CN216372164U - Device for marking drawing and forging directions - Google Patents

Abstract

The utility model discloses a device for marking the drawing forging and pressing direction, which comprises: the metal presses the hammer and connect in the handle of hammer upper end one side is pressed to the metal, the lower tip surface of hammer is pressed to the metal is the arc curved surface that the girth gradually reduces from top to bottom, the height of arc curved surface is 10 ~ 30 mm. The forging and pressing direction is marked on the surface of the metal blank needing forging drawing through the pressing concave pits, so that the accurate adjustment of the forging and pressing direction in the subsequent forging heating times is facilitated, and the uniformity of blank deformation is improved; the pit marks cannot be damaged in the subsequent heating process, and are easy to identify; the pit marks can be gradually reduced in subsequent hot drawing forging until the pit marks disappear finally, and the quality of the blank cannot be influenced; the device has simple structure, easy manufacture and convenient use.

Description

Device for marking drawing and forging directions

Technical Field

The utility model belongs to the technical field of forging dies, and particularly relates to a device for marking a drawing forging direction.

Background

When a metal blank is forged and drawn on a flat anvil of a press, a square-square system is often adopted for changing the cross section of the blank in the deformation process, and the blank is turned over by 90 degrees between forging passes. When the blank is forged and drawn, the deformation characteristics of the lower area of the anvil are similar to the upsetting deformation rule during each pressing-down, the deformation unevenness on the cross section of the blank is very obvious under the influence of the shape, the size and the friction of the flat anvil, and three areas of a difficult deformation area (I), a severe deformation area (II) and a free deformation area (III) are formed, as shown in figure 1. Because the turning angles of the blank along the axial direction between different courses are all 90 degrees, the deformation distribution of the transverse different deformation areas can form obvious regular distribution, and as shown in fig. 2, the A, B area is a difficult deformation area. If the continuous multiple times of forging are carried out according to the original forging and pressing direction, the transverse structure of the blank presents obvious regular distribution, and the phenomenon of uneven structure is formed.

To reduce the effect of the aforementioned hard zones (A, B), the cross-section is often octagonal after the square-to-square drawing is completed, as shown in FIG. 3. During the subsequent fire first-pass forging, the forging direction is staggered with the upper fire first-pass reduction direction (A or B), and the forging is carried out by deflecting 45 degrees, namely, the adjacent surfaces of the A or B surfaces are selected to start forging so as to improve the uniformity of the transverse deformation of the drawing process. However, after the cross section of the blank is eight directions, if the main deformation forging direction (a or B) of the previous forging is not marked, the forging direction in the next forging can only be randomly selected, which causes uncertainty of distribution of transverse deformation and may affect the uniformity and stability of the blank structure performance. In order to accurately select the direction to be forged at the next forging, a mark needs to be made on the billet.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems in the prior art, the present invention provides a device for marking the direction of elongation forging. The technical problem to be solved by the utility model is realized by the following technical scheme:

an apparatus for marking a direction of a drawn forging comprising: the metal presses the hammer and connects in the handle of metal pressure hammer upper end one side, the lower tip surface of hammer is pressed to the metal is the arc curved surface that the perimeter reduces gradually from top to bottom.

Further, the height of the arc-shaped curved surface is 10-30 mm; the diameter of the arc-shaped curved surface is 50-100 mm.

Further, the shape of the metal hammer is any one of a sphere, a hemisphere, a spherical crown, an ellipsoid, a semi-ellipsoid and an ellipsoid crown.

Further, the metal pressing hammer is of a hollow structure.

The utility model has the beneficial effects that:

1. the forging and pressing direction is marked on the surface of the metal blank needing forging drawing through the pressing concave pits, so that the accurate adjustment of the forging and pressing direction in the subsequent forging heating times is facilitated, and the uniformity of blank deformation is improved;

2. the pit marks cannot be damaged in the subsequent heating process, and are easy to identify;

3. the pit marks can be gradually reduced in subsequent hot drawing forging until the pit marks disappear finally, and the quality of the blank cannot be influenced;

4. the device has simple structure, easy manufacture and convenient use.

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Drawings

FIG. 1 is a deformation characteristic of a cross section of a blank during a blank drawing process;

FIG. 2 is a schematic diagram showing deformation of the area under the hammer when the blank is turned 90 degrees during drawing in the square-square system;

FIG. 3 is a schematic diagram of eight-square billet forging and cross-sectional direction transformation;

FIG. 4 is a schematic structural view of the hemispherical press hammer;

FIG. 5 is a schematic structural view of a spherical crown shaped press hammer;

FIG. 6 is a schematic view of the stamping direction of indentation marks.

Description of reference numerals:

1-metal pressing hammer; 2-a handle.

Detailed Description

The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.

Referring to fig. 4 and 5, an embodiment of the present invention provides a device for marking a drawing and forging direction, including a metal pressing hammer 1 and a handle 2 connected to one side of an upper end of the metal pressing hammer 1, wherein an outer surface of a lower end of the metal pressing hammer 1 is an arc-shaped curved surface whose circumferential length gradually decreases from top to bottom, that is, the metal pressing hammer 1 may be any one of a spherical shape, a hemispherical shape, a spherical crown shape, an ellipsoidal shape, a semi-ellipsoidal shape, and an ellipsoidal crown shape. Fig. 4 and 5 show schematic structural views of the hemispherical press hammer and the spherical crown press hammer. The metal pressing hammer 1 can be of a solid structure or a hollow structure, and the pressing hammer 1 of the hollow structure can reduce the weight of the whole device, but the strength in use is ensured.

The metal pressing hammer 1 is pressed on the surface of a blank, an inwards concave arc-shaped groove can be formed on the surface of the blank, the original shape of the arc-shaped groove can be automatically restored in the subsequent forging process, and the surface quality of the blank is not influenced.

The height of the arc-shaped curved surface of the metal pressing hammer 1 is 10-30 mm, and the diameter of the arc-shaped curved surface is 50-100 mm. The depth of the arc-shaped curved surface pressed into the surface of the blank is at least 10 mm.

The indentation may be visually recognized, and the present invention is not particularly limited thereto.

After the main deformation is finished, the metal pressing hammer 1 is pressed on one surface of a square blank through the handle 2, then the forging blank is chamfered into an octagon shape, the indentation mark can be reserved due to small deformation and can be used as a mark of the original drawing main forging and pressing direction, metal near the indentation can also flow in the subsequent forging and deformation process of the blank, and when the deformation is large enough, the indentation can be gradually reduced and finally disappears.

Further, the metal hammer 1 may be made of metal material such as die steel, tool steel, etc., and the handle 2 is a long rod made of metal, wood, or other material meeting the use requirement, and is welded to the metal hammer 1 for moving the metal hammer 1.

Referring to fig. 6, when the device is needed, an operator places a metal press hammer 1 on the forged blank through a handle 2, presses the press hammer into the surface of the blank by a certain depth by using a press, a forging hammer and other equipment, and forms a pit to mark the forging direction.

The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.

Claims (4)

1. A device for marking the direction of elongation forging comprising: the metal presses the hammer and connects in the handle of metal pressure hammer upper end one side, the lower tip surface of hammer is pressed to the metal is the arc curved surface that the perimeter reduces gradually from top to bottom.

2. The device for marking the drawing and forging direction as claimed in claim 1, wherein the height of the arc-shaped curved surface is 10-30 mm; the diameter of the arc-shaped curved surface is 50-100 mm.

3. The apparatus for indicating the direction of a drawing and forging according to claim 1 or 2, wherein said metal hammer is any one of a spherical shape, a hemispherical shape, a spherical crown shape, an ellipsoidal shape, a semi-ellipsoidal shape, and an ellipsoidal crown shape.

4. The apparatus for marking the direction of a elongation press according to claim 3 wherein said metal hammer is of hollow construction.

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