KR100365892B1 - Grinding machine for grinding a shaft end - Google Patents

Abstract

The present invention relates to a grinding machine for round bar end spherical processing.

Round bar end spherical grinding machine according to the present invention, by loading a plurality of the round bar and put each one by one at a predetermined time interval, the round bar injection device, each of the round bar received from the round bar loading device at a predetermined distance interval Round bar transfer shuttle for gradually transferring the round bar through the drive of a dynamic cam, clamping device for repeating the fixing before grinding and the separation after grinding for spherical processing the round bar transferred from the round bar transfer shuttle, the other of the clamping device Located at the side, the grinding device is provided with a grinder for spherical processing the end portion of the round bar fixed by the clamping device, and the grinding rod and the round bar is completed in the grinding device to take over from the round bar transfer device It is provided with a round bar discharge device for discharging to the outside And a gong.

Therefore, the center of the round bar can be accurately fixed and fixed, and when rounding the end portion of the round bar, the roundness of the machining surface can be improved, the cumbersome cutting work can be omitted, and the surface roughness is also improved, thereby making the round bar processing in large quantities. There is an effect that can be performed.

Description

Grinding machine for grinding a shaft end

The present invention relates to a grinding machine for processing a round end of a round bar, and more particularly, to smooth the rotation of the round bar by minimizing friction that may occur when the end of the round bar comes into contact with a predetermined part. It relates to a grinding machine for spherical processing of the end portion of the round bar.

There are various types of machine tools for performing cutting, depending on the processing method, and among them, machine tools capable of performing spherical processing may be generally available by lathes or CNC lathes (Computerized numerical control lathe).

A brief introduction of the working method of spherical machining of lathes is to place a separately designed saddle on a bed, to fix a rotary table on it and a dedicated tool post on the rotary table. The rotary table is driven through a worm and a worm gear in the transfer mechanism of the lathe, or by manually driving the worm of the rotary table, spherical processing is performed by rotating a tool post together with the table. CNC lathes, of course, are computer controlled to carry out the machining.

Here, the necessity of the end spherical processing of the workpiece is required in various fields, and among them, as an example of the round bar end spherical processing, an armature rotary shaft for a power window of a motor vehicle. The armature rotation shaft is usually mounted to a steel ball by cutting the end portion thereof, but may be referred to as directly spherical end portion in order to solve the problem of the cutting process and manufacturing cost of the steel ball mounting portion.

However, there is a limit to working such a spherical machining by the lathe as described above. In general, when machining a workpiece, the centering of the tailstock should be performed first, but when the length of the workpiece is short or the end of the workpiece must be machined, The workpiece must be fixed only by the chuck. If the workpiece is fixed only by the chuck, the roundness of the machining surface cannot be expected because the exact center cannot be obtained.

In addition, the center of the shaft of the workpiece during lathe work is the part where the cutting work of the bite does not reach, and it is also a problem that lathes must follow up to improve roughness after lathe machining is finished. Can be.

Therefore, it is obvious to those skilled in the art that even a general-purpose machine tool such as a lathe has a certain limit, and it is obvious to those skilled in the art. In such a situation, there is a large amount of spherical processing of the end of the round bar without providing a separate machine tool. If it is to be made with conventional techniques alone will have to perform a complicated machining process several times.

An object of the present invention is to provide a grinding machine for round bar end spherical processing that can be accurately fixed to the center of the round bar and to improve the roundness of the processing surface when spherical end of the round bar.

Another object of the present invention is to provide a grinding machine for round bar end spherical processing that can be carried out in large quantities by processing the machining surface with a grinder to omit complicated cutting work and at the same time improve the surface roughness of the machining surface In providing.

1 is a perspective view showing a grinding machine for round bar end spherical processing according to an embodiment of the present invention.

Figure 2 is a side cross-sectional view showing a round rod injection device shown in FIG.

3 is an exploded perspective view showing a coupling state between the movable shuttle shown in Figure 1 and the components for cam driving of the movable shuttle.

4 is a view for explaining the cam drive of the movable shuttle shown in FIG.

5 is a front view illustrating the clamping apparatus shown in FIG. 1.

6 is a side view showing the clamping device shown in FIG.

7 is a schematic cross-sectional view showing the grinding apparatus shown in FIG.

※ Explanation of symbols for main parts of drawing

1: round bar 100: round bar injection device

101: hopper 102: feed roller

103: alignment roller 104: opening

105: inclined plate 106: pin

107: groove 108: roller shaft

109: pinion 110: fluid pressure cylinder

111: rack 200: round bar transfer shuttle

201: fixed shuttle 202: movable shuttle

203: home 204: driven guider

205: parallel cam groove 206: diagonal cam groove

207: Wondong guider 208: Wondo roller

209: roller pin 210: fluid pressure cylinder

211: fixed side wall 212: fixed roller

213: roller pin 214: bolt

215: nut 216: bolt clip

217: fastening plate 218: spring

219: pinhole 220: bush

300: clamping apparatus 301: guide rail

302: hydraulic cylinder 303: housing

304: plate-shaped stopper 305: caterpillar

306: alignment pusher 307: fluid pressure cylinder

308: groove 309: motor

310: driven clamping roller 311: driven clamping roller

312: spring 313: clamper

314: timing belt 315: fluid pressure cylinder

316: guide roller 317: spring

400: grinding device 401: rotary support shaft

402: rotary table 403: grinder

404: arm 405: rotating disk

406: motor 407: grinding wheel

408: motor 409: belt

410: pulley 411: bush

412: bearing 413: bed

414: pin 500: round bar discharge device

501: conveyor 502: fluid pressure cylinder

503: loading container 504: sensor

505: discharge pusher 600: control box

A: Initial state of movable shuttle

B: Upward driving state of movable shuttle

C: Forward driving state of movable shuttle

D: Lower driving state of movable shuttle

I: Initial position seated in the first groove of the fixed shuttle

F: Final position seated in the next groove of the fixed shuttle

Round bar end spherical grinding machine according to the present invention for achieving the above object is a ring rod input device for loading a plurality of the rods individually one by one at a predetermined time interval, a constant each of the round bar received from the round rod input device A round bar transfer shuttle for transferring the round bar in stages by driving a dynamic cam by loading at a distance interval, and clamping device for repeating the fixed rod before grinding and leaving after grinding for spherical processing of the round bar transferred from the round bar transfer shuttle. And a grinding device positioned on the other side of the clamping device and having a grinder for spherical processing of the distal end portion of the round bar fixed by the clamping device, and a grinding device for completing the cutting operation in the cutting device. The round bar discharge device that takes over from the round bar transport device and discharges to the outside It is characterized by comprising.

The round bar injection device is a hopper for stacking a plurality of the round bar to discharge the round bar side by side through the opening formed in the lower, seating the round bar discharged from the hopper in the groove formed on the outer periphery, by forward and reverse rotation It can be made with a transport roller for individually transporting the round bar at a predetermined time interval, and a fluid pressure cylinder coupled to the transport roller by a combination of rack and pinion to forward and reverse rotation of the transport roller.

In addition, the round bar transfer shuttle has a plurality of grooves formed to seat the round bar received from the round bar input device at a predetermined distance interval and is not driven at the home position, and is formed side by side with the fixed shuttle and the groove formed on the fixed shuttle A plurality of grooves are formed at the same distance intervals, and the round bar is driven by a dynamic cam that repeats the upward, forward, downward, and retreat from the first seated groove of the fixed shuttle to the next groove located in the process progress direction. A movable guide for moving step by step, a driven guider coupled by the movable shuttle and a fastening plate and having a parallel cam groove and an oblique cam groove for performing a reverse cam drive of the movable shuttle, fixed to be positioned at left and right sides of the driven guider, It is provided with a fixed roller and a roller pin inserted in the cam groove to the driven guider of the parallel cam groove It has a fixed side wall for guiding the movement to the shape, and the driving roller and the roller pin inserted into the slant cam groove and located inside the driven guide to guide the driven guide to move in the shape of the slant cam groove. A hydraulic guide cylinder may be provided to provide a driving force for driving the dynamic cam.

In addition, the clamping device is a guide rail for guiding the direction of movement, a housing reciprocating on the guide rail, a fluid pressure cylinder fixed to the upper portion of the guide rail and providing power to the housing reciprocating along the guide rail And an alignment pusher positioned at an unprocessed end of the round bar to push the end of the round bar to be located at the grinder. The pusher is coupled to the housing to form a groove, and is inserted into the tapered portion of the round bar when the housing descends. A plate-shaped stopper preventing excessive alignment of the alignment pusher, a driving clamping roller coupled to a motor fastened to the housing to provide power of rotational movement, and fastening to the housing to grind the round bar by a reciprocating motion of the housing. Cater which is fixed and rotated during processing and deviated after grinding Wheeler, and located at the bottom of the clamping roller and is fixed to the inner side of the fixed shuttle may be provided with a guide roller on which the round bar is a grinding process is carried out seated.

Here, the caterpillar is a driving clamping roller coupled to the motor fastened to the housing to provide the power of the rotational movement, the clamper is coupled to the housing and provided with a spring narrowed and separated by a predetermined angle, fastening to both ends of the clamper And a timing belt surrounding the driven clamping roller and the driven clamping roller.

The grinding apparatus includes a rotary table having a rotary support shaft, the rotary table rotatable about the rotary support shaft, a grinder coupled to the rotary table such that the center of the rotary support shaft and the grinding wheel coincide with each other, and the rotary table; It is fastened by an arm, it can be made by having a rotating disc configured to drive the rotating table to draw a fan-shaped trajectory through the arm during the rotational drive.

In addition, the round bar discharge device is a conveyor for taking over and transporting the round bar, the cutting operation is completed in the cutting device from the round bar transfer device, discharge pusher for pushing the round bar transferred from the conveyor in the direction opposite to the conveyor, A stacking container for aligning and loading the round bar received from the discharge pusher side by side, and a sensor installed at an intersection of the conveyor and the loading container so that the discharge pusher can turn the round bar to a position of the loading container; Can be done.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a grinding machine for round bar end spherical processing according to an embodiment of the present invention.

Round bar end spherical processing grinding machine according to the present invention, as shown in Figure 1, round bar input device 100, round bar transfer shuttle 200, clamping device 300, grinding device 400, and round bar discharge device ( And 500).

Referring to each configuration and linkage relationship in accordance with the progress of the process, first, a plurality of round bars (1) to be processed in a large number is loaded in the hopper 101 of the round rod injection device 100 as shown in FIG. You can see it.

Then, the plurality of round rods 1 are resisted by the alignment roller 103 mounted in the opening 104 of the hopper 101 and aligned in a line, and are turned over to the groove 107 of the feed roller 102. The transfer roller 102, which receives the round bar 1 that is aligned and transported side by side, serves to seat the round bar 1 on the inclined plate 105 by repeating the forward and reverse rotations.

Next, the round bar transfer shuttle 200 is formed on the fixed shuttle 201 by rolling down each of the round bar (1) leaving the feed roller 102 of the round bar injection device 100 at a predetermined time interval on the inclined plate 105 The round bar 1 is transferred starting with being seated in the groove 203. The plurality of grooves 203 formed in the fixed shuttle 201 and the movable shuttle 202 are formed at the same distance intervals, and the fixed shuttle 201 supports the round bar 1 through the groove 203. Only to transfer the round bar (1) directly is the movable shuttle (202).

That is, the movable shuttle 202 repeats the up, forward, down, and retreat while the round bar 1 is seated in the groove 203 of the movable shuttle 202 by driving an inverse cam, The round bar 1 is gradually transferred from the first seated groove of the fixed shuttle 201 to the next groove located in the process progress direction, that is, the groove located in the right direction in the drawing, and the specific configuration and action associated with the movable shuttle 202 It will be described later.

Subsequently, the round bar 1 conveyed by the movable shuttle 202 is transferred to the grinding device 400, that is, when it is seated on the guide roller 316 located inside the two fixed shuttles 201. Fixed and rotated by the clamping device 300 located on the other side of the 400, the round bar (1) is fixed and rotated by the clamping device 300 is the process of the end surface is spherical processing by the grinding device 400 Will go through.

The grinding device 400 is located at the end of the round bar 1 to be processed by the grinder 403 for spherical processing, the grinder 403 is coupled to the rotary table 402, the rotary table 402 ) Is driven by the rotating disc 405 and the arm 404.

Therefore, the round bar 1 is rotated by the clamping device 300 and the grinding device 400 draws the locus of a fan shape and the end of the round bar 1 is ground, so that the spherical processing can be performed smoothly, grinding The finished round bar 1 is completed by grinding away from the clamping device 300.

The time when the clamping device 300 and the grinding device 400 is cutting is to proceed during the time when the movable shuttle 202 of the round bar transfer shuttle 200 is lowered by the drive of the dynamic cam and then retreat. The movable shuttle 202 is retracted and lowered again when the cutting operation is completed after the lowering, and the round bar, which has completed the grinding work, is turned over to the round bar discharge device 500, which is a subsequent device, and the round bar to be ground again is the clamping device 300. ) Is transferred to the position of the transfer to the grinding device 400, so that a continuous process is made.

Next, the round bar 1 after the grinding operation is completed is transferred to the distal end of the fixed shuttle 201 by the movable shuttle 202 to reach the position of the inclined plate 204, and the round bar 1 seated on the inclined plate 204. ) Rolls down by the inclination and is turned over to the conveyor 501 of the round bar discharge apparatus 500.

The round bar 1 seated on the conveyor 501 is transported along the traveling direction of the conveyor 501, and after reaching the position of the sensor 504, onto the loading container 503 by the discharge pusher 505. Stacked side by side and discharged. Of course, the discharge pusher 505 is to push the round bar 1 by receiving the signal of the sensor 504 installed at the intersection of the conveyor 500 and the loading container 503 as shown in FIG.

Figure 2 is a side view showing a round rod injection device shown in FIG.

The round bar injection device shown in FIG. 1 will be described in more detail in connection with FIG. 2.

First, the hopper 101 for loading a plurality of round bar 1 is installed to be inclined at a predetermined inclination angle as shown in Figure 2 is configured to be transported by the weight of the round bar (1) itself.

In addition, the alignment roller 103 is simply fastened to the opening 104 of the hopper 101 by a pin 106 without a separate power transmission means, and the cross section of the alignment roller 103 is not circular but flat on both sides. Since the shape of the opening 104 is adjusted so that the round bar 1 loaded on the hopper 101 can be rolled down and aligned in a line by its own weight.

Thus, the round bar 1 passed through the alignment roller 103 is seated in the groove 107 formed in the feed roller 102.

Here, the feed roller 102 is fastened to the roller shaft 108 to which the pinion 109 is coupled, and the rack 111 and pinion to the fluid pressure cylinder 110 for forward and reverse rotation of the feed roller 102. By the combination of (109) by the reciprocating motion of the fluid pressure cylinder 110, the feed roller 102 is configured to allow the forward and reverse rotation.

Accordingly, the plurality of round rods 1, which are aligned and rolled down side by side from the hopper 101, are transported by the round bar at a predetermined time interval by the transfer rollers 102 operating in the reciprocating motion of the fluid pressure cylinder 110. It is injected into the groove 203 formed in the fixed shuttle 201.

In addition, the fluid pressure cylinder 110 may be provided with a controller (not shown) to control the input time of the round bar.

3 is an exploded perspective view illustrating a coupling state between a movable shuttle shown in FIG. 1 and a component for cam driving of the movable shuttle;

Next, the movable shuttle shown in FIG. 1 will be described in more detail in connection with FIG. 3.

The movable shuttle 202 located next to each other inside the fixed shuttle 201 is coupled to the fastening plate 217 and the plurality of bolts 214 as shown in FIG. 3, and the fastening plate 217 also has a lower portion thereof. It is coupled to the driven guider 204 and the bolt 214 located at the end so that the movable shuttle 202 is to be driven with the driven guider 204.

Of course, the coupling method of the movable shuttle 202 and the driven guider 204 using the fastening plate 217 may be combined by welding or other methods in addition to the bolt coupling method shown in FIG. Will do.

At this time, the driven guider 204 coupled with the movable shuttle 202 through the fastening plate 217 has a parallel cam groove 205 to provide various movement trajectories of the rising, moving forward, lowering, and retracting of the movable shuttle 202. ) And an oblique cam groove 206 may be formed.

Here, looking at the parallel cam groove 205 through FIG. 3, the upper side parallel cam groove is deeper than the right side bone and the lower side parallel cam groove is formed on the right side deeper than the left side valley through FIG. 3. Able to know. This is to reciprocate between the upper end of the expansion cam groove and the lower end parallel cam groove when driving the cam will be described in detail.

Subsequently, a space in which the guiding guider 207 is inserted is provided in the lower portion of the driven guider 204 so that the guiding guider 207 is inserted into the space, and the driving roller 208 and the roller pin formed on the guiding guider 207 are provided. 209 is configured to be inserted into the diagonal cam groove 206 of the driven guider 204. Here, the prime mover 207 is configured to act as a prime mover element that is coupled to the fluid pressure cylinder 210 to provide power.

In addition, a pair of fixed side walls 211 are positioned at both sides of the driven guider 204, and the fixed rollers 212 and the roller pins 213 formed on the fixed side walls 211 are parallel to the driven guider 204. It is adapted to be inserted into the cam groove 205.

Of course, the fixed side wall 211 is to be fastened by inserting the bolt clip 216 between the bolt 214 and the nut 215 to be fixed while maintaining a gap with the driven guider 204, the fastening method is also known other As a known technique, various coupling methods can be used.

Here, the fixing side wall 211 can be seen that the bush 220 is formed so that the roller pin 213 is inserted, and the spring 218 is inserted into both sides of the bush 220. This is because the pin hole 219 formed in the center of the bush 220 is an oval shape so that the fixed roller 212 and the roller pin 213 and the parallel cam groove 205 formed on the driven guider 204 are in contact with each other. When the roller pin 213 is allowed to flow a predetermined amount from side to side, it is to provide a margin of space when driving the dynamic cam.

Therefore, the above-described coupling structure, when the motive guider 207 and the driven guider 204 are operated by the reciprocating motion of the fluid pressure cylinder 210, as a result of the movable shuttle 202 integrally coupled with the driven guider 204 ) Is a structure for operating along the trajectory drawn by the diagonal cam groove 206 and the parallel cam groove 205 formed in the driven guider 204, and is driven by adopting a so-called inverse cam driving method in which the driven joint is a cam. Characterized in that.

4 is a view for explaining the cam drive of the movable shuttle shown in FIG.

Next, the cam drive of the movable shuttle shown in FIG. 3 will be described in more detail with reference to FIG. 4.

FIG. 4 illustrates a coupling state between the prime mover 207 and the driven guider 204 shown in FIG. 3. That is, the prime mover roller 208 of the prime mover 207 is inserted into the diagonal cam groove 206 of the driven guider 204, and the fixed roller 212 formed in the fixed side wall is the parallel cam groove of the driven guider 204. It is inserted and positioned on 205.

In addition, the fixed roller 212 in Figure 4 has been described in Figure 3 that there is room for movement slightly left and right, but is always fixed in its original position, the movable shuttle 202 is integrally coupled with the driven guider 204 It has been described that the drive together and the fixed shuttle 201 is always fixed to the original position.

A is the initial state of the movable shuttle, B is the upward driving state of the movable shuttle, C is the forward driving state of the movable shuttle, and D is the downward driving state of the movable shuttle.

In addition, I is the position of the round bar seated in the first groove in the fixed shuttle, F is the position of the round bar seated in the next groove of the fixed shuttle.

First, referring to A, the prime roller 208 is located at the upper end of the diagonal cam groove 206 of the driven guider 204, and the fixed roller 212 is located at the right side of the upper parallel cam groove 205. The round bar 1 is located in the first groove I of the fixed shuttle.

At this time, if the driving guide 207 received power from the fluid pressure cylinder to the right in the drawing as shown in FIG. 3, the right side of the upper parallel cam groove 205 is not deep, so the driven guider 204 is fixed Receiving the resistance of the roller 212 can not advance, and eventually the driving roller 208 is driven up by a height that moves to the position of the lower end of the oblique cam groove 206 relatively.

Thus, the B state starts from the initial A state and shows the end of the ascending drive. As a result, the movable shuttle 202 is raised with the round bar 1 seated thereon.

Subsequently, in the state B, the prime mover 207 continues to operate on the right side in the drawing by driving the fluid pressure cylinder. At this time, the fixed roller 212 is located in the parallel cam groove 205 at the lower end of the driven guider 204 relatively, as shown in FIG. 3, the right side of the lower parallel cam groove 205 is deep in the driven guider 204. It is possible to drive forward without the resistance of the fixed roller (212).

Thus, C shows the state of driving forward starting from B. Fixed roller 212 located on the lower right side parallel cam groove in B can be seen that the parallel movement from the right to the left in C. As a result, it can be seen in FIG. 4 that the round bar 1 is transferred from I to F while seated on the movable shuttle 202.

Next, in C, the motive guide 207 is driven to the left in the drawing by the fluid pressure cylinder. Then, as described in FIG. 3, the driven guider 204 is driven downward because the left side of the lower parallel cam groove 205 is not deep and receives the resistance of the fixed roller 212, and the diagonal cam groove of the driven guider 204 is reduced. The driving roller 208, which was positioned at the lower end, is lowered by the height moved to the position of the upper end of the diagonal cam groove 206 of the driven guider 204 relatively.

Thus, D shows the state starting from C and ending the lowering drive. As a result, the round bar 1 is separated from the movable shuttle 202 while being seated at the position F of the next groove of the fixed shuttle 201 due to the lowering of the movable shuttle 202.

Finally, the driving guide 207 in D continues to the left in the drawing, the left side of the upper end of the parallel cam groove 205 of the driven guider 204 is deep and can drive backward without resistance of the fixed roller 212 .

As a result, in D, the movable shuttle 202 returns to the initial state A, and can subsequently transfer the round bar 1 by repeating the above-mentioned ascending, forwarding, descending, and retracting driving again.

In addition, a fluid pressure cylinder that provides power of the motive guider may include a control unit (not shown) to control driving time of the up, forward, down, and retraction of the dynamic cam.

FIG. 5 is a front view illustrating the clamping apparatus illustrated in FIG. 1, and FIG. 6 is a side view illustrating the clamping apparatus illustrated in FIG. 1.

In FIG. 1, when the round bar received by the dynamic cam driving of the round bar transfer shuttle reaches the grinding device, the clamping device starts driving.

5 and 6, the clamping device 300 has a pair of guide rails 301 for guiding a direction of movement as shown in FIGS. 5 and 6, and a guide rail 301. There is a fluid pressure cylinder 302 fixed at the top to provide reciprocating power, and there is a housing 303 reciprocating on the guide rail 301 and engaged with the fluid pressure cylinder 302.

Of course, the spring 317 wound on the guide rail 301 is to help the upward movement of the fluid pressure cylinder 302 to raise the housing 303.

The housing 303 is provided with a plate-shaped stopper 304 and a caterpillar 305, and an alignment pusher 306 is provided below the housing 303 to closely contact the grinder with a round bar end portion.

The alignment pusher 306 is driven by the reciprocating motion of the fluid pressure cylinder 307 as shown in FIG. 6, in which the plate-shaped stopper 304 shows the tapered portion of the round bar 1 when the housing 303 is lowered. The fluid pressure cylinder 315 is provided to be in close contact with the groove 308 as shown in FIG. 1 to prevent excessive close contact of the alignment pusher 306.

In addition, the feature of the shape of the plate-shaped stopper 304 is to protect the caterpillar 305 from the chip (chip) generated during the processing of the grinder.

In addition, the caterpillar 305 is fastened to the motor 309 to provide the driving force of the rotational movement, and the driving clamping roller 310, and is fastened to the housing 303 and provided with a spring 312, narrowed to a predetermined angle and far away It consists of a clamper 313, a pair of driven clamping rollers 311 fastened to both ends of the clamper 313, and a timing belt 314 surrounding the driven clamping roller 310 and the driven clamping roller 311. It is.

That is, the caterpillar 305 wraps and secures the round bar 1 seated on the guide roller 316 fixed to the inside of both fixing shuttles 201 with the timing belt 314 when the housing 303 is lowered. Rotating the circular clamping roller 310 to rotate the round bar (1).

Therefore, the clamping device 300 is to be able to perform a solid close fixing and rotation of the round bar at the same time.

In addition, the fluid pressure cylinder and the motor may include a control unit (not shown) to drive and control the fixing, detachment, and rotation time of the round bar 1.

7 is a schematic cross-sectional view showing the grinding apparatus shown in FIG.

Looking at the configuration of the grinding device for grinding the round bar fixed and rotated by the clamping device through Figure 7 in conjunction with Figure 1, the bush 411 is fastened to the bed 413 and the bearing 412 to the bush 411 The rotary support shaft 401 is inserted between the rotary support shaft 401, and the grinder 403 is positioned on the rotary table 402 which is coupled to the rotary support shaft 401, and the rotary table 402 and the arm 404 The rotating disc 405 fastened through the motor 406 is driven.

Here, the rotary support shaft 401 and the rotary table 402 is briefly shown in the fastening state of the fastening method and the pin between the rotary disk 405 and the arm 404, arm 404 and the rotary table 402 Although the state of fastening by 414 is briefly illustrated, it will be apparent to those skilled in the art that the above fastening method or means can be replaced by a fastening method or means as known techniques.

As a result, the rotary table 402, which is powered by the arm 404 by the driving of the rotary disk 405 by the motor 406, performs a reciprocating drive in a fan shape, and rotates to support the rotary table 402. The center of the support shaft 401, the center of the grinding wheel 407 of the grinder 403, and the intersection point of the pair of guide rollers 316 adjacent to each other in FIG. If the center of the round bar coincides with the center position of, the roundness of the machined surface can be obtained during spherical machining.

7 shows that the grinder 403 is configured to transmit and rotate the power of the motor 408 to the grinding wheel 407 by a combination of the belt 409 and the pulley 410.

In addition, the above-described motors 406 and 408 may be provided with a control unit (not shown) to control the rotation disc 405 and the grinder 403 to rotate at an appropriate time.

In the present invention, it will be apparent to those skilled in the art that the fluid pressure cylinder is a generic term for a known hydraulic cylinder or pneumatic cylinder, and may be replaced as long as it is a power source capable of performing the same.

In addition, it has been described that the control unit may be provided in the fluid pressure cylinder and the motor as a power source in the present invention. Therefore, the control unit 600 shown in FIG. 1 is connected to the control signal according to the round bar turnover. By applying to each other, the process time can be managed and the organic coupling between the components can be automated.

Therefore, according to the present invention, by providing the clamping device as described above, it is possible to accurately fix the center of the round bar and improve the roundness of the processed surface when spherical processing the end portion of the round bar.

In addition, by providing the grinding device as described above, it is possible to omit complicated cutting operations and at the same time improve the surface roughness, so that the round bar processing can be performed in large quantities.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and modifications are within the scope of the appended claims.

Claims (11)

In the machine tool for spherical processing the cross section of the round end portion, Round bar input device for loading a plurality of the round bar and individually input one by one with a predetermined time interval; A round bar transfer shuttle which loads each round bar received from the round bar input device at a predetermined distance and transfers the round bar step by step through a drive of a dynamic cam; Clamping device for repeating the fixed before the grinding process and the separation after the grinding process for spherical processing the round bar transferred from the round bar transfer shuttle; A grinding device positioned on the other side of the clamping device, the grinding device including a grinder for spherical processing the distal end portion of the round bar fixed by the clamping device; And A round bar discharge device which receives the round bar having completed the grinding operation in the grinding device from the round bar transport device and discharges the round bar to the outside; Round bar end spherical processing machine, characterized in that provided with. The method of claim 1, The round rod injection device, A hopper for loading a plurality of the round bars and discharging the round bars side by side through an opening formed in a lower portion thereof; A feed roller which seats the round bar discharged from the hopper in a groove formed on an outer circumference thereof and individually transports the round bar at a predetermined time interval by forward and reverse rotation; And A fluid pressure cylinder coupled to the transfer roller by a combination of a rack and a pinion to forward and reverse rotate the transfer roller; Round bar end spherical processing machine, characterized in that provided with. The method of claim 2, The hopper is, And a sorting roller positioned at the opening and fastened by a pin and aligned with the round bar loaded in the hopper in a line, and turning over to the feed roller. The method of claim 1, The round bar transfer shuttle, A fixed shuttle which has a plurality of grooves formed therein so as to seat the round bar received from the round bar injection device at a predetermined distance interval and does not drive in the original position; And A plurality of grooves are formed side by side with the fixed shuttle and the same distance as the groove formed in the fixed shuttle, and the round bar is raised, moved forward, lowered to the next groove located in the process progress direction from the first seated groove of the fixed shuttle A movable shuttle that repeats, and retreats and transfers stepwise; Round bar end spherical processing machine, characterized in that comprising a. The method of claim 4, wherein In the movable shuttle, A driven guider coupled by the movable shuttle and the fastening plate and having a parallel cam groove and an oblique cam groove formed to perform a dynamic cam driving of the movable shuttle; A fixed side wall positioned at left and right sides of the driven guide and having a fixed roller and a roller pin inserted into the parallel cam groove to guide the driven guide to move in the shape of the parallel cam groove; And It is provided with a moving roller and a roller pin inserted into the cam cam groove and positioned inside the driven guide to guide the driven guide to move in the shape of the cam cam groove. A driving guider that provides a driving force; Round bar end spherical processing machine, characterized in that coupled to perform a dynamic cam drive. The method of claim 1, The clamping device, A guide rail for guiding a direction of movement; A housing reciprocating on the guide rail; A fluid pressure cylinder fixed to an upper portion of the guide rail and providing power to the housing to reciprocate along the guide rail; An alignment pusher positioned at an unprocessed end of the round bar to push the end of the round bar to be located at the grinder; A plate-shaped stopper coupled to the housing and having a groove formed therein to allow the groove to be inserted into the tapered portion of the round bar when the housing is lowered to prevent excessive close contact of the alignment pusher; A caterpillar fastened to the housing to fix and rotate the round bar during grinding by the reciprocating motion of the housing, and to disengage after grinding; And A guide roller positioned below the caterpillar and fixed to an inner side of the fixed shuttle to seat the round bar on which grinding processing is to be performed; Round bar end spherical processing machine, characterized in that provided with. The method of claim 6, The caterpillar, A driving clamping roller coupled to the motor fastened to the housing to provide power of rotational movement; A clamper engaged with the housing and having a spring and configured to be narrowed and moved away from the predetermined angle; A driven clamping roller fastened to both ends of the clamper; And A timing belt surrounding the motive clamping roller and the driven clamping roller; Round bar end spherical processing machine, characterized in that provided with. The method of claim 1, The grinding device, A rotary table having a rotary support shaft and rotatable about the rotary support shaft; The grinder coupled to the rotary table to perform grinding; And A rotating disc fastened by the rotary table and the arm and configured to drive the rotary table by drawing a fan-shaped trajectory through the arm when the rotary drive is driven; Round bar end spherical processing machine, characterized in that comprising a. The method of claim 1, The round bar discharge device, A conveyor that transfers the round bar, which has been ground in the grinding device, from the round bar transfer device and transfers the round bar; And A loading container for loading the round bar received from the conveyor; Round bar end spherical processing machine, characterized in that provided with. The method of claim 9, The round bar discharge device, A discharge pusher positioned on one side of the conveyor to push the round bar transferred from the conveyor in a direction opposite to a traveling direction of the conveyor; A sensor installed at an intersection of the conveyor and the loading container so that the discharge pusher can take over the round bar side by side with the loading container; Round bar end spherical processing machine, characterized in that provided with. The method of claim 1, The round bar feeding device further includes a control unit for controlling round bar injection time, and further comprising a control device for controlling driving of the round bar transfer shuttle, the clamping device, and the grinding device with a signal received from the control unit. Grinding machine for round bar end spherical processing.