阅读说明：本技术 一种管材快速内压胀形设备 (Quick internal pressure bulging equipment for pipes ) 是由 何祝斌 梁江凯 冷林威 林艳丽 苑世剑 于 2020-06-15 设计创作，主要内容包括：本发明提供了一种管材快速内压胀形设备。本发明为解决现有管材内压胀形设备的合模和密封动作相对独立、管端密封需要采用水平油缸及液压系统,导致设备工作节拍慢、控制复杂、成本高的问题。压力机上滑块带动上模具、上端左右楔形块、连接板、连接杆和弹簧等一起下移,上模具首先与下模具接触并通过连接板压缩弹簧使上模具受到一定合模力。然后,左右楔形块将与左右密封冲头接触并使其向管端移动,从而实现密封和补料动作。在进行密封和补料的同时或之后,向管坯内部通入高压介质,实现管坯的内压胀形。该设备只需利用驱动缸带动上模具及楔形块等一起动作,即可完成合模、密封及补料等多个动作。本发明用于管材的内压胀形。(The invention provides a quick internal pressure bulging device for pipes. The invention aims to solve the problems of slow working rhythm, complex control and high cost of the existing pipe internal pressure bulging equipment due to relatively independent die assembly and sealing actions and the fact that a horizontal oil cylinder and a hydraulic system are needed for pipe end sealing. The upper slide block of the press drives the upper die, the left and right wedge-shaped blocks at the upper end, the connecting plate, the connecting rod, the spring and the like to move downwards together, and the upper die is firstly contacted with the lower die and is enabled to bear certain die closing force by compressing the spring through the connecting plate. Then, the wedge blocks will contact with the sealing punches and move them towards the pipe end, thus realizing the sealing and feeding actions. And introducing a high-pressure medium into the pipe blank while or after sealing and supplementing, so as to realize the internal pressure bulging of the pipe blank. The equipment can complete a plurality of actions such as die assembly, sealing, material supplementing and the like only by utilizing the driving cylinder to drive the upper die, the wedge block and the like to act together. The invention is used for the internal pressure bulging of the pipe.)

1. The quick internal pressure bulging equipment for the pipe is characterized by comprising the pipe (1), a lower die (2), an upper die (3), a left sealing punch (4), a right sealing punch (5), an upper end left wedge-shaped block (6-1), a lower end left wedge-shaped block (6-2), an upper end right wedge-shaped block (7-1), a lower end right wedge-shaped block (7-2), a connecting plate (8), a press upper sliding block (9), a connecting rod (10-1), a connecting rod (10-2), a hydraulic spring (11-1), a hydraulic spring (11-2) force transmission block (12), a driving cylinder (13), a stand column (14), an upper cross beam (15), a lower base (16), a high pressure source (17), a high pressure pipeline (18), a heater (19), a cable (20), a control system (21), A hinge mechanism (22) and a fixed block (23);

the force transmission block (12) is fixed on the upper surface of the upper die (3), and when the upper die (3) is contacted with the lower die (2), the connecting plate (8) compresses the hydraulic spring (11-1) to generate a certain mold closing force until the connecting plate (8) is contacted with the force transmission block (12) to realize mold closing;

the upper end left wedge-shaped block (6-1) and the upper end right wedge-shaped block (7-1) are respectively and fixedly connected with the lower surface of the connecting plate (8), and an upper slide block (9) of the press machine drives the upper end left wedge-shaped block (6-1) and the upper end right wedge-shaped block (7-1) to vertically move downwards, so that the lower end left wedge-shaped block (6-2) and the lower end right wedge-shaped block (7-2) move in the horizontal direction;

the upper die (3), the hydraulic spring (11-1) and the connecting plate (8) are connected with an upper slide block (9) of the press machine through a plurality of connecting rods (10-1), and the upper slide block (9) of the press machine drives the upper die (3), the upper-end left wedge-shaped block (6-1), the upper-end right wedge-shaped block (7-1), the connecting plate (8), the connecting rod (10-1) and the hydraulic spring (11-1) to move downwards together;

the lower die (2) is fixed on the table board of the press machine, and when the press machine is closed, the die cavity is the outline of the formed pipe blank;

the lower end left wedge-shaped block (6-2) and the lower end right wedge-shaped block (7-2) are connected with the side face of the lower die (2) through a connecting rod (10-2), a hydraulic spring (11-2) is arranged on the connecting rod (10-2) between the lower end left wedge-shaped block (6-2), the lower end right wedge-shaped block (7-2) and the lower die (2), and when an upper slide block (9) of a press machine drives the upper end left wedge-shaped block (6-1) and the upper end right wedge-shaped block (7-1) to move upwards, the lower end left wedge-shaped block (6-2) and the lower end right wedge-shaped block (7-2) move reversely in the axial direction under the action of the hydraulic spring (11-2);

the left sealing punch head (4) and the right sealing punch head (5) are respectively fixed on a lower end left wedge-shaped block (6-2) and a lower end right wedge-shaped block (7-2), and the lower end left wedge-shaped block (6-2) and the lower end right wedge-shaped block (7-2) respectively drive the left sealing punch head (4) and the right sealing punch head (5) to move along the axial direction;

the limiting blocks 24 are fixed on the table top of the press machine and positioned at two sides of the lower end wedge block for controlling the maximum displacement of the lower end wedge block;

a pipeline outlet of a high-pressure source (17) of the pressure system is communicated with a pressure medium inlet of the left sealing punch (4), when the die is closed and sealed, pressure medium is introduced, and the pipe (1) is attached to a die cavity of the die under the action of the pressure medium;

the upper cross beam (15) is fixedly connected with the lower base (16) through an upright post (14), the upper cross beam (15) is used for fixing the driving cylinder (13), and the lower base (16) is used for fixing the table top of the press machine;

the control system (21) is respectively connected with the high-pressure source (17), the heater (19) and the driving cylinder (13) and is used for controlling the pressure in the pipe (1), the heating temperature of the pipe (1) and the clamping force of the press.

2. The apparatus for rapid internal pressure bulging of a pipe according to claim 1,

the hydraulic spring (11-2) is replaced by a spiral spring (25), and the spiral spring (25) is arranged between the lower end wedge block and the lower die (2) and used for realizing automatic resetting of the lower end wedge block during die parting of the die.

3. The rapid internal pipe bulging apparatus according to claim 1 or 2,

the upper end left wedge-shaped block (6-1) and the upper end right wedge-shaped block (7-1) are replaced by fixed blocks (23), and hinge mechanisms (22) are arranged on two sides of the lower end left wedge-shaped block (6-2) and the lower end right wedge-shaped block (7-2).

Technical Field

The invention relates to pipe internal-pressure bulging equipment, in particular to equipment capable of realizing quick internal-pressure bulging of a pipe.

Background

The pipe internal pressure bulging refers to a forming technology for filling a die cavity with a pipe under the combined action of internal pressure and axial thrust and attaching a die to the pipe so as to form a hollow thin-wall part with a certain complex profile. The technology is particularly suitable for forming integral, complex and thin-walled hollow parts, has high forming precision, high material utilization rate and low production cost, is rapidly developed in the early century, and starts to be widely applied to industries such as aerospace, automobile manufacturing and the like.

At present, the main flow of forming hollow parts by common hydraulic forming equipment is as follows: firstly, placing a tube blank into a forming lower die, and then driving the forming upper die to lock a die by using a vertical press; a piston of the horizontal hydraulic cylinder moves in the horizontal direction to drive the sealing punch to abut against a port of a pipe blank to realize sealing, and meanwhile, a high-pressure medium is injected into the pipe blank from a high-pressure source to increase the pressure in the pipe blank, so that the matching relation between the internal pressure and the axial feeding amount is controlled, and the pipe blank can be expanded to form a part with the same shape as the inner shape of a die cavity.

The axial movement of the sealing punch of the hydraulic forming equipment needs a special horizontal oil cylinder and a hydraulic system, and has large floor area, high consumption cost and complex control; and the die assembly and the pipe end sealing are independent and have a longer time interval, so that the working beat of the equipment is slow, and the production efficiency is greatly reduced. If the sealing punch is contacted with the pipe end when the die is not completely closed, the pipe blank is compressed in the axial direction and is buckled; if the punch is moved after the die is completely closed, the distance that the punch can move is small, and the method is only suitable for the condition that the feeding is not needed or is small.

The problems that the working beat of the equipment is slow, the control is complex and the cost is high due to the fact that a die assembly action and a pipe end sealing action of the conventional pipe internal pressure bulging equipment are relatively independent and a long time interval exists between the two actions, and a special horizontal oil cylinder and a hydraulic system are needed for pipe end sealing are adopted, are solved, and the pipe internal pressure bulging equipment is provided.

Disclosure of Invention

The invention aims to solve the problems that the conventional pipe internal pressure bulging equipment is slow in working beat, complex in control and high in cost due to the fact that die assembly and pipe end sealing actions of the conventional pipe internal pressure bulging equipment are relatively independent, a long time interval exists between the two actions, and a special horizontal oil cylinder and a hydraulic system are needed for pipe end sealing, and further provides the pipe internal pressure bulging equipment.

The technical scheme of the invention is as follows:

a quick internal pressure bulging device for pipes comprises a pipe 1, a lower die 2, an upper die 3, a left sealing punch 4, a right sealing punch 5, an upper end left wedge-shaped block 6-1, a lower end left wedge-shaped block 6-2, an upper end right wedge-shaped block 7-1, a lower end right wedge-shaped block 7-2, a connecting plate 8, a press machine upper slide block 9, a connecting rod 10-1, a connecting rod 10-2, a hydraulic spring 11-1, a hydraulic spring 11-2, a force transmission block 12, a driving cylinder 13, a stand column 14, an upper cross beam 15, a lower base 16, a high pressure source 17, a high pressure pipeline 18, a heater 19, a cable 20, a control system 21, a hinge mechanism 22, a fixing block 23, a limiting block 24 and a spiral spring 25;

the force transfer block 12 is fixed on the upper surface of the upper die 3, and when the upper die 3 is contacted with the lower die 2, the connecting plate 8 compresses the hydraulic spring 11-1 to generate a certain mold closing force until the connecting plate 8 is contacted with the force transfer block 12 to realize mold closing;

the upper left wedge-shaped block 6-1 and the upper right wedge-shaped block 7-1 are respectively and fixedly connected with the lower surface of the connecting plate 8, and an upper slide block 9 of the press machine drives the upper left wedge-shaped block 6-1 and the upper right wedge-shaped block 7-1 to vertically move downwards, so that the lower left wedge-shaped block 6-2 and the lower right wedge-shaped block 7-2 generate horizontal movement;

the upper die 3, the hydraulic spring 11-1 and the connecting plate 8 are connected with an upper slide block 9 of a press machine through a plurality of connecting rods 10-1, and the upper slide block 9 of the press machine drives the upper die 3, the upper left wedge-shaped block 6-1, the upper right wedge-shaped block 7-1, the connecting plate 8, the connecting rod 10-1 and the hydraulic spring 11-1 to move downwards together;

the hydraulic spring 11-2 is replaced by a spiral spring 25, and the spiral spring 25 is arranged between the lower end wedge block 7 and the lower die 2 and used for realizing automatic reset of the lower end wedge block 7 during die parting of the die;

the lower die 2 is fixed on the table board of the press, and when the press is closed, the die cavity is the outline of the formed pipe blank;

the lower end left wedge block 6-2 and the lower end right wedge block 7-2 are connected with the side face of the lower die 2 through a connecting rod 10-2, a hydraulic spring 11-2 is arranged on the connecting rod 10-2 between the lower end left wedge block 6-2, the lower end right wedge block 7-2 and the lower die 2, and when an upper slide block 9 of the press machine drives the upper end left wedge block 6-1 and the upper end right wedge block 7-1 to move upwards, the lower end left wedge block 6-2 and the lower end right wedge block 7-2 move reversely in the axial direction under the action of the hydraulic spring 11-2;

the left sealing punch 4 and the right sealing punch 5 are respectively fixed on a lower end left wedge-shaped block 6-2 and a lower end right wedge-shaped block 7-2, and the lower end left wedge-shaped block 6-2 and the lower end right wedge-shaped block 7-2 respectively drive the left sealing punch 4 and the right sealing punch 5 to move axially;

the limiting blocks 24 are fixed on the table top of the press machine and positioned at two sides of the lower end wedge block for controlling the maximum displacement of the lower end wedge block;

the upper end left wedge-shaped block 6-1 and the upper end right wedge-shaped block 7-1 are replaced by a fixed block 23, and hinge mechanisms 22 are arranged on two sides of the lower end left wedge-shaped block 6-2 and the lower end right wedge-shaped block 7-2;

a pipeline outlet of a high-pressure source 17 of the pressure system is communicated with a pressure medium inlet of the left sealing punch 4, when the die is closed and sealed, pressure medium is introduced, and the pipe 1 is attached to a die cavity under the action of the pressure medium;

the upper beam 15 is fixedly connected with the lower base 16 through the upright posts 14, the upper beam 15 is used for fixing the driving cylinder 13, and the lower base 16 is used for fixing the table top of the press machine;

the control system 21 is respectively connected with the high pressure source 17, the heater 19 and the driving cylinder 13 and is used for controlling the pressure in the pipe 1, the heating temperature of the pipe 1 and the magnitude of the clamping force of the press.

The invention has the beneficial effects that:

according to the rapid pipe internal-pressing bulging equipment, in the descending process of the upper sliding block of the press machine, the sealing punch is pushed in the horizontal direction through the wedge-shaped block structure, so that the end part of a pipe is rapidly sealed, and the pipe with a certain length can be pushed to a die cavity. In the whole forming process, the sealing and axial pushing of the end part of the pipe do not need manual operation and adjustment, and the forming machine is safe and reliable and has good repeatability.

In the rapid internal pressure bulging equipment for the pipe, the end part of the pipe is sealed and the material is pushed axially by adopting the wedge-shaped block structure in the descending process of the sliding block on the press machine, a special horizontal oil cylinder and a hydraulic system are not required to be adopted for driving the punch, the equipment and the die structure can be obviously simplified, and the equipment and the die cost are reduced.

In the rapid internal pressure bulging equipment for the pipe, in the descending process of the upper sliding block of the press machine, the elastic connecting structure with adjustable pressure and displacement is arranged between the sliding block and the upper die, the pressing plate with adjustable height and angle is arranged on the outer side of the sliding block, and the inclined wedge structure with adjustable horizontal position and angle is connected to the punch, so that the actions of die assembly, pipe end sealing, axial material pushing and the like can be automatically completed in the descending process of the upper sliding block of the press machine, the actions are coherent and compact, the production efficiency is high, the adjustable range of each unit is large, and the forming of different types of pipe fittings can be completed by one set of die tool.

In the quick pipe internal-pressing bulging equipment, in the upward moving process of the upper sliding block of the press machine, the wedge block drives the sealing punch to move reversely along the axial direction through the spring mechanism between the wedge block and the lower die, so that the sealing punch and the pipe can be separated simultaneously when the die is separated, the structure is simple, the use is convenient, and the production efficiency is greatly improved.

Drawings

Fig. 1 is a schematic view of a rapid internal pressure bulging apparatus for pipes according to the present invention.

Fig. 2 shows the main working process of the rapid internal pressure bulging equipment for pipes, wherein (a) is in a die assembly state, and (b) is in a sealing state.

Fig. 3 is a schematic view of a rapid internal pressure bulging apparatus for sealing by driving a punch through a hinge mechanism according to a fifth embodiment of the present invention.

Fig. 4 shows the main operation processes of a rapid internal pressure bulging apparatus for sealing by driving a punch via a hinge mechanism according to a fifth embodiment of the present invention, where (a) is in a mold closing state and (b) is in a sealing state.

Fig. 5 is a schematic view of a rapid internal bulging apparatus for realizing a seal punch reset by using a coil spring mechanism according to a sixth embodiment of the present invention.

Fig. 6 shows the main operation processes of a rapid internal-pressure bulging apparatus for restoring a sealing punch by using a coil spring mechanism according to a sixth embodiment of the present invention, where (a) is a mold closing state and (b) is a sealing state.

Detailed Description