WO2007145396A1 - The interior super-finishing device and method for controlling thereof - Google Patents

The interior super-finishing device and method for controlling thereof Download PDF

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Publication number
WO2007145396A1
WO2007145396A1 PCT/KR2006/003241 KR2006003241W WO2007145396A1 WO 2007145396 A1 WO2007145396 A1 WO 2007145396A1 KR 2006003241 W KR2006003241 W KR 2006003241W WO 2007145396 A1 WO2007145396 A1 WO 2007145396A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
grinding
grinding material
grinding head
supporting
Prior art date
Application number
PCT/KR2006/003241
Other languages
French (fr)
Inventor
Soo Ryong Jung
O Chol Shin
Hyung Jae Shin
Wan Soo Kim
Seok Ii Lee
Han Woong Park
Original Assignee
Solomon Mechanics Co., Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Solomon Mechanics Co., Ltd filed Critical Solomon Mechanics Co., Ltd
Publication of WO2007145396A1 publication Critical patent/WO2007145396A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/004—Machines or devices using grinding or polishing belts; Accessories therefor using abrasive rolled strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/02—Machines or devices using grinding or polishing belts; Accessories therefor for grinding rotationally symmetrical surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/061—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/02—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/06—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces internally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/06—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces internally
    • B24B5/10—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces internally involving a horizontal tool spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
    • B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/04—Rigid drums for carrying flexible material
    • B24D9/06—Rigid drums for carrying flexible material able to be stripped-off from a built-in delivery spool

Definitions

  • the present invention relates to a polishing apparatus, and more particularly, to an inner surface super-finishing apparatus for finishing automatically the inner surface of objects and a method for controlling the same.
  • polishing is a processing method for improving quality of an object by grinding and polishing the object using a material of hard grains or hard powder.
  • a related art polishing process is performed using grindstones. Processing methods using grindstone particles are generically known as a grindstone particle process.
  • a related art polishing apparatus includes a motor (not shown) and a circular grindstone 20 mounted on a rotational shaft 10 of the motor and rotating together with the motor. Therefore, a user directly holds an object 30 with his hands, and has the object 30 contact a peripheral surface of the grindstone in order to perform grinding.
  • An object of the present invention is to provide an inner surface super-finishing apparatusthat grinds automatically an inner surface of an object.
  • Another object of the present invention is to provide a control method of an inner surface super- finishing apparatus that grinds automatically an inner surface of an object.
  • an inner surface super-finishing apparatus including: an inner surface grinder including: a film grinding material formed in a film type, for directly contacting an object, and grinding a surface of the object; a feeding roller for feeding the film grinding material; a collecting roller installed on one side of the feeding roller, for collecting the film grinding material used for grinding the object; supporting rollers for supporting the film grinding material provided from the feeding roller to the collecting roller; a grinding head protruding to one side to support the film grinding material such that the film grinding material contacts an inner surface of the object; a plunger for supporting the grinding head; and a shaking member installed on a right side of the plunger, for allowing the plunger to reciprocate a predetermined interval; a horizontal transferring member for forcing horizontal movement of the inner surface grinder; a back-and-forth transferring member for forcing back-and-forth movement of the inner surface grinder; and an object supporting member installed on one side of
  • a cylinder type grinding head is inserted into a rotating object to perform the grinding. So, the inner surface grinding process is done more efficiently than a related art constitution, and a process accuracy is improved.
  • the grinding process can be automatically performed. That is, the rotation of the object and movement of the inner surface grinder are automatically performed, which improves the efficiency of the work.
  • FIG. 1 is a perspective view illustrating a use state of a grinder according to the related art
  • FIG. 2 is a perspective view illustrating an inner surface super-finishing apparatus according to a preferred embodiment of the present invention
  • FIG. 3 is a perspective view illustrating an inner surface grinder according to the present invention
  • FIGS. 4 and 5 are a front view and a rear side view illustrating a grinding head, which is a principal member according to an embodiment of the present invention
  • FIG. 6 is a front view illustrating a inner constitution of a shaking member according to an embodiment of the present invention.
  • FIG. 7 is a schematic block diagram illustrating a control system and method of an inner surface super-finishing apparatus according to the present invention. Best Mode for Carrying Out the Invention
  • an inner surface super-finishing apparatus including:
  • an inner surface grinder including: a film grinding material formed in a film type, for directly contacting an object, and grinding a surface of the object; a feeding roller for feeding the film grinding material; a collecting roller installed on one side of the feeding roller, for collecting the film grinding material used for grinding the object; supporting rollers for supporting the film grinding material provided from the feeding roller to the collecting roller; a grinding head protruding to one side to support the film grinding material such that the film grinding material contacts an inner surface of the object; a plunger for supporting the grinding head; and a shaking member installed on a right side of the plunger, for allowing the plunger to reciprocate a predetermined interval; a horizontal transferring member for forcing horizontal movement of the inner surface grinder; a back-and-forth transferring member for forcing back-and-forth movement of the inner surface grinder; and an object supporting member installed on one side of the inner surface grinder, for supporting and rotating the object.
  • the horizontal transferring member includes: a couple of horizontal guiders re- spectivelyprovided to an upper front end and an upper rear end of the support die for supporting the inner surface grinder, and installed horizontally; horizontal rails installed on an upper surface of the couple of horizontal guiders; a horizontal screw provided long horizontally between the couple of horizontal guiders to force horizontal movement of the inner surface grinder; and a horizontal motor installed on one side of the horizontal screw, for providing torque to the horizontal screw.
  • the back-and-forth transferring member includes: back-and-forth rails formed back and forth at a left end and a right end of a movement die; a back-and-forth screw provided on an inner surface of the movement die, for forcing the inner surface grinder to move back and forth; and a back-and-forth motor installed at one end of the back- and-forth screw, for rotating the back-and-forth screw.
  • the object supporting member includes: a chuck for holding the object "W”; and a motor assembly is provided to one end of the chuck, for rotating the chuck.
  • an inner surface super-finishing apparatus comprising an inner surface grinder including: a film grinding material formed in a film type, for directly contacting an object, and grinding a surface of the object; a feeding roller for feeding the film grinding material; a collecting roller installed on one side of the feeding roller, for collecting the film grinding material used for grinding the object; supporting rollers for supporting the film grinding material provided from the feeding roller to the collecting roller; a grinding head protruding to one side to support the film grinding material such that the film grinding material contacts an inner surface of the object; a plunger for supporting the grinding head; and a shaking member installed on a right side of the plunger, for allowing the plunger to reciprocate a predetermined interval.
  • a tension-control member provided to the end of the feeding roller, for controlling the tension of the film grinding material.
  • the tension-control member includes: a control hinge protruding from a front side of the inner surface grinder; a control pendulum provided to be rotatable around the control hinge; and a contact roller protruding from one side of the control pendulum and directly contacting the film grinding material.
  • the plunger includes: a body provided to be movable horizontally; a couple of guide rollers provided to the front side of the body; and a fixing key for fixing the grinding head.
  • One end of a finishing-oil hose for guiding finishing oil to the grinding head is connected to the fixing key, and a passage for guiding finishing oil provided through the finishing-oil hose to the grinding head, is formed in the fixing key.
  • a feeding groove for feeding the film grinding material and a collecting groove for collecting the film grinding material are formed in one side of the grinding head.
  • a key face contacting the one side of the fixing key is formed on the one side of the grinding head.
  • a contact member for allowing the film grinding material to stick on the inner surface of the object is further provided to a front end of the grinding head.
  • a method for controlling an inner surface super-finishing apparatus includes: moving an inner surface grinder back and forth to allow a position of a grinding head and a position of an object to correspond to each other; putting and withdrawing a front end of the grinding head to and from an inside of the object, respectively; rotating the object; providing the grinding head with finishing oil; reciprocating the plunger including the grinding head horizontally.
  • the reciprocating of the plunger includes reciprocating the grinding head horizontally when the inner surface of the object is processed by the film grinding material. [34] According to the inner surface super-finishing apparatus and the method for controlling the same with the constitution according to the present invention, the inner surface grinding process is done efficiently. Mode for the Invention
  • FIGS. 1 and 2 are perspective views illustrating an inner surface super-finishing apparatus and an inner surface grinder according to the present invention, respectively.
  • a support die 100 is provided to a lower portion of the inner surface super-finishing apparatus according to the present invention, the support die is formed at a predetermined height to support a lot of parts including an inner surface grinder 200, which will be described below.
  • An adjusting screw 102 whose height is adjustable is provided at a lower end of the support die 100.
  • the support die 100 is formed to have approximately a rectangular shape, and a die guider 104 is formed at a predetermined height along an upper periphery of the support die 100.
  • the die guider 104 prevents a by-product like finishing oil, which will be described below, from leaking out to the outside.
  • a horizontal carrier 110 for moving the inner surface grinder 200 horizontally is provided on an upper surface of the support die 100.
  • the horizontal carrier 110 includes horizontal guiders 112, horizontal rails 114, a horizontal screw 116, and a horizontal motor 118.
  • the horizontal guiders 112 are provided in a pair on the upper surface of the support die 100. That is, the horizontal guiders 112 are formed long horizontally at an upper front end and an upper rear end of the support die 100 to guide horizontal movement of the inner surface grinder 200.
  • the horizontal rail 114 is provided on an upper surface of the horizontal guider 112.
  • the horizontal rail 114 is formed at the same length as that of the horizontal guider 112 to directly contact a lower surface of a movement die 120 supporting the inner surface grinder 200. Therefore, when the movement die 120 slides on the horizontal rail 114 horizontally, the inner surface grinder 200 moves horizontally.
  • the horizontal screws 116 are provided horizontally long between the couple of horizontal guiders 112. the horizontal screw 116 moves relatively to a horizontal nut (not shown) mounted in the movement die 120, to force the movement die 120 and the inner surface grinder 200 to move horizontally.
  • a horizontal nut (not shown) mounted in the movement die 120, to force the movement die 120 and the inner surface grinder 200 to move horizontally.
  • an outer surface of the horizontal screw 116 is threaded.
  • the horizontal motor 118 is mounted at a right end of the horizontal screw 116 to provide torque to the horizontal screw 116. Therefore, when the horizontal motor 118 is rotated by power from outside, the power is transferred to the horizontal screw 116 to rotate the screw.
  • the movement die 120 is installed on the support die 100. That is, the rectangular movement die 120 is provided on the upper surface of the horizontal guider 112 and the horizontal screw 116. The lower rear portion and front portion of the movement die 120 contact the horizontal rail 114 and the horizontal screw 116, respectively.
  • a back-and-forth-movement member 130 for forcing back- and-force-movement of the inner surface grinder 200 is provided on an upper surface of the movement die 120.
  • the back-and-forth-movement member 130 includes back- and- forth rails 132, a back- and-forth screw 134, and a back-and-forth motor (not shown).
  • the back-and-forth rails 132 are formed long back-and forth at the left end and the right end of the movement die 120 to allow a main machine basement 140 to slide back and forth.
  • the back-and-forth screw 134 is provided on an inner side of the movement die
  • the back-and-forth screw 134 corresponds to the horizontal screw 116 and forces the basement of main machine basement 140 and the inner surface grinder 200 to move back and forth.
  • the back-and-forth screw 134 is formed to have a shape corresponding to that of the back-and-forth nut (not shown) formed at a bottom of a main machine basement 140, and moves relatively to the back-and-forth nut (not shown). That is, a male screw is formed in an outer surface of the back- and-forth screw 134 to move relatively to a female screw formed in the back-and-forth nut.
  • the back-and-forth motor is provided at a rear end of the back-and-forth screw 134.
  • the back-and-forth motor (not shown) generates power using power applied from the outside to rotate the back- and-forth screw 134.
  • the main machine basement 140 is installed above the movement die 120.
  • the main machine basement 140 is flat and supports the inner surface grinder 200.
  • the bottom of the main machine basement 140 contacts the back-and-forth rails 132 and the back-and-forth screw 134.
  • the inner surface grinder 200 is provided on an upper side of the main machine basement 140.
  • the inner surface grinder 200 has a quadrangular box shape, on which parts for directly processing the inner surface are installed.
  • the inner surface grinder 200 includes a film grinding material
  • a feeding roller 204 for feeding the film grinding material 202
  • a collecting roller 206 installed at the bottom of the feeding roller 204, for collecting the film grinding material used for grinding the object "W”
  • supporting rollers 208 and 208' for supporting the film grinding material 202 provided from the feeding roller 204 to the collecting roller 206
  • a grinding head 210 protruding to one side (left side) and supporting the film grinding material 202 such that the film grinding material 202 contacts an inner surface of the object "W”
  • a plunger 220 for supporting the grinding head 210 and a shaking member 230 installed on a right side of the plunger 220, for allowing the plunger 220 to reciprocate a predetermined interval horizontally.
  • At least one couple of the supporting rollers 208 and 208' are provided at the left side of the feeding roller 204 and the collecting roller 206. That is, an upper supporting roller 208 is provided at the left side of the feeding roller 204 to guide the film grinding material 202 from the feeding roller 204, and a lower supporting roller 208' is installed under the upper supporting roller 208 to guide the film grinding material 202 to the collecting roller 206. An additional supporting roller can be also added.
  • a tension-control member 240 is further provided between the upper supporting roller 208 and the feeding roller 204.
  • the tension-control member 240 controlling the tension of the film grinding material 202 is further provided at the end of the feeding roller 204. That is, it controls the tension of the film grinding material 202 appropriately for a swift grinding process.
  • the tension-control member 240 includes a control hinge 242 protruding from the face of the inner surface grinder 200, a control pendulum 244 provided in a predetermined length, for rotating around the control hinge 242, and a contact roller 246 protruding from the front side of the control pendulum 244 to directly contact the film grinding material 202.
  • one end of the control pendulum 244 (a left end in FIG. 3) is rotatably coupled at the control hinge 242.
  • the contact roller 246 is circular and the film grinding material 202 contacts a peripheral surface of the contact roller 246.
  • the contact roller 246 is fixed or rotatably coupled at the control pendulum 244.
  • a spring 248 is further provided to the control pendulum 244 and predetermined elasticity force of the spring 248 pulls the control pendulum 244 downward so that the film grinding material 202 maintains predetermined tension.
  • a stop sensor 250 is further provided at a right side of the control pendulum 244.
  • the stop sensor 250 detects a rotation angle of the control pendulum 244 to stop operation of the inner surface grinder 200. That is, when the tension of the film grinding material 202 is excessively increased and right end of the control pendulum 244 is close to the stop sensor 250, the stop sensor 250 stops the inner surface grinder 200.
  • the plunger 220 is provided at a front left end of the inner surface grinder 200.
  • the plunger 220 for supporting the grinding head 210 includes a body 222 installed to be movable horizontally, a couple of guide rollers 224 and 224' provided on the front face of the body 222, and a fixing key 226 for fixing the grinding head 210.
  • a couple of the guide rollers 224 and 224' include an upper guide roller 224 for guiding the film grinding material 202 from the feeding roller 204, to the grinding head 210, and a lower guide roller 224 for guiding the film grinding material 202 from the grinding head 210, to the collecting roller 206.
  • a size of the lower guide roller 224' corresponds to a size of the upper guide rollers 224
  • the lower guide roller 224' is spaced a predetermined distance below the upper guide rollers 224.
  • a couple of the guide rollers 224 and 224' are fixed or rotatably installed on the front side of the plunger 220. It is desirable that a couple of the guide rollers 224 and 224' are rotatably installed.
  • the fixing key 226 is formed to have a predetermined length horizontally, and fixes a right end of the grinding head 210.
  • a side-section of the fixing key 226 is formed to have a trapezoidal shape because a height of a rear end of the fixing key 226 is higher than a height of a front end of the fixing key 226. Therefore, the fixing key 226 is coupled on the plunger 220 by two fixing screws 226'.
  • finishing-oil hose 228 One end of a finishing-oil hose 228 is connected to the fixing key 226.
  • the finishing-oil hose 228 provides the grinding head 210 with finishing oil.
  • One end of the finishing-oil hose 228 is connected to a front side of the inner surface grinder 200 and the other end is connected to the fixing key 226. Therefore, though not shown, a passage for guiding finishing oil provided through the finishing-oil hose 228 to the grinding head 210, is formed in the fixing key 226.
  • the grinding head 210 has a cylinder shape, is installed on a left end of the inner surface grinder 200 to protrude leftward. That is, as illustrated, a left side of the grinding head 210 protrudes leftward from the inner surface grinder 200. Therefore, the film grinding material 202 is wound around a left end of the grinding head 210 to grind the inner surface of the object "W". A construction of the grinding head 210 will be described below in detail.
  • Guide pipes 260 allow the plunger 220 to move horizontally.
  • the cylindrical guide pipes are inserted horizontally into an upper end and a lower end of the plunger 220. Therefore, the guide pipes 260 allow the plunger 220 to move horizontally, and both horizontal ends of the guide pipes 260 are fixed at the front side of the inner surface grinder 200 by fixing members 262.
  • the shaking member 230 is provided on a right side of the plunger 220.
  • the shaking member 230 is connected to the right end of the plunger 220 and an eccentric member provided in the shaking member 230, forces the plunger 220 and the grinding head 210 to reciprocate horizontally within a predetermined interval. That is, the eccentric member converts a rotational motion of the shaking motor (not shown) into a horizontal linear motion.
  • a construction of the shaking member 230 will be described below in detail.
  • a film transfer member 270 is installed between the lower supporting roller 208' and the collecting roller 208.
  • the film transfer member 270 for feeding and collecting the film grinding material 202 with constant speed has two gears engaged with each other. That is, the film transfer member 270 rotates with the two gears engaged with each other to pull the film grinding material 202 by one step. So it is desirable that at least one of the gears should be rotated by a step motor (not shown).
  • An object supporting member 280 for supporting and rotating the object "W” is further provided on an upper side of the supporting die 100.
  • the object supporting member 280 is provided at the left end of the supporting die 100, and is spaced upward a predetermined distance from an upper surface of the supporting die 100 by an object supporting die 280'.
  • the object supporting member 280 includes a chuck 282 for holding the object "W” and a motor assembly 284 for rotating the chuck 282.
  • the motor assembly 284 is spaced a predetermined distance from the chuck 282 and torque generated by the motor assembly 284 is transferred to the chuck 282 by a belt (not shown). Since a construction of the chuck 282 is generally known in the art, detailed description thereof will be omitted.
  • a cover 286 is further provided at an upper end of the object supporting member
  • the cover 286 is rotatably installed to prevent finishing oil supplied via the left end of the grinding head 210 from splashing. It is desirable that the cover 286 is transparent so that a process performed in the cover can be visible to the outside.
  • a control panel 290 is further provided to a front of the supporting die 100.
  • the control panel 290 is supported by a panel supporting bar 292 that protrudes to the front from the supporting die 100 and then is bent upward.
  • the control panel 290 includes display panel 294 for displaying a operational status of the inner surface grinder 200, and buttons 296 for controlling and setting the operational status of the inner surface grinder 200.
  • FIG. 4 and FIG. 5 illustrate a construction of the grinding head 210 in more detail.
  • FIG. 4 is a front view illustrating the grinding head 210 and FIG. 5 is a rear view illustrating the grinding head 210.
  • the grinding head 210 has a cylindrical shape on the whole and a feeding groove 300 and a collecting groove 302 are formed horizontally long in the front side of the grinding head 210.
  • the feeding groove 300 and the collecting groove 302 are narrow in vertical width and divided from each other by a divider 304 having a thin flat sheet shape.
  • the feeding groove 300 is formed on an upper side of the divider 304 to guide the film grinding material 202 provided by the feeding roller 204 to a front end (left end in FIG. 4) of the grinding head 210 from a right end of the grinding head 210.
  • the collecting groove 302 is formed on a lower side of the divider 304 to guide the film grinding material 202 to the right end of the grinding head 210 that has passed through the front end (left end in FIG. 4) of the grinding head 210.
  • a guide surface 312 is inclined at a right end (in FIG. 4) of the end portion of the head 310.
  • the film grinding material 202 is wound around the guide surface 312.
  • a couple of discharge ports 314 are provided in the guide surface 312.
  • the discharge ports 314 for providing the front end of the grinding head 210 with the finishing oil is formed to communicate with the finishing oil passage (not shown).
  • the finishing oil provided through the finishing-oil hose 228 is provided to the front end of the grinding head 210 through the discharge ports 314.
  • the finishing oil provided through the discharge ports 314 is supplied to a portion between the film grinding material 202 and the guide surface 312 formed at the front end of the grinding head 210 to form a lubricant layer.
  • a key face 320 is formed on an upper side of the grinding head 210.
  • a contact member 330 is further provided to the front end (left end in FIG. 4 and right end in FIG. 5) of the grinding head 210.
  • the contact member 330 having a predetermined size is provided to the rear side (front side in FIG. 5) of the guide surface 312.
  • the contact member 330 for sticking the film grinding material 202 on the inner surface of the object "W" is formed of an elastic and abrasion-resistant material.
  • the contact member 330 is made of urethane and a surface of the contact member 330 is higher than a surface of the grinding head 210 by 2.5 mm.
  • the contact member 330 has a roller shape and is fixedly mounted in a front end of the grinding head 210. The surface of the contact member 330 is higher than the surface of the grinding head 210 by 2.5 mm.
  • the film grinding material 202 on the contact member 330 contacts directly the inner surface of the object "W" for grinding process.
  • FIG. 6 illustrates an inner construction of a shaking member 230 according to an embodiment.
  • the shaking member 230 includes a shaking frame 232 linked with the plunger 220 and an eccentric member 234 forcing the shaking frame 232 to shake.
  • a left end of the shaking frame 232 is linked with a right end of the body 222 of the plunger 220 by a link shaft 236, and a circular contact hole 238 is formed to pass through the right portion of the shaking frame 232.
  • the eccentric member 234 has two circular plates of different sizes. That is, the eccentric member 234 has a circular center plate 234' serving as a center of rotation and a circular contact plate 234" having a bigger diameter than that of the circular center plate 234'.
  • the center plate 234' and the contact plate 234" are fixed with each other or are integrally formed to be rotated together around a center "O" of the center plate 234'.
  • the contact plate 234" directly contacts the shaking frame 232. That is, the contact plate 234" is inserted into an inside of the contact hole 238 formed in the shaking frame 232. Therefore, an outer diameter of the contact plate 234" has a size corresponding to that of an inner diameter of the contact hole 238. In more detail, the outer diameter of the contact plate 234" is slightly smaller than the inner diameter of the contact hole 238 to allow an outer surface of the contact plate 234" to slide on an inner surface of the contact hole 238 smoothly.
  • the center O of the center plate 234' is separated a distance 'd' from a O' of the contact plate 234". Therefore, as the eccentric member 234 rotates, the plunger 220 moves by '2d' horizontally. That is, the plunger 220 is a linear horizontal motion device and the shaking frame 232 is linked with the plunger 220 by a link shaft 236. So, the rotation of the eccentric member 234 moves the plunger 220 horizontally.
  • the control method of the inner surface super-finishing apparatus includes moving the inner surface grinder 200 back and forth to allow a position of the grinding head 210 to correspond to a position of the object "W" (S400), putting and withdrawing the front end(left end) of the grinding head 210 to and from an inside of the object "W", respectively (S410), rotating the object "W” by rotating the chuck 282 (S420), providing the grinding head 210 with finishing oil (S430) through the finishing-oil hose 228, and reciprocating the plunger 220 including the grinding head 210 horizontally (S440).
  • the operation S400 of moving the inner surface grinder 200 back and forth using the back- and- forth transferring member 130 allows the main machine basement 140 to be moved back and forth by the back-and-forth motor (not shown).
  • the inner surface grinder 200 is moved horizontally by the horizontal transferring member 110. That is, during the grinding process, the inner surface grinder 200 moves to left and the grinding head 210 should contact the object "W”. After the grinding process, the inner surface grinder 200 moves to right and the grinding head 210 should be separated from the object "W”.
  • the object "W” and the grinding head 210 are aligned at a predetermined position. That is, through the operations S400 and S410, the inner surface grinder 200 moves and the film grinding material 202 contacting the contact member 330 of the grinding head 210, contacts the inner surface of the object "W", so that the grinding process can be performed.
  • the operation S420 of rotating the chuck 282 holding the object "W” using the object supporting member 280 can be performed by rotating the motor assembly 284. That is, when the motor assembly is rotated by power applied from the outside, corresponding torque is transmitted to the chuck 282 via belt (not shown) and thus rotates the chuck 282. So, the object "W” installed in the chuck 282 is rotated.
  • the operation S440 is performed by the shaking member 230 described in the above. That is, a right end (in FIG. 6) of the shaking frame 232 is shaken horizontally and back and forth by the eccentric member 234. This motion is transferred to the plunger 220 and forces the plunger 220 to reciprocate horizontally. [100] Meantime, during the grinding process, the tension of the film grinding material
  • the film grinding material 202 which is fed by the feeding roller 204 and collected by the collecting roller 206, is controlled by the tension-control member 240. That is, the film grinding material 202 is provided to the grinding head 210, and pushed by the control pendulum 244. Pushing force applied by the control pendulum 244 controls the tension of the film grinding material 202 provided to the grinding head 210.
  • the film grinding material 202 provided from the feeding roller 204 sequentially passes through the supporting roller 208 and the upper guide roller 224, moves along the feeding groove 300 of the grinding head 210, and arrives at the contact member 330 of the grinding head 210.
  • the film grinding material 202 processes the inner surface of the object "W"
  • the film grinding material 202 is guided along the collecting groove 302 of the grinding head 210, sequentially passes through the lower guide rollers 224' and the lower supporting roller 208', and is wound around the collecting roller 206 via the film transfer member 270.
  • the cylinder- shaped grinding head is inserted into the rotating object to perform the grinding operation. So, the inner surface grinding operation is performed more efficiently than a related art the construction and the process accuracy improves.
  • the grinding operation can be automatically performed. That is, the rotation of the object and movement of the inner surface grinder are automatically performed, which improves the efficiency of the process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

An inner surface super-finishing apparatus includes: an inner surface grinder (200) including: a film grinding material (202) grinding a surface of the object; a feeding roller (204) for feeding the film grinding material (202); a collecting roller (206) for collecting the film grinding material (202) used for grinding the object; supporting rollers (208) and (208') for supporting the film grinding material (202); a grinding head (210) protruding to one side and supporting the film grinding material (202) such that the film grinding material (202) contacts an inner surface of the object; a plunger (220) for supporting the grinding head (210); and a shaking member (230) installed on a right side of the plunger (220), for allowing the plunger (220) to reciprocate in a predetermined interval; a horizontal transferring member (110) for forcing horizontal movement of the inner surface grinder (200); a back- and- forth transferring member (130) for forcing back- and- forth movement of the inner surface grinder (200); and an object supporting member (280) installed on one side of the inner surface grinder (200), for supporting and rotating the object (W).

Description

Description
THE INTERIOR SUPER-FINISHING DEVICE AND METHOD FOR CONTROLLING THEREOF
Technical Field
[1] The present invention relates to a polishing apparatus, and more particularly, to an inner surface super-finishing apparatus for finishing automatically the inner surface of objects and a method for controlling the same.
Background Art [2] Generally, polishing is a processing method for improving quality of an object by grinding and polishing the object using a material of hard grains or hard powder. [3] A related art polishing process is performed using grindstones. Processing methods using grindstone particles are generically known as a grindstone particle process. [4] That is, referring to FIG. 1, a related art polishing apparatus includes a motor (not shown) and a circular grindstone 20 mounted on a rotational shaft 10 of the motor and rotating together with the motor. Therefore, a user directly holds an object 30 with his hands, and has the object 30 contact a peripheral surface of the grindstone in order to perform grinding. [5] As described above, when a user has the object 30 directly contact the grindstone 20 to perform the grinding, it is difficult to perform precise grinding, and a safety accident may occur. [6] Also, according to the related art process, outer surface grinding can be performed, but inner surface grinding cannot be performed.
Disclosure of Invention
Technical Problem [7] An object of the present invention is to provide an inner surface super-finishing apparatusthat grinds automatically an inner surface of an object. [8] Another object of the present invention is to provide a control method of an inner surface super- finishing apparatus that grinds automatically an inner surface of an object.
Technical Solution
[9] To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, there is provided an inner surface super-finishing apparatus including: an inner surface grinder including: a film grinding material formed in a film type, for directly contacting an object, and grinding a surface of the object; a feeding roller for feeding the film grinding material; a collecting roller installed on one side of the feeding roller, for collecting the film grinding material used for grinding the object; supporting rollers for supporting the film grinding material provided from the feeding roller to the collecting roller; a grinding head protruding to one side to support the film grinding material such that the film grinding material contacts an inner surface of the object; a plunger for supporting the grinding head; and a shaking member installed on a right side of the plunger, for allowing the plunger to reciprocate a predetermined interval; a horizontal transferring member for forcing horizontal movement of the inner surface grinder; a back-and-forth transferring member for forcing back-and-forth movement of the inner surface grinder; and an object supporting member installed on one side of the inner surface grinder, for supporting and rotating the object. [10] According to another aspect of the present invention, there is provided an inner surface super-finishing apparatus comprising an inner surface grinder 200 including: a film grinding material 202 formed in a film type, for directly contacting an object "W", and grinding a surface of the object; a feeding roller 204 for feeding the film grinding material; a collecting roller 206 installed on one side of the feeding roller 204, for collecting the film grinding material used for grinding the object "W"; supporting rollers 208 and 208' for supporting the film grinding material 202 provided from the feeding roller 204 to the collecting roller 206; a grinding head 210 protruding to one side to support the film grinding material 202 such that the film grinding material 202 contacts an inner surface of the object "W"; a plunger 220 for supporting the grinding head 210; and a shaking member 230 installed on a right side of the plunger 220, for allowing the plunger 220 to reciprocate in a predetermined interval.
Advantageous Effects
[11] According to the present invention, a cylinder type grinding head is inserted into a rotating object to perform the grinding. So, the inner surface grinding process is done more efficiently than a related art constitution, and a process accuracy is improved.
[12] Besides, in an inner surface super- finishing apparatus and a method for controlling the same according to the present invention, the grinding process can be automatically performed. That is, the rotation of the object and movement of the inner surface grinder are automatically performed, which improves the efficiency of the work. Brief Description of the Drawings
[13] FIG. 1 is a perspective view illustrating a use state of a grinder according to the related art;
[14] FIG. 2 is a perspective view illustrating an inner surface super-finishing apparatus according to a preferred embodiment of the present invention;
[15] FIG. 3 is a perspective view illustrating an inner surface grinder according to the present invention; [16] FIGS. 4 and 5 are a front view and a rear side view illustrating a grinding head, which is a principal member according to an embodiment of the present invention;
[17] FIG. 6 is a front view illustrating a inner constitution of a shaking member according to an embodiment of the present invention; and
[18] FIG. 7 is a schematic block diagram illustrating a control system and method of an inner surface super-finishing apparatus according to the present invention. Best Mode for Carrying Out the Invention
[19] To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, there is provided an inner surface super-finishing apparatus including:
[20] an inner surface grinder including: a film grinding material formed in a film type, for directly contacting an object, and grinding a surface of the object; a feeding roller for feeding the film grinding material; a collecting roller installed on one side of the feeding roller, for collecting the film grinding material used for grinding the object; supporting rollers for supporting the film grinding material provided from the feeding roller to the collecting roller; a grinding head protruding to one side to support the film grinding material such that the film grinding material contacts an inner surface of the object; a plunger for supporting the grinding head; and a shaking member installed on a right side of the plunger, for allowing the plunger to reciprocate a predetermined interval; a horizontal transferring member for forcing horizontal movement of the inner surface grinder; a back-and-forth transferring member for forcing back-and-forth movement of the inner surface grinder; and an object supporting member installed on one side of the inner surface grinder, for supporting and rotating the object.
[21] The horizontal transferring member includes: a couple of horizontal guiders re- spectivelyprovided to an upper front end and an upper rear end of the support die for supporting the inner surface grinder, and installed horizontally; horizontal rails installed on an upper surface of the couple of horizontal guiders; a horizontal screw provided long horizontally between the couple of horizontal guiders to force horizontal movement of the inner surface grinder; and a horizontal motor installed on one side of the horizontal screw, for providing torque to the horizontal screw.
[22] The back-and-forth transferring member includes: back-and-forth rails formed back and forth at a left end and a right end of a movement die; a back-and-forth screw provided on an inner surface of the movement die, for forcing the inner surface grinder to move back and forth; and a back-and-forth motor installed at one end of the back- and-forth screw, for rotating the back-and-forth screw.
[23] The object supporting member includes: a chuck for holding the object "W"; and a motor assembly is provided to one end of the chuck, for rotating the chuck. [24] Also, an inner surface super-finishing apparatus according to the present invention, comprising an inner surface grinder including: a film grinding material formed in a film type, for directly contacting an object, and grinding a surface of the object; a feeding roller for feeding the film grinding material; a collecting roller installed on one side of the feeding roller, for collecting the film grinding material used for grinding the object; supporting rollers for supporting the film grinding material provided from the feeding roller to the collecting roller; a grinding head protruding to one side to support the film grinding material such that the film grinding material contacts an inner surface of the object; a plunger for supporting the grinding head; and a shaking member installed on a right side of the plunger, for allowing the plunger to reciprocate a predetermined interval.
[25] A tension-control member provided to the end of the feeding roller, for controlling the tension of the film grinding material.
[26] The tension-control member includes: a control hinge protruding from a front side of the inner surface grinder; a control pendulum provided to be rotatable around the control hinge; and a contact roller protruding from one side of the control pendulum and directly contacting the film grinding material.
[27] The plunger includes: a body provided to be movable horizontally; a couple of guide rollers provided to the front side of the body; and a fixing key for fixing the grinding head.
[28] One end of a finishing-oil hose for guiding finishing oil to the grinding head, is connected to the fixing key, and a passage for guiding finishing oil provided through the finishing-oil hose to the grinding head, is formed in the fixing key.
[29] A feeding groove for feeding the film grinding material and a collecting groove for collecting the film grinding material are formed in one side of the grinding head.
[30] A key face contacting the one side of the fixing key is formed on the one side of the grinding head.
[31] A contact member for allowing the film grinding material to stick on the inner surface of the object, is further provided to a front end of the grinding head.
[32] Meanwhile, a method for controlling an inner surface super-finishing apparatus, the method includes: moving an inner surface grinder back and forth to allow a position of a grinding head and a position of an object to correspond to each other; putting and withdrawing a front end of the grinding head to and from an inside of the object, respectively; rotating the object; providing the grinding head with finishing oil; reciprocating the plunger including the grinding head horizontally.
[33] The reciprocating of the plunger includes reciprocating the grinding head horizontally when the inner surface of the object is processed by the film grinding material. [34] According to the inner surface super-finishing apparatus and the method for controlling the same with the constitution according to the present invention, the inner surface grinding process is done efficiently. Mode for the Invention
[35] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[36] FIGS. 1 and 2 are perspective views illustrating an inner surface super-finishing apparatus and an inner surface grinder according to the present invention, respectively.
[37] Referring to FIGS. 1 and 2, a support die 100 is provided to a lower portion of the inner surface super-finishing apparatus according to the present invention, the support die is formed at a predetermined height to support a lot of parts including an inner surface grinder 200, which will be described below. An adjusting screw 102 whose height is adjustable is provided at a lower end of the support die 100.
[38] The support die 100 is formed to have approximately a rectangular shape, and a die guider 104 is formed at a predetermined height along an upper periphery of the support die 100. the die guider 104 prevents a by-product like finishing oil, which will be described below, from leaking out to the outside.
[39] A horizontal carrier 110 for moving the inner surface grinder 200 horizontally is provided on an upper surface of the support die 100. the horizontal carrier 110 includes horizontal guiders 112, horizontal rails 114, a horizontal screw 116, and a horizontal motor 118.
[40] The horizontal guiders 112 are provided in a pair on the upper surface of the support die 100. That is, the horizontal guiders 112 are formed long horizontally at an upper front end and an upper rear end of the support die 100 to guide horizontal movement of the inner surface grinder 200.
[41] The horizontal rail 114 is provided on an upper surface of the horizontal guider 112. the horizontal rail 114 is formed at the same length as that of the horizontal guider 112 to directly contact a lower surface of a movement die 120 supporting the inner surface grinder 200. Therefore, when the movement die 120 slides on the horizontal rail 114 horizontally, the inner surface grinder 200 moves horizontally.
[42] The horizontal screws 116 are provided horizontally long between the couple of horizontal guiders 112. the horizontal screw 116 moves relatively to a horizontal nut (not shown) mounted in the movement die 120, to force the movement die 120 and the inner surface grinder 200 to move horizontally. Here, an outer surface of the horizontal screw 116 is threaded.
[43] The horizontal motor 118 is mounted at a right end of the horizontal screw 116 to provide torque to the horizontal screw 116. Therefore, when the horizontal motor 118 is rotated by power from outside, the power is transferred to the horizontal screw 116 to rotate the screw.
[44] The movement die 120 is installed on the support die 100. That is, the rectangular movement die 120 is provided on the upper surface of the horizontal guider 112 and the horizontal screw 116. The lower rear portion and front portion of the movement die 120 contact the horizontal rail 114 and the horizontal screw 116, respectively.
[45] A back-and-forth-movement member 130 for forcing back- and-force-movement of the inner surface grinder 200 is provided on an upper surface of the movement die 120. the back-and-forth-movement member 130 includes back- and- forth rails 132, a back- and-forth screw 134, and a back-and-forth motor (not shown).
[46] The back-and-forth rails 132 are formed long back-and forth at the left end and the right end of the movement die 120 to allow a main machine basement 140 to slide back and forth.
[47] The back-and-forth screw 134 is provided on an inner side of the movement die
120. the back-and-forth screw 134 corresponds to the horizontal screw 116 and forces the basement of main machine basement 140 and the inner surface grinder 200 to move back and forth.
[48] Therefore, like the horizontal screw 116, the back-and-forth screw 134 is formed to have a shape corresponding to that of the back-and-forth nut (not shown) formed at a bottom of a main machine basement 140, and moves relatively to the back-and-forth nut (not shown). That is, a male screw is formed in an outer surface of the back- and-forth screw 134 to move relatively to a female screw formed in the back-and-forth nut.
[49] Meanwhile, though not shown, the back-and-forth motor is provided at a rear end of the back-and-forth screw 134. Like the horizontal motor 118, the back-and-forth motor (not shown) generates power using power applied from the outside to rotate the back- and-forth screw 134.
[50] The main machine basement 140 is installed above the movement die 120. The main machine basement 140 is flat and supports the inner surface grinder 200. the bottom of the main machine basement 140 contacts the back-and-forth rails 132 and the back-and-forth screw 134.
[51] The inner surface grinder 200 is provided on an upper side of the main machine basement 140. the inner surface grinder 200 has a quadrangular box shape, on which parts for directly processing the inner surface are installed.
[52] Referring to FIG. 3, the inner surface grinder 200 includes a film grinding material
202 formed in a film type, for directly contacting the object "W", and grinding a surface of the object "W", a feeding roller 204 for feeding the film grinding material 202, a collecting roller 206 installed at the bottom of the feeding roller 204, for collecting the film grinding material used for grinding the object "W", supporting rollers 208 and 208' for supporting the film grinding material 202 provided from the feeding roller 204 to the collecting roller 206, a grinding head 210 protruding to one side (left side) and supporting the film grinding material 202 such that the film grinding material 202 contacts an inner surface of the object "W", a plunger 220 for supporting the grinding head 210 and a shaking member 230 installed on a right side of the plunger 220, for allowing the plunger 220 to reciprocate a predetermined interval horizontally.
[53] At least one couple of the supporting rollers 208 and 208' are provided at the left side of the feeding roller 204 and the collecting roller 206. That is, an upper supporting roller 208 is provided at the left side of the feeding roller 204 to guide the film grinding material 202 from the feeding roller 204, and a lower supporting roller 208' is installed under the upper supporting roller 208 to guide the film grinding material 202 to the collecting roller 206. An additional supporting roller can be also added.
[54] A tension-control member 240 is further provided between the upper supporting roller 208 and the feeding roller 204. The tension-control member 240 controlling the tension of the film grinding material 202 is further provided at the end of the feeding roller 204. That is, it controls the tension of the film grinding material 202 appropriately for a swift grinding process.
[55] The tension-control member 240 includes a control hinge 242 protruding from the face of the inner surface grinder 200, a control pendulum 244 provided in a predetermined length, for rotating around the control hinge 242, and a contact roller 246 protruding from the front side of the control pendulum 244 to directly contact the film grinding material 202.
[56] As illustrated, one end of the control pendulum 244(a left end in FIG. 3) is rotatably coupled at the control hinge 242. The contact roller 246 is circular and the film grinding material 202 contacts a peripheral surface of the contact roller 246. The contact roller 246 is fixed or rotatably coupled at the control pendulum 244.
[57] A spring 248 is further provided to the control pendulum 244 and predetermined elasticity force of the spring 248 pulls the control pendulum 244 downward so that the film grinding material 202 maintains predetermined tension.
[58] A stop sensor 250 is further provided at a right side of the control pendulum 244.
The stop sensor 250 detects a rotation angle of the control pendulum 244 to stop operation of the inner surface grinder 200. That is, when the tension of the film grinding material 202 is excessively increased and right end of the control pendulum 244 is close to the stop sensor 250, the stop sensor 250 stops the inner surface grinder 200.
[59] The plunger 220 is provided at a front left end of the inner surface grinder 200. The plunger 220 for supporting the grinding head 210 includes a body 222 installed to be movable horizontally, a couple of guide rollers 224 and 224' provided on the front face of the body 222, and a fixing key 226 for fixing the grinding head 210.
[60] A couple of the guide rollers 224 and 224' include an upper guide roller 224 for guiding the film grinding material 202 from the feeding roller 204, to the grinding head 210, and a lower guide roller 224 for guiding the film grinding material 202 from the grinding head 210, to the collecting roller 206. As illustrated, a size of the lower guide roller 224' corresponds to a size of the upper guide rollers 224, and the lower guide roller 224' is spaced a predetermined distance below the upper guide rollers 224.
[61] A couple of the guide rollers 224 and 224' are fixed or rotatably installed on the front side of the plunger 220. It is desirable that a couple of the guide rollers 224 and 224' are rotatably installed.
[62] The fixing key 226 is formed to have a predetermined length horizontally, and fixes a right end of the grinding head 210. A side-section of the fixing key 226 is formed to have a trapezoidal shape because a height of a rear end of the fixing key 226 is higher than a height of a front end of the fixing key 226. Therefore, the fixing key 226 is coupled on the plunger 220 by two fixing screws 226'.
[63] One end of a finishing-oil hose 228 is connected to the fixing key 226. The finishing-oil hose 228 provides the grinding head 210 with finishing oil. One end of the finishing-oil hose 228 is connected to a front side of the inner surface grinder 200 and the other end is connected to the fixing key 226. Therefore, though not shown, a passage for guiding finishing oil provided through the finishing-oil hose 228 to the grinding head 210, is formed in the fixing key 226.
[64] The grinding head 210 has a cylinder shape, is installed on a left end of the inner surface grinder 200 to protrude leftward. That is, as illustrated, a left side of the grinding head 210 protrudes leftward from the inner surface grinder 200. Therefore, the film grinding material 202 is wound around a left end of the grinding head 210 to grind the inner surface of the object "W". A construction of the grinding head 210 will be described below in detail.
[65] Guide pipes 260 allow the plunger 220 to move horizontally. In more detail, the cylindrical guide pipes are inserted horizontally into an upper end and a lower end of the plunger 220. Therefore, the guide pipes 260 allow the plunger 220 to move horizontally, and both horizontal ends of the guide pipes 260 are fixed at the front side of the inner surface grinder 200 by fixing members 262.
[66] The shaking member 230 is provided on a right side of the plunger 220. The shaking member 230 is connected to the right end of the plunger 220 and an eccentric member provided in the shaking member 230, forces the plunger 220 and the grinding head 210 to reciprocate horizontally within a predetermined interval. That is, the eccentric member converts a rotational motion of the shaking motor (not shown) into a horizontal linear motion. A construction of the shaking member 230 will be described below in detail.
[67] A film transfer member 270 is installed between the lower supporting roller 208' and the collecting roller 208. The film transfer member 270 for feeding and collecting the film grinding material 202 with constant speed, has two gears engaged with each other. That is, the film transfer member 270 rotates with the two gears engaged with each other to pull the film grinding material 202 by one step. So it is desirable that at least one of the gears should be rotated by a step motor (not shown).
[68] An object supporting member 280 for supporting and rotating the object "W" is further provided on an upper side of the supporting die 100. The object supporting member 280 is provided at the left end of the supporting die 100, and is spaced upward a predetermined distance from an upper surface of the supporting die 100 by an object supporting die 280'.
[69] The object supporting member 280 includes a chuck 282 for holding the object "W" and a motor assembly 284 for rotating the chuck 282. The motor assembly 284 is spaced a predetermined distance from the chuck 282 and torque generated by the motor assembly 284 is transferred to the chuck 282 by a belt (not shown). Since a construction of the chuck 282 is generally known in the art, detailed description thereof will be omitted.
[70] A cover 286 is further provided at an upper end of the object supporting member
280. The cover 286 is rotatably installed to prevent finishing oil supplied via the left end of the grinding head 210 from splashing. It is desirable that the cover 286 is transparent so that a process performed in the cover can be visible to the outside.
[71] A control panel 290 is further provided to a front of the supporting die 100. The control panel 290 is supported by a panel supporting bar 292 that protrudes to the front from the supporting die 100 and then is bent upward. The control panel 290 includes display panel 294 for displaying a operational status of the inner surface grinder 200, and buttons 296 for controlling and setting the operational status of the inner surface grinder 200.
[72] FIG. 4 and FIG. 5 illustrate a construction of the grinding head 210 in more detail.
That is, FIG. 4 is a front view illustrating the grinding head 210 and FIG. 5 is a rear view illustrating the grinding head 210.
[73] Referring to FIG. 4 and FIG. 5, the grinding head 210 has a cylindrical shape on the whole and a feeding groove 300 and a collecting groove 302 are formed horizontally long in the front side of the grinding head 210. The feeding groove 300 and the collecting groove 302 are narrow in vertical width and divided from each other by a divider 304 having a thin flat sheet shape. [74] The feeding groove 300 is formed on an upper side of the divider 304 to guide the film grinding material 202 provided by the feeding roller 204 to a front end (left end in FIG. 4) of the grinding head 210 from a right end of the grinding head 210.
[75] The collecting groove 302 is formed on a lower side of the divider 304 to guide the film grinding material 202 to the right end of the grinding head 210 that has passed through the front end (left end in FIG. 4) of the grinding head 210.
[76] An end portion of the head 310 formed at the front end (left end in FIG. 4) of the grinding head 210, has a smaller diameter than that of a middle portion of the grinding head 210. A guide surface 312 is inclined at a right end (in FIG. 4) of the end portion of the head 310. The film grinding material 202 is wound around the guide surface 312.
[77] Referring to FIG. 4, a couple of discharge ports 314 are provided in the guide surface 312. The discharge ports 314 for providing the front end of the grinding head 210 with the finishing oil is formed to communicate with the finishing oil passage (not shown).
[78] Therefore, the finishing oil provided through the finishing-oil hose 228 is provided to the front end of the grinding head 210 through the discharge ports 314. The finishing oil provided through the discharge ports 314 is supplied to a portion between the film grinding material 202 and the guide surface 312 formed at the front end of the grinding head 210 to form a lubricant layer.
[79] A key face 320 is formed on an upper side of the grinding head 210. The key face
320 formed flat on a right portion (in FIG. 4) of the grinding head 210. Therefore, a bottom of the fixing key 226 contacts the key face 320. It means the grinding head 210 is fixed on the plunger 220.
[80] A contact member 330 is further provided to the front end (left end in FIG. 4 and right end in FIG. 5) of the grinding head 210. In more detail, the contact member 330 having a predetermined size is provided to the rear side (front side in FIG. 5) of the guide surface 312. the contact member 330 for sticking the film grinding material 202 on the inner surface of the object "W" is formed of an elastic and abrasion-resistant material.
[81] In the embodiment, the contact member 330 is made of urethane and a surface of the contact member 330 is higher than a surface of the grinding head 210 by 2.5 mm. In detail, the contact member 330 has a roller shape and is fixedly mounted in a front end of the grinding head 210. The surface of the contact member 330 is higher than the surface of the grinding head 210 by 2.5 mm.
[82] Therefore, the film grinding material 202 on the contact member 330 contacts directly the inner surface of the object "W" for grinding process.
[83] FIG. 6 illustrates an inner construction of a shaking member 230 according to an embodiment.
[84] Referring to FIG. 6, the shaking member 230 includes a shaking frame 232 linked with the plunger 220 and an eccentric member 234 forcing the shaking frame 232 to shake.
[85] A left end of the shaking frame 232 is linked with a right end of the body 222 of the plunger 220 by a link shaft 236, and a circular contact hole 238 is formed to pass through the right portion of the shaking frame 232.
[86] The eccentric member 234 has two circular plates of different sizes. That is, the eccentric member 234 has a circular center plate 234' serving as a center of rotation and a circular contact plate 234" having a bigger diameter than that of the circular center plate 234'. The center plate 234' and the contact plate 234" are fixed with each other or are integrally formed to be rotated together around a center "O" of the center plate 234'.
[87] The contact plate 234" directly contacts the shaking frame 232. That is, the contact plate 234" is inserted into an inside of the contact hole 238 formed in the shaking frame 232. Therefore, an outer diameter of the contact plate 234" has a size corresponding to that of an inner diameter of the contact hole 238. In more detail, the outer diameter of the contact plate 234" is slightly smaller than the inner diameter of the contact hole 238 to allow an outer surface of the contact plate 234" to slide on an inner surface of the contact hole 238 smoothly.
[88] The center O of the center plate 234' is separated a distance 'd' from a O' of the contact plate 234". Therefore, as the eccentric member 234 rotates, the plunger 220 moves by '2d' horizontally. That is, the plunger 220 is a linear horizontal motion device and the shaking frame 232 is linked with the plunger 220 by a link shaft 236. So, the rotation of the eccentric member 234 moves the plunger 220 horizontally.
[89] An operation of the inner surface super-finishing apparatus having the above- described construction and a method of controlling the inner surface super- finishing apparatus are described below.
[90] When power is applied to the inner surface super-finishing apparatus, a user mounts the object "W" in the chuck 282 and manipulates buttons 296 on the control panel 290 to set an operating condition of the inner surface super-finishing apparatus. Of course, at this time, it is possible to allow the inner surface super-finishing apparatus to operate automatically or manually, step by step.
[91] Descriptions will be made using an example where the inner surface grinder 200 is set to operate automatically.
[92] Referring to FIG. 7, the control method of the inner surface super-finishing apparatus according to the present invention includes moving the inner surface grinder 200 back and forth to allow a position of the grinding head 210 to correspond to a position of the object "W" (S400), putting and withdrawing the front end(left end) of the grinding head 210 to and from an inside of the object "W", respectively (S410), rotating the object "W" by rotating the chuck 282 (S420), providing the grinding head 210 with finishing oil (S430) through the finishing-oil hose 228, and reciprocating the plunger 220 including the grinding head 210 horizontally (S440).
[93] The above-described operations are performed sequentially, in groups, or simultaneously.
[94] In more detail, the operation S400 of moving the inner surface grinder 200 back and forth using the back- and- forth transferring member 130, allows the main machine basement 140 to be moved back and forth by the back-and-forth motor (not shown).
[95] In the operation S410, the inner surface grinder 200 is moved horizontally by the horizontal transferring member 110. That is, during the grinding process, the inner surface grinder 200 moves to left and the grinding head 210 should contact the object "W". After the grinding process, the inner surface grinder 200 moves to right and the grinding head 210 should be separated from the object "W".
[96] Through the operations S400 and S410, the object "W" and the grinding head 210 are aligned at a predetermined position. That is, through the operations S400 and S410, the inner surface grinder 200 moves and the film grinding material 202 contacting the contact member 330 of the grinding head 210, contacts the inner surface of the object "W", so that the grinding process can be performed.
[97] The operation S420 of rotating the chuck 282 holding the object "W" using the object supporting member 280, can be performed by rotating the motor assembly 284. That is, when the motor assembly is rotated by power applied from the outside, corresponding torque is transmitted to the chuck 282 via belt (not shown) and thus rotates the chuck 282. So, the object "W" installed in the chuck 282 is rotated.
[98] The operation S430 of providing, through the finishing-oil hose 228, the front end of the grinding head 210 with the finishing oil, is performed when the object "W" is processed by the grinding head 210. Therefore, the finishing oil provided to the front end of the grinding head 210 cools down the grinding head 210 and the film grinding material 202, simultaneously, removes foreign substances for a more efficient grinding process, and hasrust-resistant function and cleaning function.
[99] The operation S440 of reciprocating the grinding head 210 horizontally when the inner surface of the object "W" is processed using the film grinding material 202, allows the object "W" to be processed more efficiently. The operation S440 is performed by the shaking member 230 described in the above. That is, a right end (in FIG. 6) of the shaking frame 232 is shaken horizontally and back and forth by the eccentric member 234. This motion is transferred to the plunger 220 and forces the plunger 220 to reciprocate horizontally. [100] Meantime, during the grinding process, the tension of the film grinding material
202 which is fed by the feeding roller 204 and collected by the collecting roller 206, is controlled by the tension-control member 240. That is, the film grinding material 202 is provided to the grinding head 210, and pushed by the control pendulum 244. Pushing force applied by the control pendulum 244 controls the tension of the film grinding material 202 provided to the grinding head 210.
[101] Therefore, when the grinding head 210 is reciprocated horizontally by the shaking member 230, the tension of the film grinding material 202 is changed. So, the control pendulum 244 rotating clockwise or counterclockwise around the control hinge 242 located at the left end, controls the tension of the film grinding material 202. Also, when the tension of the film grinding material 202 abnormally increases due to disorder of the apparatus and the right end (in FIG. 2 or FIG.3) of the control pendulum 244 approaches closely the stop sensor 250, a corresponding signal is sent to a controller (not shown) to stop the grinding process.
[102] Besides, the film grinding material 202 provided from the feeding roller 204 sequentially passes through the supporting roller 208 and the upper guide roller 224, moves along the feeding groove 300 of the grinding head 210, and arrives at the contact member 330 of the grinding head 210. After the film grinding material 202 processes the inner surface of the object "W", the film grinding material 202 is guided along the collecting groove 302 of the grinding head 210, sequentially passes through the lower guide rollers 224' and the lower supporting roller 208', and is wound around the collecting roller 206 via the film transfer member 270.
[103] When the grinding operation is completed according to the process, the inner surface grinder 200 returns to the right side, the grinding head 210 is separated from the object "W", and rotation of the chuck 282 is stopped.
[104] While the present invention has been described and illustrated herein with reference to the preferred embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made therein without departing from the spirit and scope of the invention. Thus, it is intended that the present invention covers the modifications and variations of this invention that come within the scope of the appended claims and their equivalents. Industrial Applicability
[105] According to the present invention, the cylinder- shaped grinding head is inserted into the rotating object to perform the grinding operation. So, the inner surface grinding operation is performed more efficiently than a related art the construction and the process accuracy improves.
[106] Besides, in the inner surface super-finishing apparatus and the method for controlling the same according to the present invention, the grinding operation can be automatically performed. That is, the rotation of the object and movement of the inner surface grinder are automatically performed, which improves the efficiency of the process.

Claims

Claims
[1] An inner surface super-finishing apparatus comprising: an inner surface grinder (200) including: a film grinding material (202) formed in a film type, for directly contacting an object(W), and grinding a surface of the object; a feeding roller (204) for feeding the film grinding material (202); a collecting roller (206) installed on one side of the feeding roller (204), for collecting the film grinding material used for grinding the object (W); supporting rollers (208) and (208') for supporting the film grinding material
(202) provided from the feeding roller (204) to the collecting roller (206); a grinding head (210) protruding to one side to support the film grinding material
(202) such that the film grinding material (202) contacts an inner surface of the object (W); a plunger (220) for supporting the grinding head (210); and a shaking member (230) installed on a right side of the plunger (220), for allowing the plunger (220) to reciprocate a predetermined interval; a horizontal transferring member (110) for forcing horizontal movement of the inner surface grinder (200); a back- and- forth transferring member (130) for forcing back-and-forth movement of the inner surface grinder (200); and an object supporting member (280) installed on one side of the inner surface grinder (200), for supporting and rotating the object (W). [2] The apparatus according to claim 1, wherein the horizontal transferring member
(110) comprises: a couple of horizontal guiders (112) respectivelyprovided to an upper front end and an upper rear end of the support die (100) for supporting the inner surface grinder (200), and installed horizontally; horizontal rails (114) installed on an upper surface of the couple of horizontal guiders (112); a horizontal screw (116) provided long horizontally between the couple of horizontal guiders (112) to force horizontal movement of the inner surface grinder (200); and a horizontal motor (118) installed on one side of the horizontal screw (116), for providing torque to the horizontal screw (116). [3] The apparatus according to claim 1, wherein the back-and-forth transferring member (130) comprises: back-and-forth rails (132) formed back and forth at a left end and a right end of a movement die (120); a back- and- forth screw (134) provided on an inner surface of the movement die
(120), for forcing the inner surface grinder (200) to move back and forth; and a back- and- forth motor installed at one end of the back- and- forth screw (134), for rotating the back-and-forth screw (134). [4] The apparatus according to claim 1, wherein the object supporting member (280) comprises: a chuck (282) for holding the object (W); and a motor assembly (284) provided to one end of the chuck (282), for rotating the chuck (282). [5] The apparatus according to claim 1, further comprising a tension-control member
(240) provided to the end of the feeding roller (204), for controlling the tension of the film grinding material (202). [6] An inner surface super-finishing apparatus comprising: the inner surface grinder (200) including: the film grinding material (202) formed in a film type, for directly contacting the object (W), and grinding a surface of the object (W); the feeding roller (204) for feeding the film grinding material; the collecting roller (206) installed on one side of the feeding roller (204), for collecting the film grinding material used for grinding the object (W); the supporting rollers (208) and (208') for supporting the film grinding material
(202) provided from the feeding roller (204) to the collecting roller (206); the grinding head (210) protruding to one side to support the film grinding material (202) such that the film grinding material (202) contacts an inner surface of the object (W); the plunger (220) for supporting the grinding head (210); and the shaking member (230) installed on a right side of the plunger (220), for allowing the plunger (220) to reciprocate a predetermined interval. [7] The apparatus according to claim 6, further comprising a tension-control member
(240) provided to the end of the feeding roller (204), for controlling the tension of the film grinding material (202). [8] The apparatus according to claim 6, wherein the tension-control member (240) comprises: a control hinge (242) protruding from a front side of the inner surface grinder
(200); a control pendulum (244) provided to be rotatable around the control hinge
(242); and a contact roller (246) protruding from one side of the control pendulum (244) and directly contacting the film grinding material (202). [9] The apparatus according to claim 6, wherein the plunger (220) comprises: a body (222) provided to be movable horizontally; a couple of guide rollers (224) and (224') provided on a front side of the body
(222); and a fixing key (226) for fixing the grinding head (210). [10] The apparatus according to claim 9, wherein one end of a finishing-oil hose
(228) for guiding finishing oil to the grinding head (210), is connected to the fixing key (226), and a passage for guiding finishing oil provided through the finishing-oil hose (228) to the grinding head (210) is formed in the fixing key
(226). [11] The apparatus according to claim 10, wherein a feeding groove (300) for feeding the film grinding material (202) and a collecting groove (302) for collecting the film grinding material (202) are formed in one side of the grinding head (210). [12] The apparatus according to claim 11, wherein a key face (320) contacting one side of the fixing key (226) is formed on the one side of the grinding head (210). [13] The apparatus according to claim 12, wherein a contact member (330) for allowing the film grinding material (202) to stick on the inner surface of the object (W) is further provided to a front end of the grinding head (210). [14] A method for controlling an inner surface super- finishing apparatus, the method comprising: moving an inner surface grinder (200) back and forth to allow a position of a grinding head (210) and a position of an object (W) to correspond to each other
(S400); putting and withdrawing a front end of the grinding head (210) to and from an inside of the object (W), respectively (S410); rotating the object (W)(S420); providing the grinding head (210) with finishing oil (S430); and horizontally reciprocating a plunger (220) mounting the grinding head (210) thereon (S440). [15] The method according to claim 14, wherein the reciprocating (S440) of the plunger (220) comprises reciprocating the grinding head (210) horizontally when an inner surface of the object (W) is processed by a film grinding material (202).
PCT/KR2006/003241 2006-06-14 2006-08-18 The interior super-finishing device and method for controlling thereof WO2007145396A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020060053425A KR100819178B1 (en) 2006-06-14 2006-06-14 Inner Super Finishing Device and its Control System
KR10-2006-0053425 2006-06-14

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CN105690197A (en) * 2016-02-03 2016-06-22 中冶陕压重工设备有限公司 Method for grinding inner hole of part on horizontal lathe
CN114571364A (en) * 2020-12-01 2022-06-03 Hb技术有限公司 Defect polishing apparatus using polishing belt
CN115194165A (en) * 2022-09-14 2022-10-18 四川泽丰锂能新能源科技有限公司 Low-temperature brittle metal powder grinding device

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KR102613480B1 (en) * 2021-10-29 2023-12-14 일광금속 유한책임회사 Super finishin apparatus
KR102443327B1 (en) * 2022-03-15 2022-09-15 주식회사 아이텔 Fully automatic polishing machine considering convenience

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