JP2018176374A - Honing processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a honing processing device that can prevent processing defect caused by processing chips in applying honing processing to inner peripheral surfaces of a plurality of components collectively.SOLUTION: The honing processing device applies honing processing to cylindrically-shaped inner peripheral surfaces 112 of a plurality of components (con rods 110) collectively with the inner peripheral surfaces 112 arranged coaxially. Between the plurality of con rods 110 is arranged a support plate 11. The support plate 11 has a hole 11a into which a honing head 1 is inserted, a coolant supply path A1 through which coolant is supplied to a space S between an inner peripheral surface of the hole 11a and an outer peripheral surface of a honing head 1, and coolant discharge paths B1 and B2 through which the coolant supplied to the space S is discharged.SELECTED DRAWING: Figure 7

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a honing apparatus that performs honing processing collectively on the inner peripheral surfaces of a plurality of parts.

  Honing processing is known as a method of finishing the inner peripheral surface of parts with high precision. For example, the connecting rod (hereinafter referred to as connecting rod) connecting the piston of the engine and the crankshaft performs honing on the inner peripheral surfaces of the large end and the small end in order to reduce sliding resistance and improve fuel consumption. (See, for example, Patent Document 1 below).

JP, 2010-208004, A

  The honing process is performed using a honing head 120 as shown in FIG. The honing head 120 is provided with a cylindrical main body 122 and a plurality of grindstones 124 which can protrude from the outer peripheral surface of the main body 122 to the outer diameter. The honing head 120 is inserted into a hole provided in a component (for example, the connecting rod 110), and the honing head 120 is moved up and down while rotating the honing head 120 with the grindstone 124 of the honing head 120 pressed against the inner circumferential surface 112 of the connecting rod 110. As a result, the inner circumferential surface 112 of the connecting rod 110 is polished.

  For example, as shown in FIG. 10, a plurality of connecting rods 110 are overlapped and the inner peripheral surface 112 of each connecting rod 110 is coaxially arranged, and the inner peripheral surface 112 of each connecting rod 110 is collectively processed with one honing head. Processing efficiency is enhanced. However, if the heights of the end surfaces of the large end 114 and the small end 116 of the connecting rod 110 are slightly different due to a processing error or the like, when the end surfaces of the connecting rod 110 are overlapped, the large end 114 or the small end A gap δ is generated between the end faces of the portion 116 (in the illustrated example, the small end portion 116). When the end faces are brought into contact with each other by filling the gap δ, the concentricity of the holes of the plurality of connecting rods 110 is reduced, so that the processing accuracy of the holes is reduced. Therefore, it is necessary to hold the gap δ between both connecting rods 110 and to perform honing processing while maintaining the coaxiality of the holes of both connecting rods 110. Thus, the minute gap δ between both connecting rods 110 is thus maintained It is not easy to do honing while doing so.

  For example, as shown in FIG. 11, by attaching each connecting rod 110 to a cassette (jig), each connecting rod 110 is supported from the lower side by the support plates 131 and 132 of the cassette. Fine adjustment of the position and posture is facilitated, and the inner circumferential surfaces 112 of the plurality of connecting rods 110 can be easily disposed coaxially. Each support plate 131, 132 is provided with holes 131a, 132a for the honing head 120 to pass through.

  However, as shown in FIG. 11, when the honing head 120 is raised to a position where the entire grindstone 124 is pulled upward from the hole of the lower connecting rod 110, the honing head 120 is subsequently lowered to lower the hole of the lower connecting rod 110. When inserted in the inner circumference of the lower end of the connecting rod 110, the grinding wheel 124 may interfere with the upper end opening of the hole of the lower connecting rod 110 (see dotted line).

  For this reason, as shown in FIGS. 12A and 12B, it is necessary to raise and lower each honing head 120 while maintaining the state in which the grinding stone 124 is in contact with the inner circumferential surface 112 of both connecting rods 110. In this case, since the honing head 120 is always inserted into the hole 131a of the support plate 131 disposed between the connecting rods 110, the inner peripheral surface of the hole 131a of the support plate 131 and the outer periphery of the honing head 120. The gap S between the surfaces is substantially closed. For this reason, the processing wastes accumulated in the above-mentioned gap S are difficult to be discharged, and when the grinding stone 124 is clogged by the processing wastes, there is a possibility that the processability is lowered and the processing failure is caused.

  The above circumstances occur not only in the honing process of the connecting rod, but also in the case of performing the honing process collectively on the inner peripheral surfaces of a plurality of parts.

  Therefore, the present invention has an object to prevent processing defects caused by machining waste when performing honing processing collectively on the inner circumferential surfaces of a plurality of parts.

  In order to solve the above-mentioned subject, the present invention is a honing processing device which performs honing processing collectively to these inner skins in the state where cylindrical surface-like inner skins of a plurality of parts were arranged coaxially. A support plate disposed between the plurality of parts, the support plate being a coolant in a hole between which the honing head is inserted, and a clearance between an inner peripheral surface of the hole and an outer peripheral surface of the honing head And a coolant discharge path for discharging the coolant supplied to the gap.

  In this honing apparatus, the coolant is supplied to the gap between the inner peripheral surface of the hole of the support plate and the outer peripheral surface of the honing head through the coolant supply passage provided on the support plate, and the gap is supplied to this gap The coolant can be discharged to the outside through a coolant discharge path provided in the support plate. As a result, since the processing waste accumulated in the above-mentioned gap can be discharged to the outside together with the coolant, processing defects caused by the processing waste can be prevented.

  If the gap between the inner peripheral surface of the hole of the support plate and the outer peripheral surface of the honing head is small, the flow path area of the above-mentioned gap becomes small and the coolant becomes difficult to flow, which may reduce the removal efficiency of machining debris. There is. Therefore, a recessed groove is provided on the inner peripheral surface of the hole of the support plate, and a communication path connecting the coolant supply path and the coolant discharge path is formed by the gap between the recessed groove and the honing head. Then, since the flow passage area of the communication passage is secured, the coolant can be sufficiently supplied to the above-mentioned gap to efficiently remove the machining debris.

  For example, if the diameter of the hole of the support plate is increased and the radial width of the gap is increased, the flow passage area of the gap can be increased. However, in this case, since the area of the end face of the support plate is reduced, the contact area between the end face of the support plate and the end face of the part is reduced, which may make the support of the part unstable.

  Then, it is preferable to provide the said ditch | groove in the thickness direction intermediate part of the said support plate among the internal peripheral surfaces of the said support plate. Thus, the recessed groove can be provided without reducing the area of the end face of the support plate, so that the contact area between the end face of the support plate and the end face of the component can be secured to support the component stably.

  As described above, according to the present invention, processing defects can be prevented when performing honing processing collectively on the inner peripheral surfaces of a plurality of parts.

It is a side view of a honing processing device. It is a top view of a honing processing device. (A) is a top view of a 1st cassette, (B) is sectional drawing in the BB line of (A) figure. It is a cross-sectional perspective view in the IV-IV line of the support plate of the 1st cassette shown to FIG. 3 (A). (A) is a top view of a 2nd cassette, (B) is sectional drawing in the BB line of (A) figure. (A) is a plan view of a lid, and (B) is a side view of the same. It is sectional drawing in the VII-VII line of FIG. It is a top view of the hole vicinity of the support plate of a 1st cassette. It is sectional drawing which shows the mode of the honing process of the conventional connecting rod. It is sectional drawing which shows the state which accumulated two connecting rods. It is sectional drawing which shows a mode (reference example) which performs honing processing collectively to the internal peripheral surface of two connecting rods. It is sectional drawing which shows a mode (reference example) which performs a honing process collectively to the inner peripheral surface of two connecting rods, (A) is the state which arranged the honing head in the rise end position, (B) is a honing head. The state where it is arranged at the falling end position is shown.

  Hereinafter, embodiments of the present invention will be described based on the drawings.

  As shown in FIGS. 1 and 2, the honing apparatus according to the present embodiment includes the honing head 1 and a fixing jig 2 for fixing a plurality of works. In the present embodiment, the case where the inner peripheral surface 112 of the small end portion 116 of the plurality (two in the illustrated example) of the connecting rod 110 is subjected to the honing process collectively is shown.

  The honing head 1 includes a cylindrical main body 1a and a plurality of (four in the illustrated example) grinding wheels 1b that can protrude from the outer peripheral surface of the main body 1a. Inside the main body 1a, a mechanism (not shown) for adjusting the amount of protrusion of the grindstone 1b is provided. The honing head 1 is rotationally driven by a drive unit (not shown) and is driven in the axial center direction of the main body 1a (in the vertical direction in the present embodiment).

  The fixing jig 2 includes a first cassette 10, a second cassette 20, and a lid 30. The connecting rods 110 are set in the first cassette 10 and the second cassette 20 in a flat state (the axial centers of the holes of the large end portion 114 and the small end portion 116 are in the vertical direction).

  As shown in FIG. 3, the first cassette 10 includes a support plate 11, a pair of guide plates 12, and a restriction member 13.

  The connecting rod 110 is mounted on the upper surface of the support plate 11 and supports the entire circumference of the end face of the large end 114 and the small end 116 of the connecting rod 110 from below. The support plate 11 is provided with a hole 11 a which penetrates in the thickness direction and into which the honing head 1 is inserted. The inner peripheral surface of the hole 11a has a cylindrical surface shape. A recessed groove 11a1 is provided on the inner peripheral surface of the hole 11a. In the present embodiment, as shown in FIG. 4, an annular recessed groove 11 a 1 is provided in the middle in the vertical direction (thickness direction of the support plate 11) of the inner peripheral surface of the hole 11 a.

  As shown to FIG. 3 (A) (B), the flow path 11b which functions as a coolant supply path mentioned later in the inside of the support plate 11 is provided. In the present embodiment, a pair of flow paths 11 b is provided on both sides in the diameter direction of the hole 11 a of the support plate 11. The flow path 11b includes a horizontal portion 11b1 extending in the horizontal direction and a vertical portion 11b2 extending in the thickness direction. One end of the horizontal portion 11b1 opens to the inner peripheral surface of the hole 11a, and in the illustrated example, opens to the bottom surface of the recessed groove 11a1. The other end of the horizontal portion 11b1 communicates with the vertical portion 11b2.

  The support plate 11 is provided with a notch 11 c as a flow path that functions as a coolant discharge path described later. The notch 11 c extends outward from the hole 11 a and penetrates the support plate 11 in the thickness direction. In the illustrated example, a pair of notches 11 c are provided on both sides in the diameter direction of the hole 11 a of the support plate 11. One end of the notch 11c opens at the inner peripheral surface of the hole 11a, and in particular, opens at a circumferential position different from the opening of the flow passage 11b.

  The pair of guide plates 12 is fixed to both ends in the width direction (short side direction) of the upper surface of the support plate 11, and performs positioning of the large end portion 114 of the connecting rod 110 in the width direction. Grooves 12 a functioning as a coolant discharge path described later are provided on the upper and lower surfaces of the guide plate 12. In a plan view shown in FIG. 3A, the groove 12 a of the guide plate 12 partially overlaps the notch 11 c of the support plate 11. That is, the space in the notch 11 c of the support plate 11 is in direct communication with the gap between the groove 12 a on the lower surface of the guide plate 12 and the upper surface of the support plate 11. The guide plate 12 is provided with a pair of through holes 12 b communicating with the flow path 11 b of the support plate 11.

  The restriction member 13 is provided on the upper surface of the support plate 11 between the pair of guide plates 12 in the width direction. The restricting member 13 has a substantially U-shaped restricting portion 13 a surrounding the hole 11 a of the support plate 11. The restricting portion 13a performs approximate positioning in the width direction of the small end portion 116 of the connecting rod 110, and restricts the connecting rod 110 from being pushed further to the back side (the opposite side to the large end portion 114).

  The second cassette 20 has substantially the same configuration as the first cassette 10, and includes a support plate 21, a pair of guide plates 22, and a regulating member 23, as shown in FIG.

  The connecting rod 110 is placed on the upper surface of the support plate 21 and supports the entire circumference of the end face of the large end 114 and the small end 116 of the connecting rod 110 from below. The support plate 21 is provided with a hole 21a which penetrates in the thickness direction and into which the honing head 1 is inserted. The inner peripheral surface of the hole 21a has a cylindrical surface shape. An annular recessed groove 21a1 is provided at the lower end of the inner peripheral surface of the hole 21a.

  Inside the support plate 21, a flow path 21b functioning as a coolant supply path described later is provided. In the illustrated example, a pair of flow paths 21 b is provided on both sides in the diameter direction of the hole 21 a of the support plate 21. In the present embodiment, the flow path 21b includes a horizontal portion 21b1 extending in the horizontal direction and a vertical portion 21b2 extending in the thickness direction. One end of the horizontal portion 21b1 opens at the inner peripheral surface of the hole 21a, and in the illustrated example, opens at the boundary between the recessed groove 21a1 and the other area (small diameter portion) of the inner peripheral surface of the hole 21a. The other end of the horizontal portion 21b1 communicates with the vertical portion 21b2.

  The support plate 21 is provided with a notch 21c as a flow path that functions as a coolant discharge path described later. The notch 21c extends outward from the hole 21a and penetrates the support plate 21 in the thickness direction. In the illustrated example, a pair of notches 21 c are provided on both sides in the diameter direction of the hole 21 a of the support plate 21. One end of the notch 21c opens at the inner peripheral surface of the hole 21a, and in particular, opens at a circumferential position different from the opening of the flow passage 21b.

  The pair of guide plates 22 is fixed to both ends in the width direction (short side direction) of the upper surface of the support plate 21. Grooves 22 a functioning as a coolant discharge path described later are provided on the upper and lower surfaces of the guide plate 22. In a plan view shown in FIG. 5A, the groove 22a of the guide plate 22 partially overlaps the notch 21c of the support plate 21. That is, the space in the notch 21 c of the support plate 21 and the gap between the groove 22 a on the lower surface of the guide plate 22 and the upper surface of the support plate 21 are in direct communication. The guide plate 22 is provided with a pair of through holes 22 b communicating with the flow path 21 b of the support plate 21.

  The restricting member 23 is fixed on the upper surface of the support plate 21 between the pair of guide plates 22 in the width direction. The restricting member 23 has a substantially U-shaped restricting portion 23 a surrounding the hole 21 a of the support plate 21.

  The second cassette 20 is provided with a through hole 24 that penetrates the support plate 21 and the guide plate 22 in the thickness direction. In the present embodiment, the through holes 22 b and the through holes 24 provided in the guide plate 22 are disposed on the respective apexes of the square in a plan view shown in FIG. 5A.

  As shown in FIG. 6, the lid 30 is provided with a hole 31 penetrating in the thickness direction. A recessed groove 31 a is provided on the inner peripheral surface of the hole 31, and in the illustrated example, an annular recessed groove 31 a is provided on the upper end of the inner peripheral surface of the hole 31. A horizontally extending groove 32 is formed on the top surface of the lid 30. In the illustrated example, a groove 32 having the same width as the diameter of the concave groove 31a is formed.

  The lid 30 is provided with a flow path 33 which constitutes a coolant supply path described later. In the illustrated example, a pair of flow channels 33 is provided on both sides in the diameter direction of the hole 31. One end of the flow path 33 opens at the inner peripheral surface of the hole 31. The flow path 33 has a horizontal portion 33a extending in the horizontal direction inside the lid 30, and a vertical portion 33b extending in the vertical direction inside the lid. One end of the horizontal portion 33a opens to the inner peripheral surface of the hole 31, and the other end of the horizontal portion 33a communicates with the vertical portion 33b. The upper end of the vertical portion 33 b is closed, and the lower end of the vertical portion 33 b opens at the lower surface of the lid 30.

  After connecting rods 110 are set in the first cassette 10 and the second cassette 20 respectively, as shown in FIG. 1, the second cassette 20, the first cassette 10, and the lid 30 are stacked in this order from the bottom, and these are assembled Fixed and integrated by appropriate means of In the present embodiment, as shown in FIG. 2, the longitudinal directions of the cassettes 10 and 20 are orthogonal to each other about the axial center of the small end portion 116 of the connecting rod 110 set in the cassettes 10 and 20. Cassettes 10 and 20 are arranged. Thus, the pair of connecting rods 110 is attached to the fixing jig 2.

  In the state where the pair of connecting rods 110 is attached to the fixing jig 2, as shown in FIG. 7, the inner peripheral surface 112 of the small end 116 of both connecting rods 110 and the inside of the hole 11 a of the support plate 11 of the first cassette 10. The circumferential surface, the inner circumferential surface of the hole 21 a of the support plate 21 of the second cassette 20, and the inner circumferential surface of the hole 31 of the lid 30 are coaxially arranged. The inner circumferential surfaces of the holes 11a and 21a of the support plates 11 and 21 of the cassettes 10 and 20 and the inner circumferential surface of the hole 31 of the lid 30 are slightly smaller than the inner circumferential surface 112 of the small end 116 of each connecting rod 110 And the outer diameter side of the inner circumferential surface 112. The centering of the inner circumferential surface 112 of the small end portion 116 of each connecting rod 110 is performed by inserting a positioning pin into the inner periphery of the small end portion 116 of the pair of connecting rods 110 arranged in an overlapping manner.

  In this manner, by overlapping and fixing the cassettes 10 and 20 and the lid 30, the through hole 24 of the second cassette 20 and the flow path 11b of the support plate 11 of the first cassette 10 are communicated with each other. A first coolant supply path A1 for supplying the coolant is formed from the opening portion of the inner peripheral surface of the housing. The through hole 24 of the second cassette 20, the flow passage 11b of the support plate 11 of the first cassette 10, the through hole 12b of the guide plate 12 and the flow passage 33 of the lid 30 communicate with each other. A second coolant supply path A2 for supplying the coolant is formed from the opening of the inner peripheral surface 31 of the first part. Further, the flow path 21b of the support plate 21 of the second cassette 20 forms a third coolant supply path A3 for supplying the coolant from the opening of the inner peripheral surface of the hole 21a of the support plate 21.

  Further, the notch 11c of the support plate 11 of the first cassette 10, the gap between the groove 12a of the lower surface of the guide plate 12 of the first cassette 10 and the upper surface of the support plate 11, and the guide plate of the second cassette 20. The grooves 22a on the upper surface 22 and the gaps between the lower surface of the support plate 11 of the first cassette 10 communicate with each other to form a first coolant discharge path B1 and a second coolant discharge path B2. Further, the notch 21c of the support plate 21 of the second cassette 20 and the gap between the groove 22a of the lower surface of the guide plate 22 of the second cassette 20 and the upper surface of the support plate 21 communicate with each other to form a third coolant. The discharge path B3 is formed.

  Honing is applied to the plurality of connecting rods 110 mounted on the fixing jig 2 as described above. Specifically, with the honing head 1 inserted into the inner periphery of the connecting rod 110 and the grindstone 1b (see FIG. 1) pressed against the inner peripheral surface 112 of the small end portion 116 of each connecting rod 110, the honing head 1 is rotated. Raise and lower while making At this time, the grindstone 1b is always in contact with the inner circumferential surface 112 of both connecting rods 110 (see FIG. 12).

  During the honing process, coolant is supplied to the processing unit. Specifically, the coolant is supplied from the coolant supply unit (not shown) to the first coolant supply passage A1, the second coolant supply passage A2, and the third coolant supply passage A3, whereby the support plate of the first cassette 10 is provided. The coolant is supplied from the openings of the holes 11 a, the openings of the holes 31 of the lid 30, and the openings of the holes 21 a of the support plate 21 of the second cassette 20. As a result, the honing head 1 is cooled by the coolant, and it is possible to wash away the machining debris generated by the honing process with the coolant.

  The coolant supplied from the opening of the hole 11a of the support plate 11 of the first cassette 10 through the first coolant supply path A1 is mostly the first coolant discharge path B1 and the second coolant discharge. It is discharged to the outside through the passage B2. Further, most of the coolant supplied from the opening of the hole 31 of the lid 30 is discharged from the opening above the hole 31 via the second coolant supply path A2. Further, most of the coolant supplied from the opening of the hole 21a of the support plate 21 of the second cassette 20 through the third coolant supply path A3 is discharged from the opening below the hole 21a, Is discharged to the outside through the third coolant discharge path B3. In addition to the above, a flow path formed by the groove 12a on the upper surface of the guide plate 12 of the first cassette 10 and the lower surface of the lid 30, and the groove 22a on the upper surface of the guide plate 22 of the second cassette 20 and the first cassette 10 The coolant is discharged to the outside through the flow path formed by the lower surface of the support plate 11.

  As described above, in the case where the inner peripheral surface 112 of the small end portion 116 of the plurality of connecting rods 110 is subjected to the honing process collectively, the grindstones 1 b of the honing head 1 are always in contact with the inner peripheral surfaces 112 of the upper and lower connecting rods 110 Therefore, the honing head 1 is always inserted into the inner periphery of the hole 11 a of the support plate 11 of the first cassette 10 disposed between the upper and lower connecting rods 110. As a result, the gap S between the inner peripheral surface of the hole 11 a of the support plate 11 and the honing head 1 is substantially closed, so that the machining debris collected in the gap S is difficult to discharge.

  Therefore, as described above, the first coolant supply path A1 for supplying the coolant to the gap S and the first coolant for discharging the coolant from the gap S to the support plate 11 sandwiched between the connecting rods 110. By providing the discharge path B <b> 1 and the second coolant discharge path B <b> 2, the processing wastes accumulated in the gap S can be efficiently discharged.

  Further, in the present embodiment, by providing the recessed groove 11a1 on the inner peripheral surface of the hole 11a of the support plate 11, as shown in FIG. 8, the gap S is supplied via the first coolant supply passage A1. The coolant is discharged from the first coolant discharge path B1 and the second coolant discharge path B2 via a communication path constituted by a gap between the recessed groove 11a1 and the honing head 1. As a result, even when the gap S is very small, the coolant flow area can be secured, so that the coolant can be supplied and discharged smoothly.

  Furthermore, in the present embodiment, the gap 11c of the support plate 11 constituting the first coolant discharge path B1 and the second coolant discharge path B2 has a larger flow area than that (the lower surface of the lower surface of the guide plate 12). The communication between the groove 12a and the upper surface of the support plate 11) allows the coolant to be discharged more smoothly.

  For example, if the diameter of the entire inner peripheral surface of the hole 11a of the support plate 11 is increased, the gap S with the honing head 1 is increased, and the flow passage area can be increased. However, if the diameter of the hole 11 a of the support plate 11 is increased, the area of the end surface of the support plate 11 supporting the end surface of the small end portion 116 of the connecting rod 110 is reduced. Support may be unstable. In particular, when the small end portion 116 of the connecting rod 110 is thin, the area of the end face of the small end portion 116 is small, so when the diameter of the hole 11 a of the support plate 11 is increased, the small end of the connecting rod 110 by the end face of the support plate 11 The supporting area of the portion 116 is very small, and the support of the small end portion 116 is likely to be unstable.

  Therefore, as described above, by providing the recessed groove 11a1 in the vertical direction intermediate portion of the hole 11a of the support plate 11, the area of the end face of the support plate 11, specifically, the small end 116 of the upper connecting rod 110 Since the reduction in the area of the upper surface to support and the area of the lower surface to support the small end portion 116 of the lower connecting rod 110 is avoided, the connecting rod 110 can be stably supported.

  The present invention is not limited to the above embodiment. For example, when carrying out the honing process collectively to the internal peripheral surface 112 of three or more connecting rods 110, you may apply this invention. In this case, a coolant supply passage and a coolant discharge passage are provided in each of the support plates disposed between the adjacent connecting rods 110.

  Further, when the inner peripheral surface of the large end portion 114 of the plurality of connecting rods 110 is subjected to the honing process, the present invention may be applied. Furthermore, the component to which the honing apparatus of the present invention is applied is not limited to the connecting rod, and can be applied to any component that needs to finish the cylindrical inner peripheral surface with high accuracy.

DESCRIPTION OF SYMBOLS 1 Honing head 2 fixing jig 10 1st cassette 11 support plate 11a hole 11a1 recessed groove 11b flow path (coolant supply path)
11c Notch (coolant discharge path)
12 Guide plate 12a groove (coolant discharge path)
13 Limiting member 20 Second cassette 21 Support plate 22 Guide plate 23 Limiting member 30 Lid 110 Conical rod 112 Inner circumferential surface 114 Large end 116 Small end A1, A2, A3 Coolant supply path B1, B2, B3 Coolant discharge path S Clearance

Claims (2)

A honing processing apparatus for performing honing processing collectively on the inner peripheral surfaces of a plurality of parts in a state in which cylindrical inner peripheral surfaces of a plurality of parts are coaxially disposed,
And a support plate disposed between the plurality of parts,
The support plate includes a hole into which the honing head is inserted, a coolant supply path for supplying coolant to a gap between an inner peripheral surface of the hole and an outer peripheral surface of the honing head, and a coolant supplied to the gap Honing processing device having a coolant discharge path for discharging.   A recessed groove is provided on the inner peripheral surface of the hole of the support plate, and a gap between the recessed groove and the outer peripheral surface of the honing head constitutes a communication path connecting the coolant supply path and the coolant discharge path. The honing apparatus according to claim 1.

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