Round blank forging die

Abstract

The utility model discloses a round blank forging die in the technical field of metal forging, and the round blank forging die comprises a die assembly and a buffer element, the die assembly comprises an upper die and a lower die which are the same in shape and size and are used for extruding and deforming a blank into a round blank; the buffering element is detachably connected to the upper die and the lower die, the buffering element is used for enabling the working face of the upper die and the working face of the lower die to directly face each other, and a gap is reserved between the upper die and the lower die. The buffering element enables the upper die to vertically move downwards and absorb part of impact of the hammer head to form buffering, the situation that after the upper die makes contact with the lower die, the impact force of the push head is directly conducted to the base to form hard contact is avoided, and when the hammer head moves upwards after hammering is completed, the buffering element enables the upper die to restore to the initial state through elasticity. According to the scheme, the problem that when an existing round blank forging tool is used, a base or a hammer head of forging and pressing machinery is possibly damaged is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal forging, and particularly relates to a forging die for circular blanks. Background Art

[0002] Forging is a metal processing technology, mainly referring to applying external force to a metal blank through forging machinery to make it undergo plastic deformation, so as to obtain the required shape, size and improve its mechanical properties. Forging is one of the very old and basic technologies in metal processing and is still widely used in modern industrial production.

[0003] In the forging of circular blanks, usually workers use tools to hold the blank, continuously rotate the blank during the forging process, and at the same time the hammer head of the forging machinery also continuously hammers. As the workers continuously adjust the angle, the circular blank is forged in this way. However, for the circular blank forged in this way, its surface often has flat planes, so that the forged blank is not a circular blank that meets the requirements. In order to obtain a circular blank that meets the requirements, two toolings with arc-shaped surfaces are mainly used now. One tooling is placed on the forging base with the arc-shaped surface facing up, then the blank is placed in the arc-shaped surface, and then another tooling is covered on the blank, and then the hammer head of the forging machinery hammers the upper tooling. During the hammering process, workers use tools to continuously adjust the force-bearing surface of the blank. In this way, a circular blank that meets the requirements can be obtained after forging. However, for this kind of tooling for forging circular blanks, when the blank is placed in the tooling for hammering, the base, the hammer head and the two toolings are in hard contact. In this way, the base and the hammer head of the forging machinery will be damaged due to long-term hard contact, or the service life of the base and the hammer head of the forging machinery will be greatly shortened. Summary of the Utility Model

[0004] The utility model aims to provide a forging die for circular blanks to solve the problem that the base or the hammer head of the forging machinery may be damaged when the existing forging tooling for circular blanks is used.

[0005] To solve the above technical problems, the utility model provides the following technical solution: A forging die for circular blanks includes a die assembly and a buffer element. The die assembly includes an upper die and a lower die that are identical in shape and size and are used to extrude and deform the blank into a circular blank.

[0006] The buffer element is detachably connected to the upper die and the lower die. The buffer element is used to make the working surfaces of the upper die and the lower die face each other, and leave a spacing between the upper die and the lower die. When the hammer head of the forging machine contacts the upper die, the buffer element makes the upper die move vertically downward and absorbs part of the impact of the hammer head to form a buffer, avoiding directly conducting the impact force of the push head to the base to form a hard contact after the upper die and the lower die contact. When the hammer head moves upward after hammering, the buffer element makes the upper die return to its initial state through elasticity.

[0007] The working principle of the present utility model: During use, place the lower die on the base of the forging machine with the working surface of the lower die facing upward, then place the upper die with the working surface facing downward opposite the lower die, and then install the buffer element on the lower die and the upper die. At this time, the buffer element supports the upper die, leaving a certain spacing between the upper die and the lower die. Then, hold the heated blank with tools and place it between the upper die and the lower die, and start the forging machine. When the forging machine runs, the hammer head moves downward and first hammers on the upper die. The upper die receiving the hammering moves vertically downward and hammers on the blank. At this time, the blank is extruded by the working surfaces of the upper die and the lower die and thus deforms into a curved surface that fits the working surfaces of the upper die and the lower die. During the process of the upper die moving downward and hammering on the blank, the buffer element absorbs part of the impact force received by the upper die under its elastic action and is in a compressed state. When the hammer head moves upward after hammering, the buffer element drives the upper die to move upward and return to its initial state under its elastic action. At this time, one hammering of the blank is completed. Then, the worker uses tools to hold the blank at an angle for the next hammering until a circular blank is forged.

[0008] The beneficial effects of the present utility model:

[0009] 1. In this solution, the elasticity of the buffer element absorbs the impact forces received by the upper die and the lower die during the forging process, thereby reducing the reaction forces received by the base and the hammer head of the forging machine. In this way, the impact force during the hard contact between the base and the hammer head and the upper die and the lower die is reduced, and the possibility of damage to the base and the hammer head due to large impact forces is reduced, extending the service life of the base and the hammer head.

[0010] 2. Compared with the existing forging dies for circular blanks, during the existing forging process, one worker needs to hold the blank with tools, and another worker needs to use tools to stabilize the position of the upper die. Therefore, multiple workers are required to cooperate to complete the forging work of the circular blank. In this solution, the buffer element fixes the upper die directly above the lower die, so there is no need for another worker to use tools to stabilize the position of the upper die. Therefore, the number of workers is reduced and the labor cost is saved.

[0011] Further, the lower die is in a rectangular block shape, and an arc-shaped groove 1 for extruding the blank into an arc-shaped curved surface is provided at the center of the upper surface of the lower die.

[0012] Further, the upper die is in a rectangular block shape, and an arc-shaped groove 2 for extruding the blank into an arc-shaped curved surface is provided at the center of the lower surface of the upper die.

[0013] Further, the buffer element includes four "U"-shaped spring steels. The spring steels are mirror-mounted in groups of two at both ends of the die assembly. The two spring steels in each group are respectively arranged on the front and back sides of the same end of the die assembly; and one end of the spring steel is detachably connected to the upper die, and the other end is detachably connected to the lower die. The purpose is that through this setting, the upper die can be stably supported by the four "U"-shaped spring steels, and during the forging process, the upper die can move vertically downward without deviation in position, so the stability is strong.

[0014] Further, a connecting rod is detachably connected to the bent portion of the two spring steels in the same group. The purpose is that through the connecting rod, the movement of the spring steels in the same group is restricted, and the situation that the distance between the two spring steels in the same group increases due to the impact force during the forging process and affects the stability of the upper die is avoided.

[0015] Further, transverse through holes are respectively provided at both ends of the upper die, and transverse through holes are also respectively provided at both ends of the lower die. Pin shafts for inserting into the through holes are fixedly connected to both ends of each spring steel. The purpose is that through this setting, the spring steel can be directly installed on the upper die and the lower die by inserting the pin shaft into the through hole, so the installation and disassembly are both convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a forging die for circular blanks of the present invention;

[0017] Figure 2 is Figure 1 a schematic structural diagram of the upper die and the lower die in

[0018] Figure 3 is Figure 1 a schematic structural diagram of the spring steel in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following is a further detailed description through specific embodiments:

[0020] The reference numerals in the drawings of the specification include: upper die 1, spring steel 2, arc-shaped groove 2 3, lower die 4, through hole 5, pin shaft 6, connecting rod 7.

[0021] The embodiment is basically as shown in the attached Figure 1 ~AttachedFigure 3 As shown in:

[0022] A forging die for circular blanks includes a die assembly and a buffer element. The die assembly includes two upper dies 1 and lower dies 4 with the same shape and size, which are used to extrude and deform the blank into a circular blank. The lower die 4 is in the shape of a rectangular block, and a first arc-shaped groove for extruding the blank into an arc-shaped curved surface is provided at the center of the upper surface of the lower die 4. The upper die 1 is in the shape of a rectangular block, and a second arc-shaped groove 3 for extruding the blank into an arc-shaped curved surface is provided at the center of the lower surface of the upper die 1. A transverse through-hole 5 is provided at each end of the upper die 1, and a transverse through-hole 5 is also provided at each end of the lower die 4.

[0023] The buffer element includes four "U"-shaped spring steels 2. Pin shafts 6 perpendicular to their ends are integrally formed at both ends of the spring steel 2. The spring steels 2 are mirror-mounted in groups of two at the left and right ends of the die assembly, and the two spring steels 2 in each group are respectively arranged on the front and rear sides of the same end of the die assembly. Moreover, the pin shaft 6 at one end of the spring steel 2 is inserted into the through-hole 5 of the upper die 1, and the other end is inserted into the through-hole 5 of the lower die 4. A connecting rod 7 is detachably connected to the bent portion of the two spring steels 2 in the same group.

[0024] The specific implementation process is as follows:

[0025] During use, place the lower die 4 on the base of the forging machine with the first arc-shaped groove of the lower die 4 facing upward, then place the second arc-shaped groove of the upper die 1 facing downward and directly opposite the first arc-shaped groove on the lower die 4. Then install the four "U"-shaped spring steels 2 on the lower die 4 and the upper die 1. At this time, the four spring steels 2 support the upper die 1, leaving a certain gap between the upper die 1 and the lower die 4. Then clamp the heated blank with tools and place it between the upper die 1 and the lower die 4, and start the forging machine. When the forging machine runs, the hammer head moves downward and first strikes the upper die 1. The struck upper die 1 moves vertically downward and strikes the blank. At this time, the blank is extruded by the first arc-shaped groove and the second arc-shaped groove 3 of the upper die 1 and the lower die 4 and thus deforms into a curved surface that fits the first arc-shaped groove and the second arc-shaped groove 3 of the upper die 1 and the lower die 4. During the process of the upper die 1 moving downward and striking the blank, the four spring steels 2 absorb part of the impact force received by the upper die 1 under their elastic action and are in a compressed state. When the hammer head finishes hammering and moves upward, the four spring steels 2 drive the upper die 1 to move upward and return to the initial state under their elastic action. At this time, one hammering of the blank is completed. Then the worker uses tools to clamp the blank and rotate it by an angle for the next hammering until it is forged into a circular blank.

Claims

1. A round billet forging die, characterized in that: The mold assembly comprises a mold component and a buffer element, wherein the mold component comprises an upper mold and a lower mold of two identical shapes and sizes, and is used to extrude and deform a blank into a circular blank; The buffer element is detachably connected to the upper die and the lower die. The buffer element is used to make the working surfaces of the upper die and the lower die face each other and leave a distance between the upper die and the lower die. When the hammer head of the forging machine contacts the upper die, the buffer element allows the upper die to move vertically downward and absorb part of the impact of the hammer head to form a buffer, so as to avoid the impact force of the push head being directly transmitted to the base to form a hard contact after the upper die and the lower die contact. When the hammer head moves upward after hammering, the buffer element restores the upper die to its initial state through elasticity.

2. A round billet forging die according to claim 1, characterized in that: The lower die is in the shape of a rectangular block, and an arc-shaped groove 1 for extruding the blank into an arc-shaped curved surface is provided at the center of the upper surface of the lower die.

3. A round billet forging die according to claim 2, characterized in that: The upper die is in the shape of a rectangular block, and an arc groove 2 for extruding the blank into an arc-shaped curved surface is provided at the center of the lower surface of the upper die.

4. A round billet forging die according to claim 3, characterized in that: The buffer element includes four "U"-shaped spring steels, which are mirror-mounted at both ends of the mold assembly in a group of two, and the two spring steels in each group are respectively arranged on the front and rear sides of the same end of the mold assembly; and one end of the spring steel is detachably connected to the upper mold, and the other end is detachably connected to the lower mold.

5. A round billet forging die according to claim 4, characterized in that: The two spring steels in the same group are detachably connected with a connecting rod at their bending positions.

6. A round billet forging die according to claim 5, characterized in that: Both ends of the upper mold are respectively provided with transverse through holes, and both ends of the lower mold are also respectively provided with transverse through holes. Both ends of each spring steel are fixedly connected with a pin shaft for inserting into the through hole.

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