CN214720255U - Mould structure suitable for forging burr prevention - Google Patents

Abstract

The utility model discloses a mould structure suitable for forging burr prevention belongs to the mould field. The utility model comprises an upper die and a lower die inner core; an upper die pressing ring is arranged on the periphery of the upper die; a lower die fixing ring is arranged on the periphery of the lower die inner core; the upper end of the lower die fixing ring is provided with a lower die pressing ring, a rectangular spring is arranged in the lower die fixing ring, and a lower die insert is arranged on the rectangular spring; the lower die pressing ring tightly presses the lower die insert through the bolt, at the moment, the rectangular spring is in a compressed state, and no gap exists between the lower die insert and the lower die fixing ring; when the die is closed, the upper die pressing ring is positioned on the lower die insert. The utility model discloses a mould structure suitable for forging burr prevention, mould structure are floating, have changed the direction of metal friction force, become the power that difficult filling department with frictional resistance, and decurrent frictional force has hindered the ascending trend of metal to can effectively avoid the formation of burr.

Description

Mould structure suitable for forging burr prevention

Technical Field

The utility model belongs to the mould field, especially, a mould structure suitable for forging burr prevention.

Background

Closed forging has the shaping stably, and material utilization is high advantage, and in recent years along with the forged popularization of closed, new problem also appears thereupon. When the forging blank is vertically assembled, part of metal is generated at the assembly gap to form burrs. When machining, the burrs affect the machining positioning, so that before machining, a blank needs to be subjected to a deburring process. This procedure is time consuming and labor intensive. The burrs are completely eliminated under the influence of blank temperature, blanking precision, die structure precision, design structure and operators, and the cost is high.

In the use of fixed mould structure, go up the mould and receive inertial influence in the blank forming process, it is full of the nature better than the lower mould, at the forging in-process, go up the mould and easily appear the burr, the lower mould is difficult for being full of.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the shortcoming that the forged forging of closed easily formed the burr, provide a mould structure suitable for forging burr prevention.

In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:

a mold structure suitable for preventing burrs of a forge piece comprises an upper mold core and a lower mold core;

an upper die pressing ring is arranged on the periphery of the upper die; a lower die fixing ring is arranged on the periphery of the lower die inner core;

the upper end of the lower die fixing ring is provided with a lower die pressing ring, a rectangular spring is arranged in the lower die fixing ring, and a lower die insert is arranged on the rectangular spring;

the lower die pressing ring tightly presses the lower die insert through the bolt, at the moment, the rectangular spring is in a compressed state, and no gap exists between the lower die insert and the lower die fixing ring;

when the die is closed, the upper die pressing ring is positioned on the lower die insert.

Furthermore, an upper die transition die holder is arranged at the upper ends of the upper die and the upper die pressing ring.

Further, the lower ends of the lower die inner core and the lower die fixing ring are provided with lower die transition die holders.

Further, the number of the rectangular springs is 8, and the 8 uniformly distributed rectangular springs are arranged in the circumferential direction of the lower die fixing ring.

Further, the compression amount of the rectangular spring is 2 mm.

Further, the floating amount of the rectangular spring in one forging stroke is 4 mm.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses a mould structure suitable for forging burr prevention, mould structure are floating, have changed the direction of metal friction force, become the power that difficult filling department with frictional resistance, and decurrent frictional force has hindered the ascending trend of metal to the formation of burr has effectively been avoided. The utility model discloses a mould structure changes the elastic connection of soft landing into by original rigid connection, has optimized the flow direction of blank, has reduced mould structure's whole atress, has improved mould structure's life by a wide margin, has promoted the whole outward appearance of forging.

Drawings

Fig. 1 is a structural diagram of the present invention.

Wherein: 1-upper die transition die holder; 2-upper mould; 3-pressing a ring on the die; 4-pressing a ring by a lower die; 5-a lower die insert; 6-rectangular spring; 7-lower die fixing ring; 8-lower die inner core; 9-lower die transition die holder.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The present invention will be described in further detail with reference to the accompanying drawings:

referring to fig. 1, fig. 1 is a structural diagram of the present invention, a mold structure suitable for forging burr prevention, comprising an upper mold 2 and a lower mold core 8; an upper die pressing ring 3 is arranged on the periphery of the upper die 2; a lower die fixing ring 7 is arranged on the periphery of the lower die inner core 8; the upper end of the lower die fixing ring 7 is provided with a lower die pressing ring 4, a rectangular spring 6 is arranged in the lower die fixing ring 7, and a lower die insert 5 is arranged on the rectangular spring 6; the lower die pressing ring 4 tightly presses the lower die insert 5 through a bolt, at the moment, the rectangular spring 6 is in a compressed state, and no gap exists between the lower die insert 5 and the lower die fixing ring 7; when the die is closed, the upper die pressing ring 3 is positioned on the lower die insert 5; the upper ends of the upper die 2 and the upper die pressing ring 3 are provided with an upper die transition die holder 1; the lower ends of the lower die inner core 8 and the lower die fixing ring 7 are provided with a lower die transition die holder 9; the number of the rectangular springs 6 is 8, and the 8 rectangular springs 6 are uniformly distributed in the circumferential direction of the lower die fixing ring 7. Specifically, the left side view of fig. 1 is when the floating starts, and the right side view is when the floating ends. The upper die fixing mode is that the upper die pressing ring 3 fixes the upper die 2 and tightly presses the upper die by using a bolt. The lower die fixing mode is that a lower die fixing ring 7 positions a lower die inner core 8, a lower die insert 5 is tightly pressed by a lower die pressing ring 4, rectangular springs 6 are installed in the lower die fixing ring 7, and 8 rectangular springs 6 are uniformly distributed in the circumferential direction. The lower die insert 5 floats upwards on the lower die fixing ring 7 through the rectangular spring 6, the lower die insert 5 is tightly pressed by the lower die pressing ring 4 through the bolt until the lower die insert 5 and the lower die fixing ring 7 have no gap, and the spring is pre-pressed for 2mm at the moment. When the equipment runs and the upper die pressing ring 3 contacts the lower die insert 5, the lower die insert 5 and the upper die 2 are in a floating type when the upper die pressing ring and the lower die insert move downwards. When the lower die clamping ring 4 moves downwards by 4mm, the rectangular spring 6 compresses by 4mm again, and when the return stroke moves upwards, the lower die insert 5 returns to the starting position again due to the rebound of the rectangular spring 6. The upper die 2 continues to move upwards to finish a floating forging process. The floating amount of the mold structure is 4 mm. The floating amount can be adjusted appropriately according to the equipment.

Through right the utility model discloses a mould structure suitable for forging burr prevention verifies, and mould structure has decurrent strength, hinders the formation of forging burr, has eliminated the forging burr. Meanwhile, the hitting force of the device is reduced, the loss of the forging device is reduced, and the service life of the die structure is obviously prolonged. On the other hand, the fullness of the lower die of the difficult-to-forge piece is also improved, and the forge piece waste is reduced.

The utility model discloses a working method:

1) fixing the upper die 2 by using the upper die pressing ring 3 and pressing by using a bolt;

2) positioning a lower die inner core 8 by using a lower die fixing ring 7, pressing a lower die insert 5 by using a lower die pressing ring 4, and installing rectangular springs 6 in the lower die fixing ring 7, wherein the 8 rectangular springs 6 are uniformly distributed in the circumferential direction;

3) the lower die insert 5 floats upwards on the lower die fixing ring 7 through the rectangular spring 6, the lower die pressing ring 4 tightly presses the lower die insert 5 through the bolt until no gap exists between the lower die insert 5 and the lower die fixing ring 8, and the spring is pre-pressed for 2 mm;

4) when the equipment runs and the upper die pressing ring 3 contacts the lower die insert 5, the lower die insert 5 and the upper die 2 move downwards simultaneously, and in the process, the lower die insert 5 and the upper die 2 are floating;

5) when the lower die pressing ring 4 moves downwards for 4mm, the rectangular spring 6 compresses for 4mm again;

when the return stroke moves upward, the lower die insert 5 returns to the start position due to the rebound of the rectangular spring 6;

6) the upper die 2 continues to move upwards to finish a floating forging process.

The floating die structure can prevent the generation of forging burrs. During the deburring of the blank, it is also the time when the forging process is about to end. At the moment, the upper die pressing ring pushes the lower die insert to move downwards together, and the downward friction force hinders the upward trend of metal, so that the formation of burrs can be effectively avoided. The blank is visualized, the sharp corner of the lower die is filled fully, and the conventional burr outlet part of the upper die is about an R1-R2 round corner. But whether the lower die can not be burred or not can be accurately controlled, and the sharp corner of the upper die just controls the fillet within the range required by the drawing, so that the design floating amount has a direct relation. The floating amount is too large, burrs are produced on the lower die, and the upper surface of the lower die is not full and does not meet the requirements of drawings. The floating amount is too small to meet the expected burr-free requirement, and the blank still needs to be added with a burr removing procedure, so that the appearance quality of the forged piece is influenced, and the product cost is increased. The design value of the floating amount is critical. Therefore, data are collected through field verification, the numerical value of the floating quantity is determined, the floating quantity is reasonable, and burrs can be effectively prevented from being formed.

The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.

Claims (6)

1. A die structure suitable for preventing burrs of a forge piece is characterized by comprising an upper die (2) and a lower die inner core (8);

an upper die pressing ring (3) is arranged on the periphery of the upper die (2); a lower die fixing ring (7) is arranged on the periphery of the lower die inner core (8);

a lower die pressing ring (4) is arranged at the upper end of the lower die fixing ring (7), a rectangular spring (6) is arranged in the lower die fixing ring (7), and a lower die insert (5) is arranged on the rectangular spring (6);

the lower die pressing ring (4) tightly presses the lower die insert (5) through a bolt, at the moment, the rectangular spring (6) is in a compressed state, and no gap exists between the lower die insert (5) and the lower die fixing ring (7);

when the die is closed, the upper die pressing ring (3) is positioned on the lower die insert (5).

2. The die structure suitable for forging burr prevention according to claim 1, characterized in that the upper ends of the upper die (2) and the upper die pressing ring (3) are provided with an upper die transition die holder (1).

3. The die structure suitable for forging burr prevention according to claim 1, characterized in that lower die transition die holders (9) are provided at lower ends of the lower die inner core (8) and the lower die fixing ring (7).

4. The die structure suitable for forging burr prevention according to claim 1, characterized in that the number of the rectangular springs (6) is 8, and the 8 rectangular springs (6) are uniformly distributed in the circumferential direction of the lower die fixing ring (7).

5. The die structure suitable for forging deburring according to claim 1, wherein the compression amount of the rectangular spring (6) is 2 mm.

6. The die structure suitable for forging burr prevention according to claim 1, characterized in that the floating amount of the rectangular spring (6) is 4mm in one forging stroke.

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