SU1291260A1 - Arrangement for end reeling of axially symmetric articles - Google Patents

Abstract

The invention relates to equipment for face rolling and improves the quality of the rolled products. The tool of the device is made in the form of a roll with a conical end working surface, and the body with the mandrel and the die is made with means to prevent the working surface of the roll from sliding on the workpiece. In addition, the device is provided with a replaceable mandrel tip and a compensator for moving the mandrel. In the work roll, there is a conical recess under the tip of the mandrel, and both of these elements are made with the dimensions necessary to accommodate this tip in the recess of the roll. In the process of rolling a hollow billet, the lack of sliding of the working surface of the roll along the billet eliminates sticking of the metal to the roll and tearing out of the metal particles from the surface of the billet. 3 3. p. F-ly, 4 ill.

Description

The invention relates to rolling equipment manufacturing equipment, namely, devices for face rolling of articles such as rings or sleeves with shoulders.

The purpose of the invention is to improve the quality of the surface of the products by eliminating the sliding of the working surface of the roll on the workpiece during the rolling process.

.1 shows a device for face rolling of axisymmetric products, side view of phi; .2 - position of the roll at the time of deformation - ring blank, the tip of the mandrel rests on the working part of the roll I in FIG. 3 - the same, for the case when the end of the mandrel enters the recess in the working part of the roll, FIG. A is the same when rolling from rod; Forging blanks of details like step shafts.

A device for face rolling of axisymmetric products contains a moving head mounted in guides 1 and aligned with a linear displacement 2 drive, 3 with an idle roller 4 and a fixed head 5 in which a hollow spindle 8 equipped with a replaceable matrix 7 is mounted in bearings 6. Matrix 7 with a cover 9 attached to the spindle 8 with screws 10. Between the cap 9 and the tappin 8 there are compensating pads 11 installed.

7placed sleeve 12 and installed in the mandrel 13, made in the form of a tubular element. Spindle

8 is reduced to a gear 14 fixed in it with a key 15, the latter is installed in a groove 16 formed in spindle 8 and interacts with its other end with the sleeve 12 through a groove 17 formed on its outer cylindrical surface.

At the end of the mandrel 13 protruding from the spindle 8, a groove 18 is made, a stop 19 is installed in the cotter for fixed fit. In order to enable the latter to interact with the spindle 8 and the sleeve 12, the groove 17 is made through section 20 and the stop 19 is placed inside it. the sleeves 12 are placed the glasses 21 and 22, between which an elastic element (spring) 23 is mounted, a spring-loaded stop 19 of the mandrel 13 to the end of the spins

8. On the protruding and p1G1Ind.d. 8 end of the sleeve 12 a sleeve 24 is installed, and a spherical thrust bearing 25 and a radial bearing 26 are placed in it. A sleeve 27 is attached to the sleeve 24 with a thread on which a nut 28 with a lock nut 29 is attached, inside which has a ring 30, a washer 31 with a spherical recess and a pusher 32 of spherical shape, driven by a pusher, made in the form of a power cylinder 33.

The pusher 32 has a thread on which the stroke adjuster 34 of the sleeve 12 is screwed. On the inner surface of the mandrel 13 there is also a thread, and an interchangeable tip 35, made in the form of a tubular element, is screwed into it. Between the tip 35 and the body of the mandrel 13 is installed a compensator 36, made in the form of a ring. Similar replacement tip 37

screwed on the end of the sleeve 12.

Roller 4 has a conic working part 38 with an obtuse angle about at the apex and is installed in the movable head 3 so that its axis

39 tilted at an angle to the total

the axis 40 of the matrix 7, the sleeve 12 and the mandrel 13, and in contact with the rolling process with the end of the workpiece forming 41 working part 38 is located perpendicular to the specified axis 40.

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In the working part 38, a conical recess 42 is made, the axis of which coincides with the axis 39 of the roll, the apex is directed in the opposite direction relative to the top of the cone of the working part 38, and the angle y at the top of the recess 42 is equal to (180-aO). Due to this, 43 The angle of the working part 38 is located perpendicularly forming the surface 41 of the working portion 38. The angle -j- and the angle Other elements of the geometric shape of valks1 can be chosen so that in the process of rolling the workpiece the tubular element 35 of the mandrel 13 abuts the working portion 38 of shaft-ka g 4 or enters into a recess 42.Pri it to prevent contact of the roll with the end of the mandrel tip geometrical shape of the roll elements have to be

selected in accordance with the ratios:

. oL Dj D. sin -,

/ V, n t H 7 tg ots-D,

, - H ,,

where D. is the outer diameter of the tubular mandrel element i D, is the diameter of the base of the conical recess in the working part of the roll;

DJ is the inner diameter of the tubular element of the mandrel; H, is the displacement of the free end of the tubular element relative to the matrix in the initial position; H is the minimum allowable distance between the roll and the matrix Hj — the depth of the conical depth. sloth in the working surface of the roll; oi - the angle at the top of the working

surface roll. The device works as follows.

The actuator 2 is turned on, which tells the head 3 to move forward in the direction of the die 7, and a gear drive 14 (not shown) which transmits rotation through the key 15 to the spindle 8 and the sleeve 12. From the latter, the rotation is transmitted through the stop 19 installed in the groove 18 frame 13.

If the diameter D of the conical recess 42 in the working section 38 of the roll 4 is less than the product of the internal diameter D, the bale 44 on the sine half of the angle is about at the apex of the cone of the working section 38, as the head 3 approaches the matrix 7, the roll roller 4 abuts the conical part 38 tip 35 and, overcoming the force of the spring 23, pushes the mandrel 13 inside the sleeve 12 (figure 2). In this case, the stop 19 moves in the groove 17 in its through section 20 along the axis 40, and the mandrel 13 continues to rotate, together with the spindle 8 and the sleeve 12, and due to the frictional forces created by the spring 23, transmits rotation to the idle roll 4. Preparation 44 mouth

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In the matrix 7, with a certain gap in relation to its inner surface and the outer surface of the mandrel 13, it slips between them and therefore rotates unevenly and at a slower speed. At the moment when the plane of the end face of the tip 35 pushed into the sleeve 12 of the guide 13 and coincides with the plane of the end face of the workpiece 44, the conical part 38 of the roll 4 presses the workpiece 44 to the end face of the sleeve 37 of the sleeve 12, which through the bearing 25, sleeve 24, body 27 and the washer 31 rests on the pusher 32 and then the force closes on the stroke controller 34 resting against the stationary case of the cylinder 33, which prevents the axial displacement of the workpiece 44, therefore, under the action of the roll 4, the workpiece 44 is deformed and wedged between the cylindrical surfaces of the matrix 7 and tip 35 and begins to rotate with them at the same time, and at the end of the workpiece; and 44 a shoulder is formed. In the process of deformation of the workpiece 44, the mandrel 13 continues to move along axis 40 along with roller 4, which leads to smoothing the inner surface of workpiece 44 with tip 35. At the same time, due to the friction forces of the twisted workpiece 44 relative to the matrix 7 and trimmer 13 does not occur.

After the completion of rolling the collar, the head 3 moves back, the rotational drive of the gear 14 is turned off, and the ram 33 connects to the pressure line of the pump unit and moves the pusher 32 along the axis 40 by an amount determined by the position of the bushing 12.

The pusher 32 acts on the washer 31, from which the force through the housing 27, the sleeve 24, the bearing 25 is transferred to the sleeve 12, and the ring 30 and the washer 31 having the ability to move in the housing 27 perpendicular to the axis 40, compensate for the misalignment of the pusher 32 and the sleeve 12 Lastly, by its tip 37 it communicates the force to the end face of the workpiece 44 and pushes it out of the matrix 7. Under the action of the force of the sleeve 12, the surfaces of the matrix 7 and the workpiece 44 become wedged. At the same time, the outer cylindrical surface of the tip 35 and the inner surface

51

the blanks 44 remain wedged, and the key 15 and the stop 19, which guide the movement of the bushings 12 and the mandrel 13, prevent them from turning relative to each other and relative to the matrix 7. The blank 44 and the mandrel 13 move together from the matrix 7 until the stop 19 contacts the end face spindle 8. A spring 23 at this time helps the mandrel 13 to return to its original position. The mandrel 13 stops, and the sleeve 12 with its tip 37 continues to move the workpiece 44 along the axis 40. The surfaces of the tip 35 of the mandrel 13 and the workpiece 44 are wedged. The sleeve 12 continues up until the workpiece 44 is removed from the tip 35. After this, the power cylinder 33 returns the sleeve 12 to its original position and the cycle of operation of the device is repeated

If the diameter D of the conical recess 42 in the working part 38 of the roll 4 is greater than the product of the inner diameter D, the workpiece 44 is at the blue half of the angle oi at the apex of the cone of the working part 38, during the deformation of the workpiece 44 the tip 35 of the mandrel 13 enters the recess 42 (FIG. 3) In the process of deformation of the workpiece 44, the mandrel 13 remains stationary all the time and retracts into the sleeve 12 only in the event of improper installation or inaccurate manufacture of the roll roll 4. In this case, the presence of the elastic element 23 prevents damage device due to the relative skew of the tool 4 and the workpiece 44.

By virtue of the proposed size relationships, the tip 35 of the tip 35 is not in contact with the working part 38 of the roll 4 or with the bottom of the recess 42,

The proposed roll 4 with a conical recess 42 on the working part 38 can be used in other known devices for face rolling of parts such as stepped shafts 45 of bar stock, as shown in FIG. 4. The process of manufacturing these parts is similar to that described above and differs only in the absence in the matrix 7 of a tip 35f which can be removed from

yes by screwing it from the mandrel body 13.

The proposed device makes it possible to eliminate the sliding of the working surface of the roll along the billet in the process of rolling, in order to ensure the surface quality of the rolled products.

(ABOUT

Claims (4)

1. A device for face rolling axially symmetric products, containing a movable head with a rolling a tool and a stationary head in which a hollow spindle fitted with a die is mounted, a power cylinder driven ejector, a sleeve in the die interacting with the ejector, a mandrel installed in the sleeve in such a way that its end protrudes from the die and the elastic element placed between the sleeve and a mandrel, characterized in that, in order to increase the quality of the surface of the products by eliminating the working surface of the roll on the workpiece rolling, it is provided with a stop fixed on the mandrel, a guide element fixed in the spindle, a sleeve placed on the sleeve, a thrust bearing mounted between the sleeve and the sleeve, a case fixed on the sleeve and a washer with a spherical recess and a counter spherical element placed between the case and the ejector, with This sleeve is made with a length exceeding the length of the mandrel, the mandrel has a length greater than the length of the spindle, the sleeve has a through longitudinal groove in which the stop of the mandrel is placed with the ability to interact with the spindle face and the groove for accommodating the guide element and the rolling tool in the form of a roll with a conical face work surface having an obtuse angle at the top. . 2 "The device according to claim 1, characterized in that the mandrel is provided with a replaceable tip, made in the form of a tubular element, and a ring-shaped compensator mounted between the tip and the body of the mandrel. 7129126 3. The device according to claim 1, from the fact that, in order to increase the efficiency of the face rolling process of ring blanks, in the working part of the roll there is a conical recess, the axis of which coincides with the axis of the roll, the apex is directed in the opposite direction relative to the top of the cone working surface, and the angle with (, at the top - - l t 10 recess equals 180 4. The device 100 PP. 1-3, which is based on the fact that the roll and the tubular element of the mandrel are made according to the relations: D, D, . oi. sin 2-j /. H (-H2  - arctg sGTGv; ten f5 20 Нз Н, - Н,, where D is the outer diameter of the tubular element of the mandrel DJ is the diameter of the base of the conical KOG.O. D. is the inner diameter of the tubular element of the mandrel; H is the amount of displacement of the free end of the tubular element relative to the matrix in the initial position; Hj is the minimum allowable distance between the roll and the die; Hj is the depth of the conical recess in the working surface of the roll roll; about the angle at the top of the working surface of the roll.  / lILj. ff 2225 26 G2 13 SJ7 7 X 3S FIG. 7 39 55  13 2 Editor I. Gorna Compiled by Y. Markov Tehred I.Popovich Proofreader r, Reshetnik Order 77/12 Circulation 583 Subscription VNIIGSh of the USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d, 4/5 Production and printing company, Uzhgorod, st. Project, 4 F (GM