A punch cylinder

Abstract

A punch cylinder, including: guide system, cylinder shell, connecting rod force increasing mechanism, die assembly and air inlet, guide system is connected with the inside of cylinder shell, connecting rod force increasing mechanism is connected with guide system, die assembly is connected with connecting rod force increasing mechanism, air inlet is connected with the bottom of cylinder shell, wherein: connecting rod force increasing mechanism includes: piston rod, connecting block, clamping arm and piston, compared with the traditional technology, by adding connecting rod force increasing mechanism, successfully 0.6MPa compressed air provides 7kN thrust conversion punch position up to 20kN of stamping force, make its performance index close to the level of traditional hydraulic system, and install guide system, ensure the straightness of piston rod operation, the punching precision error is strictly controlled within 0.1 millimeter, greatly improve the stability of processing quality.

Description

Technical Field

[0001] This utility model relates to the field of cylinder technology, specifically to a punching cylinder. Background Technology

[0002] In modern industrial production, punching is a fundamental process, and its technological level directly affects product quality and production efficiency. For a long time, the industrial sector has primarily relied on three types of punching technologies, but each has its own significant technological bottlenecks.

[0003] Traditional mechanical punch presses use crank-connecting rod or cam-driven mechanisms, which, while providing stable punching force, not only occupy a large amount of space due to their large size and complex mechanical structure, but also result in a severe lack of equipment flexibility. In actual production, each die change requires machine downtime for tedious adjustments, making them completely unsuitable for the flexible production demands of modern manufacturing. Even more seriously, the mechanical wear caused by high-speed operation significantly increases maintenance costs, placing a heavy operational burden on enterprises.

[0004] Hydraulic punching systems, as another mainstream solution, do indeed enable high-tonnage stamping operations by driving the punch with high-pressure oil supplied by a hydraulic pump station. However, the inherent compressibility of hydraulic oil and pipeline transmission delays make it difficult to improve system response speed. In fields such as automobile manufacturing, where strict production cycle requirements are necessary, such speed is clearly insufficient. Furthermore, hydraulic systems always face the risk of oil leakage, which not only pollutes the working environment but also increases additional cleaning and maintenance costs. More importantly, the continuous operation of the hydraulic pump station results in staggering energy consumption, a problem that is particularly prominent in today's increasingly stringent environmental regulations.

[0005] While early pneumatic punching devices were simple in structure and responded quickly, their punching pressure was limited to no more than 0.7 MPa due to the constraint of the air source pressure. This restricted their application to low-load scenarios such as punching thin plates. In practical use, fluctuations in air pressure directly led to inconsistent punching depths, severely impacting processing quality and often requiring additional deburring processes to compensate for precision defects. These technical limitations make traditional punching solutions increasingly unable to meet the demands of modern intelligent manufacturing for high efficiency, high precision, and flexible production.

[0006] To address the aforementioned issues, we have made a series of improvements. Utility Model Content

[0007] The purpose of this invention is to provide a punching cylinder to overcome the aforementioned shortcomings and deficiencies of the prior art.

[0008] A punching cylinder includes: a guide system, a cylinder housing, a connecting rod force amplification mechanism, a punching die assembly, and an air inlet. The guide system is connected to the inside of the cylinder housing, the connecting rod force amplification mechanism is connected to the guide system, the punching die assembly is connected to the connecting rod force amplification mechanism, and the air inlet is connected to the bottom of the cylinder housing.

[0009] The connecting rod force amplification mechanism includes a piston rod, a connecting block, a clamping arm, and a piston. The piston rod and piston are internally connected to the guide system. The piston is connected to the bottom of the piston rod. The connecting block is connected to the upper part of the piston rod. The clamping arm is connected to the connecting block and the upper end of the cylinder shell. The piston rod is made of chrome-plated material.

[0010] Furthermore, the guiding system includes a guide ring and a guide groove. The guide ring is located at the upper end of the cylinder housing cover, and the guide groove is located at the upper part of the cylinder housing. The guide ring and the guide groove are movably connected to the piston rod.

[0011] The beneficial effects of this utility model are:

[0012] Compared with traditional technology, this utility model successfully converts the 7kN thrust provided by 0.6MPa compressed air into a punching force of up to 20kN at the punch position by adding a connecting rod force amplification mechanism, making its performance indicators close to the level of traditional hydraulic systems. In addition, a guiding system is added to ensure the straightness of the piston rod operation, strictly controlling the punching accuracy error within 0.1 mm, and significantly improving the stability of processing quality. Attached image description:

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure label:

[0015] The guide system 100, guide ring 110 and guide groove 120.

[0016] The cylinder housing 200, connecting rod force amplification mechanism 300, piston rod 310, connecting block 320, clamping arm 330, piston 340, punching die assembly 400, and air inlet 500. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments. It should be understood that the following embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0018] Example 1

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] like Figure 1As shown, a punching cylinder includes: a guide system 100, a cylinder housing 200, a connecting rod force amplification mechanism 300, a punching die assembly 400, and an air inlet 500. The guide system 100 is internally connected to the cylinder housing 200, the connecting rod force amplification mechanism 300 is connected to the guide system 100, the punching die assembly 400 is connected to the connecting rod force amplification mechanism 300, and the air inlet 500 is connected to the bottom of the cylinder housing 200.

[0021] The connecting rod force amplification mechanism 300 includes a piston rod 310, a connecting block 320, a clamping arm 330, and a piston 340. The piston rod 310 and the piston 340 are internally connected to the guide system 100. The piston 340 is connected to the bottom of the piston rod 310. The connecting block 320 is connected to the upper part of the piston rod 310. The clamping arm 330 is connected to the connecting block 320 and the upper end of the cylinder housing 200. The piston rod 310 is made of chrome-plated material.

[0022] The guiding system 100 includes a guide ring 110 and a guide groove 120. The guide ring 110 is located at the upper end of the cylinder housing 200, and the guide groove 120 is located at the upper part of the cylinder housing 200. The guide ring 110 and the guide groove 120 are movably connected to the piston rod 310.

[0023] The principle of this invention is as follows: When compressed air enters the cylinder housing 200 through the air inlet 500, it first pushes the piston 340 upward. The piston 340 is connected to the bottom of the piston rod 310, converting the air pressure into an initial thrust F0. Under the precise guidance of the guide system 100, the piston rod 310 maintains a high degree of linearity, wherein the guide ring 110 and the guide groove 120 ensure that the piston rod's running accuracy error is controlled within 0.1 mm.

[0024] The piston rod 310 moves upward, causing the connecting block 320 connected to the upper part to move. The connecting block 320 forms a linkage force amplification mechanism 300 through the clamping arm 330. According to the force amplification principle of the linkage mechanism, when the opening angle α of the clamping arm decreases, the impact force F output by the clamping arm will increase significantly while the initial force F0 remains unchanged. This ingenious mechanical structure design enables the system to convert the initial thrust of 7kN generated by 0.6MPa compressed air into an impact force of up to 20kN, greatly breaking through the power bottleneck of traditional pneumatic systems.

[0025] Ultimately, the enhanced punching force is precisely transmitted to the workpiece through the die assembly 400, completing the high-precision punching operation. The chrome-plated piston rod 310, in conjunction with the hard-anodized cylinder shell 200, significantly improves the wear resistance and service life of the equipment, extending the overall machine lifespan to over 3 million cycles. The modularly designed die assembly 400 can be quickly replaced according to different needs, enabling efficient and flexible production and meeting the comprehensive requirements of modern intelligent manufacturing for high efficiency, high precision, and flexible production.

[0026] This invention successfully converts the 7kN thrust provided by 0.6MPa compressed air into a punching force of up to 20kN at the punch position by adding a connecting rod force amplification mechanism, making its performance indicators close to the level of traditional hydraulic systems. In addition, a guiding system is added to ensure the straightness of the piston rod operation, strictly controlling the punching accuracy error within 0.1 mm, and greatly improving the stability of processing quality.

[0027] The specific embodiments of this utility model have been described above, but this utility model is not limited thereto. Various changes can be made to this utility model as long as they do not depart from its spirit.

Claims

1. A punching cylinder, characterized in that, include: The cylinder housing (200), connecting rod force amplification mechanism (300), die assembly (400), and air inlet (500) are provided. The guiding system (100) is connected to the inside of the cylinder housing (200), the connecting rod force amplification mechanism (300) is connected to the guiding system (100), the die assembly (400) is connected to the connecting rod force amplification mechanism (300), and the air inlet (500) is connected to the bottom of the cylinder housing (200). The connecting rod force amplification mechanism (300) includes a piston rod (310), a connecting block (320), a clamping arm (330), and a piston (340). The piston rod (310) and the piston (340) are internally connected to the guide system (100). The piston (340) is connected to the bottom of the piston rod (310). The connecting block (320) is connected to the upper part of the piston rod (310). The clamping arm (330) is connected to the connecting block (320) and the upper end of the cylinder housing (200). The piston rod (310) is made of chrome-plated material.

2. A punching cylinder according to claim 1, characterized in that: The guiding system (100) includes a guide ring (110) and a guide groove (120). The guide ring (110) is located on the upper end of the cylinder housing (200), and the guide groove (120) is located on the upper part of the cylinder housing (200). The guide ring (110) and the guide groove (120) are movably connected to the piston rod (310).

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