Small-scale magnesium alloy bar pipe hot extrusion shaping mold

A molding die and magnesium alloy technology, applied in the direction of metal extrusion dies, etc., can solve the problems of large wall thickness difference, low production efficiency, and many forming processes, etc., and achieve uniform deformation of the billet, low production cost, and simple mold structure Effect

Inactive Publication Date: 2009-10-07
CHONGQING UNIV
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the hot extrusion of magnesium alloy seamless pipe or rod is carried out on a horizontal extrusion machine with or without a perforation device, which requires large extrusion equipment and temperature control devices. The mold size is large, the structure is complex, and there are many forming processes. , high production cost
For the extrusion of small-sized magnesium alloy rods and

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Small-scale magnesium alloy bar pipe hot extrusion shaping mold
  • Small-scale magnesium alloy bar pipe hot extrusion shaping mold
  • Small-scale magnesium alloy bar pipe hot extrusion shaping mold

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0032] Example 1 (This example extrudes a thin-walled thin-walled magnesium alloy tube with an outer diameter of 8mm and an inner diameter of 6mm)

[0033] The mold structure used in this embodiment is as figure 1 As shown, the inner diameter of the lining 2 of the extrusion cylinder is 20mm, the diameter of the extrusion needle 11 is 6mm, and the diameter of the cavity of the die 12 is 8mm. The extrusion process of the die is as follows:

[0034] (1) The magnesium alloy blank is turned into a hollow cylinder with an outer diameter of 19.9mm and an inner diameter of 6.1mm by machining, the debris and burrs are removed, and the inner and outer surfaces are uniformly coated with lubricant; the punch, die 12 and extrusion After cleaning the inner wall of the inner lining 2 of the pressure cylinder, apply lubricant evenly.

[0035] (2) The lining 2 of the extrusion cylinder fixes the female die 12 on the lower die seat 7 by fitting, the extrusion needle 11 of the male die passes throu...

Example Embodiment

[0039] Example 2 (this example extrudes a magnesium alloy bar with a diameter of 8mm)

[0040] The mold structure used in this example is just figure 1 Replace the convex mold with figure 2 The punch shown is sufficient. The assembling and extrusion process of the die is completely similar to that of Example 1, except that the blank is machined into a cylinder with a diameter of 19.9 mm, coated with lubricant, and directly loaded into the extrusion cylinder, and pressed on the punch for extrusion.

[0041] The extrusion force in the extrusion process of this embodiment is very small, and the maximum extrusion force is only 98KN. The cone-shaped remainder is about 2% of the blank. The obtained magnesium alloy thin rod has a smooth surface, and its extruded rod looks like Figure 5 Shown.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a small-scale magnesium alloy bar pipe hot extrusion shaping mold, including an upper and a lower die holders, a squeezing barrel, a male die, a concave die and the like, wherein, the squeezing barrel adopts a two-layer pre-stress composite structure opened with thermometer holes, a thermal insulation sleeve is provided outside the barrel, the concave die is fixed on the lower die holder by the conjunction of a squeezing barrel, the squeezing barrel, the thermal insulation sleeve and the concave die are fastened by the upper and lower die holders; the male die directly contacts the inner wall of the squeezing barrel in transition conjunction, the upper end of the pressing stem is provided with a spacing press head to ensure that the male die is not directly pressed on the concave die. The invention can produce a variety of specifications for small-size magnesium alloy rod pipes by a simple die change, which has features of high material utilization, uniform blank deformation, small extruding force, high products dimensional precision and surface accuracy. The invention also advantages of simple mold structure, easy operation, low cost, long life and so on.

Description

technical field [0001] The invention relates to magnesium alloy hot extrusion forming technology, in particular to a small-sized magnesium alloy rod tube hot extrusion forming die, which is used in the field of magnesium alloy hot extrusion processing. Background technique [0002] Magnesium alloy has a series of advantages such as high specific strength and specific stiffness, good damping and vibration reduction, strong electromagnetic shielding and radiation resistance, easy cutting and processing, and easy recycling. It is used in automobiles, electronics, electrical appliances, transportation, aerospace, aviation and national defense military Industry and other fields have important application value and broad application prospects. However, magnesium alloys have few slip systems at room temperature and are difficult to plastically deform. Most of the products are obtained by casting, which has disadvantages such as coarse grains, poor mechanical properties, and prone t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B21C25/02
Inventor 高家诚李伟
Owner CHONGQING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap