CN-121989044-A - Anti-seizing machine die for processing short U-shaped bent pipe of air conditioner

CN121989044ACN 121989044 ACN121989044 ACN 121989044ACN-121989044-A

Abstract

The invention relates to the technical field of pipe fitting processing, and discloses an anti-seizing machine die for air conditioner short U-bend processing, which aims to solve the technical problem that a bent pipe is easy to seize with the die in the existing air conditioner short U-bend processing, and comprises a machine tool, wherein five sections of material conveying paths and material conveying components are arranged on the machine tool, a first motor drives a propelling wheel to rotate, and a straight pipe is conveyed by a synchronous belt wheel and a synchronous crawler belt in linkage with a fixed wheel; the output end of the machine tool is provided with a bent pipe component, a second motor controls the mandrel to stretch and insert into the straight pipe to prevent collapse, a third motor drives the rotating part to bend the pipe, a pawl is linked with the ratchet plate, the barrel cam and the reciprocating rod during reversing, so that the ejector rod is ejected out and the mold is opened to prevent clamping, and a cutting component is also provided, the hydraulic pump and the fourth motor drive the cutting machine to cut, and the finished product is conveyed through a slideway. The invention realizes automatic processing of the short U-shaped bent pipe, effectively avoids machine clamping, ensures processing precision, and improves batch processing efficiency and equipment operation stability.

Inventors

ZHOU HONG
JIANG YAN
RAO JIAN

Assignees

武汉宏海科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260304

Claims (10)

1. The anti-seize machine die for air conditioner short U-bend processing is characterized by comprising a machine tool and a bend mechanism arranged at the output end side of the machine tool; The pipe bending mechanism comprises fixing parts at two ends, a third motor arranged at one side of the fixing parts, a rotating part in driving connection with the third motor, and a die assembly assembled between the two fixing parts; The die assembly comprises a first pipe bending die, a second pipe bending die, a fourth pipe bending die and a third pipe bending die, wherein the second pipe bending die and the fourth pipe bending die are symmetrically arranged on the inner side of the first pipe bending die, the third pipe bending die is clamped between the second pipe bending die and the fourth pipe bending die, columnar protruding parts are arranged on one sides of the second pipe bending die and the fourth pipe bending die, which face the third pipe bending die, column-shaped penetrating grooves are formed in the positions, corresponding to the columnar protruding parts, of the third pipe bending die, and compression springs embedded into the column-shaped penetrating grooves are sleeved on the outer sides of the columnar protruding parts; A ratchet plate matched with the rotating part is arranged on one side of the fixing part, a fixing plate is connected to one side of the ratchet plate, facing towards the die assembly, of the fixing plate, a cylindrical cam with a closed curve chute at the periphery is coaxially fixed to one side, far away from the ratchet plate, of the fixing plate, a driven part is embedded in the curve chute in a sliding manner, and one end, far away from the cylindrical cam, of the driven part is connected with a reciprocating rod penetrating through the middle part of each bent pipe die; An ejector rod is embedded between the second pipe bending die and the fourth pipe bending die, the ejector rod comprises an ejector section and a limiting section, and a connecting rod structure is further connected between the second pipe bending die and the fourth pipe bending die; When the third motor drives the rotating part to rotate reversely, the rotating part is meshed with the ratchet disc and drives the barrel cam to rotate, the driven part moves along the curve chute and drives the reciprocating rod to move, so that the ejector section of the ejector rod pushes the bent pipe synchronously, and the second bending pipe die and the fourth bending pipe die are opened relatively along the third bending pipe die.
2. The anti-seizing machine die for air conditioner short U bend processing of claim 1, wherein said machine tool is provided with a feeding mechanism arranged along the straight pipe conveying direction, said feeding mechanism comprises a first motor, a synchronous belt wheel connected with the output shaft of the first motor, a fixed wheel and a propelling wheel which are linked by a synchronous track.
3. The anti-seizing machine die for air conditioner short U bend processing as set forth in claim 1, wherein two pulling rods of the connecting rod structure are respectively connected with the second bend die and the fourth bend die, one end of the limiting rod is adapted to the side edge of the reciprocating rod, and the other end of the limiting rod is connected with the ends of the two pulling rods.
4. The anti-seizing machine die for air conditioner short U pipe bending process of claim 1, wherein the pipe bending mechanism further comprises a telescopic block, a core rod is embedded in the telescopic block, a telescopic spring is connected to the tail end of the core rod, a second motor for driving the core rod to stretch is installed on one side of the telescopic block, and an output end of the second motor is connected with a telescopic strip.
5. The anti-seize machine die for air conditioner short U bend processing as set forth in claim 4, wherein the first protruding portion is processed in the core rod, the second protruding portion is processed in the corresponding position of the telescopic bar, and the telescopic bar is driven by the second motor to achieve telescopic operation of the core rod through contact between the first protruding portion and the second protruding portion.
6. The anti-seizing machine die for air conditioner short U bend processing as set forth in claim 1, wherein the ejector rod has an arc-shaped ejector section, the end of the limit section is spherical, and the reciprocating rod is provided with a wavy driving surface corresponding to the limit section.
7. The anti-seizing machine die for air conditioner short U bend processing as set forth in claim 1, wherein the curved runner of the barrel cam is of a closed annular structure, and the end of the driven part is provided with a slider adapted to the curved runner.
8. The anti-seizing machine die for air conditioner short U bend processing of claim 1, wherein a cutting assembly is arranged below the output end of the machine tool, the cutting assembly comprises a hydraulic pump, a fixing piece connected with the hydraulic pump, the fixing piece is T-shaped, sliding rods are arranged in the middle of two protruding parts of the fixing piece, and a fourth motor is arranged on the fixing piece on one side of the sliding rods.
9. The anti-seize machine die for air conditioner short U bend processing of claim 1, wherein a slide way is arranged under the bend pipe mechanism, connecting rods are arranged on two sides of the slide way, and the connecting rods are connected with a fixing part.
10. The anti-seizing machine die for air conditioner short U bend processing as set forth in claim 1, wherein the telescopic block is driven by a third motor to rotate 180 ° around the die assembly, and the fixed block only triggers the second and fourth dies to push out relative to the ejector rod when rotating in the anticlockwise direction.

Description

Anti-seizing machine die for processing short U-shaped bent pipe of air conditioner Technical Field The invention relates to the technical field of pipe fitting processing, in particular to an anti-seizing machine die for air conditioner short U-bend processing. Background The short U-shaped bend pipe of the air conditioner is used as a core connecting pipe fitting of an air conditioner condenser and an evaporator, the structural integrity and the dimensional accuracy of the short U-shaped bend pipe of the air conditioner determine the fluid circulation efficiency and the tightness of an air conditioner heat exchange system, and the short U-shaped bend pipe of the air conditioner occupies an important position in the technical field of pipe fitting processing. With the development of miniaturization and high efficiency in the air conditioner industry, the processing demand for the short U-shaped bent pipe of the air conditioner is growing. At present, the processing of the short U-shaped bent pipe of the air conditioner is gradually developed into the processing of full-automatic bent pipe equipment based on a mold from early manual bent pipe and semi-automatic bent pipe, the existing full-automatic bent pipe equipment generally comprises a material conveying mechanism, a bent pipe mold and a driving mechanism, the material conveying mechanism realizes continuous conveying of a straight pipe through rollers or tracks, the bent pipe mold is provided with a cavity matched with the short U-shaped bent pipe, and the driving mechanism drives the straight pipe to be attached to the cavity to complete 180-degree bending molding. However, the existing full-automatic pipe bending equipment still has the remarkable technical defects that the pipe diameter of the air conditioner short U-shaped pipe is small, the bending radius is fixed, the pipe wall of the formed pipe is easy to generate larger static friction force with the inner wall of a die cavity due to the fact that the pipe wall of the formed pipe is attached and too tightly pressed, the existing pipe bending die is of an integral or semi-open type fixed structure, and an active detachment linkage mechanism for the short U-shaped pipe is lacked, so that the pipe is extremely easy to clamp in the die cavity after the pipe bending is completed. Once the machine is blocked, the machine is stopped manually and the mould is disassembled to take out the bent pipe, so that the production flow is directly interrupted, the mass production efficiency is reduced, the deformation of the bent pipe and the abrasion of the mould cavity are possibly caused by forced disassembly, the subsequent processing precision is influenced, the probability of equipment failure is increased due to frequent machine blocking, the production continuity and stability cannot be ensured, and the high-efficiency and stable processing requirement of the air conditioner industry on the short U-shaped bent pipe is difficult to meet. Disclosure of Invention The invention aims to overcome the defects in the prior art, and provides an anti-seizing machine die for processing an air conditioner short U-bend. In order to achieve the aim, the application adopts the following technical scheme that the anti-seize machine die for processing the short U-shaped bent pipe of the air conditioner comprises a machine tool and a bent pipe mechanism arranged at the output end side of the machine tool; the pipe bending mechanism comprises fixing parts at two ends, a third motor arranged at one side of the fixing parts, a rotating part in driving connection with the third motor, and a die assembly assembled between the fixing parts, wherein the die assembly comprises a first pipe bending die, a second pipe bending die and a fourth pipe bending die which are symmetrically arranged at the inner side of the first pipe bending die, and a third pipe bending die which is clamped between the second pipe bending die and the fourth pipe bending die, one sides of the second pipe bending die and the fourth pipe bending die, which face the third pipe bending die, are respectively provided with a columnar protruding part, a columnar penetrating groove is formed at the position, corresponding to the columnar protruding part, of the third pipe bending die, a compression spring embedded in the columnar penetrating groove is sleeved at the outer side of the columnar protruding part, one side of the fixing part is provided with a ratchet disc matched with the rotating part, one side of the ratchet disc, which faces the die assembly, a fixed disc is connected with one side of the fixed disc, which is far away from the ratchet disc, is coaxially fixed with a cylindrical cam with a closed curve chute, a driven part is embedded in the curve chute, one end, which is far away from the cylindrical cam, is connected with a reciprocating rod penetrating the middle part of each pipe bending die, a push rod is embedded between the second pipe ben