed at the end of sleeve 6. A hemisphere 8 is located inside the eccentricity insert with bearings 9 and 10, the carrier 11 is mounted, on which the press holder 12 is mounted, which performs swinging movements in the housing 13. The outer slider 3 is connected by a bracket 14 to the rods 15 of the cylinders 16 mounted on the press frame 1, the inner slider 5 through the slotted a sleeve 17 is connected to a screw 18, which is screwed to a nut 19 connected to a housing 20 mounted on bearings 21, 22 and 23 in a press bed 1. On the base of the press, bearings 24 are fitted with an axle nut 19 and a screw 18 with an additional drive flywheel 25, which through external gear through a system of gears 26 installed in bearings 27 on an adjusting disk 28, is connected with the main flywheel 29 installed in the bearings 30 on the housing 20 of the nut 19 and the associated friction inserts 31 of the controlled clutch and the drive disk 32 with the driven disk 33, which are splined by means of the splined hub 34 and the splined shaft 35 with the screw 18. The master The claim 32 and the driven disk 33 are spring-loaded with springs 36 and 37, and the spline sleeve 34 is installed in the housing 20 of the nut 19 in the bearings 38. Air is supplied to the cylinder 39 with the piston 40 of the coupling through the air-conductive head 41 through the air ducts 42. On the die holder 12, a punch 43 is installed, and a die 45 is placed on the press table in the stamp 44. The inner slide brake is made of any known construction, for example in the form of a drum 46 rigidly connected to the inner slide 5 and the friction pads 47 with any known drives, Stamp holder 12 is connected the lead A mechanism made in the form of a leash 48 with body 13. One end of the leash is connected by a cylindrical hinge through axes 49 and 50 in stud 51 with body 13, and the other end to spherical hinge 52 through points 53 and 54 and body 55 with punch holder. 12.

The press works as follows.

When the electric motor is turned on (not shown), the additional drive flywheel 25, housing 20 and nut 19 and the main flywheel 29 are accelerated to the specified speeds. The cylinder 39 of the coupling is connected to the atmosphere, therefore the drive disk 32 is removed from the friction springs by the action of springs 36 inserts 31. The outer slider 3 is held in an extremely, upper position by the rods 15 cpindot 16. Under the effect of a moment in pe.ii 51 hours, - 19 zint 18 rotates with the same o. th with, with nut 19:

, , -wMi,

rfleV / t. jv. cKupor / Ti / yrg.tseni screw 18 rjJVH 1G. and .; lnital drive flywheel 2b.

Together with the screw 18, the inner slide 5, the drum 46 and other structural elements of the inner slide 5 with the screw 18 rotate at speed WB,

The pads 47 of the brake from the drum 46 retracted. Together with the screw 18, the rotating shaft 35, the slot 34 and the disk 33 with the friction clutch of the VSTZCHK.-AI 31 rotate together. The rotation speed is 9 (W--) more than the rotation speed i to j / v ./ on the flywheel / s (v m |): determined by the gear ratio 3.p. with an extra adjusting disk 28 (Md 0) and a general gear ratio i 0 in with a rotating adjusting disk (L / rd m 0):

L / m2 1zp WM1 with Wp.fl. 0;

WM2 IO.B. WMi with Wp.fl. 0;

 wM2-wp.fl

 ° -B WMi .d.

To accomplish an accelerated downward movement, the brake is applied to the internal slide 5. To this end, the pads 47 brake the drum 46 and the internal slide 5, as well as the screw 18 rigidly connected with it. Under the effect of the torque in the screw connection the screw 18 - nut 19 overcomes the resistance of the cylinders 16, a screw 18 and its associated inner 5 and outer 3 sliders move with a speed

,

where wr wmi;

h - the thread of the screw 18.

At the approach of the punch 43 to the workpiece (not shown in the figures) the brake is released, the pads 47 are retracted from the drum 46 and the compressed air flows into the cylinder 39. The piston 40 lowers and turns on the clutch. The flywheel 29 is rigidly connected through the friction insert 31, the driven disc 33, the splined hub 34 and the shaft 35 with the screw 18. Screw 18 acquires a rotational speed equal to the rotational speed of the flywheel 29 (WB WM2), and the nut continues to rotate with the speed of rotation the flywheel 25 (Wr WMI), as it is rigidly connected to it.

The outer 3 and inner 5 sliders move downward at a speed of

h (i -1) ... v 2 In this case, the internal slider 5, rotation 1 ... to

Cc with a speed of -r-WM1, provides an oscillating running-in movement of the die holder 12 with the same frequency. Feed (move) the punch for

one revolution of the internal slide is

hCl-P

0

five

0

five

0

five

and may be selected depending on the gear ratio, which is regulated by rotation of the adjusting disk 28 from an electric motor (not shown in the figures).

In the course of the deformation, the torque that occurs in the threaded joint

where RD is the force of deformation, brakes the nut 19 and accelerates screw 18. But, as the screw 18 and the nut 19 are interconnected by gearing through the gear system, then the screw 18 - nut 19 - additional drive flywheel 25 closes the moment - the main flywheel 29. Thus, the energetically active moment is only the moment of resistance to the rolling of the workpiece.

At the end of the deformation stroke, the air from the cylinder 39 is released and the clutch is disengaged. Under the action of the force of the cylinders 16, the moving parts are raised upward at a speed

(We-wr),

where Wr, WMi, a WB are determined by the dynamics of the acceleration of the screw 18, the internal slide 5 and the design elements of the press associated with

screw 18 and the inner slide 5 on the course of acceleration up from the cylinder 16.

At the end of the slide stroke upwards, they stop, for example, by overlapping the piston cavities with the atmosphere, while WB Wr.

Claims (1)

Claims Screw punching press for rolling containing an outer slider mounted in the bed guides with an internal slider rotatably mounted therein connected through a slotted sleeve with a screw articulated with a nut mounted in a housing mounted on bearings in the bed mounted in the main flywheel a friction clutch with a driven disc associated with a screw, an additional splined hub mounted on the stani13 51 50 Rig. 2 non-cylinders, the rods of which are connected to the outer slider, an internal slider brake placed on the outer slider, and an additional drive flywheel mounted on bearings on the frame, connected to the nut body and to the main flywheel by means of an intermediate element, characterized in that expansion of technological capabilities by providing adjustment of speed, the feed of the slide and the tool on the swing revolution, the intermediate element is designed as an adjustment disc with a drive installed on the bearing on the nut housing, and interconnected gears mounted in pairs on an adjusting disk, one of which is connected to the main flywheel, and the other to an additional flywheel and drive adjustment disc. 53