RU1790463C - Apparatus for manufacturing axial-symmetry hollow parts with stepped configuration - Google Patents

Abstract

Usage: metal forming, in particular the manufacture of axisymmetric hollow parts with a jumper, a hollow process and a flange in the middle part of the process on a multi-position cold stamping machine with integral dies. SUMMARY OF THE INVENTION The invention relates to the processing of metals by pressure and can be used to produce axisymmetric hollow parts with a jumper, a hollow process and a flange in the middle part of the process on a multi-position integral die-forming machine. A device for producing axisymmetric hollow stepped parts on a multi-point cold stamping device is known which comprises a matrix holder fixed to the bed. In the ferrule from the side opposite the punch, three grooves evenly spaced around the circumference are made. The through grooves respectively arranged by it are made in the matrix, in which the two-arm levers are pivotally fixed. The first shoulder of each arm is mounted with the possibility of longitudinal movement in the corresponding groove of the cage. The outer surface of the second shoulder is made conical with the possibility of interaction with the conical surface of the cage. An emphasis is made on the inner surface of the second arm of the lever for the outer surface of the hollow process of the part. In the bed along the axis of the matrix from the ejector side, a rod is rigidly fixed on which a spring-loaded ejector sleeve is located. Thrust rods rigidly fixed to the punch holder are installed with the possibility of interaction with the end face of the matrix. Height of conical surface. the clips are less than (or equal to) the working stroke of the matrix. 5 ill. an automatic machine with integral matrices containing a cutting mechanism fixed to the bed, a transfer mechanism, a matrix unit with matrix units and corresponding punches installed in punches mounted on a slider. The known device does not allow the manufacture by stamping in integral matrixes of axisymmetric sublims With vi. che o 4 About CA) CA

Description

parts with a jumper, a hollow process, and a flange in the middle part of the process.

The purpose of the invention is to reduce metal consumption, improve product quality and reduce the complexity of manufacturing parts with a flange in the middle part.

In Fig, 1 schematically shows the proposed device; in FIG. 2 is a view A in FIG. 1; in FIG. 3 is a section BB in FIG. 2: in FIG. - section bb in FIG. 2; Fig. 5 is a technological process for manufacturing parts.

A device for manufacturing axisymmetric hollow stepped parts on a multi-position integral die cold stamping machine comprises a matrix unit 1 rigidly fixed in a glass 2 of a cold-stamping multi-position automatic machine. In the bores of the matrix block, a detachable sleeve 3 with wiring 4, a matrix unit 5 for alignment, after cutting the ends of the workpiece and forming a chamfer, a matrix unit 6 for backward extrusion of the cavity of the workpiece and direct extrusion of the process of the workpiece are fixed, matrix unit 7 for direct extrusion of the cavity of the hollow process, a matrix unit 8 for piercing the hole in the web of the workpiece and a matrix unit for forming the flange in the middle part of the hollow process.

The structure of the device also includes a cutting sleeve-knife 9 with a spring-loaded pusher 10. located in the stock -11

a cutting mechanism, an abutment 12, fixed in the bed 2, limiting the length of the workpiece being cut, a punch 13, fixed in a slider 14 of the machine for aligning the ends of the workpiece, a punch 15, mounted in a punch holder 16 for reverse extrusion of the cavity of the workpiece, a punch 17, mounted in the punch holder 18 for direct extrusion of the hollow process and marking the recess in the jumper for firmware, a hollow punch 19 fixed in the punch holder 20 for piercing the hole in the jumper, punch 21, fixed in the punch holder 22 for oobrazovani flanges in the middle of a hollow bone. ,

- The matrix assembly for shaping the flange in the middle part of the hollow process contains a clip 23 fixed in the frame 2 and installed inside it with

the possibility of longitudinal movement along the inner surface of the cage of the matrix 24. The matrix 24 is under the action of a spring 25. The spring-loaded stroke h of the matrix is limited by a collar 26. To form the flange on the hollow process of the article, a cavity 27 is made in the matrix to form a flange, the configuration of which corresponds to the configuration of the flange products. Along with the working surface of the matrix, a spring-loaded ejection sleeve 28 is installed along its axis, which through the intermediate part 29 interacts with the rods 30 located in the spacer 31, which is rigidly fixed through the intermediate part 32 in

the matrix unit 1. The rods 30 interact with the ejector 33 mechanism vy-. pushing from matrices. The yoke 23 on the spring side 25 for springing the matrix 24 has three grooves 34 with an end wall 3.5 evenly spaced around the circumference. The inner surface of the cage 23 is a carbon surface made in the form of cylindrical 36 and conical 37 sections that are interconnected. In this case, the conical section is spread out, from the side of the end of the holder facing the punch 21. on the lateral surface of the matrix 24 there are made through grooves located

respectively, the grooves 34 of the holder 23. The length hi of the conical portion of the inner surface 37 is equal to (or less) the stroke h of the matrix 24 (hi h).

In the slots 34 of the cage 23, three two-arm levers 39 are charm-mounted on the axles 38. The axles 38 are rigidly fixed in the matrix. 24. One shoulder 40 of the lever 38 is made with the possibility of longitudinal movement in the groove 34 and interact with the end wall

35. The outer surface 41 of the other shoulder 39 is made with a supporting surface in the form of part of a conical surface with the possibility of interaction with the surface 37 of the casing 23. The inner surface 42 of the lever 39 is a stop for the outer surface of the hollow process. The details and has the shape of a cylindrical shape. In the position of the levers 39, corresponding to the contact of the outer surface 41

with a cylindrical portion 36 of the inner surface of the cage 23, the inner surfaces 42 of the three levers 39 form a cylindrical cavity coaxial with the matrix 26, the diameter of which is equal to the diameter of the hollow process of the part, and the width bi is 0.3-0.5 mm less than the distance b from the flange to adjoining to it a step of a detail.

On the technological transition of forming, the flange in the middle part of the hollow

The process of the part on the punch holder 22 is rigidly mounted parallel to the punch 21 with two stop rods 43, which are able to act on the spring-loaded matrix 24. Moreover, the length I exceeds the length And the punch 21 at least by the thickness 2 of the part jumper.

In addition, the spacer 31 is provided with a shaft 44 rigidly fixed therein, which is slidably mounted inside the ejector sleeve 28 and the process cavity of the stamped part.

The device is installed on a multi-position cold stamping machine. The initial bar for stamping is supplied to the machine. At this time, the slider 14 with the punches mounted on it is in the extreme rear initial position, and the cutting sleeve-knife 9 with the pusher 10 are located at the cutting position coaxially with the cutting sleeve 3 (the device in Fig. 1 shown at the end position of the stamping process).

The bar, passing through the wiring 4 and the cutting sleeve-knife 9, moves the spring-loaded pusher 10 until it contacts the stop 12, which limits the length of the cut workpiece. Then, in the automatic-cutting mode, the slide 14c moves with the punches forward to the matrix block 1 and the rod 11c moves with the sleeve-knife 9 to the first stamping position, where the first stamping technological transition takes place. When the slider moves forward, the punch 13, acting on the pusher 10, pushes the cut workpiece from the knife sleeve 9 into the die 5. With the further slider move in the die 5 through the pusher 10 and the ejector placed in it, the ends of the workpiece are aligned and a bevel is formed on it.

With the reverse stroke of the slider 14, the rod 11 of the cutting mechanism returns simultaneously with the cutting sleeve-knife 9 to its original position. Then the workpiece is pushed out of the matrix 5 into the clamps of the transfer mechanism (not shown), which transfer the workpiece to the second position, where the second stamping process is performed. At this position, during the next stroke of the slider 14 forward, the punch 15 pushes the workpiece from the pliers of the transfer mechanism into the matrix of the matrix unit 6. After this, the pliers open, releasing the workpiece, and the transfer mechanism returns to its original position. With the further progress of the slider forward, the punch 15, acting on the end face of the workpiece, pushes it through the die, directly squeezing the process of the workpiece, until it stops in the stationary at that time ejector of the ejection mechanism from the dies. Then, with the further course of the slider 15. there is a reverse extrusion of the cavity of the workpiece.

After punching is completed, the slide 14 begins to reverse, the punch 15 leaves the billet cavity, after which the billet is pushed out of the die into the next 5 pliers of the transfer mechanism, which then transfer the billet to the third position of the machine, where the third punching process is carried out. At this position during the slide 14

10 forward, the punch 17 pushes the workpiece from the pliers of the transfer mechanism to the matrix of the matrix assembly 7. After this, the pliers open to release the workpiece, and the transfer mechanism returns to its original 15 initial position.,

With the further progress of the slider forward, the punch 17, acting on the jumper of the workpiece, push it into the matrix on the gap installed in its cavity

0 fixed rod. In this case, a direct extrusion of the cavity of the hollow process occurs with simultaneous marking of a recess for piercing the hole in the jumper. With the reverse stroke of the slider 14 punch

5 17 leaves the cavity of the workpiece, and then

the ejector sleeve, acting on the end of the hollow process, pushes the workpiece

from the matrix, removing it from the still. rod and push into the pliers of the mechanism

0 carry.

Then, the pliers of the transfer mechanism transfer the workpiece to the fourth position, where the fourth stamping process takes place. During the course of the slider 14

5 forward, the hollow punch 19, having entered the cavity of the workpiece and acting on the jumper, pushes it into the spring-loaded matrix of the matrix unit 8 until the workpiece stops in a stationary piercing punch, rigidly fixed in the matrix unit. In this case, the hole is pierced in the jumper, the waste is pushed through the hollow punch 19 and is removed through the holes in the punch holder 20.

5 With the reverse stroke of the slider 14 punch

19 comes out of the cavity of the workpiece, and then

ejector sleeve, removing the workpiece from

piercing punch, removes it from the matrix, pushing it into the pliers of the mechanism

0 carry. During the next cycle of the machine, the pliers transfer the workpiece to the last fifth position, where the fifth technological transition of stamping - forming the flange into

5 of the middle part of the hollow process.

At the next stroke of the slider 14 forward, the punch 21, entering the cavity of the workpiece part and acting on the jumper of the workpiece, pushes it into the matrix 24. Pliers races (break and go from this position to the previous one, With the further course of the slide forward two rods 43, I act on the end face of the matrix 24, move it along the yoke 23, compressing the spring 25. During the movement of the matrix 24, the levers 39, sliding along the surfaces 41 along the conical portion 37 of the inner surface of the yoke 23, rotate around the axes 38. With further movement of the matrix 24 of the surface 41 R of the levers 39 pass from the conical section 37 to the cylindrical part 36 of the inner surface of the holder 23. The matrix then moves h longer than the length hi of the conical section 37 of the inner surface of the holder 23. In this position, the levers 39 are closed to each other along the axis of the matrix, forming their surfaces 42 cylindrical cavity coaxial with the matrix 24, which covers the outer surface of the cylindrical process.

In this closed position, the levers 39 completely overlap from the punch side the working cavity 27 of the matrix 24;

With further movement of the slider, the punch 21 acts on the jumper of the stamped part, moving it together with the matrix 24 until the end of the hollow process stops against the end of the ejector sleeve 28, which in this position abuts against the spacer ZT and through it onto the machine frame. At this time, the hollow process is strung with its cavity on the rod 44. Further re-. pushing the punch forward causes the walls of the hollow process to settle and extrude the metal into a closed working cavity 27, made in the form of a part flange. The rod 44 placed in the cavity of the hollow process excludes possible folding on the inner surface of the hollow process:

After completion of the flange shaping, the backward stroke of the slider begins

14. - . ;. ; .

In this case, the punch 21 leaves the cavity of the part, and the rods 43 depart from the matrix 24. Under the influence of the spring 25, the matrix 24 slides along the inner surface

clips 23 are returned to the front home position. During this movement, the levers 39 with their shoulders 40 interact with the end walls 35 of the grooves 34, and the copy surfaces 41 pass from the cylindrical part 36 of the inner surface of the cage 23 to its conical part. 37. As a result, the levers 39 are forced to open and the working surfaces 42 move beyond the flange on the part process. Forced opening of the levers 39 increases the reliability of the device. Then, under the influence of the ejector 33 of the ejection mechanism from the matrix, the ejector pins 30 are moved, which through the part 29 communicate the movement of the ejector sleeve 28. The latter, acting on the end face of the hollow process, removes the finished part from the matrix, while removing it from the sliding rod 44 .., . .,; :

Thus, as a result of parallel-sequential technological transitions of stamping, axisymmetric hollow parts are produced with a bridge, a hollow process and a flange in the middle part of the process on a multi-position machine with integral dies.

,:; .: -... V. :. : /. :

Formul and zob. Retention device for producing axisymmetric hollow stepped parts on a multi-position cold stamping machine with integral dies, containing a cutting mechanism mounted on / the bed, a transfer mechanism, a matrix unit with matrix units and corresponding punches, -installed in the punch holders fixed in the slider, with the exception that, in order to reduce metal consumption, improve product quality and reduce the complexity of manufacturing parts with a flange in the middle part, it is equipped securing a punch in the punch holder and a matrix forming unit of the flange forming coaxially with it, made in the form of a cage fixed in the frame, the inner surface of which is formed by mating cylindrical and conical sections, the last of which is located on the side of the end of the cage facing the punch, and on the side the end face of the holder opposite the punch, made at least three longitudinal grooves evenly spaced around the circumference, and a spring-loaded matrix with a working cavity, is set longitudinally displaced in the cage, on the lateral surface of which there are made through grooves located correspondingly to the grooves on the cage, with two-arm levers pivotally mounted in them, one shoulder of each of which is arranged with longitudinal movement in the corresponding clip groove, and the other shoulder is made with supporting surface in the form of a part of a conical surface with the possibility of interaction with the inner surface of the cage and with the working surface facing the longitudinal axis of the device w made as part of the surface closed in the circumferential direction at

the closed position of the second arm levers, while the matrix is made with a spring loaded ejector sleeve mounted coaxially with its working surface with a rod located therein rigidly fixed to the bed; The punch holder is made with stop rods rigidly fixed on it and installed to interact with the end face of the die, the length of the stop rods exceeding the length of the punch and the length of the conical section of the inner surface of the holder not exceeding the stroke length of the matrix.

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