JPH04506479A - Use of shaping tools consisting of a number of assembled discs in pre-machining or rough machining of grinding wheels - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] name of invention Use of shaping tools made up of multiple discs in pre-machining or rough machining of grinding wheels. Fields of industrial use The present invention involves shaping a full-form grinding wheel using a roll-shaped shaping tool (or dresser). (Abrichten).

Technical background The grinding wheel is shaped by diamond removal. Adjusting the grinding wheel for the general shape For shaping, a shaping roll with a corresponding overall shape is also used. German patent no. 556365 The specification states that they are arranged axially side by side and tightened against each other, and A circle formed by a number of disks with their tips distributed around the outer circumference. A cylindrical shaping roll is described. Also, US special Patent No. 1904100 also describes a method for assembling a large number of disks and embedding hard materials. A cylindrical shaping roll with chips distributed on its outer circumferential surface is shown. this These shaping rolls do not have their own drive, and these rolls have relatively large They are pressed against the grinding wheel by pressure and rotate together (minor Il+) at the same circumferential speed. hard material The embedded chips of the material are pressed onto the grinding wheel in individual dots. Its removal action is achieved by using a whetstone. It occurs when the material on the surface of the car is crushed or crushed.

European Patent Publication No. EP-A-38929 also describes cutting-type shaping (Fraes (abrichten) tools are described. That is, this European release special The official gazette states that instead of uniformly shaping the entire horse's surface, individual parts that protrude in the radial direction Shaped exclusively by synthetic diamond cutting elements, these cutting elements , during the rotational movement of the grinding wheel and rotating shaping tool (rotary dresser). Machining only parts of separate circumferential sections and reducing the axial distance between the grinding wheel and the shaping tool Despite being kept constant, the depth to the grinding wheel is unequal when viewed along the circumference. A shaping tool that rotates in the same way as a shaping roll is shown. A grindstone that is shaped uniformly around its entire circumference by the summation of individual and uneven cuts. You can get a car. An overview of cutting-type shaping can be found in the periodical “INDUSTRIAL DI” AMOND 1lEVVIEW 3/88.106-110 pages, G, warne cke, F., -J., Gr.u.e.n. and Satoshi, Gels-Dresch. er's paper-PCD in Rotary Dressers-an Appr aisal''.

The problem with shaping a grinding wheel, especially when removing relatively large amounts of material, is that The shaping tool also wears out relatively quickly, allowing the grinding wheel to correct the desired profile. This means that it will no longer be possible to provide it with certainty. Therefore, I decided to use a diamond grinding wheel for the time being. Therefore, rough shaping and precision shaping using a full-form (having a profile) shaping roll are necessary. According to Swiss patent no. It is publicly known. According to U.S. Patent Nos. 2,477,418 and 2,482,785. If so, a forming roll can also be used for pre-processing in this two-stage process. deer However, in this case, only the wear of the shaping rolls used for precision shaping is reduced. , to that extent, the shaping precision when repeatedly performing shaping work with the same shaping tool However, the shaping roll used for rough shaping quickly wears out. The defects persist and are even more severe in the case of expensive forming rolls.

Also, a two-step shaping method using two driven rotating shaping rolls that are used sequentially. gives a machining process with relatively long machining time.

Disclosure of invention The invention! l11M is the speed of rough machining of a grinding wheel using a roll-shaped shaping tool. The objective is to reduce defects due to premature wear of the shaping tool while increasing the Ru.

The second problem is that according to the present invention, the cutting elements are distributed on the outer circumference, and A robot is assembled from a number of disks arranged side by side and rotatably supported. Pre-machining or rough machining of a roll-shaped shaping tool using a cutting-type shaping wheel with a full-form grinding wheel. The cutting element, viewed in axial section, is used for The solution consists in using a rotationally driven approximated shaping tool.

An advantage of the present invention is that the cutting elements attached to each disc of the shaping tool require an expensive overall shape. No profile processing is required. Use the cutting blade to cut the adjacent disc. By protruding or retracting a predetermined amount in the radial direction relative to the cutting blade, to obtain a step-like approximation to the desired contour. The shaping tool assembled from the disc is removed from the grinding wheel to be machined with a full profile. undertake the largest portion of the work. In that case, cutting of individual discs Even if the tool wears out, it will reduce the precision of the shaping work to be completed by the second shaping tool. There is no impact on the It requires a very low layer compared to cutting tools assembled from a large number of disks. Even on bonds with considerable wear, the elements can be ground with a grinding wheel to create a step-like approximation to the desired profile. The scales generated in the The same simple geometry with straight cutting edges is sufficient, and the cutting elements are arranged on individual discs. The cutting I! differs only in the radius. a piece with an element It is better to replace the shaping tools that are assembled from different discs in the same way to cut the diamond. It is cost-effective compared to replacing a shaping tool with cutting elements. evening.

According to Zero Kabuto, the conventional grinding wheel is simply pressed against the grinding wheel layer and driven to rotate along with it. Its cutting action (fraesende Wirkung) 7F compared to the shaping tool ), which increases the removal efficiency.The driven cutting type shaping roll eliminates defects over the entire circumferential surface. Based on the system of accuracy, It is used when there are no adverse effects. In that case, based on this system In addition to the large inaccuracies, there are Proposals that also consider accuracy have proven to be particularly advantageous. it is , both inaccuracies are simultaneously eliminated by the subsequent n-close shaping, and with it, The advantages of high-speed cutting and shaping and the advantages of having a disk-like structure for the shaping tool can be fully utilized. This is because it will be used.

auspicious embodiment Generated in the first work step. The contour approximated by 411M is basically as follows. Since it is determined only by the radius at which the cutting edges of the individual cuts 11 are arranged, one embodiment of the present invention According to the example, the cutting element is fixed to a support element, which support element is radially Possibly, it is proposed to attach it to the body part of the disc. For this purpose, − By way of example, teeth may be formed on the support element with mutually parallel side edges, each tooth Shift the tooth one pitch at a time and insert it into the tooth in the matching recess of the main body of the disc , so as to combine at multiple radial positions. In particular, FJMs adjacent to each other In a preferred embodiment of the invention, the cutting elements are arranged staggered on the outer periphery. If all discs are held together axially according to the embodiment, each support element by the body parts of the discs touching each other, and by the end plates for the outer discs. are held in the axial direction by In that case, the cutting edge of the cutting element is preferably Preferably, it extends over at least the entire width (in the axial direction) of the disc. Stagger cutting elements When the cutting element of one disk is arranged in a circular shape, the cutting element of one disk is cut on the outer circumference of the adjacent disk. The corresponding location of the notch or recess may be located on the outer periphery of the disc in the form of a chip chamber, for example. If this is taken into account by adjustment of the relative angle of rotation of the notch or adjacent discs, the The cutting element as well as its cutting edge can be wider than the body portion of the disc.

Next, embodiments of the present invention shown in the drawings will be described in detail.

Brief description of the drawing Figure 1 shows a cutting-type shaping tool assembled from multiple disks.

FIG. 3 is a side view partially shown in an axial cross section.

FIG. 2 shows an embodiment of the hub of the cutting type shaping tool according to FIG. 1, which is modified from FIG. FIG. 3 is a schematic cross-sectional view showing the cutting type shaping shown in FIG. 1;

Figure 4 shows a part of cil13, a polycrystalline composite fixed to the disk of a cutting type shaping tool. An explanatory diagram showing a cutting element made of diamond on an enlarged scale; FIG. 5 is a front view of FIG. 4, showing the cutting gI element fixed to the disk.

Example The shaping tool shown in FIG. 1 is a cutting type shaping tool 10. This cutting type shaping tool is A large number of disks 12 each having a different diameter are also assembled, and these disks are A cross-sectional shape of a stepped profile that approximates the inverted version of the specified profile of the grinding wheel to be shaped. are arranged with respect to each other in the arrangement order shown.

Each disc 12 has a certain number of cutting requirements J114. In other words, in the illustrated example, there are six with cutting edges uniformly distributed over the circumference and extending parallel to the axis of rotation of the shaping tool, It has polycrystalline synthetic diamond (sintered body).

In the illustrated example, the cutting element 14 is secured, for example by brazing. It has the same convergence as the disk 12 shown in the figure. Each cutting point of two adjacent disks 12 In the assembled state, the raw materials 4 are positioned alternately on the outer periphery with respect to each other. has been done.

Securing the disc 12 to a hub 16 that supports the disc 12 is illustrated in FIGS. 1-3. ing. In these figures, each disk! 2 has a receiving opening inside This receiving opening is provided with grooves 18 uniformly distributed along its circumference. There is. A longitudinal groove 20 is formed on the outer peripheral surface of the hub 16. One groove for each of the discs 12 is formed. The hub 22 is fitted into the hub 18 and inserted into the vertical groove 20. A non-rotatable connection between 16 and disk 12 is established.

The hub 16 is attached to the drive shaft 24 by an interference fit or other suitable manner, as is conventional. Axial direction and rotational direction δ; fixed. Is the hub 16 a single unit or multiple parts? According to the embodiment of FIG. 1, the hub 16 has a bush-shaped portion 2. 6, and this bush-shaped part has a male threaded part 2 at the left end of 5i1. 8, the disc 12 has a bush-shaped portion 2 through an opening in its center. It is seated on the right part in figure B. This part receives the Subir 22. The above-mentioned longitudinal grooves 20 are formed. Right end surface of bush-shaped portion 26 A portion 30 having a ring-shaped outer diameter is fixed to the left side of the ring-shaped portion 30. The side end faces form pressing surfaces against the stack of discs 12. Male thread part 28 If the disc 12 is to be installed at the front, the ring-shaped part 30 should be It may be fixed to the bushing 26, for example by welding, but in FIG. Push the disc 12 onto the bush-shaped part 26 from the right side, and press the bush-shaped part 2. 6 and the ring-shaped portion 30 may be screwed together.

The disc 12 is inserted through an intermediate ring 34 by a nut 32 seated on the male threaded portion 28. are pressed against each other in the axial direction and pressed against the left end surface of the ring-shaped portion 30. has been done.

The hub shown in FIG. 2 has a bush-shaped portion 26 and a ring-shaped portion 30 formed integrally. The zero disk 12, which differs from the hub in FIG. It is attached from the left side in front of the ring 34 and nut 32.

In addition to the disks 12 shown in solid lines, FIG. 3 also shows adjacent disks 12 in dashed lines. , the adjacent discs, in the illustrated example, differ in size and size from the disc 12 shown in solid lines. The shapes match. The alternating arrangement of the cutting points 3114 on the outer peripheral surface is as follows: By fitting the subir 22 to different edges 18 of the two discs 12, it is possible to easily simply realized.

As is clear, for example, the cuts 11111 and 4 of the disc 12 indicated by the broken lines are adjacent to each other. In the illustrated example, the disk 12, represented by a solid line, is on the side (of the disk represented by a dashed line). When a notch is provided on the outer periphery in the area of a wide cutting element that protrudes in the direction , can be made wider than the disk 12 indicated by the broken line. This notch is - For example, the chip chamber may be arranged in front of the cutting 114 in the rotational direction. Wear.

According to the embodiment shown in rA3, 4.5, all the disks 12 and the brazed All cutting elements 14 that have been cut have substantially the same length, for example about 2 mm. here The cutting element 14 cuts each adjacent disc in the area of the cutting element 14. Even if there is no defect, it is preferably formed to be slightly wider than the disk 12. child If the sides of the cutting elements are pressed together axially, the sides of the cutting elements A disc with an adjacent free area in which the material of the grinding wheel to be shaped is removed axially between the cutting elements.

As can be seen from Fig. 4, the cut 11 key 1114 is a commercially available polycrystalline synthetic diamond sintered The diamond layer 36 is sintered together with the cemented carbide layer 38.

The cemented carbide layer 38 is brazed to the main body portion of the one disk 12.

As will be appreciated, the cutting element 14 may also be made of another particularly hard material. , in that case, the main body part of the disc 12 (usually Determined by stainability. - As an example, a polycrystalline synthetic diamond sintered body May be used without a supporting cemented carbide layer, in which case polycrystalline synthetic diamond sintered Needless to say, the concretion is carried out by a comparatively expensive method, in which one disc of 12 pieces is produced under vacuum. It may be necessary to braze the diaphragm to the body part by CVD or other suitable method. A radially projecting edge or cutting of the body portion of the disc 12 itself, coated with a mondo layer. Elements can also be used.

If you have a large number of discs 12 with slightly different diameters, these discs Cutting-type shaping of various types of profiles using plates (several plates) You can create workers one after another. However, this means that the diameters differ in a certain order. The condition is that there is a combination of disks that Make do with a relatively small number of disks 12 In order to achieve Supports that can be fixed to multiple locations on the disc body so that they can be moved stepwise or steplessly. It is only necessary to fix it to the support piece 40. For that purpose, for example, 2 forming parallel tooth-like side edges and in a matchingly shaped recess, also tooth-like, in the disc 12. The support piece 40 may be attached to the disc 12 as necessary by fitting their side edges into the support piece 40. 0 body portion at various distances from its axis of rotation. Support piece 4 0, the mounting is in the axial position by adjacent discs 12 being pressed against each other. held in the direction.

As can be seen, the disc 12 has a zero width which may have the same radius or different radius. When using a narrow disc with a width of approximately 1.5 to 3 mm, use an appropriately wide disc. Although the cost is higher than that for a special contour, the advantage is that Because the step-like approximation is better achieved, the second shaping tool used for post-processing is It is sufficient to use a material with relatively low cutting (removal) ability.

As a second shaping tool for post-processing, the tip is rotated along the outer circumferential surface of the grinding wheel. Diamond tools, conventional shaping rolls or e.g. Cutting type shaping roll with full-form cutting elements according to patent publication EP-A-38929 can be used.

Instead of rotating shaping tools, shaping blocks can be used for pre-machining and post-machining. I can do it. In this case, the invention provides a method for using a large number of discs with cutting elements of simple shape. A shaped block consisting of This shaping block is aligned with the axis of rotation of the grinding wheel. and is guided diagonally (quer) along its outer circumferential surface. In other words, this plastic surgery block The lock accommodates a rotating shaping tool according to the invention with an infinite radius .

Copy and translation of written amendment) Submission (Article 184-8 of the Patent Law) December 24, 1991

Claims (1)

[Claims] 1) Cutting elements (14) are arranged side by side in the axial direction with distribution on the outer circumference , a roll-shaped structure assembled from a large number of disks (12) and rotatably supported. Pre-machining or rough machining of the shaping tool (10) by cutting-type shaping of the full-form grinding wheel The cutting element is used to approximate a predetermined profile in a stepped manner when viewed in axial cross section. Use consisting of rotating a similar orthopedic worker (10). 2) the cutting elements (14) each cover at least the entire width of each disc (12); 2. Use according to claim 1 with a shaping tool extending in the direction of the shaping tool. 3) Claim 1 according to a shaping tool in which the cutting element (14) has a straight cutting edge. Use as described. 4) Claims by shaping tools in which the cutting element (14) has substantially axis-parallel cutting edges. Use as described in Section 3 of the Ring. 5) The cutting elements (14) of adjacent discs (12) are arranged alternately in the circumferential direction. Use according to one of claims 1 to 4. 6) A shaping tool in which a notch is formed on the outer periphery of the disk (12) in front of each cutting blade. Use according to one of claims 1 to 5 in the form of a device. 7) By means of a shaping tool with at least one disc (12) having a width of approximately 1.5 to 3 mm. Use according to one of claims 1 to 6. 8) The disc (12) is non-rotatably but axially movable due to the positive engagement. It can be movably connected to the hub (16) that supports the disc (12), and can be attached to a tightening nut, etc. Shaping tools that are mutually pressed and fixed in the axial direction by applying pressure in the axial direction Use according to one of claims 1 to 7, according to claim 1. 9) the cutting elements (14) are each fixed to one support element (40); ) is formed by shaping tools arranged in the main body of the disc (12) so as to be adjustable in the radial direction. 9. The use according to claim 8. 10) At least the cutting edge area is covered with a hard material such as diamond. Use according to one of claims 1 to 9 with a shaping tool.