JP5355916B2 - Grinding equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grinder capable of suppressing decline in grinding performance of a treated body while preventing water from splashing to guide parts and a feed screw for moving support parts supporting the treated body. <P>SOLUTION: This grinder is provided with a waterproof cover 14 provided in a position on the lower side of a grinding tool cover 26 to cover upper sides of the pair of guide parts 4, 4 and a second support part feed screw 10. A first support part 6 has a first holding part 6a for holding one end part of the treated body 100 in a position on the upper side of the waterproof cover 14 and between the guide members 4, 4. A second support part 8 is provided with: a second holding part 8a for holding the other end part of the treated body 100 in a position on the upper side of the waterproof cover 14 and between the guide members 4 and 4; a second support part base part 8b guided by the guide parts 4, 4 while avoiding interference with the waterproof cover 14; and a second support part nut part 8c screwed to the second support part feed screw 10 positioned between the guide parts 4, 4. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a grinding apparatus.

  2. Description of the Related Art Conventionally, a grinding apparatus that performs surface grinding while rotating a workpiece such as a cylindrical ingot around an axis is known (see, for example, Patent Document 1).

  The grinding device disclosed in Patent Document 1 performs surface grinding with a rotating grindstone while rotating a horizontally arranged cylindrical ingot around its axis. In this grinding apparatus, a drive system for supporting and driving the rotary grindstone body is provided on the side of the cylindrical ingot, and the rotary grindstone body is rotated by the drive system to reciprocate in the axial direction of the cylindrical ingot. Thus, the surface of the entire cylindrical ingot is polished. A base is provided below the drive system, and a pair of guide portions are provided on the base. The drive system is placed on the pair of guide portions, and the drive system and the rotating grindstone are both guided in the axial direction of the cylindrical ingot by the guide rail.

Further, a grindstone box body that covers the rotating grindstone body and the peripheral portion of the cylindrical ingot grounded by the rotating grindstone body is attached to the side surface of the drive system on the columnar ingot side. The grindstone box body moves in the axial direction of the cylindrical ingot by the drive system together with the rotating grindstone body during the grinding operation by the rotating grindstone body. A nozzle for discharging cooling water is provided in the grindstone box body, and surface grinding of the cylindrical ingot is performed while the cooling water discharged from the nozzle is applied to a grinding portion of the rotating grindstone. An opening is provided in the lower part of the grindstone box body, and a housing extending in the axial direction of the cylindrical ingot is provided below the opening, and the grindstone box body and the rotating grindstone body are provided with a cylindrical ingot. When moving in the axial direction, cooling water and grinding waste discharged into the grindstone box body flow downward through the opening and are received by the housing.
JP 2002-36112 A

  In the grinding apparatus disclosed in Patent Document 1, as a mechanism for supporting the cylindrical ingot so as to be rotatable around the axis, a first support part that supports one end of the cylindrical ingot so as to be rotatable around the axis, and a cylindrical shape A structure in which the other end portion of the ingot is pressed to the first support portion side and a second support portion that is rotatably supported around the axis is provided, and a cylindrical ingot is sandwiched between the both support portions is conceivable.

  In this structure, a guide part and a feed screw are required to move the second support part so as to press the other end part of the cylindrical ingot toward the first support part, and these are arranged immediately below the cylindrical ingot. It is preferable. However, if the guide part and the feed screw are arranged below the cylindrical ingot, the cooling water discharged from the nozzle may be applied to the guide part and the feed screw when the coolant leaks outside the grindstone box body. There is. Therefore, in order to avoid such water splashing, the guide portion and the feed screw have to be offset and disposed below the columnar ingot at positions outside the columnar ingot in the width direction. .

  However, in this case, the support of the cylindrical ingot is supported as compared to the case where the end of the cylindrical ingot is supported by moving the second support portion while guiding the second support portion with the guide portion and the feed screw arranged immediately below the cylindrical ingot. The rigidity is lowered, and the cylindrical ingot is likely to be displaced due to the rigidity, which may reduce the grinding accuracy of the cylindrical ingot.

  The present invention has been made to solve the above-described problems, and its purpose is to prevent water from splashing on the guide portion and the feed screw for moving the support portion that supports the workpiece. It is providing the grinding device which can suppress the fall of the grinding precision of a workpiece.

In order to achieve the above object, a grinding apparatus according to the present invention is a grinding apparatus that performs surface grinding while rotating a workpiece, which is an ingot extending in a specific direction, about an axis, and moves in the axial direction of the workpiece. The grinding tool that grinds the surface of the workpiece while covering the grinding tool and a portion of the workpiece around the grinding tool, and moves in the axial direction of the workpiece together with the grinding tool A grinding tool cover, a discharge portion that is provided in the grinding tool cover and discharges water to a grinding portion of the grinding tool, and an axial end of the workpiece is supported to be rotatable about an axis. The workpiece is sandwiched between the support portion and the first support portion by pressing the other end portion in the axial direction of the workpiece to the first support portion side, and the other end portion is The second support that supports the shaft to be rotatable And extending in the axial direction of the workpiece at a position below the grinding tool cover and spaced apart from each other in the horizontal direction to guide the second support portion in the axial direction of the workpiece. A pair of guide portions, a second support portion feed screw provided in a position between the pair of guide portions in the horizontal direction and extending in the axial direction of the workpiece, and the second support portion feed screw about the axis And a waterproof cover provided to cover the pair of guide parts and the second support part feed screw at a lower position of the grinding tool cover, The first support portion has a first holding portion that holds one end portion of the workpiece at a position between the pair of guide portions in the horizontal direction at a position above the waterproof cover, and the second support portion. Is the other end of the workpiece A second holding portion for holding at a position between the pair of guide portions in the horizontal direction at an upper position than the waterproof cover, with binding to its second holding portion, the pair while avoiding interference with the waterproof cover a second support portion base part which is guided in the guide portion, provided on the second support portion base portion, have a second support portion nut screwed with the second supporting section feed screw, said second 1 holding part is the part which hold | maintains the said one end part of the said to-be-processed body among the said 1st holding parts in the position between a pair of said guide parts in a horizontal direction, Comprising: The 1st rotation part comprised rotatably The second holding portion includes a second rotating portion configured to be a portion that holds the other end portion of the workpiece and is configured to be rotatable. The rotating part is rotated by the second support part feed screw to rotate the second support part. By moving the support portion toward the first support portion, the other end portion of the workpiece is held such that the workpiece is sandwiched between the first rotating portion and the second rotating portion. In a state where the workpiece is pressed between the pair of guide parts in the horizontal direction toward the first rotating part and the workpiece is sandwiched between the first rotating part and the second rotating part, The workpiece is rotated about its axis by rotating the first rotating portion and the second rotating portion .

  In this grinding apparatus, the end portion of the workpiece is moved by moving the second support portion in the axial direction of the workpiece by a pair of guide portions and a second support portion feed screw arranged below the grinding tool cover. The workpiece is pressed between the first support portion and the first support portion, and the first holding portion of the first support portion and the second holding portion of the second support portion are the workpiece. Are held at positions between the pair of guide portions in the horizontal direction. Therefore, compared to the structure in which the guide portion and the feed screw are offset from the lower side of the workpiece to the outside in the width direction, the guide portion and the second support portion of the second support portion are actually moved by the feed screw. The distance between the portion to be moved and the second holding portion that presses and holds the end portion of the workpiece can be shortened. Thereby, the support rigidity of the to-be-processed body in a 2nd support part can be improved, and the bending which arises in a 2nd support part when the edge part of a to-be-processed body is pressed and hold | maintained with a 2nd holding part is made small. be able to. As a result, it is possible to reduce the displacement of the workpiece, and to suppress a decrease in the grinding accuracy of the workpiece.

  Further, in this grinding apparatus, the pair of guide portions and the second support portion feed screw are provided below the grinding tool cover, but the waterproof cover covers the pair of guide portions and the second guide portion at a position below the grinding tool cover. Since the upper part of the support part feed screw is covered, even if the water discharged from the discharge part in the grinding tool cover leaks out of the grinding tool cover and falls, the water is blocked by the waterproof cover and the pair of It is possible to prevent water from splashing on the guide portion and the second support portion feed screw. Therefore, in this grinding apparatus, it is possible to prevent the grinding accuracy of the workpiece from being lowered while preventing water from splashing on the guide portion and the second support portion feed screw for moving the second support portion that supports the workpiece. can do.

  Further, in this grinding apparatus, the second support portion base portion is guided to the pair of guide portions while avoiding interference with the waterproof cover, and the second support portion base screw is engaged with the second support portion feed screw. Since the second support portion nut portion is provided, even if the second holding portion of the second support portion is configured to hold the end portion of the workpiece at a position above the waterproof cover, The second support portion is moved in the axial direction of the workpiece by the pair of guide portions and the second support portion feed screw arranged below the waterproof cover while avoiding interference of the workpiece, and the end portion of the workpiece Can be pressed toward the first support portion.

  In the grinding apparatus, the first holding unit and the second holding unit hold the workpiece so that an axis of the workpiece is located immediately above an axis of the second support portion feed screw. Is preferred.

  If comprised in this way, the distance between the part actually moved by the 2nd support part feed screw among the 2nd support parts, and the 2nd holding part which presses and holds the end of a processed object will be more. Since it can shorten, the support rigidity of the to-be-processed body in a 2nd support part can be improved more.

  In the grinding apparatus, the second support portion base portion includes a second support portion, a portion that is coupled to the upper side of the waterproof cover, and a portion that is disposed so as to pass through the lower side of the waterproof cover. A second support portion guided portion provided in a portion arranged to pass under the waterproof cover of the second interference avoidance portion and the second support portion interference avoidance portion guided by the respective guide portions. Are preferably included.

  If comprised in this way, the structure of the 2nd support part base part guided to a guide part can be comprised, avoiding interference with a waterproof cover.

  In this case, the second support portion interference avoidance portion includes a second holding portion mounting portion that covers the upper portion of the waterproof cover and on which the second holding portion is mounted, and the waterproof cover in the second holding portion mounting portion. A pair of second support portion extending portions extending from portions located on both outer sides in the width direction to a position below the lower end portion of the waterproof cover, and the pair of second support portion extending portions A second support portion connecting portion that connects the two under the waterproof cover, and the second support portion guided portion and the second support portion nut portion are provided in the second support portion connecting portion. It is preferred that

  If comprised in this way, since the 2nd support part interference avoidance part can be formed in the closed cross-section structure surrounding a waterproof cover, the rigidity of a 2nd support part base part can be improved.

  In the grinding apparatus, the grinding tool cover has an opening through which the workpiece is inserted, and the opening extends from the periphery of the workpiece toward the inside of the grinding tool cover. It is preferable that a fluid ejecting unit that sprays fluid onto the surface of the workpiece is provided.

  If comprised in this way, it can prevent that the water discharged from the said discharge part in the grinding tool cover leaks outside through an opening part with the fluid sprayed from a fluid injection part. Accordingly, it is possible to more reliably prevent water from splashing on the pair of guide portions and the second support portion feed screw due to leakage of water outside the grinding tool cover.

  In the grinding apparatus, the grinding tool and a grinding tool drive mechanism that moves the grinding tool cover and the grinding tool cover in the axial direction of the workpiece, the grinding tool drive mechanism at a position below the waterproof cover, and A grinding tool feed screw provided in a position between the pair of guide portions and extending in the axial direction of the workpiece; a grinding tool drive source for rotating the grinding tool feed screw about an axis; the grinding tool; A grinding tool support that supports the grinding tool cover, a grinding tool base that is coupled to the grinding tool support and is guided by the pair of guides while avoiding interference with the waterproof cover, and a grinding tool thereof It is preferable to have a grinding tool nut portion that is provided on the base portion and is screwed with the grinding tool feed screw.

  In this configuration, since the upper part of the grinding tool feed screw is covered by the waterproof cover, even if water leaks out of the grinding tool cover and falls, the water is blocked by the waterproof cover and the grinding tool feed screw is splashed with water. Can be prevented. In this configuration, the grinding tool base portion is guided by the pair of guide portions while avoiding interference with the waterproof cover, and the grinding tool base portion is provided with a grinding tool nut portion that is screwed with the grinding tool feed screw. Therefore, even if the grinding tool and the grinding tool cover are provided at a position above the waterproof cover, the pair of guide portions disposed below the waterproof cover and the pair of the guide parts while avoiding interference with the waterproof cover The grinding tool and the grinding tool cover can be moved in the axial direction of the workpiece by the grinding tool feed screw. Further, in this configuration, the pair of guide portions can be shared for guiding the second support portion, the grinding tool, and the grinding tool cover in the axial direction of the workpiece, so the guide for the second support portion. The number of parts can be reduced as compared with the case where the part and the guide part for the grinding tool and the grinding tool cover are provided individually.

  In this case, the grinding tool base portion includes a grinding tool interference avoiding portion having a portion that is coupled to the grinding tool support portion on the upper side of the waterproof cover and a portion that is disposed so as to pass under the waterproof cover. Preferably, the grinding tool interference avoiding portion includes a grinding tool guided portion that is provided in a portion arranged to pass under the waterproof cover and is guided by the guide portions.

  If comprised in this way, the structure of the grinding tool base part guided to a guide part can be comprised, avoiding interference with a waterproof cover.

  Further, in this case, the grinding tool interference avoiding portion includes a grinding tool mounting portion that covers the upper portion of the waterproof cover and on which the grinding tool support portion is mounted, and both the widthwise direction of the waterproof cover in the grinding tool mounting portion. A pair of grinding tool extending portions each extending from a portion located outside to a position below the lower end portion of the waterproof cover, and the pair of grinding tool extending portions between the pair of grinding tool extensions on the lower side of the waterproof cover It is preferable that the grinding tool connecting portion is connected to each other, and the grinding tool guided portion and the grinding tool nut portion are provided in the grinding tool connecting portion.

  If comprised in this way, since the grinding tool interference avoidance part can be formed in the closed cross-section structure surrounding a waterproof cover, the rigidity of a grinding tool base part can be improved.

  As described above, according to the grinding apparatus of the present invention, while preventing the water from splashing on the guide portion and the second support portion feed screw for moving the second support portion that presses the end portion of the workpiece, The reduction in the grinding accuracy of the workpiece can be suppressed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of a grinding apparatus according to an embodiment of the present invention as viewed from the front side. FIG. 2 is a plan view for explaining the arrangement of the second support portion feed screw 10 and the grinding tool feed screw 36 in the grinding apparatus shown in FIG. 3 is a longitudinal sectional view in a direction perpendicular to the axial direction of the workpiece 100 in the grinding tool cover 26 of the grinding apparatus shown in FIG. 4 is a longitudinal sectional view in a direction perpendicular to the axial direction of the workpiece 100 in the second support portion 8 of the grinding apparatus shown in FIG. FIG. 5 is a longitudinal sectional view along the axial direction of the workpiece 100 in the vicinity of the grinding tool cover 26. First, with reference to FIGS. 1-5, the structure of the grinding device by one Embodiment of this invention is demonstrated.

  The grinding apparatus according to the present embodiment performs surface grinding while rotating a workpiece 100 made of a cylindrical ingot extending in the horizontal direction around its axis.

  Specifically, the grinding apparatus includes a bed 2, a pair of guide parts 4, 4, a first support part 6, a second support part 8, a second support part feed screw 10, and a second support part. The drive source 12, the waterproof cover 14, the grinding part 16, the conveyance apparatus 18, and the control apparatus 20 are provided.

  The bed 2 is a portion serving as a foundation of the grinding apparatus, and is fixed on the installation surface as shown in FIG.

  The pair of guide portions 4, 4 guide the second support portion 8 and the grinding portion 16 in the axial direction of the workpiece 100. As shown in FIG. 2, the pair of guide portions 4 and 4 are formed of rail-like members that extend linearly, and the shaft of the workpiece 100 is positioned below the grinding tool cover 26 described later of the grinding portion 16. It extends in the direction and is installed on the bed 2 at intervals in the horizontal direction, that is, in the width direction of the bed 2.

  As shown in FIG. 1, the first support portion 6 is installed on one end portion of the bed 2, and supports one end portion in the axial direction of the workpiece 100 so as to be rotatable about an axis. The first support portion 6 has a first holding portion 6a.

  The first holding part 6 a holds one end of the workpiece 100 at a position between the pair of guide parts 4 and 4 at a position above the waterproof cover 14. The first holding part 6a has a first rotating part (not shown) to which one end of the workpiece 100 is fixed. The first rotating portion is configured to be rotatable about an axis, and thereby, one end portion of the workpiece 100 is supported to be rotatable about the axis. The rotating shaft of the first rotating part is located immediately above the axis of the second support part feed screw 10.

  The first holding unit 6a is additionally provided with a first holding unit drive motor 6b that rotates the first rotating unit to rotate the workpiece 100 about the axis.

  The second support portion 8 is installed on the other end portion of the bed 2, and the first support portion is pressed by pressing the other end portion of the workpiece 100 in the axial direction toward the first support portion 6. The workpiece 100 is sandwiched between the workpiece 6 and the other end of the workpiece 100 is rotatably supported around the axis.

  Specifically, the 2nd support part 8 has the 2nd holding part 8a, the 2nd support part base part 8b, and the 2nd support part nut part 8c, as shown in FIG.

  The second holding portion 8 a holds the other end portion of the workpiece 100 at a position between the pair of guide portions 4 and 4 at a position above the waterproof cover 14. The second holding portion 8a includes a second rotating portion 8d that presses and fixes the other end portion of the workpiece 100. The second rotating portion 8d is configured to be rotatable about an axis, whereby the other end portion of the workpiece 100 is supported to be rotatable about the axis. The rotation axis of the second rotating portion 8d is located immediately above the axis of the second support portion feed screw 10. Since the rotation axis of the first rotation part (not shown) and the rotation axis of the second rotation part 8d are both located immediately above the axis of the second support part feed screw 10, the axis of the workpiece 100 is obtained. The workpiece 100 is held so that is positioned immediately above the axis of the second support portion feed screw 10.

  The second holding portion 8a is provided with a second holding portion drive motor (not shown) that rotates the second rotating portion 8d to rotate the workpiece 100 about its axis.

  The second support portion base portion 8b is coupled to the second holding portion 8a and is guided by the pair of guide portions 4 and 4 while avoiding interference with the waterproof cover 14, and is axially directed to the workpiece 100. It is possible to move to.

  Specifically, the second support portion base portion 8b includes a second support portion interference avoidance portion 8e and a second support portion guided portion 8f.

  The second support portion interference avoidance portion 8e is configured to avoid interference with the waterproof cover 14, and a portion coupled to the second holding portion 8a on the upper side of the waterproof cover 14 and under the waterproof cover 14 And a portion arranged so as to pass through the side.

  The second support portion interference avoidance portion 8e includes a second holding portion mounting portion 8g, a pair of second support portion extending portions 8h and 8h, and a second support portion connecting portion 8i.

  The second holding portion mounting portion 8g is disposed so as to cover the upper portion of the waterproof cover 14 at a position below a grinding tool cover 26 described later of the grinding portion 16. The second holding portion mounting portion 8g is formed in a horizontally arranged flat plate shape, and the second holding portion 8a is mounted thereon.

  Each of the second support portion extension portions 8h extends from a portion located on both outer sides in the width direction of the waterproof cover 14 to a position below the lower end portion of the waterproof cover 14 in the second holding portion mounting portion 8g. Each is extended.

  The second support portion connecting portion 8i connects the pair of second support portion extending portions 8h, 8h to each other below the waterproof cover 14. The second support portion connecting portion 8i includes a second support portion inner extending portion 8j extending inward in the width direction from a lower end portion of each second support portion extending portion 8h, and an inner side of each second support portion. The second support portion rising portion 8k raised vertically from the inner end in the width direction of the extending portion 8j and the upper ends of the second support portion rising portions 8k, 8k are below the waterproof cover 14. It is comprised by the flat 2nd support part flat plate part 8m of the horizontal arrangement | positioning mutually connected by the side.

  The second holding portion mounting portion 8g and the second support portion flat plate portion 8m are arranged vertically with a cover portion 14a (described later) of the waterproof cover 14 interposed therebetween, and each second support portion extending portion 8h and each second portion. The support portion rising portions 8k are arranged on both sides of a cover extension portion 14b (described later) of the waterproof cover 14. The second support part interference avoiding part 8e can attach the waterproof cover 14 by the second holding part mounting part 8g, the pair of second support part extending parts 8h, 8h, and the second support part connecting part 8i configured as described above. It is formed in a closed cross-section structure.

  The second support portion guided portion 8f is guided by the pair of guide portions 4 and 4, respectively, so as to pass under the waterproof cover 14 of the second support portion interference avoidance portion 8e. It is provided at a position corresponding to each guide portion 4 on the portion to be arranged, that is, the bottom surface of the second support flat plate portion 8m. Each second support portion guided portion 8f is configured as a linear guide, for example, and is movable relative to the corresponding guide portion 4 in the longitudinal direction, that is, in the axial direction of the workpiece 100. The second support portion 8 f is guided in the axial direction of the workpiece 100 by the relative movement of the second support portion guided portion 8 f with respect to the guide portion 4.

  The second support portion nut portion 8c is provided on the bottom surface of the second support portion flat plate portion 8m, and is screwed with the second support portion feed screw 10.

  The second support part feed screw 10 is provided at a position below the waterproof cover 14 and at a position between the pair of guide parts 4, 4 so as to extend in the axial direction of the workpiece 100. ing. The second support portion feed screw 10 is supported by bearing portions 11a and 11b (see FIG. 2) installed on the bed 2 so as to be rotatable about an axis.

  The second support section drive source 12 is a motor that rotates the second support section feed screw 10 about its axis. The second support drive source 12 is installed on the end of the bed 2 on the first support 6 side, and is coupled to the corresponding end of the second support feed screw 10.

  With the above-described configuration, the second support portion feed screw 10 is rotated forward and backward around the axis by the second support portion drive source 12, and together with the second support portion nut portion 8c, the second support portion base portion 8b and The second holding portion 8 a, that is, the entire second support portion 8 can be reciprocated in the axial direction of the workpiece 100 along the second support portion feed screw 10. And by this structure, the 2nd support part 8 is moved to the 1st support part 6 side, the edge part of the to-be-processed object 100 is pressed with the 2nd rotation part 8d of the 2nd holding | maintenance part 8a, and the 1st support part 6 is pressed. The workpiece 100 can be sandwiched between the first holding part 6a and the second holding part 8a of the second support part 8.

  The waterproof cover 14 is for preventing water from splashing on the pair of guide portions 4, 4, the second support portion feed screw 10, and a grinding tool feed screw 36 (to be described later) of the grinding portion 16. is there. As shown in FIG. 3, the waterproof cover 14 is disposed above the guide portions 4, 4 and the feed screws 10, 36 at a position below the grinding tool cover 26 described later of the grinding portion 16. It is provided so as to cover the entire direction. The waterproof cover 14 includes a cover portion 14a and a pair of cover portion extending portions 14b and 14b.

  The cover portion 14a is a portion that covers the guide portions 4 and 4 and the second support portion feed screw 10, and is bent in a mountain fold shape with the center position in the width direction as a vertex. Each of the cover extending portions 14b is a portion that extends downward from both ends in the width direction of the cover 14a.

  The grinding part 16 is for grinding the workpiece 100. The grinding part 16 includes a surface grinding tool 22, a surface grinding tool drive motor 23, a notch part grinding tool 24, a notch part grinding tool drive motor 25, a grinding tool cover 26, an unillustrated discharge part, water It has the injection part 30, the brush 32, and the grinding tool drive mechanism 34.

  The surface grinding tool 22 grinds the surface of the workpiece 100 while rotating by driving the surface grinding tool drive motor 23. The surface grinding tool 22 is provided on a side of the workpiece 100 and includes a grindstone that rotates around a horizontal axis perpendicular to the axial direction of the workpiece 100. The surface grinding tool 22 is reciprocated in the axial direction of the workpiece 100 by the grinding tool drive mechanism 34, and the entire surface of the workpiece 100 is ground in the course of the movement.

  The notch grinding tool 24 grinds the workpiece 100 while rotating by driving the notch grinding tool drive motor 25 to form a notch portion (cut portion) extending in the axial direction on the surface of the workpiece 100. Is. The notch grinding tool 24 is provided on the side of the workpiece 100 and includes a grindstone that rotates around a vertical axis. The notch portion grinding tool 24 is reciprocated in the axial direction of the workpiece 100 by the grinding tool drive mechanism 34, and the notch portion grinding tool 24 extends over the entire length of the workpiece 100 in the course of the movement. The notch is formed on the surface.

  The grinding tool cover 26 covers both the grinding tools 22 and 24 and a portion of the workpiece 100 around the grinding tools 22 and 24, and the discharge nozzle of the discharge unit (not shown) is provided therein. It is provided to prevent grinding water generated from grinding by the cooling water discharged from and grinding by the grinding tools 22 and 24 from scattering to the surroundings. The grinding tool cover 26 is formed in a substantially rectangular box shape, and has openings 26 a for inserting the workpiece 100 into both side walls in the axial direction of the workpiece 100. The grinding tool cover 26 is configured to reciprocate in the axial direction of the workpiece 100 together with the grinding tools 22 and 24 by the grinding tool drive mechanism 34, while the grinding tools 22 and 24 are moving. Prevents grinding waste and cooling water from splashing outside during the grinding process.

  As shown in FIG. 5, a bellows-like bellows cover 26 c that can expand and contract in the axial direction of the workpiece 100 is provided on each side wall portion of the grinding tool cover 26. Each bellows cover 26c is provided so as to cover the periphery of the workpiece 100 protruding from each opening 26a of the grinding tool cover 26, and in the axial direction of the workpiece 100 by a cylinder 26d installed on the upper portion thereof. It is designed to expand and contract. By covering the outer side of the opening 26a of the grinding tool cover 26 with the bellows cover 26c, leakage of the cooling water and polishing debris is more effectively prevented.

  Further, as shown in FIG. 1, a window portion 26f is provided on the front wall portion of the grinding tool cover 26 so that the grinding state of the workpiece 100 in the grinding tool cover 26 can be observed through the window portion 26f. It has become. A drainage portion 26h for discharging the cooling water discharged in the grinding tool cover 26 and accumulated on the bottom portion is provided at the bottom portion of the grinding tool cover 26.

  The discharge portion (not shown) is for discharging cooling water to the grinding points of the two grinding tools 22 and 24 to cool the grinding points and the grinding tools 22 and 24 and to wash away grinding debris. This discharge part has a water supply pipe (not shown) disposed from the outside to the inside of the grinding tool cover 26 and a discharge nozzle (not shown) attached to the tip of the water supply pipe. The discharge nozzle is attached in the vicinity of both the grinding tools 22 and 24 and is arranged in a posture capable of discharging cooling water toward the grinding portion of the workpiece 100 by both the grinding tools 22 and 24.

  The water injection unit 30 sprays water on the surface of the workpiece 100 from the periphery of the workpiece 100 toward the inside of the grinding tool cover 26. The water ejecting unit 30 is included in the concept of the fluid ejecting unit of the present invention. A plurality of water injection portions 30 are provided in each of the openings 26a and 26a of the grinding tool cover 26. The plurality of water injection portions 30 are arranged in the circumferential direction of the workpiece 100 as shown in FIG. They are arranged at equal intervals. In this way, water is sprayed from the plurality of water injection portions 30 arranged so as to surround the outer periphery of the workpiece 100, whereby water curtains are formed in both openings 26 a and 26 a of the grinding tool cover 26, respectively. Cooling water discharged from the discharge nozzle of the discharge unit in the cover 26 and grinding waste generated by grinding by the two grinding tools are prevented from leaking outside through the openings 26a and 26a. In addition, as shown in FIG. 5, each water injection part 30 can be arrange | positioned with the attitude | position inclined so that the front-end | tip part may face the inner side of the grinding tool cover 26 in the axial direction of the to-be-processed object 100. As shown in FIG.

  The brush 32 is provided outside the both openings 26 a and 26 a of the grinding tool cover 26 so as to surround the outer periphery of the workpiece 100. The brush 32 contacts the surface of the workpiece 100 as shown in FIG. 5, and adheres to the surface of the workpiece 100 as the grinding tool cover 26 moves in the axial direction of the workpiece 100. It removes grinding scraps.

  The grinding tool drive mechanism 34 moves both the grinding tools 22, 24 and the grinding tool cover 26 in the axial direction of the workpiece 100.

  As shown in FIG. 3, the grinding tool drive mechanism 34 includes a grinding tool feed screw 36, a grinding tool drive source 38, a grinding tool support portion 40, a grinding tool base portion 42, and a grinding tool nut portion 44. Have.

  The grinding tool feed screw 36 is provided at a position below the waterproof cover 14 and at a position between the pair of guide portions 4, 4 so as to extend in the axial direction of the workpiece 100. . The grinding tool feed screw 36 is supported by bearings 37a and 37b installed on the bed 2 so as to be rotatable about an axis.

  The grinding tool drive source 38 is a motor that rotates the grinding tool feed screw 36 about its axis. The grinding tool drive source 38 is installed on an end portion of the bed 2 on the second support portion 8 side, and is coupled to a corresponding one end portion of the grinding tool feed screw 36.

  The grinding tool support portion 40 supports the grinding tools 22 and 24 and the grinding tool cover 26. The grinding tool support 40 is provided on the back side of the grinding tool cover 26. A surface grinding tool motor 41a for rotating the surface grinding tool 22 is provided on the back side of the grinding tool support 40, and the notch grinding tool is provided above the grinding tool support 40. A notch portion grinding tool motor 41 b for rotating 24 is provided.

  The grinding tool base portion 42 is coupled to the grinding tool support portion 40 and is guided by the pair of guide portions 4 and 4 while avoiding interference with the waterproof cover 14, thereby causing the workpiece 100 to move in the axial direction. It is possible to move to.

  Specifically, the grinding tool base portion 42 includes a grinding tool interference avoiding portion 42a and a grinding tool guided portion 42b.

  The grinding tool interference avoiding portion 42 a is configured to avoid interference with the waterproof cover 14, and a portion where the grinding tool support portion 40 is coupled to the upper side of the waterproof cover 14 and a lower side of the waterproof cover 14 are provided. And a portion arranged so as to pass through.

  The grinding tool interference avoiding portion 42a includes a grinding tool mounting portion 42c, a pair of grinding tool extending portions 42d and 42d, and a grinding tool connecting portion 42e.

  The grinding tool mounting portion 42 c is disposed so as to cover the upper portion of the waterproof cover 14 at a position below the grinding tool cover 26. The grinding tool mounting portion 42 c is a flat plate that is horizontally arranged, and is provided over the bed 2 and a predetermined range on the back side of the bed 2. The grinding tool support portion 40 is mounted on a portion of the grinding tool mounting portion 42c that protrudes to the back side of the bed 2.

  Each of the grinding tool extending portions 42d extends from a portion located on both outer sides in the width direction of the waterproof cover 14 to a position below the lower end portion of the waterproof cover 14 in the grinding tool mounting portion 42c. ing.

  The grinding tool connecting portion 42e connects the pair of grinding tool extending portions 42d and 42d to each other below the waterproof cover 14. The grinding tool connecting portion 42e includes a grinding tool inner extending portion 42f extending inward in the width direction from a lower end portion of each grinding tool extending portion 42d, and a width inner side of each grinding tool inner extending portion 42f. Grinding tool start-up portion 42g raised vertically from the end of each of the two and the upper ends of both grinding tool start-up portions 42g, 42g are connected to each other under the waterproof cover 14 in a horizontally disposed flat plate-shaped grinding It is comprised by the tool flat plate part 42h.

  The grinding tool mounting portion 42c and the grinding tool flat plate portion 42h are arranged above and below the cover portion 14a of the waterproof cover 14, and each grinding tool extending portion 42d and each grinding tool rising portion 42g are waterproof. The cover 14 is disposed on both sides of the cover extending portion 14b. The grinding tool interference avoiding portion 42a is formed in a closed cross-sectional structure surrounding the waterproof cover 14 by the grinding tool mounting portion 42c, the pair of grinding tool extending portions 42d and 42d, and the grinding tool connecting portion 42e configured as described above. Yes.

  The grinding tool guided portion 42b is guided by the pair of guide portions 4 and 4, respectively, and is a portion of the grinding tool interference avoiding portion 42a disposed so as to pass under the waterproof cover 14. That is, it is provided at a position corresponding to each guide portion 4 on the bottom surface of the grinding tool flat plate portion 42h. Each grinding tool guided portion 42b is configured in the same manner as the second support portion guided portion 8f, and can be moved relative to the corresponding guide portion 4 in the longitudinal direction, that is, in the axial direction of the workpiece 100. It has become. When the grinding tool guided portion 42b moves relative to the guide portion 4, the grinding tool base portion 42, the grinding tool support portion 40, the two grinding tools 22, 24, and the grinding tool cover 26 become the workpiece 100. It is guided in the axial direction.

  The grinding tool nut portion 44 is provided on the bottom surface of the grinding tool flat plate portion 42 h and is screwed with the grinding tool feed screw 36.

  Since the grinding tool drive mechanism 34 is configured as described above, the grinding tool feed screw 36 is rotated forward and backward around the axis by the grinding tool drive source 38, and the grinding tool base portion together with the grinding tool nut portion 44. 42, the grinding tool support 40, the grinding tools 22, 24, and the grinding tool cover 26 can be reciprocated in the axial direction of the workpiece 100 along the grinding tool feed screw 36.

  The conveyance device 18 conveys the workpiece 100 to a set position between the first support portion 6 and the second support portion 8, and is attached to a side portion on the front side of the bed 2. Yes.

  Specifically, the transport device 18 includes a gripping portion 18a that grips the workpiece 100, a reversing mechanism 18b that reverses the gripping portion 18a, a reversing mechanism 18b, and a gripping portion 18a. A reversing mechanism 18b and a moving mechanism 18c for moving the gripping portion 18a are provided in the direction of moving toward and away from the bed 2 from the front side.

  In this transport device 18, after gripping the workpiece 100 with the gripping portion 18 a facing the outside in the width direction of the bed 2 at a position away from the bed 2, the gripping portion 18 a is moved in the width direction of the bed 2 by the reversing mechanism 18 b. The workpiece 100 held by the gripping portion 18a is placed at the set position when the gripping portion 18a and the reversing mechanism 18b are both moved in the direction approaching the bed 2 by the moving mechanism 18c. The After the workpiece 100 is supported by the support portions 6 and 8, the gripping portion 18a separates the workpiece 100, and the gripping portion 18a and the reversing mechanism 18b that are not gripping the workpiece 100 move. It is retracted from the bed 2 by the mechanism 18c.

  The control device 20 is for controlling the operation of each part of the grinding apparatus, and the operation control of each part is performed by an electric signal sent from the control device 20.

  Next, an operation when performing surface grinding of the workpiece 100 in the grinding apparatus according to the present embodiment will be described.

  In the grinding apparatus according to the present embodiment, the workpiece 100 is transported to the set position by the transport device 18, and the second support portion feed screw 10 is rotated by the second support portion drive source 12, whereby the second support portion 8 is moved. It moves to the 1st support part 6 side, being guided by the guide parts 4 and 4, and the 2nd rotation part 8d of the 2nd holding | maintenance part 8a presses the edge part of the to-be-processed body 100 to the 1st support part 6 side. As a result, the workpiece 100 is sandwiched between the first holding portion 6a of the first support portion 6 and the second holding portion 8a of the second support portion 8 so as to be rotatable about its axis. At this time, the guide portions 4 and 4 are positioned below the workpiece 100, and the second holding portion 8a presses the end of the workpiece 100 at a position between the guide portions 4 and 4 in the horizontal direction. Further, since the first holding part 6a and the second holding part 8a hold the workpiece 100 so that the axis of the workpiece 100 is located immediately above the axis of the second support part feed screw 10, the first holding part 6a and the second holding part 8a 2 The pressing force applied to the end of the workpiece 100 from the holding portion 8a is less likely to work in an oblique direction with respect to the axial direction of the workpiece 100, and the workpiece 100 is less likely to be displaced.

  Next, the workpiece 100 is rotated together with the first rotating part and the second rotating part 8d (not shown) by driving the first holding part drive motor 6b and the second holding part drive motor (not shown). Thereafter, the surface grinding tool 22 is rotated by driving the surface grinding tool motor 41 a, and the surface grinding of the workpiece 100 is performed by the surface grinding tool 22. The surface grinding is performed while the grinding tool feed screw 36 is rotated by the grinding tool driving source 38 and the grinding part 16, that is, the surface grinding tool 22 and the grinding tool cover 26 are moved in the axial direction of the workpiece 100. .

  At this time, in the grinding tool cover 26, cooling water is discharged from the discharge nozzle of the discharge portion (not shown) to the grinding location of the surface grinding tool 22, and the grinding location is cooled and the grinding waste is washed away. In addition, water is sprayed from the water injection unit 30 onto the peripheral surface of the workpiece 100 at both openings 26a and 26a of the grinding tool cover 26 to form a water curtain, and the exterior of the grinding tool cover 26 is formed through the openings 26a and 26a. Leakage of the cooling water and the grinding scraps is suppressed. As described above, surface grinding of the workpiece 100 is performed by the grinding apparatus of the present embodiment.

  As described above, in the present embodiment, the second support portion 8 is moved in the axial direction of the workpiece 100 by the pair of guide portions 4 and 4 and the second support portion feed screw 10 disposed below the grinding tool cover 26. By moving the workpiece 100 to the first support portion 6, the end portion of the workpiece 100 is pressed toward the first support portion 6, and the workpiece 100 is sandwiched between the first support portion 6 and the first support portion 6. The first holding portion 6a and the second holding portion 8a of the second support portion 8 hold each end portion of the workpiece 100 at a position between the pair of guide portions 4 and 4 in the horizontal direction. For this reason, compared with the structure where the guide part and the feed screw are offset from the lower side of the workpiece 100 to the outside in the width direction, the guide parts 4 and 4 and the second support part feed of the second support part 6 are arranged. The distance between the part actually moved by the screw 10 and the second holding portion 6a that presses and holds the end portion of the workpiece 100 can be shortened. Thereby, the support rigidity of the to-be-processed object 100 in the 2nd support part 6 can be improved, and when the edge part of the to-be-processed object 100 is pressed and hold | maintained with the 2nd holding | maintenance part 8a, it becomes 2nd support part 8. The bending which arises can be made small. As a result, the positional deviation of the workpiece 100 can be reduced, and a decrease in the grinding accuracy of the workpiece 100 can be suppressed.

  Further, in the present embodiment, the pair of guide portions 4 and 4 and the second support portion feed screw 10 are provided below the grinding tool cover 26, but at a position below the grinding tool cover 26 by the waterproof cover 14. Since the upper portions of the guide portions 4 and 4 and the second support portion feed screw 10 are covered, even when cooling water discharged from the discharge portion (not shown) leaks out of the grinding tool cover 26 and falls, It is possible to prevent the water from splashing on the guide parts 4, 4 and the second support part feed screw 10 by blocking the water with the waterproof cover 14. Therefore, in this embodiment, the workpiece 100 is prevented from being splashed with water on the guide portions 4 and 4 and the second support portion feed screw 10 for moving the second support portion 8 that supports the workpiece 100. It is possible to suppress a decrease in grinding accuracy.

  In the present embodiment, the second support portion base portion 8b is guided by the guide portions 4 and 4 while avoiding interference with the waterproof cover 14, and the second support portion flat plate portion of the second support portion base portion 8b. Since the second support portion nut portion 8c screwed with the second support portion feed screw 10 is provided on the bottom surface of 8m, the second holding portion 8a of the second support portion 8 is located above the waterproof cover 14. Even in the configuration that holds the end portion of the workpiece 100, the guide portions 4, 4 disposed below the waterproof cover 14 and the second support portion feed screw 10 while avoiding interference with the waterproof cover 14. The second support portion 8 can be moved in the axial direction of the workpiece 100 to press the end portion of the workpiece 100 toward the first support portion 6 side.

  In the present embodiment, the first holding unit 6 a and the second holding unit 8 a hold the workpiece 100 such that the axis of the workpiece 100 is positioned immediately above the axis of the second support portion feed screw 10. Hold. For this reason, the distance between the part actually moved by the second support part feed screw 10 in the second support part 8 and the second holding part 8a that presses and holds the end of the workpiece 100 is further increased. Since it can shorten, the support rigidity of the to-be-processed object 100 in the 2nd support part 8 can be improved more.

  In the present embodiment, the second support portion interference avoiding portion 8e of the second support portion base portion 8b includes a second holding portion mounting portion 8g that covers the top of the waterproof cover 14, and the second holding portion mounting portion 8g. A pair of second support portion extending portions 8h, 8h each extending from a portion located on both outer sides in the width direction of the waterproof cover 14 to a position below the lower end portion of the waterproof cover 14, and the pair of first 2 Since the second support portion extending portions 8h and 8h are connected to each other on the lower side of the waterproof cover 14, the second support portion interference avoiding portion 8e has a closed cross-sectional structure surrounding the waterproof cover 14. Can be formed. For this reason, the rigidity of the 2nd support part base part 8b can be improved.

  Further, in the present embodiment, the water injection unit 30 that sprays water from the periphery of the workpiece 100 toward the inside of the grinding tool cover 26 to the surface of the workpiece 100 is provided in the opening 26 a of the grinding tool cover 26. Therefore, it is possible to prevent the cooling water from leaking to the outside of the grinding tool cover 26 through the opening 26 a by the water curtain formed by the water sprayed from the water injection unit 30. Thereby, it is possible to more reliably prevent water from splashing on the guide portions 4, 4 and the second support portion feed screw 10 due to leakage of water to the outside of the grinding tool cover 26.

  In the present embodiment, since the grinding tool feed screw 36 is provided at a position below the waterproof cover 14 and between the guide portions 4, 4, the grinding cover feed screw is provided by the waterproof cover 14. The upper part of 36 is covered. For this reason, even if cooling water leaks out of the grinding tool cover 26 and falls, the water can be blocked by the waterproof cover 14 to prevent the grinding tool feed screw 36 from being splashed with water.

  In the present embodiment, the grinding tool base 42 is guided to the guide parts 4 and 4 while avoiding interference with the waterproof cover 14, and the grinding tool base part 42h of the grinding tool base part 42 has a grinding tool on the bottom surface thereof. Since the grinding tool nut portion 44 to be screwed with the feed screw 36 is provided, even if the grinding tools 22 and 24 and the grinding tool cover 26 are provided at a position above the waterproof cover 14, The grinding tools 22, 24 and the grinding tool cover 26 can be moved in the axial direction of the workpiece 100 by the guide portions 4, 4 arranged below the waterproof cover 14 and the grinding tool feed screw 36 while avoiding interference. it can.

  Moreover, in this embodiment, since the guide parts 4 and 4 can be shared in order to guide the 2nd support part 8, the grinding tools 22 and 24, and the grinding tool cover 26 to the axial direction of the to-be-processed object 100, The number of parts can be reduced as compared with the case where the guide portion for the second support portion 8 and the guide portions for the grinding tools 22 and 24 and the grinding tool cover 26 are provided individually.

  In the present embodiment, the grinding tool interference avoiding portion 42a of the grinding tool base portion 42 includes both the grinding tool mounting portion 42c that covers the top of the waterproof cover 14 and the width direction of the waterproof cover 14 in the grinding tool mounting portion 42c. A pair of grinding tool extending portions 42d and 42d extending from a portion located outside to a position below the lower end portion of the waterproof cover 14 and the pair of grinding tool extending portions 42d and 42d are waterproofed. Since the grinding tool connecting portion 42e is connected to the lower side of the cover 14, the grinding tool interference avoiding portion 42a can be formed in a closed cross-sectional structure surrounding the waterproof cover 14. For this reason, the rigidity of the grinding tool base 42 can be improved.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

  For example, in the above embodiment, the water injection unit 30 is provided to prevent leakage of cooling water and grinding debris at the opening 26a of the grinding tool cover 26. However, instead of the water injection unit 30, a fluid other than water is injected. In addition, a fluid ejecting unit that prevents leakage of cooling water and grinding scraps may be provided. For example, you may provide the air injection part which forms the air curtain for spraying air from the circumference | surroundings of the to-be-processed object 100 in the said opening part 26a, and preventing the leakage of the said cooling water and grinding | polishing waste.

  Moreover, in the said embodiment, although the to-be-processed body 100 was hold | maintained so that the axial center of the to-be-processed body 100 might be located just above the axial center of the 2nd support part feed screw 10, in a horizontal direction, a pair of guide part 4, If the workpiece 100 is supported at a position between 4, the axis of the workpiece 100 may be slightly deviated from the position immediately above the axis of the second support portion feed screw 10.

It is the perspective view which looked at the grinding device by one embodiment of the present invention from the front side. It is a top view for demonstrating arrangement | positioning of the 2nd support part feed screw and the grinding tool feed screw in the grinding apparatus shown in FIG. It is a longitudinal cross-sectional view of the direction perpendicular | vertical to the axial direction of the to-be-processed body in the grinding tool cover of the grinding apparatus shown in FIG. It is a longitudinal cross-sectional view of the direction perpendicular | vertical to the axial direction of the to-be-processed body in the 2nd support part of the grinding device shown in FIG. It is a longitudinal cross-sectional view along the axial direction of the to-be-processed body of the part of the vicinity of a grinding tool cover.

Explanation of symbols

4 Guide part 6 1st support part 6a 1st holding part 8 2nd support part 8a 2nd holding part 8b 2nd support part base part 8c 2nd support part nut part 8e 2nd support part interference avoidance part 8f 2nd support part Guided portion 8g Second holding portion mounting portion 8h Second support portion extending portion 8i Second support portion connecting portion 10 Second support portion feed screw 12 Second support portion drive source 14 Waterproof cover 22 Surface grinding tool (grinding tool)
26 Grinding tool cover 26a Opening 30 Water jet part (fluid jet part)
34 grinding tool drive mechanism 36 grinding tool feed screw 38 grinding tool drive source 40 grinding tool support portion 42 grinding tool base portion 42a grinding tool interference avoiding portion 42b grinding tool guided portion 42c grinding tool mounting portion 42d grinding tool extending portion 42e grinding Tool connecting portion 44 Grinding tool nut portion 100 Workpiece

Claims (8)

A grinding device that performs surface grinding while rotating a workpiece, which is an ingot extending in a specific direction, about an axis,
A grinding tool for grinding the surface of the workpiece while moving in the axial direction of the workpiece;
A grinding tool cover that covers the grinding tool and a portion of the workpiece around the grinding tool, and moves in the axial direction of the workpiece together with the grinding tool;
A discharge unit provided in the grinding tool cover, for discharging water to a grinding portion of the grinding tool;
A first support portion that supports one end portion of the workpiece in the axial direction so as to be rotatable around the axis;
By pressing the other end portion of the workpiece in the axial direction toward the first support portion, the workpiece is sandwiched between the first support portion and the other end portion is rotated about the axis. A second support portion for supporting the second support portion;
A pair of guides extending in the axial direction of the workpiece at a position below the grinding tool cover and spaced apart from each other in the horizontal direction to guide the second support portion in the axial direction of the workpiece. And
A second support part feed screw provided at a position between the pair of guide parts in the horizontal direction and extending in the axial direction of the workpiece;
A second support drive source for rotating the second support feed screw about an axis;
A waterproof cover provided to cover above the pair of guide portions and the second support portion feed screw at a position below the grinding tool cover,
The first support portion includes a first holding portion that holds one end portion of the workpiece at a position between the pair of guide portions in the horizontal direction at a position above the waterproof cover,
The second support portion includes a second holding portion that holds the other end portion of the workpiece at a position between the pair of guide portions in the horizontal direction at a position above the waterproof cover, and the second holding portion. And a second support portion base portion guided by the pair of guide portions while avoiding interference with the waterproof cover, provided on the second support portion base portion, and the second support portion feed screw, have a second support portion nut screwed,
The first holding portion is a portion of the first holding portion that holds the one end portion of the workpiece at a position between the pair of guide portions in the horizontal direction, and is configured to be rotatable. Part
The second holding part has a second rotating part that is configured to be a part of the second holding part that holds the other end part of the workpiece, and is configured to be rotatable. The workpiece is clamped between the first rotating part and the second rotating part by moving the second supporting part toward the first supporting part by the rotation of the second support part feed screw. The other end portion of the workpiece to be pressed toward the first rotating portion at a position between the pair of guide portions in the horizontal direction,
In a state where the workpiece is sandwiched between the first rotating portion and the second rotating portion, the first rotating portion and the second rotating portion rotate to rotate the workpiece around its axis. A grinding device that rotates .
  The said 1st holding | maintenance part and the said 2nd holding | maintenance part hold | maintain the said to-be-processed body so that the axial center of the said to-be-processed body may be located just above the axial center of the said 2nd support part feed screw. The grinding apparatus as described.   The second support portion base portion includes a second support portion interference avoiding portion having a portion that is coupled to the second holding portion and an upper side of the waterproof cover, and a portion that is disposed so as to pass under the waterproof cover. A second support portion guided portion provided in a portion of the second support portion interference avoidance portion disposed so as to pass under the waterproof cover and guided by the respective guide portions. Item 3. The grinding apparatus according to Item 1 or 2. The second support portion interference avoidance portion covers the upper portion of the waterproof cover and has a second holding portion mounting portion on which the second holding portion is mounted, and the width direction of the waterproof cover in the second holding portion mounting portion. The pair of second support portion extending portions extending from the portions located on both outer sides to the position below the lower end portion of the waterproof cover, and the pair of second support portion extending portions are waterproofed. A second support portion connecting portion connected to each other on the lower side of the cover,
The grinding device according to claim 3, wherein the second support portion guided portion and the second support portion nut portion are provided in the second support portion connecting portion. The grinding tool cover has an opening for inserting the workpiece,
Any one of Claims 1-4 in which the fluid injection part which sprays a fluid on the surface of the to-be-processed body from the circumference | surroundings of the to-be-processed body toward the inner side of the said grinding tool cover is provided in the opening part. The grinding apparatus according to item. A grinding tool drive mechanism for moving the grinding tool and the grinding tool cover in the axial direction of the workpiece;
The grinding tool drive mechanism is provided at a position below the waterproof cover and between the pair of guide parts, and extends in the axial direction of the workpiece, and the grinding tool A grinding tool drive source for rotating a tool feed screw about an axis, a grinding tool support for supporting the grinding tool and the grinding tool cover, and a coupling with the grinding tool support, and avoiding interference with the waterproof cover The grinding tool base portion guided by the pair of guide portions, and the grinding tool nut portion provided on the grinding tool base portion and screwed with the grinding tool feed screw. 2. The grinding apparatus according to item 1.   The grinding tool base portion includes a grinding tool interference avoiding portion having a portion that is coupled to the grinding tool support portion on the upper side of the waterproof cover, and a portion that is disposed so as to pass under the waterproof cover, and the grinding tool thereof The grinding apparatus according to claim 6, further comprising: a grinding tool guided portion provided in a portion of the interference avoiding portion disposed so as to pass under the waterproof cover, and guided by the guide portions. The grinding tool interference avoiding portion covers the upper portion of the waterproof cover and has a grinding tool mounting portion on which the grinding tool support portion is mounted, and portions located on both outer sides in the width direction of the waterproof cover in the grinding tool mounting portion. A pair of grinding tool extending portions extending from the lower end of the waterproof cover to a position below the lower end of the waterproof cover, and a grinding tool for connecting the pair of grinding tool extending portions to each other below the waterproof cover A connecting portion,
The grinding apparatus according to claim 7, wherein the grinding tool guided portion and the grinding tool nut portion are provided in the grinding tool connecting portion.

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