Home > Products > Cold Drawing Machine > Seamless Steel Pipe Cold Drawing Machine , Hydraulic Drawing Machine
Seamless Steel Pipe Cold Drawing Machine , Hydraulic Drawing Machine
- 0 Set / Sets per Month
- T/T L/C D/P D/A
- 7 days
- 2015 Different Styles 3D Metal Hotel Sign Manufacturer
- 2015 Different Styles 3D Brass Emboss Signage
- 2015 New Excellent Effect Custom Metalic Office Signs
- Outdoor Anti-rust Waterproof Wrought Iron Letters
- Anti-rust Outdoor 304# Brushed Stainless Steel Letters
- Excellent anti-rust outdoor vitreous enamel steel sign
Product Details
Brand Name: | hengli | Place of Origin: | China | Model Number: | LW10 |
Product Description
Certification:ISO9001-2000
Seamless Steel Pipe Cold Drawing Machine , Hydraulic Drawing Machine
Quick Detail:
Type: cold drawnbench
Brand name: Hengli
Model number: LW10
Input material: common carbon steel, alloy, nonferrous metal
After-sales service provided: overseas service available
Place of Origin: Jiangsu, China (Mainland)
Used in: the field of Carbon pipes, Non-ferrous metal pipes, and so on.
Description:
Introduction of the tube drawing process
When a hollow tube is drawn through a die, generally a mandrel or plug is used to support the inside diameter of the tube, this process is called tube drawing. The function of the plug is to effect wall reduction and to control the size of the hole. However, the mandrel may be omitted if it is not necessary to make a reduction in the wall thickness, or if the dimensions and surface of the inside are not important. The process to draw a pipe without any mandrel is known as tube sinking.
In drawing tubes over a stationary mandrel, the maximum practical sectional area reduction does not exceed 40 percent per pass the increased friction from the mandrel. If a carefully matched mandrel floats in the die throat of the die, it is possible to achieve a reduction in area of 45 percent, and for the same reduction the drawing loads are lower than for drawing with a fixed plug. This style is called the drawing with floating plug. To be mentioned is that in this style, tool design and lubrication can be very critical. Problems with friction in tube drawing are minimized in drawing with a long mandrel. The mandrel consists of along hard rod or wire that extends over the entire length of the tube and is drawn through the die with the tube. In this design, the area reduction can be 50 percent. However, after drawing, the mandrel must be removed from the tube by rolling (reeling), which increases the tube diameter slightly and disturbs the dimensional tolerances. The drawing process discussed above can be illustrated in the Fig. 1.
Fig. 1: Tube drawing processes. (a) sinking; (b) fixed plug; (c) floating plug; (d) moving mandrel A cold-draw bench for tubes consists of a heavy steel frame or bench, in the middle of which is located a die head for holding the die. At one end of the bench is located an adjustable holder to anchor the mandrel rod. At its other end a shaft is mounted carrying a sprocket wheel over which passes a heavy, endless, square-linked chain. This chain lies in a trough on top of the bench, which extends from the sprocket wheel to the die head, where the chain passes around an idler and returns underneath the bench to the sprocket wheel. The sprocket wheel is driven by a variable speed motor through suitable reduction gearing.
Production Operation
The hot-rolled tubes after cooling are pointed on one end. This pointing consists of reducing the outside diameter, for a distance of about 150 mm (6 inches), sufficiently to permit the reduced portion to enter the hole in the draw die freely, so that the jaws of the plyer can grip this end of the tube. If more than one cold-draw pass is to be given the tube, the point is made slightly under the final die size, if possible.
In most cases, one cold-draw pass is sufficient to reach close dimensions, good surface, and required mechanical property of the products. Additional passes may be necessary to secure: (1) thinner walls, (2) better surface finishes, (3) smaller diameters, or (4) longer length.
For production with multiple passes, it is necessary to anneal them after each cold drawing operation. Before further cold-drawing, the annealed tubes must be pickled and lubricated. All tubes, except unannealed mechanical tubes, receive a final anneal or heat treatment after the last cold-draw pass. Many tubes receive a special normalizing treatment before the last pass in order to obtain the proper grain structure in the finished tube; this annealing is performed in either continuous tunnel or car-bottom batch furnaces fired with gas. The continuous furnaces are provided with heat-resisting driven rolls used to carry the tubes through the furnace at a predetermined rate depending on the tube section, annealing temperature, time at temperature, etc. The car-bottom batch furnaces are arranged in a battery and are served by a special charging crane.
Further, the cold-drawn, annealed tubes are subjected to the finishing operation such as straightening, cutting, inspecting and testing.
Applications:
Specifications:
NO. |
Name |
Technical Parameters |
Unit |
Contact Us
- China Rolling Mill Machine Online Market
- Contact nameMr. Sam
- Phone86-755-88189785
- AddressN 406,Building n 11,TaiYue Garden Jinhua,Zhejiang
Cold Drawing Machine | Cold Pilger Mill | Cold Rolling Mill | Steel Coil Slitting Line |
Steel Rolling Mill | Steel Slitting Line |
- 6mm/8mm/12mm separated neon flex light with neon led tube advertising neon signs letter sign
- Advertising customized board led cheap waterproof open neon sign bar shop letter sign
- Birthday Decoration Neon Sign Letter LED Dimmable Neon Light Sign Frontlit Store Signage
- Flex Neon Sign Custom Colorful Led Neon Light Advertising Indoor Decoration Store Signage
- Custom Neon LED Night Light Signs Shop Pub Store Game Wedding Birthday Party Decoration
- Led Advertise Illuminate Sign Custom Logo Signage Frontlit Business Signs Stainless Steel Letters
- Led Channel Letters 3D Metal Sign Luminous Light Signage Gold Metal Stainless Steel Letter Sign
- Gold Backlit Sign Store Decor Led Sign Vintage Decorative Metal Wall Letter Luminous Shop Sign
- LED Store Signs Outdoor Custom 3D Signage Logo Board Luminous Channel Letter Sign
- Led Logo Sign Custom Business Signs 3D LED Signage Advertising Acrylic Letters
- Retail Store Name Signage Sign Commercial Signage Outdoor Led Store Front Channel Letter Sign
- Advertising Backlit Sign 3D Illuminated Logo Letter Sign Electric Outdoor Store Front Display
- Epoxy Resin Channel Letters Logo 3d Advertise Led Light Luminous Shop Sign
- Advertising Acrylic Frontlit Stainless Steel Light Box Illuminated Electronic Letters Sign Board
- Epoxy Resin Electronic Signs Frontlit Shop Signage Advertising Letters
- Hot Selling Good Quality Classic Design Lobby Office Wall stainless steel Letters Signs Signage
- Outdoor 3D Professional Custom Outdoor 3d Lighted Valentine Day Gift Decorative Plastic LED 26 Marquee Letter Light
- Kinds of Valves
Popular Searches
Find Similar Products By Category
- Electronic Components & Supplies > Electronic Signs
- Buy on GoldSupplier.com
- How to Buy
- Browse by Catagories
- Browse by Hot Regoins
- Private Sourcing Events
- Sell on GoldSupplier.com
- How to Sell
- Post Products
- Manage Products
- Manage Groups
- About
- About Us
- Link to Us
- Contact Us
- Sitemap
- Please Enter your Email Address
- Please enter the content for your inquiry.
We will find the most reliable suppliers for you according to your description.
Send Now-
Mr. Sam
Welcome to my shop! Glad to serve you!Please send your question!
Your message has exceeded the limit.
Your message has exceeded the limit.
-
-
Your inquiry content must be between 20 to 5000 characters.Send Now.
-
Please input the mailbox.
-