CN210450757U

CN210450757U - Die for manufacturing inner arc-shaped forge piece

Info

Publication number: CN210450757U
Application number: CN201921404809.5U
Authority: CN
Inventors: 冯磊; 汪森林; 陶科华
Original assignee: Zhangjiagang Hengtong Ring Forging Manufacturing Co Ltd
Current assignee: Zhangjiagang Hengtong Ring Forging Manufacturing Co Ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-05-05
Anticipated expiration: 2029-08-27

Abstract

The utility model discloses a mould for making interior bow-shaped forging, including cylindrical home roll, blank and follow-up core roller, the blank is arranged in between home roll and core roller, and the core roller includes the core roller body, is provided with one section straight flat boss on the middle part outline of core roller body, and the upper and lower both ends of straight flat boss pass through two sections tangent circular arcs between the core roller body respectively, and two sections circular arcs include circular arc section I and circular arc section II that set gradually to both sides by straight flat boss, and circular arc section I is convex circular arc, and circular arc section II is concave circular arc, and the horizontal central line of straight flat boss overlaps mutually with the horizontal central line of blank. By adopting the die, the input amount of raw materials is reduced, the processing cost is reduced, the turning time is reduced, the mechanical property of the forged piece after the ring rolling is finished is improved, the service life of the forged piece is prolonged, and the condition of cracking in the using process is reduced.

Description

Die for manufacturing inner arc-shaped forge piece

Technical Field

The utility model relates to a production technical field of ring forging, concretely relates to mould for making interior bow-shaped forging.

Background

The tyre segment mould itself is divided into a centripetal organ portion and a moulding cavity portion, each of which in turn comprises a number of components. The centripetal mechanism part comprises a hanging ring, an upper cover, a T-shaped block, a middle die sleeve, a sliding block, a guide strip, a bottom plate, a friction reducing plate and the like. The slider is usually an arc-shaped forging, and in the ring rolling process, due to the complicated shape, a lot of excess materials need to be machined in the process of machining a forging blank into a finished product in a rectangular mode, so that the production time is increased, and meanwhile, the production cost is also increased. How to solve the above problems is a matter that those skilled in the art have been dedicated to solve.

Disclosure of Invention

The utility model aims at overcoming the not enough of prior art, providing a mould for making interior bow-shaped forging, this mould simple structure can reduce the input of raw and other materials, effectively saves the time of car processing.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a mould for making interior bow-shaped forging, includes cylindrical main roll, blank and follow-up core roller, the blank is arranged in between main roll and core roller, the core roller includes the core roller body, the upper end of core roller body is held by the centre gripping and is being pressed from both sides the upper and lower extreme of dress mechanism and be the free end, be provided with one section straight flat boss on the middle part outline of core roller body, straight flat boss's upper and lower both ends respectively with pass through two sections tangent circular arcs between the core roller body and pass through, two sections circular arcs include by straight flat boss I and circular arc section II that set gradually to both sides, circular arc section I is convex circular arc, circular arc section II is concave circular arc, straight flat boss's horizontal central line with the horizontal central line of blank overlaps mutually, straight flat boss's height is H₁Radius of the convex arc is D₁The vertical height of the cavity in the forged piece after machining is H₂Horizontal depth of H₃The distance from the outer side wall of the straight flat boss to the outer side wall of the core roller body connected with the straight flat boss is D₂Wherein H is₁+D₁＜H₂＜H₁+2D₁，1/2H₃＜D₂＜H₃。

Preferably, the radian of the circular arc section I is 60-100 degrees.

In a specific embodiment, the arc of the circular arc section i is 90 °.

Preferably, the diameter of the circular arc section I is equal to that of the circular arc section II.

Preferably, the radian of the circular arc section I is the same as that of the circular arc section II.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage: the utility model discloses a mould for making interior bow-shaped forging, its core roll has adopted the core roll body, set up one section straight flat boss on the middle part outline of core roll body, the upper and lower both ends of this straight flat boss pass through two sections tangent circular arcs between the core roll body respectively, through this setting up mode, in the ring rolling process, through straight flat boss, improved the mechanical properties of the inner straight flange of processing back forging die cavity to a certain extent, improved the life of product, be favorable to reducing the material consumption of raw and other materials simultaneously, and through setting up two sections transition circular arcs, make things convenient for mould processing shaping, the work load of car processing has been reduced, guarantee the metal to flow to die cavity bottom position in the ring rolling process, make the die cavity bottom fill, and guaranteed to pass through smoothly between the outline of the core roll body of straight flat boss and upper and lower both ends, be favorable to reducing the condition that the fracture takes place in the use, the service cycle of the forging is greatly prolonged.

Drawings

Fig. 1 is a schematic structural diagram of a die for manufacturing an inner arcuate forging according to the present invention;

wherein: 1. a main roller; 2. a blank; 3. a core roll; 31. a core roll body; 32. a straight flat boss; 33. an arc section I; 34. and an arc section II.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and specific embodiments.

A die for manufacturing an inner arc forging comprises a cylindrical main roller 1, a blank 2 and a follow-up core roller 3, wherein the blank 2 is arranged between the main roller 1 and the core roller 3, and the die is shown in figure 1. The core roll 3 includes a core roll body 31, and the upper end of the core roll body 31 is held between a clamping mechanism (not shown) and the lower end is a free end.

In this example, a straight flat boss 32 is disposed on the outer contour of the central portion of the core roller body 31, and as shown in fig. 1, the upper and lower ends of the straight flat boss 32 are respectively transited to the core roller body 31 through two tangential arcs. The two sections of circular arcs comprise a circular arc section I33 and a circular arc section II 34 which are sequentially arranged from the straight flat boss 32 to two sides, and refer to figure 1. The arc section I33 is a convex arc, the arc section II 34 is a concave arc, and the horizontal center line of the straight flat boss 32 is overlapped with the horizontal center line of the blank 2. Here, the straight flat bosses 32 have a height H₁Radius of the convex arc is D₁The vertical height of the cavity in the forged piece after machining is H₂Horizontal depth of H₃The distance between the outer side wall of the straight flat boss 32 and the outer side wall of the core roller body 31 connected with the straight flat boss is D₂Wherein H is₁+D₁＜H₂＜H₁+2D₁，1/2H₃＜D₂＜H₃. By arranging the straight flat boss 32, in the ring rolling process, the mechanical property of the inner straight edge of the formed forging die cavity is improved to a certain extent through extrusion, the service life of a product is prolonged, the use of raw materials is reduced, and the use cost of the raw materials is reduced.

In this example, the arc of the arc segment I33 is 60-100 deg. The radian of this circular arc section I33 is adjusted according to the shape of product, if the radian is too big, can lead to the product die cavity bottom after the processing to fill not full, if too little, then the subsequent car work load of processing of meeting greatly increased. In one specific embodiment, the arc of the arc segment I33 is 90 degrees.

In this example, the diameter of the arc section i 33 is equal to that of the arc section ii 34, and the radian of the arc section i 33 is equal to that of the arc section ii 34.

The straight flat boss 32 and the core roller body 31 at the upper end and the lower end of the straight flat boss are transited through two sections of arcs, so that the cracking of a formed product in the using process is reduced, and the arc sections I33 and II 34 which are equal in diameter and same in radian are adopted, so that metal can better flow to the bottom of a cavity in the ring forging process, the metal can be fully filled, and the service cycle of a forged piece after machining is greatly prolonged.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The die for manufacturing the inner bow forging comprises a cylindrical main roller, a blank and a follow-up core roller, wherein the blank is arranged between the main roller and the core roller, and the die is characterized in that the core roller comprises a core roller body, the upper end and the lower end of the core roller body are clamped on a clamping mechanism and are free ends, a straight flat boss is arranged on the outer contour of the middle part of the core roller body, the upper end and the lower end of the straight flat boss are respectively transited with the core roller body through two tangent circular arcs, the two circular arcs comprise a circular arc section I and a circular arc section II which are sequentially arranged from the straight flat boss to two sides, the circular arc section I is a convex circular arc, the circular arc section II is a concave circular arc, the horizontal central line of the straight flat boss is overlapped with the horizontal central line of the blank, and the height of the straight flat boss is H₁Radius of the convex arc is D₁The vertical height of the cavity in the forged piece after machining is H₂Horizontal depth of H₃The distance from the outer side wall of the straight flat boss to the outer side wall of the core roller body connected with the straight flat boss is D₂Wherein H is₁+D₁＜H₂＜H₁+2D₁，1/2H₃＜D₂＜H₃。

2. The die for making an inner arcuate forging as set forth in claim 1, wherein said arc segment i has an arc of 60 ° -100 °.

3. The die for making an inner arcuate forging as set forth in claim 2, wherein said arc segment i has an arc of 90 °.

4. The die for manufacturing an inner arcuate forging according to claim 1, wherein the circular arc section I and the circular arc section II are equal in diameter.

5. The die for manufacturing the inner arcuate forging according to claim 4, wherein the arc sections I and II have the same radian.