CN2230632Y

CN2230632Y - Drawing mould

Info

Publication number: CN2230632Y
Application number: CN 95227849
Authority: CN
Inventors: 谢志峰; 谢铁桥
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-12
Filing date: 1995-12-12
Publication date: 1996-07-10
Anticipated expiration: 2005-12-12

Abstract

The utility model belongs to sintered-carbide dies used in metal product wiredrawing industry. In building trades, to increase the bond stress between wires and concrete, the surface of the wire is required to be provided with convex or concave spiral bars or grooves. Therefore, the utility model provides a design of special die. In the utility model, the inner wall of a die hole is evenly distributed with 3 to 6 convex or concave spiral lines within the range of 360 DEG, the line has the length L between 1 and 10 mm, the width b between 0.8 and 3.0 mm, the height h between 0.20 and 0.50 mm, and the spiral angle alpha between 14 and 30 DEG. The diameter series of the utility model are from 4.0 to 14.0 mm.

Description

A kind of Drawing die set

The utility model belongs to metallic article wire drawing industry sintered-carbide die.

Building trade requires Steel Wire Surface to have convex spiral bar or spill helicla flute for increasing the bonding that bonds between steel wire and the concrete, carries over the concentric axis uniform winding of steel wire, and distributes rationally.Its objective is and utilize convex spiral bar or spill helicla flute, strengthen the running resistance of steel wire in concrete, make that both are organic to be interlocked, increase the rigidity and the amount of deflection of prestressed concrete goods and cement products.Make that the integrated engineering structure is durable prolongs life.

In China's building trade, the compressor wire that engineering component uses has only bright steel wire and indented wire in national standard " GB5223-85 ".Along with the development of building trade, require to produce band spiral bar or band spiral fluted steel wire.Processing belt spiral bar or band spiral fluted steel wire just must at first be developed novel Drawing die set.Have only circular hole, cubic hole and hexagon ring mould in national standard " GB6883-86 " the wire-drawing die standard, do not have to produce band spiral bar or spiral fluted mould.

The purpose of this utility model is to overcome original metallic article wire-drawing die and only has circular hole, cubic hole and hexagon ring, and can not produce the shortcoming that has spiral bar or spiral fluted steel wire, design a kind of special-purpose wire-drawing die of on the mould endoporus, making the short distance spiral curve that has 3～6 spills or convex.

The utility model is mainly realized by following structure.

Inwall at the mould endoporus calibrating strap of metallic article wire drawing die is evenly distributed with 3～6 convexs or spill short distance spiral curve for 360 °.Long 1～the 10mm of this spiral curve, wide 0.8～3.0mm, high 0.20～0.50mm.The relative mould longitudinal axis of above-mentioned spiral curve has 14 °～30 ° helical angle.The calibrating strap diameter series of this mould is 4.0～14.0mm.

Above-mentioned mould, when endoporus had the convex spiral curve, its convex spiral curve cross section was trapezoidal.Its trapezoidal two go up the summit (0.1～0.5mm) * 135 ° chamfering.Perhaps trapezoidal top is the circular arc of a spill.Its convex spiral curve cross section also can be semicircular.At this moment semicircle is a not a half circle, is similar to domed semicircle.

Above-mentioned mould, when endoporus had the spill spiral curve, its spill spiral curve cross section was trapezoidal.Its two trapezoidal drift angles have (0.1～0.5mm) * 135 ° chamfering.Or trapezoidal upper base or claim that the bottom is a circular arc.The spiral curve cross section of its spill also can be semicircular, is a not a half circle equally, promptly spherical semicircle.

Easy to process for actual production, in the work zone of above-mentioned mould 3～6 convex spiral curves or spill spiral curve are arranged equally.But different is, is that the hand of spiral, the helical angle from short 3～6 convex lines on high and calibrating strap is identical at these 3～6 convex spiral curves that have on the calibrating strap, and the transition lines that are connected mutually with convex lines on the calibrating strap.

These 3～6 spill lines that have on the work zone be one from shallow to deeply identical with the hand of spiral, the helical angle of spill lines on the calibrating strap, and transition lines that are connected mutually with spill lines on the calibrating strap.

Above-mentioned mould, according to different diameter series scopes, design has 5 °～14 ° operating angle at the die entrance place.

Below in conjunction with description of drawings.

Fig. 1 is the utility model structural representation.Fig. 2 is the mold insert structure schematic diagram.Fig. 3 is Fig. 2 vertical view, and the expression endoporus has the convex lines.Fig. 4 is Fig. 2 vertical view, and the expression endoporus has the spill lines.Fig. 5 is Fig. 3 X-X sectional stretch-out view.Fig. 6 is Fig. 4 Y-Y sectional stretch-out view.Fig. 7 is Fig. 4 B place partial enlarged drawing.Fig. 8 is Fig. 3 C place partial enlarged drawing.

(1) die sleeve in the drawings, (2) core rod, (3) work zone, (4) calibrating strap.β ₁Be inlet angle, β ₂Be operating angle, β ₃Be the angle of outlet, d1 is the calibrating strap diameter, and d2 is a nib calibrating strap maximum gauge, and α is a helical angle, and h is high, and b is wide, and r is a chamfer radius.

Figure 2 shows that the core rod of mould, make by carbide alloy.Be about to W-C ₀Alloy is mixed with the powdery mixture according to certain proportioning.Suppress into core rod base blank through 200 t hydraulic press with pressure 490N.Carry out vacuum-sintering 22～26 hours then, constant temperature calcining is made finished product wire-drawing mold core base after 10～12 hours.The mould base of this moment also is different steel wire diameter requirements according to the requirement of different apertures, and the different-diameter size is made at minimum place at the core rod diameter of bore.Simultaneously be at the minimum place of core rod diameter of bore work zone and calibrating strap position make have 3～6 with convex lines or spill lines.Phase I core rod base completion of processing, as shown in Figure 3, Figure 4.

Finishing step is to have boron carbide or the sticking gold-plated emery of metal bar to grind.Be about to the core rod base that the phase I makes,, grind to form finished product according to the requirement of different size steel wire.Concrete requirement is, convex lines or spill lines are evenly distributed in 360 ° of the core rod work zones twist, and its pitch angle alpha will is 14 °～30 °, and this angle is the angle of convex lines or the relative core rod longitudinal axis of spill lines.Long 1～the 10mm of convex lines or spill lines, wide 0.8～3.0mm, high 0.20～0.50mm.

The mould of the utility model design is when endoporus is made the convex lines, and this lines cross section can be trapezoidal, and for ease of the drawing resistance of reducing friction, there is (0.1～0.5mm) * 135 ° chamfering or trapezoidal upper base is made the circular arc of spill at angles on trapezoidal two.As shown in Figure 8.Semicircle also can be made in the cross section of these lines, and is spherical semicircle.When endoporus was made the spill lines, this lines cross section can be trapezoidal, and there are (0.1～0.5mm) * 135 ° of chamferings at its two angles of trapezoidal upper base.As shown in Figure 7.Or trapezoidal upper base made circular arc.Semicircle also can be made in this lines cross section, and is spherical semicircle.The direction of rotation of spiral convex lines or spill lines can be made and left-handedly also can make dextrorotation.

For drawing conveniently, in mould calibrating strap position, also be shaped on 3～6 convex spiral curves or spill spiral curve, and this convex or spill lines be from short to high or from shallow to deeply with the work zone on convex or spill lines direction of rotation is identical, helical angle is identical, and joining with it transition lines.As Fig. 5, shown in Figure 6.

In addition, according to different mould diameter requirements, design has 5 °～14 ° operating angle at the die entrance place.As β among Fig. 2 ₂Shown in.

Use the mould of the utility model design, can make various general carbon, high-carbon, low-alloy steel wire.Consider the building trade actual needs, can produce the steel wire of 4～12mm different-diameter specification.Characteristic and rule according to the steel wire plastic deformation have satisfied the demand in market substantially.Can be widely used in railroad sleeper, electric pole, over-long roof plate, high pressure cement pipe, tubular pile steel silk.

With the steel wire of this Mould Machining, its bond stress, indexs such as tensile strength are better than bright steel wire and the indented wire in the national standard " GB5223-85 compressor wire ".

Claims

1. Drawing die set is characterized in that being evenly distributed with 360 ° of nib calibrating strap inwalls the short distance spiral curve of 3～6 spills or convex, the long 1～10mm of this short distance spiral curve, wide 0.8～3.0mm, high 0.20～0.50mm; The relative mould longitudinal axis of above-mentioned convex spiral curve or spill spiral curve has 14 °～30 ° helical angle; Mould calibrating strap diameter is 4.0～14.0mm.

2. mould as claimed in claim 1 is characterized in that convex short distance spiral curve cross section is trapezoidal, and two drift angle has (0.1～0.5mm) * 135 ° chamfering.

3. mould as claimed in claim 1 is characterized in that convex short distance spiral curve cross section is trapezoidal, and its top is the circular arc of a spill.

4. mould as claimed in claim 1 is characterized in that convex short distance spiral curve cross section is semicircular, and is spherical semicircle.

5. mould as claimed in claim 1 is characterized in that spill short distance spiral curve cross section is trapezoidal, and its trapezoidal upper base has (0.1～0.5mm) * 135 ° chamfering.

6. mould as claimed in claim 1 is characterized in that spill short distance spiral curve cross section is trapezoidal, and its top is one a circular arc.

7. mould as claimed in claim 1 is characterized in that spill short distance spiral curve cross section is semicircular, and is a spherical semicircle.

8. mould as claimed in claim 1 is characterized in that the hand of spiral of above-mentioned convex short distance spiral curve is left-handed.

9. mould as claimed in claim 1 is characterized in that the hand of spiral of above-mentioned convex short distance spiral curve is dextrorotation.

10. mould as claimed in claim 1 is characterized in that, it is identical to have 3～6 hand of spiral, helical angles from short convex short distance spiral curve on high and calibrating strap in work, and joining with it transition short distance helix.

11. mould as claimed in claim 1 is characterized in that, work have 3～6 from shallow to deeply identical with the hand of spiral, the helical angle of spill spiral curve on the calibrating strap, and joining with it transitional helix line.

12. mould as claimed in claim 1 is characterized in that operating angle is 5 °～14 °.