JPS614613A - Multicut cartridge type milling cutter - Google Patents

Abstract

PURPOSE:To enable a milling cutter to cope with a variety of works by a cutter body formed on the outer periphery with recesses having axially different depths and receiving cartridges having at least two cutting edges. CONSTITUTION:A cutter body 10 is formed on the peripheral edge with recesses 22a-22p in which are fitted cartridges 50. The recesses differ from each other in the depth, but have same dimension and shape. In these recesses are removably and fixedly fitted cartridges 50 to which cutting edges are soldered. A plurality of cartridges 50 are prepared for types of works to be cut so that the change in the work can be rapidly coped with.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a milling machine, and more particularly, a cartridge having a plurality of brazed blades is attached to a disc-shaped milling cutter in a removable manner, and furthermore, the present invention relates to a milling machine, and more particularly, a cartridge having a plurality of brazed blades is attached to a disc-shaped milling cutter in a removable manner. The present invention relates to a multi-blade cartridge type milling cutter that is configured so that the blade surface can be positioned at a constant height and is suitable for cutting various workpieces.

BACKGROUND OF THE INVENTION Many milling machines, ie, milling machines, are used that rotate a circular blade fitted on a shaft while feeding the workpiece at a predetermined speed to cut the workpiece. In the conventional technology, the milling cutter that achieves the cutting function of a milling machine generally has a milling cutter body and a blade part that are integrally formed, but if there are many workpieces to be cut, the cutting edge may be worn out. However, even if only the cutting edge needs to be replaced, the entire milling cutter has to be replaced. Furthermore, if the types of workpieces are different, it goes without saying that the milling cutter itself must be replaced, and for this purpose, there is an inconvenience that many types of milling cutters must be prepared depending on the type of workpiece.

Therefore, as disclosed in U.S. Pat. No. 3,701,187, a tip corresponding to the cutting edge of a milling cutter is attached removably, so that even if the tip is worn out, the tip will remain intact. One possible method is to exchange only the However, with this technique, there is a limit to the number of chips that can be fixed to one milling cutter, and there are disadvantages in that the installation space must be extremely large.

Therefore, the number of tips that can be attached to one milling cutter body is not trivially large, and even if you try to change the tips depending on the type of workpiece, they are fixed to the milling cutter one by one via bolts, etc. Replacing the chips one by one becomes extremely complicated and does not actually meet the requirements of factories.

Therefore, as a result of various studies and efforts, the present inventors formed a plurality of standardized recesses of a predetermined shape on the periphery of the milling cutter body with a slight difference in level from each other, and on the other hand, the recesses If a cartridge with a shape corresponding to the above is prepared, a number of blades, that is, chips are brazed to the cartridge, and the cartridge is attached to the recessed portion with bolts, etc., replacement is easy. The number of blades can be extremely large, and even if the type of workpiece changes, it can be handled simply by replacing the cartridge, and even if the tip of the blade is worn out and needs to be resharpened after a certain period of time. By moving the cartridge to the adjacent recess, it is possible to sufficiently compensate for the blade height lowered by polishing due to the step of the recess. Therefore, it is economical and can be applied to various workpieces, and can be processed more easily. It was found that a milling cutter with improved efficiency was obtained and the above-mentioned disadvantages were eliminated.

Therefore, the purpose of the present invention is to provide easy handling and high production efficiency, to easily have multiple blades, to be able to get as close to the grindstone as possible, and to quickly replace cartridges for many types of workpieces. We simply provide a milling cutter that can accommodate your needs.

In order to achieve the above object, the present invention forms recesses having different heights in the axial direction on the outer periphery of a cutter body, and a cartridge having at least two or more blades is disposed in each of the four parts. It is characterized by

Next, preferred embodiments of the milling cutter according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 indicates a cutter body, and a large diameter hole 12 is provided in the central portion of the cutter body 10.
is formed. The end of a rotating shaft extending from the milling machine body fits into the hole 12, as will be described later. By forming the holes 12 in this way, holes 14a to 14'f for inserting bolts are bored at a predetermined interval in the center of the ring-shaped body 10. As can be easily understood from FIG. 1, the holes 14a to 14
f includes large diameter portions 16a to 16f and small diameter portions 18a to 18f, respectively. That is, regarding the hole 14a, the hole 14a is formed of a large diameter hole 16a and a small diameter hole 18a, and the same applies to the holes 14b to 14f. Furthermore, hole insertion holes 20a to 20m2 for fixing spacers, which will be described later, are bored between the respective holes 14a to 14f.

Recesses 22a to 22p for cartridge fitting are formed in the peripheral edge of the cutter body 10 configured in this manner. In this case, as shown in FIG.
22p to 22p are formed such that their bottom heights are different from each other in the axial direction.

Preferably, the heights of the bottom portions are set to differ from each other by about 0.2 m. By the way, these car 1-ridge fitting recesses 22a to 22p have the same shape and dimensions, in addition to being different in distance to the bottom as described above,
A cartridge equipped with a blade portion, which will be described later, is fitted and fixed into the recesses 22a to 22p. For this purpose, the recess 22
As shown in FIG. 2, a pair of threaded diagonal holes 24a and 24b for fixing a cartridge are provided in each of the side walls a to 22p.
is drilled.

Next, FIGS. 4 and 5 show a spacer that is attached to the cutter body 10. The spacer 30 has a circular planar shape like the cutter body 10, and has bolt insertion holes 34a to 34f bored in its center for integrally fixing the cutter body 10 and the spacer 30 to the flange of a milling machine. will be established. Similar to the hole 14a, the hole 34a has a large diameter hole 36. a and small diameter hole 3
Hole 34b, Hole 34C1 Hole 34d
, the hole 34e and the hole 34f have large diameter holes 36b to 36f and small diameter holes 38b to 38f, respectively. Furthermore, holes 40a to 40β having relatively small diameters are formed near the holes 34a to 34f.

The holes 40a to 401 correspond to the holes 20a to 20β in the cutter body 10. In addition, in the figure,
Reference numeral 42 indicates a hole formed in the center of the spacer 30 and having the same diameter as the hole 12 of the cutter body 10.

Furthermore, the cartridge to which the blade portion is attached will be explained along FIGS. 6 to 8.

As can be easily understood from FIGS. 6 to 8, the cartridge 50 has a substantially rectangular main body 52. As shown in FIGS. This main body 5
The outer shape of 2 is a recess 22 for cartridge fitting shown in Fig. 1.
It corresponds to a to 22p.

The main body 52 has an arcuate outer circumferential portion, and approximately concave half-moon-shaped curved recesses 454a to 54d are connected to the arcuate portion, and blades 56a to 56d are fixed to the rising portions by brazing. 56d is installed. Furthermore, bolt insertion holes 58a and 58b are formed in the side wall of the main body 52, which are oriented toward the center of the cutter body 10 and inclined downward when the cutter body 52 is mounted on the cutter body 10.

In this way, a cartridge in which a large number of blade parts 56a to 56d are brazed is tightly attached to the periphery of the cutter body, so the monthly distance between them is shortened, and as a result, a multi-blade milling cutter is achieved, and the blades are Since it continues without interruption, it is possible to get as close to the grindstone as possible.

Therefore, a combination of milling cutters configured as described above will be explained.

As mentioned above, first, the blades 56a to 56d are brazed to the main body! 52 is fixed to the cutter body 10.

In this case, the diagonal holes 58a and 58b of the main body 52 are used. That is, the bolts (not shown) are inserted into the oblique holes 2 formed in the cartridge fitting recesses 22a to 22p of the turbo day 10, respectively, through the oblique holes 58a and 58b.
4a and 24b, this cartridge 52 is easily fixed to the cutter body 10. The cuckoo body 10, which has a plurality of cartridges 52 arranged around its periphery in this manner, is then engaged with the spacer 30. That is, as shown in FIG. 9, with the spacer 30 and the cutter body 10 stacked together, the bolt 70 is inserted into the hole 20a of the cuckoo body lO from the spacer 30 side.
201. In this way, the cutter body 10 and the spacer 30 are integrated with each other by the holes 70a to 70β screwed in a large number on the circumference.

Next, a bolt 78 is inserted into a flange 74 fixed to a spindle 72 of a milling machine (not shown) using the holes 14a to 14f of the cutter body 10. That is, the flange 74 has a bolt screwing hole 76 formed at its peripheral edge.
A bolt 78 having a head smaller than the holes 16a to 16f, which have a larger diameter than that of the hole 14a of the cutter body 10
The holes 34a to 34f of the 14f1 spacers 30 are screwed into the holes 34a to 34f.

In this case, the bolt 78 is once loosely fitted into the relatively large diameter portions 16a to 16f of the hole 14a, but when tightening, the cuckoo body 10 and spacer 30 are rotated integrally in the direction of arrow A shown in FIG. Then, the bolts 78 are positioned in the relatively small diameter holes 18a to 113f and 38a to 38β, where the bolts 78 firmly tighten the cutter body 10 and the spacer 30. Cutter body 1 fixed to flange 74 in this way
0 is used for cutting by rotating the spindle 72 against a workpiece (not shown) using the attached blade cartridge.

On the other hand, when removing the cutter body 10 from the flange 74 of the spindle 72, first the bolts 78
Loosen this bolt 78 and insert it into hole 1 of Kanku body 10.
Relatively small diameter portions 18a to 1 in 4a to 14f
8f to larger diameter portions 16a to 16f.

In this case, the head of the bolt 78 extends from the large diameter portions 16a to 1.
6f, the cutter body 10 and spacer 30 can be removed without separating the bolt 7B from the flange 74 as a whole. Therefore, if there is a cutter body 10 equipped with a cartridge that can handle other types of workpieces and a spacer 30, the hole 14a of the cutter body 10 is
14f to 14f and the holes 34a to 34f of the spacer 30 can be used to tighten the bolt 78 and complete the installation of the blade corresponding to the workpiece.

Next, if the blades 56a to 56d are worn out due to long-term use, each of the blades 56a to 56d can be polished. In that case, first, the cartridge 50 attached to the cutter body 10 is removed. That is, the oblique holes 58a, 58 of the cartridge body 52
Remove the bolt screwed into b, and remove the cartridge main body 52 from the cutter body 10. After polishing the blades 56a to 56d, the cartridge body 52
is reinstalled into the adjacent higher recess at the bottom. That is, because the worn blades 56a to 56d have a lower blade height due to polishing, it is necessary to move the blades to an adjacent raised recess to compensate for the height. Note that the cartridge main body 52 can be attached and removed by simply removing or tightening two bolts, respectively. Furthermore, since the cartridge 50 is firmly engaged and held by the cartridge fitting recesses 22a to 22p, there is no risk of it coming off during the cutting process.

According to the present invention, as described above, chips (blades) can be attached to one cartridge at extremely narrow intervals, and therefore, a multi-blade milling cutter can be achieved. Moreover, this cartridge can be easily attached to and detached from the cutter body constituting the milling cutter with as little loosening or tightening work as possible. Therefore, the blade is mounted by fully utilizing the peripheral edge of the cutter body, and by rotating at high speed, a milling machine with extremely high cutting efficiency can be obtained.

Furthermore, as mentioned above, the cartridge itself is easy to install and remove, so if you prepare a large number of cartridges depending on the type of workpiece to be cut, you can quickly respond to changes in the workpiece. It is possible. Furthermore, there is an advantage that the number of blades itself can be adjusted by thinning out the cartridge itself from the cutter body depending on the case.

Furthermore, when the blades brazed to the cartridge become worn out, they can be easily re-sharpened, and when the heights of the blade rows become different due to the abrasion and polishing, a recess for the cartridge with a different height on the bottom surface is provided. The cartridge itself can be moved to maintain the blade at a predetermined height.

According to the present invention, as described above, it is possible to obtain a multi-blade milling cutter with an extremely simple configuration, and since the number of blades is also extremely large, the cutting ability can be made as close to the grindstone as possible. , it becomes possible to increase excellent production efficiency.

Moreover, since it is possible to handle a variety of workpieces, the production line is temporarily stopped for replacement. There's no need. Furthermore, the milling cutter according to the present invention not only can be easily replaced by anyone, but also allows the cutting edge to be polished, and in addition, differences in the cutting edge due to polishing can be absorbed by the difference in height of the recess. Therefore, the blade height remains constant,
This has the effect of making it possible to perform cutting with precision.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments, and various improvements and design changes can be made without departing from the gist of the present invention. Of course.

[Brief explanation of drawings]

The figures relate to the present invention; FIG. 1 is a plan view of the cutter body, FIG. 2 is a partially cutaway front view of the cutter body,
3 is a sectional view taken along the line ■-■ in FIG. 1, FIG. 4 is a plan view of the spacer, FIG. 5 is a sectional view taken along the line V-V in FIG. FIG. 8 is a front view of the cartridge, FIG. 8 is a sectional view of the cartridge, and FIG. 9 is a longitudinal sectional view of the cutter body and spacer combined. 10.. Cutter body 12.. Hole 14.. Hole portion 16.. Large diameter hole portion 18.. Small diameter hole portion 20.. Holt insertion hole 22.. Recessed portion
24...Diagonal hole 30...Spacer 34...
・Bolt insertion hole 3G・・Large diameter hole 38・・Small diameter hole 40・・Hole 42・・Recess 50・・Cartridge 52・・Body 54・・Recess
56.58... Groove 60... Hole 62... Blade 64... Hole 66... Bolt 70... Bolt 72... Spindle 74... Flange
76...hole 78...bolt 80...cartridge 82...
・Blade part 84...Blade 86...Cartridge 88...Blade part 90...Blade

Claims (3)

[Claims] (1) A multi-blade cartridge type milling cutter, characterized in that recesses having different heights in the axial direction are formed on the outer periphery of the cutter body, and a cartridge having at least two or more blades is disposed in the recesses. cutter. (2) A multi-blade cartridge type milling cutter in which the cartridge is detachably attached to the cutter body. (3) A multi-blade cartridge type milling cutter according to claim 1 or 2, in which the cartridge has two or more blades attached by brazing.