CN114734337A - Six numerical control tool grinding machines of emery wheel anticollision - Google Patents
Six numerical control tool grinding machines of emery wheel anticollision Download PDFInfo
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- CN114734337A CN114734337A CN202210339105.4A CN202210339105A CN114734337A CN 114734337 A CN114734337 A CN 114734337A CN 202210339105 A CN202210339105 A CN 202210339105A CN 114734337 A CN114734337 A CN 114734337A
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- wall
- grinding wheel
- sleeve
- telescopic
- support rod
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- 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
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
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- 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
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
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- 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
- B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
- B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses a grinding wheel anti-collision six-axis numerical control tool grinding machine, and belongs to the field of grinding equipment. A six-axis numerical control tool grinding machine with anti-collision grinding wheels comprises the grinding wheels; the main shaft is a mounting seat of the grinding wheel, and a positioning hole is formed in the mounting surface; the positioning screw is a mounting piece of the grinding wheel; when the grinding wheel is installed, the threaded end of the positioning screw penetrates through the grinding wheel and extends into the positioning hole to be in threaded connection with the positioning hole; the protective sleeve is detachably sleeved on the periphery of the positioning screw, and the outer side sleeve wall of the protective sleeve is flexible and is abutted against the inner wall of the positioning hole; the inner cavity of the protective sleeve is filled with fluid and is provided with a plurality of supporting rod groups which are uniformly distributed around the axis of the protective sleeve; the support rod group has the capability of stretching and deforming in the axial direction of the support rod group; the grinding wheel has the advantages that when the grinding wheel is subjected to radial pressure, the screw and the main shaft are firmly attached and are not easy to shake.
Description
Technical Field
The invention belongs to the field of grinding equipment, and particularly relates to a grinding wheel anti-collision six-axis numerical control tool grinding machine.
Background
Grinding wheels are common grinding elements on tool grinders for grinding tools. Since the machining dimensional accuracy of the tool is higher than that of a general part, whether the grinding wheel is mounted in place or not determines the degree of machining dimensional accuracy of the tool.
The prior patent No. CN201911350287.X is an improved tool grinder in a grinding wheel fixing mode, which comprises a grinding head main shaft and a grinding wheel, wherein the grinding head main shaft comprises a large end shaft and a small end shaft; the grinding wheel comprises a grinding wheel base and a grinding wheel layer; the grinding wheel base is formed with a central hole and a plurality of eccentric step holes which are uniformly distributed on the circumference, eccentric pull rods are sleeved in the eccentric step holes, the pull rod of each eccentric pull rod is inserted in a corresponding pull rod insertion hole on the base, and the base is fixed on the large-end shaft; a pair of right-angled trapezoidal grooves are formed on the pull rod; threaded holes are formed in the outer wall of the base, and a rectangular through hole is formed between each threaded hole and the corresponding pull rod jack; a rectangular inserting block is sleeved in the rectangular through hole, and a first inclined surface of the rectangular inserting block is pressed against a second inclined surface of the right-angled trapezoidal groove; the outer end of the rectangular insert block is pressed against the stud, and the stud is screwed in the threaded hole.
In the prior art, an eccentric pull rod of a grinding wheel cannot be easily disengaged in the axial direction, but for a six-axis numerical control tool grinding machine, the stress direction during machining is changed a lot, especially the stress in the radial direction can enable a screw for mounting the grinding wheel to a main shaft to bear the shearing force, and after the screw bears long-term or sudden radial pressure, the screw is easily bent or the main shaft is damaged, so that the problems that the grinding wheel is not easy to take out and the service life of the grinding wheel or the main shaft is shortened are caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing a grinding wheel anti-collision six-axis numerical control tool grinding machine, which can realize the effect that a screw is firmly attached to a main shaft and is not easy to shake when a grinding wheel is subjected to radial pressure.
The invention relates to a six-axis numerical control tool grinding machine with anti-collision grinding wheels, which comprises
A grinding wheel;
the main shaft is a mounting seat of the grinding wheel, and a positioning hole is formed in the mounting surface;
the positioning screw is a mounting piece of the grinding wheel; when the grinding wheel is installed, the threaded end of the positioning screw penetrates through the grinding wheel and extends into the positioning hole to be in threaded connection with the positioning hole; and
the protective sleeve is detachably sleeved on the periphery of the positioning screw, and the outer side sleeve wall of the protective sleeve is flexible and is abutted against the inner wall of the positioning hole; the inner cavity of the protective sleeve is filled with fluid and is provided with a plurality of supporting rod groups which are uniformly distributed around the axis of the protective sleeve; the support rod group has the capability of stretching and deforming in the axial direction of the support rod group; the inner side end of the support rod group is a fixed end connected with the inner side sleeve wall of the protective sleeve, and the outer side end of the support rod group is a movable end directly or indirectly abutted against the outer side sleeve wall of the protective sleeve; in a buffer mode, the support rod groups have a shortened space in the axial direction of the support rod groups, and the axes of the support rod groups are not superposed with the axes of the protective sleeves; under the support mode, the self axial length of the support rod group has no shortened space, and the axis of each support rod group coincides with the axis of the protective sleeve.
As a further improvement of the invention, a partition board is arranged in the protective sleeve to divide the inner cavity of the protective sleeve into an inner chamber and an outer chamber; fluid communication within the inner and outer chambers; the support rod group is arranged in the inner chamber, and the movable end is always kept in butt joint with the partition plate; in the buffer mode, the partition plate and the outer sleeve wall keep a gap so that the outer chamber becomes a through chamber; in the support mode, at least part of the partition plate is attached to the outer sleeve wall so that the outer chamber is divided into a plurality of mutually partitioned chambers.
As a further improvement of the invention, the partition plate is provided with at least one damping hole; the inner and outer chambers exchange fluid through the orifice.
As a further improvement of the invention, the partition plate forms a plurality of sliding grooves which are uniformly distributed; the number of the sliding grooves is consistent with that of the support rod groups; the movable end of each support rod group is positioned in the corresponding sliding groove and is in sliding butt joint with the groove wall; the wall of the sliding groove comprises a telescopic wall, a rotating wall and a fixed wall which are sequentially connected end to end; the tangent line of the inner side sleeve wall at the fixed end of each support rod group is inclined with the corresponding rotating wall; the normal line of the inner side sleeve wall at the fixed end of each support rod group is parallel to the corresponding telescopic wall; the telescopic wall has the capability of telescopic deformation along the length direction of the telescopic wall close to the outer side sleeve wall side; the end of the telescopic wall far away from the rotating wall is connected with the fixed wall of the adjacent sliding groove; the end of the fixed wall far away from the rotating wall is connected with the telescopic wall of the adjacent sliding groove; in a buffer mode, the telescopic wall keeps a free state and a gap is reserved between the outer sleeve walls, the connecting end of the telescopic wall and the rotating wall is the near end of the rotating wall relative to the inner sleeve walls, the connecting end of the fixed wall and the rotating wall is the far end of the rotating wall relative to the inner sleeve walls, and the movable end of each support rod group is positioned at the far end of the rotating wall; in the supporting mode, the telescopic wall keeps an extension state and is abutted against the outer sleeve wall, and the connecting end of the telescopic wall and the rotating wall is switched to the far end of the rotating wall relative to the inner sleeve wall or the rotating wall is switched to be parallel to the tangent line of the inner sleeve wall corresponding to the fixed end.
As a further improvement of the invention, the support rod group comprises a main rod and an auxiliary rod; one end of the main rod is fixedly and rotatably connected with the inner side sleeve wall and is a fixed end; the auxiliary rod is connected in the main rod in a sliding mode and extends out of the other end of the main rod, a limiting structure is arranged between one end, located in the main rod, of the auxiliary rod and the inner wall of the main rod, one end, located outside the main rod, of the auxiliary rod is a round head, and the round head is a movable end; the diameter of the round head is larger than that of the main rod; the length of the auxiliary rod is less than that of the main rod; the main rod and the auxiliary rod are made of rigid materials.
As a further improvement of the invention, in the buffer mode, a gap is reserved between one end of the auxiliary rod, which is positioned in the main rod, and the limiting structure; in the supporting mode, the round head is abutted to the end, far away from the inner side wall sleeve, of the main rod.
As a further improvement of the invention, the telescopic wall comprises a rigid wall, a spring wall and a weight which are sequentially connected in an initial position; the rigid wall is made of rigid material; the elastic wall is made of elastic material; the mass of the weight is greater than that of the elastic wall, and the weight is connected with the rotating wall; in the buffering mode, the elastic wall is in a free state, and a gap is reserved between the weight and the outer sleeve wall; in the supporting mode, the elastic wall is in an extending state, and the weight is abutted against the outer sleeve wall and keeps sealing.
As a further improvement of the invention, a plurality of bearing blocks are fixedly arranged on the inner side of the outer sleeve wall; the number of the receiving blocks is consistent with that of the telescopic walls; the bearing block is positioned in the extension direction of the length of the telescopic wall; in the supporting mode, the telescopic wall is abutted against the bearing block, and the rotating wall is kept parallel to a tangent line of the inner sleeve wall corresponding to the fixed end.
As a further improvement of the invention, the fluid is a non-Newtonian fluid.
As a further development of the invention, the centre of gravity of the set of support rods is located on the round head.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the positioning screw is sleeved with the protective sleeve to be in contact with the main shaft, and the protective sleeve is filled with fluid, so that the positioning screw is not easy to collide with the inner wall of the main shaft when being installed in the main shaft.
When the grinding wheel is installed and starts to rotate, the rotation speed of the grinding wheel is gradually increased from small to large instead of rapidly reaching the set rotation speed, so that fluid in an outer chamber can flow into an inner chamber through a damping hole, the support rod group is changed from an extension state to a shortening state and is supported between an inner side sleeve wall and a rotating wall by adding the centrifugal force of the support rod group, the centrifugal force of the rotating wall and the centrifugal force of the telescopic wall, the support rod group is the shortest length and cannot be shortened any more, and the extension line of the support rod group in the length direction is superposed with the axis of the protective sleeve, so that a good supporting effect can be achieved on a positioning screw and a main shaft, preparation is made for grinding the grinding wheel under radial pressure, and the positioning screw cannot be easily shaped and bent.
In the supporting state, the rotating wall is abutted against the outer side sleeve wall and keeps sealed, so that a closed cavity is formed among the rotating wall, the fixed wall, the telescopic wall of the adjacent supporting rod group and the outer side sleeve wall, a plurality of cavities are arranged in the protective sleeve, and different cavities are directly communicated and are only indirectly communicated through the damping holes; however, the chamber is filled with fluid, and when the grinding wheel is subjected to sudden and strong axial pressure due to the error design of a feed program or the error operation of an operator, the fluid cannot completely pass through the damping hole in a short time, so that the force transmitted to the positioning screw by the grinding wheel cannot be quickly transmitted to the spindle, and the spindle with high cost is protected.
According to the invention, after the grinding wheel is turned over, the supporting state can be switched to the buffering state, so that the grinding wheel is convenient to disassemble, and is simple and convenient.
Drawings
Fig. 1 is a schematic perspective view of a first embodiment of the present invention;
FIG. 2 is a schematic perspective sectional view of a grinding wheel according to a first embodiment of the present invention;
FIG. 3 is a schematic cross-sectional plan view of a protective sheath according to a first embodiment of the present invention;
FIG. 4 is a schematic perspective view of a support rod assembly according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram of the sliding slot in the buffering mode according to the first embodiment of the present invention;
fig. 6 is a schematic structural view of the inner side of the sliding groove in the supporting mode according to the first embodiment of the present invention;
FIG. 7 is a schematic view of the structure of the orifice according to the first embodiment of the present invention;
fig. 8 is a schematic plan view of a telescopic wall according to a second embodiment of the present invention;
fig. 9 is a schematic diagram of an internal structure of a sliding slot in a buffering mode according to a third embodiment of the present invention;
fig. 10 is a schematic structural view of the inside of the sliding groove in the supporting mode according to the third embodiment of the present invention.
The reference numbers in the figures illustrate:
Detailed Description
The first embodiment is as follows: referring to fig. 1-7, the grinding wheel anti-collision six-axis numerical control tool grinding machine includes a grinding wheel 1, a spindle 2, a set screw 3 and a protective sleeve 4.
The main shaft 2 is a mounting seat of the grinding wheel 1, a positioning hole is formed in the mounting surface of the main shaft 2, and a threaded hole section and a positioning hole section are arranged in the positioning hole.
The positioning screw 3 is an installation part of the grinding wheel 1; one end of the positioning screw 3 is a threaded end, a positioning shaft is connected with the threaded end, and a nut is connected with the positioning shaft; during installation, the positioning screw 3 is embedded in the positioning hole of the main shaft 2 and penetrates through the grinding wheel 1 to position and press the grinding wheel 1 on the mounting surface of the main shaft 2, the threaded end is positioned in the positioning hole and is in threaded connection with the main shaft 2, and the positioning shaft is matched and positioned with the positioning hole section.
The protective sleeve 4 is detachably sleeved on the periphery of the positioning shaft of the positioning screw 3; the outer side wall of the protective sleeve 4 is flexible and is abutted against the inner wall of the positioning hole section of the positioning hole; the inner side wall of the protective sleeve 4 is flexible and is fixedly connected with a positioning shaft of the positioning screw 3, so that the protective sleeve 4 rotates along with the rotation of the main shaft 2;
a partition board is arranged in the protective sleeve 4 to divide the inner cavity of the protective sleeve 4 into an inner chamber and an outer chamber; the inner chamber and the outer chamber are filled with fluid; fluid communication within the inner and outer chambers; a plurality of supporting rod groups 42 which are uniformly distributed around the axis of the protective sleeve 4 are arranged in the inner chamber;
the support rod group 42 has the capability of telescopic deformation in the axial direction of the support rod group; the inner end of the support rod group 42 is a fixed end connected with the inner wall of the protective sleeve 4, and the outer end of the support rod group 42 is a movable end always in sliding contact with the partition board, that is, the support rod group 42 can rotate around the fixed end.
In the buffer mode, the support rod groups 42 have a shortened space in the axial direction, the axes of the support rod groups 42 are not overlapped with the axes of the protective sleeves 4, and the partition plate and the outer sleeve wall keep a gap to enable the outer chamber to be a through chamber; in this mode, protective sheath 4 is whole to be flexible, is applied to under the scene that set screw 3 installed in the locating hole, avoids set screw 3 to stretch into the angle mistake and fish tail main shaft 4's problem to take place.
In the supporting mode, the self axial length of the supporting rod groups 42 has no shortened space, the axis of each supporting rod group 42 is superposed with the axis of the protective sleeve 4, and at least part of partition plates are attached to the outer sleeve wall so as to divide the outer chamber into a plurality of chambers which are mutually partitioned; under this mode, protective sheath 4 presents the rigidity for have good support between set screw 3 and the locating hole, use and drive emery wheel 1 at main shaft 2 and rotate according to mode, thereby avoid emery wheel 1 to receive too much, too big radial pressure and take place moulding bending by the oppression of shearing force to damage main shaft 2 and set screw 3.
The partition plates constitute a plurality of sliding grooves 41 which are uniformly distributed; the number of the sliding grooves 41 is the same as that of the support rod groups 42; the movable end of each support rod group 42 is positioned in the corresponding sliding groove 41 and is in sliding abutment with the groove wall; the opening of the sliding groove 41 faces the inner sleeve wall; the wall of the sliding groove 41 comprises a telescopic wall 411, a rotating wall 412 and a fixed wall 413 which are sequentially connected end to end;
in the initial state, the tangent line of the inner jacket wall at the fixed end of each strut group 42 is inclined with respect to the corresponding rotating wall 412; the normal line (the line connecting the fixed end and the axis of the protective sleeve 4) of the inner side sleeve wall at the fixed end of each support rod group 42 is kept parallel to the corresponding telescopic wall 411; the telescopic wall 411 has the capability of telescopic deformation along the length direction thereof close to the outer side sleeve wall side; the end of the telescopic wall 411 far away from the rotating wall 412 is connected with the fixed wall 413 of the adjacent sliding groove 41; the end of the fixed wall 413 far away from the rotating wall 412 is connected with the telescopic wall 411 of the adjacent sliding groove 41;
in the buffering mode, the telescopic wall 411 maintains a free state and a gap is left between the outer sleeve walls, the connection end of the telescopic wall 411 and the rotating wall 412 is the proximal end of the rotating wall 412 opposite to the inner sleeve wall, the connection end of the fixed wall 413 and the rotating wall 412 is the distal end of the rotating wall 412 opposite to the inner sleeve wall, and the movable end of each support rod group 42 is located at the distal end of the rotating wall 412;
in the support mode, the telescopic wall 411 is kept in an extended state and is abutted against the outer jacket wall, and the connecting end of the telescopic wall 411 and the rotating wall 412 is switched to the far end of the rotating wall 412 relative to the inner jacket wall, or the rotating wall 412 is switched to be parallel to the tangent line of the inner jacket wall corresponding to the fixed end.
Each rotating wall 412 is provided with at least one damping hole; the inner chamber and the outer chamber exchange fluid through the damping holes; the damping orifice is adapted to pass the fluid at a normal flow rate only during the switching of the damping mode to the support mode, during which the rotation speed of the spindle 2 is gradually increased, rather than immediately reaching the nominal operating rotation speed, to damp the start of the protective sheath 4.
The support rod group 42 includes a main rod 421 and a sub-rod 422; one end of the main rod 421 is fixedly and rotatably connected with the inner side sleeve wall as a fixed end; the auxiliary rod 422 is slidably connected in the main rod 421 and extends out from the other end of the main rod 421, a limiting structure is arranged between one end of the auxiliary rod 422 in the main rod 421 and the inner wall of the main rod 421, and the specific form of the limiting structure is a conventional use means of a person skilled in the art, and is not described again; one end of the auxiliary rod 422, which is positioned outside the main rod 421, is a round head 423, and the round head 423 is a movable end; the diameter of the round head is larger than that of the main rod 421; the length of the sub-rod 422 is smaller than that of the main rod 421; the main rod 421 and the auxiliary rod 422 are both made of rigid materials; the center of gravity of the strut set 42 is located at the rounded end 423;
in the buffering mode, a gap is left between one end of the auxiliary rod 422 located in the main rod 421 and the limiting structure, that is, the supporting rod set 42 is not fully extended or is fully shortened; in the support mode, the round head 423 abuts against the end of the main rod 421 away from the inner wall, i.e. the length of the support rod group 42 is already the shortest value and cannot be shortened any more.
In the present embodiment, the axis of the support rod group 42 in fig. 5 is regarded as a, the axis of the support rod group 42 in fig. 6 is regarded as B, and a connecting line between the movable ends of the support rod group 42 in the buffering mode and the supporting mode is regarded as C; A. b and C form a triangle, wherein A is the longest side, namely A is more than B, A is more than C, and A is less than B + C.
The working principle is as follows: when the positioning screw 3 is installed in the positioning hole extending into the main shaft 2, the extending direction of the support rod group 42 is not overlapped with the axis of the protective sleeve 4, and when the protective sleeve 4 is stressed radially, the support rod group 42 can be shortened, so that the protective sleeve 4 becomes an integral flexible part, and the inner wall of the main shaft 2 is not easy to collide with between the positioning screw 3 and the inner wall of the main shaft 2.
After the grinding wheel 1 is installed, the grinding wheel 1 starts to rotate, the work direction of the grinding wheel 1 is positive rotation, and the positive rotation direction is the clockwise rotation direction in fig. 6; the rotation speed of the grinding wheel 1 is gradually increased from small to large instead of rapidly reaching the set rotation speed, so that the fluid in the outer chamber can flow into the inner chamber through the damping holes; in the process, as each component in the protective sleeve 4 is under the action of centrifugal force, the telescopic wall 411 extends until abutting against the outer sleeve wall, and the rotating wall 412 rotates along with the telescopic wall 411 to change the original proximal end into a distal end or a parallel end; because the fluid in the inner chamber rotates along with the spindle 2, the support rod group 42 is pressed by the fluid and receives centrifugal force, the support rod group 42 moves towards the telescopic wall 411, and finally, the state of being parallel to the radial direction of the protective sleeve 4 is kept; at this time, the length of the support rod group 42 is the minimum, and the support rod group cannot be shortened continuously, so that the support rod group is supported between the inner side sleeve wall and the outer side sleeve wall, a good support effect can be achieved on the positioning screw 3 and the main shaft 2, preparation is made for radial pressure applied to grinding of the grinding wheel 1, and shaping bending of the positioning screw 3 cannot be caused easily.
When the grinding wheel 1 is collided due to program errors or operator errors, the positioning screw 3 is subjected to very large radial pressure and is easy to generate plastic bending so as to damage the spindle 2, at the moment, a closed cavity is formed among the rotating wall 412, the fixed wall 413, the telescopic wall 411 and the outer side sleeve wall of the adjacent support rod group 42 and has a strong expansion or collapse tendency, but the existence of the damping hole can cause that fluid cannot rapidly circulate, so that the radial pressure applied to the positioning screw 3 is prevented from being transmitted to the spindle 2, and the damage of the spindle 2 is avoided; meanwhile, in this case, because the flow speed of the fluid in the outer chamber to the inner chamber is slowed down, the water pressure in the inner chamber is increased, the bearing capacity of the pressed part of the inner side sleeve wall is also improved, and the bending of the positioning screw 3 is avoided.
The second concrete embodiment: on the basis of the first embodiment, please refer to fig. 8 for a six-axis numerical control tool grinding machine with wheel anti-collision, in which the telescopic wall 411 includes a rigid wall, an elastic wall and a weight, which are sequentially connected in an initial position; the rigid wall is made of rigid material; the elastic wall is made of elastic material; the mass of the weight is greater than that of the spring wall, and the weight is connected with the rotating wall 412; in the buffering mode, the elastic wall is in a free state, and a gap is reserved between the weight and the outer sleeve wall; under the supporting mode, the elastic wall is in an extended state, and the weight is abutted against the outer side sleeve wall and keeps sealing; the weight used by the arrangement has large centrifugal effect, and can drive the elastic wall to stretch, so that the switching from the buffering mode to the supporting mode is accelerated.
The third concrete embodiment: on the basis of the first or second embodiment, please refer to fig. 9-10 for a six-axis numerical control tool grinding machine with anti-collision grinding wheel, wherein a plurality of bearing blocks 43 are fixedly arranged on the inner side of the outer side sleeve wall; the number of the receiving blocks 43 is the same as that of the telescopic walls 411; the receiving block 43 is located outside the corresponding telescopic wall 411; the receiving block 43 is located in the extension direction of the corresponding telescopic wall 411 along the length; in the support mode, the telescopic wall 411 abuts against the receiving block 43, and the rotating wall 412 is kept parallel to the tangent of the inner sleeve wall at the corresponding fixed end; this arrangement ensures that B is necessarily less than a, ensuring that the set of support rods 42 cannot be shortened to provide support for the set screw 3 and the main shaft 2.
The fourth concrete embodiment: based on the embodiments one, two or three, the fluid in the protective sheath 4 is a non-Newtonian fluid; when the non-Newtonian fluid is severely impacted, the flow rate can be greatly reduced, and when the grinding wheel 1 is collided due to program errors or operator errors and the radial pressure on the positioning screw 3 is very large, the fluid communication between the outer chamber and the inner chamber is further slowed down; however, in the process of switching from the normal buffering mode to the supporting mode, the non-Newtonian fluid has the flowing characteristic of the common fluid, and the switching is ensured to be realized.
The fifth concrete embodiment: different from the first embodiment, the second embodiment, the third embodiment or the fourth embodiment, in the supporting state, the connecting end of the telescopic wall 411 and the rotating wall 412 is not abutted against the outer side sleeve wall, and only the distance between the connecting end and the outer side sleeve wall is shortened; in this case, when the grinding wheel 1 is collided due to a program error or an operator error, and the radial pressure on the set screw 3 is very high, the inner side sleeve wall transmits a radial force to the partition plate through the support rod group 42, the fluid in the outer chamber cannot rapidly flow to the inner chamber due to the action of the damping hole, the partition plate compresses the fluid in the outer chamber, the compression of the fluid is easier than that of a solid, and the damage to the spindle 2 caused by the transmission of the radial force to the spindle 2 is avoided.
Claims (10)
1. The utility model provides a six numerical control tool grinding machines of emery wheel anticollision which characterized in that: comprises that
A grinding wheel (1);
the main shaft (2) is a mounting seat of the grinding wheel (1), and a positioning hole is formed in the mounting surface;
the positioning screw (3) is an installation part of the grinding wheel (1); when the grinding wheel is installed, the threaded end of the positioning screw (3) penetrates through the grinding wheel (1) and extends into the positioning hole to be in threaded connection with the positioning hole; and
the protective sleeve (4) is detachably sleeved on the periphery of the positioning screw (3), and the outer side sleeve wall of the protective sleeve (4) is flexible and is abutted against the inner wall of the positioning hole; the inner cavity of the protective sleeve (4) is filled with fluid, and a plurality of supporting rod groups (42) which are uniformly distributed around the axis of the protective sleeve (4) are arranged; the support rod group (42) has the capability of telescopic deformation in the axial direction of the support rod group; the inner side end of the support rod group (42) is a fixed end connected with the inner side sleeve wall of the protective sleeve (4), and the outer side end of the support rod group (42) is a movable end directly or indirectly abutted against the outer side sleeve wall of the protective sleeve (4); in a buffer mode, the support rod groups (42) have a shortened space in the axial direction of the support rod groups, and the axis of each support rod group (42) is not superposed with the axis of the protective sleeve (4); in the supporting mode, the self axial length of the supporting rod groups (42) has no shortened space, and the axis of each supporting rod group (42) is coincided with the axis of the protective sleeve (4).
2. The grinding wheel anti-collision six-axis numerical control tool grinding machine as claimed in claim 1, characterized in that: a partition plate is arranged in the protective sleeve (4) to divide the inner cavity of the protective sleeve (4) into an inner chamber and an outer chamber; fluid communication within the inner and outer chambers; the support rod group (42) is arranged in the inner chamber, and the movable end is always in butt joint with the partition plate; in the buffer mode, the partition plate and the outer sleeve wall keep a gap so that the outer chamber becomes a through chamber; in the support mode, at least part of the partition plates are attached to the outer side sleeve wall so that the outer chamber is divided into a plurality of mutually partitioned chambers.
3. The grinding wheel anti-collision six-axis numerical control tool grinding machine as claimed in claim 2, characterized in that: the partition plate is provided with at least one damping hole; the inner and outer chambers exchange fluid through the orifice.
4. The grinding wheel anti-collision six-axis numerical control tool grinding machine as claimed in claim 2, characterized in that: the partition plate forms a plurality of sliding grooves (41) which are uniformly distributed; the number of the sliding grooves (41) is consistent with that of the supporting rod groups (42); the movable end of each support rod group (42) is positioned in the corresponding sliding groove (41) and is in sliding abutment with the groove wall; the wall of the sliding groove (41) comprises a telescopic wall (411), a rotating wall (412) and a fixed wall (413) which are sequentially connected end to end; the tangent line of the inner sleeve wall at the fixed end of each support rod group (42) is inclined with the corresponding rotating wall (412); the normal line of the inner side sleeve wall at the fixed end of each support rod group (42) is kept parallel to the corresponding telescopic wall (411); the telescopic wall (411) has the capability of telescopic deformation along the length direction of the telescopic wall close to the outer side sleeve wall side; the end of the telescopic wall (411) far away from the rotating wall (412) is connected with the fixed wall (413) of the adjacent sliding groove (41); the end of the fixed wall (413) far away from the rotating wall (412) is connected with the telescopic wall (411) of the adjacent sliding groove (41);
in a buffering mode, the telescopic wall (411) keeps a free state and a gap is reserved between the outer sleeve walls, the connecting end of the telescopic wall (411) and the rotating wall (412) is the near end of the rotating wall (412) relative to the inner sleeve wall, the connecting end of the fixed wall (413) and the rotating wall (412) is the far end of the rotating wall (412) relative to the inner sleeve wall, and the moving end of each support rod group (42) is located at the far end of the rotating wall (412);
in the support mode, the telescopic wall (411) keeps an extension state and is abutted with the outer sleeve wall, and the connecting end of the telescopic wall (411) and the rotating wall (412) is switched to be the far end of the rotating wall (412) relative to the inner sleeve wall or the rotating wall (412) is switched to be parallel to the tangent line of the inner sleeve wall at the corresponding fixed end.
5. The grinding wheel anti-collision six-axis numerical control tool grinding machine as claimed in claim 1, characterized in that: the support rod group (42) comprises a main rod (421) and an auxiliary rod (422); one end of the main rod (421) is fixedly and rotatably connected with the inner side sleeve wall and is a fixed end; the auxiliary rod (422) is connected in the main rod (421) in a sliding manner and extends out of the other end of the main rod (421), a limiting structure is arranged between one end of the auxiliary rod (422) positioned in the main rod (421) and the inner wall of the main rod (421), one end of the auxiliary rod (422) positioned outside the main rod (421) is a round head (423), and the round head (423) is a movable end; the diameter of the round head is larger than that of the main rod (421); the length of the auxiliary rod (422) is less than that of the main rod (421); the main rod (421) and the auxiliary rod (422) are both made of rigid materials.
6. The grinding wheel collision avoidance six-axis numerical control tool grinding machine according to claim 5, characterized in that: in the buffering mode, a gap is reserved between one end, positioned in the main rod (421), of the auxiliary rod (422) and the limiting structure; in the supporting mode, the round head (423) is abutted against the end, far away from the inner side wall, of the main rod (421).
7. The grinding wheel anti-collision six-axis numerical control tool grinding machine as claimed in claim 4, wherein: the telescopic wall (411) comprises a rigid wall, a spring wall and a weight which are sequentially connected in an initial position; the rigid wall is made of a rigid material; the elastic wall is made of elastic material; the mass of the weight is greater than that of the elastic wall, and the weight is connected with the rotating wall (412); in the buffering mode, the elastic wall is in a free state, and a gap is reserved between the weight and the outer sleeve wall; in the supporting mode, the elastic wall is in an extended state, and the weight is abutted against the outer sleeve wall and keeps sealing.
8. The grinding wheel anti-collision six-axis numerical control tool grinding machine as claimed in claim 4, wherein: a plurality of bearing blocks (43) are fixedly arranged on the inner side of the outer sleeve wall; the number of the bearing blocks (43) is consistent with that of the telescopic walls (411); the bearing block (43) is positioned on the extension direction of the telescopic wall (411) along the length; in the supporting mode, the telescopic wall (411) is abutted with the bearing block (43), and the rotating wall (412) is kept parallel to the tangent line of the inner sleeve wall at the corresponding fixed end.
9. The grinding wheel anti-collision six-axis numerical control tool grinding machine as claimed in claim 1, characterized in that: the fluid is a non-Newtonian fluid.
10. The grinding wheel anti-collision six-axis numerical control tool grinding machine as claimed in claim 5, characterized in that: the center of gravity of the strut assembly (42) is located on the rounded end (423).
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| CN202210339105.4A CN114734337B (en) | 2022-04-01 | 2022-04-01 | Six numerical control tool grinding machines of emery wheel anticollision |
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| CN202210339105.4A CN114734337B (en) | 2022-04-01 | 2022-04-01 | Six numerical control tool grinding machines of emery wheel anticollision |
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| CN114734337B CN114734337B (en) | 2023-03-31 |
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