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Inverted-T-shaped channel compression deformation die

A technology of extrusion deformation and passage, applied in the direction of metal extrusion dies, etc., can solve the problems of reducing the service life of the die, high labor intensity, and large die loss, so as to reduce the fracture problem, save the test time, and reduce the friction force. Effect

Active Publication Date: 2015-04-08
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure of the device is complicated, and the operation is labor-intensive. When the extrusion is finished, the bottom plate needs to be taken out to take out the sample. The operation is cumbersome, and the deformation friction generated by the extrusion of the sample in the channel is still large. The loss is too large, which reduces the service life of the mold. On the other hand, the deformation friction generated by the extrusion of the billet in the channel makes the structure of the center of the billet surface uneven, resulting in deformation stress

Method used

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  • Inverted-T-shaped channel compression deformation die

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Figure 1 ~ Figure 4 It is a structural schematic diagram of an inverted "T" channel extrusion deformation die of this embodiment. It can be seen from the figure that the device includes an extrusion pallet 1, an extrusion pallet slideway 2, a front mold 3 and a rear mold 4, and the front mold 3 is tightly connected and fixed on the rear mold by six first bolts 5. 4, the rear mold 4 is fixed on the horizontal workbench by two second bolts 6. Vertical passages are respectively provided at the central parts of the opposite faces of the front mold 3 and the rear mold 4, the upper end of the vertical passage communicates with the outside of the mould, the bottom end of the vertical passage communicates with a horizontal passage, the front mold 3 and the rear mold The mold 4 is integrally combined to form a complete inverted "T" channel, and the vertical channel has the same cross-sectional shape and area as the horizontal channel. An extruded pallet slideway 2 is respecti...

Embodiment 2

[0032] Figure 5 ~ Figure 8 It is a structural schematic diagram of an inverted "T" channel extrusion deformation die of this embodiment. Different from Embodiment 1, a roller channel 7 is also respectively provided at the rear of the extrusion pallet slideway 2, such as Figure 9 As shown, the rollers in the roller channel 7 are in close contact with the extrusion pallet and the blank.

[0033] When extrusion starts, the billet is put into the extrusion pallet 1, and only two sides of the billet and the extrusion pallet 1 are in direct contact. The extrusion head presses the extrusion pallet 1 into the vertical channel. Since the pressure is applied to the extruded pallet, the fracture problem caused by the instability of the pressure bar can be effectively alleviated. The extrusion pallet 1 carries the blank in the extrusion pallet slideway 2 and moves downward at a set speed through the rollers in the roller channel 7. By adding rollers, the traditional sliding friction ...

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Abstract

A provided inverted-T-shaped channel compression deformation die comprises extrusion support plates, extrusion support plate slideways, a front die, a rear die and roller slideways; the front de is fixedly disposed on the rear die via a bolt, the rear die is fixedly disposed on a horizontal workbench via a bolt, and the opposite faces of the front die and the rear die are both provided with a vertical channel; the upper ends of the vertical channels are communicated with the exterior of the die, and the bottom ends of the vertical channels are in communication via a horizontal channel, and the shape and the area of the cross sections of the vertical channels and the horizontal channel are same; and two opposite sides of each vertical channel are both provided with the extrusion support plate slideway in which the extrusion support plate is installed, and the rear of each extrusion support plate slideway is provided with one roller slideway, and a roller in the roller slideway is tightly contacted with the corresponding extrusion support plate and a blank material. The die structure is capable of substantially reducing the frictional force between the blank material and the die channels, saving the die mounting and dismounting time and reducing test cost.

Description

technical field [0001] The invention belongs to the technical field of metal processing and molding, in particular to a novel inverted "T" channel extrusion deformation die for performing large plastic deformation on metal materials. Background technique [0002] Ultrafine-grained metal materials (grain size 0.1-1 μm) have superior physical and mechanical properties than coarse-grained materials. Large plastic deformation is a common method for preparing ultrafine-grained metal materials, which has the advantages of compact structure and no pollution, and has received extensive attention in recent years. At present, the commonly used large plastic deformation methods include equal channel angular pressing (ECAP), high pressure torsion (high pressure torsion, HPT), cumulative roll bonding (ARB), multi-directional forging (multi-directional forging) , MDF) and repeated upsetting (cyclic channel die compression, CCDC), etc. Among them, medium-channel extrusion is one of the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C25/02
CPCB21C25/02
Inventor 魏坤霞马志俊魏伟杜庆柏胡静
Owner CHANGZHOU UNIV