CN219683848U - Gear shaft roll forming die - Google Patents

Abstract

The utility model relates to the technical field of forging die design, and discloses a gear shaft roll forming die which comprises an upper anvil and a lower anvil, wherein an upper roll forming card is movably connected to the bottom of the upper anvil, a lower roll forming card is fixedly arranged at the top of the lower anvil, gear shaft blanks are arranged in the upper roll forming card and the lower roll forming card, and the center heights of the gear shaft blanks are the same as those of the upper roll forming card and the lower roll forming card. According to the gear shaft roll forming die, on the basis of free forging anvil drawing, the roll forming clamp with the same center as the material is adopted for drawing, so that the center of a blank is self-adjusted in the turning process, a bending operation rod is combined with the material with higher strength, certain elastic tension is realized, the upper roll forming clamp and the lower roll forming clamp connected with the operation rod are realized, automatic opening and closing actions are realized between the blank rotary feeding room and the hammer hammering beat room, and the final forming of a product is guaranteed to have higher precision and higher production efficiency.

Description

Gear shaft roll forming die

Technical Field

The utility model relates to the technical field of forging die design, in particular to a gear shaft roll forming die.

Background

Forging is a processing method for obtaining a forging piece with certain mechanical properties, a certain shape and a certain size by applying pressure to a metal blank by using forging machinery to make the metal blank plastically deform. Drawing refers to a forging process with a reduced cross-sectional area and an increased length, while drawing is the primary forging process that determines the quality of the forging. The purpose of the drawing is that: the forging ratio can be improved by combining the procedures of repeated drawing and upsetting, carbide in alloy steel is crushed, and the mechanical property of the material can be improved.

Since the blank needs to be compressed and deformed by successive feeding and repeated rotation during drawing, drawing is a process that consumes a large number of man-hours in forging production. In the existing drawing process, a blank with an initial size is generally drawn to a first intermediate size between the initial size and a target size, then the blank is drawn to a second intermediate size between the first intermediate size and the target size, the intermediate forging with the target size is obtained through multiple drawing, and then the intermediate forging is rounded by chamfering to obtain the target forging, so that drawing efficiency is low.

For gear shaft products, the length of the shaft part is large, the diameter of the disk surface of the tooth part is large, the volume of the forged piece is more than 70%, and a large material specification is required to be adopted for free forging and drawing preforming process, and then the forging is carried out for upsetting. When the shaft part is drawn, the drawing step part is easy to be eccentric due to the large specification of the adopted material and the flat anvil drawing, so that the metal flows seriously to one side when the die forging is carried out. In the drawing process, the eccentric step is caused due to the influence of the factors such as uneven heating, uneven hammering and material dividing, and the like, so that the accuracy of the shaft blank obtained by drawing is low.

Disclosure of Invention

(one) solving the technical problems

Aiming at the defects of the prior art, the utility model provides a gear shaft rolling forming die which has the advantages of high forming precision, high qualification rate, high production efficiency and the like, and solves the problems that the dimension precision of a gear shaft blank obtained when a gear shaft product with a large section variation is freely forged and pulled is not high, the qualification rate of a gear shaft forging is low, and high production efficiency cannot be realized.

(II) technical scheme

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a gear shaft roll forming mould, includes upper anvil and lower anvil, upper anvil's bottom swing joint has last roll forming card, lower anvil's top fixed mounting has lower roll forming card, the inside of going up roll forming card and lower roll forming card is equipped with gear shaft embryo material.

Preferably, the gear shaft blank has the same central height as the upper roll forming clamp and the lower roll forming clamp, and the roll forming clamp with the same central height as the material is adopted for drawing on the basis of drawing by utilizing the free forging anvil, so that the blank can self-adjust the center in the process of turning the head, and finally, a more accurate shaft blank can be obtained.

Preferably, the gear shaft blank is rotationally connected with the interiors of the upper roll forming card and the lower roll forming card, the shaft part which is drawn in advance enters the roll forming card to be sealed and formed, then the shaft part is turned over ninety degrees and enters the card again, and the shaft part is drawn out accurately and rolled by repeated operation.

Preferably, the left side of going up roll forming card and lower roll forming card fixed mounting has crooked action bars, and crooked action bars adopts higher intensity material, realizes certain elastic tension, makes the upper and lower roll forming card of action bars connection, realizes the action of automatic one-piece opening and one-piece between rotatory pay-off of blank and hammer hammering beat, guarantees the higher precision and the higher production efficiency of final fashioned of product.

Compared with the prior art, the utility model provides a gear shaft roll forming die, which has the following beneficial effects:

1. according to the gear shaft roll forming die, on the basis of free forging anvil drawing, the roll forming clamp with the same center as the material is adopted for drawing, so that the center of a blank can be automatically adjusted in the turning process, a more accurate shaft blank can be finally obtained, a material with higher strength is adopted by combining a bending operation rod, certain elastic tension is realized, the upper and lower roll forming clamps connected with the operation rod are realized, automatic opening and closing actions are realized between a blank rotary feeding room and a hammer hammering beat room, and the final forming precision and the production efficiency of a product are guaranteed.

2. The gear shaft rolling forming die is characterized in that a shaft part which is pre-drawn enters a rolling clamp for sealing forming, then is turned over for ninety degrees and enters the clamp, repeated operation is carried out to realize accurate drawing and rounding of the shaft part, shaft blanks are fed while being formed in a rotating mode, finally, accurate forming of the whole shaft part is realized, after a hammer head leaves the rolling clamp, the rolling clamp is elastically opened, a blank is turned over for ninety degrees and fed into the clamp, the hammer head is pressed down, the rolling clamp is combined, the blank is pressed and formed, and an upper die and a lower die are arranged in the sealing clamp die, so that the higher precision requirement of final forming of a product is realized.

Drawings

FIG. 1 is a schematic view of a spring-open structure of a rolling card according to the present utility model;

FIG. 2 is a schematic view of a rolling snap-fit combination structure according to the present utility model;

fig. 3 is a side view of the structure of the rolling forming die for the gear shaft of the utility model.

Wherein: 1. an upper anvil; 2. a lower anvil; 3. rolling and forming the card; 4. a lower roll forming card; 5. gear shaft blanks; 6. bending the operating lever.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, a gear shaft roll forming die is disclosed, which is characterized in that on the basis of drawing by using a free forging anvil, a roll forming clamp with the same center as the material is adopted to draw, thus the blank is self-adjusted to the center in the process of turning, a more accurate shaft blank can be finally obtained, a material with higher strength is combined with a bending operation rod to realize certain elastic tension, the upper and lower roll forming clamps connected with the operation rod are automatically opened and closed in a blank rotating feeding room and a hammer beat room, the higher precision and higher production efficiency of final product forming are ensured, the gear shaft roll forming die comprises an upper anvil 1 and a lower anvil 2, the bottom of the upper anvil 1 is movably connected with an upper roll forming clamp 3, the top of the lower anvil 2 is fixedly provided with a lower roll forming clamp 4, the left sides of the upper roll forming clamp 3 and the lower roll forming clamp 4 are fixedly provided with a bending operation rod 6, the inside of the upper roll forming clamp 3 and the lower roll forming clamp 4 is provided with a gear shaft blank 5, the center heights of the gear shaft blank 5 and the upper roll forming clamp 3 and the lower roll forming clamp 4 are the same, the gear shaft blank 5 is rotationally connected with the inside of the upper roll forming clamp 3 and the inside of the lower roll forming clamp 4, the shaft part which is pre-drawn enters the roll forming clamp for sealing forming, then is turned over ninety degrees and enters the clamp again, accurate drawing and rounding of the shaft part are realized through repeated operation, the shaft blank is fed while rotating forming, finally, the accurate forming of the whole shaft part is realized, the roll forming clamp is elastically opened after a hammer head leaves the roll forming clamp, the blank is turned over ninety degrees and fed into the clamp, the hammer head is pressed down, the roll forming clamp is combined, the blank is pressed and formed, and the upper die and the lower die are in the sealed clamping die, so that the higher precision requirement of final forming of the product is realized.

When the die is used, the shaft part which is pre-drawn enters the rolling clamp for sealing and forming, then is turned over for ninety degrees and enters the clamp, the shaft part is precisely drawn and rolled by repeated operation, the shaft blank is fed while being rotationally formed, the whole shaft part is finally precisely formed, the rolling clamp is elastically opened after the hammer head leaves the rolling clamp, the blank is turned over for ninety degrees and fed into the clamp, the hammer head is pressed down, the rolling clamp is combined, the blank is pressed and formed, and the upper die and the lower die are arranged in the sealed clamp die, so that the higher precision requirement of final forming of a product is realized. According to the gear shaft roll forming die, on the basis of free forging anvil drawing, the roll forming clamp with the same center as the material is adopted for drawing, so that the center of a blank can be automatically adjusted in the turning process, a more accurate shaft blank can be finally obtained, a material with higher strength is adopted by combining a bending operation rod, certain elastic tension is realized, the upper and lower roll forming clamps connected with the operation rod are realized, automatic opening and closing actions are realized between a blank rotary feeding room and a hammer hammering beat room, and the final forming precision and the production efficiency of a product are guaranteed.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (4)

1. The utility model provides a gear shaft roll forming mould, includes upper anvil (1) and lower anvil (2), its characterized in that: the bottom swing joint of upper anvil (1) has last roll forming card (3), the top fixed mounting of lower anvil (2) has lower roll forming card (4), the inside of going up roll forming card (3) and lower roll forming card (4) is equipped with gear shaft embryo material (5).

2. The gear shaft roll forming die as claimed in claim 1, wherein: the gear shaft blank (5) is the same as the centers of the upper roll forming clamp (3) and the lower roll forming clamp (4).

3. The gear shaft roll forming die as claimed in claim 1, wherein: the gear shaft blank (5) is rotationally connected with the interiors of the upper roll forming clamp (3) and the lower roll forming clamp (4).

4. The gear shaft roll forming die as claimed in claim 1, wherein: the left sides of the upper roll-forming card (3) and the lower roll-forming card (4) are fixedly provided with a bending operation rod (6).