CN210358583U

CN210358583U - Continuous cold press molding roller die for conical tube

Info

Publication number: CN210358583U
Application number: CN201921273925.8U
Authority: CN
Inventors: 周爱民
Original assignee: Hangzhou Chuntong New Material Technology Co ltd
Current assignee: Hangzhou Chuntong New Material Technology Co ltd
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-04-21
Anticipated expiration: 2029-08-07

Abstract

The utility model discloses a toper pipe cold press forming roller mould in succession, including the roller mould body that a pair of structure is the same, the excircle is tangent to be arranged, two roller mould body cooperations back form the effective cold pressing district of a whole circle die orifice at tangent point, and along with the reverse synchronous rotation of a pair of roller mould body, the whole circle die orifice diameter of formation increases gradually or reduces. The utility model has the advantages of can be used to the shaping of various size toper pipes in theory, the range of application is wide, roller mould long service life, the cost of follow-up maintenance and maintenance is little to the toper pipe that produces is seamless, continuous and the wall thickness is even.

Description

Continuous cold press molding roller die for conical tube

Technical Field

The utility model relates to a forming die of seamless taper pipe, especially a continuous cold press forming roller mould of conical tube.

Background

The tapered pipe is a tapered pipe which is obtained by processing a round pipe serving as a prototype through special equipment and technology, the main raw material is carbon steel, and various materials such as stainless steel, alloy steel and the like can be used to obtain tapered pipes with different performances. The forming of conical tube usually adopts hot-push forming and cold-press forming, because hot-push forming technology can cause irreversible internal part substructure change to the processing material for the conical tube that processing obtained loses the performance of material itself, consequently, to the conical tube that material performance required height generally adopt the mode of colding pressing shaping, and the forming technology of coldpress forming is also replacing hot-push gradually in the market.

Patent publication No. CN 104550287A, a cold extrusion forming die of conical duct, the mould that adopts is the combined type mould of die and terrace die, and the conical duct is through extrusion, specifically puts into the die with the pipe earlier, starts the press, makes the terrace die end aim at the terminal surface of pipe, only slowly applys axial pressure to the pipe blank, and the pipe is just by extrusion forming for the conical duct in the die cavity. The mode of extrusion forming by matching the female die and the male die has high requirements on the die, the finally produced conical tube has low quality, the conical tube is easy to deform by extrusion in the production process of the female die, the conical tube produced when the deformation amount is small has no visible defects, but the precision in use can still be influenced, and the female die even has the possibility of breakage along with the increase of the deformation amount; for the male die, because the male die is in a strip-shaped structure, the original straightness of the male die is gradually increased by the extrusion force of the female die and the material received in use, and the forming precision of the conical tube is gradually reduced along with the increase of the deformation quantity.

The biggest defect of the mode of extrusion in above-mentioned patent is that the taper pipe wall thickness that makes is difficult to guarantee that the homogeneity is stable, and when the great or less taper pipe of production size, the manufacturing degree of difficulty of mould is big moreover, and life is short, and the mould just needs to its whole change in case the problem appears, and follow-up maintenance is great with the expense that changes the needs, and the extrusion also needs huge drive power simultaneously, and the manpower and materials cost that consumes is all great.

Therefore, the existing mold and method for forming tapered tubes have the problems of narrow application range, easy damage to the mold, high cost for subsequent maintenance and replacement, and uneven wall thickness of the tapered tubes, and a new mold is needed for producing tapered tubes.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a toper pipe is cold press forming roller mould in succession. The method has the advantages of theoretically being applicable to forming of conical pipes with various sizes, wide application range, long service life of the roller die and low cost of subsequent maintenance, and the conical pipes produced are seamless, continuous and uniform in wall thickness.

The technical scheme of the utility model: the utility model provides a conical duct is cold press forming roller mould in succession, includes the roller mould body that a pair of structure is the same, the tangent arrangement of excircle, forms the effective cold nip of a whole circle die orifice at tangent point after two roller mould bodies cooperate, and along with the reverse synchronous revolution of a pair of roller mould body, the whole circle die orifice diameter of formation increases gradually or reduces.

In the roller die for continuous cold press molding of the conical tube, the single roller die body is a cylinder, an effective working part of the single roller die body in an effective cold press area is arranged in a cylindrical surface of the cylinder, the effective working part is a circle of groove, and the groove comprises an arc-shaped effective molding groove.

In the conical tube continuous cold press forming roller die, the length of the effective forming groove is 1/2-3/4 corresponding to the circumference of the groove.

In the roller die for continuously cold-pressing and forming the conical tube, the effective forming grooves in the grooves and the non-effective areas are transited by smooth curved surfaces.

In the roller die for continuous cold press molding of the conical tube, the center of the roller die body is provided with the shaft hole.

Compared with the prior art, the roller die comprises a pair of roller die bodies which have the same structure and are tangentially arranged on the outer circle, the size of the roller die body is determined by the size of the conical pipe to be produced, and by adopting a plurality of groups of roller die bodies, the roller die bodies can produce the non-lap-seam conical pipes with various sizes and lengths, and the application range is wide; specifically, the utility model discloses two roller die body cooperate the back at tangent point formation one whole circle die orifice's effective cold nip, and along with a pair of roller die body's reverse synchronous revolution, the whole circle die orifice diameter crescent or the reduction of formation, also promptly the utility model discloses a tapered tube is produced to the mode through roll forming, and the effective cold nip of every whole circle die orifice all corresponds a cross-section to the tapered tube, realizes tapered tube bore by big-to-little processing along with the change of whole circle die orifice diameter, compares in conventional extrusion's technique the utility model discloses the tapered tube of production does not have lap joint and wall thickness homogeneous, and the quality is higher.

The utility model discloses only be a pair of roller die body, theoretically producible be one section of toper pipe on axial length, and through many right the roller die body (every to all through the design on the size, have different sizes), can produce the tapered tube that does not have the lap joint of various size, various length, compare in the conventional extrusion die with the mode of cooperation of terrace die (the quality problems appear and need whole change), the utility model discloses the mould only needs to change the single roller die body that goes wrong when the problem on appearing the quality for the expense of follow-up maintenance and maintenance is littleer.

The effective working position of the single roller die body of the utility model is a circle of groove on the side surface of a cylinder, two roller die bodies are easier to mutually laminate to form an effective cold pressing area of a whole round die orifice, the groove comprises a section of arc-shaped effective forming groove, the section of arc-shaped effective forming groove is extended into a straight line groove, two arc lines at the notch of the effective forming groove are kept on the same plane after being extended, the obtained straight line groove is half of the shape of an axial section of conical tube, in the process of roll forming, each pair of roller die bodies are only responsible for processing the passing round steel into a section of conical tube with corresponding size, two adjacent roller die bodies have a certain size superposition part to avoid the overlap seam of the produced conical tube, but the two adjacent roller die bodies are mutually independent and mutually noninterfere, when quality problems occur in the production process of products, the roller die body corresponding to the problem section can be rapidly found out, to quickly repair or replace it.

In addition, the length of the effective forming groove of the single roller die body is 1/2-3/4 of the circumference perimeter of the corresponding groove, so that the effective working length of the roller die is ensured, the forming of the conical tube is not interfered by a transition region between the effective forming groove and an ineffective region in the roller die, the effective forming groove and the ineffective region in the groove are transited by a smooth curved surface, and the forming of the conical tube cannot be influenced by overlarge or undersize feeding amount during reciprocating motion of the roller die.

To sum up, the utility model has the advantages of can be used to the shaping of various size toper pipes in theory, range of application is wide, roller mould long service life, and the cost of follow-up maintenance and maintenance is little to the toper pipe that produces is seamless, continuous and the wall thickness is even.

Drawings

FIG. 1 is a schematic structural view of a roll die body;

FIG. 2 is a side view of the roller die body;

FIG. 3 is a schematic view showing a state before round steel enters a first pair of roller die bodies in the embodiment;

FIG. 4 is a schematic view showing a state during the process of forming a tapered tube;

FIG. 5 is a schematic view showing a full-circle die orifice formed by the mating of two roll die bodies.

The labels in the figures are: 1-roller die body, 11-groove, 12-shaft hole, 111-effective forming groove and 112-ineffective area.

Detailed Description

The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.

Example (b): the roller die for the continuous cold press molding of the conical tube in the embodiment comprises a pair of roller die bodies 1 which are identical in structure and tangent in excircle, an effective cold press area of a full-circle die orifice is formed at a tangent point after the two roller die bodies 1 are matched, and the diameter of the formed full-circle die orifice is gradually increased or reduced along with the reverse synchronous rotation of the pair of roller die bodies.

In the practical application in-process, it is many right to generally use roller die body 1, carry out the continuous cold press molding of multistage alternating no overlap joint conical tube, the conical tube of unlimited length of can forming in theory, every all need pass through the design on the size to roller die body this moment, have different sizes, as shown in fig. 4, wholly follow: the diameter of the round mould opening is gradually reduced along the forming direction, and for a pair of adjacent roller mould bodies, along the movement forming direction of round steel, the minimum diameter of the round mould opening formed by the front pair of roller mould bodies in a matched mode is smaller than the maximum diameter of the round mould opening formed by the back pair of roller mould bodies in a matched mode, namely, the diameter of the round mould opening formed by the front pair of roller mould bodies and the back pair of roller mould bodies in a matched mode is partially overlapped with each other.

Keeping the distance between the adjacent pair of roller die bodies 1 the same, each pair of roller die bodies 1 forms an effective cold pressing area of a full-circle die orifice at a tangent point after being matched, as shown in figure 5.

A core rod is inserted into round steel for forming to serve as an inner die, the round steel and the core rod synchronously rotate and are fed at a certain speed along the direction of a full-circle die orifice, figure 3 is a schematic diagram of the state before the round steel enters a first pair of roller die bodies, the length of the core rod exposed outside the round steel is longer (deformation allowance is reserved for a conical tube), the round steel is not subjected to roll forming, the plurality of pairs of roller die bodies perform linear reciprocating motion under the driving of a linear reciprocating mechanism while the round steel and the core rod are synchronously fed, each pair of roller die bodies perform reverse synchronous rotation along the outer surface of the round steel, the round steel is subjected to roll forming, the round steel gradually passes through the plurality of pairs of roller die bodies, and figure 4 is a schematic diagram of the state that when the conical tube is formed to be close to the tail sound, the conical tube passes through the full-circle die orifice between all the pair of roller die bodies, so that the length of the formed conical tube, at the moment, the length of the core rod exposed outside the round steel is shortened, and the processing of the conical tube is finished after the round steel and the core rod are synchronously fed in place.

As shown in fig. 1 and 2, the single roller die body 1 is in a shape of a cylinder roller as a whole, and an effective working part in an effective cold pressing area is arranged in a cylindrical surface of the cylinder, the effective working part is a circle of groove 11, and the groove 11 comprises an arc-shaped effective forming groove 111; if the arc-shaped effective forming groove 111 is extended into a linear groove, and two arc lines where the notches of the effective forming groove 111 are located on the same plane after being extended, the shape of the obtained linear groove is half of the shape of an axial section of conical tube, and the conical tube is formed; the length of the effective forming groove 111 is 2/3 corresponding to the circumference of the groove 11; the effective forming groove 111 and the non-effective area 112 in the groove 11 are transited by a smooth curved surface; the center of the roller die body 1 is provided with a shaft hole 12, and the roller die body is installed through a shaft and obtains rotary power.

Only 1 pair of the roller die bodies 1 of the utility model can be used for forming the tapered tube, when the size of the roller die body 1 is large enough, and the length of the effective forming groove 111 of a single roller die body 1 can reach the length of the required tapered tube, 1 pair of the roller die bodies 1 of the utility model can be used for forming the tapered tube; consider the size of the power that single pair large-size roller mould body 1 needs in the practical application and the accessory, more be fit for with many right roller mould body 1 cooperation realize the shaping of conical tube, at this moment, single pair roller mould body 1 only need be responsible for processing into certain section of conical tube with the round steel that passes through.

Claims

1. The utility model provides a continuous cold press forming roller mould of conical duct, includes that a pair of structure is the same, roller mould body (1) that the excircle was tangent to be arranged, its characterized in that: after the two roller die bodies (1) are matched, an effective cold pressing area of the full-circle die orifice is formed at a tangent point, and the diameter of the formed full-circle die orifice is gradually increased or reduced along with the reverse synchronous rotation of the pair of roller die bodies.

2. The roller die for cold continuous forming of conical tube according to claim 1, wherein: the single roller die body (1) is a cylinder, the effective working part of the single roller die body in the effective cold pressing area is arranged in the cylindrical surface of the cylinder, the effective working part is a circle of grooves (11), and the grooves (11) comprise a section of arc-shaped effective forming groove (111).

3. The roller die for cold continuous forming of conical tube according to claim 2, wherein: the length of the effective forming groove (111) is 1/2-3/4 corresponding to the circumference of the circumference where the groove (11) is located.

4. The roller die for cold continuous forming of conical tube according to claim 2, wherein: the effective forming groove (111) in the groove (11) is transited with the non-effective area by a smooth curved surface.

5. The roller die for cold continuous forming of conical tube according to claim 1, wherein: the center of the roller die body (1) is provided with a shaft hole (12).