CN211661085U

CN211661085U - Screw extrusion molding device for hard alloy bar with spiral hole

Info

Publication number: CN211661085U
Application number: CN201921912794.3U
Authority: CN
Inventors: 曾广胜
Original assignee: Hunan University of Technology
Current assignee: Hunan University of Technology
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-10-13
Anticipated expiration: 2029-11-07

Abstract

The utility model discloses a screw extrusion molding device for hard alloy bars with spiral holes, which comprises a screw extruder, wherein the end part of the extruder is provided with a die head with the shape consistent with that of the hard alloy bar; the extruder is provided with a through hole, and a polymer wire is led into the through hole; a guide hole is formed in the connecting position of the die head and the extruder; the polymer line sequentially passes through the through hole and the guide hole on the die head. The utility model discloses a screw extruder and rotary die head cooperate, have realized the stable continuous production of carbide rod, and diameter and the quantity of spiral hole just can be controlled on the carbide rod through the diameter and the quantity of adjustment polymer line guarantee that the diameter and the helix angle in spiral hole are stable.

Description

Screw extrusion molding device for hard alloy bar with spiral hole

Technical Field

The utility model relates to a carbide technical field, more specifically relates to a take screw rod extrusion moulding device of screw hole carbide rod.

Background

Carbide tool, especially carbide drill bit, usually utilizes carbide rod to process the heliciform tool bit, and when the cutter was driling, in order to reduce the temperature, water and coolant liquid had to be poured into simultaneously driling, if add from the spiral groove, can hinder the bits sediment to derive to reduce machining efficiency and cutter life-span.

The hard alloy milling tool with the internal spiral cooling hole can adopt an internal cooling mode, and can accelerate the cooling speed and the chip removal speed under the action of cooling liquid or lubricant with certain pressure, so that the rotating speed, the processing precision and the service life of the milling tool are improved. Chinese patent publication No. CN203061591U discloses an apparatus for producing alloy rod with spiral internal cooling holes, which produces alloy rod with spiral internal cooling holes by arranging an internal hole core bundle support, but only can produce single-hole hard alloy rod, but cannot produce porous hard alloy rod, and has a complex structure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the not enough among the prior art, provide a take screw rod extrusion moulding device of spiral hole carbide rod, preset the hole in advance in the rod through utilizing the polymer line, ensure the hole evenly stable distribution on the carbide rod.

The purpose of the utility model is realized through the following technical scheme:

a screw extrusion molding device for a hard alloy bar with a spiral hole comprises a screw extruder, wherein a die head with the same shape as the hard alloy bar is arranged at the end part of the extruder; the extruder is provided with a through hole, and a polymer wire is led into the through hole; a guide hole is formed in the connecting position of the die head and the extruder; the polymer line sequentially passes through the through hole and the guide hole on the die head.

Further, the die is a rotary die.

Further, the polymer wire is in a spiral horn shape on the hard alloy bar in the die head.

Further, the number of the through holes is 1-4.

Furthermore, the number of the guide holes is 1-4.

Further, the through holes and the guide holes are the same in number.

Furthermore, the through holes and the guide holes are connected one by one through polymer wires.

Further, the polymer thread is made of nylon, plastic, paraffin or fiber.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model discloses a rotatory mould head drives the polymer line and rotates, forms the helix angle in carbide blank rod, and after the high temperature heating, the polymer line is heated to decompose and becomes the hole, obtains the carbide rod of taking the spiral hole promptly.

The utility model discloses a screw extruder and rotary die head cooperate, have realized the stable continuous production of carbide rod, and diameter and the quantity of spiral hole on just can controlling the carbide rod through the diameter and the quantity of adjustment thread line guarantee that the diameter and the spiral lead angle in spiral hole are stable.

Drawings

Fig. 1 is a schematic structural view of a screw extrusion molding device for a hard alloy bar with a spiral hole.

Wherein, 1 is a charging barrel, 2 is a feed hopper, 3 is a screw, 4 is a driving motor, 5 is a through hole, 6 is a polymer line, and 7 is a rotary die head.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the invention; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the invention.

Example 1

As shown in fig. 1, the present embodiment provides a screw extrusion molding apparatus for a cemented carbide rod with a spiral hole, which includes a screw extruder and a die head 7, wherein the die head used in the present embodiment is a rotary die head. The screw extruder comprises a driving motor 4 and a charging barrel 1, the driving motor 4 is positioned at one end of the charging barrel 1, a feed hopper 2 serving as a feed inlet is arranged on the charging barrel 1, and a rotary die head 7 is arranged on a discharge outlet. Be equipped with screw rod 3 in the feed cylinder 1, screw rod 3 and 1 clearance fit of feed cylinder, screw rod 3 is connected with driving motor 4.

In the embodiment, a rotary die head 7 with the same shape as the hard alloy bar is arranged at the end part of the extruder, a through hole 5 is arranged on a charging barrel 1 of the extruder, and a polymer wire 6 is introduced into the through hole; a guide hole 7 is formed at the connecting position of the die head 7 and the extruder; the polymer strand 6 passes through the through-hole 5 and the guide hole 7 of the die 7 in this order. The diameter of the polymer wire 6 is the same as that of the spiral hole on the hard alloy bar, and the polymer wire 6 is made of any one or two of nylon and plastic. The number of the through holes 5 and the guide holes 7 is 1-4, and the number of the through holes 5 and the number of the guide holes 7 are the same as the number of the spiral holes in the hard alloy bar.

The screw extrusion molding device process of the hard alloy rod with the spiral hole provided by the embodiment is as follows: firstly, selecting a polymer wire 6 according to the requirements of the diameter and the number of spiral holes in a hard alloy bar, and sequentially passing the polymer wire 6 through a through hole 5 on a charging barrel 1 and a guide hole on a rotary die head 7; conveying the hard alloy powder to a gap between the screw rod 3 and the charging barrel 1 from the hopper, starting the driving motor 4 to drive the screw rod 3 to rotate, and conveying the hard alloy powder forwards while compressing; when the hard alloy powder is conveyed to the tail end of the charging barrel 1, the hard alloy powder is contacted with the high molecular line 6, after the hard alloy powder enters the rotary die head, the hard alloy powder is formed into a bar blank in the die head, the edge part of the die head is provided with a guide hole, the position of the guide hole is the position of the high molecular line positioned in the bar, and the high molecular line is fixed at a certain position of the section of the bar under the action of the guide hole; then, the rotary die head 7 drives the polymer wire to rotate on the hard alloy bar blank at a certain speed, the rotary die head 7 is matched with the rotating speed of the screw 3 in the screw extruder, the polymer wire 6 spirally rises in the hard alloy bar blank to form a certain helix angle, the angle of the helix angle is matched with the rotating speed of the rotary die head and the feeding speed of the extruder, and the parameters are determined according to the angle requirement without limitation; and (3) sintering the hard alloy bar blank formed in the die head at the high temperature of 1000 ℃, and melting and decomposing the polymer wire 6 to form a spiral hole, thereby obtaining the hard alloy bar with the spiral hole.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A screw extrusion molding device for a hard alloy bar with a spiral hole comprises a screw extruder, and is characterized in that a die head with the same shape as the hard alloy bar is arranged at the end of the extruder; the extruder is provided with a through hole, and a polymer wire is led into the through hole; a guide hole is formed in the connecting position of the die head and the extruder; the polymer line sequentially passes through the through hole and the guide hole on the die head.

2. The screw extrusion molding apparatus for cemented carbide rods with spiral holes of claim 1, wherein the die is a rotary die.

3. The screw extrusion molding apparatus for cemented carbide rod with spiral hole of claim 1, wherein the polymer wire is in a spiral elevation angle shape on the cemented carbide rod in the die head.

4. The screw extrusion molding apparatus for cemented carbide rods with spiral holes according to claim 1, wherein the number of the through holes is 1 to 4.

5. The screw extrusion molding apparatus for cemented carbide rods with spiral holes according to claim 1, wherein the number of the guide holes is 1 to 4.

6. A screw extrusion molding apparatus for a cemented carbide rod with a spiral hole according to claim 4 or 5, wherein the number of the through holes and the number of the guide holes are the same.

7. The screw extrusion molding apparatus of claim 6, wherein the through holes and the guide holes are connected one by polymer threads.

8. The screw extrusion molding apparatus for hard alloy rod with spiral hole according to claim 1, wherein the polymer wire is made of nylon or plastic.