阅读说明：本技术 一种新型球形串珠金属件制造方法 (Manufacturing method of novel spherical bead metal piece ) 是由 梁东 于 2019-07-31 设计创作，主要内容包括：本发明公开了一种新型空心球形串珠金属件制造方法,包括如下步骤：模具型腔夹片打开,上下模合模保压,设备左右两侧水平油缸第一段推进推合模具左右封头把坯管密封,充液让坯管预充第一段的初次液体内压,机器左右两侧水平油缸二段推进把模具型腔各球体模片推合,压缩坯管在管内液压的作用下拉动原材料往球体圆周流动实现体积胀大变型,二次充液使高压把管件胀贴模腔间隙,管内液体泄压,左右两侧水平油缸退回打开左右封头,上下模打开,拿出产品。通过新的液胀成形理念及液胀设备、模具的改进,把此球形串珠金属件实现一次性液胀成型；成品率高；对原材料要求低,节省材料成本；简化生产工序,节省生产成本。(The invention discloses a manufacturing method of a novel hollow spherical bead metal piece, which comprises the following steps: the clamping piece of the die cavity is opened, the upper die and the lower die are closed for pressure maintaining, the first section of the horizontal oil cylinders on the left side and the right side of the equipment push the left end enclosure and the right end enclosure of the push die to seal the blank pipe, the filling liquid enables the blank pipe to be pre-filled with primary liquid internal pressure of the first section, the second section of the horizontal oil cylinders on the left side and the right side of the machine pushes each sphere mold piece of the die cavity of the die, the compressed blank pipe pulls raw materials to flow towards the periphery of the sphere under the action of the hydraulic pressure in the pipe to realize volume expansion deformation, the secondary filling liquid enables the high pressure to expand the pipe fitting to. The spherical bead metal piece is subjected to one-time liquid expansion forming through a new liquid expansion forming principle and improvement of liquid expansion equipment and a die; the yield is high; the requirement on raw materials is low, and the material cost is saved; the production process is simplified, and the production cost is saved.)

1. The manufacturing method of the novel hollow spherical beaded metal part is characterized by comprising the following steps:

s1, opening the clamping piece of the die cavity, closing the upper die and the lower die, maintaining pressure, pushing the first section of the horizontal oil cylinders at the left side and the right side of the equipment to push the left sealing head and the right sealing head of the push die to seal the blank pipe;

s2, filling liquid to pre-fill the blank pipe with the primary liquid internal pressure of the first section, and pushing the two sections of horizontal oil cylinders on the left and right sides of the machine to push the sphere mold sheets of the mold cavity;

s3, the compressed blank pipe pulls the raw material to flow towards the circumference of the sphere under the action of hydraulic pressure in the pipe to realize volume expansion deformation, secondary liquid filling enables high pressure to expand the pipe fitting to a die cavity gap, liquid in the pipe is decompressed, horizontal oil cylinders on the left side and the right side retract to open the left sealing head and the right sealing head, the upper die and the lower die are opened, and a product is taken out.

2. The manufacturing method of the novel hollow spherical beaded metal piece according to claim 1, characterized in that: the die cavity is of a split piece type, and the central surface of the spherical beaded metal piece is used as a splitting surface to manufacture the die cavity into an openable clip piece type structure.

3. The manufacturing method of the novel hollow spherical beaded metal piece according to claim 1, characterized in that: the die consists of an upper die plate (1) and a lower die plate (2), die cavity clamping pieces (3) are arranged in the upper die plate (1) and the lower die plate (2), and the die cavities of the die cavity clamping pieces (3) are combined to form a complete integral die cavity (4) of the spherical beaded metallic piece.

4. The manufacturing method of the novel hollow spherical beaded metal piece according to claim 3, characterized in that: the die cavity clamping pieces (3) on the upper die plate (1) and the lower die plate (2) are provided with five pieces.

Technical Field

The invention belongs to the field of manufacturing of hollow spherical beaded metal parts, and particularly relates to a novel manufacturing method of a hollow spherical beaded metal part.

Background

The spherical beaded metal piece (as shown in fig. 3) is characterized in that the ratio of the maximum part diameter to the minimum part diameter is large (the bulging ratio is up to 1.9 times), and far exceeds the normal bulging ratio of one-time bulging of the material (the normal rated bulging ratio of the material is 1.25 to 1.45 times).

The traditional forming process of the spherical beaded metal piece comprises the following steps:

a straight round tube with the diameter equal to the diameter of the maximum part of the product is used as a blank, and a tube-drawing machine is used for one-time or two-time rolling and diameter-reducing forming.

The disadvantages of this process are: 1. the requirement on raw materials is high (a billet tube before rolling needs annealing and welding lines are scraped in the interior), the material cost is high by 2, and the product rolled at one time is easy to crack and has high rejection rate because the size and diameter ratio of the product far exceed the forming limit of the material; the rejection rate can be reduced by rolling twice, but an annealing procedure is required before the rolling for the second time, and the production cost is high.

A straight round tube with the diameter equal to the diameter of the minimum part of a product is used as a blank, the traditional liquid expansion process is adopted according to the rated expansion proportion of the material, the blank is gradually expanded and formed for 3 times, and the workpiece needs to be annealed before the expansion for the 2 nd and 3 rd times.

The disadvantages of this process are: the production process is multiple, the bulging and the annealing are carried out for 3 times, 5 processes are needed in total, and the processing cost of the processes is too high.

Disclosure of Invention

The invention aims to provide a novel method for manufacturing a hollow spherical bead metal piece, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a manufacturing method of a novel hollow spherical bead metal piece comprises the following steps:

s1, opening the clamping piece of the die cavity, closing the upper die and the lower die, maintaining pressure, pushing the first section of the horizontal oil cylinders at the left side and the right side of the equipment to push the left sealing head and the right sealing head of the push die to seal the blank pipe;

s2, filling liquid to pre-fill the blank pipe with the primary liquid internal pressure of the first section, and pushing the two sections of horizontal oil cylinders on the left and right sides of the machine to push the sphere mold sheets of the mold cavity;

s3, the compressed blank pipe pulls the raw material to flow towards the circumference of the sphere under the action of hydraulic pressure in the pipe to realize volume expansion deformation, secondary liquid filling enables high pressure to expand the pipe fitting to a die cavity gap, liquid in the pipe is decompressed, horizontal oil cylinders on the left side and the right side retract to open the left sealing head and the right sealing head, the upper die and the lower die are opened, and a product is taken out.

Preferably, the die cavity is of a split type, and the central surface of the spherical beaded metal piece is used as a splitting surface to manufacture the die cavity into an openable and closable clip type structure.

Preferably, the die consists of an upper die plate and a lower die plate, die cavity clamping pieces are arranged in the upper die plate and the lower die plate, and the die cavities of the die cavity clamping pieces are combined to form a complete integral die cavity of the spherical beaded metal piece.

Preferably, the die cavity clamping pieces on the upper die plate and the lower die plate are provided with five pieces.

Compared with the prior art, the invention has the beneficial effects that: the hollow spherical bead metal piece is subjected to one-time liquid expansion forming through a new liquid expansion forming principle and improvement of liquid expansion equipment and a die; the yield is high; the requirement on raw materials is low, and the material cost is saved; the production process is simplified, and the production cost is saved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of an upper or lower template of the present invention;

fig. 3 is a schematic structural view of a spherical beaded metallic member.

In the figure: 1. mounting a template; 2. a lower template; 3. a mold cavity clamping piece; 4. a monolithic mold cavity.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

A manufacturing method of a novel hollow spherical bead metal piece comprises the following steps:

s1, opening the clamping piece of the die cavity, closing the upper die and the lower die, maintaining pressure, pushing the first section of the horizontal oil cylinders at the left side and the right side of the equipment to push the left sealing head and the right sealing head of the push die to seal the blank pipe;

s2, filling liquid to pre-fill the blank pipe with the primary liquid internal pressure of the first section, and pushing the two sections of horizontal oil cylinders on the left and right sides of the machine to push the sphere mold sheets of the mold cavity;

s3, the compressed blank pipe pulls the raw material to flow towards the circumference of the sphere under the action of hydraulic pressure in the pipe to realize volume expansion deformation, secondary liquid filling enables high pressure to expand the pipe fitting to a die cavity gap, liquid in the pipe is decompressed, horizontal oil cylinders on the left side and the right side retract to open the left sealing head and the right sealing head, the upper die and the lower die are opened, and a product is taken out.

Specifically, the die cavity is of a split type, and the central surface of the spherical beaded metal piece is used as a splitting surface to manufacture the die cavity into an openable and closable clip type structure.

Specifically, the die comprises an upper die plate 1 and a lower die plate 2, die cavity clamping pieces 3 are arranged in the upper die plate 1 and the lower die plate 2, and the die cavities of the die cavity clamping pieces 3 are combined to form a complete whole die cavity 4 of the spherical beaded metal piece.

Specifically, five mold cavity clamping pieces 3 on the upper template 1 and the lower template 2 are arranged.

The scheme adopts a straight round tube with the diameter equal to the diameter of the minimum position of a product as a blank, adopts the forming method of the process, and adopts liquid expansion equipment and a die to carry out one-time liquid expansion forming.

The idea of the scheme is to fill materials into the ball body part in the expansion process so as to increase the normal expansion ratio of the materials, thereby realizing one-time super-proportional liquid expansion molding. The process implementation method comprises the following steps: the integral die cavity is changed into a split piece type, the spherical central surface is used as a splitting surface to make the die cavity into an openable clip piece type structure, and one-time liquid expansion forming is realized through an improved expansion process step flow. The principle is as follows: the clamping piece of the mold cavity of the mold before expansion is opened for a certain distance, the spherical mold cavity is elongated, namely the length of a blank pipe placed in the mold cavity is longer than the length between product spheres, so that the volume of the blank pipe in the sphere mold cavity is increased, liquid with certain pressure is pre-charged to the blank pipe during liquid expansion, the clamping piece of the mold cavity is pushed into the whole mold cavity in the shape of a product through horizontal oil cylinders on the left side and the right side of the equipment, the blank pipe of the spherical cavity section is subjected to isometric expansion deformation in the pushing process of the clamping piece of the mold cavity until the size (the length is reduced and the diameter is increased) of the mold cavity is almost reached, the wall thinning amount is very small in the expansion process through filling of raw materials, the expansion performance of the blank pipe is small in the volume expansion process, and the expansion proportion of the whole forming.

The spherical bead metal piece is subjected to one-time liquid expansion forming through a new liquid expansion forming principle and improvement of liquid expansion equipment and a die; the yield is high; the requirement on raw materials is low (the expansion type blank pipe adopts a welded pipe, annealing is not needed, and an internal scraping welding seam is not needed), so that the material cost is saved; the production process is simplified, and the production cost is saved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.