JP2008114346A - Finishing method and device of fine recessed part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a finishing method for realizing improvement of machining efficiency by reducing dispersion of depths of finally obtained fine recessed parts as much as possible when removing swollen parts generated around the fine recessed parts by grinding after forming many fine recessed parts on a surface to be machined of a workpiece. <P>SOLUTION: When the swollen parts B generated around the fine recessed parts A are removed by grinding after forming the many fine recessed parts A in the surface S1 to be machined to be a circumference surface in the workpiece W1, a honing grinding tool 1 to be a grinding tool is made a pressed state on the surface S1, and at least one of grinding resistance and pressing pressure is detected, while rotating the honing tool and removing the swollen parts B. By determining completion of the machining based on the detected value, dispersion of the depths of the fine recessed parts is reduced as much as possible to realize improvement of machining efficiency. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  In the present invention, after forming a large number of fine recesses that function as oil reservoirs on a work surface (sliding surface) of a work piece that becomes a sliding member, the swelled portion of the meat generated around the fine recesses is removed. The present invention relates to a finishing method and a finishing device for fine recesses used in the manufacturing.

  Conventionally, as processing of a fine recess, for example, a method of forming a fine recess on the outer peripheral surface of a cylindrical portion of a workpiece (Patent Document 1) or a method of forming a micro recess on an inner peripheral surface of a circular hole of a workpiece (Patent Document 2). In these processes, by using a processing roller having a convex part for forming a fine concave part on the outer periphery, and pressing the processing roller against the work surface of the work piece, the fine concave part is continuously formed on the work surface. To form.

  Since the processing of the fine recesses using such a processing roller is mechanical processing, the fine recesses can be formed with high accuracy and efficiency compared to the case of forming the fine recesses by shot blasting, for example, This is very effective in improving productivity and reducing manufacturing costs.

  Here, in the processing of the fine recesses as described above, a raised portion of the meat is generated around the fine recesses, and thus a finishing process is required to remove the raised portion by grinding such as honing. In order to obtain a surface that can be loaded with high friction and temperature and is supplied with lubricant during use of the workpiece, the surface of the workpiece is precisely machined by laser beam and honing. There was a method (patent document 3) to do.

In the above method, grooves arranged according to patterns intersecting each other are formed on the surface of the workpiece by scraping with a laser beam, and these grooves become fine concave portions functioning as a lubricant holding portion, that is, an oil reservoir on the surface of the workpiece. Thus, the surface of the workpiece is honed to a final dimension having a very shallow rough cutting depth and a high carrying function.
JP 2004-223570 A JP 2005-319476 A Japanese Patent No. 3101467

  However, it is possible to remove the swelled portion caused by the laser beam scraping in the finishing process of the conventional fine recesses as described above, but since the management of the honing process is not fully taken into consideration, In some cases, the depth of the fine recesses obtained may vary. For this reason, in the finishing process of the conventional fine recessed part, the variation in the depth of a fine recessed part was prevented, and the further improvement of processing efficiency was requested | required.

  The present invention has been made in view of the above-described conventional situation, and after forming a large number of fine recesses on the surface to be processed of the workpiece, the swelled portion generated around the fine recesses is ground by grinding. To provide a finishing method and a finishing device for a fine recess capable of minimizing the variation in the depth of the fine recess finally obtained upon removal and improving processing efficiency. It is aimed.

  The fine recess finishing method of the present invention uses a circumferential surface which is an outer peripheral surface of a cylindrical portion or an inner peripheral surface of a circular hole in a workpiece as a workpiece surface, and a number of minute recesses are formed on the workpiece surface. Thereafter, the swelled portion formed around the fine recess is removed by grinding.

  In this case, the finishing method according to the first aspect of the present invention is that the grinding tool is pressed against the work surface, and at least one of the work piece and the grinding tool is rotated to remove the raised portion, It is characterized in that at least one of grinding resistance and pressing pressure is detected, and the completion of processing is judged based on a detected value of at least one of grinding resistance and pressing pressure.

  That is, when removing the bulging part, the grinding tool is in contact only with the bulging part, so the frictional resistance is relatively small and the grinding resistance and pressing pressure of the grinding tool are small, but the bulging part is removed. When this is done, the frictional resistance increases when almost the entire surface of the grinding tool comes into contact with the work surface, and the grinding resistance and pressing pressure of the grinding tool also increase. Therefore, if the value when the grinding resistance or pressing pressure increases is set in advance as a threshold value, it is determined that the machining is completed when the detected value of at least one of the grinding resistance and pressing pressure exceeds the threshold value. obtain.

  According to a second aspect of the present invention, there is provided a fine recess finishing method according to claim 2, wherein the grinding tool is pressed against the work surface, the work piece is rotated to remove the raised portion, and the work piece is rotated. It is characterized by detecting the resistance and determining the completion of processing based on the detected value of the rotational resistance of the workpiece.

  The fine recess finishing apparatus of the present invention uses a circumferential surface that is an outer peripheral surface of a cylindrical portion or an inner peripheral surface of a circular hole in a workpiece, and a plurality of fine recesses are formed on the processed surface. Then, it is an apparatus which removes the swelled portion of the meat generated around the fine recesses by grinding.

  According to a third aspect of the present invention, there is provided the finishing device according to claim 3, wherein the grinding tool is rotationally driven, the tool pressing means for pressing the grinding tool against the surface to be processed, the grinding resistance of the grinding tool, and the pressing pressure of the grinding tool by the tool pressing means. A load detection means for detecting at least one of the above and a machining status determination means for judging the completion of machining based on the detected value of at least one of the grinding resistance and the pressing pressure detected by the load detection means. In the situation determination means, for example, it is determined that the machining is completed when the detected value exceeds a preset threshold value.

  According to a fourth aspect of the present invention, there is provided a finishing device for a fine recess according to a fourth aspect of the present invention, a grinding tool, a tool pressing means for pressing the grinding tool against the surface to be processed, and an axis of the surface to be processed that is a circumferential surface A workpiece rotation driving unit that rotates around, a load detection unit that detects a rotation resistance of the workpiece by the workpiece rotation driving unit, and a machining that determines completion of machining based on a detected value of the rotation resistance detected by the load detection unit It is characterized by having a situation determination means.

  According to the fine recess finishing method of the present invention, after forming a large number of fine recesses on the work surface of the workpiece, a grinding tool is used to remove the swelled portion around the fine recesses by grinding. By detecting at least one of the grinding resistance, pressing pressure and rotational resistance of the workpiece and controlling based on the detected value, the machining can be terminated when the swelled portion is removed, It is possible to shorten the time, improve the processing efficiency and reduce the processing cost, and it is possible to reliably remove only the swelled portion, thus providing a work piece that minimizes the variation in the depth of the fine recess. can do.

  According to the fine recess finishing apparatus of the present invention, after forming a large number of fine recesses on the work surface of the workpiece, a grinding tool is used to remove the swelled portions around the fine recesses by grinding. Since at least one of the grinding resistance, pressing pressure and rotational resistance of the workpiece is detected and controlled based on the detected value, the machining can be terminated at the time when the rising portion is removed. Since only the ascending portion can be surely removed, the variation in the depth of the fine recess can be minimized, and the processing time can be shortened, the processing efficiency can be improved, and the processing cost can be reduced.

  FIG. 1 is a view for explaining an embodiment of a fine recess finishing apparatus of the present invention. In the illustrated finishing apparatus, the inner peripheral surface (circumferential surface) of the circular hole of the workpiece W1 is used as the processing surface S1, and a large number of fine recesses are formed on the processing surface S1. In this embodiment, a honing tool T1 that is rotationally driven is provided as a grinding tool.

  The workpiece W1 is, for example, a cylinder block for an engine of an automobile, and a large number of fine recesses that function as an oil reservoir are formed on the inner peripheral surface of a cylinder bore that is a circular hole in order to reduce friction.

  For forming the fine recesses, for example, a fine recess processing apparatus described in the specification of Japanese Patent Application No. 2004-138179 (Japanese Patent Laid-Open No. 2005-319476) filed earlier by the present applicant can be used. This apparatus includes a processing roller having a convex part for forming a fine concave part on the outer peripheral part, presses the processing roller against the inner peripheral surface of the circular hole, rolls it around the axis of the circular hole, and follows the axis of the circular hole. Thus, the fine recesses are formed continuously and efficiently.

  The illustrated honing tool T1 includes a plurality of honing grindstones 1 arranged on a circumference, a grindstone shoe 2 in which these honing grindstones 1 are fixed to an outer peripheral surface, and a spindle 4 in which a hydraulic cylinder 3 is coaxially connected to a lower end portion. It has. The grindstone shoe 2 is a combination of a plurality of radially divided blocks in a substantially cylindrical shape, and is urged in the central direction by a ring spring (not shown), and has an upward tapered surface 5 in two upper and lower stages. Have.

  Further, a tapered shaft 7 integrated with the cylinder rod 6 of the hydraulic cylinder 3 is inserted in the grindstone shoe 2. The tapered shaft 7 has downward tapered surfaces 8 which are in contact with the respective tapered surfaces 5 of the grindstone shoe 2 in two upper and lower stages. Thus, when the hydraulic cylinder 3 is driven to extend, the grinding wheel shoe 2 is expanded as the taper shaft 7 is lowered, and the honing grindstone 1 is pressed against the surface S1. When the hydraulic cylinder 3 is driven to contract, the taper shaft 7 is raised, the grindstone shoe 2 returns to the central direction by the action of the above-described ring spring.

  In other words, in this embodiment, the tool pressing means is configured to move each honing grindstone 1 in the radial direction and press it against the workpiece surface S1 by the hydraulic cylinder 3, the taper shaft 7, the grindstone shoe 2, and the like.

  The finishing device includes a slider 10 that can be moved up and down on a base 9 disposed on the upper side, and a rotary motor 11 on the slider 10, and the upper end of the spindle 4 is connected to the rotary motor 11. It is. That is, in this embodiment, the slider 10 constitutes an axis feeding means for moving the honing tool (grinding tool) T1 in the axial direction of the work surface S1, which is a circumferential surface, and the rotary motor 11 is used as the honing tool. The rotational drive means is comprised.

  Further, the finishing apparatus includes a load detecting means 12 for detecting at least one of a grinding resistance of the honing tool (grinding tool) T1 and a pressing pressure against the work surface S1, and a grinding resistance and a pressing pressure detected by the load detecting means 12. Is provided with machining status determination means 13 for determining the completion of machining based on at least one of the output values.

  The machining status determination means 13 includes a database 13a for accumulating data relating to the grinding resistance and pressing pressure of the honing tool (grinding tool) T1, and a calculation unit 13b for performing calculations based on the data in the database 13a and the detection value by the load detection means 12. And the determination part 13c which determines completion of a process based on the calculation result of the calculating part 13b is provided.

  In this embodiment, the power signal of the rotary motor 11 is monitored as the grinding resistance of the honing tool T1. As a pressing pressure of the grinding tool, for example, a load generated by the hydraulic cylinder 3 can be monitored.

  Here, when the workpiece W1 is a cylinder block and the circular hole is a cylinder bore, at least the material of the workpiece surface S1 is mainly cast iron, but in addition, aluminum alloy, steel, sprayed surface and plated surface It may be. The honing grindstone 1 is more preferably one using diamond abrasive grains having an average grain diameter of 20 μm or less, for example, so that the swelled portion of the meat can be completely removed and the processed surface S1 is not removed so much. The abrasive grains are not particularly limited, and may be super abrasive grains other than diamond, or general abrasive grains such as GC. Moreover, if the processing efficiency is low, for example, an elastic bond grindstone using abrasive grains having an average particle diameter of 20 μm or more may be used.

  In order to remove the swelled portion of the meat generated around the fine recess using the finishing device having the above-described configuration, the honing tool T1 is lowered into the circular hole of the workpiece W1, and the rotary motor 11 is used. The honing tool T1 is rotated, and the honing tool T1 is moved up and down by the slider 10.

  Thereafter, the hydraulic cylinder 3 is driven to extend and the honing grindstone 1 is pressed against the work surface S1, thereby removing the rising portion by the honing grindstone 1. In the initial stage of processing, as shown in FIG. 2 (a), the honing grindstone 1 and the tip of the bulging portion B generated around the fine recess A are in contact with each other. As shown in FIG. 2B, the swelled portion is completely removed, and the honing grindstone 1 comes into contact with almost the entire surface S1.

  During this time, the honing grindstone 1 is pressed against the work surface S1 by the hydraulic cylinder 3 at a constant pressure. Therefore, in the state of the initial stage of machining shown in FIG. 2A, the contact between the honing grindstone 1 and the tip of the raised portion B causes a high processing surface pressure per unit area of the contact portion, and the raised portion B Can be processed intensively. Then, as shown in FIG. 2 (b), when the swelled portion is completely removed and almost the entire surface of the honing grindstone 1 comes into contact with the workpiece surface S1, the machining surface pressure per unit area of the contact portion becomes extremely small. The machining efficiency of the work surface S1 is extremely reduced, and the work surface S1 is hardly machined even if the machining time is increased.

  During the above machining, the finish machining apparatus constantly monitors the power signal of the rotating motor 11 being machined by the load detection unit 12 and inputs the change in the power signal to the machining status determination unit 13.

  FIG. 3 is a graph showing a change in the power value of the rotary motor 11 with respect to the machining time. When the honing tool T1 is idling, the honing grindstone 1 is not in contact with the raised portion B. As shown in b, there is no change in the power value. When the honing grindstone 1 comes into contact with the raised portion B, the power value increases. When the raised portion B is gradually removed, the power value increases as shown by bc.

  Then, when the swelled portion is completely removed and the honing grindstone 1 comes into contact with almost the entire surface of the work surface S1, the grinding resistance and frictional resistance acting between the surface of the honing grindstone 1 and the work surface S1 are rapidly increased. As a result, the power value of the rotary motor 11 increases remarkably as shown by cd, and thereafter, the machining of the work surface S1 is hardly performed, so that the power value becomes as shown by de. The value is almost constant.

  Therefore, the machining status determination means 13 calculates the change of the power value from the inclination between bc to the inclination between cd and completes the processing when the inclination changes, or an arbitrary value after c. The power value is set as a threshold value in advance, and the machining is completed when the detected value exceeds the threshold value. Thereby, a swell part can be removed completely and it can finish in the state by which the to-be-processed surface S1 is hardly processed.

  At this time, the machining status determination means 13 can determine completion of machining at high speed and high accuracy by adopting a configuration including the database 13a, the calculation unit 13b, and the determination unit 13c.

  Thus, in the finishing method and the finishing device, the processing time can be minimized, the processing efficiency can be improved, and the processing cost can be reduced. In addition, since the portions other than the raised portion B are hardly processed, it is possible to finally obtain the processing surface S1 having fine concave portions with high accuracy and uniform depth distribution.

  Note that the fact that the change in the slope of the power value can be detected as described above means that it is possible to determine that only the climax portion B has been removed, and that the bulge portion B can be obtained by intentionally continuing the processing. Subsequent to the removal, a certain amount of honing processing can be performed on the processing surface S1.

  FIG. 4 is a diagram for explaining another embodiment of the fine recess finishing apparatus of the present invention. Note that the same components as those in the previous embodiment are denoted by the same reference numerals and detailed description thereof is omitted.

  In the previous embodiment, the illustrated finishing apparatus is configured to press the honing grindstone (1) against the work surface (S1) by driving the grindstone shoe (2) by the hydraulic cylinder (3). The main shaft 4 has a double structure in which a taper shaft 7 sufficiently longer than that of the previous embodiment is slidably inserted therein, and the taper shaft 7 is axially connected by a cutting control motor 15. By reciprocating along the direction, the grindstone shoe 2 is moved in the radial direction to press the honing grindstone 1 against the work surface S1.

  In this embodiment, the load detection means 12 constantly monitors the power signal of the cutting control motor 15 as the pressing pressure of the honing tool T1 against the workpiece surface S1, and the detected value is sent to the machining status judgment means 13. You are typing.

  FIG. 5 is a graph showing a change in the power value of the cutting control motor 11 with respect to the machining time. When the honing tool T1 is idling, the honing grindstone 1 is not in contact with the raised portion B. As shown in ab, there is no change in the power value. When the honing grindstone 1 comes into contact with the raised portion B, the power value increases. When the raised portion B is gradually removed, the power value increases as shown by bc.

  When the swelled portion is completely removed and the honing grindstone 1 comes into contact with almost the entire work surface S1, the honing grindstone 1 having a low working efficiency with respect to the work surface S1 is used. However, the load for cutting into the work surface S1 increases rapidly, and as a result, the power value of the cutting control motor 15 increases extremely, as shown in FIG.

  Therefore, the machining status determination means 13 calculates a change from the inclination between bc of the power value to the inclination after c, and completes the processing when the inclination changes, or any power value after c. Is set in advance as a threshold value, and the processing is completed when the detected value exceeds the threshold value. Thereby, a swell part can be removed completely and it can finish in the state by which the to-be-processed surface S1 is hardly processed.

  Thus, in the finishing method and the finishing device, as in the previous embodiment, the processing time can be minimized, the processing efficiency can be improved, and the processing cost can be reduced. In addition, since the portions other than the raised portion B are hardly processed, it is possible to finally obtain the processing surface S1 having fine concave portions with high accuracy and uniform depth distribution.

  FIG. 6 is a view for explaining still another embodiment of the fine recess finishing apparatus of the present invention. The illustrated finishing processing apparatus uses the outer peripheral surface (circumferential surface) of the cylindrical portion of the workpiece W2 as the processing surface S2, and after forming a large number of microscopic recesses on the processing surface S2, it is generated around the microscopic recesses. The raised part of the meat is removed by grinding.

  The workpiece W2 is, for example, a camshaft for an automobile engine, and a large number of fine recesses functioning as an oil sump are formed on the outer peripheral surface of a journal portion which is a cylindrical portion in order to reduce friction. The swelled portion of the meat generated around the fine recess is removed.

  The finishing device shown in FIG. 6A includes a headstock 21 provided with a chucking device 20 that holds one end portion of the workpiece W2, and a center 22 that holds the other end portion of the workpiece W2. A tailstock 23 is provided, and the workpiece W2 is held horizontally by the spindle stock 21 and the tailstock 23, and a spindle motor 24 built in the spindle stock 21 rotates the workpiece W2 about its axis. This corresponds to the work rotation driving means.

  Further, the finishing apparatus of this embodiment includes a grindstone T2 fixed to the tip of the cylinder rod 26 of the air cylinder 25 as a grinding tool. The workpiece is processed by the air cylinder 25 as shown in FIG. The grindstone T2 is pressed against the work surface S1 of W2 with a predetermined pressure.

  Further, the finishing apparatus includes an axis feeding means 27 for moving the grindstone (grinding tool) T2 in the axial direction of the work surface S2 which is a circumferential surface. The axis feeding means 27 of this embodiment is an air cylinder. 25, the grindstone T2 is reciprocated.

  The finishing device described above detects the rotational resistance of the workpiece W2 as the grinding resistance of the grinding tool. Specifically, the load detection means 12 constantly monitors the power signal of the spindle motor 24, As in each of the embodiments, the machining status judging means 13 judges the completion of machining based on the power signal of the spindle motor 24.

  In the case of the above embodiment, the load applied by the air cylinder 25 is detected as the pressing force of the grindstone (grinding tool) T2 against the workpiece surface S2, and the machining status judging means 13 judges the machining completion based on this detected value. It is also possible.

  For this reason, the machining status determination means 13 is based on the database 13a for accumulating data relating to the grinding resistance, pressing pressure and rotation resistance of the workpiece W2 of the grinding tool, the data in the database 13a and the detection value by the load detection means 12. A calculation unit 13b that performs calculation and a determination unit 13c that determines completion of machining based on the calculation result of the calculation unit 13b are provided.

  FIG. 7 is a view for explaining still another embodiment of the fine recess finishing apparatus of the present invention. The illustrated finishing processing apparatus uses the outer peripheral surface (circumferential surface) of the cylindrical portion of the workpiece W2 as the processing surface S2, and after forming a large number of microscopic recesses on the processing surface S2, it is generated around the microscopic recesses. The raised part of the meat is removed by grinding.

  The finishing apparatus shown in FIG. 7A includes a headstock 21 provided with a chucking device 20 that holds one end of the workpiece W2, and a center 22 that holds the other end of the workpiece W2. A tailstock 23 is provided, and the workpiece W2 is held horizontally by the spindle stock 21 and the tailstock 23, and a spindle motor 24 built in the spindle stock 21 rotates the workpiece W2 about its axis. This corresponds to the work rotation driving means.

  In addition, as shown in FIGS. 7B and 7C, the finishing apparatus of this embodiment presses the wrapping film T3 as a grinding tool and the wrapping film T3 against the work surface S2 of the work W2. A polishing shoe 31 is provided.

  The polish shoe 31 includes a pair of blocks 31A and 31B that sandwich the workpiece W2 from above and below, and is driven so as to approach and separate from each other by a driving source such as a cylinder or a motor (not shown), and the inner side of both blocks 31A and 31B. The wrapping film T3 is pressed against the work surface S2 via an elastic body 32 (shown in FIG. 7b) such as urethane rubber or a stone insert (shown in FIG. 7c) 33 attached thereto.

  Further, the finishing processing apparatus includes an axis feeding means for moving the wrapping film T3 along with the polish shoe 31 in the axial direction of the processing surface S2, and the wrapping film T3 by pulling the wrapping film T3 in the radial direction of the workpiece W2. Circumferential feed means for moving along the circumferential surface of the machining surface S2 is provided.

  As described above, the wrapping film T3 is moved along the axial direction or the circumferential surface of the processing surface S2 by the shaft feeding means or the circumferential feeding means, so that the processing surface S2 always uses a new portion of the wrapping film T3. Can be processed and clogging of the wrapping film T3 can be prevented, and polishing can be performed in a stable state at all times.

  The finishing device described above detects the rotational resistance of the workpiece W2 as the grinding resistance of the grinding tool. Specifically, the load detection means 12 constantly monitors the power signal of the spindle motor 24, As in each of the embodiments, the machining status judging means 13 judges the completion of machining based on the power signal of the spindle motor 24. As a result, the same effects as in the previous embodiments can be obtained.

  According to the finishing method and the finishing apparatus for fine recesses described in the above embodiments, after forming the fine recesses on the processed surfaces S1 and S2 of the workpieces W1 and W2, the fine recesses are generated around the fine recesses. When removing the swelled portion of the meat by grinding, at least one of the grinding resistance pressing pressure and the rotational resistance is directly detected according to the form of the work surface, that is, the outer peripheral surface or the inner peripheral surface, or the motor When at least one of grinding resistance, pressing pressure and rotational resistance is indirectly detected from the power signal of the actuator, etc., and the completion of machining is judged based on the detected value, and machining is performed when the climax part is removed. Can reduce the processing time, improve the processing efficiency, reduce the processing cost, and reduce the variation in the depth of the fine recesses finally obtained as much as possible. Things can be provided.

  Further, the finishing method and the finishing device of each of the above embodiments are provided with an axis feeding means for relatively moving at least one of the workpiece and the grinding tool in the axial direction of the workpiece surface which is a circumferential surface. Therefore, it is possible to finish the work surface such as the outer peripheral surface of the cylindrical part that is long in the axial direction and the inner peripheral surface of the circular hole that is long in the axial direction, and the movement in the axial direction always prevents clogging of the grindstone. Grinding can be performed in a stable state.

  The fine recess finishing apparatus of the present invention is not limited to the above-described embodiments in detail, and is configured according to the type of workpiece, the type of grinding tool, the drive mechanism, and the like. Details can be changed as appropriate.

  In each of the above embodiments, the cylinder block and the camshaft are exemplified as the work piece. However, the cylinder of the compressor having the inner peripheral surface of the cylinder bore as the work surface, the slide bearing and the journal having the slide surface as the work surface. A crankshaft with the outer peripheral surface of the pin and cam lobe as the work surface, a balance shaft with the slide surface as the work surface, and a piston and slide surface with the outer peripheral surface as the work surface as the work surface. The present invention can be applied to various sliding members such as a piston pin, and can provide a sliding member that has a highly accurate fine recess on the surface to be processed, thereby exhibiting excellent low friction performance.

It is sectional drawing explaining one Example of the finishing processing apparatus of the fine recessed part of this invention. It is sectional drawing (a) which shows the process initial state of the grinding process of a swell part, and sectional drawing (b) which shows the state which removed the swell part subsequently. 2 is a graph showing a change in a power value of a rotary motor with respect to processing time in grinding by the finishing apparatus shown in FIG. 1. It is sectional drawing explaining the other Example of the finishing processing apparatus of the fine recessed part of this invention. 5 is a graph showing a change in power value of a cutting control motor with respect to processing time in grinding by the finishing apparatus shown in FIG. It is the side view (a) explaining the other Example of the finishing processing apparatus of the fine recessed part of this invention, and sectional drawing (b) based on an II line. They are a side view (a) explaining the further another Example of the finishing processing apparatus of the fine recessed part of this invention, and sectional drawing (b) (c) based on the II-II line, respectively.

Explanation of symbols

A Fine concave part B Swelling part S1 S2 Work surface T1 Honing tool (grinding tool)
T2 grinding wheel (grinding tool)
T3 Wrapping film (grinding tool)
W1 W2 Workpiece 1 Honing whetstone 2 Whetstone shoe 3 Hydraulic cylinder (tool pressing means)
7 Taper shaft (tool pressing means)
10 Slider (shaft feed means)
DESCRIPTION OF SYMBOLS 12 Load detection means 13 Machining condition determination means 13a Database 13b Operation part 13c Determination part 15 Cutting control motor (tool pressing means)
24 Spindle motor (work rotation drive means)
25 Air cylinder (tool pressing means)
27 Shaft feed means 31 Polish shoe (tool pressing means)

Claims (18)

The circumferential surface, which is the outer peripheral surface of the cylindrical portion of the workpiece or the inner peripheral surface of the circular hole, is used as the processing surface. When removing the part by grinding, press the grinding tool against the work surface, rotate at least one of the workpiece and the grinding tool to remove the swelled part, and remove the grinding resistance and pressure of the grinding tool. A method for finishing a minute recess, wherein at least one of the two is detected and the completion of processing is determined based on a detected value of at least one of grinding resistance and pressing pressure. The circumferential surface, which is the outer peripheral surface of the cylindrical portion of the workpiece or the inner peripheral surface of the circular hole, is used as the processing surface. When removing the part by grinding, press the grinding tool against the work surface, rotate the work piece to remove the raised part, detect the rotational resistance of the work piece, A finishing method for fine recesses, characterized in that processing completion is determined based on a detected value of rotational resistance. The circumferential surface, which is the outer peripheral surface of the cylindrical portion of the workpiece or the inner peripheral surface of the circular hole, is used as the processing surface. An apparatus for removing a portion by grinding, a grinding tool that is driven to rotate, a tool pressing means that presses the grinding tool against a surface to be processed, and a grinding resistance of the grinding tool and a pressing pressure of the grinding tool by the tool pressing means A load detecting means for detecting at least one, and a machining condition judging means for judging the completion of machining based on a detected value of at least one of grinding resistance and pressing pressure detected by the load detecting means. Finishing device. The circumferential surface, which is the outer peripheral surface of the cylindrical portion of the workpiece or the inner peripheral surface of the circular hole, is used as the processing surface. An apparatus for removing a portion by grinding, a workpiece for rotating a grinding tool, a tool pressing means for pressing the grinding tool against a surface to be processed, and a workpiece to be rotated around an axis of the surface to be processed which is a circumferential surface Rotation drive means, load detection means for detecting rotation resistance of the workpiece by the workpiece rotation drive means, and machining status determination means for determining completion of machining based on the detected value of rotation resistance detected by the load detection means A finishing device for fine recesses, characterized in that. 5. The finishing of a fine recess according to claim 3, further comprising an axial feed means for moving at least one of the workpiece and the grinding tool relative to the axial direction of the workpiece surface which is a circumferential surface. Processing equipment. The grinding tool is a honing tool that is rotationally driven with the inner peripheral surface of the circular hole of the work piece as the work surface, and moves the honing grindstones arranged on the circumference and each honing grindstone in the radial direction. A tool pressing means that presses against the work surface, and the load detection means is means for detecting at least one of a rotational resistance that is a grinding resistance of the honing tool and a pressing pressure by the tool pressing means. The fine recess finishing apparatus according to claim 3 or 5. 6. The fine recess finishing apparatus according to claim 4 or 5, wherein the grinding tool is a grindstone whose work surface is the outer peripheral surface of the cylindrical portion of the workpiece. 6. The fine recess finishing apparatus according to claim 4 or 5, wherein the grinding tool is a lapping film having an outer peripheral surface of a cylindrical portion of a workpiece as a workpiece surface. The processing status determination means performs a calculation based on a database that accumulates data related to at least one of grinding resistance of the grinding tool, pressing pressure, and rotation resistance of the workpiece, and data detected in the database and a load detection means. The fine recess finishing apparatus according to any one of claims 3 to 8, further comprising: a calculation unit that performs a determination unit that determines completion of processing based on a calculation result of the calculation unit. 3. A sliding member, wherein a processed surface is finished by the fine recess finishing method according to claim 1 or 2. A cylinder block for an engine, wherein the inner peripheral surface of the cylinder bore is finished by the method for finishing a fine recess according to claim 1. A compressor cylinder, wherein the inner peripheral surface of the cylinder bore is finished by the method for finishing a fine recess according to claim 1. A sliding bearing, wherein the sliding surface is finished by the finishing method for fine recesses according to claim 1 or 2. A camshaft, wherein the outer peripheral surfaces of the journal and the pin are finished by the finishing method for fine recesses according to claim 2. A crankshaft in which the outer peripheral surfaces of the journal and the cam lobe are finished by the finishing method for fine recesses according to claim 2. A balance shaft, wherein the sliding surface is finished by the finishing method for fine recesses according to claim 2. A piston, wherein the sliding surface is finished by the finishing method for fine recesses according to claim 2. 3. A piston pin, wherein the sliding surface is finished by the finishing method for fine recesses according to claim 2.

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