JP2006035371A - Spindle hole polishing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polishing device capable of repolishing a tapered hole of a spindle in the installed state to a machine tool, thereby eliminating troublesome and time-taking inefficient work of diassembling the spindle from the machine and assembling it, to perform easy, convenient and efficient repolishing of the tapered hole of the spindle. <P>SOLUTION: The portable spindle hole polishing device 1 is composed of a base frame 2 that can be installed at the machine tool S; a polishing mechanism 5 having a rotary polishing tool 23 capable of polishing the tapered hole of the spindle of the machine tool S; an attitude adjusting mechanism B capable of adjustably setting the attitude of the rotary polishing tool 23 to the base frame 2; and a moving mechanism 9 capable of moving the rotary polishing tool 23 in the state of its attitude to the base frame 2 being determined by the attitude adjusting mechanism B, in the direction of its rotation axis X. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a spindle hole polishing apparatus that allows a spindle hole in a machine tool such as a lathe or a milling machine to be re-polished while being disassembled and moved without being disassembled. is there.

  Conventionally, the taper hole in the spindle of a machine tool such as a machining center may become worn or wrinkled over a long period of use, and this will affect the machining system, so the taper hole will be polished after a certain period of time or a certain period of use. A re-grinding process is performed. In order to perform this re-polishing treatment, the spindle was disassembled from the machine tool and removed, and set on a dedicated internal grinding machine for polishing.

However, the means for removing the main shaft and re-polishing it is very troublesome and takes a lot of time and is inefficient, so some countermeasures are desired. In addition, what was disclosed by patent document 1 is known as an example regarding attachment or detachment of the spindle of a machine tool.
JP 2003-159622 A

  In view of such circumstances, the object of the present invention is to propose a polishing apparatus that can re-grind the tapered hole of the main shaft while it is assembled to the machine tool, thereby disassembling the main shaft from the machine. In addition, it eliminates the cumbersome and time-consuming inefficient work of assembling, and makes it possible to re-polish the tapered hole of the spindle easily and conveniently.

  The structure of claim 1 is the main shaft hole polishing apparatus, wherein the base frame 2 can be installed on a machine tool, the polishing mechanism 5 having a rotary polishing tool 23 capable of polishing a taper hole 46 of the main shaft 43 of the machine tool, An attitude adjustment mechanism B capable of variably setting the attitude of the rotary polishing tool 23 relative to the frame 2, and the rotary polishing tool 23 in a state where the attitude relative to the frame 2 is determined by the attitude adjustment mechanism B. And a moving mechanism 9 movable in the X direction.

  According to a second aspect of the present invention, in the spindle hole polishing apparatus according to the first aspect, the posture adjusting mechanism B supports the polishing mechanism 5 so as to be rotatable about the horizontal axis P with respect to the frame 2. In addition, a locking mechanism 6 that prevents the polishing mechanism 5 from rotating relative to the frame 2 is provided, and the angle θ of the rotation axis X with respect to the horizontal plane is configured to be adjustable. Features.

  According to a third aspect of the present invention, in the main shaft hole polishing apparatus according to the second aspect, the locking mechanism 6 receives the rotation of the rotary polishing tool 23 downward and swinging about the horizontal axis P, and It is characterized by being provided with a mounting tool 6B that can be freely adjusted in height relative to the frame 2.

  The configuration of claim 4 is the spindle hole polishing apparatus according to any one of claims 1 to 3, wherein the moving mechanism 9 is supported by the base frame 2 via the posture adjusting mechanism B. 3, a carriage 4 that supports the polishing mechanism 5 and is slidably supported with respect to the cradle 3, and a screw feeding means n that slidably slides the carriage 4 with respect to the cradle 3. It is comprised from these.

  According to a fifth aspect of the present invention, there is provided the spindle hole polishing apparatus according to the fourth aspect, wherein the screw feeding means n is a screw shaft 10 supported on the cradle 3 so as to be rotatable and immovable in the axial direction. A top member 14 mounted on the carriage 4 is engaged with the screw shaft 10 and an operation handle 11 for manually rotating the screw shaft 10 is provided.

  According to a sixth aspect of the present invention, in the spindle hole polishing apparatus according to the fifth aspect, the underframe 2 includes a bottom plate 2a for mounting and mounting on a machine tool, and an attitude adjustment mechanism B for the polishing mechanism 5. The left and right side plates 2c and 2d rising from the left and right end portions of the bottom plate 2a to be supported via the bottom plate 2a, and the back plate 2b connecting the rear end portions of the side plates 2c and 2d are formed in a substantially box-like shape. In addition, the back plate 2b is formed with a large operating hole 7 for manually rotating the operation handle 11 from the outside.

  According to the configuration of claim 1, since the polishing mechanism is provided on the underframe via the attitude adjustment mechanism and the moving mechanism as the spindle hole polishing apparatus, the spindle hole polishing apparatus can be carried and installed on a machine tool. That is, the spindle can be polished by carrying the spindle hole polishing apparatus while the spindle is attached to the machine tool. In other words, since the spindle hole polishing machine can be brought to the machine tool, the troublesome and time-consuming work of disassembling and assembling the spindle from the machine tool is eliminated when re-polishing the tapered hole. Thus, the taper hole of the spindle can be re-polished easily and conveniently.

  According to the configuration of the second aspect, since the angle of the rotary polishing tool with respect to the horizontal plane can be increased or decreased by the posture adjusting mechanism, the main shaft having a horizontal rotation axis, that is, the tapered hole is formed on the inner peripheral surface of the tapered hole at the lowest end position. In this state, polishing can be performed by moving the rotary polishing tool substantially in the direction of the main shaft rotation axis. That is, by setting the frame on the machine tool so that the rotation axis of the rotary polishing tool and the rotation axis of the main shaft coincide with each other in a plan view, the posture of the rotary polishing tool is adjusted with respect to the horizontal plane (with respect to the frame). It is only necessary to adjust the position of the vertical angle. For example, compared with the structure that adjusts the vertical angle and the left and right turning angle, there are few adjustment elements, the structure is simple, the number of parts is small, and the spindle is inexpensive. A hole polishing apparatus can be provided.

  According to the configuration of the third aspect, a simple structure in which a pivot structure that allows the rotary polishing tool to swing around the horizontal axis and a mounting tool that receives the rotary polishing tool that descends and swings is provided. Therefore, there is an advantage that the posture adjustment mechanism can be configured at a low cost with a simple structure.

  According to the fourth aspect of the present invention, the carriage can be slidably supported with high precision using the frame side receiving platform and the polishing mechanism side carriage, and the carriage, that is, the polishing mechanism is less loose by the screw feeding means. The slide can be moved little by little in a highly accurate state. That is, since the rotary polishing tool can be accurately fed and moved at a constant feed speed without touching, a spindle hole polishing apparatus capable of performing the polishing process of the spindle taper hole with excellent finishing accuracy can be provided.

  According to the configuration of the fifth aspect, the screw shaft is rotated by rotating the operation handle by finger operation, and the top member, that is, the carriage, screwed to the screw shaft can be slid. That is, the moving mechanism is configured as a manually operated type that does not have a reduction in driving of an electric motor or the like, and can have a simple structure and low cost while obtaining a necessary function of moving the rotary polishing tool.

  According to the configuration of the sixth aspect, the frame for supporting the polishing mechanism is formed in a substantially box-like shape including four surfaces of the bottom plate, the left and right side plates, and the back plate. It can be made strong and rigid while guarding from the rear and rear, and a large hole for operation for manually rotating the operation handle is formed in the back plate. It can be made rational, that is, the sliding movement of the rotary polishing tool can be performed without hindrance while the spindle hole polishing apparatus is made compact.

  Hereinafter, embodiments of a spindle hole polishing apparatus according to the present invention will be described with reference to the drawings. 1 is an overall side view of the spindle hole polishing apparatus, FIG. 2 is an arrow A view of the spindle hole polishing apparatus in FIG. 1, FIG. 3 is a side view showing the structure of a drive polishing mechanism, and FIG. FIG. 5 is a side view showing the main part of the polishing mechanism equipped with different types of polishing tools, and FIG. 7 is a normal work by a lathe. FIG. 8 is a schematic overall view showing a state in which a lathe is equipped with a spindle hole polishing apparatus.

  As shown in FIGS. 1 and 2, the spindle hole polishing apparatus 1 can be tilted at a frame 2 having an equal structure that can be installed on a machine tool (not shown), and a first fulcrum P that faces left and right. The carriage 3 is supported by the carriage 3, the carriage 4 is supported by the carriage 3 so as to be slidable back and forth, and the drive polishing mechanism 5 is attached and fixed to the upper surface of the carriage 4.

  The underframe 2 includes a bottom plate 2a having a rod-like mounting tool (an example of a locking mechanism) 6, a back plate 2b in which a large hole 7 for operation is formed, and sandwiching the bottom plate 2a and the back plate 2b from the left and right. It consists of substantially triangular left and right side plates 2c, 2d that are bolted together. The left and right side plates 2c and 2d are formed with bearing holes 8 for rotatably fitting the protruding shaft portions 3a formed on the left and right of the leg portion 3A of the cradle 3. The bar-shaped mounting tool 6 includes a bar-shaped main body 6A that is erected and fixed to the bottom plate 2a, and a pin member (an example of a mounting tool) 6B that is screwed on the top surface of the bar-shaped main body 6A so as to be movable up and down by operation of a nut 6n. It is composed of Note that hooks 29 (see FIG. 2) for strapping are fixed to the outside of the left and right side plates 2c, 2d.

  The cradle 3 includes a base 3B that fits and supports the carriage 4 so as to be slidable back and forth, a leg 3A positioned on the lower surface side of the base 3B, left and right protruding shafts 3a of the leg 3A, and manual movement And a mechanism 9. The base 3 </ b> B is pivotally supported by the left and right side plates 2 c and 2 d by the first fulcrum P, and is supported by the frame 2 by a substantially three-point support structure in which the front end is received and supported by the rod-like mounting tool 6. Therefore, by adjusting the height position of the pin member 6B, the rising angle of the tip of the cradle 3 can be increased or decreased.

  A manual movement mechanism (an example of a movement mechanism) 9 includes a screw shaft 10 that is rotatably mounted on the rear portion of the base 3B using a bearing member 12 that is attached to the back surface of the base 3B and that cannot be moved back and forth. An operation handle 11 attached to the rearward protruding shaft portion 10b of the screw shaft 10 and a top member 14 screwed to the screw shaft 10 through a long hole 13 formed in the front and rear of the upper portion of the screw shaft 10 of the base 3B. It is configured.

  The top member 14 is embedded in the rear portion of the carriage 4 that supports the drive polishing mechanism 5 in a vertically penetrating manner, and the lower portion thereof is screwed to the screw portion 10a of the screw shaft 10 with a predetermined length in the circumferential direction. It has a meshing portion 14b for meshing (meshing). The top member 14 is mounted on the carriage 4 with a lid 15 and a bolt 16. That is, if the handle 11 is turned by finger operation from the large operating hole 7 and the screw shaft 10 is rotated, the piece member 14 screwed to the shaft 10 moves in the axial direction, that is, the front-rear direction. The carriage 4 can be slid in the forward and reverse directions in the direction of the arrow A (substantially front-rear direction) that is the axial direction of the screw shaft 10.

  The carriage 4 includes a lower base portion 4A that is slidably fitted to and supported by the base 3B, and an upper support portion 4B that is located above the top base portion 4B. The top member 14 includes the movable base portion 4A and the support base portion. It is equipped in a state of penetrating both 4B and 4B. The carriage 4 is the position where the state shown in FIG. 1 is most retracted with respect to the cradle 3, and can be slid to the protruding position shown by the imaginary line by the layer of the operation handle 11.

  The drive polishing mechanism 5 includes a motor unit 17, a support frame unit 18, a transmission unit 19, and a bearing unit 20 that supports the polishing tool 21. The support frame portion 18 is bolted and mounted on the upper support portion 4B, and is a reverse L-shaped member in a side view that also serves as a part of the transmission portion. The drive polishing mechanism 5 is fixedly supported on the carriage 4. ing. The polishing tool 21 includes a support cylinder 22 that is detachably inserted and supported by the bearing portion 20, and a grindstone (an example of a rotary polishing tool) 23 that is rotatably supported by the support cylinder 22. That is, if the motor unit 17 is driven and rotated, the rotational speed can be increased by the transmission unit 19 and the grindstone 23 can be rotated at high speed.

  The drive polishing mechanism 5 will be described in detail. As shown in FIGS. 3 and 4, the transmission unit 19 and the support frame unit 18 increase the rotational speed of the motor shaft 17 a of the motor unit 17 and transmit it to the output shaft 20 </ b> A of the bearing unit 20. Built in. That is, the two-stage gear is engaged between the large pinion gear 25 fitted to the motor shaft 17a and the small gear 26a of the intermediate shaft 26, and the large gear 26b of the intermediate shaft 26 and the small gear 20a of the output shaft 20A. It has a speed increasing structure. The intermediate shaft 26 is rotatably supported across the support frame portion 18 and the transmission portion 19.

  The support cylinder 22 of the polishing tool 21 includes a rotary shaft 27 that fits the shaft portion 23a of the grindstone 23 in an integrally rotated state, and a base end portion of the rotary shaft 27 and a tip end of the output shaft 20A of the bearing portion 20. These parts are connected to each other by a joint portion 28 by concave-convex engagement in a state of integral rotation. Further, the base end portion of the support tube 22 is formed to be freely fitted in the tip end portion of the bearing portion 20, and the output shaft 20 </ b> A and the rotary shaft 27 are interlocked with each other when the support tube 22 is inserted into the bearing portion 20. Connected.

  Next, mounting and polishing on the lathe of the spindle hole polishing apparatus 1 will be described. First, a general lathe will be briefly described with reference to FIG. The lathe S includes a bed 41 constituting a lathe body, a drive unit 42 provided at one end thereof, a main shaft 43 supported by the drive unit 42 via a bearing 50, and the other end of the bed 41. It comprises a tailstock 44 which is provided at the center so as to be movable in the axial direction of the main shaft 43, a tailstock center 45 held by the tailstock 44, and the like. A chuck 47 is attached to the main shaft 43 by using a tapered hole 46 (described later) formed at the end thereof, and one shaft end g1 is gripped and fixed to a claw 48 of the chuck 47, and a center is provided. A workpiece (object to be processed) G having the other shaft end g2 supported by the pressing center 45 is provided. The driven workpiece G is ground by a cutting tool (bite) 49 indicated by an imaginary line, for example.

  In order to attach the spindle hole polishing apparatus 1 to the lathe S, it is performed as follows. That is, as shown in FIG. 8, after removing the chuck 47 from the main shaft 43 and exposing the end portion of the main shaft 43 and the tapered hole 46, the main shaft hole polishing apparatus 1 is mounted on the bed 41 near the main shaft 43. Put. Then, the frame 20 is arranged so that the rotational axis X of the bearing portion 20, that is, the grinding tool 21 (grinding stone 23) and the axial center Z of the main shaft 43 coincide with each other in a plan view and at a predetermined height position. After the position of 2 is adjusted, the underframe 2 is fixed on the bed 41 using a bolt or the like. Next, the height of the rod-shaped mounting tool 6 is adjusted, and fine adjustment is performed so that the inclination angle θ (see FIG. 1) formed with the horizontal line H of the rotation axis X matches the inclination angle of the tapered hole 46 of the main shaft 43.

  When the setting operation of the spindle hole polishing apparatus 1 is completed, the lathe S is activated to rotate the spindle 43 at a predetermined rotational speed, and then the handle 11 is manually rotated. As shown in FIG. That is, the grinding mechanism 5 is slid in the protruding direction, and a regrinding process is performed in which the inner peripheral surface of the taper hole 46 is polished four times from the opening side to the inner back side. For the sake of convenience, in FIG. 5, the horizontal line H parallel to the axis Z of the main shaft 43 is inclined, and the rotation axis X of the bearing portion 20 that is originally inclined is drawn in a horizontal state. When the regrinding process is completed, the lathe S is stopped, the spindle hole polishing apparatus 1 is moved away from the bed 41, and the removed chuck 47 is assembled to the spindle 43.

  For example, a height adjusting mechanism is provided that enables the height of the driving polishing mechanism 5 to be adjusted with respect to the lathe S by supporting the support frame portion 18 so as to be adjustable in the vertical direction with respect to the carriage 4. The fine adjustment of the height position with respect to the main shaft 43 and the adjustment of the polishing allowance (polishing amount) may be simple and convenient. In addition, a turning adjustment mechanism that supports the support frame 18 so as to be turnable with respect to the carriage 4 is provided so that the position adjusting operation of the grindstone 23 with respect to the tapered hole 46 can be simplified and improved in accuracy. It may be configured. Further, a mechanism for driving and sliding the reciprocating movement of the carriage 4 may be added to the screw shaft 10 using an electric motor or the like.

  For reference, FIG. 6 shows a case where the polishing tool 21 is replaced with another one. The polishing tool 21 ′ is different from the grindstone 23 shown in FIG. 3 in the diameter and width of the grindstone 23 ′, and the diameter and shape of the support cylinder 22 ′ are different from those in the support cylinder 22 shown in FIG. The structure for insertion into 20 and the structure of the joint portion 28 are the same.

  In the present embodiment, the screw shaft n and the piece member 14 constitute the screw feeding means n, and the projecting shaft portion 3a and the bearing hole 8 are fitted to the horizontal axis P so as to be rotatable relative to each other. The posture adjusting mechanism B is constituted by the fixture 6. The moving mechanism 9 may be configured as a driving type having a driving source such as an electric motor, and the posture adjusting mechanism may be configured as a driving type.

  As described above, the spindle hole polishing apparatus 1 according to the present invention has a polishing mechanism having the base frame 2 that can be installed on the machine tool S and the rotary polishing tool 23 that can polish the tapered hole 46 of the spindle 43 of the machine tool S. 5, a posture adjusting mechanism B capable of variably setting the posture of the rotary polishing tool 23 with respect to the frame 2, and the rotary polishing tool 23 in a state in which the posture with respect to the frame 2 is determined by the posture adjusting mechanism B. And a moving mechanism 9 movable in the direction. As a result, the polishing mechanism 5 is mounted on the underframe 2 via the attitude adjustment mechanism B and the moving mechanism 9 to provide the spindle hole polishing apparatus 1, so that the spindle hole polishing apparatus 1 can be carried and installed on the machine tool S. That is, the main shaft 43 can be carried by the main shaft hole polishing apparatus 1 while being assembled to the machine tool S, and the taper hole 46 can be polished. That is, since the spindle hole polishing apparatus 1 can be brought to the machine tool S, the troublesome and time-consuming work of disassembling and assembling the spindle 43 from the machine tool S when re-polishing the tapered hole 46 is performed. It becomes unnecessary and is eliminated, and the taper hole of the spindle can be re-polished easily and conveniently.

Overall side view of spindle hole polishing equipment FIG. 1 is a view of the spindle hole polishing apparatus of FIG. Side view with partial cutaway showing the structure of the polishing mechanism Side view of the main part showing the structure of the gear speed increasing mechanism Action diagram showing the grinding condition of the spindle taper hole Side view showing the main part of the polishing mechanism with different types of polishing tools Overall view showing normal working condition with lathe Schematic overall view showing the state that the lathe is equipped with a spindle hole polishing device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main shaft hole grinding | polishing apparatus 2 Base frame 2a Bottom plate 2b Back plate 2c, 2d Side plate 3 Base 4 Reciprocating base 5 Polishing mechanism 6 Locking mechanism 6B Mounting tool 7 Large hole for operation 9 Moving mechanism 10 Screw shaft 11 Operation handle 23 Rotation Polishing tool 43 Spindle 46 Tapered hole n Screw feed means B Attitude adjustment mechanism P Horizontal axis X Rotational polishing tool rotational axis θ Angle of rotational polishing tool rotational axis to horizontal plane

Claims (6)

  A base frame that can be installed on a machine tool, a polishing mechanism having a rotary polishing tool capable of polishing a taper hole of a spindle of the machine tool, and an attitude adjustment mechanism capable of variably setting the attitude of the rotary polishing tool with respect to the base frame; A spindle hole polishing apparatus comprising: a moving mechanism that can move the rotary polishing tool in a state in which the attitude with respect to the underframe is determined by the attitude adjusting mechanism in a direction of a rotation axis thereof.   The posture adjusting mechanism is provided with a locking mechanism that supports the polishing mechanism so as to be rotatable about a horizontal axis with respect to the frame and prevents the polishing mechanism from rotating relative to the frame. 2. The spindle hole polishing apparatus according to claim 1, wherein an angle of the rotation axis with respect to a horizontal plane is adjustable.   The locking mechanism is configured to include a mounting tool that receives the rotation and swinging of the rotary polishing tool about the horizontal axis and is adjustable in height with respect to the frame. The spindle hole polishing apparatus as described.   The moving mechanism includes a pedestal supported by the frame via the attitude adjusting mechanism, a reciprocating table that supports the polishing mechanism and is slidably supported with respect to the pedestal, and the reciprocating table The spindle hole polishing apparatus according to any one of claims 1 to 3, wherein the spindle hole polishing apparatus comprises:   The screw feeding means comprises a screw shaft that is rotatably supported by the cradle and is not movable in the axial direction, and a top member that is mounted on the carriage in a state of being screwed to the screw shaft. The spindle hole polishing apparatus according to claim 4, further comprising an operation handle for manually rotating the screw shaft. The underframe includes a bottom plate for mounting and mounting on a machine tool, left and right side plates rising from left and right ends of the bottom plate to support the polishing mechanism via a posture adjusting mechanism, and rear ends of these side plates. And a large box for operation for manually rotating the operation handle from the outside is formed in the back plate. Item 6. The spindle hole polishing apparatus according to Item 5.

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