CN115446183A

CN115446183A - Cold press molding device

Info

Publication number: CN115446183A
Application number: CN202211062186.4A
Authority: CN
Inventors: 曾祥坤; 鲍航; 魏玉婷; 高艳红; 黄庆
Original assignee: China Chang Jiang Energy Group Corp
Current assignee: China Chang Jiang Energy Group Corp
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-12-09

Abstract

The invention discloses a cold press molding device, relates to the field of cold press molding of duckbilled pipes, and is used for cold press molding of duckbilled pipes; the cold press molding device comprises a fixed die and a movable die; the fixed die is fixed on the bottom plate, and the movable die moves relatively right above the fixed die; the device also comprises a pressing structure and a feeding structure; the compression structure is configured to limit axial rotation of the tubular; the feed structure is configured to advance the tubing in a direction toward the stationary mold. In the scheme, the duckbilled pipe cold press molding device can greatly improve the processing and mass production capacity of duckbilled parts, and can ensure the one-time performance and the processing precision of products.

Description

Cold press molding device

Technical Field

The invention relates to the field of cold press molding of duckbilled tubes, in particular to a cold press molding device for duckbilled tubes.

Background

The new generation of high thrust engines such as liquid oxygen/kerosene engines mainly use high-strength steel frames, the frames account for about 10-25% of the weight of the whole engine structure, but for aerospace structures, particularly bearing structures of upper stages and space platforms of carrier rockets, duckbilled pipes are important components of the steel frames.

Meanwhile, duckbilled pipes are long and short in size, heating is not allowed during end forming, and only a cold pressing or spinning method can be adopted, but the duckbilled pipes need to have very high strength, the thickness ratio of the walls of the duckbilled pipes is high, the tensile strength and the yield strength of the duckbilled pipes are high, so that the spinning mode cannot meet the requirements, and only the cold pressing mode can be adopted.

In order to meet the design requirements of duckbilled pipe drawing and guarantee the forming consistency of workpieces and the requirement of mass production, a device for cold press forming of duckbilled pipes is specially designed.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a new technical scheme, namely a cold-press molding device, and the cold-press molding device is used for cold-pressing the pipe to complete the manufacturing of the duckbilled pipe.

Specifically, the detailed technical scheme provided by the invention is as follows:

a cold press molding device, which is used for cold press molding of duckbilled pipes; the cold press molding device comprises a fixed die and a movable die; the fixed die is fixed on the bottom plate, and the movable die moves relatively right above the fixed die; the device also comprises a pressing structure and a feeding structure; the compression structure is configured to limit axial rotation of the tubular; the feed structure is configured to advance the tubing in a direction toward the stationary mold.

Further, the pressing structure comprises a base and a V-shaped positioning block arranged on the base; the base is connected with the bottom plate through a guide rail module; when the feeding structure pushes the pipe, the pressing structure synchronously feeds along with the pipe.

Further, the feeding structure comprises a screw seat and a ball screw arranged in the screw seat, and the screw seat is fixed on the bottom plate; and a handwheel disc is fixed at the tail end of the ball screw, a pushing disc is fixed at the head end of the ball screw, and the handwheel disc is rotated forwards or reversely to enable the ball screw to move forwards or backwards.

Furthermore, the ball screw is also provided with scales; the advancing or retreating distance of the ball screw is displayed through scales.

Furthermore, the bottom plate is at least provided with two fixing positions at different positions, and each fixing position is arranged along the feeding direction of the pipe; the spiral seat is fixed on different fixed displacement to adapt to pipes with different lengths.

Further, a front stop block and a side stop block are fixed on the bottom plate, and the front stop block is attached to the left side edge of the fixed die; the side stop block is respectively attached to the left side and the right side of the fixed die.

Further, still be fixed with limit for height piece on the bottom plate, limit for height piece distributes the left side and the right side of cover half, limit for height piece with the cover half interval sets up in order to form the interval space.

Furthermore, a positioning pin is arranged in the fixed die and protrudes upwards; the movable die is provided with a positioning hole corresponding to the positioning pin; when the fixed die and the movable die are assembled, the positioning pin is inserted into the positioning hole.

Furthermore, the movable die is fixed on a spherical disc through a connecting plate, and the spherical disc is fixed with the working surface of the oil press.

The technical scheme has the following beneficial effects:

the invention of the duckbilled tube cold press molding device can greatly improve the processing and mass production capacity of duckbilled parts and ensure the one-time performance and the processing precision of products.

Drawings

Fig. 1 is a schematic sectional view of the cold press molding device of the scheme.

FIG. 2 is a structural view of the fixed mold fixed to the base plate.

Wherein: 11 fixed moulds, 12 bottom plates, 13 stoppers, 14 height limiting blocks, 15 positioning pins, 21 movable moulds, 22 connecting plates, 23 spherical discs, 31 bases, 32 positioning blocks, 41 spiral seats, 42 ball screws, 43 hand wheel discs and 44 push discs.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the invention.

The embodiment provides a cold press molding device, which is used for processing a pipe by utilizing the cold press molding device and further completing the cold press molding of the duckbilled pipe.

Specifically, referring to fig. 1-2, the cold press molding device provided by the scheme comprises a fixed die 11 and a movable die 21; the fixed mold 11 is fixed on the bottom plate 12, and the movable mold 21 is directly above the fixed mold 11 and can move relative to the fixed mold 11. In the actual work, place tubular product in the cover half 11, then movable mould 21 is gone down to realize colding pressing to tubular product, and movable mould 21 is gone up again after the pressurize for a period of time and is resetd, has had the duckbilled shape tubular product after the cold press molding in the one-tenth die cavity of cover half 11 this moment.

In the scheme, the device also comprises a pressing structure and a feeding structure; the compression structure herein is configured to limit axial rotation of the tubular; the feed structure is configured to advance the pipe in a direction toward the fixed mold 11. In addition, the compression structure is provided, the axial rotation of the pipe is limited by the compression structure, and the forming precision of a final product is ensured.

The feeding mechanism is used for realizing stable gradual feeding of the pipe, the feeding length is about 5 mm each time, and the cold pressing is carried out once the moving die 21 is fed each time until the duckbilled molded line at the end part of the pipe is completely molded.

In this embodiment, the fixed mold 11 is further provided with a positioning pin 15, and the positioning pin 15 protrudes upwards; the movable die 21 is provided with a positioning hole corresponding to the positioning pin 15; when the fixed die 11 and the movable die 21 are assembled, the positioning pin 15 is inserted into the positioning hole. The positioning pin 15 is designed for positioning between the movable mold 21 and the fixed mold 11, so as to ensure that the dislocation is avoided in the mold closing process.

The movable die 21 is fixed on a spherical disc 23 through a connecting plate 22, and the spherical disc 23 is fixed with a working surface of an oil press (not shown). The spherical disc 23 is used for preventing the uneven profile forming of the pipe caused by insufficient precision and uneven force application of oil press equipment.

In this embodiment, the pressing structure includes a base 31 and a V-shaped positioning block 32 disposed on the base 31; the base 31 is connected with the bottom plate 12 through a guide rail module; when the feeding structure pushes the pipe, the pressing structure synchronously feeds along with the pipe. It can be understood that the compressing structure is movably connected with the bottom plate 12 through the guide rail module, and when the feeding structure starts to move, the compressing structure will synchronously advance along with the pipe and advance towards the fixed die 11 under the guidance of the guide rail module. Through the structural design, the position of the pipe clamped by the pressing mechanism can be effectively fixed.

Meanwhile, in the present embodiment, the feeding structure includes a screw seat 41 and a ball screw 42 disposed in the screw seat 41, and the screw seat 41 is fixed on the bottom plate 12; a hand wheel disc 43 is fixed at the tail end of the ball screw 42, a pushing disc 44 is fixed at the head end of the ball screw 42, and the hand wheel disc 43 is rotated forward or backward to make the ball screw 42 move forward or backward. The ball screw 42 is also provided with scales; the advance or retreat distance of the ball screw 42 is displayed by a scale.

The ball screw 42 with scales is adopted to control the feeding amount of the pipe and ensure the forming consistency of the workpiece; meanwhile, the feeding uniformity and controllability of the workpiece are ensured, and the workpiece can be quantitatively adjusted.

Optionally, at least two fixing positions at different positions are arranged on the bottom plate 12, and each fixing position is arranged along the feeding direction of the pipe; the screw seat 41 is fixed at different fixed displacements to adapt to pipes with different lengths. That is, the feeding mechanism has two mounting fixtures on the base 12 for accommodating the feeding of workpieces of inconsistent lengths.

In the scheme, a stop block 13 is fixed on the bottom plate 12 and specifically comprises a front stop block and a side stop block, and the front stop block is attached to the left side edge of the fixed die 11; the side stop blocks are respectively attached to the left side and the right side of the fixed die 11. With the front and side stoppers here, it is ensured that the fixed mold 11 does not move.

In the scheme, the bottom plate 12 is further fixed with height limiting blocks 14, the height limiting blocks 14 are distributed on the left side and the right side of the fixed die 11, and the height limiting blocks 14 are arranged at intervals with the fixed die 11 to form an interval space. The height limiting block 14 can be used for ensuring the pressing height of the movable die 21. The direct damage and the scrapping of the die caused by the fact that the movable die 21 directly impacts the fixed die 11 when mechanical failure occurs are avoided. Meanwhile, an interval space formed between the height limiting block 14 and the fixed die 11 is used for conveniently discharging redundant slag in the cold pressing process.

Meanwhile, in the scheme, threaded holes are formed in two sides of the bottom plate 12 and used for mounting lifting ring screws; the lifting ring screw is used for facilitating the movement of the whole device; and a slot hole is provided in the bottom plate 12 for mounting the fixed mold 11, the stopper 13, the height restricting block 14, and the like described above.

In the technical scheme, the duckbilled pipe cold press molding device can greatly improve the processing and mass production capacity of duckbilled parts, and can ensure the one-time performance and the processing precision of products.

For a detailed understanding of the present solution, the specific steps for using the present apparatus are described below.

The method comprises the following steps: after the length of a workpiece (namely a pipe) is determined, the feeding structure is selected to be fixed on a corresponding fixing position, and the positioning pin, the height limiting block, the front stop block, the rear stop block, the fixed die, the pressing structure and the feeding structure are fixed on the bottom plate through bolts.

Step two: the movable die is fixed on the connecting plate through the bolt and the positioning pin, and the movable die, the connecting plate and the spherical disc are fixed on the upper working surface of the oil press through the bolt.

Step three: the bottom plate is placed on the lower working surface of the oil press through the lifting bolt, the position of the bottom plate is determined through the positioning pin between the movable die and the fixed die, and then the bottom plate is fixed on the lower working surface of the oil press through the pressing plate.

Step four: and placing the workpiece on the initial position of the fixed die, and pressing the workpiece by using a pressing structure.

Step five: the oil press presses the pipe to be molded by applying pressure through the spherical disc, and after the pipe is stopped for 3 seconds, the oil press is lifted up, and the pipe is moved forwards by 5 millimeters through the feeding structure.

Step six: repeating the step five for multiple times until the duckbilled molded line at the end part of the pipe is completely molded.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the art are used, and are used only for convenience in describing the technology and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the technology. Furthermore, "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Thus, the terms "first," "second," "third," and the like are used solely to distinguish one from another without necessarily indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present technology, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and can be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present technology can be understood in a specific case to those of ordinary skill in the art.

It should be noted that there are no specific structures in the above description, and it will be apparent to those skilled in the art that various modifications, decorations, or changes can be made without departing from the technical principles of the present invention; such modifications, variations, or combinations, or applying the concepts and solutions of the technology directly to other applications without further modifications, are intended to be within the scope of the present technology.

Claims

1. A cold press molding device, which is used for cold press molding of duckbilled pipe fittings; the cold press molding device comprises a fixed die (11) and a movable die (21); the fixed die (11) is fixed on the bottom plate (12), and the movable die (21) moves relatively right above the fixed die (11); the device is characterized by also comprising a pressing structure and a feeding structure; the compression structure is configured to limit axial rotation of the tubular; the feeding structure is configured to advance the pipe in the direction of the fixed die (11).

2. The cold press forming apparatus of claim 1, wherein said pressing structure comprises a base (31) and a V-shaped locating block (32) disposed on said base (31); the base (31) is connected with the bottom plate (12) through a guide rail module; when the feeding structure pushes the pipe, the pressing structure synchronously feeds along with the pipe.

3. Cold press forming device according to claim 2, wherein said feed structure comprises a screw seat (41) and a ball screw (42) arranged inside said screw seat (41), said screw seat (41) being fixed to said bottom plate (12); a hand wheel disc (43) is fixed at the tail end of the ball screw (42), a push disc (44) is fixed at the head end of the ball screw (42), and the hand wheel disc (43) is rotated forward or backward to enable the ball screw (42) to move forward or backward.

4. The cold press forming apparatus according to claim 3, wherein said ball screw (42) is further provided with a scale; the advancing or retreating distance of the ball screw (42) is displayed through scales.

5. Cold press forming device according to claim 3 or 4, wherein said bottom plate (12) is provided with at least two different fixed positions, each of said fixed positions being arranged along the feeding direction of the tubes; the spiral seat (41) is fixed at different fixed displacements to adapt to pipes with different lengths.

6. The cold press forming device according to claim 1, wherein a front stop and a side stop are fixed on the bottom plate (12), and the front stop is jointed with the left side edge of the fixed die (11); the side stop block is respectively attached to the left side and the right side of the fixed die (11).

7. The cold press forming device according to claim 1, wherein the bottom plate (12) is further fixed with height limiting blocks (14), the height limiting blocks (14) are distributed on the left side and the right side of the fixed die (11), and the height limiting blocks (14) are arranged at intervals with the fixed die (11) to form an interval space.

8. The cold press forming device according to claim 1, wherein the fixed die (11) is further provided with a positioning pin (15), and the positioning pin (15) protrudes upwards; the movable die (21) is provided with a positioning hole corresponding to the positioning pin (15); when the fixed die (11) and the movable die (21) are assembled, the positioning pin (15) is inserted into the positioning hole.

9. Cold press forming device according to claim 1, characterised in that the moving die (21) is fixed to a spherical disc (23) by means of a connecting plate (22), said spherical disc (23) being fixed to the working surface of the oil press.