Follow-up reverse-pushing perforating needle positioning mechanism for seamless tube profile extruding machine

Abstract

The utility model provides a follow-up reverse thrust piercing needle positioning mechanism for a seamless tube profile extruder, which comprises a main driving part, an auxiliary driving part, a material containing barrel and an extrusion die, the driving end of the main driving part is connected with an extrusion rod, the auxiliary driving part is arranged in the main driving part, the driving end of the auxiliary driving part is connected with a piercing needle and a conjugate ejector rod, and the conjugate ejector rod is arranged in the extrusion rod. A through material cavity is formed in the material containing barrel, the extrusion die is arranged in the material cavity, one end of the extrusion rod is in sliding connection with the material cavity, a discharging hole is formed in the extrusion die, the diameter of the perforating needle is smaller than the inner diameter of the discharging hole, and the perforating needle penetrates through the extrusion rod and is coaxial with the discharging hole. The conjugate ejector rod penetrates through the driving end of the main driving piece and is opposite to the material containing barrel. Compared with the prior art, the push rod reverse thrust mechanical positioning is more accurate, the relative static accurate matching between the outer die and the inner die is completely realized without displacement all the time, a stable extrusion working belt is formed, the mechanism is completely hidden in the inner cavity of the plunger of the main oil cylinder, the whole machine structure is more concise, and the repair and maintenance are less.

Description

TECHNICAL FIELD

[0001] The utility model belongs to extruder technical field, more specifically, it relates to be used for seamless pipe section bar extruder's follow-up anti -pushing piercing needle positioning mechanism. BACKGROUND

[0002] The most critical technology of the (reverse) double-action extruder (mainly used for the extrusion of aluminum or copper seamless pipes) lies in the dynamic accurate positioning cooperation of the piercing needle (inner die) and the outer die, forming an extrusion working zone to meet the requirements of the extrusion process.

[0003] The traditional method is to push the piercing needle and the extruder main hydraulic cylinder in the opposite direction by an auxiliary hydraulic mechanism during the extrusion process, so as to realize the cooperation of the outer die (die) and the inner die (piercing needle) that are always relatively stationary and do not shift.

[0004] The (reverse) double-action extruder in the prior art adopts an auxiliary hydraulic mechanism + external mechanical guide limiting mode, which generally has a longer machine body structure, a more complex structure, a very large whole machine, and a cost that is more than 1.5 times that of an ordinary single-action forward extruder of the same tonnage (nominal extrusion force). SUMMARY

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of providing a follow-up anti-pushing piercing needle positioning mechanism for a seamless pipe section bar extruder, which comprises a main driving member, an auxiliary driving member, a material containing cylinder and an extrusion die.

[0006] Optionally, the main driving member comprises a main oil cylinder and a main piston rod, the extrusion rod is fixedly connected with the main piston rod, and the auxiliary driving member is located in the main piston rod.

[0007] Optionally, the auxiliary driving member comprises an auxiliary oil cylinder and an auxiliary piston rod, the perforating needle is fixedly connected with the auxiliary piston rod, and the conjugate top rod is fixedly connected with the auxiliary piston rod and used for abutting against the end face of the material containing cylinder.

[0008] Optionally, the conjugate top rod is in a plurality of numbers and is arranged in a central symmetry around the perforating needle.

[0009] Optionally, the front beam plate is fixedly connected with the rear beam plate through an extruding machine pull rod, the rear beam plate is fixedly connected with the main driving member, the material containing cylinder is fixedly connected with the front beam plate, and the front beam plate is provided with an opening corresponding to the position of the material cavity.

[0010] The follow-up reverse pushing perforating needle positioning mechanism for the seamless pipe profile extruding machine has the advantages that:

[0011] 1. The utility model discloses a built-in auxiliary hydraulic cylinder and conjugate top rod reverse pushing positioning mechanism, and the top rod reverse pushing mechanical positioning is more accurate, the relative static accurate cooperation between the outer die and the inner die (perforating needle) is always realized without displacement, a stable extruding work zone is formed, and the mechanism is completely hidden in the inner cavity of the plunger of the main oil cylinder, so that the whole machine structure is more simple, and the maintenance is less.

[0012] 2. The utility model greatly reduces the cost of the forward (reverse) double-action extruding machine. Through equipment modification application, the utility model only has 2% (1000 tons of extruding force below), 1% (2000 tons of extruding force below) and 0.5% (2000 tons of extruding force above) of the cost of the existing forward (reverse) double-action extruding machine.

[0013] 3. The utility model greatly simplifies the mechanical structure and the complexity of control technology of the whole machine, greatly reduces the use cost (work die) and maintenance cost of the equipment, makes the process simpler, the operation more convenient, the product quality more stable, and realizes the extrusion production of seamless pipes.

[0014] 4. For the original common forward single-action extruding machine, the utility model only needs to process a few original components and increase a little cost (mainly structure assembly) on the basis of the original machine without changing the main structure, so that the forward single-action can be transformed into forward (reverse) double-action extruding function. DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 The structure schematic diagram of the follow-up anti-pushing piercing needle positioning mechanism for the seamless pipe profile extruding machine is provided for the embodiments of the present application.

[0017] In the drawings, various reference signs:

[0018] 1, main oil cylinder; 2, main piston rod; 3, auxiliary oil cylinder; 4, auxiliary piston rod; 5, extruding rod; 6, conjugate top rod; 7, piercing needle; 8, material containing cylinder; 9, extruding material; 10, extruding die; 11, front beam plate; 12, extruding machine pull rod; 13, rear beam plate. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0021] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0023] Please refer to Figure 1 The follow-up anti-pushing piercing needle positioning mechanism for the seamless pipe profile extruding machine provided by the embodiments of the present application will be described.

[0024] The utility model relates to a kind of follow-up anti-push piercing needle 7 positioning mechanism for seamless pipe profile extrusion machine, including main drive, auxiliary drive, material cylinder 8 and extrusion die 10, the driving end of main drive is connected with extrusion rod 5, auxiliary drive is set in main drive, the driving end of auxiliary drive is connected with piercing needle 7 and conjugate ejector rod 6, material cylinder 8 is provided with through cavity, extrusion die 10 is arranged in cavity, one end of extrusion rod 5 is slidably connected with cavity, extrusion die 10 is provided with discharge hole, the diameter of piercing needle 7 is less than the inner diameter of discharge hole, piercing needle 7 passes through extrusion rod 5 and is coaxially arranged with discharge hole, conjugate ejector rod 6 passes through the driving end of main drive and is oppositely arranged with material cylinder 8.

[0025] Auxiliary drive pushes piercing needle 7 (inner die) and conjugate ejector rod 6 to move, piercing needle 7 passes through extrusion material 9 and cooperates with extrusion die 10 (outer die) to form extrusion working zone, and at this time, conjugate ejector rod 6 simultaneously pushes against material cylinder 8;Subsequently, main drive pushes extrusion rod 5 to apply extrusion force to extrusion material 9, and extrusion material 9 is extruded from working zone to form seamless pipe profile material. Since auxiliary drive is fixed on the driving end of main drive, it will inevitably move with the driving end of main drive, causing piercing needle 7 to move, but since conjugate ejector rod 6 pushes against stationary material cylinder 8, the counterforce of conjugate ejector rod 6 causes the driving end of auxiliary drive to move backward, so that piercing needle 7 and conjugate ejector rod 6 are always stationary during the extrusion of extrusion material 9, ensuring that piercing needle 7 and extrusion die 10 form a stable and precise extrusion working zone, and realizing the function of forward double-action extrusion.

[0026] In another embodiment of the utility model, if conjugate ejector rod 6 passes through material cylinder 8 (material cylinder 8 drills through hole corresponding to conjugate ejector rod 6 position) and pushes against die holder (not shown in the figure, fixed on front beam plate 11), when main drive of extrusion machine pushes material cylinder 8 to move, conjugate ejector rod 6 drives piercing needle 7 to move in the opposite direction, ensuring that piercing needle 7 and extrusion die 10 accurately cooperate to form a stable extrusion working zone, and realizing the function of reverse double-action extrusion.

[0027] In some embodiments of the utility model, extrusion material 9 uses pre-pierced (or machined) aluminum bar, and if the cylinder diameter of auxiliary drive is large enough (i.e. the hydraulic pressure is large enough), online piercing forward (reverse) extrusion function can be realized.

[0028] In some embodiments of the utility model, main drive part includes main oil cylinder 1 and main piston rod 2, extruding rod 5 is fixedly connected with main piston rod 2, and auxiliary drive part is located in main piston rod 2. Main oil cylinder 1 can drive main piston rod 2 to move, and main piston rod 2 can drive auxiliary drive part fixedly connected therewith to move synchronously, so that the precise cooperation of outer die (extruding die 10) and inner die (perforating needle 7) is realized. And auxiliary drive part is completely hidden in the inner cavity of main piston rod 2, so that the whole machine structure is more simple, and maintenance is less.

[0029] In some embodiments of the utility model, auxiliary drive part includes auxiliary oil cylinder 3 and auxiliary piston rod 4, perforating needle 7 is fixedly connected with auxiliary piston rod 4, and conjugate ejector rod 6 is fixedly connected with auxiliary piston rod 4 and is used for abutting the end face of material containing cylinder 8.

[0030] Auxiliary piston rod 4 pushes perforating needle 7 (inner die) and conjugate ejector rod 6 (integrally formed with perforating needle 7) to move, and perforating needle 7 passes through extruding material 9 (hollow aluminum bar is adopted in the embodiment) and cooperates with extruding die 10 (outer die) to form extruding work belt, and at this time, conjugate ejector rod 6 abuts material containing cylinder 8 at the same time; subsequently, main piston rod 2 pushes extruding rod 5 to apply extruding force to aluminum bar (temperature is about 500 DEG C) and extrudes the semi-solid aluminum material from work belt to form seamless pipe profile material. Since auxiliary oil cylinder 3 is fixed on main piston rod 2 and moves along with main piston rod 2, perforating needle 7 is moved, but since conjugate ejector rod 6 abuts stationary material containing cylinder 8, the counterthrust of conjugate ejector rod 6 makes auxiliary piston rod 4 (relative to main piston rod 2) move backward, and thus the aluminum bar is extruded, and perforating needle 7 and conjugate ejector rod 6 are always stationary, which guarantees that perforating needle 7 and extruding die 10 form stable and precise extruding work belt, and realizes the functions of forward double-action extrusion and reverse double-action extrusion, and the reverse double-action extrusion has been described in the foregoing, so it will not be repeated.

[0031] In some embodiments of the utility model, the number of conjugate ejector rods 6 is multiple, and the conjugate ejector rods 6 are centrally symmetrically arranged around perforating needle 7.

[0032] In some embodiments of the utility model, the number of conjugate ejector rods 6 is 2, and the conjugate ejector rods 6 are symmetrically arranged on the two sides of perforating needle 7. Alternatively, the number of conjugate ejector rods 6 can also be 3, 4, 5 or the like, and the conjugate ejector rods 6 are centrally symmetrically arranged around perforating needle 7.

[0033] In some embodiments of the utility model, referring to Figure 1 , it further includes front beam plate 11 and rear beam plate 13, front beam plate 11 is fixedly connected with rear beam plate 13 through extruding machine pull rod 12, rear beam plate 13 is fixedly connected with main drive part, material containing cylinder 8 is fixedly connected with front beam plate 11, and the opening corresponding to the position of material cavity is arranged on front beam plate 11.

[0034] The front beam plate 11 and the rear beam plate 13 are used for fixing the main oil cylinder 1 and the extrusion die 10, so that the positions of the main oil cylinder 1 and the extrusion die 10 do not change, and the extruded material 9 can be extruded out from the opening provided on the front beam plate 11 after being extruded.

[0035] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A servo-anti-push piercing pin positioning mechanism for seamless pipe profile extrusion machines, characterized in that: The utility model provides an extrusion device, which comprises a main driving element, an auxiliary driving element, a material containing cylinder and an extrusion die, the driving end of the main driving element is connected with an extrusion rod, the auxiliary driving element is arranged in the main driving element, the driving end of the auxiliary driving element is connected with a perforating needle and a conjugate ejector rod, the material containing cylinder is provided with a material cavity penetrating through, the extrusion die is arranged in the material cavity, one end of the extrusion rod is in sliding connection with the material cavity, the extrusion die is provided with a discharging hole, the diameter of the perforating needle is smaller than the inner diameter of the discharging hole, the perforating needle passes through the extrusion rod and is coaxially arranged with the discharging hole, and the conjugate ejector rod passes through the driving end of the main driving element and is arranged opposite to the material containing cylinder.

2. The follow-up counter-pushing piercing pin positioning mechanism for seamless pipe profile extrusion presses according to claim 1, characterized in that: The main driving element comprises a main oil cylinder and a main piston rod, the extrusion rod is fixedly connected with the main piston rod, and the auxiliary driving element is located in the main piston rod.

3. The follow-up counter-pushing piercing pin positioning mechanism for seamless pipe profile extrusion presses according to claim 2, characterized in that: The auxiliary driving element comprises an auxiliary oil cylinder and an auxiliary piston rod, the perforating needle is fixedly connected with the auxiliary piston rod, and the conjugate ejector rod is fixedly connected with the auxiliary piston rod and used for abutting against the end face of the material containing cylinder.

4. The follow-up counter-pushing piercing pin positioning mechanism for seamless pipe profile extrusion presses according to claim 3, characterized in that: The number of the conjugate ejector rods is multiple, and the conjugate ejector rods are centrally symmetrically arranged with the perforating needle as the center.

5. The follow-up counter-pushing piercing pin positioning mechanism for seamless pipe profile extrusion presses of claim 1, characterized in that: The utility model further comprises a front beam plate and a rear beam plate, the front beam plate is fixedly connected with the rear beam plate through an extruding machine pull rod, the rear beam plate is fixedly connected with the main driving element, the material containing cylinder is fixedly connected with the front beam plate, and the front beam plate is provided with an opening corresponding to the position of the material cavity.

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