JP4206880B2 - Rotating shaft headstock module device and rotating shaft headstock - Google Patents

Description

  The present invention relates to a rotary shaft headstock module device and a rotary shaft headstock.

The headstock for rotating and supporting the workpiece in a grinding machine or lathe has specifications that the center that supports the workpiece does not move in the axial direction of the spindle, and specifications that the center moves in the axial direction of the spindle. There is. For example, as a head stock having a specification in which the center moves in the axial direction of the main shaft, there is one disclosed in Japanese Patent Laid-Open No. 2003-205403. The headstock disclosed in the publication has a ram that slides in the axial direction.
JP 2003-205403 A

  By the way, the headstock having specifications in which the center slides in the axial direction and the headstock having specifications in which the center is fixed in the axial direction are independent from each other. Therefore, when each specification is changed, it is necessary to change the headstock itself, which is not easy.

  The present invention has been made in view of such circumstances, and a specification in which the center is fixed in the axial direction and the center slide in the axial direction so that the respective specifications can be easily changed. It is an object of the present invention to provide a rotating shaft headstock module device and a rotating shaft headstock that are capable of exchanging only specific components with specifications.

According to a first aspect of the present invention, there is provided a spindle base module device which is fixed on a bed or a table of a machine tool and has a spindle base body formed with a spindle hole in an axial direction, and relative to the spindle base body about the axis. and rotatably said is pivotally supported on the pivot hole spindle spindle in the axial direction ram pivotally holes formed in slidably the ram for pivotal hole in the axial direction of the pivoted front end side with respect to the main shaft A ram having a center for positioning the shaft center of the workpiece; and a spindle rotation driving means for rotating the spindle, wherein the spindle base body has one end side of a fixing bracket for fixing the sliding of the ram ; A headstock main body engaging portion that is interchangeably engaged with a support portion of a ram driving means that enables the sliding of the ram, and the ram includes the other end side of the fixing bracket and the ram driving portion. replaceably engage and drive unit means Characterized in that it has a beam engaging portion.

According to a second aspect of the present invention, there is provided a rotating shaft headstock module device comprising: a main shaft base body fixed on a bed or table of a machine tool and having a ram pivot hole formed in an axial direction; and rotatably to the ram for pivotal hole is pivotally supported on the main shaft for pivoting hole in the axial direction is formed ram tip is pivotally supported to be rotatable relative to the main shaft pivot hole around the axis side with respect to the ram a center of wearable spindle for supporting the follower over click, and a spindle rotation drive means for rotating said spindle, said headstock body, and one end of the fixing bracket for fixing the sliding of the ram A headstock main body engaging portion that is interchangeably engaged with a support portion of a ram driving means that enables the sliding of the ram, and the ram includes the other end side of the fixing bracket and the ram driving portion. the ram engagement portion which interchangeably engaged with the driving portion of the device Characterized in that it.

  According to a third aspect of the present invention, the ram engaging base module device is characterized in that the ram engaging portion is disposed on the rear end side of the ram.

  According to a fourth aspect of the present invention, there is provided a rotating shaft headstock module device which is used for a headstock of a grinding machine for grinding a workpiece.

The rotating shaft headstock according to claim 5 is a main shaft base body fixed on a bed or table of a machine tool and having a main shaft pivot hole formed in an axial direction, and is rotatable relative to the main shaft base body about an axis. the workpiece wherein a spindle ram pivot hole is formed in the pivoted axially on a pivot hole spindle, to slidably the ram for pivotal hole in the axial direction of the pivoted front end side with respect to the main shaft A ram having a center for positioning the shaft center, a spindle rotation driving means for rotating the spindle, one end side being fixed to the headstock main body and the other end side being fixed to the ram, and the sliding of the ram. A fixing bracket for fixing, and a ram driving means that includes a support portion supported by the headstock body and a driving portion attached to the ram, and enables the ram to slide, and the fixing bracket; the ram drive means, the main shaft Characterized in that the replaceable with respect to the body and the ram.

The rotary shaft headstock according to claim 6 is slidable in the axial direction with respect to the headstock body fixed on the bed or table of the machine tool and having a pivot hole for the ram formed in the axial direction. word over said a ram pivot hole is pivotally supported on the main shaft for pivoting hole in the axial direction is formed ram, the relatively rotatable main shaft for pivoting hole around the axis in the pivoted distally relative to the ram to A spindle capable of mounting a center for supporting a shaft, spindle rotation driving means for rotating the spindle, and one end side fixed to the spindle base body and the other end side fixed to the ram so that the ram slides. A fixing bracket for fixing, and a ram driving means that includes a support portion supported by the headstock body and a driving portion attached to the ram, and enables the ram to slide, and the fixing bracket; the ram drive means, the headstock body and before And characterized in that a replaceable relative to the ram.

  According to the rotating shaft head stock module device according to claim 1 and claim 2, it is possible to easily adopt a configuration in which the ram can be easily fixed by the fixing bracket, and the ram driving means to easily make the ram. It is also possible to easily adopt a sliding configuration. In other words, according to the present invention, it is possible to easily change the headstock having a specification in which the center is fixed in the axial direction and the headstock having a specification in which the center slides in the axial direction. That is, it can be achieved by replacing only the fixing bracket or the ram driving means. In addition, since the rotary shaft spindle module device that does not need to be replaced when changing the specifications can be shared, the number of parts as a whole can be reduced. As a result, the manufacturing cost can be reduced. In addition, the common use of the rotating shaft headstock module device leads to an improvement in the reliability of the head stock.

  In addition, the rotating shaft head stock module device according to the first aspect has a configuration in which a ram is disposed on the inner side of the main shaft. That is, the center does not rotate with the main shaft. That is, it is possible to provide a rotating shaft spindle module device in which the fixing bracket and the ram driving means can be replaced with respect to the rotating shaft spindle having a configuration in which the center does not rotate.

  Moreover, the rotating shaft head stock module device according to claim 2 has a configuration in which the main shaft is disposed on the inner side of the ram. That is, a configuration is adopted in which the center rotates together with the main shaft. In other words, it is possible to provide a rotating shaft spindle module device in which the fixing bracket and the ram driving means can be replaced with respect to the rotating shaft spindle having a configuration in which the center rotates.

  According to the rotary shaft head stock module device of the third aspect, the ram engaging portion can be easily formed. That is, the rotating shaft head stock module device of the present invention can be formed with an easy configuration.

  According to the rotating shaft head stock module device according to claim 4, since it can be used for a grinding machine that has a specification in which the center is fixed in the axial direction and a specification in which the center slides in the axial direction, in many cases, The said effect can be exhibited more.

  According to the rotating shaft head stock according to the fifth and sixth aspects, the same effect as the above-described rotating shaft head stock module device is obtained. In other words, the rotary shaft headstock of the present invention has interchangeable fixing brackets and ram driving means, so that the specification that the center is easily fixed in the axial direction and the specification that the center slides in the axial direction are provided. Can be changed.

  Next, embodiments will be described, and the present invention will be described in more detail with reference to the drawings, taking as an example the case where the present invention is applied to a rotating shaft head stock of a grinding machine. FIG. 1 is a configuration diagram showing a grinding machine. As shown in FIG. 1, the grinding machine includes a bed 1, a table 2, a rotary shaft headstock (hereinafter simply referred to as “main shaft base”) 3, a tailstock 4, a grinding wheel base 5, and a grinding wheel G. It consists of.

  The bed 1 is a foundation of a grinding machine, and is fixed to a place where the grinding machine is installed. The bed 1 has an X-axis guide rail (not shown) extending in the X-axis direction and a Z-axis guide rail (not shown) extending in the Z-axis direction. Further, an X-axis motor and a Z-axis motor are fixed to the bed 1. The bed 1 is rotatably supported by an X-axis ball screw disposed in parallel to the X-axis guide rail and having one end connected to an X-axis motor. The bed 1 is rotatably supported by a Z-axis ball screw disposed in parallel to the Z-axis guide rail and having one end connected to a Z-axis motor.

  The table 2 is disposed on the front side on the bed 1. Specifically, it is slidably disposed on the Z-axis guide rail of the bed 1. Furthermore, the table 2 has a ball screw nut on the lower side. This ball screw nut is connected to a Z-axis ball screw attached to the bed 1. Therefore, the table 2 slides in the Z-axis direction with respect to the bed 1 by rotating the Z-axis ball screw.

  The headstock 3 is disposed on the left end side of the table 2 and has a main shaft 32 (shown in FIG. 2) that can rotate about the Z axis. Further, a chuck 6 capable of gripping the workpiece W is disposed on the right end side of the head stock 3. A spindle center 35 for supporting the one end side of the workpiece W and for positioning the axis of the workpiece W is provided at the center of the shaft on the right end side of the spindle stock 3. The detailed configuration will be described later.

  The tailstock 4 is arranged at a position facing the headstock 3 on the right end side of the table 2. The tailstock 4 has a tailstock shaft that can rotate about the Z axis concentrically with the main shaft 32 inside. A tailstock center 41 that supports the other end side of the workpiece W is provided at the center of the shaft on the left end side of the tailstock 4.

  The grinding wheel platform 5 is disposed on the rear side on the bed 1. Specifically, it is slidably disposed on the X-axis guide rail of the bed 1. The grinding wheel base 5 has a ball screw nut on the lower side. This ball screw nut is connected to an X-axis ball screw attached to the bed 1. Therefore, by rotating the X-axis ball screw, the grinding wheel base 5 slides in the X-axis direction with respect to the bed 1. Furthermore, the grinding wheel base 5 has a grinding wheel G that can rotate around the Z axis.

  Next, the head stock 3 will be described in detail with reference to FIGS. FIG. 2 shows a configuration of a spindle head 3 having specifications in which the spindle center 35 is fixed in the axial direction (hereinafter referred to as “fixed specification spindle head”) 3. FIG. 3 shows a configuration of a head stock 3 having a specification in which the main shaft center 35 slides in the axial direction (hereinafter referred to as a “sliding specification head stock”) 3.

  First, with reference to FIG. 2, a description will be given of a spindle head 3 having a specification in which the spindle center 35 is fixed in the axial direction (hereinafter referred to as a “fixed specification spindle head”). As shown in FIG. 2, the fixed-type spindle stock 3 includes a spindle stock main body 31, a spindle 32, a spindle rotating motor 33, a ram 34, a spindle center 35, and a fixing bracket 36. . Here, the head stock body 31, the main shaft 32, the main shaft rotating motor 33, and the ram 34 constitute the head stock module device of the present invention.

  The headstock body 31 is the outer shape of the headstock 3 of fixed specification, and is positioned and fixed on the table 2 with bolts or the like. The headstock body 31 is formed with a first round hole 311 (main shaft pivot hole) and a second round hole 312 (main shaft pivot hole) centering on an axis parallel to the Z-axis direction. The first round hole 311 is formed on the right end side of the headstock body 31, and the second round hole 312 is formed in the approximate center of the headstock body 31. The first round hole 311 is formed with a larger diameter than the second round hole 312. The first round hole 311 and the second round hole 312 are concentrically formed so as to pivotally support a main shaft 32 described later.

  Further, a motor mounting seat 313 is formed above the central axis of the first round hole 311 and the second round hole 312 in the head stock body 31. A third round hole 314 is formed on the right inner side of the motor mounting seat 313 and above the first round hole 311 and the second round hole 312. The motor mounting seat 313 is a pedestal for mounting a spindle rotating motor 33 described later. The output shaft 331 of the spindle rotating motor 33 is pivotally supported in the third round hole 314. Furthermore, a bracket mounting seat 315 for mounting a fixing bracket 36 to be described later is formed on the horizontal surface below the left end of the head stock body 31. The bracket mounting seat 315 has a plurality of mounting holes (headstock engaging portions) 316 formed in the vertical direction.

  The main shaft 32 is formed in a substantially cylindrical shape with a through-hole (ram pivot hole) formed in the center, and includes a main shaft fixing portion 321, a main shaft rotating portion 322, and a bearing 323. The main shaft fixing portion 321 has a substantially cylindrical shape. The outer peripheral left side of the spindle fixing portion 321 is fitted and fixed in the second round hole 312 of the spindle head body 31. Further, the inner peripheral surface of the main shaft fixing portion 321 is formed to pivotally support a ram 34 described later. The main shaft rotating part 322 has a substantially cylindrical shape. The main spindle rotating part 322 is rotatably arranged on the right side of the outer periphery of the main spindle fixing part 321 via a bearing 323. Further, the right outer periphery of the spindle rotating part 322 is loosely fitted in the first round hole 311 of the spindle head body 31. That is, the spindle rotating part 322 is rotatable with respect to the spindle head body 31 and the spindle fixing part 321. Further, a gear 324 is formed on the outermost peripheral side of the main spindle rotating portion 322. A chuck 6 (shown in FIG. 1) for gripping the workpiece W is mounted on the right end surface of the spindle rotating portion 322.

  The spindle rotation motor (spindle rotation driving means) 33 is fixedly attached to the motor mounting seat 313 of the spindle base body 31 so that the output shaft 331 extends to the right side. The output shaft 331 of the spindle rotating motor 33 is pivotally supported by the third round hole 314 of the headstock body 31 via a bearing. Further, a gear 332 that is screwed into the gear 324 of the main shaft rotating portion 322 is formed on the outer peripheral side of the front end of the output shaft 331 of the main shaft rotating motor 33. That is, the rotation of the main shaft rotating motor 33 is transmitted to the main shaft rotating unit 322 via the gear 332 of the output shaft 331 and the gear 324 of the main shaft rotating unit 322.

  The ram 34 has a substantially cylindrical shape. Specifically, the outer peripheral surface of the ram 34 is formed to have substantially the same diameter, the inner right side of the ram 34 is formed in a tapered shape whose diameter increases toward the right side, and the inner left side of the ram 34 is substantially the same. It is formed in the same diameter hole. The outer peripheral surface of the ram 34 is loosely engaged with the inner peripheral surface of the main shaft fixing portion 321 and is slidable in the axial direction with respect to the main shaft fixing portion 321. Further, a mounting hole 341 for mounting the fixing bracket 36 is formed on the left end surface of the ram 34 in the horizontal direction.

  The spindle center 35 includes a pointed portion 351 for positioning the center of the workpiece W and a tapered portion 352 that fits into a tapered portion on the inner right side of the ram 34. The spindle center 35 has a tapered portion 352 fitted to the ram 34 so that the pointed portion 351 protrudes to the right side from the right end surface of the ram 34. The spindle center 35 can be exchanged and attached according to the workpiece W.

  The fixing bracket 36 is substantially L-shaped. The horizontal surface of the fixing bracket 36 abuts on the bracket mounting seat 315 of the headstock body 31 and is fixed to the mounting hole 316 of the bracket mounting seat 315 with a bolt. The vertical surface of the fixing bracket 36 is in contact with the left end surface of the ram 34 and is fixed to a mounting hole 341 formed in the ram 34 with a bolt. That is, the headstock body 31 and the ram 34 are fixed by the fixing bracket 36. Here, the fixing bracket 36 is attached to and removed from the headstock body 31 and the ram 34 on the left end side of the headstock 3 which is very easy.

  Next, the operation of the above-described fixed specification head stock 3 will be described. First, when the main shaft rotating motor 33 rotates, the output shaft 331 of the main shaft rotating motor 33 rotates. Subsequently, when the output shaft 331 rotates, the main shaft rotating portion 322 that is screwed into the gear 332 formed on the output shaft 331 rotates. Subsequently, when the main spindle rotating unit 322 rotates, the chuck 6 attached to the left end surface of the main spindle rotating unit 322 rotates. Subsequently, when the chuck 6 rotates, the workpiece W held by the chuck 6 rotates.

  At this time, since the ram 34 is fixed to the headstock body 31 via the fixing bracket 36, it does not move or rotate in the axial direction.

  Next, with reference to FIG. 3, a description will be given of a spindle stock 3 having specifications in which the spindle center 35 slides in the axial direction (hereinafter referred to as “sliding specification spindle stock”). As shown in FIG. 3, the spindle head 3 of the sliding specification includes a headstock body 31, a main shaft 32, a main shaft rotating motor 33, a ram 34, a main shaft center 35, and a ram driving device 37. The Here, the head stock body 31, the main shaft 32, the main shaft rotating motor 33, and the ram 34 constitute a head stock module device. The head stock module device of the head stock 3 with the sliding specification and the head stock module device of the head stock 3 with the fixed specification described above are shared. That is, the fixed-type spindle stock 3 shown in FIG. 2 is different from the sliding-type spindle stock 3 shown in FIG. 3 only in the fixing bracket 36 and the ram driving device 37. Therefore, only the ram drive device 37 will be described below.

  As shown in FIG. 3, the ram driving device (ram driving means) 37 includes a support portion 371, a ram driving motor 372, a ram driving ball screw 373, a ram driving ball screw nut 374, and a ram driving bracket. 375.

  The support portion 371 has a bottom surface that is substantially horizontal, and a through hole formed in the center. The lower surface of the support portion 371 contacts the bracket mounting seat 315 of the headstock body 31 and is fixed to a mounting hole 316 formed in the bracket mounting seat 315 with a bolt. That is, the support portion 371 is fixed to the head stock body 31.

  The ram drive motor 372 is attached and fixed to the left end surface of the support portion 371 so that the output shaft extends to the right side. One end of the ram driving ball screw 373 is connected to the output shaft of the ram driving motor 372 so as to extend in a direction parallel to the axial direction of the main shaft 32, and the other end is in contact with the headstock main body 31. The ram driving ball screw 373 is pivotally supported by a through hole of the support portion 371 via a bearing. The ram driving ball screw nut 374 is screwed into the ram driving ball screw 373, and the ram driving ball screw nut 374 moves in the axial direction when the ram driving ball screw 373 rotates. The ram driving bracket 375 is fitted and fixed to the outer peripheral side of the ram driving ball screw nut 374. One end side of the ram driving bracket 375 comes into contact with the left end surface of the ram 34 and is fixed to a mounting hole of the ram 34 with a bolt. That is, the ram driving ball screw nut 374 and the ram 34 are fixed via the ram driving bracket 375.

  Next, the operation of the slide head stock 3 will be described. First, when the main shaft rotating motor 33 rotates, the output shaft 331 of the main shaft rotating motor 33 rotates. Subsequently, when the output shaft 331 rotates, the main shaft rotating portion 322 that is screwed into the gear 332 formed on the output shaft 331 rotates. Subsequently, when the main spindle rotating unit 322 rotates, the chuck 6 attached to the left end surface of the main spindle rotating unit 322 rotates. Subsequently, when the chuck 6 rotates, the workpiece W held by the chuck 6 rotates.

  On the other hand, when the ram driving motor 372 rotates, the ram driving ball screw 373 rotates. Subsequently, when the ram driving ball screw 373 rotates, the ram driving ball screw nut 374 screwed into the ram driving ball screw 373 moves in the axial direction. Subsequently, when the ram driving ball screw nut 374 moves in the axial direction, the ram 34 slides in the axial direction with respect to the main shaft fixing portion 321 via the ram driving bracket 375.

  As described above, the headstock module device is configured such that the fixing bracket 36 and the ram driving device 37 can be replaced, thereby easily providing the fixed-type mainstock 3 and the sliding-type mainstock 3. Can be changed. Further, since the headstock module device is commonly used for the fixed-type main headstock 3 and the sliding-type main headstock 3, it is possible to reduce the total number of parts. As a result, the manufacturing cost can be greatly reduced. Furthermore, the reliability as the head stock 3 can be improved by making it common as the head stock module device.

  In the above embodiment, the ram 34 is disposed inside the main shaft 32 so that the ram 34 does not rotate. However, the present invention is not limited to this. For example, a configuration in which the ram has a built-in spindle may be used, such as a spindle stock disclosed in Japanese Patent Laid-Open No. 2003-205403. In this case, the spindle center rotates together with the spindle.

It is a figure which shows the whole structure of the grinding machine in this embodiment. It is a figure which shows the headstock of the fixed specification of this embodiment. It is a figure which shows the headstock of the sliding specification of this embodiment.

Explanation of symbols

1: bed, 2: table, 3: spindle head, 4: tailstock, 5: grinding wheel base, 6: chuck, 31: spindle head body, 32: spindle, 33: spindle rotation motor (spindle rotation drive means) 34: Ram, 35: Spindle center, 36: Bracket for fixing, 37: Ram drive device (ram drive means), 311: First round hole (spindle for spindle), 312: Second round hole (spindle for spindle) Holes), 313: motor mounting seat, 314: third round hole, 315: bracket mounting seat, 316: mounting hole (headstock engaging portion), 321: main shaft fixing portion, 322: main shaft rotating portion, 323: bearing, 324: Gear, 331: Output shaft, 332: Gear, 341: Mounting hole (ram engaging portion), 351: Pointed portion, 352: Tapered portion, 371: Support portion, 372: Ram drive motor, 373: For ram drive ball Flip, 374: ram driving the ball screw nut, 375: ram drive bracket, 41: tailstock center, G: grinding wheel

Claims (6)

A headstock body fixed on a bed or table of a machine tool and having a spindle hole in the axial direction;
A main shaft ram pivot hole is formed around the axis in relatively rotatable said is pivotally supported on the pivot hole spindle axially relative to the headstock body,
A ram having a center which is pivotally supported by the ram pivot hole so as to be slidable in the axial direction with respect to the main shaft and which positions the center of the shaft of the workpiece on the tip side;
A main shaft rotation driving means for rotating the main shaft;
The headstock body is engaged with a headstock body that is interchangeably engaged with one end side of a fixing bracket that fixes the sliding of the ram and a support portion of a ram driving means that enables the sliding of the ram. Have joints,
The ram has a ram engaging portion that is interchangeably engaged with the other end side of the fixing bracket and a driving portion of the ram driving means. A headstock body fixed on a machine tool bed or table and having a ram pivot hole formed in the axial direction;
A ram that is pivotally supported by the pivot hole for the ram so as to be slidable in the axial direction relative to the main body of the headstock, and a pivot hole for the spindle is formed in the axial direction;
And the main shaft can be mounted a center supporting a word over click to the tip is pivotally supported around an axis on the pivot hole for relatively rotatably the spindle side with respect to the ram,
A main shaft rotation driving means for rotating the main shaft;
The headstock body is engaged with a headstock body that is interchangeably engaged with one end side of a fixing bracket that fixes the sliding of the ram and a support portion of a ram driving means that enables the sliding of the ram. Have joints,
The ram has a ram engaging portion that is interchangeably engaged with the other end side of the fixing bracket and a driving portion of the ram driving means.   The rotary shaft head stock module device according to claim 1, wherein the ram engaging portion is disposed on a rear end side of the ram.   The said rotating shaft head stock module apparatus is used for the head stock of the grinder which grinds a workpiece | work, The rotating shaft head stock module apparatus in any one of Claims 1-3 characterized by the above-mentioned. A headstock body fixed on a bed or table of a machine tool and having a spindle hole in the axial direction;
A main shaft ram pivot hole is formed around the axis in relatively rotatable said is pivotally supported on the pivot hole spindle axially relative to the headstock body,
A ram having a center which is pivotally supported by the ram pivot hole so as to be slidable in the axial direction with respect to the main shaft and which positions the center of the shaft of the workpiece on the tip side;
A spindle rotation driving means for rotating the spindle;
A fixing bracket for fixing one end side to the headstock body and fixing the other end side to the ram to fix the sliding of the ram;
A ram drive means comprising a support part supported by the headstock body and a drive part attached to the ram, and enabling the ram to slide;
The rotating shaft headstock characterized in that the fixing bracket and the ram driving means are replaceable with respect to the headstock body and the ram . A headstock body fixed on a machine tool bed or table and having a ram pivot hole formed in the axial direction;
A ram that is pivotally supported by the pivot hole for the ram so as to be slidable in the axial direction relative to the main body of the headstock, and a pivot hole for the spindle is formed in the axial direction;
And the main shaft can be mounted a center supporting a word over click to the tip is pivotally supported around an axis on the pivot hole for relatively rotatably the spindle side with respect to the ram,
A spindle rotation driving means for rotating the spindle;
A fixing bracket for fixing one end side to the headstock body and fixing the other end side to the ram to fix the sliding of the ram;
A ram drive means comprising a support part supported by the headstock body and a drive part attached to the ram, and enabling the ram to slide;
The rotating shaft headstock characterized in that the fixing bracket and the ram driving means are replaceable with respect to the headstock body and the ram .

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