JP3974363B2 - Internal surface processing method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and apparatus for honing at least a cylindrical inner peripheral surface formed on a workpiece.
[0002]
[Prior art]
Conventionally, honing is known as a method for machining the inner peripheral surface of a workpiece with high accuracy. In this honing process, a honing tool having a front end provided with a grindstone is inserted into the workpiece, and the honing tool is reciprocated in the axial direction in a state where the grindstone is in contact with the inner peripheral surface of the workpiece. At the same time, the rotation is performed.
[0003]
[Problems to be solved by the invention]
In the conventional honing method, the honing tool must be reciprocated in the axial direction while being rotationally driven, and there is an inconvenience that the drive mechanism for that is complicated.
[0004]
As a means for eliminating such inconvenience, a method is conceivable in which the honing tool is inserted into the workpiece from the opposite side of the main shaft while the workpiece is mounted on the main shaft and rotated integrally with the main shaft. According to this method, the honing tool only needs to reciprocate in the axial direction, and its driving mechanism is simplified. However, in this method, it is necessary to arrange the long honing tool and the main shaft in a straight line, and there is a disadvantage that the entire apparatus becomes large (particularly in the axial direction).
[0005]
Further, as a further disadvantage of the conventional honing machine, when internal grinding of a workpiece is performed as a pre-processing of the honing process, a honing machine and an internal grinding machine must be provided as equipment, and the equipment is very large. It will be a thing. In addition, the workpieces must be individually set up in each of the inner surface grinding machine and the honing machine, which is inconvenient and difficult to center.
[0006]
In view of such circumstances, the present invention has an object to enable a honing process with a simple honing tool movement while maintaining a compact structure, and more preferably a grinding process as a pre-process of the honing process. The purpose is to reduce the necessary equipment and improve the machining efficiency by eliminating the need for changeover.
[0007]
[Means for Solving the Problems]
  As means for solving the above problems, the present invention provides:A workpiece having a cylindrical inner peripheral surface is mounted on the front end portion of the main shaft having an insertion hole on the rotation center shaft, the step of rotating the mounting portion together with the main shaft, and the workpiece while rotating the grinding wheel for internal grinding. Inserting the workpiece into the inner side of the workpiece from the front and grinding the inner peripheral surface of the workpiece with the inner surface grinding wheel, and after the inner surface grinding, the workpiece is mounted on the main shaft through the insertion hole of the main shaft. The honing tool is inserted into the work piece from the rear and the honing tool grindstone is reciprocated in the axial direction while contacting the inner peripheral surface of the work piece while the spindle and the work piece are rotating. And an inner surface processing method including a step of honing the peripheral surface.
[0008]
Here, “front” and “rear” mean “the opposite side of the main shaft across the workpiece” and “the same side as the main shaft”, respectively, and the orientation of the main shaft and honing tool is limited to the horizontal direction. Not the purpose. For example, these spindles and honing tools may be arranged in the vertical direction.
[0009]
In the above method, the honing tool is inserted inside the work piece while rotating the work piece together with the main shaft. Therefore, the honing tool only needs to reciprocate in the axial direction, and does not need to be driven to rotate. . Moreover, since the honing tool is inserted into the workpiece from the rear through the insertion hole provided on the rotation center axis of the main shaft, compared with the case where the honing tool is inserted into the workpiece from the front. The axial space required for machining is greatly reduced.
[0012]
  In addition, with the work piece attached to the front end of the spindle, internal grinding can be performed by inserting an internal grinding wheel from the front, and then a honing tool is inserted from the rear. (Finishing processing) can be performed.
  Therefore, unlike the conventional method in which internal grinding and honing are performed by independent machine tools, there is no need to change the workpiece during the transition from internal grinding to honing. And centering is not required.
[0013]
  Further, the present invention is an apparatus for carrying out the above method, wherein a main shaft having an insertion hole on a rotation center shaft, a support member for rotatably supporting the main shaft, and a main shaft driving means for rotationally driving the main shaft And a workpiece holding means for holding a workpiece having a cylindrical inner peripheral surface provided at the front end portion of the main shaft, and a relative rotation that is movable in the axial direction with respect to the main shaft in the insertion hole of the main shaft In order to be able to insert the front end portion into the workpiece held by the workpiece holding means from the rear side and to perform the honing process on the inner peripheral surface of the workpiece at the front end portion. A honing tool provided with a grinding wheel and honing operation means for reciprocating the honing tool in the axial directionA cylindrical holding operation member interposed between the honing tool and the main shaft so as to be relatively movable in the axial direction between the honing tool and the main shaft; and a holding drive means for moving the holding operation member in the axial direction. And the workpiece holding means is switched between a state of holding the workpiece and a state of releasing the workpiece in conjunction with the axial movement of the holding operation member.Honing machine.
[0014]
  According to this apparatus, since the workpiece is rotationally driven integrally with the main shaft while being held by the workpiece holding means, the honing operation means may simply reciprocate the honing tool in the axial direction. Since there is no need for rotational driving, the configuration is simplified. In addition, since the honing tool is inserted into the workpiece from the rear through the insertion hole provided on the rotation center axis of the main shaft, the shaft of the entire apparatus is compared with the honing tool arranged in front of the workpiece. Directional dimensions are greatly reduced.
  Further, the workpiece holding means can be switched between the holding state and the released state by a simple drive mechanism that only moves the holding operation member in the axial direction. Moreover, since the holding operation member is cylindrical and is interposed between the honing tool and the main shaft, the workpiece holding means can be switched while maintaining the entire apparatus in a compact structure.
[0015]
In this apparatus, a honing tool support member is provided between the workpiece holding means and the honing operation means, and the honing tool support member is rotatable relative to one of the main shaft and the honing tool and the other. However, it is more preferable that the main shaft is interposed between the inner peripheral surface of the main shaft and the outer peripheral surface of the honing tool so as to be movable in the axial direction.
[0016]
According to this configuration, the honing tool is supported on the main shaft side via the honing tool support member at a position between the workpiece holding means and the honing operation means, and the honing tool is supported even when the honing tool is long. Stiffness can be increased. In addition, the honing tool support member only needs to be disposed in a state in which the honing tool support member can rotate relative to one of the main shaft and the honing tool and can move in the axial direction with respect to the other. Thus, the honing tool can be moved in the axial direction with respect to the main shaft and maintained in a relatively rotatable state.
[0017]
The workpiece holding means is not limited as long as it can hold the workpiece on the main shaft side, and various conventional structures can be applied. As the workpiece holding means, a cylindrical rear support member can be used. And a gripping claw that presses the workpiece toward the rear from the front in a state where the rear end surface of the workpiece hits the rear support member, and passes through the inside of the rear support member to the inside of the workpiece. What is comprised so that the front-end part of a honing tool may be inserted is suitable.
[0018]
According to this configuration, since the workpiece is clamped in the axial direction by the rear support member and the gripping claws, the workpiece is distorted in the radial direction as compared with the structure in which the workpiece is strongly held from the outside in the radial direction. It is extremely small and the machining accuracy is improved accordingly. In addition, the honing tool can be inserted into the workpiece without inconvenience through the inside of the rear support member.
[0021]
Further, the present invention holds any one of the above honing processing devices and an internal grinding wheel, and inside the workpiece held by the workpiece holding means of the honing processing device while rotationally driving the internal grinding wheel. It is an internal surface processing apparatus provided with the internal surface grinding apparatus which grinds the internal peripheral surface of the said workpiece by inserting.
[0022]
According to this apparatus, the spindle and the workpiece holding means can be utilized for both internal grinding and honing. In other words, it is possible to perform both internal grinding and honing of the same workpiece using a common spindle and workpiece holding means, and the equipment is greatly simplified. Moreover, since the honing tool is inserted into the insertion hole of the main shaft, only the inner surface grinding device needs to be opposed to the front of the workpiece, and the space of the entire device is greatly reduced. In addition, it is not necessary to change the setup of the workpiece when shifting from the internal grinding process to the honing process, and centering is not necessary.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of the present invention will be described with reference to the drawings.
[0024]
In FIG. 1, an internal grinding device 12 and a honing device 14 are arranged on a common base 10 so as to face each other.
[0025]
The internal grinding device 12 includes a wheel head 16, and a main shaft is rotatably supported in the wheel head 16, and a motor that rotationally drives the spindle is incorporated therein. A tool mounting portion 18 is provided at the front end of the main shaft, and a grindstone shaft having an internal grinding wheel 20 is mounted on the tool mounting portion 18.
[0026]
The honing apparatus 14 includes a main shaft 22 arranged in a horizontal direction, a chuck portion (workpiece holding means) 24 provided at a front end portion (right end portion in FIG. 1) of the main shaft 22, and the main shaft 22 as a bearing 25. And a housing (main shaft support means) 26 rotatably supported around the central axis thereof, the rear end portion of the main shaft 22 protrudes rearward from the housing 26, and the main shaft 22 is driven to rotate at the rear end portion. Main shaft driving means 28 is connected.
[0027]
The main shaft driving means 28 includes a driven pulley 29 fixed to the rear end portion of the main shaft 22 protruding rearward from the housing 26, a main shaft driving motor 34 as a driving source, and a driving pulley 30 connected to the output shaft. And a transmission belt 32 spanned between the pulleys 29 and 30. Further, a holding drive means 64 (described later) and a honing operation means 90 shown in FIG. 5 are provided further behind the spindle drive means 28.
[0028]
Next, the structure of the chuck portion 24 will be described with reference to FIGS.
[0029]
The workpiece W to be processed has a cylindrical shape with a cylindrical inner peripheral surface, and the chuck portion 24 holds the workpiece W in a state where the center axis thereof coincides with the rotation center axis of the main shaft 22. It is configured. Specifically, the chuck portion 24 includes a cylindrical rear support member 36 and a plurality of chucks that press the work W from the front toward the rear in a state where the rear end surface of the work W is in contact with the rear support member 36. Gripping claws 38 and support claws 40 that support the workpiece W from the outside in the radial direction, and these gripping claws 38 and support claws 40 are alternately arranged in the circumferential direction.
[0030]
The holding claw 38 and the support claw 40 release the workpiece W away from the workpiece W as shown by the holding position for holding the workpiece W as shown by the solid line in FIG. It can be switched to the release position.
[0031]
Among these, first, a switching mechanism (opening / closing mechanism) of the gripping claws 38 will be described. A donut plate-like substrate 42 is fixed to the front end of the main shaft 22, and a plurality of sleeves 44 are fixed to the outer peripheral portion of the substrate 42. Yes. Each sleeve 44 extends in a direction parallel to the rotation center axis of the main shaft 22, and a support shaft 46 is inserted inside the sleeve 44 so as to be movable in the axial direction. A gripping claw 38 is fixed to the front end of the support shaft 46 by a bolt 48. Yes.
[0032]
A cam groove 46a is formed on the outer peripheral surface of the support shaft 46 so as to be inclined with respect to the axial direction. On the other hand, a pin 44a projects inward from the sleeve 44, and the pin 44a projects into the cam groove 46a. It is inserted. Then, as the support shaft 46 moves in the axial direction (front-rear direction) in the sleeve 44, the grip claw 38 is integrated with the rear grip position (solid line position in FIG. 2) and the front release position (same as the same). (The position of the two-dot chain line in FIG. 2) and the cam claw 38 so that the gripping claw 38 rotates around the central axis of the support shaft 46 integrally with the support shaft 46 along with the movement. The shape of the groove 46a is set.
[0033]
A support wall 49 is provided in a region surrounded by each sleeve 44, and the rear support member 36 is fixed to the central portion of the support wall 49 so as to penetrate the support wall 49.
[0034]
Next, the opening / closing mechanism of the support claw 40 will be described. A diaphragm 50 having a thin front wall is fixed to the front surface of the substrate 42, and the diaphragm 50 has a front wall 50a that can be bent and deformed in the front-rear direction. Yes. A sleeve 51 is fixed to the central portion of the front wall 50a, and a support shaft 52 protruding in a direction parallel to the axial direction of the main shaft 22 is fixed to the front surface of the front wall 50a. The support claw 40 is fixed to the base.
[0035]
On the other hand, the main shaft 22 has a large-diameter cylindrical shape having an insertion hole on the rotation center axis, and a honing tool T described later is inserted on the rotation center axis. A cylindrical draw bar 54 that is a holding operation member is interposed therebetween.
[0036]
In the draw bar 54, relative rotation with respect to the main shaft 22 is restricted by fitting between an axial groove 54a provided on the outer peripheral surface of the draw bar 54 and a pin 62 fixed to the main shaft 22 side. It is allowed to move in the axial direction. In accordance with the movement of the draw bar 54 in the axial direction, the support shaft 46 and the grip claw 38 are switched in the front-rear direction, and at the same time, the support claw 40 is opened and closed.
[0037]
Specifically, an opening / closing operation sleeve 58 is provided at the front end portion of the draw bar 54, and the opening / closing operation sleeve 58 is fixed to the front end portion of the draw bar 54 by a screw 58b on its inner peripheral surface, while a pressing operation ring is provided from the front end. The part 58a protrudes forward. The base portion of the connecting arm 60 is sandwiched between the pressing operation ring portion 58a and the head portion of the protruding portion 56 provided rearward of the pressing operation ring portion 58a, and the free end portion of the arm 60 is the support shaft 46. It is fixed to the rear end.
[0038]
In this structure, when the draw bar 54 and the opening / closing operation sleeve 58 are at the rear end position shown by the solid line in FIG. 2, the connecting arm 60, the support shaft 46, and the gripping claws 38 are pulled backward together, and the gripping claws 38 holds the workpiece W from both sides in the axial direction (front-rear direction) together with the rear support member 36, while the front wall 50a of the diaphragm 50 remains undeformed and is attached to the front wall 50a via the support shaft 52. The supporting claw 40 is maintained at a position for supporting the workpiece W from the outside in the radial direction. On the other hand, when the draw bar 54 and the opening / closing operation sleeve 58 are pushed forward, the connecting arm 60, the support shaft 46, and the gripping claws 38 are pushed forward together with the draw bar 54 and the opening / closing operation sleeve 58, and the gripping claws 38 are pushed forward. On the other hand, when the pressing operation ring portion 58a of the opening / closing operation sleeve 58 presses the inner peripheral edge portion of the front wall 50a of the diaphragm 50 forward, the inner peripheral edge portion moves forward with the bending deformation of the front wall 50a. As a result, the support shaft 52 fixed to the front wall 50a is inclined (the displacement is greatly exaggerated in the two-dot chain line in FIG. 1), and as a result, each support claw 40 is moved radially from the workpiece W. It is switched to a release position that is separated outward.
[0039]
The draw bar 54 is driven in the axial direction by holding drive means 64 as shown in FIGS. The holding drive means 64 is erected on the bed 10 at a position immediately behind the driven pulley 29.
[0040]
As shown in FIG. 4, the holding drive means 64 includes a housing 72. A drawbar support sleeve 68 is rotatably held inside the housing 72 via a bearing 70, and the sleeve 68 is driven by a bolt 67. Fastened to the pulley 29. That is, the draw bar support sleeve 68 rotates integrally with the driven pulley 29 and the main shaft 22. The rear end of the draw bar 54 is inserted into the draw bar support sleeve 68 so as to be relatively movable in the axial direction.
[0041]
A flange-shaped piston portion 54a is formed on the outer peripheral surface of the draw bar 54, while the inner peripheral portion of the driven pulley 29 and the inner peripheral edge of the front end of the draw bar support sleeve 68 are positioned in front of and behind the piston portion 54a, respectively. Hydraulic chambers 65 and 66 are formed. Further, hydraulic oil supply / discharge ports 74 and 76 are formed at appropriate positions of the housing 72, and the ports 74 are communicated with the hydraulic chamber 66 through an oil passage 78 formed in the housing 72 and the drawbar support sleeve 68. In addition, the port 76 is communicated with the hydraulic chamber 65 through an oil passage 79 formed in the housing 72, the draw bar support sleeve 68, and the driven pulley 29.
[0042]
Accordingly, when hydraulic fluid is supplied from the port 74 through the oil passage 78 into the hydraulic chamber 66, the piston portion 54 a receives the pressure and the entire draw bar 54 is pushed forward, while the oil passage 79 from the port 76. By supplying hydraulic oil into the hydraulic chamber 65 through the draw bar 54, the entire draw bar 54 is drawn backward.
[0043]
As a feature of the honing device 14, the honing tool T is inserted inside the main shaft 22 (in the insertion hole), and is movable in the axial direction and relatively rotatable with respect to the main shaft 22.
[0044]
As shown in FIG. 2, the honing tool T includes a long main body shaft 80 and a honing head 84 fixed to the front end of the main body shaft 80, and a honing process is performed on the tip of the honing head 84. A grindstone 82 is mounted. The honing grindstone 82 passes through the inside of the rear support member 36 in the chuck portion 24 and can be inserted from the rear into the workpiece W held by the chuck portion 24.
[0045]
A honing tool support member 86 that supports the honing tool T interposed between the draw bar 54 disposed in the main shaft 22 and the honing tool T is provided at the front portion of the main shaft 22. The honing tool support member 86 has a substantially cylindrical shape, and a bearing 85 is disposed between the outer peripheral surface of the honing tool support member 86 and the inner peripheral surface of the draw bar 54 so as to be relatively rotatable. Between the inner peripheral surface and the outer peripheral surface of the honing tool main body shaft 80, a bearing 88 that couples the honing tool main body shaft 80 so as to be relatively movable in the axial direction is interposed. That is, the honing tool support member 86 is capable of rotating relative to the draw bar 54 and the main shaft 22 while supporting the honing tool T so as to be relatively movable in the axial direction.
[0046]
The rear end of the main shaft 80 of the honing tool T is coupled to honing operation means 90 as shown in FIG. The honing operation means 90 realizes honing by reciprocating the main body shaft 80 in the axial direction.
[0047]
The honing operation means 90 includes a frame 92 installed on the bed 10. Both ends of a feed screw shaft 94 extending in the front-rear direction are rotatably supported by the frame 92 via bearings 93. A nut member 96 is screwed onto the feed screw shaft 94, and a rear end of the main body shaft 80 of the honing tool T is connected to the nut member 96 via a connecting arm 98 in the vertical direction. Then, when the screw shaft 94 is rotationally driven in a short cycle in the forward and reverse directions by the rotational driving means 100, the nut member 96 and the main body shaft 80 of the honing tool T are integrated with each other. It is designed to reciprocate in the axial direction.
[0048]
As the rotation driving means 100, a pulley 102 is fixed to the rearmost end of the feed screw shaft 94, and a motor support wall 104 is connected to the rear side wall 92a of the frame 92. The motor 106 is fixed backward. A pulley 108 is fixed to the output shaft 107 of the honing drive motor 106, and a transmission belt 110 is stretched between the pulley 108 and the pulley 102. Therefore, when the output shaft 107 of the honing drive motor 106 rotates in the forward and reverse directions, the driving force is transmitted to the feed screw shaft 94 by the winding transmission mechanism including the pulleys 108 and 102 and the belt 110. It has become.
[0049]
Next, a method for grinding and honing the inner peripheral surface of the workpiece W using this inner surface processing apparatus will be described.
[0050]
1) Grinding
While the honing tool T is retracted to the rear position (solid line position in FIG. 2), the gripping claws 38 and the support claws 40 are opened by moving the draw bar 54 forward. That is, both the claws 38 and 40 are switched to the release position shown by the two-dot chain line in FIG.
[0051]
In this state, the workpiece conveying device (not shown) positions the workpiece W at a position where the rear end surface of the workpiece W comes into contact with the front end surface of the rear support member 36. In this state, the draw bar 54 is moved backward to move the gripping claws 38 and the supporting claws 40. Is switched to the holding position indicated by the solid line in FIG. As a result, the workpiece W is sandwiched in the axial direction by the rear support member 36 and the gripping claws 38 and is supported by the support claws 40 from the radially outer side. That is, the workpiece W is held by the chuck portion 24.
[0052]
Next, the main shaft drive motor 34 shown in FIG. 1 is operated to rotationally drive the main shaft 22 as a whole. At this time, the workpiece W held by the chuck portion 24 also rotates integrally with the main shaft 22 around its central axis. On the other hand, the main shaft of the inner surface grinding device 12 and the grindstone shaft attached to the inner surface grinding device 12 are inserted into the workpiece W from the front (from the right side in FIG. 1) while rotating at high speed integrally, and the diameter of the workpiece W is The inner circumferential surface is ground by pressing the inner grinding wheel 20 against the inner circumferential surface of the workpiece W by cutting and feeding in the direction.
[0053]
2) Honing process
After the grinding process is completed, the internal grinding wheel 20 is retracted from the workpiece W. The workpiece W can be continuously honed while being held by the chuck portion 24. Specifically, the honing tool T is advanced while the rotation of the main shaft 22 is continued, and the honing grindstone 82 is inserted from the rear into the workpiece W through the rear support member 36, and this The entire honing tool T may be reciprocated in the axial direction while the inner peripheral surface of the workpiece W and the grindstone 82 are in contact with each other. Good honing (finishing) can be performed on the inner peripheral surface of the workpiece W by a combination of the reciprocating motion of the honing tool T and the rotation of the workpiece W driven integrally with the main shaft 22.
[0054]
Therefore, according to this method, the honing tool T is driven only in the axial direction and does not need to be driven to rotate, and a good honing process can be realized with a completely simple driving method. Moreover, since the honing tool T is inserted into the workpiece from the rear through the insertion hole provided on the rotation center axis of the main shaft 22, the honing tool T is inserted from the front (that is, opposite to the main shaft 22). Compared to inserting a honing tool (from the side), the overall axial dimension of the device is greatly reduced.
[0055]
Furthermore, when honing is performed following internal grinding as in this embodiment, the spindle 22 and the chuck portion 24 are shared for both machining, so that the workpiece can be transferred during the transition from internal grinding to honing. It is possible to eliminate the need for W setup change, to dramatically shorten the cycle time, and to eliminate the need for centering. Further, compared to the case where an internal grinding machine and a honing machine are provided together, the necessary facilities are greatly simplified, and the space of the entire apparatus is greatly reduced.
[0056]
The honing apparatus according to the present invention is not limited to use in combination with an internal grinding apparatus, but also exhibits excellent effects when performing only honing.
[0057]
In addition, the present invention can take the following embodiments, for example.
[0058]
・ About work holding means
The workpiece holding means only needs to be able to hold the workpiece on the main shaft side, and various conventionally used structures, for example, holding the workpiece from the outside in the radial direction, and attracting using a magnetic force. It is also possible to apply. However, if the workpiece W is sandwiched in the axial direction by the rear support member 36 and the gripping claws 38 as in the illustrated chuck portion 24, the workpiece W is radially aligned regardless of the material of the workpiece W. The workpiece W can be reliably held without causing almost any distortion of the workpiece, and the honing grindstone is formed inside the workpiece W through the rear support member 36 by making the rear support member 36 cylindrical. 82 can be smoothly inserted.
[0059]
Further, the draw bar 54 is not necessarily required, and other holding switching means may be provided. When this draw bar 54 is used, if the draw bar 54 is formed in a cylindrical shape and interposed between the main shaft 22 and the honing tool T as shown in the drawing, the draw bar 54 as a holding switching member is maintained while maintaining a compact structure. Can be suitably arranged.
[0060]
・ About the honing tool support member 86
The honing tool support member 86 is not necessarily provided. For example, when the honing tool T is not long, it can be omitted as appropriate. Even when the honing tool support member 86 is provided, the position of the honing tool support member 86 can be arbitrarily set in the region between the workpiece holding means and the honing operation means 90. However, high support rigidity can be obtained by providing the honing tool support member 86 in the vicinity of the workpiece holding means (chuck portion 24), that is, the front side portion as shown in the figure.
[0061]
In the illustrated example, the honing tool support member 86 and the honing tool T are relatively movable in the axial direction, and the honing tool support member 86 and the main shaft 22 are relatively rotatable. And the honing tool T may be relatively rotatable, and the honing tool support member 86 and the main shaft 22 may be movable in the axial direction.
[0062]
Similarly, in the illustrated example, the honing tool support member 86 is coupled to the draw bar 54 via the bearing 85, but when the draw bar 54 is omitted, the honing tool support member 86 may be coupled directly to the main shaft 22. .
[0063]
【The invention's effect】
As described above, the present invention attaches a workpiece having a cylindrical inner peripheral surface to the front end portion of the main shaft having the insertion hole on the rotation center axis, and rotates the mounting portion together with the main shaft through the insertion hole. A honing tool is inserted into the inside of the workpiece from the rear, and the inner peripheral surface is honed by reciprocating in the axial direction while bringing the grindstone of the honing tool into contact with the inner peripheral surface of the workpiece. Therefore, honing can be performed with a simple honing tool movement while maintaining a compact structure.
[0064]
Furthermore, when grinding as pre-processing, the inner grinding wheel is inserted into the inner side of the workpiece mounted on the main spindle from the front while rotating the inner grinding wheel and driven by the inner grinding wheel. After grinding a surface, a honing tool is inserted into the work piece from the rear through the insertion hole of the main spindle while the work piece is mounted on the main spindle, thereby performing the honing process. In addition, it is possible to reduce the equipment required for the honing process, and to eliminate the need for a setup change operation, thereby greatly reducing the cycle time.
[Brief description of the drawings]
FIG. 1 is a front view showing an overall configuration of an inner surface machining apparatus according to an embodiment of the present invention.
FIG. 2 is a cross-sectional front view showing a chuck portion of a honing apparatus in the inner surface processing apparatus.
FIG. 3 is a side view of the chuck portion.
FIG. 4 is a cross-sectional front view showing a draw bar driving means in the honing apparatus.
FIG. 5 is a sectional front view showing honing operation means in the honing apparatus.
[Explanation of symbols]
10 Internal processing equipment
12 Internal grinding equipment
14 Honing machine
20 Grinding wheel for internal grinding
22 Spindle
24 Chuck part (workpiece holding means)
26 Housing (main shaft support means)
28 Spindle drive means
36 Rear support member
38 gripping claws
54 Drawbar (holding operation member)
64 Holding drive means
80 Honing tool body shaft
82 Grinding wheel for honing
90 Honing operation means
T Honing Tool

Claims (5)

  A workpiece having a cylindrical inner peripheral surface is mounted on the front end portion of the main shaft having an insertion hole on the rotation center shaft, the step of rotating the mounting portion together with the main shaft, and the workpiece while rotating the grinding wheel for internal grinding. Inserting the workpiece into the inner side of the workpiece from the front and grinding the inner peripheral surface of the workpiece with the inner surface grinding wheel, and after the inner surface grinding, the workpiece is mounted on the main shaft through the insertion hole of the main shaft. The honing tool is inserted into the work piece from the rear, and the honing tool grindstone is reciprocated in the axial direction while contacting the inner peripheral surface of the work piece with the work piece and the main shaft rotating. And a honing process for the inner peripheral surface. A main shaft having an insertion hole on the rotation center shaft, a main shaft support means for rotatably supporting the main shaft, a main shaft drive means for rotating the main shaft, and a cylindrical inner peripheral surface provided at the front end of the main shaft A workpiece holding means for holding a workpiece having a workpiece, and inserted into the insertion hole of the spindle so as to be axially movable relative to the spindle and rotatable relative to the spindle, and held by the workpiece holding means. A honing tool in which a front end portion can be inserted from the rear side into the inner side of the workpiece and a grindstone for honing the inner peripheral surface of the workpiece is provided at the front end portion, and the honing tool in the axial direction. the Rutotomoni a honing operation means for reciprocating the cylindrical holding operation member interposed in relatively movable in the axial direction with respect to both between the honing tool and the spindle, the holding operation member axis And a holding drive means for moving the direction, honing, characterized in that the workpiece holding means in conjunction with the axial movement of the holding operation member is switched to the state to release the state that holds the workpiece Processing equipment. The honing processing apparatus according to claim 2 , wherein a honing tool support member is provided between the workpiece holding means and the honing operation means, and the honing tool support member is provided for either the main shaft or the honing tool. A honing apparatus characterized by being interposed between an inner peripheral surface of the main shaft and an outer peripheral surface of a honing tool in a state of being capable of relative rotation and axially movable with respect to the other. 4. The honing apparatus according to claim 2 , wherein the workpiece holding means includes a cylindrical rear support member, and the workpiece is moved from the front to the rear in a state where the rear end surface of the workpiece hits the rear support member. A honing apparatus comprising: a gripping claw that presses toward the head, and configured to insert a front end portion of the honing tool into the workpiece through the inside of the rear support member. The honing apparatus according to any one of claims 2 to 4 and an internal grinding wheel are held, and the workpiece held by the workpiece holding means of the honing apparatus while rotating the internal grinding wheel. An inner surface processing apparatus comprising an inner surface grinding device for grinding an inner peripheral surface of the workpiece by inserting the inner surface into the inner surface.

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