Large-tonnage gantry frame type oil press

A technology of gantry frame and hydraulic press, which is applied in the field of hydraulic machinery, can solve problems such as poor anti-eccentric load capacity, and achieve the effects of ensuring anti-eccentric load capacity, improving controllability, and improving anti-eccentric load capacity

Pending Publication Date: 2019-02-22
ANHUI DONGHAI MACHINE MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the relatively poor anti-eccentric load capacity of the existing hydraulic press and provide a large tonnage gantry frame hydraulic press

Method used

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  • Large-tonnage gantry frame type oil press
  • Large-tonnage gantry frame type oil press
  • Large-tonnage gantry frame type oil press

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A large tonnage gantry frame hydraulic press in this embodiment includes left and right columns 19, an upper beam 17, a workbench 18 and a hydraulic system, and the left and right columns 19, upper beam 17 and workbench 18 are assembled to form the overall frame of the hydraulic press ,Such as figure 1 As shown, the hydraulic system includes an oil cylinder, an oil pump 2, an oil tank 16 and a three-position four-way valve 4. The oil cylinder includes a first master cylinder 1202, a second master cylinder 1202, a first auxiliary cylinder 1301 and a second auxiliary cylinder. Oil cylinder 1302, wherein the oil pump 2 is connected to the motor 3 for driving, and its oil inlet is connected to the oil tank 16 through the oil filter 1, and its oil outlet is connected to the P port of the three-position four-way valve 4, and the three-position four-way The A port of the valve 4 is connected with the lower cavity of the first auxiliary oil cylinder 1301 and the second auxiliar...

Embodiment 2

[0047] A kind of large-tonnage gantry frame type hydraulic press of this embodiment, its structure is basically the same as embodiment 1, and its difference mainly lies in: as figure 2 As shown, the first master oil cylinder 1202, the second master oil cylinder 1202, the first auxiliary oil cylinder 1301 and the second auxiliary oil cylinder 1302 are all installed on the upper beam 17 and distributed in a staggered manner according to a diamond structure, and the first auxiliary oil cylinder 1301 and the second auxiliary oil cylinder 1301 The second auxiliary oil cylinder 1302 is located on the vertical line connecting the first master oil cylinder 1202 and the second master oil cylinder 1202 . In this embodiment, the distribution of the oil cylinders is optimized and combined with the adjustment of the hydraulic system, so as to further ensure the anti-eccentric load capacity of the hydraulic press. At the same time, due to the round shape of the oil cylinder and the small i...

Embodiment 3

[0050] A large-tonnage gantry frame hydraulic press in this embodiment has the same structure as that in Embodiment 2. When the hydraulic press works on the "left" side of the equipment, its specific control process is as follows:

[0051] Quick down: YV1 of the electromagnetic overflow valve, YV2 of the three-position four-way valve 4 (three-position four-way electro-hydraulic directional valve), YV8 of the two-position four-way valve 7 and YV4, YV5, YV6 of the electromagnetic pressure reducing valve 6, YV7 is powered on, at this time the oil pump motor 3 drives the oil pump 2 to absorb oil from the oil tank 16 through the oil filter 1, and then passes through the three-position four-way valve 4 to the upper cavity of the four oil cylinders, and the other control oil path passes through the two-position four-way valve 7 (Two-position four-way reversing valve) is directly connected to the control ports of the four hydraulic control check valves 5, and the hydraulic control chec...

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Abstract

The invention discloses a large-tonnage gantry frame type oil press, and belongs to the technical field of forging machines. The gantry frame type oil press comprises a left upright column, a right upright column, an upper beam, a workbench and a hydraulic system, wherein the hydraulic system comprises oil cylinders, an oil pump and an oil tank, the piston of the oil cylinder is fixedly connectedwith a sliding block, the hydraulic system further comprises a three-position four-way valve, the oil cylinders comprises a first main oil cylinder, a second main oil cylinder, a first auxiliary oil cylinder and a second auxiliary oil cylinder, an oil inlet port of the oil pump is connected with the oil tank, an oil outlet port of the oil pump is connected with port P of the three-position four-way valve, port A of the three-position four-way valve is connected with the lower cavity of the first auxiliary oil cylinder and the lower cavity of the second auxiliary oil cylinder, port B of the three-position four-way valve is connected with the upper cavities of the four oil cylinders through four corresponding electromagnetic pressure reducing valves respectively. The oil press has the advantages that through the design optimization of the distribution mode of the oil cylinders and the structure of the hydraulic system, the anti-unbalance loading capacity of the oil press is effectively improved, and the use requirement of uneven stress during workpiece machining is met.

Description

technical field [0001] The invention belongs to the technical field of hydraulic machinery, and more specifically relates to a large-tonnage gantry frame hydraulic press. Background technique [0002] The hydraulic press is a kind of special hydraulic oil as the working medium, and the hydraulic pump as the power source. With the help of the pump force, the hydraulic oil enters the cylinder / piston through the hydraulic pipeline, and the hydraulic oil circulates in the oil tank through the check valve to make the cylinder / piston The piston does work in a cycle, so as to complete certain mechanical actions as a kind of productivity machine. Hydraulic presses are widely used in the processing of spare parts in the automotive industry, the shaping, edge punching, and correction processing of various products in various industries, the press-fitting and embossing of parts such as shoes, handbags, rubber, molds, shafts, and bushings. Bending, embossing, sleeve stretching and othe...

Claims

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Application Information

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IPC IPC(8): B30B1/32B30B15/16B30B15/04
CPCB30B1/32B30B15/04B30B15/041B30B15/166
Inventor 石贤锋陈宇石贤林陶树仁郑盼盼
Owner ANHUI DONGHAI MACHINE MFG CO LTD
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