CN203118675U - Pressing mold for cable conductor of irregular shape - Google Patents

Abstract

The utility model relates to a pressing mold for a cable conductor of an irregular shape. The pressing mold for a cable conductor of the irregular shape includes a die block. A die hole penetrating through the die block is arranged in the central line of the die block. The die hole is divided into a round inlet section, an irregularly-shaped inlet section, a transformed section, a sized section and an outlet section successively from a wire inlet direction to a wire outlet direction. The length of the round inlet section is 0.2 L. The length of the irregularly-shaped inlet section is 0.2 L. The length of the transformed section is 0.3 L. The length of the sized section is 0.1 L. And the length of the outlet section is 0.2 L. L indicates the total length of the die hole. A connection place of the round inlet section and the irregularly-shaped inlet section is provided with a round chamfer. According to the utility model, the molding degree of the irregularly-shaped conductor is guaranteed to the maximum limit. At the same time, stress concentration caused by sudden changes of the shape and the dimension of the hole is avoided, so that the pressing mold for the cable conductor of the irregular shape is not easy to crack and the service lifetime of the pressing mold for the cable conductor of the irregular shape is guaranteed. And two operations of single-wire twisting and pressing for transforming of the conductor are realized on the single pressing mold for the cable conductor of the irregular shape. In single-wire twisting, the round inlet section is employed for wire connection in transition, so that the stress is uniform and no wire jumping and strand breakage is generated.

Description

The special-shaped conductor compacting mould of a kind of cable

Technical field

The utility model relates to Tool and Die Technology, is specifically related to a kind of mould that presses for the production of the special-shaped conductor of cable.

Background technology

For economical with materials reduces cost, the general employing of cable conductor core pressed structure, particularly for the extrusion type cable, when extruding or when crosslinked under pressure Insulation Material get between line the gap and prevent that moisture from entering core, so adopt compact wire.Produce pressing general employing pinch roller and pressing the mould dual mode of round conductor in the industry, and special-shaped conductor generally adopts pinch roller.But produce special-shaped conductor with pinch roller in the actual production and have following problem: 1. the gap of pinch roller is difficult for measuring and adjusting when producing, and different operating personnel cause the conductor overall dimension of production to change according to experience separately to the clearance control difference of pinch roller easily; In actual production because the conductor profile variation that pinch roller is produced, the cross section of conductor and D.C. resistance index be fluctuation and then, causes quality and cost control difficulty to product to increase; 3. because pinch roller is assembly parts, be easy to generate lower pressure wheel dislocation or malposition when assembling not in place or component wear, the conductor of production may produce problems such as out-of-shape, overlap.If special-shaped conductor can use abnormity to press mould, can control conductor size more accurately than pinch roller so, and smooth surface, can not go out problems such as impression, overlap.And use abnormity press mould can produce mould fragile, produce in single line jump easily and strand cause broken string, and threading difficulty very, problems such as the bothersome effort of operation.

Summary of the invention

The utility model proposes a kind of mould that presses for the production of the special-shaped conductor of cable at the problems referred to above that prior art exists, and has both guaranteed the conductor moulding, guarantees die life again.

The technical solution of the utility model is as follows:

The special-shaped conductor compacting mould of a kind of cable comprises module, and the center line of module is provided with the nib that runs through module.Described nib is divided into round entrance section, special-shaped entrance, deformation section, sizing section and outlet section successively by inlet wire to outlet direction.

Particularly, the length of described round entrance section is 0.2L, the length 0.2L of special-shaped entrance, and the length 0.3L of deformation section, the length 0.1L of sizing section and the length 0.2L of outlet section, L represents the total length of nib.

The junction that described round entrance section and special-shaped entrance are two sections is provided with circular chamfering.

This special-shaped conductor press mould from the structure and functional areas on can be divided into two sections, first section is the round entrance district (comprising round entrance section, special-shaped entrance) that adopt the point of incoming cables, and second section is special-shaped size distortion district (comprising deformation section, sizing section and outlet section).Abnormity size distortion district adopts rounding in the corner, chamfer radius is determined by computing formula (1) according to the corresponding line diameter of conductor, when guaranteeing the special-shaped conductor forming degree to greatest extent, avoid the sudden change of hole shape size to cause stress to concentrate mould is easily split, guarantee die life.Realized that the conductor single line is stranded and pressed two work of distortion at a mould.Rely on round entrance district's transition doubling when single line is stranded, stressed even, can not produce wire jumper back of the body thigh.

In addition, whether the chamfer design of deformed area has rationally determined the useful life of mould and has pressed effect, allow the die life height make the corner chamfer radius of pass big as far as possible, allow the conductor forming should make the corner chamfer radius of pass little as far as possible, this just needs a good balance point could unify the factor of two aspects, answer the size of chamfering relevant with the conductor line diameter with angle according to the corner of knowhow and evidence pass, chamfer radius, set up relation by computing formula (1) between angle angle and the conductor line diameter, both guarantee the conductor moulding, guaranteed die life again.

$R=\frac{\mathrm{\&pi;}}{\mathrm{\&pi;}-\mathrm{\&alpha;}}\&times;\frac{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="HDA00002610052000011.png,HDA00002610052000012.png"\; state="\{\{state\}\}">d</figure-callout>}}{2}\&times;k---\left(1\right)$

R: chamfer radius

α: chamfering place angle

D: conductor line diameter

K: deformation coefficient (k value scope is 0.7～0.9, and it is fixed to come according to the single line soft or hard, and single line is more soft, and the k value of choosing is more little, and the general single line k value of percentage elongation about 25% selects 0.8).

Adopt and originally press mould structure, can guarantee the conductor Forming Quality, can guarantee die life again.

Description of drawings

Fig. 1 is the schematic diagram (dotted line is the smooth transition region profile) that the special-shaped conductor of the utility model design presses mould;

Fig. 2 is each segment structure distribution schematic diagram that the special-shaped conductor of the utility model design presses mould;

Fig. 3 is hole shape (90 degree the are fan-shaped) schematic diagram that this special-shaped conductor presses the nib of mould;

Fig. 4 is hole shape (90 degree are fan-shaped) and the chamfer design figure of a concrete nib.

Embodiment

Further specify this structure below in conjunction with accompanying drawing:

The nib that existing round conductor presses mould is divided into entrance, deformation section, sizing section and outlet section, and the parameter of its each section sees Table one, and L represents the mould total length in the table.

Table one

Entrance	Deformation section	Sizing section	Outlet section
				0.4L	0.3L	0.1L	0.2L

Line inlet port and hole shape that this common round conductor presses mould are smooth circle.Press mould if be used for abnormity, just exist line inlet port not have the gradual change design, chamfering is unreasonable, easily carries on the back a strand broken string, the problem that the conductor compacting moulding is bad or die life is short when stranded.

Referring to Fig. 1 and Fig. 2, this special-shaped conductor compacting mould structure is as follows, and it comprises module 6, and the center line of module is provided with the nib that runs through module.Nib is divided into round entrance section 1, special-shaped entrance 2, deformation section 3, sizing section 4 and outlet section 5 successively by inlet wire to outlet direction.The parameter of each section sees Table two, and L represents the mould total length in the table.

Table two

The round entrance district	The abnormity inlet region	The deformed area	Sizing area	Outlet area
					0.2L	0.2L	0.3L	0.1L	0.2L

Referring to Fig. 3, the round entrance section that this special-shaped conductor presses mould is that the junction with special-shaped entrance is provided with circular chamfering, and the chamfering computing formula at special-shaped wedge angle and fan angle is as follows:

$R=\frac{\mathrm{\&pi;}}{\mathrm{\&pi;}-\mathrm{\&alpha;}}\&times;\frac{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="HDA00002610052000011.png,HDA00002610052000012.png"\; state="\{\{state\}\}">d</figure-callout>}}{2}\&times;k---\left(1\right)$

R: chamfer radius

α: chamfering place angle (radian is 90 degree at the fan angle at circular arc place)

D: conductor line diameter

K: deformation coefficient (k value scope is 0.7～0.9, and it is fixed to come according to the single line soft or hard, and single line is more soft, and the k value of choosing is more little, and the general single line k value of percentage elongation about 25% selects 0.8).

Among the figure, R1 and R1 refer to the chamfering at this place.

Below with produce 90 the degree 185mm ²Sector conductor be example, this 90 the degree 185mm ²Sector conductor according to conductor parameter such as the table three of technological design:

Table three

Mould length overall L is 40mm, and then the distribution of lengths of each section sees Table four:

Table four

The round entrance section	The abnormity entrance	Deformation section	Sizing section	Outlet section
					8mm	8mm	12mm	4mm	8mm

[0041] Calculate according to formula 1, $R=\frac{\mathrm{\&pi;}}{\mathrm{\&pi;}-\mathrm{\&alpha;}}\&times;\frac{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="HDA00002610052000011.png,HDA00002610052000012.png"\; state="\{\{state\}\}">d</figure-callout>}}{2}\&times;k$

The K value gets 0.8, then R=2.0mm

Therefore 90 spend 185mm ²The sector conductor hole shape figure that presses mould see Fig. 4, among the figure, R2 and R3 refer to the chamfering at this place.

As seen adopt this abnormity to press mould, the sliding line inlet port of circular light seamlessly transits to shaping area, adopts the unique calculation Design of chamfering simultaneously, has both guaranteed the conductor moulding, has guaranteed die life again.

Claims (4)

1. the special-shaped conductor compacting mould of cable comprises module, and the center line of module is provided with the nib that runs through module, it is characterized in that: described nib is divided into round entrance section, special-shaped entrance, deformation section, sizing section and outlet section successively by inlet wire to outlet direction.

2. the special-shaped conductor compacting mould of cable according to claim 1, it is characterized in that: the length of described round entrance section is 0.2L, the length 0.2L of special-shaped entrance, the length 0.3L of deformation section, the length 0.1L of sizing section and the length 0.2L of outlet section, L represents the total length of nib.

3. the special-shaped conductor compacting mould of cable according to claim 1 and 2, it is characterized in that: the junction that described round entrance section and special-shaped entrance are two sections is provided with circular chamfering.

4. the special-shaped conductor compacting mould of cable according to claim 1 and 2, it is characterized in that: described chamfer radius satisfies following formula:

R: chamfer radius

α: chamfering place angle

D: conductor line diameter

K: deformation coefficient, k value scope is 0.7～0.9, and it is fixed to come according to the single line soft or hard, and single line is more soft, and the k value of choosing is more little.

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