CN112024962A - Clamping type welding hard alloy cylindrical milling cutter capable of regrinding and grinding method - Google Patents

Abstract

A clamp type welding hard alloy cylindrical milling cutter capable of regrinding and a coping method belong to the technical field of metal cutting processing. The outer circumference of cutter body distributes and has helicla flute and spiral blade clamping mechanism, and the spiral angle of helicla flute is 15, spiral blade clamping mechanism: the spiral groove of the cutter body is provided with a cutter nest, the cutter nest is provided with a screw hole, the screw hole is internally connected with a stud bolt and a wedge block, the wedge block is sleeved at one end of the stud bolt, the bottom surface of the cutter nest is provided with a cutter body spiral tooth groove, the bottom surface of a welded hard alloy spiral blade is provided with blade insections, the insections of the cutter body spiral tooth groove are matched and meshed with the blade insections, the insections of the cutter body spiral tooth groove and the blade insections are respectively in a right-angle 90-degree insection shape, and the adjacent cutter body spiral tooth grooves are provided with 0.1-0.8 mm distance between. Can be repeatedly used, and effectively reduces the use cost of the milling cutter.

Description

A kind of regrindable machine clip-type welded cemented carbide cylindrical milling cutter and grinding method

technical field

The invention belongs to the technical field of metal cutting processing, and relates to a regrindable clip-welded cemented carbide cylindrical milling cutter and a grinding method.

Background technique

The cylindrical milling cutter used when processing 1.45-meter-wide copper plates is relatively large in diameter and relatively long in length. The specifications of the first milling cutter are: diameter D260, blade length 1500, total length 2040, and the number of teeth is 18 teeth. In the past, high-speed steel milling cutters and welded carbide cylindrical milling cutters were used for processing. The durability of welded carbide cylindrical milling cutters is higher than that of high-speed steel milling cutters, so at present, welded carbide cylindrical milling cutters are mainly used. When the milling cutter is used for a period of time, the cutting edge is not sharp and needs to be reground. It can be used again after grinding. After continuous grinding, the outer diameter of the cylindrical milling cutter will continue to decrease until it cannot be used until it is scrapped. In addition, the cost of such a large diameter cylindrical milling cutter is relatively high, and the production and manufacture are inconvenient.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the prior art, the present invention provides a regrindable clip-type welded cemented carbide cylindrical milling cutter and a grinding method.

A regrindable clamp-type welded cemented carbide cylindrical milling cutter, the outer circumference of the cutter body is distributed with a spiral groove and a spiral blade clamping mechanism, the helical angle of the spiral groove is 15°, and the spiral blade clamping mechanism: The spiral groove has a knife socket, the knife socket has a screw hole, the screw hole is connected with a stud bolt and a wedge block, the wedge block is sleeved at one end of the stud bolt, the bottom surface of the knife socket is distributed with a knife body spiral tooth groove, welded carbide spiral There are blade tooth patterns on the bottom surface of the blade. The tooth patterns of the helical tooth grooves of the cutter body are matched and meshed with the tooth patterns of the blade. A distance of 0.1-0.8 mm between the tooth grooves along the radial direction on the helical grooves of the body.

One side of the cutter body is the left clamping shaft, the other side of the cutter body is the right clamping shaft, and the left clamping shaft has a central connection screw hole. °.

A grinding method for a regrindable clamp-type welded cemented carbide cylindrical milling cutter, comprising the following steps:

There is a helical groove with a helix angle of 15° on the cutter body, and a certain length of welded carbide spiral blade is welded with a cemented carbide blade, put into the pocket of the helical groove, and two The wedge block clamps the welded cemented carbide spiral blade, matches and engages the tooth pattern of the helical groove of the cutter body in the tool socket with the blade tooth pattern, and uses the stud bolt to fix the welded cemented carbide spiral blade in the cutter body;

Before grinding the milling cutter, take out the current first welded carbide spiral blade and put it into the pocket of the adjacent helical groove, and so on, change the positions of all the welded carbide spiral blades;

Place the first welded carbide helical insert into the pocket of the last helical flute and move radially one pitch.

The radius of the milling cutter is increased by a grinding allowance of W mm; the tooth pitch M is 1-1.5 mm. After adjusting the position of the spiral blade before grinding, the radius of the milling cutter is increased by a grinding allowance of W mm. Move a tooth pitch of M dimension in the radial direction, the allowance of this tooth is M-W mm more than the allowance of other cutter teeth; after the grinding step, after the milling cutter is ground, the outer diameter of the milling cutter returns to the original outer diameter diameter size.

The advantage of the present invention is that before the milling cutter needs to be ground, the current first welded cemented carbide helical blade is taken out and put into the adjacent helical groove of the cutter body, and so on, so that the positions of all the helical blades are exchanged. . Finally, put the first welded carbide helical insert into the last cutter body helical groove and move one tooth pitch M in the radial direction. At this time, the radius of the milling cutter is increased by a grinding allowance of W mm (such as an allowance of 0.5 mm). In this way, after the milling cutter is ground, the outer diameter of the milling cutter can be restored to the original outer diameter size. In this way, the outer diameter of the milling cutter will not decrease even if the milling cutter is reground for many times. The cutter body can also be used repeatedly. When the individual spiral inserts are damaged, they can be replaced individually and then ground. The milling cutter will soon resume its use function, which can effectively reduce the use cost of the milling cutter.

Description of drawings

A more complete and better understanding of the present invention, and many of its attendant advantages can be readily appreciated by reference to the following detailed description, when considered in conjunction with the accompanying drawings, but the accompanying drawings described herein are intended to provide a further understanding of the invention and constitute A part of the present invention, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute an improper limitation of the present invention, as shown in the figure:

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic view of the side structure of the present invention.

FIG. 3 is a schematic diagram of the A-A cross-sectional structure of the present invention.

FIG. 4 is a schematic diagram of the B-B cross-sectional structure of the present invention.

FIG. 5 is a schematic view of the structure of one side of the cutter body of the present invention.

FIG. 6 is a schematic view of the structure of the other side of the cutter body of the present invention.

FIG. 7 is a schematic diagram of the present invention using two wedges to clamp and weld a cemented carbide spiral blade.

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Detailed ways

Obviously, many modifications and changes made by those skilled in the art based on the spirit of the present invention belong to the protection scope of the present invention.

It will be understood by those skilled in the art that the singular forms "a", "an", "the" and "the" as used herein can include the plural forms as well, unless expressly stated otherwise. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of stated features, integers, steps, operations, elements and/or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components and/or groups thereof. It will be understood that when an element or component is referred to as being "connected" to another element or component, it can be directly connected to the other element or component or intervening elements or components may also be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It will be understood by one of ordinary skill in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art.

In order to facilitate the understanding of the embodiments, further explanations will be made below in combination, and each embodiment does not constitute a limitation to the present invention.

Example 1: As shown in Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6 and Figure 7,

A regrindable machine-clamped welded cemented carbide cylindrical milling cutter and a grinding method, particularly a regrindable machine-clamped welded cemented carbide cylindrical milling cutter (referred to as a milling cutter). The back of the welded carbide spiral blade is toothed. The welded carbide spiral insert is connected with the cutter body through tooth pattern.

A regrindable clamp-type welded cemented carbide cylindrical milling cutter, one side of the cutter body 1 is a left clamping shaft 4, the other side of the cutter body 1 is a right clamping shaft 3, and the left clamping shaft 4 has a central connecting screw hole 5. The outer circumference of the cutter body 1 is distributed with a spiral groove 2 and a spiral blade clamping mechanism. The spiral angle of the spiral groove 2 is 15°. The spiral blade clamping mechanism: the spiral groove 2 of the cutter body 1 has a knife socket, and the knife socket has The screw hole is connected with the stud bolt 7 and the wedge block 8. The wedge block 8 is sleeved on one end of the stud bolt 7. The bottom surface of the tool pocket is distributed with the cutter body helical groove, and the bottom surface of the welded carbide spiral blade 11 is distributed. There is a blade tooth pattern 10, the tooth pattern of the helical tooth groove of the cutter body is matched and meshed with the blade tooth pattern 10, and the cemented carbide spiral blade 11 is welded to the cemented carbide blade 9, and the rake angle of the cemented carbide blade 9 is 8°, The tooth pattern of the helical groove of the cutter body and the tooth pattern 10 of the blade are respectively a right-angle 90° tooth pattern, and the adjacent helical tooth grooves of the cutter body have W (0.1 ~ 0.8 mm) between the tooth grooves of the spiral tooth grooves in the radial direction. mm distance.

Embodiment 2: As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, a grinding method for regrinding machine clip-welded cemented carbide cylindrical milling cutter includes the following steps:

A helical groove 2 with a helix angle of 15° is opened on the cutter body 1, and a certain length (L) of welded cemented carbide helical blades 11 (welded cemented carbide helical blades 11 are welded with cemented carbide blades 9) are placed into the helical grooves In the tool pocket, use two wedges 8 to clamp and weld the cemented carbide spiral blade 11, match the tooth pattern of the helical groove of the cutter body in the tool pocket with the blade tooth pattern 10, and use the stud bolts 7 to connect. Welded carbide helical inserts 11 are fixed in the cutter body 1 .

Before grinding the milling cutter, take out the current first welded carbide spiral insert 11 and put it into the pocket of the adjacent helical groove 2, and so on, change the positions of all welded carbide spiral inserts 11 again.

Put the first welded cemented carbide spiral insert 11 into the pocket of the last spiral groove 2, and move one tooth pitch M in the radial direction.

At this time, the radius of the milling cutter is increased by a grinding allowance of W mm (such as an allowance of 0.5 mm).

Generally, the tooth pitch M is designed to be 1-1.5mm. After adjusting the position of the helical blade before grinding, the radius of the milling cutter is increased by a grinding allowance of W mm (such as 0.5 mm allowance), and finally the first one along the radial direction Move a tooth pitch M, the allowance of this tooth is more (M-W) mm than the allowance of other cutter teeth.

After the grinding step is carried out, after the milling cutter is ground, the outer diameter of the milling cutter can be restored to the original outer diameter size. In this way, the outer diameter of the milling cutter will not decrease even if the milling cutter is reground for many times.

The cutter body can also be used repeatedly. When the individual spiral inserts are damaged, they can be replaced individually and then ground. The milling cutter will soon resume its use function, which can effectively reduce the use cost of the milling cutter.

Example 3: As shown in Figure 1, Figure 2, Figure 3, Figure 4, Figure 5 and Figure 6, a regrindable clip-on welded carbide cylindrical milling cutter, with a 15° helix on the cutter body Angle spiral groove, put a certain length of welded carbide spiral insert (note: the carbide insert is welded on the insert seat) (referred to as: spiral insert), put into the spiral groove, clamped with two wedges screw blade, and fix the screw blade in the cutter body with double-headed screws. The entire cutting edge of the milling cutter is composed of sections of spiral blades.

In addition, serrations are made on the back of the insert seat of the welded cemented carbide helical blade, which are connected with the serrations on the helical groove of the cutter body, and the helical blade is clamped with a wedge.

In addition, the tooth pattern is also processed on the helical groove of the cutter body, and the distance of W (for example, 0.5 mm) millimeters is sequentially increased in the radial direction on the adjacent helical tooth groove of the cutter body to process the tooth pattern.

In this way, before the milling cutter needs to be sharpened, the current first welded carbide spiral insert is taken out and placed into the adjacent cutter body spiral groove, and so on, so that the positions of all spiral inserts are exchanged.

Finally, put the first welded carbide helical insert into the last cutter body helical groove and move one tooth pitch M in the radial direction. At this time, the radius of the milling cutter is increased by a grinding allowance of W mm (such as an allowance of 0.5 mm).

In this way, after the milling cutter is ground, the outer diameter of the milling cutter can be restored to the original outer diameter size such as D260. In this way, the outer diameter of the milling cutter will not decrease even if the milling cutter is reground for many times.

The cutter body can also be used repeatedly. When the individual spiral inserts are damaged, they can be replaced individually and then ground. The milling cutter will soon resume its use function, which can effectively reduce the use cost of the milling cutter.

As described above, the embodiments of the present invention have been described in detail, but it will be apparent to those skilled in the art that many modifications are possible without substantially departing from the spirit and effects of the present invention. Therefore, all such modifications are also included in the scope of the present invention.

Claims (5)

1. a regrindable clip-type welding cemented carbide cylindrical milling cutter is characterized in that the outer circumference of the cutter body is distributed with a spiral groove and a spiral blade clamping mechanism, and the spiral angle of the spiral groove is 15 °, and the spiral blade is clamped. Mechanism: The helical groove of the cutter body has a knife socket, and the knife socket has a screw hole. The screw hole is connected with a stud bolt and a wedge block. The bottom surface of the welded cemented carbide spiral blade is distributed with blade tooth patterns, the tooth pattern of the spiral tooth groove of the cutter body and the blade tooth pattern are matched and connected, and the tooth pattern of the spiral tooth groove of the cutter body and the blade tooth pattern are respectively a right angle 90° tooth profile , a distance of 0.1-0.8 mm between the tooth grooves of the helical grooves on the adjacent cutter bodies along the radial direction. 2. A regrindable clip-type welded cemented carbide cylindrical milling cutter according to claim 1, characterized in that one side of the cutter body is a left clamping shaft, the other side of the cutter body is a right clamping shaft, and the left The chuck shaft has a central connecting screw hole. 3. a kind of regrindable machine clip-type welding cemented carbide cylindrical milling cutter according to claim 1 is characterized in that welding cemented carbide spiral blade welding cemented carbide blade, and the rake angle of cemented carbide blade is 8 ° . 4. A grinding method for regrinding machine clip-type welded cemented carbide cylindrical milling cutter is characterized in that containing the following steps: There is a helical groove with a helix angle of 15° on the cutter body, and a certain length of welded carbide spiral blade is welded with a cemented carbide blade, put into the pocket of the helical groove, and two The wedge block clamps the welded cemented carbide spiral blade, matches and engages the tooth pattern of the helical groove of the cutter body in the tool socket with the blade tooth pattern, and uses the stud bolt to fix the welded cemented carbide spiral blade in the cutter body; Before grinding the milling cutter, take out the current first welded carbide spiral blade and put it into the pocket of the adjacent helical groove, and so on, change the positions of all the welded carbide spiral blades; Place the first welded carbide helical insert into the pocket of the last helical flute and move radially one pitch. 5. a kind of regrinding machine clip-type welding cemented carbide cylindrical milling cutter grinding method according to claim 4 is characterized in that the radius of milling cutter has increased the grinding allowance of W millimeters; The tooth pitch M is 1-1.5mm. After adjusting the position of the helical blade before grinding, the radius of the milling cutter is increased by a grinding allowance of W mm. Finally, the first one moves a tooth pitch of M size along the radial direction. The allowance is M-W mm more than other tooth allowances; Carry out the grinding step. After grinding the milling cutter, the outer diameter of the milling cutter is restored to the original outer diameter size.

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