CN115837443A - Inner boss ring piece forming device - Google Patents

Abstract

The invention relates to the field of inner boss ring pieces, and discloses an inner boss ring piece forming device which comprises an upper die and a lower die, wherein the upper die can be pressed down twice, the lower side of the upper die is a flat pressing surface, the flat pressing surface is downward when the upper die is pressed down for the first time, a forming bulge is arranged on the upper side of the upper die, the upper die is turned over when the upper die is pressed down for the second time, the forming bulge faces downward, a forming groove is formed in the lower die, the flat pressing surface can cover the forming groove, and the forming bulge can be accommodated in the forming groove. The invention can quickly form the product, keep the continuity of the streamline of the product, improve the quality of the product and reduce the processing allowance.

Description

Inner boss ring piece forming device

Technical Field

The invention relates to the field of inner boss ring pieces, in particular to an inner boss ring piece forming device.

Background

As shown in figure 6, the inner boss ring is an annular product with the shape of a ring 15 and a circle of inner bosses 16 in the middle of an inner hole, and according to the requirement of the high-temperature environment in use, the inner boss ring generally needs to be forged to meet the use requirement. However, the shape of the part is complex, and the conventional forging forming difficulty is high.

The conventional manufacturing method at present is generally as follows: the product is first forged into a regular annular blank, then machined to the inner boss 16 and finally machined to the final required dimensions. However, the method has the advantages of large machining allowance, low material utilization rate, low production efficiency and high manufacturing cost; the machining stress is large, and the final size precision is difficult to control; through two working procedures of forging and machining, the product flow line is discontinuous, the factors needing to be controlled are more, and the quality is unstable. Therefore, a new forming scheme is required to be found, so that the product can be formed quickly, the continuity of the product flow line is kept, the product quality is improved, and the processing allowance is reduced.

Disclosure of Invention

The invention aims to provide an inner boss ring forming device, which can enable a product to be formed quickly, maintain the continuity of a product streamline, improve the product quality and reduce the machining allowance.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides an inner boss ring piece forming device, includes mould and lower mould, goes up the mould and can push down twice, goes up the mould downside and be the concora crush face, and the concora crush face is down when going up the mould and pushing down for the first time, goes up the mould upside and is equipped with the arch of taking shape, goes up the mould of upset when going up the mould and pushing down for the second time, takes shape protruding the face down, is equipped with the shaping groove on the lower mould, and the concora crush face can cover the shaping groove, takes shape the arch and can hold in the shaping inslot.

The beneficial effect of this scheme does:

1. forging an annular blank, putting the blank into a forming groove after discharging, pressing down the upper die twice, pressing down the blank for the first time, and pressing down the flat pressing surface of the upper die until the flat pressing surface is contacted with the upper surface of the lower die, so that the lower part of the blank is filled in the forming groove; and pressing down for the second time, overturning the upper die, enabling the forming bulge to press the blank downwards until the lower surface of the upper die is contacted with the upper surface of the lower die, forming a cavity between the upper die and the lower die, and filling the blank in the cavity to form.

2. An inner boss does not need to be machined, and the product can be quickly formed.

3. Compared with the prior art, the method needs two processes, only needs one process, needs fewer quality factors to be controlled, keeps the continuity of the product streamline, and improves the quality of the product.

4. Compared with the prior art, the size of the formed blank is closer to that of a product, and the allowance generated by machining is greatly reduced.

5. When the upper die is pressed down for the first time, the surface of the flat pressing surface is flat, so that no lateral force is generated on the blank, the blank is not easy to extrude out of the forming groove, the precision of the forming size of the blank is improved, and the generated allowance is reduced; because the flat pressing surface has a flat surface, the downward pressure generated on the blank is more uniform, so that the density of the ring part after the blank is formed is more uniform, and the forming quality of the lower part of the blank is improved.

6. When the upper die is pressed down for the second time, because the quality of the upper die is unchanged, the pressing force generated on the lower part of the blank is close to that of the first pressing, because the limit positions of the upper die pressed down for the two times are unchanged, the upper die is stopped after being contacted with the upper surface of the lower die, and the lower part of the blank is already formed during the first pressing, the influence of the second pressing on the ring part formed by the blank is small, the secondary stress of the ring part is avoided, the density change of the ring part is small, and the forming quality is more stable; because the blank is pressed downwards for the first time to be parallel to the upper surface of the lower die, the lateral force of the forming convex side surface to the upper part of the blank is counteracted by the side wall of the forming groove, the blank is difficult to extrude out of the forming groove, the precision of the forming dimension of the blank is not reduced, and the generated allowance is not increased.

Preferably, as an improvement, the lower die comprises a guide post, a backing ring and a lower die sleeve, the backing ring is sleeved on the guide post in a sliding connection manner, the lower die sleeve is sleeved on the backing ring in a sliding connection manner, and the forming groove is defined by the guide post, the lower die sleeve and the backing ring with the heights gradually decreased in sequence. According to the arrangement, the die is conveniently removed after the blank is formed into the inner boss ring piece, specifically, the upper die, the lower die sleeve and the backing ring are sequentially taken down, and finally, the inner boss ring piece is taken down from the guide column, so that the die is more convenient and quicker compared with the mode of connecting by means of a clamp or a bolt.

Preferably, as an improvement, the upper die is provided with a guide hole, the guide hole penetrates through the flat pressing surface and the forming protrusion, and the guide hole penetrates through the guide post in a sliding connection manner. So set up, go up the mould and when pushing down twice, all lead through the guide post, guarantee to go up the mould and vertically push down, it is more even to the holding down force that the blank produced, and then makes the density at each position of blank more even, and then improves the quality that the blank lower part takes shape.

Preferably, as a modification, the guide post is formed by a convex plane rotating around the symmetry axis, and the guide post and the forming protrusion can cooperate with each other to form the inner boss. So set up, when going up the mould and pushing down for the second time, the protruding and guide post that take shape mutually supports, and extrusion blank is inboard, improves the inboard density of blank, makes interior boss take shape fast, has the density that is higher than the ring part after making interior boss take shape, and then makes interior boss can not damage because of the size is little than the ring in the use easily.

Preferably, as a modification, the lower outer side of the guide post is formed with a first guide slope with a flared lower portion. So set up, during the drawing of patterns, increase the contact surface of inner boss ring spare and guide post, be convenient for guide post drive inner boss ring spare and upwards mention, prevent that the contact surface undersize from producing the damage to inner boss ring spare.

Preferably, as a modification, a second guiding inclined surface with a lower portion expanding inwards is formed inside the lower die sleeve. The arrangement is convenient for mounting the lower die, specifically, the backing ring is firstly placed between the first guide inclined plane and the second guide inclined plane, and then the backing ring is pressed down along the first guide inclined plane and the second guide inclined plane, so that the guide column is tightly abutted against the lower die sleeve; the first guide inclined plane, the second guide inclined plane and the backing ring form a forming groove, when the upper die is pressed down for the first time, because the cross-sectional area of the lower part of the forming groove is smaller than that of the upper part, the lower part of the forming groove is filled with the blank preferentially, the upper part of the blank is prevented from being extruded out of the forming groove before the blank is filled in the forming groove, the allowance is reduced, and the forming precision is improved.

Preferably, as an improvement, the lower die sleeve is provided with a through hole. So set up, the bolt passes the through-hole card and sheathes in at the lower mould, and the die sleeve is moulded in the handling of being convenient for.

Drawings

FIG. 1 is a three-dimensional isometric view of a blank of an embodiment;

FIG. 2 is a three-dimensional isometric view of the embodiment before the upper die is inverted;

FIG. 3 is an exploded three-dimensional isometric view of the structure of the lower die of the embodiment;

FIG. 4 is a top view of the embodiment after the upper die is inverted;

FIG. 5 isbase:Sub>A cross-sectional view A-A of FIG. 4;

figure 6 is a cross-sectional view of the inner boss ring.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the forming die comprises a blank 1, an upper die 2, a flat pressing surface 3, a forming protrusion 4, a guide hole 5, a lower die 6, a guide column 7, a backing ring 8, a lower die sleeve 9, a forming groove 10, a first guide inclined surface 11, a second guide inclined surface 12, a through hole 13, a cavity 14, an inner boss 15 and a ring piece 16.

Examples

The examples are substantially as shown in FIGS. 2-5: an inner boss ring forming device comprises an upper die 2 and a lower die 6, wherein as shown in figure 1, a blank 1 of an inner boss ring is processed, and as shown in figure 6, a finished inner boss ring after processing comprises an inner boss 15 and a ring 16 which are integrally formed.

As shown in fig. 2, the lower side of the upper die 2 is a flat pressing surface 3, the upper side of the upper die 2 is integrally formed with a forming protrusion 4, the upper die 2 is provided with a guide hole 5, the guide hole 5 is vertically arranged, and the guide hole 5 penetrates through the flat pressing surface 3 and the forming protrusion 4.

As shown in fig. 3, the lower mold 6 includes a guide post 7, a backing ring 8 and a lower mold sleeve 9, the backing ring 8 is slidably sleeved on the guide post 7, the lower mold sleeve 9 is slidably sleeved on the backing ring 8, after the lower mold 6 is installed, the lower surfaces of the guide post 7, the backing ring 8 and the lower mold sleeve 9 are located on the same plane, and the guide post 7, the lower mold sleeve 9 and the backing ring 8 with successively decreasing heights are enclosed to form a forming groove 10; the flat pressing surface 3 can cover the forming groove 10, and the forming protrusion 4 can be accommodated in the forming groove 10.

As shown in fig. 5, the guide post 7 passes through the guide hole 5, the guide post 7 is formed by rotating 360 degrees around a symmetry axis by a convex plane, and a first guide inclined surface 11 with an expanded lower part is formed at the outer side of the lower part of the guide post 7; two radial through holes 13 which are symmetrically arranged are formed in the lower die sleeve 9, and a second guide inclined surface 12 with an inner expanded lower part is formed on the inner side of the lower die sleeve 9; the included angles between the first guide inclined plane 11 and the vertical plane and between the second guide inclined plane 12 and the vertical plane are both 2 degrees, and the bottoms of the first guide inclined plane 11 and the second guide inclined plane 12 are both higher than the upper surface of the backing ring 8.

The centers of the upper die 2, the guide post 7, the backing ring 8 and the lower die sleeve 9 are positioned on the same straight line.

The specific implementation steps are as follows:

1. firstly, vertically placing a guide post 7, clamping one end of a plug pin on the side wall of a lower die sleeve 9 through a through hole 13, taking the other end of the plug pin as a hanging part for hoisting, hoisting the lower die sleeve 9 to enable the lower die sleeve 9 to penetrate through the guide post 7, placing a backing ring 8 between the lower die sleeve 9 and the guide post 7, pressing the backing ring 8 down along a first guide inclined plane 11 and a second guide inclined plane 12, and further abutting the guide post 7 and the lower die sleeve 9;

2. then forging an annular blank 1, discharging the blank 1 and putting the blank 1 into a forming groove 10;

3. next, the upper die 2 is pressed down for the first time, the upper die 2 penetrates through the guide post 7, and the flat pressing surface 3 of the upper die 2 presses the blank 1 downwards until the flat pressing surface 3 is in contact with the upper surface of the lower die sleeve 9, so that the lower part of the blank 1 is filled in the forming groove 10;

4. and then, the upper die 2 is pressed downwards for the second time, the upper die 2 is withdrawn from the guide post 7, the upper die 2 is turned over, the upper die 2 penetrates through the guide post 7 again, the forming protrusion 4 presses the blank 1 downwards until the lower surface of the upper die 2 is contacted with the upper surface of the lower die sleeve 9, a cavity 14 is formed among the upper die 2, the guide post 7, the backing ring 8 and the lower die sleeve 9, the blank 1 is filled in the cavity 14, and then the inner boss ring piece is formed.

5. And finally, the upper die 2, the lower die sleeve 9 and the backing ring 8 are taken down in sequence, and finally the inner boss ring piece is taken down from the guide column 7.

6. And (5) processing according to the use requirement, and adjusting the size of the inner boss ring piece to form a final product.

The foregoing is merely an example of the present invention and common general knowledge in the art of designing and/or characterizing particular aspects and/or features is not described in any greater detail herein. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be defined by the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (7)

1. An inner boss ring piece forming device is characterized in that: the upper die can be pressed down twice, the lower side of the upper die is a flat pressing surface, the flat pressing surface faces downwards when the upper die is pressed down for the first time, a forming protrusion is arranged on the upper side of the upper die, the upper die is turned over when the upper die is pressed down for the second time, the forming protrusion faces downwards, a forming groove is formed in the lower die, the flat pressing surface can cover the forming groove, and the forming protrusion can be accommodated in the forming groove.

2. The inner boss ring forming device according to claim 1, wherein: the lower die comprises a guide post, a backing ring and a lower die sleeve, the backing ring is sleeved on the guide post in a sliding connection mode, the lower die sleeve is sleeved on the backing ring in a sliding connection mode, and the forming groove is formed by the guide post, the lower die sleeve and the backing ring which are sequentially and progressively reduced in height.

3. The inner boss ring forming device according to claim 2, wherein: the upper die is provided with a guide hole, the guide hole penetrates through the flat pressing surface and the forming bulge, and the guide column can penetrate through the guide hole.

4. The inner boss ring forming device according to claim 3, wherein: the guide post is formed by the rotation of the convex plane around the symmetry axis, and the guide post and the forming bulge can be matched with each other to form the inner boss.

5. The inner boss ring forming device according to claim 4, wherein: the outer side of the lower part of the guide post forms a first guide inclined plane with the lower part expanded outwards.

6. The inner boss ring forming device according to claim 5, wherein: and a second guide inclined plane with the lower part expanded inwards is formed at the inner side of the lower die sleeve.

7. The inner boss ring forming device according to claim 6, wherein: the lower die sleeve is provided with a through hole.

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