JP4427750B2 - Fine recess processing apparatus and fine recess processing method - Google Patents

Description

The present invention provides, for example, a fine recess processing apparatus used to form a fine recess (oil sump) for realizing low friction on the inner peripheral surface of a cylinder bore (circular hole) in a cylinder block of an automobile engine. And a fine recess processing method .

  Conventionally, shot blasting is often used when forming a fine recess in the inner peripheral surface of the cylinder bore of the cylinder block as described above. In this shot blasting, a masking sheet having a predetermined shape of holes is affixed to the inner peripheral surface of the cylinder bore, and then small diameter particles such as ceramics are projected onto the inner peripheral surface of the cylinder bore together with compressed air, thereby A recess is formed in a portion exposed through the through hole of the surface.

Then, after the recess is formed, the masking sheet is removed and washed, and then honing is performed again to remove the swelled portion generated around the recess in the shot blasting process.
JP 2002-307310 A

  However, in the formation of fine recesses using shot blasting as described above, it is difficult to regularly arrange the fine recesses, and in addition, the masking sheet is attached to the inner peripheral surface of the circular hole. The process, the removal process, and the cleaning process are indispensable, and there is a problem that the processing cost is increased by the amount of such work, and it has been a conventional problem to solve these problems .

The present invention has been made paying attention to the above-described conventional problems, and of course, it is possible to form fine recesses with good accuracy with respect to the inner peripheral surface of the circular hole. At the same time, it is possible to obtain shape data such as the inner diameter, roundness, and cylindricity of the circular hole, as well as the depth of the fine recess, and as a result, the quality can be confirmed without requiring a special inspection process. In addition, an object of the present invention is to provide a fine recess processing apparatus and a fine recess processing method that can contribute to a reduction in processing cost as much as a special inspection process can be omitted.

A fine recess processing apparatus according to the present invention is a fine recess processing apparatus that forms a fine recess on an inner peripheral surface of a circular hole. A main shaft, a holder that is coaxially mounted on the main shaft and rotates integrally, and a fine outer peripheral portion. A processing roller having irregularities, a roller support provided on the holder for supporting the processing roller rotatably around a roller axis parallel to the main shaft, and a radial load of the processing roller with respect to the roller support And a load generating means for pressing fine irregularities of the processing roller onto the inner peripheral surface of the circular hole whose central axis is matched with the rotation axis of the holder, and the shape of the inner peripheral surface of the circular hole provided in the holder A data acquisition means for obtaining data, wherein the data acquisition means obtains shape data without contacting the inner peripheral surface of the circular hole, and a radial displacement of the processing roller. Round based on It is characterized by comprising both the inner circumferential surface roller displacement measuring means for obtaining shape data of the.
In the microrecess processing apparatus of the present invention, since the microrecesses are formed, shape data such as the depth of the microrecesses in addition to the inner diameter, roundness, and cylindricity of the circular hole can be obtained. The quality can be confirmed without the need for.

The fine recess processing method according to the present invention includes a pre-processing process for adjusting the inner peripheral surface of the circular hole and a fine recess processing performed using the above-described fine recess processing apparatus, so that the fine recess is formed on the inner peripheral surface of the circular hole. When forming the fine recesses on the inner peripheral surface of the circular hole in the fine recess processing step, the shape data is obtained without contacting the inner peripheral surface of the circular hole, and the diameter of the processing roller is obtained. The shape data of the inner peripheral surface of the circular hole is acquired based on the displacement in the direction, and the shape data of the inner peripheral surface of the circular hole obtained by this data acquisition means is fed back to the pre-processing step and the pre-processing condition It is characterized by making adjustments.
According to the fine recess processing method of the present invention, the shape data of the inner peripheral surface of the circular hole obtained by the data acquisition means during the formation of the fine recess is fed back to the preprocessing process and Since the adjustment is performed, the precision of the fine recesses can be improved, and in addition, the finishing process after forming the fine recesses can be performed almost uniformly over the entire inner surface of the circular hole. Therefore, it is possible to form a fine recess having a highly accurate depth.

According to the present invention, it is needless to say that fine concave portions can be formed with good accuracy with respect to the inner peripheral surface of the circular hole. It is possible to obtain shape data such as the depth of the fine recesses in addition to the degree, so that the quality can be confirmed without requiring a special inspection process, and in addition, no special inspection process is required. As a result, it is possible to achieve a very excellent effect that it is possible to reduce the processing cost.
Further, the data acquisition means is a non-contact type data acquisition means for obtaining shape data without contacting the inner peripheral surface of the circular hole, and the inner peripheral surface of the circular hole based on the radial displacement of the processing roller. Since it has both the roller displacement measuring means for obtaining the shape data, the depth Z ′ of the fine recess obtained by the non-contact type data obtaining means from the depth Z of the fine recess obtained by the roller displacement measuring means. It is possible to obtain the processing depth h of the fine concave portion with high accuracy. That is, the processing depth h of the high-precision fine recess can be obtained from h = Z−Z ′.
Further, the load sensor has a pressing mechanism for bringing the processing roller into contact with the inner peripheral surface of the circular hole and continuing the operation until the load detected by the load sensor reaches a preset value. If the operation of the pressing mechanism is continued until the detected load reaches the set value, the inner peripheral surface of the cylinder bore can be pressurized with a predetermined load.

  In the fine recess processing apparatus of the present invention, the data acquisition means can be configured as a non-contact type data acquisition means for obtaining shape data without contacting the inner peripheral surface of the circular hole. Therefore, shape data can be obtained without scratching the inner peripheral surface of the circular hole.

  Further, in the fine recess processing apparatus of the present invention, it is possible to adopt a configuration in which the roller displacement measuring means for obtaining the shape data of the inner peripheral surface of the circular hole based on the radial displacement of the processing roller is a data acquisition means, If this configuration is adopted, the processing roller can be used as a substitute for the measuring element, so that highly accurate shape data can be obtained without being affected by dirt on the inner peripheral surface of the circular hole.

  Furthermore, in the fine recess processing apparatus of the present invention, as the data acquisition means, non-contact type data acquisition means for obtaining shape data without contacting the inner peripheral surface of the circular hole, and radial displacement of the processing roller Based on this, it is possible to adopt a configuration including both of the roller displacement measuring means for obtaining the shape data of the inner peripheral surface of the circular hole, and in this case, the inner diameter, roundness, cylindricity, etc. of the circular hole, etc. In addition to obtaining the shape data, the fine recesses can be observed, so that the depth of the fine recesses during processing can be measured with high accuracy.

  Furthermore, in the fine recess processing apparatus of the present invention, the holder can be provided with a covering portion, and a roller displacement measuring means can be disposed on the covering portion. In this case, the influence of cutting fluid or the like can be obtained. Without receiving it, it becomes possible to obtain highly accurate shape data.

  On the other hand, in the fine concave portion processing method using the fine concave portion processing apparatus of the present invention, the fine concave portion processing using the fine concave portion processing apparatus provided with the non-contact type data acquisition means or the roller displacement measuring means, and the fine concave portion After finishing the inner peripheral surface of the circular hole formed with a fine recess on the inner peripheral surface of the circular hole, a fine recess is formed on the inner peripheral surface of the circular hole in the step of processing the fine recess. During this process, the data acquisition means acquires the shape data of the inner peripheral surface of the circular hole, and performs post-processing based on the shape data of the inner peripheral surface of the circular hole obtained by the data acquisition means. By adopting this configuration, the finishing process, which is a post-processing process, can be performed based on the shape data of the inner peripheral surface of the circular hole in which the fine recesses are formed. Almost over And thus capable of forming a fine concave one groove depth.

  Moreover, in the fine recessed part processing method using the fine recessed part processing apparatus of this invention, it carries out using the fine recessed part processing apparatus which comprises both a non-contact-type data acquisition means and a roller displacement measuring means as a data acquisition means. When forming the fine recesses in the inner peripheral surface of the circular hole through the fine recess processing and the post-processing processing to finish the inner peripheral surface of the circular hole in which the fine recesses are formed, While forming the fine recesses on the peripheral surface, the data acquisition means acquires the shape data of the inner peripheral surface of the circular hole, and then based on the shape data of the inner peripheral surface of the circular hole obtained by this data acquisition means By adopting this configuration, finishing processing, which is post-processing processing, can be adjusted in order to make the processing depth of the fine recesses uniform. Inner circumference And thus capable of forming a fine recess substantially uniform depth over the entire surface of the.

  Here, when forming the fine recesses on the inner peripheral surface of the circular hole through the fine recess processing and the post-processing processing to finish the inner peripheral surface of the circular hole in which the fine recesses are formed, before performing the fine recess processing Further, it may be configured to perform a pretreatment process for adjusting the inner peripheral surface of the circular hole.

  Then, a work having fine concave portions processed by using the fine concave portion processing apparatus described above on the inner peripheral surface as the sliding surface of the circular hole, for example, as shown in FIG. The engine cylinder block SB on the surface Ba has a low friction on the inner peripheral surface Ba of the cylinder bore B on which the piston slides, and as a result, can contribute to an improvement in fuel consumption.

  EXAMPLES Hereinafter, although an Example demonstrates this invention still in detail, this invention is not limited to a following example.

  As shown in FIG. 2, this fine recess processing apparatus 1 is an NC machine tool that forms fine recesses on the inner peripheral surface of a cylinder bore that is a circular hole of a cylinder block of an automobile engine, and is movable in the vertical direction. A spindle 3 supported in a state of protruding downward from the spindle head 2, a workpiece mounting table 4 that is movable below the spindle head 2 in two orthogonal directions within a horizontal plane, and coaxial with the spindle 3 And a holder 10 that rotates integrally with the holder 10. The holder 10 is attached to and detached from the main shaft 3 by an automatic tool changer (not shown).

  As shown in FIG. 1, the holder 10 includes a processing roller 11 having fine irregularities on the outer peripheral portion, a roller support portion 13 that rotatably supports the processing roller 11 via a roller shaft 12, and the roller The processing roller 11 is moved closer to and away from the housing 14 that holds the support portion 13 so as to be movable in a direction orthogonal to the main shaft 3, and the inner peripheral surface Ba of the cylinder bore B whose center axis is aligned with the rotation axis L of the holder 10. A pressing mechanism 20 is provided as a load generating means capable of pressing fine irregularities on the outer peripheral surface, and the housing 14 is a non-contact type that obtains shape data without contacting the inner peripheral surface Ba of the cylinder bore B. Displacement measuring device (data acquisition means) 15 is provided.

  The pressing mechanism 20 includes a compression coil spring 21 positioned between the roller support portion 13 and the housing 14 and a stepping motor (not shown) built in the upper end of the housing 14. As a result of this operation, the entire housing 14 is brought close to the inner peripheral surface Ba of the cylinder bore B (moved leftward in FIG. 1), and is perpendicular to the main shaft 3 with respect to the processing roller 11 by the compression coil spring 21. By applying a load in the direction, the outer peripheral portion of the processing roller 11 is pressed against the inner peripheral surface Ba of the cylinder bore B. A load sensor 16 such as a load cell is provided between the housing 14 and the compression coil spring 21.

  In the fine recess processing apparatus 1 described above, when forming the fine recess on the inner peripheral surface Ba of the cylinder bore B, first, the main shaft 3 and the central axis of the cylinder bore B are positioned so as to substantially coincide with each other. The holder 10 is lowered and the processing roller 11 is inserted into the cylinder bore B.

  Next, the pressing mechanism 20 is actuated until the processing roller 11 is brought into contact with the inner peripheral surface Ba of the cylinder bore B as shown in FIG. 1 until the load detected by the load sensor 16 reaches a preset value. The operation of the pressing mechanism 20 is continued.

  That is, after the processing roller 11 comes into contact with the inner peripheral surface Ba of the cylinder bore B, when the operation of the pressing mechanism 20 is continued, the compression coil spring 21 is compressed between the roller support portion 13 and the housing 14, and the repulsive force thereof. Is applied to the processing roller 11 as a load, and this load is detected by the load sensor 16, so if the operation of the pressing mechanism 20 is continued until the detected load of the load sensor 16 reaches a set value, the cylinder bore The inner peripheral surface Ba of B can be pressurized with a predetermined load.

  As described above, when the set value of the load is detected and subsequently the operation of the pressing mechanism 20 is stopped, when the holder 10 is rotated together with the main shaft 3, it is pressed against the inner peripheral surface Ba of the cylinder bore B. If the processing roller 11 is turned around the rotation axis L, and the main shaft 3 is lowered in this state, a fine recess is formed in a wide region of the inner peripheral surface Ba of the cylinder bore B.

  During this time, the non-contact type displacement measuring device 15 provided in the housing 14 turns around the rotation axis L in the same manner as the processing roller 11 and does not contact the inner peripheral surface Ba of the cylinder bore B, and the shape data. Get.

  Then, when the fine recess processing is completed, the pressing mechanism 20 is operated to separate the processing roller 11 from the inner peripheral surface Ba of the cylinder bore B, and then the holder 10 is raised together with the main shaft 3 whose rotation is stopped, The processing roller 11 is detached from the cylinder bore B.

  As described above, in the fine concave portion processing apparatus 1 according to this embodiment, the fine concave portion is transferred by the processing roller 11 and at the same time, in addition to the inner diameter, roundness, and cylindricity of the cylinder bore B by the displacement measuring device 15. Since the shape data such as the depth of the fine concave portion is obtained, the quality can be confirmed without requiring a special inspection process.

  Moreover, in the fine recessed part processing apparatus 1 by the above-mentioned Example, the non-contact-type displacement measuring device 15 which acquires shape data, without contacting with the internal peripheral surface Ba of the cylinder bore B is employ | adopted as a data acquisition means. Therefore, the shape data can be obtained without scratching the inner peripheral surface Ba of the cylinder bore B.

  In the embodiment described above, the pressing mechanism 20 includes a compression coil spring 21 positioned between the roller support portion 13 and the housing 14 and a stepping motor (not shown) built in the upper end of the housing 14. However, as another configuration, for example, a hydraulic actuator, a pneumatic actuator, or an electric actuator installed in the housing 14 may be used as the pressing mechanism. In this case, the roller support portion 13 is moved to the inner peripheral surface of the cylinder bore B by the operation of the actuator. The load sensor is disposed between the roller support portion 13 and the actuator so that the outer peripheral portion of the processing roller 11 is pressed against the inner peripheral surface Ba of the cylinder bore B by approaching Ba.

  FIG. 3 shows another embodiment of the fine recess processing apparatus of the present invention. As shown in FIG. 3, the micro recess processing apparatus 31 in this embodiment is the same as the micro recess processing apparatus 1 shown in FIG. The difference is a roller displacement measuring device (roller displacement measuring means) which is installed in the vicinity of the processing roller 11 of the housing 14 and obtains the shape data of the inner peripheral surface Ba of the cylinder bore B based on the radial displacement of the processing roller 11. 45 is the data acquisition means, and the other configuration is the same as that of the fine recess processing apparatus 1 shown in FIG.

  In the fine recess processing apparatus 31 in this embodiment, since the processing roller 11 can be used as a substitute for the measuring element, highly accurate shape data can be obtained without being affected by dirt on the inner peripheral surface Ba of the cylinder bore B. Is possible.

  FIG. 4 shows still another embodiment of the fine recess processing apparatus of the present invention. As shown in FIG. 4, the fine recess processing apparatus 51 in this embodiment is the micro recess processing apparatus 31 shown in FIG. The difference is that the roller displacement measuring device 45 is arranged in the covering portion of the housing 14 of the holder 10, and the other configuration is the same as that of the fine recess processing apparatus 31 shown in FIG.

  In the fine recess processing apparatus 51 in this embodiment, highly accurate shape data can be obtained without being affected by cutting fluid or the like.

  In the fine recess processing apparatus 51 (31) using the roller displacement measuring device 45 as a data acquisition means, when forming the fine recess on the inner peripheral surface Ba of the cylinder bore B, first, the main shaft 3 and the central axis of the cylinder bore B are The holder 10 is lowered together with the main shaft 3 and the processing roller 11 is inserted into the cylinder bore B.

  Next, as shown in FIG. 4, the housing 14 is moved by the operation of the pressing mechanism 20, the processing roller 11 is brought into contact with the inner peripheral surface Ba of the cylinder bore B, and the load detected by the load sensor 16 is set in advance. The operation of the pressing mechanism 20 is continued until the value reaches a value, and when the set value of the displacement is detected, the holder 10 is rotated together with the main shaft 3 after the operation of the pressing mechanism 20 is stopped. The processing roller 11 pressed against the peripheral surface Ba turns around the rotation axis L, and when the main shaft 3 is lowered in this state, a fine recess is formed in a wide region of the inner peripheral surface Ba of the cylinder bore B. It will be.

  At this time, when the processing roller 11 comes into contact with the inner peripheral surface Ba of the cylinder bore B, the shape data is output from the roller displacement measuring device 45.

  In this shape data, for example, the radius R of the cylinder bore B is the reference position of the displacement of the processing roller 11 in the initial state (the peripheral portion of the processing roller 11 in the initial state and the rotation axis L as shown in FIG. Distance; device reference length X), the amount of movement until the processing roller 11 comes into contact with the inner peripheral surface Ba of the cylinder bore B (movement amount Y of the housing 14), and the predetermined pushing amount of the processing roller 11 (depth of the fine recess) And Z) is determined as R = X + Y−Z.

  When the fine recess processing is completed, the pressing mechanism 20 is operated to move the processing roller 11 away from the inner peripheral surface Ba of the cylinder bore B, and then the holder 10 is lifted together with the spindle 3 that has stopped rotating. Then, the processing roller 11 is detached from the cylinder bore B.

  As described above, the fine recess processing apparatus 51 (31) according to this embodiment can perform transfer processing of the fine recess with a uniform depth by the processing roller 11, and at the same time, as shown in FIG. The processing roller 11 that is displaced while being in contact with the inner peripheral surface Ba of the cylinder while forming a fine recess is used as a measuring element. Therefore, the quality can be confirmed without requiring a special inspection process.

  7 and 8 show still another embodiment of the fine recess processing apparatus according to the present invention. As shown in FIG. 7, the fine recess processing apparatus 71 in this embodiment is shown in FIG. The difference from the processing device 51 is that a non-contact type displacement measuring device 15 that obtains shape data without contacting the inner peripheral surface Ba of the cylinder bore B is disposed in the vicinity of the processing roller 11 of the housing 14. The other condition is the same as that of the fine recess processing apparatus 51 shown in FIG. 4 in that the contact state of the processing roller 11 with respect to the inner peripheral surface Ba of the cylinder bore B is measured.

  In the fine recess processing apparatus 71 in this embodiment, as shown in the enlarged view of FIG. 8, the fineness acquired by the displacement measuring device 15 from the depth Z of the fine recesses obtained by the roller displacement measuring device 45 as described above. By reducing the depth Z ′ of the concave portion, it is possible to obtain the processing depth h of the fine concave portion with high accuracy. That is, the processing depth h of the fine concave portion with high accuracy is obtained from h = ZZ ′. Is possible.

  Here, when performing fine recess processing using the above-described micro recess processing apparatuses 1, 31, 51, 71, as shown in FIG. 9, pre-processing for adjusting the inner peripheral surface Ba of the cylinder bore B, The fine recess processing method of the present invention for performing post-processing for finishing the inner peripheral surface Ba of the formed cylinder bore B can be employed.

  In the fine recess processing method according to this embodiment, the cylinder bore B is subjected to pre-processing for adjusting the inner peripheral surface Ba of the cylinder bore B and fine recess processing performed using the fine recess processing apparatuses 1, 31, 51, 71 described above. In the case of forming the fine recesses on the inner peripheral surface Ba of the cylinder bore B, while the fine recesses are formed on the inner peripheral surface Ba of the cylinder bore B in the fine recess processing step, the displacement measuring device 15 and the roller displacement measuring device 45 The shape data of the inner peripheral surface Ba of the cylinder bore B is acquired, and the shape data obtained by the displacement measuring device 15 and the roller displacement measuring device 45, for example, the inner diameter of the cylinder bore B as shown in FIG. As shown in FIG. 11, the shape data of the cylinder bore B is fed back to the preprocessing process. Diameter adjusting the machining path K of cutting the boring head 91 so decreases gradually machining end side from the machining start side.

  In this fine recess processing method, the shape data of the inner peripheral surface Ba of the cylinder bore B obtained by the displacement measuring device 15 and the roller displacement measuring device 45 is fed back to the preprocessing step while the fine recess is formed. Since the processing conditions are adjusted, the precision of the fine recesses is improved, and in addition, the finishing process after forming the fine recesses is almost uniform over the entire inner peripheral surface Ba of the cylinder bore B. Therefore, it is possible to form a fine recess having a highly accurate depth.

  In the fine recess processing method described above, the case where the preprocessing is a cutting process using the boring head 91 has been shown. However, as shown in FIG. 12, the honing process using the honing grindstone 92 is used as the preprocessing process. The honing grindstone 92 is adjusted so that the expansion amount gradually decreases from the machining start side to the machining end side, or the grinding radius using the grindstone 93 is pre-processed as shown in FIG. May be adjusted to gradually decrease from the processing start side to the processing end side.

  Further, in the fine concave portion processing method, fine concave portion processing performed using the fine concave portion processing apparatuses 1, 31, 51, 71 and post-processing for finishing the inner peripheral surface Ba of the cylinder bore B in which the fine concave portion is formed are performed. After that, when forming the fine concave portion on the inner peripheral surface Ba of the cylinder bore B, the displacement measuring device 15 and the roller displacement are formed while the fine concave portion is formed on the inner peripheral surface Ba of the cylinder bore B in the fine concave portion processing step. The shape data of the inner peripheral surface Ba of the cylinder bore B is obtained by the measuring device 45, and the shape data obtained by the displacement measuring device 15 or the roller displacement measuring device 45, for example, the depth of the target fine recess as shown in FIG. Based on the shape data that the actual depth H of the fine recess (which varies with the hardness of the workpiece) is larger than h, the machining allowance m is determined by finishing and post-processing Do.

  At this time, as shown in FIG. 15, the honing process using the honing grindstone 92 is used as a post-processing process. For example, the processing roller 11 is configured so that the expansion amount of the honing grindstone 92 gradually increases from the processing start side to the processing end side. As shown in FIG. 16, for example, the turning radius of the grindstone 93 is gradually increased from the machining start side to the machining end side. As shown in FIG. 17, for example, the turning radius of the boring head 91 gradually increases from the machining start side to the machining end side. In this way, the swell C can be removed.

  In this fine concave portion processing method, finishing processing that is post-processing can be performed based on the shape data of the inner peripheral surface Ba of the cylinder bore B in which the fine concave portions are formed, so that the entire inner peripheral surface Ba of the cylinder bore B is covered. A fine recess having a substantially uniform groove depth can be formed in a short time.

It is sectional explanatory drawing of the tool holder which shows one Example of the fine recessed part processing apparatus of this invention. Example 1 It is a whole perspective explanatory drawing of the fine recessed part processing apparatus which comprised the tool holder shown in FIG. It is sectional explanatory drawing of the tool holder which shows the other Example of the fine recessed part processing apparatus of this invention. (Example 2). It is sectional explanatory drawing of the tool holder which shows the further another Example of the fine recessed part processing apparatus of this invention. (Example 3). It is a graph explaining the acquisition point of the shape data at the time of performing a fine recessed part processing with the fine recessed part processing apparatus in FIG. FIG. 4 is an explanatory view of the behavior of the processing roller as viewed from the plane direction showing the situation where the shape data is acquired from the displacement of the processing roller while performing the processing of the fine recess by the fine recess processing apparatus in FIG. It is a behavior explanatory view (b) of a roller. It is sectional explanatory drawing of the tool holder which shows the further another Example of the fine recessed part processing apparatus of this invention. (Example 4). It is the elements on larger scale which show simply the state where the processing roller of the tool holder in Drawing 7 is in contact with the inner skin of a cylinder bore. It is process explanatory drawing which shows one Example of the fine recessed part processing method of this invention. (Example 5) FIG. 10 is a cross-sectional explanatory view of a cylinder bore as shape data fed back to a pretreatment process in the fine recess processing method in FIG. 9. FIG. 10 is a cross-sectional explanatory view of a cylinder bore showing a machining path of a boring head for cutting adjusted based on shape data fed back to a preprocessing process in the fine recess machining method in FIG. 9. FIG. 10 is a cross-sectional explanatory diagram of a cylinder bore showing a honing grindstone machining path adjusted based on shape data fed back to a pretreatment process in the fine recess machining method in FIG. 9. FIG. 10 is a cross-sectional explanatory view of a cylinder bore showing a processing path of a grinding wheel for grinding adjusted based on shape data fed back to a preprocessing process in the fine recess processing method in FIG. 9. FIG. 10 is a partially enlarged cross-sectional explanatory view of a cylinder bore as shape data used in a post-processing process in the fine recess processing method in FIG. 9. FIG. 10 is a cross-sectional explanatory view of a cylinder bore showing a processing path of a honing grindstone adjusted for honing processing based on shape data used in a post-processing processing step in the fine recess processing method in FIG. 9. FIG. 10 is a cross-sectional explanatory view of a cylinder bore showing a processing path of a grinding wheel for grinding adjusted based on shape data used in a post-processing processing step in the fine recess processing method in FIG. 9. FIG. 10 is a cross-sectional explanatory view of a cylinder bore showing a machining path of a boring head for cutting adjusted based on shape data used in a post-processing machining step in the fine recess machining method in FIG. 9. It is the plane explanatory view (a) and cross-sectional explanatory drawing (b) of the cylinder block which has the fine recessed part formed with the fine recessed part processing apparatus and the fine recessed part processing method of this invention in the internal peripheral surface of a cylinder bore.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 31, 51, 71 Fine recessed part processing apparatus 3 Main axis | shaft 10 Holder 11 Processing roller 12 Roller shaft 13 Roller support part 15 Displacement measuring device (data acquisition means)
20 Pressing mechanism (load generating means)
21 Compression coil spring (pressing mechanism)
45 Roller displacement measuring device (roller displacement measuring means)
B Cylinder bore Ba Cylinder bore inner surface L Holder rotation shaft SB Cylinder block

Claims (5)

In a fine recess processing apparatus for forming a fine recess on the inner peripheral surface of a circular hole,
The main shaft, a holder that is coaxially mounted on this main shaft and rotates integrally, a processing roller having fine irregularities on the outer periphery, and a processing roller that can be rotated around a roller shaft that is provided on the holder and is parallel to the main shaft A roller support portion to be supported on the inner surface of the circular hole with a load applied in the radial direction of the processing roller to the roller support portion so that the central axis matches the rotation axis of the holder. Load generating means for pressing the unevenness, and data acquisition means provided in the holder to obtain shape data of the inner peripheral surface of the circular hole,
Non-contact type data acquisition means in which the data acquisition means obtains shape data without contacting the inner peripheral surface of the circular hole, and shape data of the inner peripheral surface of the circular hole based on the radial displacement of the processing roller And a roller displacement measuring means for obtaining a fine recess processing apparatus.   The load generating means is a pressing mechanism that causes the processing roller to contact the inner peripheral surface of the circular hole and continues the operation until the load detected by the load sensor reaches a preset value. The fine recessed part processing apparatus of description.   When forming the fine recesses on the inner peripheral surface of the circular hole through pretreatment processing for adjusting the inner peripheral surface of the circular hole and fine recess processing using the fine recess processing device according to claim 1 or 2, While forming the minute recesses on the inner peripheral surface of the circular hole in the process of processing the fine recesses, the shape data is obtained without contacting the inner peripheral surface of the circular hole, and the radial displacement of the processing roller is obtained. Based on this, the shape data of the inner peripheral surface of the circular hole is acquired, and the shape data of the inner peripheral surface of the circular hole obtained by this data acquisition means is fed back to the preprocessing step to adjust the preprocessing processing conditions. A method for processing fine recesses characterized by Fine processing is performed on the inner peripheral surface of the circular hole through fine concave processing performed using the micro concave processing device according to claim 1 and post-processing to finish the inner peripheral surface of the circular hole in which the micro concave portion is formed. When forming the concave portion, while forming the fine concave portion on the inner peripheral surface of the circular hole in the step of processing the fine concave portion, the shape data is obtained without contacting the inner peripheral surface of the circular hole, and the processing roller is obtained. The shape data of the inner peripheral surface of the circular hole was acquired based on the displacement in the radial direction, and obtained by this data acquisition means
A fine recess processing method, wherein post-processing is performed based on shape data of an inner peripheral surface of a circular hole. The fine recessed part processing method of Claim 4 which performs the pre-processing process which arranges the internal peripheral surface of a circular hole before a fine recessed part process.

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