CN115464447B - Double-spindle drilling and tapping center without stopping rotary tool changing - Google Patents
Double-spindle drilling and tapping center without stopping rotary tool changing Download PDFInfo
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- CN115464447B CN115464447B CN202211199544.6A CN202211199544A CN115464447B CN 115464447 B CN115464447 B CN 115464447B CN 202211199544 A CN202211199544 A CN 202211199544A CN 115464447 B CN115464447 B CN 115464447B
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- 238000005553 drilling Methods 0.000 title claims abstract description 12
- 230000000712 assembly Effects 0.000 claims abstract description 17
- 238000000429 assembly Methods 0.000 claims abstract description 17
- 230000005291 magnetic effect Effects 0.000 claims description 50
- 239000004020 conductor Substances 0.000 claims description 10
- 230000005389 magnetism Effects 0.000 claims description 8
- 230000005294 ferromagnetic effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000013013 elastic material Substances 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 238000003754 machining Methods 0.000 abstract description 7
- 230000009977 dual effect Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/155—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling
- B23Q3/157—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling of rotary tools
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
- Automatic Tool Replacement In Machine Tools (AREA)
Abstract
The invention discloses a double-spindle drilling and tapping center with a non-stop cutter changing function, and belongs to the field of machining equipment. A dual spindle drill center for a non-stall tool changer, comprising: the bridge plate module comprises a bridge plate for bearing the clamp and the workpiece, an X-axis drive for driving the bridge plate to move on an X axis and a Y-axis drive for driving the bridge plate to move on a Y axis; the upright column module comprises a main shaft for clamping the knife handle and a Z-axis drive for driving the main shaft to move on a Z axis; the tool magazine module comprises an annular guide rail, a plurality of clamping assemblies moving around the annular guide rail, tools clamped by the corresponding clamping assemblies and clamping drives driving the clamping assemblies to move; the tool magazine module is rotationally connected with the upright post module; the synchronous rotation of the cutter and the main shaft can be realized, the main shaft is connected with the cutter in a matched manner in the rotation process, the service life of a main shaft motor is prolonged, and the cutter changing speed is improved.
Description
Technical Field
The invention belongs to the field of machining equipment, and particularly relates to a double-spindle drilling and tapping center with a non-stop cutter changing function.
Background
In the machining and drilling process of the component, generally, different machining tools are required, and when the different machining tools are switched, the component is not machined and the tools need to be waited for switching. The shortening of the tool changing time is beneficial to the process cost reduction; in addition, in the start-stop switching process of the spindle motor, the service life of the motor can be shortened, and if the number of times of start-stop switching of the motor is reduced, the process cost is reduced.
How to shorten the tool changing time, the existing general method of changing tools without stopping rotation is adopted, such as a mechanical arm automatic tool changing device with a main shaft of a processing center with a patent number of CN201610288166.7 without stopping rotation, which comprises a main shaft, a cutter handle, a tool magazine, a tool changing mechanical arm and a numerical control system; the main shaft has a speed regulation function and a real-time detection and adjustment function for circumferential positions; the tool handle comprises an outer taper shank coaxially connected with the main shaft, a tool body, a bearing sleeved on the tool body, a groove, an A meshing device and a tool; the tool magazine comprises a plurality of tool positions and tool position transposition devices, each tool position comprises a taper sleeve used for clamping a tool, a tool driving motor used for driving the tool to rotate, a real-time detection and adjustment system for the circumferential position of the tool, and a B meshing device meshed with the tool, so that the tool on a main shaft of a machining center can be rapidly replaced under the condition that the main shaft does not stop rotating, and the tool in the tool magazine can be rapidly replaced, and the auxiliary machining time in machining of the machining center is saved.
However, the arrangement mode needs to modify the cutter handle, cannot be applied to a general cutter handle, has high manufacturing cost and narrow application range, and is not beneficial to mass popularization and utilization; secondly, it is too little at the grip face when centre gripping handle of a knife, and the handle of a knife is easy to rock when rotating, has the risk that breaks away from the centre gripping easily and causes the cutter to damage.
For a double-spindle machine tool, the requirement on the synchronism of tool changing of two spindles is higher, for example, a double-spindle drilling and tapping center with the patent number of CN202111583845.4 comprises a machine tool body and a box body arranged on the machine tool body, wherein the top of the box body is provided with a cross beam, the front part of the box body is provided with a spindle box capable of moving vertically, two spindles which are symmetrical left and right are arranged in the spindle box, cutters are arranged on the spindles, two sides of the spindle box are fixedly provided with fixed side plates, a tool beating cylinder is arranged above each spindle between the two fixed side plates, a mounting plate for the tool beating cylinder is arranged, a supporting plate capable of moving back and forth and left and right is arranged on the machine tool body, an automatic tool changing device with an automatic tool changing function is further arranged at the position close to the spindle box, and a suspension arm which is movably connected with the automatic tool changing device is arranged at the front part of the cross beam; the tool changing device can be used for placing a tool to be changed at the lower side of the main shaft while the whole tool changing device rotates, and the tool changing can be realized only by moving the main shaft up and down; however, the tool shank of the tool must be mounted in the spindle on the premise of stopping the spindle, because the tool shank cannot rotate on the annular track.
Disclosure of Invention
The invention aims to solve the technical problem of providing a double-spindle drilling and tapping center without stopping rotation type tool changing, which can realize synchronous rotation of a tool and a spindle, wherein the spindle is connected with the tool in a matching way in the rotation process, so that the service life of a spindle motor is prolonged, and the tool changing speed is improved.
The invention relates to a double-spindle drilling and tapping center without stopping a rotary tool changer, which comprises the following components:
the bridge plate module comprises a bridge plate for bearing the clamp and the workpiece, an X-axis drive for driving the bridge plate to move on an X axis and a Y-axis drive for driving the bridge plate to move on a Y axis;
the upright column module comprises a main shaft for clamping the knife handle and a Z-axis drive for driving the main shaft to move on a Z axis;
the tool magazine module comprises an annular guide rail, a plurality of clamping assemblies moving around the annular guide rail, tools clamped by the corresponding clamping assemblies and clamping drives driving the clamping assemblies to move; the tool magazine module is rotationally connected with the upright post module; the inner sides of a pair of clamping jaws of the clamping assembly are respectively provided with a plurality of freely rolling balls so as to enable the cutter to have autorotation space when clamped; the clamping assemblies are respectively provided with a connecting unit positioned at the outer side of the cutter, the connecting units are embedded and clamped with key grooves of the cutter, and the connecting units are detachably connected with the main shaft so that the main shaft drives the cutter to rotate;
the tool changing drive is positioned on the upper side of the upright post module, the output end of the tool changing drive is rotationally connected with the tool magazine module, the output end of the tool changing drive has telescopic capability so that the tool magazine module rotates to a position where at least one pair of tools are positioned on the lower side of the corresponding main shaft, and the main shaft and the corresponding tools are coaxial when the tool magazine module is positioned.
As a further improvement of the invention, the clamping assembly comprises a frame arm directly or indirectly connected with the annular guide rail, a frame base connected with the end of the frame arm far away from the annular guide rail, a mounting wall positioned in the middle of the frame base, clamping jaws respectively arranged at two sides of the frame base, and a connecting unit detachably connected at the upper side of the mounting wall; the end part of the clamping jaw, which is far away from the frame arm, is a clamping end, the clamping end at least comprises an arc section, and the balls are positioned on the inner wall of the clamping end; the end part of the clamping jaw, which is close to the frame arm, is a rotating end, and the two rotating ends are connected through a spring; during clamping, the balls are abutted against the outer side of the cutter, the springs are in a compressed state, and the clamping ends have a trend of approaching to the direction of the cutter; the connecting unit is clamped with the key groove of the cutter handle.
As a further improvement of the invention, the clamping end comprises an oblique angle section and a circular arc section; the bevel angle section is connected with the end, far away from the arm, of the arc section; the bevel angle section is tangent to the arc section, and the bevel angle sections of the two clamping ends are mutually close to each other; when clamping, the two bevel sections are mutually close to each other to keep a distance, and the distance is smaller than the length of the connecting unit; the arc length of the arc section is at least greater than the arc length of the outer side surface of one half of the knife handle.
As a further improvement of the invention, the bevel angle section is provided with a flaring section at the end far away from the circular arc section; the two flared sections are disposed remote from each other.
As a further improvement of the invention, the connecting unit comprises a driving plate, a telescopic part, a bottom plate and a clamping key; the driving plate is at least made of magnetic conductive materials, a magnetic piece is arranged at the lower end face of the main shaft, which is positioned at the outer side of the mounting ring, and the magnetic piece keeps attractive force to the driving plate; the telescopic direction of the telescopic part is only the vertical direction; the bottom plate is detachably connected with the mounting wall; the clamping key is always embedded in the key groove of the cutter handle; when the tool is connected, the magnetic piece is abutted with the driving plate, the telescopic part is in the maximum extension state, the connection between the bottom plate and the mounting wall is disconnected, and the clamping key is embedded in the key groove of the tool handle, so that the main shaft drives the tool to rotate.
As a further improvement of the invention, the telescopic part comprises a telescopic bag, the bag wall of the telescopic bag is made of flexible or elastic materials, a supporting frame is arranged on the outer side of the telescopic bag, and the supporting frame is made of rigid materials and has a structure which stretches in the vertical direction; the inner cavity of the telescopic bag is a closed air cavity, the inner cavity is provided with an air inlet and an air outlet, and the air inlet and the air outlet are unidirectional channels.
As a further improvement of the invention, the telescopic part comprises a telescopic bag, the bag wall of the telescopic bag is made of flexible metal core strips, and the inner cavity of the telescopic bag is an open air cavity.
As a further development of the invention, the bottom plate is made of at least a magnetically conductive material; the mounting wall is made of at least a magnetic material; the mounting wall maintains attractive force to the bottom plate; the attractive force of the mounting wall to the bottom plate is smaller than the attractive force of the magnetic piece to the driving plate.
As a further development of the invention, the bottom plate is made of at least a magnetically conductive material; the mounting wall is made of at least a magnetically conductive material; at least one pair of strong magnetic components are arranged on the outer side of the annular guide rail, and the magnetism of the strong magnetic components is stronger than that of the magnetic components; after the cutter is installed in the main shaft, the annular guide rail is turned away from the main shaft, and the installation wall of the corresponding clamping assembly of the cutter installed in the main shaft is detachably abutted with the ferromagnetic component and magnetized; when the tool on the main shaft needs to be replaced, the attractive force of the installation wall to the bottom plate is larger than the attractive force of the magnetic piece to the driving plate, and the connection unit is disconnected with the main shaft and is connected with the installation wall in a restoration mode.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the cutter is clamped by arranging the pair of arc-shaped clamping jaws, and the inner sides of the clamping jaws are also provided with the freely rolling balls, so that the cutter in the autorotation state can be clamped, the original static cutter can also have the driven autorotation capability, the cutter can autorotate along with the spindle, the spindle motor is not required to stop, and the cutter replacement speed is also increased;
according to the invention, the connecting unit is arranged, so that the stationary cutter can be indirectly driven by the main shaft, and the key groove of the cutter handle corresponds to the key of the main shaft, so that the cutter can be mounted only by downwards moving the main shaft, and the cutter mounting process is quick and simple.
Drawings
Fig. 1 is a schematic perspective view of a tapping center according to a first embodiment of the present invention;
fig. 2 is a schematic perspective view of a tool magazine module and a spindle according to a first embodiment of the present invention;
fig. 3 is a schematic perspective view of a tool magazine module according to a first embodiment of the present invention;
FIG. 4 is a schematic perspective view illustrating a clamping assembly and a tool according to a first embodiment of the present invention;
FIG. 5 is a schematic perspective view of a clamping assembly according to a first embodiment of the present invention;
FIG. 6 is a schematic plan view of a tool according to a first embodiment of the invention;
FIG. 7 is a schematic plan view of a cutter according to a first embodiment of the present invention when the cutter is clamped and rotated;
FIG. 8 is a schematic plan view of a connection unit according to a first embodiment of the present invention when extended;
FIG. 9 is a schematic view showing a flat structure of a connection unit in compression according to a first embodiment of the present invention;
FIG. 10 is a schematic view showing a structure of a tool according to the first embodiment of the present invention when the tool is moved to the lower side of a spindle;
FIG. 11 is a schematic view of a tool approaching a spindle according to a first embodiment of the present invention;
FIG. 12 is a schematic view of a tool and spindle co-rotation structure according to a first embodiment of the present invention;
FIG. 13 is a schematic view showing a structure of a tool according to the first embodiment of the invention when the tool is mounted in a spindle;
FIG. 14 is a schematic view showing a structure of a clamping assembly separated from a tool according to a first embodiment of the present invention;
FIG. 15 is a schematic view of a clamping assembly according to a first embodiment of the present invention when the clamping assembly re-clamps a tool to be replaced;
fig. 16 is a schematic view showing a structure of a tool to be replaced according to a first embodiment of the present invention separated from a spindle.
The reference numerals in the figures illustrate:
bridge plate module 1, column module 2, tool changing drive 3, magazine module 4, annular rail 41, clamping assembly 42, rack arm 421, rack mount 422, mounting wall 423, clamping jaw 424, connection unit 425, drive plate 4251, bellows 4252, bottom plate 4253, clamping key 4254, air inlet 4255, air outlet 4256, tool 43, spindle 5, magnetic piece 51.
Detailed Description
First embodiment: referring to fig. 1-16, a dual spindle drill center without stopping tool change, comprising: bridge plate module 1, stand module 2, tool changing drive 3, tool magazine module 4 and main shaft 5.
The bridge plate module 1 comprises a bridge plate for bearing the clamp and the workpiece, an X-axis drive for driving the bridge plate to move on the X-axis and a Y-axis drive for driving the bridge plate to move on the Y-axis.
The column module 2 comprises a main shaft 5 for clamping the knife handle and a Z-axis drive for driving the main shaft 5 to move on the Z axis.
The tool magazine module 4 comprises an annular guide rail 41, a plurality of clamping assemblies 42 which move around the annular guide rail 41, tools 43 clamped by the corresponding clamping assemblies 42 and clamping drives which drive the clamping assemblies 42 to move; the tool magazine module 4 is rotationally connected with the upright post module 2; the inner sides of a pair of clamping jaws 424 of the clamping assembly 42 are respectively provided with a plurality of freely rolling balls so as to enable the cutter 43 to have a self-rotating space when being clamped; the clamping assemblies 42 are respectively provided with a connecting unit 425 positioned at the outer side of the cutter 43, the connecting unit 425 is in embedded clamping connection with a key groove of the cutter 43, and the connecting unit 425 is detachably connected with the spindle 5 so that the spindle 5 drives the cutter 43 to rotate.
The tool changing drive 3 is located on the upper side of the column module 2, the output end of the tool changing drive 3 is rotationally connected with the tool magazine module 4, and the output end of the tool changing drive 3 has telescopic capacity to enable the tool magazine module 4 to rotate to a position where at least one pair of tools 43 are located on the lower side of the corresponding spindle 5, and in this position, the spindle 5 is coaxial with the corresponding tools 43.
Since the invention is based on:
a double-spindle drilling and tapping center with the patent number of CN202111583845.4,
A tool setting device applied to a double-spindle drilling and tapping center, which has the patent number of CN202123318569.7,
The improved invention of the tool clamping device applied to the double-spindle drilling and tapping center in the patent number CN202123274712.7 is disclosed, therefore, the specific structure, the matching relationship, the tool changing process and the like of the bridge module 1, the column module 2, the tool changing drive 3, the annular guide rail 41 and the spindle 5 in this embodiment are all referred to the descriptions of the three prior patents, and are not repeated herein; the disclosure of the present application and the three prior patents is the clamping assembly 42 of the tool magazine module 4, and therefore, the following description of the clamping assembly 42 and the related mating components will focus on this embodiment.
The clamping assembly 42 comprises a frame arm 421 indirectly connected with the annular guide rail 41, a frame seat 422 connected with the end, far away from the annular guide rail 41, of the frame arm 421, a mounting wall 423 positioned in the middle of the frame seat 422, clamping jaws 424 respectively arranged on two sides of the frame seat 422, and a connecting unit 425 detachably connected to the upper side of the mounting wall 423.
The specific connection manner between the frame arm 421 and the annular guide rail 41 is the prior art, which is not described herein, and the frame arm 421 can move around the annular guide rail 41;
the frame 422 is made of rigid materials, the middle of the frame 422 is hollow, the mounting wall 423 is detachably embedded in the middle of the frame 422, and the upper end face of the mounting wall 423 is flush with the upper end face of the frame 422;
the end of the clamping jaw 424, which is close to the rack arm 421, is a rotating end, the two rotating ends are connected through a spring, and when the clamping jaw is clamped, the spring is in a compressed state, and the clamping ends all have the tendency of approaching to the direction of the cutter 43; the specific connection manner between the clamping jaw 424 and the frame 422 is the prior art, and is not described herein, the end of the clamping jaw 424 away from the frame arm 421 is a clamping end, and the structure of the clamping end is different from the prior art;
in this embodiment, the clamping end includes a circular arc section, an oblique angle section, and a flared section;
the inner diameter of the circular arc section is slightly larger than the outer diameter of the cutter handle, a plurality of freely rolling balls are embedded in the inner wall of the circular arc section, at least part of the balls are exposed out of the inner side of the circular arc section and are in butt joint with the periphery of the cutter handle, and the arc length of the circular arc section is at least larger than the arc length of the outer side surface of one half of the cutter handle, so that the cutter handle can be in butt joint with as many balls as possible, the limit capacity of the cutter handle is improved, and the cutter 43 is not easy to shake when rotating;
the bevel angle section is connected with the end of the arc section far away from the bracket arm 421; the bevel angle sections are tangent to the circular arc sections, the bevel angle sections of the two clamping ends are mutually close, when clamping, the two bevel angle sections are mutually close, the distance is kept between the two bevel angle sections, the distance is smaller than the length of the connecting unit 425, and the arrangement is favorable for the clamping jaw 424 to be separated from the knife handle when the annular guide rail 41 returns;
the flaring section sets up at the oblique angle section and keeps away from the circular arc section end, and two flaring sections set up mutually and keep away from ground, and such setting is favorable to annular guide rail 41 to handle of a knife side when rotating, and clamping jaw 424 is opened by the handle of a knife butt, and the handle of a knife easily slides in the clamping jaw 424.
The connection unit 425 includes a driving plate 4251, a telescopic portion, a bottom plate 4253, and a snap key 4254;
the driving plate 4251 is made of a magnetic conductive material, in this embodiment, the driving plate 4251 is made of an iron alloy, and has the characteristic of being attracted by a magnetic component, and a magnetic component 51 is arranged at the lower end face of the spindle 5, which is positioned outside a mounting ring, wherein the magnetic component 51 keeps attractive force on the driving plate 4251, the mounting ring refers to an annular component used for being clamped with a tool shank at the lower end of the spindle 5, and the mounting ring is lower than the lower end face of the spindle 5, so that the magnetic component 51 is arranged at the mounting ring and does not interfere with the clamping of the tool shank with the spindle 5, and the lower end face of the magnetic component 51 is higher than or equal to the lower end face of the mounting ring;
the clamping key 4254 is made of a hard component, the clamping key 4254 is always embedded in a key groove of the handle, the clamping key 4254 is arranged on the outer side of the telescopic part, the driving plate 4251 is arranged on the top end of the telescopic part, and the bottom plate 4253 is arranged on the bottom end of the telescopic part;
the telescopic direction of the telescopic part is only the vertical direction, and the telescopic distance of the telescopic part is limited; in this embodiment, the telescopic portion includes a telescopic bag 4252, the wall of the telescopic bag 4252 is made of flexible or elastic material, a supporting frame is provided on the outer side of the telescopic bag 4252, the supporting frame is made of rigid material, and has a structure that stretches in the vertical direction, which is similar to the telescopic rod of the folding umbrella, and is a conventional means for those skilled in the art, so the function of the supporting frame is to ensure that the telescopic bag 4252 stretches only in the vertical direction; the inner cavity of the telescopic bag 4252 is a closed air cavity, the inner cavity is provided with an air inlet 4255 and an air outlet 4256, the air inlet 4255 and the air outlet 4256 are all unidirectional channels, the air inlet 4255 and the air outlet 4256 are normally closed, the opening of the air inlet 4255 and the air outlet 4256 are all provided with pressure thresholds, the unidirectional channels are similar to duckbill valves in form, and the unidirectional channels are conventional means of the person skilled in the art, so that the unidirectional channels are not repeated; the driving force of the telescopic bag 4252 for stretching is provided by the attraction force of the magnetic member 51 to the driving plate 4251, because the clamping assembly 42 is positioned at the lower side of the main shaft 5 when the tool is ready to be changed, the clamping assembly 42 is motionless, the main shaft 5 is rotating, the magnetic member 51 is not always right above the telescopic bag 4252, each time the magnetic member 51 rotates to the right above the telescopic bag 4252, the magnetic member 51 attracts the driving plate 4251 to ascend, the ascending of the driving plate 4251 can enable the inner cavity air pressure of the telescopic bag 4252 to be reduced, the air inlet 4255 is pressed and opened by the external atmospheric pressure, the inner cavity of the telescopic bag 4252 is inflated until the driving plate 4251 is ascended to be abutted with the magnetic member 51, in the embodiment, the telescopic bag 4252 stretches, when the magnetic member 51 is abutted with the driving plate 4241, the movement distance of the driving plate 4251 exceeds the limit distance that the telescopic bag 4252 can stretch, at the moment, the connecting unit 425 can be separated from the connection with the mounting wall 423, the main shaft 5 rotates to drive the connecting unit 425, the connecting unit to rotate, the connecting unit 425 is kept in contact with the tool 5, the inner cavity of the tool 5 is completely pressed down by the tool 5, and the inner cavity of the tool 5 is completely pressed by the tool 5, and the tool holder 4252 is completely pressed down, and the tool 5 is completely pressed by the inner cavity 5 is completely pressed by the tool 5, and the tool 5 is completely pressed down, and the tool 5 is completely under the condition that the tool holder 5 is pressed by the inner cavity 5 is pressed and pressed by the inner cavity 5 and has the tool holder 5 is pressed and has the tool 5 is completely and pressed;
the bottom plate 4253 is detachably connected to the mounting wall 423, in this embodiment, the bottom plate 4253 is also made of a ferroalloy, the mounting wall 423 is made of a magnetic member or a magnetized magnetic member, and an attractive force is provided between the mounting wall 423 and the bottom plate 4253, wherein when the cutter 43 is clamped on the clamping assembly 42 to prepare for changing the cutter, the attractive force between the mounting wall 423 and the bottom plate 4253 is smaller than the attractive force between the driving plate 4251 and the magnetic member 51 when they are abutted;
the key groove depth of the tool shank is generally larger than the key height of the lower end of the mounting ring, so that the locking key 4254 has a space for locking in the key groove, and the lower end surface of the magnetic member 51 is higher than or equal to the lower end surface of the mounting ring, and after the tool 43 is mounted, a certain distance is left between the lower end surface of the magnetic member 51 and the upper end surface of the mounting wall 423, so that the telescopic part has a space for installation.
Working principle: when the spindle 5 needs to be changed, the annular guide rail 41 turns over in the direction close to the spindle 5, the two clamping assemblies 42 clamp a new tool 43 to be changed and are positioned on the lower side of the spindle 5, the spindle 5 is coaxial with the tool 43 at the moment, the spindle 5 still keeps rotating at the moment, no tool is assembled on the spindle 5 at the moment, the tool 43 is clamped by the clamping assemblies 42 and does not rotate, and the connecting unit 425 is connected to the mounting wall 423; the spindle 5 is firstly lowered by one end distance in advance, so that the magnetic piece 51 of the spindle 5 can attract the driving plate 4251 to move upwards, at this time, the distance between the lower end surface of the magnetic piece 51 and the upper end surface of the mounting wall 423 is larger than the maximum extension size of the connecting unit 425, when the driving plate 4251 is attracted by the magnetic piece 51 to gradually move upwards until the driving plate 4251 is abutted against the magnetic piece 51, the connection between the connecting unit 425 and the mounting wall 423 is disconnected, the clamping key 4254 of the connecting unit 425 is always matched and embedded with a key groove of the cutter handle, the spindle 5 drives the connecting unit 425 and indirectly drives the cutter 43 to rotate, and the cutter 43 can rotate when clamped by the clamping assembly 42 due to the abutting of the balls; the spindle 5 then continues to descend, the connection unit 425 is compressed, and the cutter 43 is completely fitted to the spindle 5; then, the clamping assembly 42 needs to be withdrawn, and the spindle 5 formally completes the loading of the tool due to the structure of the balls and the clamping ends of the clamping jaws 424, so that the clamping assembly 42 can be easily withdrawn.
Specific embodiment II: on the basis of the first embodiment, the bottom plate 4253 and the mounting wall 423 are made of a magnetically conductive material; there is a releasable mating connection, such as a snap-fit connection, between the base plate 4253 and the mounting wall 423, which is conventional to those skilled in the art and will not be described in detail herein.
The outer side of the annular guide rail 41 is provided with a pair of strong magnetic pieces, and the magnetism of the strong magnetic pieces is stronger than that of the magnetic pieces 51; the ferromagnetic piece is stationary with respect to the annular guide rail 41, that is, the annular guide rail 41 is not moved during the overturning movement, and the ferromagnetic piece corresponds to the clamping assembly 42 facing the spindle 5; the ferromagnetic element is arranged in a stationary manner with respect to the annular rail 41, and can be connected to the column module 2 by a fixed base, or can be implemented by a connecting rod assembly which is free to rotate with the annular rail 21, and this arrangement and form are conventional to those skilled in the art and therefore will not be described in detail.
After the cutter 43 is mounted in the main shaft 5, the annular guide rail 41 is turned away from the main shaft 5, and the mounting wall 423 of the corresponding clamping assembly 42 of the cutter 43 mounted in the main shaft 5 is detachably abutted with the ferromagnetic member and magnetized; the strong magnetic member is in contact with the mounting wall 423, and after a certain period of magnetization, the mounting wall 423 is magnetized, and at this time, the attractive force between the mounting wall 423 and the driving plate 4251 is greater than the attractive force between the magnetic member 51 and the driving plate 4251.
When the tool on the spindle 5 needs to be replaced, the tool 43 and the connecting unit 425 on the clamping assembly 42 which originally clamps the tool 43 need to be taken off together when the next tool 43 needs to be used after the tool 43 is used because the connecting unit 425 on the clamping assembly 42 which originally clamps the tool 43 is temporarily left on the spindle 5 when the tool 43 is assembled on the spindle 5 on the drilling center; the mounting wall 423 with enhanced magnetism through the strong magnetic member can attract the connecting unit 425 to be attached to the mounting wall 425, and the connection is restored; when the annular guide 41 is turned over to be ready for replacement of the next cutter 43 under the spindle 5, the drive plate 4251 is disconnected from the magnetic member 51, or when the spindle 5 moves upward, the drive plate 4251 is disconnected from the magnetic member 51, or when the spindle 5 rotates, the drive plate 4251 is disconnected from the magnetic member 51.
Third embodiment: unlike the second embodiment, the lower end of the stand 422 is provided with an independently operated electromagnet assembly, the electromagnet assembly is abutted against the mounting wall 423, the power-on size of the electromagnet assembly is controlled by a controller, and the controller is positioned at the lower end of the stand 422; when the connection between the driving plate 4251 and the magnetic member 51 is required to be disconnected, the energizing current of the electromagnet assembly is increased, so that the magnetizing intensity of the mounting wall 423 is larger and faster, and the object of the invention achieved by the second embodiment can be achieved.
The lower end of the mount 422 here means the end surface of the mount 422 that is far from the spindle 5.
Fourth embodiment: unlike any one to three of the embodiments, the gripping end of the gripping jaw 424 includes only a circular arc segment, a bevel segment.
Fifth embodiment: unlike any of the first through third embodiments, the gripping end of the grip jaw 424 includes only a circular arc segment.
Specific embodiment six: unlike the first embodiment, the walls of the bellows 4252 are made of flexible metal strips, the lumen of the bellows 4252 is an open air lumen, and the flexible metal strips can only flex in the vertical direction.
Specific embodiment seven: unlike either of the second or third embodiments, the annular guide 41 is turned over by a larger angle after the cutter 43 is mounted on the spindle 5; and a magnetism adding member is provided outside the annular guide rail 41; the magnetizing piece corresponds to a clamping component 42 which is opposite to the main shaft 5; the magnetizing members are provided with a plurality of pairs, the annular guide rail 41 is turned over by a larger angle after the cutter 43 is mounted on the main shaft 5, so that the mounting wall 423 of the clamping assembly 42 which does not clamp the cutter 43 is abutted against the magnetizing members, the magnetizing members and the mounting wall 423 form a large magnet, and the attraction force of the magnet to the driving plate 4251 is larger than that of the magnet 51 to the driving plate 4251; after each time the annular guide rail 41 attaches a pair of magnetism adding pieces to the clamping assembly, the next pair of magnetism adding pieces can be transmitted to the original magnetism adding pieces through the conveying device; the delivery device herein is a conventional means for a person skilled in the art and is not described in detail herein.
Claims (7)
1. A double-spindle drilling and tapping center without stopping rotary tool changing is characterized in that: comprising the following steps:
the bridge plate module (1) comprises a bridge plate for bearing the clamp and the workpiece, an X-axis drive for driving the bridge plate to move on an X axis and a Y-axis drive for driving the bridge plate to move on a Y axis;
the upright post module (2) comprises a main shaft (5) for clamping the knife handle and a Z-axis drive for driving the main shaft (5) to move on a Z axis;
the tool magazine module (4) comprises an annular guide rail (41), a plurality of clamping assemblies (42) which move around the annular guide rail (41), tools (43) clamped by the corresponding clamping assemblies (42) and clamping drives which drive the clamping assemblies (42) to move; the tool magazine module (4) is rotationally connected with the upright post module (2); the inner sides of a pair of clamping jaws (424) of the clamping assembly (42) are respectively provided with a plurality of freely rolling balls so as to enable a cutter (43) to have a self-rotating space when being clamped; the clamping assemblies (42) are respectively provided with a connecting unit (425) positioned at the outer side of the cutter (43), the connecting units (425) are in embedded clamping connection with key grooves of the cutter (43), and the connecting units (425) are detachably connected with the main shaft (5) so that the main shaft (5) drives the cutter (43) to rotate;
the clamping assembly (42) comprises a frame arm (421) directly or indirectly connected with the annular guide rail (41), a frame seat (422) connected with the end, far away from the annular guide rail (41), of the frame arm (421), a mounting wall (423) positioned in the middle of the frame seat (422), clamping jaws (424) respectively arranged on two sides of the frame seat (422), and a connecting unit (425) detachably connected to the upper side of the mounting wall (423); the end part of the clamping jaw (424) far away from the frame arm (421) is a clamping end, the clamping end at least comprises an arc section, and the balls are all positioned on the inner wall of the clamping end; the end part of the clamping jaw (424) close to the frame arm (421) is a rotating end, and the two rotating ends are connected through a spring; during clamping, the balls are all abutted against the outer side of the cutter (43), the springs are in a compressed state, and the clamping ends all have a tendency to be close to the cutter (43); the connecting unit (425) is clamped with the key groove of the cutter handle;
the connecting unit (425) comprises a driving plate (4251), a telescopic part, a bottom plate (4253) and a clamping key (4254); the driving plate (4251) is at least made of magnetic conductive materials, a magnetic piece (51) is arranged at the lower end face of the main shaft (5) positioned outside the mounting ring, and the magnetic piece (51) keeps attractive force on the driving plate (4251); the telescopic direction of the telescopic part is only the vertical direction; the bottom plate (4253) is detachably connected with the mounting wall (423); the clamping key (4254) is always embedded in the key groove of the cutter handle; when the tool is connected, the magnetic piece (51) is abutted with the driving plate (4251), the telescopic part is in the maximum extension state, the connection between the bottom plate (4253) and the mounting wall (423) is disconnected, and the clamping key (4254) is embedded in the key groove of the tool handle so that the main shaft (5) drives the tool (43) to rotate;
the tool changing drive (3) is positioned on the upper side of the upright post module (2), the output end of the tool changing drive (3) is rotationally connected with the tool magazine module (4), the output end of the tool changing drive (3) has telescopic capacity so that the tool magazine module (4) rotates to a position where at least one pair of tools (43) are positioned on the lower side of the corresponding spindle (5), and when the tool changing drive is positioned, the spindle (5) is coaxial with the corresponding tools (43).
2. The double spindle drill center of a non-stop converting tool according to claim 1, wherein: the clamping end comprises an oblique angle section and a circular arc section; the bevel angle section is connected with the end of the arc section, which is far away from the bracket arm (421); the bevel angle section is tangent to the arc section, and the bevel angle sections of the two clamping ends are mutually close to each other; when clamping, the two bevel sections are mutually close to each other to keep a distance, and the distance is smaller than the length of the connecting unit (425); the arc length of the arc section is at least greater than the arc length of the outer side surface of one half of the knife handle.
3. The double spindle drill center of a non-stop converting tool according to claim 2, wherein: the end of the bevel angle section, which is far away from the circular arc section, is provided with a flaring section; the two flared sections are disposed remote from each other.
4. The double spindle drill center of a non-stop converting tool according to claim 1, wherein: the telescopic part comprises a telescopic bag (4252), the bag wall of the telescopic bag (4252) is made of flexible or elastic materials, a supporting frame is arranged on the outer side of the telescopic bag (4252), and the supporting frame is made of rigid materials and has a structure which stretches in the vertical direction; the inner cavity of the telescopic bag (4252) is a closed air cavity, the inner cavity is provided with an air inlet (4255) and an air outlet (4256), and the air inlet (4255) and the air outlet (4256) are all unidirectional channels.
5. The double spindle drill center of a non-stop converting tool according to claim 1, wherein: the telescopic part comprises a telescopic bag (4252), the bag wall of the telescopic bag (4252) is made of flexible metal core strips, and the inner cavity of the telescopic bag (4252) is an open air cavity.
6. The double spindle drill center of a non-stop converting tool according to claim 1, wherein: the bottom plate (4253) is made of at least a magnetically conductive material; the mounting wall (423) is made of at least a magnetic material; the mounting wall (423) maintains an attractive force to the base plate (4253); the attractive force of the mounting wall (423) to the bottom plate (4253) is smaller than the attractive force of the magnetic member (51) to the driving plate (4251).
7. The double spindle drill center of a non-stop converting tool according to claim 1, wherein: the bottom plate (4253) is made of at least a magnetically conductive material; the mounting wall (423) is made of at least a magnetically conductive material; at least one pair of strong magnetic parts are arranged on the outer side of the annular guide rail (41), and the magnetism of the strong magnetic parts is stronger than that of the magnetic parts (51); after the cutter (43) is installed in the main shaft (5), the annular guide rail (41) is turned away from the main shaft (5), and the installation wall (423) of the corresponding clamping assembly (42) of the cutter (43) installed in the main shaft (5) is detachably abutted with the ferromagnetic component and magnetized; when the tool on the spindle (5) needs to be replaced, the attractive force of the mounting wall (423) to the bottom plate (4253) is larger than the attractive force of the magnetic piece (51) to the driving plate (4251), and the connection unit (425) is disconnected from the spindle (5) and is restored to be connected with the mounting wall (423).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211199544.6A CN115464447B (en) | 2022-09-29 | 2022-09-29 | Double-spindle drilling and tapping center without stopping rotary tool changing |
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| CN202211199544.6A CN115464447B (en) | 2022-09-29 | 2022-09-29 | Double-spindle drilling and tapping center without stopping rotary tool changing |
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| CN115464447B true CN115464447B (en) | 2024-04-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117102933B (en) * | 2023-10-16 | 2023-12-29 | 综欣工业装备(潍坊)有限公司 | Disc type automatic tool magazine |
| CN117415656B (en) * | 2023-12-06 | 2024-02-13 | 江苏华力精密机械有限公司 | Tool bit switching device of CNC machining center |
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| EP0255567A1 (en) * | 1986-07-29 | 1988-02-10 | MAHO Aktiengesellschaft | Changing tool for a universal drilling and milling machine |
| JP2006305663A (en) * | 2005-04-27 | 2006-11-09 | Brother Ind Ltd | Automatic tool changer |
| TW200902225A (en) * | 2007-07-10 | 2009-01-16 | Pascal Eng Corp | Tool exchanging device |
| CN209050467U (en) * | 2018-11-06 | 2019-07-02 | 浙江理工大学瓯海研究院有限公司 | A kind of cutter-exchange mechanism |
| CN114211284A (en) * | 2021-12-22 | 2022-03-22 | 浙江劲帆机床科技有限公司 | Double-spindle drilling and tapping center |
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2022
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0255567A1 (en) * | 1986-07-29 | 1988-02-10 | MAHO Aktiengesellschaft | Changing tool for a universal drilling and milling machine |
| JP2006305663A (en) * | 2005-04-27 | 2006-11-09 | Brother Ind Ltd | Automatic tool changer |
| TW200902225A (en) * | 2007-07-10 | 2009-01-16 | Pascal Eng Corp | Tool exchanging device |
| CN209050467U (en) * | 2018-11-06 | 2019-07-02 | 浙江理工大学瓯海研究院有限公司 | A kind of cutter-exchange mechanism |
| CN114211284A (en) * | 2021-12-22 | 2022-03-22 | 浙江劲帆机床科技有限公司 | Double-spindle drilling and tapping center |
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