JP6563241B2 - Grinding wheel forming method of grinding wheel - Google Patents

Description

  The present invention relates to a method for grinding a grinding wheel using a shaping grinder (dresser). If the workpiece is subjected to surface grinding using the forming grindstone created by the dressing method of the present invention, it is a surface grinding workpiece without chatter spots even when the workpiece surface ground under sunlight irradiation is visually observed. be able to.

  In order to prevent the chatter pattern from appearing on the surface of the workpiece, in grinding work, the work of precisely grinding the grinding surface of the grinding wheel using a plurality of shaping wheels has been performed for a long time. For example, FIG. 4 of Japanese Examined Patent Publication No. 29-3044 (Patent Document 1) shows a swing type in which a rough single stone diamond grinding wheel, a semi-finished single stone diamond grinding wheel and a finished single stone diamond grinding wheel are arranged in a line. A grinding wheel forming apparatus is disclosed.

Further, Japanese Patent No. 2694189 (Patent Document 2), provided with a rotary dresser over to the left side on the reciprocating freely tables in the lateral direction, the swing-type single stone diamond shaped abrasive stone provided on the right side, the table the grinding wheel heads arranged in an upper position of the Le, movable back and forth direction and the vertical direction against the above tables, the above grindstone heads, provided with abrasive stones rotatable about the axis of the front-rear direction in grindstone molding method in surface grinder made, the lower position of the abrasive stones to position the rotary dresser chromatography step (a), the radial abrasive stone moved down while rotating the grinding wheel against the said rotary dresser over desired amount forms a slit in the step (b), and raised the grinding wheel in the radial direction of the abrasive stones after the cut of the desired amount away et whether the rotary dresser over to (c) Engineering After separating the or al abrasive stone rotary dresser over, moved by a predetermined pitch grinding wheel back-and-forth direction step (d), wherein (b), the outer peripheral surface of the grinding wheel by repeating (c) and (d) Step the shaping into a desired shape (e) step, further, similarly subsequently positioning the swing-type single stone diamond shaped abrasive stone at a lower position of the grinding wheel (f) step, the swing-type single grinding wheel after against stone diamond compact abrasive stone moved down while rotating the grinding wheel forms a slit in the desired amount in the radial direction of the grinding wheel in the step (g), the desired amount of cut in the radial direction of the grinding wheel raised the car away the swing-type single stone diamond shaped abrasive stone or al step (h), after separating the swing-type single stone diamond shaped abrasive stone or al grinding wheel, the predetermined pitch grinding wheel back-and-forth direction (I) step, which moves only ( ), (H) and (i) a step of molding finished to a desired shape an outer circumferential surface of the grinding wheel by repeating step (j), the grinding wheel molding method in surface grinding machine, characterized in that it comprises the steps of suggest.

Further, JP 2012-236253 (Patent Document 3), carried out by pivoting the forming wheel head by causing the angular adjustment of the forming abrasive stones against the grinding surface of the grinding wheel turning the pivot by a servo motor drive an angle adjustment Organization for, the molding wheel head provided in the longitudinal direction the tip of the axis of the pivot shaft, the diameter surface of the rotary molded abrasive stone rotary molded abrasive stone and a single stone diamond abrasive stones to the molding wheel head is so as to be parallel to the diametral plane of the grinding wheel and the support a such vertical plane including the diameter of the rotary molded abrasive stone comprises a molding axis plane of the single stone diamond stone - juxtaposed utilizing beam It discloses the swing-type grinding wheel molding equipment of.

  On the other hand, Japanese Patent Application Laid-Open No. 7-9337 (Patent Document 4) performs dressing spark-out after dressing (grinding stone forming) using a single stone diamond dresser until the grinding surface of the grinding wheel becomes substantially flat. A dressing method for a grinding wheel using a single stone diamond dresser, characterized in that the dressing is performed only once by giving a cut.

  Note that the grinding wheel forming method using one forming wheel of Patent Document 4 has a shorter life of the forming wheel than the grinding wheel forming method using a plurality of forming wheels described in Patent Documents 1 to 3 (the replacement time is short). It is well known in the industry.

Japanese Patent Publication No. 29-3044 Japanese Patent No. 2694189 JP 2012-236253 A Japanese Unexamined Patent Publication No. 7-9337

  Recently, a surface grinding machine manufacturer delivered 100 surface grinding workpieces as evaluation prototypes to the user. “It is indeed a workpiece with excellent luster, but it is a chatter pattern that cannot be found visually in the room. When machining workpieces with one or two spots were observed under bright sunlight, there were several machining workpieces with the above-mentioned chatter pattern spots. ”Please make sure that workpieces with chatter pattern spots do not get mixed into the delivered product.” In response to this claim, the inventors of the present invention requested a solution from the surface grinding manufacturer.

  The inventors of the present application pay attention to the idea described in Patent Document 4 and change the contact phase between the grinding surface of the grinding wheel and the monolithic diamond tool when forming the grinding wheel with a single stone diamond tool (dresser) of the grinding wheel. Inventing that the occurrence of the small chatter pattern spots would not be found on the grinding workpiece, an additional test of the example of Patent Document 4 was conducted.

FIG. 3 is a profile diagram of a grindstone grinding surface having the same content as FIG. 3 (Example) of Patent Document 4, in which the trajectory of the first grindstone molding and the trajectory of the second grindstone molding are changed (the phases are different). FIG. 3 is a profile diagram of a grindstone grinding surface performed. Since the grinding wheel is formed without controlling and controlling the phase width deviation, only a part of the grinding surface 7 of the grinding wheel 1 formed with the grinding wheel is dressed and recessed (deeper) by the cutting depth t in the radial direction. The part and the surface part which was not dressed are mixed. If there is no phase control, the grinding wheel 1 is formed on a grinding surface 7 of dressing shape with a grinding height different by 2t.

FIG. 4 is a profile diagram of a grindstone grinding surface having the same contents as FIG. 2 (comparative example) of Patent Document 4, and the trajectory of grinding wheel formation by the first dressing cut amount t and the second dressing cut amount. The trajectory of grinding wheel formation by t is the same (the phase is the same). The effect of the grinding wheel molding is small, and the height of the grinding surface 7 of the grinding wheel 1 does not change regardless of the amount of cutting in the radial direction of the grinding wheel. In other words, the grinding surface 7 of the grinding wheel 1 is formed on the grinding surface 7 of dress molding in which the height (depth) of the grinding wheel 1 is different by 2t. Easy grinding burn occurs in the grinding surface 7 of the order the grindstone shaped grinding wheel 1 of the grinding wheel forming, the finished dimensions of the grinding wheel molded grinding wheel 1, it is unnecessary grinding the expected cut amount 2t dressing It becomes.

FIG. 5 is a view similar to the profile diagram of FIG. 3 (Example) of Patent Document 4, wherein the trajectory of the grinding wheel formation with the first dressing cutting amount t and the grinding wheel formation with the second dressing cutting amount t. together carried out changing the trajectory phase, third changing the dressing depth of cut t trajectory phase of the grinding wheel molding and as identical as possible the height distribution of the grinding surface 7 of the grinding wheel 1 grindstone shaped grinding wheel 1 It is a profile figure of this grinding surface 7 . However, the difference in height of the grinding surface 7 of the grinding wheel 1 has a height distribution greater than the value of 2t, and a workpiece that has been subjected to surface grinding using the grinding wheel 1 formed with such a grinding wheel is used. When the workpiece was observed under bright sunlight irradiation, a workpiece with the above-mentioned chatter pattern spots was found. That is, it is suggested that it is necessary to further grind the surface of the grinding surface 7 showing the height exceeding the intended cutting amount 2t.

The inventors of the present application generate an electric signal generated from the same position of one rotation of the rotating grinding wheel 1 to form a screw-shaped trajectory with a cutting amount t that changes the phase not exceeding the target cutting amount 2t three times or more. extraction, where the grinding wheel 1 or performed with a numerical control grinding machine having a function combined with the signal timing of the start of the one-way feeding of the forming abrasive stone 4 (start), depth of cut 2t following grinding surface 7 could be obtained. It is confirmed that the chatter pattern spots are not observed even when observed under bright sunlight irradiation on the workpiece that has been surface-ground using the grinding wheel 1 having the grinding surface 7 having a cutting depth of 2 t or less, The present invention has been reached.

According to the first aspect of the present invention, the grinding surface of the rotating grinding wheel is 3 with a cutting amount equal to or greater than the first notch with respect to the grinding surface by relative movement of the shaping wheel and the grinding wheel. A grinding wheel forming method for a grinding wheel that performs dressing by cutting more than a strip, taking out an electric signal emitted from the same position of one rotation of the grinding wheel, and timing of starting one-way feeding of the grinding wheel or the shaping wheel the have line cut of the grinding surface with a numerical control grinding machine having a function to match the electrical signal, the difference in height of the grinding surface is the one Jomoku depth of cut of 2 times or less than it and all subsequent cuts The present invention provides a method for forming a grindstone of a grinding wheel, characterized in that the phases of the screw-like trajectories formed by cutting the cuts are not identical .

According to another aspect of the invention, 2 Jomoku cuts, the crack lines in the same cutting depth as 1 Jomoku cuts, 3 Jomoku cuts is characterized by dividing lines in deep cutting depth than the cut of the 1 Jomoku A grinding wheel forming method for a grinding wheel according to claim 1 is provided.

Than the depth distribution of the grinding surface of the grinding wheel obtained by Patent Document 4 2 times the depth of cut grindstone molding method dressing 2t by grinding molding with different phases according, more depth distribution of the ground surface of uniform grinding wheel Is obtained. The workpiece to be ground by using the grinding wheel formed with this grinding wheel was a workpiece to which no chatter pattern spots were observed even when observed under bright sunlight irradiation requested by the user.

It is a profile figure of the grinding wheel grinding surface of this invention. (Example) It is a side view of the operation | work of the grindstone shaping | molding by the single stone diamond tool of a grindstone. (Known) It is a profile figure of the grinding surface of a grinding wheel. (Known) It is a profile figure of the grinding surface of a grinding wheel. (Known) It is a profile figure of the grinding surface of a grinding wheel. (Comparative example)

FIG. 2 is a diagram showing a working state in which the grinding surface 7 (grinding wheel grinding surface) of the grinding wheel 1 of the surface grinding machine for carrying out the present invention is formed (cut) with a single stone diamond tool ( forming wheel 6). is there. In FIG. 2, 2 is a grindstone flange, 3 is a grindstone shaft, 4 is a grindstone forming device, 5 is a support handle at the top of a single stone diamond tool, and t is a cutting amount of dressing. In FIG. 2, an apparatus having a single stone diamond tool fixed on a work table is shown as the grindstone forming apparatus 4, but an overhead dresser apparatus may be used. It is also possible to use a rotary dresser to Ri algebraic sum of the single-stone diamond tools.

The present invention, the grinding surface 7 of the grinding wheel 1 rotating molding abrasive stones 6 and the by the relative movement of the grinding wheel 1 against the grinding surface 7 of the grinding wheel 1 3 or more strips, the depth of cut of the dressing t or cuts the above cutting amount, depth of cut of the grinding wheel forming the grinding surface 7 is a following grindstone shaped grinding wheel 1 grindstone molding method 2t, the grinding wheel forming the threaded locus of only the said depth of cut t takes the electrical signals emanating from the same position of one rotation of the grinding wheel 1 rotating, the grinding wheel 1 or having the ability to align with the electrical signal to the timing of the start of the one-way feeding of the forming grindstone 6 (start) Number obtaining a grinding wheel 1, cut the amount of the grinding wheel forming the grinding surface 7 is below the grinding wheel molding 2t performs cuts of the 3 or more strips with a control grinding machine.

Abrasive stone molding of the three or more strips is carried out as follows, for example. Article 1 second of the grinding wheel molding of the locus (screw-like trajectory) and the Article 2 first pitch width of the cut start position of the molded abrasive stone 6 of the trajectory of the grinding wheel molding of Article 2 eyes to the grinding wheel 1 1 of Article 1 second / 2 phase in perform only the cutting depth t of the dressing changing, dressing molded dressing depth of cut of 3 Article th (cut), the cut start depth by cutting amount t of the dressing from the Article 1 second and 2 Article th raising with different phase position height differences difference in height of the grinding surface 7 of the grinding wheel 1 which is grinding molded values following 2t performs dressing molded from the Article 1 the second and Article th grindstone shaped trajectory characterized in that the grinding surface 7 of the distribution uniform grinding wheel 1 is, Ru grindstone molding method der grinding wheel (see Figure 1).

Here, the pitch width means a width that can be subjected to grinding molding of the grinding wheel 1 of the molded abrasive stone 6 parts of the grinding wheel forming device 4, one side of the equilateral triangular shaped abrasive stone 6 in FIG. 1 Length Means. Moreover, in a rotary dresser tool, the average height of the forming tool part which protrudes many from an outer peripheral surface is meant.

Wherein the relative movement of the forming grindstone 6 and the grinding wheel 1, the movement of one direction of the grinding wheel 1, or is carried out by moving in one direction of the forming grindstone 6, in Figure 1, shaped grinding of the grinding wheel forming device 4 6 is fixed and cannot move, and the grinding wheel 1 is moved from the right direction toward the left direction toward the forming wheel 6.

Moving said relative movement in one direction of the forming grindstone 6 and the grinding wheel 1 is provided with a sensor that can output a signal at one point in one revolution of the abrasive stone shaft 3, the one-way grinding wheel 1 in accordance with the the signal Alternatively, it is possible to adjust the passage trajectory of the dresser to a predetermined position of the grinding wheel 1 by starting the feeding of the unidirectional movement of the forming grindstone 6 . Threaded locus of Article no phase shift on the grinding surface 7 of the grinding wheel be dressed a plurality of times by utilizing this feature, of course, can create the locus of plural rows of the dresser.

Furthermore, in the radial direction of the depth of cut of different combinations of a plurality conditions above Article, it is possible to optimize the grinding performance. For example, the trajectory of the grinding wheel forming the article 4 th, the trajectory of the grinding wheel forming the article 4 th article 4 th the pitch of the cut start position of the molded abrasive stones 6 to the grinding wheel 1 is 1/2 of Article 3 th by performing only the cutting depth t of dressing phase changing, it is possible to obtain without depth results in a more uniform burning of the grinding surface 7 of the distribution of 2t smaller value.

Also, shift by 1/4 pitch from the start position of the notches on the two rows first start position of the notch in Article 3 th, only Article 4 th Paragraph th start position of cuts above and Article 2 eyes from cutting amount t is lifted and may be performed dressing molded from different phase positions from the Article 1 the second and Article th grindstone molding trajectory.

As a method of taking a signal from the rotation of the grinding wheel shaft 3 , there are a method of providing a sensor capable of detecting a signal once in one rotation of the grinding wheel 1 and a method of using a detector such as a rotary encoder. Ideally, the rotation of the grindstone shaft 3 and the feed of the grindstone forming apparatus 4 are synchronized by a servo motor, but the same effect can be achieved by adjusting the timing of the grindstone forming start even if it is not synchronized control.

Hereinafter, the profile and grinding characteristics of the forming grindstone 6 will be examined by referring to the irregular shape locus formed on the grinding surface 7 of the grinding wheel 1 by the passage of the forming grindstone 6 as the profile of the grindstone.

Article 1 th incisions, cuts only cuts the amount t of dressing the grinding wheel in the radial direction. The dressing unidirectional movement feed starts with a signal once issued for one rotation of the grindstone shaft 3 as a cue. When the forming grindstone 6 passes through the width of the grinding surface 7 of the grinding wheel 1, the grinding wheel 1 escapes in the radial direction and returns to the original position in the width direction, and then the grinding wheel 1 is lowered by the amount of the radial relief. threaded locus Ru is formed by the grinding stone molding Paragraph th ends Te (locus of the forming grindstone 6 ₁ in Figure 1).

Article 2 th dressing locus (threaded trajectory) is formed by starting a phase half pitch shifted contacts the grinding wheel 1 and the molding grinding wheel 6 a molded grinding wheel 6 without cut in the radial direction of the grinding wheel 1 , it is possible to obtain a grinding surface 7 without grinding burn (locus of the forming grindstone 6 ₂ in FIG. 1).

Dressing locus of Article 3 th, molded grinding wheel 6 cuts ₃ with cutting depth t of the dressing in the radial direction of the grinding wheel 1, by starting at a position displaced further half pitch from the contact of the grinding wheel 1 and the molding grindstone 6 ₁ A ground surface 7 which is formed and has no grinding burn can be obtained. Since the deep groove formed on the grinding surface 7 of the dressed grinding wheel 1 is screw-shaped, it is hardly transferred to the workpiece (workpiece) during surface grinding of the workpiece and is therefore observed under sunlight. Ru workpiece is obtained not seen the chatter pattern spots be (locus of the forming grindstone 6 ₃ in Figure 1).

  The grinding surface of the grinding wheel (cut depth 2t or less) obtained by the grinding wheel forming method of the grinding wheel of the present invention shows no chatter pattern spots even when observed on a surface-ground workpiece under sunlight irradiation. Give unworkable workpieces.

1 grinding wheel 3 abrasive stone shaft 4 grinding wheel molding apparatus (dresser)
6 molding grinder 7 Labs Kezumen f single stone diamond tool represents the distance to the position to be started apparently been moved grindstone formed in the right direction by the leftward movement of the grinding wheel to the right from the standby position.
t switch interrupt amount

Claims (2)

The grinding surface of the rotating grinding wheel is subjected to not less than three strips with the same amount of cutting as the first notch or more than that by the relative movement of the grinding wheel and the grinding wheel. A grinding wheel forming method for a grinding wheel for dressing,
The grinding is performed using a numerically controlled grinding apparatus having a function of taking out an electric signal emitted from the same position of one rotation of the grinding wheel and matching a timing of starting the one-way feeding of the grinding wheel or the forming wheel with the electrical signal. There line the notch on the surface,
The grinding wheel forming of the grinding wheel is characterized in that a difference in height of the ground surface after the cutting is not more than twice the cutting amount of the first thread and the phase of the thread-like locus formed by all the cuttings is not the same. Method. 2 Jomoku cuts are cracking lines with the same depth of cut into the notch of the one Jomoku,
3 Jomoku cuts is characterized by dividing lines in deep cutting depth than the cut of the 1 Jomoku grinding wheel of the grinding wheel forming method according to claim 1.

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