阅读说明：本技术 预绞丝半球型端部成型刀头及应用该刀头的成型装置 (Preformed armor rod hemispherical end forming tool bit and forming device using tool bit ) 是由 张静华 李超 王秀妹 万娟 贾丽 王银春 沈啸峰 杭阿林 季健 吴俊� 吕刚 于 2020-07-06 设计创作，主要内容包括：本发明公开了一种预绞丝半球型端部成型刀头及应用该刀头的成型装置,属于电力金具生产制造加工技术领域,解决了传统预绞丝端部成型加工速度慢或者加工设备结构设计复杂的问题。刀头主要包括四根完全相同的、截面呈正方形的金属条,每根金属条的端头设有子刀头；成型装置包括工作台、动力单元、夹紧单元以及导向单元。本发明刀头及应用该刀头的成型装置以很低的成本、高效可靠地解决了预绞线端头成型加工问题,在电力金具预绞丝成型领域具有重要意义。(The invention discloses a preformed armor rod hemispherical end part forming tool bit and a forming device using the tool bit, belongs to the technical field of electric power fitting production, manufacturing and processing, and solves the problems that the conventional preformed armor rod end part forming and processing speed is low or the structural design of processing equipment is complex. The tool bit mainly comprises four identical metal strips with square sections, and the end of each metal strip is provided with a sub tool bit; the forming device comprises a workbench, a power unit, a clamping unit and a guide unit. The cutter head and the forming device applying the cutter head solve the problem of forming and processing the end of the pre-twisted wire with low cost, high efficiency and reliability, and have important significance in the field of forming the pre-twisted wire of the electric power fitting.)

1. The utility model provides a preformed armor rod hemisphere type tip shaping tool bit which characterized in that:

comprises four identical metal strips with square cross sections;

the end of each metal strip is provided with a sub-cutter head; the sub-cutter head comprises a cutting edge consistent with the warp contour of the semi-spherical end part of the preformed armor rods, and a chip removal landslide for removing chips is arranged in the direction from the cutting edge to the opposite surface of the cutting edge;

four metal strips are spliced to form the cutter head, the lower vertexes A of the blade profiles of the four blades are uniformly placed inwards, the four lower vertexes A are focused together to form a pole S of the semi-spherical end part of the preformed armor rod, and the profile of the surface of the semi-sphere of the preformed armor rod semi-spherical end part is sketched out by the profiles of the four blades.

2. The preformed hemispherical end-forming tool bit as claimed in claim 1, wherein: the sub-cutter head is formed by cutting and grinding the end of the metal strip.

3. The preformed hemispherical end bit as claimed in claim 1 or 2, wherein: the side surface of the metal strip, on which the cutting edge is arranged, is a cutting edge surface, and the side surface opposite to the cutting edge surface is a chip removal surface; the chip removal surface is provided with a chip removal profile which is lower than the blade profile in height, and the chip removal profile is ground and cut in a uniform proportion from the blade profile to the chip removal profile to form a chip removal landslide communicated with the outside.

4. The preformed hemispherical end-forming tool bit as claimed in claim 3, wherein: the chip removal profile is also arc-shaped.

5. A preformed hemispherical end forming device using the cutter head as claimed in any one of claims 1 to 4, wherein: comprises a workbench, a power unit, a clamping unit and a guide unit;

the power unit, the clamping unit and the guide unit are all arranged on the workbench;

a rotating shaft of the power unit clamps the cutter head through the clamping unit;

a guide unit fixed on the workbench is arranged right in front of the cutter head.

6. The pretwisted hemispherical end forming device of claim 5, wherein: the power unit is a three-phase asynchronous motor, and the motor is fixedly arranged on the workbench through a fastener.

7. The pretwisted hemispherical end forming device of claim 5, wherein: the clamping unit comprises a shaft sleeve, one end of the shaft sleeve is fixedly sleeved with the rotating shaft through a fastener, the other end of the shaft sleeve is provided with a tool bit accommodating groove matched with the tool bit, and the tool bit is fixed in the tool bit accommodating groove.

8. The pretwisted hemispherical end forming device of claim 7, wherein: the shaft sleeve is provided with a threaded hole communicated with the tool bit accommodating groove, and the tool bit fastening bolt is matched with the threaded hole to tightly press the tool bit in the tool bit accommodating groove.

9. The pretwisted hemispherical end forming device of claim 5, wherein: the guide unit comprises a guide seat fixed on the workbench, and preformed armor rod through holes corresponding to the positions of the tool bits are formed in the guide seat.

10. The pretwisted hemispherical end forming device of claim 9, wherein: the preformed armor rod is characterized in that the preformed armor rod through hole is a reducing hole with the outlet caliber smaller than the inlet caliber, a hollow guide column fixed on the vertical plate is arranged on the outer side of the preformed armor rod through hole, and the inner diameter of the hollow guide column is equal to the inlet caliber of the preformed armor rod through hole.

Technical Field

The invention belongs to the technical field of electric power hardware fitting production, manufacturing and processing, and particularly relates to a preformed pre-twisted wire hemispherical end forming tool bit which has the advantages of ingenious design concept, high forming speed of a preformed pre-twisted wire hemispherical end, easiness in tool bit processing, capability of effectively avoiding the phenomenon of point discharge of a preformed pre-twisted wire and effectively guaranteeing the safety of a power grid; the invention also relates to a forming device, in particular using the cutter head.

Background

The preformed armor rods are connecting fittings used for overhead power conductors and overhead power cable terminals, suspensions, joints and the like. The preformed armor rods generally include aluminum wire preformed armor rods and aluminum-clad steel preformed armor rods. Among them, the aluminum wire preformed armor rods are widely used as main conductive wires. It is known that uneven electric fields are generated in uneven conductors or fittings on high-voltage lines of 110kV and above, and when the voltage rises to a certain value around the uneven electric fields and near electrodes with small curvature radii, electricity generation occurs due to air dissociation, and corona is formed. Corona occurs, in addition to halation, as well as squeak discharge sound, and the corona current is an intermittent high pulse current that causes active power loss and radio communication interference, creating ozone and nitrogen oxides that contaminate the environment. Therefore, the end part of the preformed armor rods needs to be formed into a hemispherical shape or a parrot mouth shape so as to avoid the phenomenon of point discharge at the end part of the preformed armor rods.

The end part of the preformed armor rods is manually ground into a required shape on a grinding wheel according to hand feeling and experience at the beginning, the forming speed is low, the product consistency is poorer, and corona hidden troubles still exist for products which are not well ground. And in addition, the edge angles and burrs are formed at the splicing positions of the upper die and the lower die which are formed by pressing the dies, the secondary polishing needs to be manually carried out, the working procedure period is long, the processing speed is low, and the production cost is high. Later, some enterprises introduced automation equipment, but the automation equipment was complex in design, high in manufacturing cost, and high in maintenance cost. For example, the chinese patent with the grant publication number CN101695733B, the grant publication date 2011.08.17, the name of the invention creation being a parrot mouth-shaped overhanging preformed helical thread forming device and a forming method thereof discloses an automatic device capable of processing the end part of the preformed helical thread, which mainly comprises a chassis, a main motor, a worm wheel, a worm, a cutter, a motor, a contact switch, a control cam, a guide rail groove, a tightening wheel, a bracket and a foot switch; the worm wheel and the worm are arranged on the upper part of one side of the case through the mounting bracket, and four control cams are arranged on a worm wheel shaft and respectively comprise a first control cam, a second control cam, a third control cam and a fourth control cam; the lower part of the control cam is provided with four contact switches which are respectively a first contact switch, a second contact switch, a third contact switch and a fourth contact switch, and the four control cams are respectively corresponding to the four contact switches; the main motor is arranged on one side of the case, a small belt pulley is arranged on an output shaft of the main motor, a large belt pulley is arranged at one end of the worm, the small belt pulley passes through a transmission belt, and four control cams are arranged on a worm wheel shaft driven by the transmission worm and the worm wheel to operate; the cutting motor is arranged on the upper part of the case, a cutting tool bit is arranged on an output shaft of the cutting motor, a guide rail groove is arranged on one side of the output shaft of the motor, a limiter is arranged at the front end of the guide rail groove, a tightening wheel is arranged on the outer side of the guide rail groove, and the tightening wheel is arranged at the other end of the worm wheel shaft; the bracket is arranged on the case, and the foot switch is arranged at the lower part of the case, therefore, the technical scheme is complex, the complex structure of the mechanical equipment can bring the problem of high manufacturing cost, and simultaneously, the problems are accompanied with a series of problems of high failure rate, high maintenance cost and the like.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the preformed armor rod hemispherical end forming tool bit which has the advantages of ingenious design concept, high preformed armor rod hemispherical end forming speed, easiness in tool bit processing, capability of effectively avoiding the point discharge phenomenon of the preformed armor rod and effectively ensuring the safety of a power grid; the invention also relates to a forming device, in particular using the cutter head.

The invention is realized by the following technical scheme:

a preformed armor rod hemispherical end molding cutter head,

comprises four identical metal strips with square cross sections;

the end of each metal strip is provided with a sub-cutter head; the sub-cutter head comprises a cutting edge consistent with the warp contour of the semi-spherical end part of the preformed armor rods, and a chip removal landslide for removing chips is arranged in the direction from the cutting edge to the opposite surface of the cutting edge;

four metal strips are spliced to form the cutter head, the lower vertexes A of the blade profiles of the four blades are uniformly placed inwards, the four lower vertexes A are focused together to form a pole S of the semi-spherical end part of the preformed armor rod, and the profile of the surface of the semi-sphere of the preformed armor rod semi-spherical end part is sketched out by the profiles of the four blades.

Preferably, the sub-bit is formed by cutting and grinding an end of the metal strip.

Preferably, the side surface of the metal strip on which the cutting edge is arranged is a cutting edge surface, and the side surface opposite to the cutting edge surface is a chip removal surface; the chip removal surface is provided with a chip removal profile which is lower than the blade profile in height, and the chip removal profile is ground and cut in a uniform proportion from the blade profile to the chip removal profile to form a chip removal landslide communicated with the outside. The equal proportion is evenly polished, so that the friction resistance of the chip removal landslide is small, and the chip removal of waste blanks is facilitated.

Preferably, the chip ejection profile is also arc-shaped. The chip removal profile is designed to be arc-shaped, so that the blade profile can be sharper after equal proportion cutting.

A pre-twisted wire hemispherical end forming device applying the tool bit comprises a workbench, a power unit, a clamping unit and a guide unit;

the power unit, the clamping unit and the guide unit are all arranged on the workbench;

a rotating shaft of the power unit clamps the cutter head through the clamping unit;

a guide unit fixed on the workbench is arranged right in front of the cutter head.

Preferably, the power unit is a three-phase asynchronous motor, and the motor is fixedly arranged on the workbench through a fastener. The power unit is many, and the most common motor with relatively low cost can be used as a power source.

Preferably, the clamping unit comprises a shaft sleeve, one end of the shaft sleeve is fixedly sleeved with the rotating shaft through a fastener, the other end of the shaft sleeve is provided with a tool bit accommodating groove matched with the tool bit, and the tool bit is fixed in the tool bit accommodating groove. The axle sleeve both ends are all seted up flutedly, and one end and pivot phase-match, one end and tool bit bottom phase-match.

Preferably, the shaft sleeve is provided with a threaded hole communicated with the tool bit accommodating groove, and the tool bit fastening bolt is matched with the threaded hole to press the tool bit in the tool bit accommodating groove. Because the tool bit is formed by splicing four metal strips, the tool bit fastening bolt can be tightly pressed at the spliced seam of the two metal strips for firm splicing of the tool bit.

Preferably, the guide unit comprises a guide seat fixed on the workbench, and the guide seat is provided with a preformed armor rod perforation corresponding to the position of the cutter head.

Preferably, the preformed armor rod through hole is a reducing hole with the outlet caliber smaller than the inlet caliber, a hollow guide column fixed on the vertical plate is arranged on the outer side of the preformed armor rod through hole, and the inner diameter of the hollow guide column is equal to the inlet caliber of the preformed armor rod through hole. The reducing design of the necking makes the guide seat have good guiding effect, and the inserted end of the preformed armor rod can be accurately inserted into the cutter head.

Compared with the prior art, the invention has the beneficial effects that:

the cutter head has the advantages of ingenious design concept, simple structure, easy preparation and high quality, and can finish the processing at one time; the four spliced tool bits hold the semi-spherical end of the preformed armor rods as if one hand holds the semi-spherical end of the preformed armor rods, the circumferential track of the profile of the cutting edge forms the semi-spherical end, and the cut end part sphere is smooth, free of burrs, high in quality and qualified in one-time processing;

the forming device has the advantages of high forming speed and high processing efficiency, effectively shortens the processing and forming period, and brings considerable economic benefits to enterprises;

the forming device has simple structural design, basically no failure rate and basically no maintenance cost;

the forming device is easy to realize, the manufacturing cost is low, the cost for purchasing each whole set of equipment of the motor is within 1500 yuan, and compared with other automatic forming equipment, the cost is very low; because the device has low cost, a plurality of devices can be prepared on one production line for production at the same time, the production efficiency is maximized at the lowest cost, and the economic benefit of enterprises is maximized;

the cutter head and the forming device using the cutter head solve the problem of forming and processing the end of the preformed armor rod reliably with low cost and high efficiency, have great significance in the field of forming preformed armor rods of electric power fittings, and are particularly suitable for forming and processing the end of the preformed armor rod of an aluminum wire.

Drawings

FIG. 1 is a schematic view of a workpiece preformed armor rod construction;

FIG. 2 is a schematic structural view of the preformed armor rods before forming;

FIG. 3 is a schematic structural view of the preformed armor rods after the hemispherical ends are formed;

FIG. 4 is a first schematic view of a sub-bit configuration of the present invention;

FIG. 5 is a second schematic view of the sub-tool bit structure of the present invention;

FIG. 6 is a third schematic view of a sub-cutter head of the present invention;

FIG. 7 is a first schematic view of a tool tip configuration of the present invention;

FIG. 8 is a second schematic view of a tool tip configuration of the present invention;

FIG. 9 is a third schematic view of a tool tip configuration of the present invention;

FIG. 10 is a schematic view of the cutter head of the present invention machining the ends of the preformed armor rods;

FIG. 11 is a schematic top view of the forming apparatus of the present invention;

FIG. 12 is a schematic view of the forming device of the present invention in a front view;

FIG. 13 is a schematic perspective view of a molding apparatus according to the present invention;

FIG. 14 is a schematic perspective view of a second embodiment of the molding apparatus of the present invention;

FIG. 15 is a schematic structural view of example 7 of the present invention.

In the figure: 1. a cutter head; 11. a metal strip; 111. a blade face; 112. chip removal surfaces; 12. a sub-cutter head; 121. a blade; 122. chip removal landslide; 123. a blade profile; 124. a chip removal profile; 125. a warp contour; 2. a work table; 3. a power unit; 31. a rotating shaft; 32. a motor; 4. a clamping unit; 41. a shaft sleeve; 42. a cutter head fastening bolt; 5. a guide unit; 51. a guide seat; 511. a guide transverse plate; 512. a guide vertical plate; 513. a waist-shaped groove; 514. locking the bolt; 515. a hold-down bolt; 52. perforating preformed armor rods; 53. a hollow guide post; 6. pre-stranding; 61. the preformed armor rods are arranged at the hemispherical end parts.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

a preformed armor rod hemispherical end forming tool bit comprises four identical metal strips 11 with square sections;

the end of each metal strip 11 is provided with a sub-cutter head 12; the sub-cutter head 12 comprises a cutter edge 121 consistent with the warp contour 125 of the pre-twisted hemispherical end part 2, and a chip removal landslide 122 for removing chips is arranged in the direction from the cutter edge 121 to the opposite surface of the cutter edge 121;

the four metal strips 11 are spliced to form the cutter head 1 with a square bottom, the lower vertexes A of the blade outlines 123 of the four blades 121 are uniformly placed inwards, the four lower vertexes A are focused together to form a pole S of the preformed armor rod hemispherical end part 2, and the four blade outlines 123 outline the hemispherical surface outline of the preformed armor rod hemispherical end part 2.

Preferably, the sub-bit 12 is formed by cutting and grinding an end of the metal strip 11.

Preferably, the side of the metal strip 11 on which the cutting edge 121 is provided is the cutting edge face 111, and the side opposite to the cutting edge face 111 is the chip surface 112; chip evacuation surface 112 is provided with chip evacuation profile 124, chip evacuation profile 124 is lower in height than blade profile 123, and chip evacuation landslide 122 communicating with the outside is formed by grinding and cutting in uniform proportion from blade profile 123 to chip evacuation profile 124.

Preferably, the chip ejection profile 124 is also arc-shaped.

A pre-twisted wire hemispherical end forming device applying the cutter head comprises a workbench 2, a power unit 3, a clamping unit 4 and a guide unit 5;

the power unit 3, the clamping unit 4 and the guide unit 5 are all arranged on the workbench 2;

a rotating shaft 31 of the power unit 3 clamps the cutter head 1 through a clamping unit 4;

a guide unit 5 fixed to the table 2 is provided directly in front of the cutter head 1.

Preferably, the power unit 3 is a three-phase asynchronous motor 32, and the motor 32 is fixedly arranged on the workbench 2 through a fastener.

Preferably, the clamping unit 4 includes a shaft sleeve 41, one end of the shaft sleeve 41 is fixedly sleeved with the rotating shaft 31 through a fastener, the other end of the shaft sleeve 41 is provided with a tool bit accommodating groove matched with the tool bit 1, and the tool bit 1 is fixed in the tool bit accommodating groove.

Preferably, the shaft sleeve 41 is provided with a threaded hole communicated with the bit accommodating groove, and the bit fastening bolt 42 is matched with the threaded hole to press the bit 1 in the bit accommodating groove.

Preferably, the guide unit 5 comprises a guide seat 51 fixed on the worktable 2, and the guide seat 51 is provided with a preformed armor rod through hole 52 corresponding to the position of the cutter head 1.

Preferably, the preformed armor rod through hole 52 is a variable diameter hole with an outlet caliber smaller than an inlet caliber, a hollow guide column 53 fixed on the vertical plate is arranged on the outer side of the preformed armor rod through hole 52, and the inner diameter of the hollow guide column 53 is equal to the inlet caliber of the preformed armor rod through hole 52.

The attached drawing of the specification is a schematic diagram of a single preformed armor rod structure shown in figure 1. After being cut by the cutting machine, namely before the end part is formed, the structural shape of the end part of the pre-paying wire is as shown in figure 2 of the attached drawing, and the end part is a plane; the shape of the end of the preformed armor rods to be processed is shown in figure 3, and the end is hemispherical.