Head hydraulic press

Abstract

The invention relates to the technical field of hydraulic machinery, in particular to an end socket hydraulic machine which comprises a mounting frame, a hydraulic cylinder is mounted on the mounting frame, an upper die is mounted at one end of the hydraulic cylinder, a lower die is mounted on the mounting frame below the upper die, and an annular pressing edge is arranged on the mounting frame on the peripheral side of the upper die. The distance between the annular pressing edge and the lower die can be adjusted, the angle between the annular pressing edge and the horizontal plane can be adjusted, the edge pressing force borne by the edge plane is uniform when the end socket is machined, and the defects caused by the flatness error of the die are overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic machinery, and specifically relates to a head hydraulic press. Background Art

[0002] A head is an important component on pressure vessels such as boilers, oil refineries, and chemical equipment. The quality of the head directly affects the service life of the pressure vessel. When hydroforming a flanged head, the middle part of the flanged head is a curved surface, and the edge is an annular planar structure. It is processed through the cooperation of the upper die and the lower die. During the use of the die, the flatness of the die is prone to errors, which will cause uneven blank holding force, resulting in machining errors in the flatness of the planar part at the edge of the head and affecting the quality of the head. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art and overcoming the defects of the prior art, the purpose of the present invention is to provide a hydraulic press to solve the problem of uneven blank holding force on the edge plane during head processing.

[0004] Its technical solution is that a head hydraulic press includes a mounting frame, a hydraulic cylinder is installed on the mounting frame, an upper die is installed at one end of the hydraulic cylinder, a lower die is installed under the upper die on the mounting frame, an annular blank holder is arranged on the outer peripheral side of the upper die on the mounting frame, the distance between the annular blank holder and the lower die is adjustable, and the angle between the annular blank holder and the horizontal plane is adjustable.

[0005] Preferably, the annular blank holder is sleeved on the upper die, the annular blank holder is rotationally connected to the movable end of the telescopic rod, and the mounting frame is slidably connected to the fixed end of the telescopic rod. The sliding directions of the telescopic rods relative to the mounting frame are outward along the axis of the hydraulic cylinder, and the telescopic rods are arranged in the vertical direction.

[0006] Preferably, the annular blank holder is sleeved on the upper die, the annular blank holder is rotationally connected to the movable end of the telescopic rod, and the mounting frame is rotationally connected to the fixed end of the telescopic rod.

[0007] Preferably, the annular blank holder is movably connected to the upper die, the mounting frame is rotationally connected to the fixed end of the telescopic rod, and a connection unit with adjustable length is installed between the movable ends of the telescopic rods and the annular blank holder, forming a structure for adjusting the distance between the annular blank holder and the lower die through the hydraulic cylinder or the telescopic rod.

[0008] Preferably, the mounting frame includes an upper beam seat and a lower beam seat. The upper beam seat and the lower beam seat are fixedly connected by support rods. The upper beam seat is fixedly connected to the hydraulic cylinder. The lower die is installed on the lower beam seat, and a top cylinder is installed under the lower die on the lower beam seat.

[0009] Preferably, the annular edge pressing includes an edge pressing reinforcing ring and a lower edge pressing. The edge pressing reinforcing ring is rotatably connected to the telescopic rod, the lower edge pressing is fixedly connected to the edge pressing reinforcing ring, and the lower edge pressing is located below the edge pressing reinforcing ring.

[0010] Preferably, a driving motor is fixedly connected to the mounting frame. The output shafts of the driving motors are fixedly connected to lead screws. Nut blocks are threadedly connected to the lead screws. The nut blocks are fixedly connected to the fixed ends of the telescopic rods.

[0011] Preferably, the connecting unit includes first rods and second rods. The first rods are slidably connected to the second rods. Limit members for fixing the first rods and the second rods are installed at the joints of the first rods and the second rods. The first rods are fixedly connected to the movable ends of the telescopic rods. The second rods are rotatably connected to the annular edge pressing.

[0012] Preferably, the limit members include sliders. The sliders are slidably connected to the first rods. The sliders are located on both sides of the axis of the first rods. The first rods are sleeved on the second rods. The sliding direction of the sliders relative to the first rods is inclined outward along the direction from the first rods to the second rods. An adjustable rod with adjustable length is installed between the sliders.

[0013] Preferably, elastic members made of elastic materials are installed between the annular edge pressing and the upper die. The elastic members are annularly distributed along the axis of the annular edge pressing.

[0014] The present invention provides a hydraulic press, and the beneficial effects compared with the prior art are as follows:

[0015] 1. By adjusting the angle between the annular edge pressing and the horizontal plane, and the distance between the annular edge pressing and the lower die, the edge pressing force on the edge plane during the head processing is made uniform, compensating for the defects caused by the flatness error of the die.

[0016] 2. Through the connection between the annular edge pressing and the universal joint connecting disc, the annular edge pressing and the universal joint connecting disc can be detachably replaced, facilitating the processing of heads with different sizes. Description of the Drawings

[0017] Figure 1 is a three-dimensional schematic diagram of the present invention.

[0018] Figure 2 is a front view schematic diagram of the present invention.

[0019] Figure 3 is a front view schematic diagram of the second embodiment of the present invention.

[0020] Figure 4 is a front view schematic diagram of the third embodiment of the present invention.

[0021] In the figure: 1 mounting bracket, 1.1 upper beam seat, 1.2 lower beam seat, 1.3 support rod, 2 hydraulic cylinder, 3 upper die, 4 lower die, 5 annular blank holder, 5.1 blank holder reinforcement ring, 5.2 lower blank holder, 6 drive motor, 7 telescopic rod, 8 connecting unit, 8.1 first rod, 8.2 second rod, 8.3 limiting member, 8.3.1 slider, 8.3.2 adjusting rod, 9 elastic member, 10 jacking cylinder. Detailed implementation manners

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0023] In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mount", "connect", "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] The present invention will be further described in detail below through specific implementation examples in combination with the accompanying drawings.

[0025] Please refer to Figure 1-2, the present invention provides a technical solution: a head hydraulic press, including a mounting frame 1, the mounting frame 1 is bolted to the fixed end of the hydraulic cylinder 2, the movable end of the hydraulic cylinder 2 is bolted to the upper die 3, the mounting frame 1 is bolted to the lower die 4 below the upper die 3, the mounting frame 1 is provided with an annular edge pressing 5 on the outer peripheral side of the upper die 3, the distance between the annular edge pressing 5 and the lower die 4 is adjustable, and the angle between the annular edge pressing 5 and the horizontal plane is adjustable. During use, through the cooperation of the upper die 3, the annular edge pressing 5 and the lower die 4, the middle curved surface of the head is processed, and through the cooperation of the annular edge pressing 5 and the lower die 4, the plane at the edge of the head is processed. By adjusting the angle between the annular edge pressing 5 and the horizontal plane and the distance between the annular edge pressing 5 and the lower die 4, the edge plane of the head during processing is uniformly pressed by the edge pressing force, compensating for the defects caused by the flatness error of the die.

[0026] In one embodiment, the annular edge pressing 5 is sleeved outside the upper die 3, the movable end of the annular edge pressing 5 is rotatably connected to the universal joint connecting disc of the telescopic rod 7, the mounting frame 1 is slidably connected to the fixed end of the telescopic rod 7, the sliding directions of the telescopic rods 7 relative to the mounting frame 1 are outward along the axis of the hydraulic cylinder 2, and the telescopic rods 7 are arranged vertically. Through the rotational connection between the annular edge pressing 5 and the telescopic rod 7, when the annular edge pressing 5 and the lower die 4 cooperate, the angle between the annular edge pressing 5 and the horizontal plane can be automatically adjusted according to the action of the annular edge pressing 5 on the head, so that the edge plane of the head during processing is uniformly pressed by the edge pressing force. Among them, during the head processing, the flatness angle error generated by the existing die is generally less than 1°. The change in the angle of the annular edge pressing 5 relative to the horizontal plane results in a relatively small displacement change of the connection between the annular edge pressing 5 and the telescopic rod 7 on the horizontal plane, which can be basically ignored during processing. Further, this part of the influence can be reduced or eliminated by the sliding of the telescopic rod 7 and the mounting frame 1.

[0027] In one embodiment, a driving motor 6 is bolted to the mounting frame 1, the driving motor 6 is a stepping motor, the output shafts of the driving motors 6 are fixedly connected to the lead screws through couplings, nut blocks are threadedly connected to the lead screws, and the nut blocks are fixedly connected to the fixed ends of the telescopic rods 7. The connection method between the nut blocks and the telescopic rods 7 is a suitable fixing method such as welding or bolt fixing. The movable end of the telescopic rod 7 is bolted to the universal joint connecting disc, and the annular edge pressing 5 is bolted or screwed to the universal joint connecting disc, so that the annular edge pressing 5 and the universal joint connecting disc are detachably replaceable. When processing heads of different sizes, the annular edge pressing 5 can be detached from the universal joint connecting disc, the position of the telescopic rod 7 relative to the mounting frame 1 can be adjusted, and then the annular edge pressing 5 with a suitable size can be replaced to process heads of different sizes.

[0028] In one embodiment, the mounting frame 1 includes an upper beam seat 1.1 and a lower beam seat 1.2. The upper beam seat 1.1 and the lower beam seat 1.2 are bolted together through a support rod 1.3. The upper beam seat 1.1 is bolted to the hydraulic cylinder 2, and the lower beam seat 1.2 is bolted to the lower die 4. The lower beam seat 1.2 is bolted with a top cylinder 10 below the lower die 4. When the head is placed on the lower die 4, the top cylinder 10 is directly below the head. The top cylinder 10 is a suitable component such as an oil cylinder. Through the top cylinder 10, it is convenient to remove the processed head from the lower die 4. In addition, the mounting frame 1 of the traditional head hydraulic press structure is composed of upper and lower beam seats 1.2 and a blank holder beam. The head hydraulic press in this solution only consists of upper and lower beam seats 1.2, reducing the manufacturing cost.

[0029] In one embodiment, the annular blank holder 5 includes a blank holder reinforcement ring 5.1 and a lower blank holder 5.2. The blank holder reinforcement ring 5.1 is rotatably connected to the telescopic rod 7 through a universal joint connecting disc. The lower blank holder 5.2 is bolted or screwed to the blank holder reinforcement ring 5.1. The lower blank holder 5.2 is located below the blank holder reinforcement ring 5.1.

[0030] In one embodiment, referring to Figure 3 , the annular blank holder 5 is sleeved on the upper die 3. The annular blank holder 5 is rotatably connected to the movable end of the telescopic rod 7 through a universal joint connecting disc. The mounting frame 1 is rotatably connected to the fixed end of the telescopic rod 7 through a universal joint connecting disc. By changing the lengths of the telescopic rods 7, the angle between the annular blank holder 5 and the horizontal plane, and the distance between the annular blank holder 5 and the lower die 4 are adjusted, so that the blank holding force on the edge plane during head processing is uniform.

[0031] In one embodiment, referring to Figure 4 , the annular blank holder 5 is movably connected to the upper die 3. The mounting frame 1 is rotatably connected to the fixed end of the telescopic rod 7 through a universal joint connecting disc. A length-adjustable connecting unit 8 is installed between the movable ends of the telescopic rods 7 and the annular blank holder 5, forming a structure for adjusting the distance between the annular blank holder 5 and the lower die 4 through the hydraulic cylinder 2 or the telescopic rod 7. Among them, during the downward movement of the annular blank holder 5, the lowest point of the annular blank holder 5 is lower than the lowest point of the upper die 3. When in use, first, through the operation of the hydraulic cylinder 2, the upper die 3 is driven to move downward, thereby driving the annular blank holder 5 to move downward. Then, the telescopic rod 7 is used to push the annular blank holder 5 downward to process the head. After processing, through the operation of the hydraulic cylinder 2, the upper die 3 is driven to move upward, thereby driving the annular blank holder 5 to move upward. At the same time, the telescopic rod 7 returns to its original position, reducing the stroke of the telescopic rod 7, facilitating the synchronous movement of the annular blank holder 5 and the lower die 4, providing convenience for the annular blank holder 5 to contact the head, and being conducive to the annular blank holder 5 applying force.

[0032] In one embodiment, referring to Figure 4, the connecting unit 8 includes a first rod 8.1 and a second rod 8.2. Each first rod 8.1 is slidably connected to the second rod 8.2. A limiting member 8.3 for fixing the first rod 8.1 and the second rod 8.2 to each other is installed at the connection of each first rod 8.1 and the second rod 8.2. Each first rod 8.1 is bolted to the moving end of the telescopic rod 7. Each second rod 8.2 is rotatably connected to the annular bead 5 through a universal joint connecting disc. Through the rotational connection between the second rod 8.2 and the annular bead 5, and the rotational connection between the mounting bracket 1 and the telescopic rod 7, it is convenient to adjust the angle between the annular bead 5 and the horizontal plane.

[0033] In one embodiment, refer to Figure 4 , the limiting member 8.3 includes a slider 8.3.1. Each slider 8.3.1 is slidably connected to the first rod 8.1. Each slider 8.3.1 is located on both sides of the axis of the first rod 8.1. Each first rod 8.1 is sleeved outside the second rod 8.2. The sliding direction of each slider 8.3.1 relative to the first rod 8.1 is inclined outward along the direction from the first rod 8.1 to the second rod 8.2. An adjustable rod 8.3.2 with adjustable length is installed between each slider 8.3.1. Among them, there are two sliders 8.3.1 at each first rod 8.1 in a suitable number. Each slider 8.3.1 is symmetrically arranged relative to the axis of the first rod 8.1. The sliding channels of each slider 8.3.1 are also symmetrically arranged relative to the axis of the first rod 8.1. The adjustable rod 8.3.2 is a suitable component such as an electric telescopic rod. The connection method between the adjustable rod 8.3.2 and the slider is a suitable fixed connection method such as welding or screw fixation, and it can also be a rotational connection. When the sliders 8.3.1 are separated from the second rod 8.2 through the adjustable rod 8.3.2, the first rod 8.1 can slide relative to the second rod 8.2. When the sliders 8.3.1 are in extrusion contact with the second rod 8.2 through the adjustable rod 8.3.2, the first rod 8.1 is fixed relative to the second rod 8.2. In addition, through the inclined setting of the sliding direction of the slider 8.3.1, it is convenient for the telescopic rod 7 to apply a force to the annular bead 5 through the connecting unit 8, and the first rod 8.1 and the second rod 8.2 are stably fixed.

[0034] In one embodiment, refer to Figure 4 , an elastic member 9 made of an elastic material such as a spring is installed between the annular bead 5 and the upper mold 3. Each elastic member 9 is annularly distributed along the axis of the annular bead 5. When the first rod 8.1 can slide relative to the second rod 8.2, through the operation of the hydraulic cylinder 2, the upper mold 3 is driven to move. The upper mold 3 is movably connected to the annular bead 5 through the elastic member 9, thereby driving the annular bead 5 to move. When the first rod 8.1 is fixed relative to the second rod 8.2, through the change in the length of the telescopic rod 7, the annular bead 5 is moved, thereby adjusting the distance between the annular bead 5 and the lower mold 4, and the angle between the annular bead 5 and the horizontal plane, so as to form a structure for adjusting the distance between the annular bead 5 and the lower mold 4 through the hydraulic cylinder 2 or the telescopic rod 7.

[0035] Among them, the telescopic rod 7 in each embodiment is a suitable component such as an oil cylinder. The telescopic rods 7 are annularly distributed around the axis of the hydraulic cylinder 2, and the number of telescopic rods 7 is a suitable number such as ten, twelve, etc.

[0036] The present invention has been described in detail above through specific embodiments and examples, but these do not constitute a limitation to the present invention. Without departing from the principle of the present invention, those skilled in the art can also make many deformations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. A head end hydraulic press, comprising a mounting frame (1), a hydraulic cylinder (2) mounted on the mounting frame (1), an upper mold (3) mounted on one end of the hydraulic cylinder (2), a lower mold (4) mounted on the mounting frame (1) below the upper mold (3), characterized in that: The mounting frame (1) is provided with an annular pressing edge (5) at the outer peripheral side of the upper mold (3); the distance between the annular pressing edge (5) and the lower mold (4) is adjustable, and the angle between the annular pressing edge (5) and the horizontal plane is adjustable.

2. A head end hydraulic press according to claim 1, characterized in that: The annular pressing edge (5) is sleeved on the upper mold (3), the annular pressing edge (5) is rotatably connected to the movable end of the telescopic rod (7), the mounting frame (1) is slidably connected to the fixed end of the telescopic rod (7), the sliding direction of each telescopic rod (7) relative to the mounting frame (1) is outward along the axis of the hydraulic cylinder (2), and each telescopic rod (7) is arranged in a vertical direction.

3. The end cap hydraulic press according to claim 1, characterized in that: The annular pressing edge (5) is sleeved on the upper mold (3), the annular pressing edge (5) is rotatably connected to the movable end of the telescopic rod (7), and the mounting frame (1) is rotatably connected to the fixed end of the telescopic rod (7).

4. The end cap hydraulic press according to claim 1, characterized in that: The annular edge pressing (5) is movably connected to the upper mold (3), the mounting frame (1) is rotatably connected to the fixed end of the telescopic rod (7), and a length-adjustable connection unit (8) is installed between the movable end of each telescopic rod (7) and the annular edge pressing (5), forming a structure for adjusting the distance between the annular edge pressing (5) and the lower mold (4) by means of a hydraulic cylinder (2) or a telescopic rod (7).

5. The end cap hydraulic press according to claim 1, characterized in that: The mounting frame (1) comprises an upper beam seat (1.1) and a lower beam seat (1.2); the upper beam seat (1.1) and the lower beam seat (1.2) are fixedly connected via a support rod (1.3); the upper beam seat (1.1) is fixedly connected to a hydraulic cylinder (2); a lower mold (4) is mounted on the lower beam seat (1.2); and a top cylinder (10) is mounted on the lower beam seat (1.2) below the lower mold (4).

6. The end cap hydraulic press according to claim 1, characterized in that: The annular edge pressing (5) comprises an edge pressing reinforcement ring (5.1) and a lower edge pressing (5.2); the edge pressing reinforcement ring (5.1) is rotatably connected to the telescopic rod (7); the lower edge pressing (5.2) is fixedly connected to the edge pressing reinforcement ring (5.1); and the lower edge pressing (5.2) is located below the edge pressing reinforcement ring (5.1).

7. The end cap hydraulic press according to claim 2, characterized in that: The mounting frame (1) is fixedly connected to a drive motor (6), the output shaft of each drive motor (6) is fixedly connected to a lead screw, each lead screw is threadedly connected to a nut block, and each nut block is fixedly connected to a fixed end of a telescopic rod (7).

8. The end cap hydraulic press according to claim 4, characterized in that: The connecting unit (8) comprises a first rod (8.1) and a second rod (8.2), each of the first rods (8.1) is slidably connected to the second rod (8.2), a stopper (8.3) for fixing the first rod (8.1) and the second rod (8.2) is installed at the connection between the first rod (8.1) and the second rod (8.2), each of the first rods (8.1) is fixedly connected to the movable end of the telescopic rod (7), and each of the second rods (8.2) is rotatably connected to the annular pressure edge (5).

9. The end cap hydraulic press according to claim 8, characterized in that: The position-limiting member (8.3) comprises a slider (8.3.1), each of the sliders (8.3.1) is slidably connected to the first rod (8.1), each of the sliders (8.3.1) is located at both sides of the axis of the first rod (8.1), each of the first rods (8.1) is sleeved on the second rod (8.2), each of the sliders (8.3.1) is inclined outwardly in the direction from the first rod (8.1) to the second rod (8.2) relative to the sliding direction of the first rod (8.1), and an adjusting rod (8.3.2) with adjustable length is installed between each of the sliders (8.3.1).

10. The end cap hydraulic press according to claim 4, characterized in that: An elastic member (9) made of elastic material is installed between the annular pressing edge (5) and the upper mold (3), and each of the elastic members (9) is distributed in an annular shape along the axis of the annular pressing edge (5).

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