CN110744321A - Model changing positioning method and model changing positioning mechanism - Google Patents
Model changing positioning method and model changing positioning mechanism Download PDFInfo
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- CN110744321A CN110744321A CN201911088012.3A CN201911088012A CN110744321A CN 110744321 A CN110744321 A CN 110744321A CN 201911088012 A CN201911088012 A CN 201911088012A CN 110744321 A CN110744321 A CN 110744321A
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- 238000003825 pressing Methods 0.000 claims description 75
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- 238000003754 machining Methods 0.000 description 6
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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
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
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Abstract
The invention discloses a model changing positioning method and a model changing positioning mechanism, comprising the following steps: the method comprises the following steps that firstly, two corresponding positioning devices are arranged, each positioning device is provided with a plurality of limiting points which are distributed in a centering surrounding mode and can be adjusted, the centers of the two positioning devices are consistent with the central axis of a workpiece, and the positioning devices are arranged to set the limiting points to the positions corresponding to the outer wall of the workpiece; setting a positioning device to drive two positioning devices, taking the difference of the outer diameters of the workpiece before and after the shape change as the moving distance of the positioning device for driving the positioning device to adjust the position along the radial direction of the positioning device, and driving the positioning device to adjust the position along the radial direction according to the increase or decrease of the outer diameters of the workpiece before and after the shape change by the positioning device; and thirdly, loading the workpiece after the model changing into a positioning device, supporting, blocking or clamping the workpiece by the positioning device through a limit point, wherein the position of a certain point on the outer wall of the workpiece after the model changing is consistent with that before the model changing. The workpiece model changing and positioning device can effectively reduce time and labor consumption caused by repositioning due to workpiece model changing, and improve the operating efficiency of workpiece model changing and positioning.
Description
Technical Field
The invention relates to the field of machining, in particular to a positioning device for machining, and specifically relates to a model changing positioning method and a model changing positioning mechanism.
Background
In the mechanical processing, the workpiece needs to be fixed and limited, generally, the workpiece is fastened by a clamp, and the workpiece is subjected to a high-strength fastening external force, so the method is only suitable for the workpiece with high rigidity, but the workpiece with low rigidity, such as the workpiece with a hollow structure, a thin-wall structure or a shell structure like a tube type, a tube type and a coil type, for example, a long workpiece with a tube type, a tube type and a groove type thin-shell structure is formed by bending, bending or coiling a sheet-shaped or plate-shaped raw material and then welding, riveting or nailing, and the like, or a solid long workpiece with low strength, such as a strip type and a column type, needs to be subjected to processes such as spraying, photoetching and the like, and in these cases, the positioning needs to be carried out in a low-contact-force limiting mode, so the workpieces need to.
At present, a fixing device or a positioning mode applied by the device can only be suitable for workpieces with single size, meanwhile, machining points of the device are mostly at the peripheral position or the position deviated from the center of the workpiece, when equipment needs to replace workpieces with different sizes for machining, fixed dies or clamps and the like need to be replaced at the same time, and adjustment and correction are correspondingly carried out, obviously, certain time cost and labor cost are needed, and automatic adaptation of the same equipment to workpieces with different sizes cannot be well realized.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a model changing positioning method and a model changing positioning mechanism, which can realize model changing positioning at any time, do not need to change a model for model changing, and do not need to perform complicated operations such as related adjustment and calibration.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the model changing positioning method comprises the following steps: the method comprises the following steps that firstly, two corresponding positioning devices are arranged, each positioning device is provided with a plurality of limiting points which are distributed in a centering surrounding mode and can be adjusted, the centers of the two positioning devices are consistent with the central axis of a workpiece, and the positioning devices are arranged to set the limiting points to the positions corresponding to the outer wall of the workpiece; setting a positioning device to drive two positioning devices, taking the difference of the outer diameters of the workpiece before and after the shape change as the moving distance of the positioning device for driving the positioning device to adjust the position along the radial direction of the positioning device, and driving the positioning device to adjust the position along the radial direction according to the increase or decrease of the outer diameters of the workpiece before and after the shape change by the positioning device; and thirdly, loading the workpiece after the model changing into a positioning device, supporting, blocking or clamping the workpiece by the positioning device through a limit point, wherein the position of a certain point on the outer wall of the workpiece after the model changing is consistent with that before the model changing.
The replaceable positioning mechanism comprises a positioning device and a positioning device; the positioning device is provided with a plurality of positioning points which are distributed around the center and can be adjusted; the positioning device can synchronously and consistently drive the two positioning devices to move.
The positioning device comprises a positioning ring and a limiting part, and the positioning ring is vertically arranged and connected with the positioning device; the plurality of limiting parts are distributed on the positioning ring in an equidistance surrounding manner, each limiting part can be radially adjusted along the positioning ring, and one end of the limiting part opposite to the center of the positioning ring is a limiting point used for abutting against a workpiece.
The positioning device also comprises a driving ring which is rotatably arranged on the positioning ring, the driving ring is in spiral transmission connection with the limiting piece, and the limiting piece is in sliding connection with the positioning ring; the locating part is slidably mounted on the sliding groove of the locating ring.
The positioning device further comprises a driver, the outer wall of the driver is fixedly connected with the positioning ring, the driving ring is a toothed ring, and the driver correspondingly extends out of a driving rotating shaft with a gear and is in threaded connection with the side wall of the driving ring.
The end of the limiting part is provided with a butt-joint rod, the butt-joint rod is parallel to the axis of the positioning ring, one end of the butt-joint rod is arranged on the limiting part and extends outwards, and the outward end of the butt-joint rod extends outwards along the radial direction in an inclined mode.
The positioning device comprises lifters, lifting seats for supporting and connecting the positioning devices are arranged on the lifters, each positioning device is connected with one lifter, and the two lifters are driven by a motor or a motor synchronously.
The positioning device further comprises a guide post and a guide sleeve, the guide post is vertically arranged, the guide sleeve is sleeved with the guide post in a sliding mode, and the positioning device is connected with the guide sleeve.
Removable type positioning mechanism, its characterized in that: the pressing device is arranged between the two positioning devices and provided with pressing positions, and at least two pressing positions of the pressing device are distributed around the central shaft of the positioning devices.
The pressing device comprises a connecting rod and a pressing assembly, the connecting rod is parallel to the center line of the positioning device, two ends of the connecting rod are respectively connected with the two positioning devices, the connecting rod can move along with the two limiting points corresponding to the two positioning devices to adjust the position, and the pressing assembly is arranged on the connecting rod.
The invention has the beneficial effects that: the model changing positioning method and the model changing positioning mechanism can flexibly perform model changing and positioning at any time so as to match different sizes of the workpiece after model changing for positioning, and meanwhile, the mould changing and the related complex and complicated adjustment and calibration are not needed during model changing, so that the time and labor consumption caused by repositioning due to the model changing of the workpiece are effectively reduced, and the operating efficiency of the model changing and positioning of the workpiece is greatly improved. Moreover, the two positioning devices of the replaceable positioning mechanism can synchronously carry out positioning, and the limiting points of the two positioning devices can synchronously carry out expansion and contraction.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of an installation structure of an embodiment of the present invention;
FIG. 2 is a partially exploded view of the mounting structure of the embodiment of FIG. 1;
FIG. 3 is a schematic structural diagram of an embodiment of the positioning device of the present invention;
FIG. 4 is a schematic diagram of a configuration of an embodiment of a clamping assembly of the present invention;
FIG. 5 is a schematic view of a connection structure of a local position limiting member and a connecting rod according to the present invention;
FIG. 6 is a schematic axial view of a positioning process after a workpiece is reshaped according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention relates to a model changing positioning method corresponding to a long workpiece with a regular cross section, which comprises the following steps: the method comprises the following steps that firstly, a front positioning device and a rear positioning device which correspond to each other are arranged, the positioning devices are provided with a plurality of limiting points which are distributed around the workpiece in a centering mode and can be adjusted, the centers of the two positioning devices are consistent with the central axis of the workpiece, and the positioning devices are arranged to limit the limiting points to the positions corresponding to the outer wall of the workpiece; setting a positioning device to drive two positioning devices, taking the difference of the outer diameters of the workpiece before and after the shape change as the moving distance of the positioning device for driving the positioning device to adjust the position along the radial direction of the positioning device, and driving the positioning device to adjust the position along the radial direction according to the increase or decrease of the outer diameters of the workpiece before and after the shape change by the positioning device; and thirdly, loading the workpiece after the model changing into a positioning device, supporting, blocking or clamping the workpiece by the positioning device through a limit point, wherein the position of a certain point on the outer wall of the workpiece after the model changing is consistent with that before the model changing.
Referring to fig. 6, for example, the workpiece is changed to a size with a smaller outer diameter, the position of any position on the outer wall of the workpiece after the change is different from the position of the same position on the outer wall of the workpiece before the change by a distance d, that is, the outer diameter of the workpiece is reduced by 2d, therefore, in order to match the workpiece after the change, the positioning device moves a plurality of positioning points around distributed limiting points to the center by the distance d, then the positioning device drives the positioning device to move upward along the radial direction by the distance d, so that the position of the outer wall on the upper side of the workpiece in the positioning device is consistent with the position before the change, similarly, the positioning device drives the positioning device to move leftward along the radial direction by the distance d, the position of the outer wall on the left side of the workpiece in the toilet is consistent with the position before the change, obviously, no matter the workpiece is the workpiece with the cross-sectional shape of a circular, rectangular or regular polygon, the cross section, any point of the outer wall is changed due to the increase or, therefore, most of machining processes start to process the surface of a workpiece, the size of the workpiece is changed immediately, the method can be used for quickly positioning the model change, a special positioning die is not needed by a positioning device, and any adjustment is not needed after the model change.
Furthermore, each limit point of the positioning device moves along the radial direction to adjust the position, the limit points are consistent with the center position of the positioning device, the limit points of the front positioning device and the rear positioning device are synchronously set with positions, and the positioning devices synchronously drive the two positioning devices to adjust the position through a linkage mechanism, so that a workpiece is loaded in the positioning devices, the limit points of the positioning devices can be expanded and contracted simultaneously to finely adjust the bearing, blocking or clamping of the workpiece, the positioning devices can also enable the positioning devices to integrally adjust the position synchronously, the workpiece is not required to be loaded after the two positioning devices adjust the position, and the flexibility is stronger; the positioning device is driven by the position adjusting device in a linkage manner, so that the synchronous and corresponding consistency of the positions of the two positioning devices can be ensured, and the dislocation of the two positioning devices in the position adjusting process is avoided.
Furthermore, the limit points of the positioning device are connected and synchronously driven through a linkage mechanism, the linkage mechanism takes a mechanical structure as the optimization, and the limit points of the positioning device are driven by the mechanical linkage mechanism to keep the distance from each point to the center to be the same.
And a pressing device is arranged between the two positioning devices and abuts against the middle section of the workpiece loaded on the positioning devices through at least two pressing positions distributed around the central shaft of the positioning devices. The middle part of the long workpiece is supported, blocked or clamped by the aid of the positioning device, and positioning performance and application range can be further improved.
The opposite limit points of the two positioning devices are rigidly connected with each other, and the limit points of the two positioning devices are correspondingly linked to ensure that the limit points of the two positioning devices are always synchronous and consistent
And further, the limiting points corresponding to the two positioning devices are rigidly connected through a pressing device, the pressing position of the pressing device is close to or far away from the outer wall of the workpiece along with the movement of the limiting point, the limiting point enables the pressing position and the limiting point to move along the radial direction under the rigid connection effect of the positioning devices, each group of corresponding limiting points of the two positioning devices can be connected through one limiting device, and each limiting device is provided with at least one pressing position.
Referring to fig. 1 and 2, the positioning mechanism of the present invention comprises a positioning device and a positioning device; the positioning devices are provided with a plurality of positioning points which are centered, distributed around and can be adjusted, and the positions of the positioning points can be synchronously adjusted by the two positioning devices so as to adapt to hollow workpieces such as cylindrical, coiled and tubular workpieces or solid workpieces such as strip-shaped and columnar workpieces; the positioning device can synchronously and consistently drive the two positioning devices to move along the radial direction; the two positioning devices of the replaceable positioning mechanism respectively limit the position of a workpiece in a supporting, blocking, narrowing clamping mode and the like in tandem or head-to-tail mode, the workpiece is horizontally arranged, the outer diameter size of the workpiece before and after the replacement is changed, each limit point of the positioning devices is adjusted along with the position of the workpiece, the positions of the limit points are concentric with each other and the center of the limit points is unchanged, the position adjusting devices are matched to drive the two positioning devices to change the positions of the two positioning devices, for example, the value which is reduced or increased along with the outer radius of the workpiece is correspondingly increased or reduced through the position adjusting devices, the highest position of the outer wall of the workpiece can be kept unchanged, in the same way, the value which is increased or reduced along with the outer radius of the workpiece is correspondingly increased or reduced through the position adjusting devices, the lowest position of the outer wall of the workpiece can be kept unchanged, or the horizontal positions of any side of the outer walls of the workpieces with different sizes can be kept unchanged in the positioning devices in the same mode, therefore, the, the positioned die does not need to be replaced every time of model replacement, and the workpiece does not need to be calibrated and adjusted to correspond to the machining position of the workpiece; the positioning device can directly realize a plurality of limit points by a plurality of pneumatic cylinders, hydraulic cylinders and the like, and can also be realized by a mechanism such as a mandril and a clamping mechanism, meanwhile, the two positioning devices can synchronously control the independent operation of respective position adjustment of the limit points through a control system, and can also realize the linkage execution of the respective position adjustment by utilizing a linkage structure, and the position adjusting device can directly drive the positioning device to realize the movement for the hydraulic cylinders, the pneumatic cylinders and the like, and can also drive a driving mechanism to drive the positioning device to move for a motor, for example, a transmission structure of a screw mechanism.
The positioning device comprises a positioning ring 11 and a limiting piece 12, and the positioning ring 11 is vertically arranged and connected with the positioning device; the limiting pieces 12 are distributed on the positioning ring 11 in an equidistant and surrounding manner, each limiting piece 12 can be synchronously adjusted along the positioning ring 11 in a radial direction, and one end of each limiting piece 12 opposite to the center of the positioning ring 11 is a limiting point for abutting against a workpiece; the positioning ring 11 is of an annular structure, the central part of the positioning ring is hollow, a workpiece and other mechanisms can pass through the positioning ring, the positioning ring can be suitable for hollow tubular workpieces, cylindrical workpieces or solid workpieces, the limiting part 12 can directly utilize a hydraulic rod or a pneumatic rod to realize clamping of telescopic advancing and retreating, the limiting part 12 can also be driven by a motor through a gear rack structure or a gear screw structure, the positioning device can be a hydraulic lifting device or a spiral lifting device, the two positioning devices can be respectively connected with a positioning device to carry out synchronous lifting, and can also be connected with the same positioning device to move, and in addition, the positioning device can also utilize the motor to be connected with a gear rack or a hydraulic and pneumatic mechanism to drive the positioning ring; the positioning device adjusts the outer diameter sizes of different corresponding workpieces through the radial movement of the limiting part 12 on the positioning ring 11, the workpieces and the center positions of the positioning device are kept consistent before and after the model change, and the positions of the upper or lower end, the left end or the right end, or other radial positions of the workpieces before and after the model change can be correspondingly kept consistent only by driving the positioning ring 11 to carry out the corresponding radial movement of rising or lowering, left or right transverse movement, or non-longitudinal and transverse movement corresponding to the radius change of the workpieces before and after the model change by the positioning device, so that the positioning die does not need to be replaced again due to the model change, and even the position, the size and the like are calibrated and adjusted; the limiting parts 12 are used as a supporting part, a bearing part or a butting part for realizing limiting points, the limiting parts 12 only need to be radially inwards or outwards adjusted to corresponding positions along the positioning rings 11, workpieces with corresponding sizes can be correspondingly placed, then the clamping workpieces are synchronously and centripetally moved, the shape change is quite flexible, the end part of each limiting part 12 opposite to the center of the positioning ring 11 can be spherical, arc-shaped or other shapes so as to correspond to the shape and the structure of the workpieces to be butted, and the positions of the limiting parts 12 are distributed and matched with the shapes of the corresponding end parts to form the positioning of the corresponding workpieces.
The positioning device further comprises a driving ring 13, the driving ring 13 is concentrically and rotatably arranged on the positioning ring 11, the driving ring 13 is in spiral transmission connection with the limiting piece 12, and the limiting piece 12 is in sliding connection with the positioning ring 11; the driving ring 13 can be matched with the latch, the pin shaft or the guide post of the limiting part 12 through a spiral groove or a curved groove to perform spiral transmission, the positioning ring 11 is provided with a radially extending sliding groove matched with the sliding connection of the limiting part 12, the limiting part 12 is slidably mounted on the sliding groove of the positioning ring 11, and the cross section of the limiting part 12 is in an I shape, so that the limiting part 12 can only slide along the sliding groove of the positioning ring 11; the driving ring 13 is movably sleeved on the annular wall protruding in the axial direction of the positioning ring 11, and can also be slidably embedded in the inner side of the positioning ring 11, the driving ring 13 can be driven to rotate by a motor or a transmission mechanism, and then the rotation of the driving ring is converted into the linear motion of the limiting piece 12, the mechanism of the mechanism is the same as that of a common three-jaw chuck, so that the connection example of the driving ring 13 and the limiting piece 12 is omitted in the drawing, the limiting piece 12 is driven by the rotation of the driving ring 13, that is, all the limiting pieces 12 are driven simultaneously, and the driving ring.
The positioning device also comprises a driver 14, the outer wall of the driver 14 is fixedly connected with the positioning ring 11, the driving ring 13 is a toothed ring, the driver 14 correspondingly extends out of a driving rotating shaft assembly with a gear and is in threaded connection with the side wall of the driving ring 13, the driver 14 can be a rotating shaft direct connection of a servo motor or a middle part of the rotating shaft direct connection passes through a reduction box and then passes through the gear driving ring 13, as shown in the figure, the tooth surface of the driving ring 13 is preferably designed into an outer side ring surface, and the driver 14 is engaged and driven from the outer side of the driving ring 13, so that the; all parts of the positioning device are integrated on the positioning ring 11, and the positioning device can move by moving the positioning ring 11, so that the module body consisting of all parts can conveniently move together, and the influence of the dispersion of the components on the position movement of the positioning device is avoided.
The end of the limiting member 12 is provided with a butt rod 121, the butt rod 121 is parallel to the axis of the positioning ring 11, one end of the butt rod 121 is installed on the limiting member 12 and extends outwards, the outward end of the butt rod 121 extends outwards in a radial and oblique direction, the butt rod 121 uses a rod body as a butt surface, when the workpiece is installed, the workpiece passes through the positioning ring 11 from the outer side of one positioning device along the axial direction, the butt rod 121 serves as a bearing and gear component and contacts the outer wall of the workpiece at a low pressure in a limiting manner, meanwhile, an outward-expanding horn mouth formed by each butt rod 121 can be guided into the workpiece and aligned to the two positioning devices, the butt rod 121 can be preferably a round rod, and a plurality of round rod bodies can be directly applied; preferably, each positioning ring 11 has an even number of limiting members 12 symmetrically distributed left and right, and each two opposite limiting members 12 are located on the same radial straight line, so that the workpiece with multiple symmetrical shapes, such as a circle, a rectangle, a regular polygon, and the like, can be better adaptively limited.
The positioning device comprises lifters 21, a lifting seat for supporting and connecting the positioning devices is arranged on each lifter 21, each positioning device is respectively connected with one lifter 21, the two lifters 21 are synchronously driven by a motor or a motor, the lifters 21 generally adopt a spiral transmission mechanism with the same jack mechanism, the bottoms of the positioning devices or the positioning rings 11 can be connected to the lifting seat of the lifter 21 to move along with the lifting, because the two positioning devices are separated by a certain distance, preferably, a single lifter 21 can simultaneously support the two positioning rings 11 through the lifting seat, or a more complex structure is needed to keep the two positioning devices to simultaneously and stably lift, therefore, preferably, one lifter 21 is respectively used for driving one positioning device, the two lifters 21 are respectively connected to one commutator 22 through transmission shafts, and then are connected with one motor or a motor through the commutator 22 for transmission connection, and the two lifters 21 do not need to be respectively connected with the two motors or the two motors, as shown in the figure, a lifting motor 25 is connected with the commutator 22 and located between the two positioning devices, and meanwhile, two sides of the commutator 22 are respectively connected with and driven by the lifter 21 through a driving connecting shaft, so that the synchronous operation can be realized, and the structure can be kept simple.
The positioning device further comprises a guide post 23 and a guide sleeve 24, the guide post 23 is vertically arranged along the lifting direction of the lifter 21, the guide sleeve 24 is slidably sleeved on the guide post 23, the positioning device is connected with the guide sleeve 24, the two sides of the positioning ring 11 are preferably and respectively connected with the guide sleeve 24, the guide sleeve 24 is respectively slidably sleeved on the two guide posts 23 of the stand 9, of course, the guide post 23 can also be of a stand column structure without being supported by the stand 9, when the lifter 21 drives the positioning ring 11 to lift, the guide post 23 is matched with the guide post 23 to enable the positioning ring 11 to stably and accurately lift.
The replaceable positioning mechanism also comprises a pressing device, the pressing device is positioned between the two positioning devices, the pressing device is provided with a movable pressing position for abutting against the middle section of the workpiece, the pressing positions of the pressing device are preferably at least two and distributed around the central shaft of the positioning device, when the workpiece enters the positioning mechanism and is limited by the positioning device, the pressing device applies force to the workpiece at the position between the positioning devices to press the workpiece, the middle section pressing position support can be provided for the workpiece with lower integral rigidity, the pressing device can realize pressing movement of the pressing positions by a general hydraulic and pneumatic driven pressing mechanism or a fixture mechanism, such as telescopic pressing of a hydraulic rod, and such as a double-sided and multi-sided clamping mechanism driven by a multi-hydraulic rod or a pull rod.
The pressing device comprises a connecting rod 31 and a pressing component 32, the connecting rod 31 is parallel to the center line of the positioning device, two ends of the connecting rod 31 are respectively connected with the two positioning devices, the connecting rod 31 can move along with two limit points corresponding to the two positioning devices to adjust the position, one side or one end of the pressing component 32 opposite to and abutted against the workpiece is a pressing position of the pressing device, the pressing component 32 can be an abutting block structure or an abutting point structure, and the pressing component 32 is installed on the connecting rod 31; the positioning rings 11 of the two positioning devices are respectively provided with a plurality of corresponding limiting parts 12, so a plurality of connecting rods 31 are preferably respectively connected with the two corresponding limiting parts 12, and the limiting parts 12 of the front and rear positioning rings 11 move synchronously to adjust the positions; the pressing component 32 can be installed on the connecting rod 31 at a required position according to the shape, stress and other factors of the workpiece, the pressing component 32 can be distributed in a plurality of numbers around the central line, namely the workpiece, or distributed in a plurality of numbers along the connecting rod 31, so that enough pressing abutment can be provided from the annular and axial positions, the pressing component 32 can approach or depart from the workpiece along with the connecting rod 31 and the limiting part 12, and meanwhile, the pressing component 32 can drive the pressing component 32 to abut against the workpiece through a telescopic mechanism such as hydraulic pressure, a pneumatic cylinder or a motor connecting screw rod.
The pressing assembly 32 comprises a fixed frame 321, a jacking member 322 and a power cylinder 323, the fixed frame 321 is fixedly connected with the connecting rod 31 and the power cylinder 323 respectively, the jacking member 322 is connected with a piston rod of the power cylinder 323, one end of the jacking member 322 faces to the center line of the positioning device and corresponds to a jacking workpiece, the power cylinder 323 drives the jacking member 322 to move towards the workpiece and realize jacking, the pressing assembly 32 takes the fixed frame 321 as a base to fix the power cylinder 323, the power cylinder 323 drives the jacking member 322 to jack and retreat towards the workpiece, the pressing assembly 32 is in active pressing, and pressing is more flexible and accurate.
The pressing component 32 is in a shape of a portal frame, two ends of the fixed frame 321 are respectively provided with a connecting plate 3211 vertically connected with the connecting rod 31, the top pressing component 322 is positioned between the lower side of the fixed frame 321 and the connecting rod 31, the power cylinder 323 is arranged on the upper side surface of the fixed frame 321, a piston rod of the power cylinder 323 passes through an opening of the fixed frame 321 and is connected with the top pressing component 322, two ends of the top pressing component 322 are respectively provided with a top pressing block 3221, the top pressing block 3221 is in an arch-like shape, the middle part of the top pressing block 3221 is an abdicating notch corresponding to the abdicating connecting rod 31, the lower ends of two sides of the top pressing block 3221 are respectively provided with a top pressing rod 3222 used for abutting against a workpiece, at least two top pressing rods 3222 of one pressing component 32 are respectively positioned on two sides of the connecting rod 31 and are parallel to the connecting rod 31, the connecting rod 31 passes through the connecting plate 3211 at one end of the fixed frame 321, the connecting rod 31 is respectively, the top pressure piece 322 is driven by the power cylinder 323, the top pressure piece 322 can move up and down in the space between the fixed frame 321 and the connecting rod 31, when the top pressure piece 322 moves down, the arched notch in the middle of the top pressure block 3221 matches with the abdicating connecting rod 31, so that the position conflict between the top pressure block 3221 and the connecting rod 31 is avoided, the top pressure rod 3222 moves along with the top pressure piece 322 to perform top pressure butt joint on the workpiece at two pressing positions, and the two rod bodies can be correspondingly suitable for the surfaces of workpieces in various shapes in a butt joint mode.
The top pressure element 322 is provided with two guide rods 3223 extending towards the fixed frame 321, the fixed frame 321 is provided with two sleeves 3212 which are correspondingly sleeved with the guide rods 3223, the upper surface of the fixed frame 321 is rectangular, the guide rods 3223 and the sleeves 3212 are respectively arranged on two sides of the power cylinder 323 in a linear array, the guide rods 3223 penetrate through the sleeves 3212 from the lower side of the fixed frame 321 for sliding fit, and the top pressure element 322 is guided to move stably in a reciprocating manner.
Referring to fig. 5, a rod seat 122 for installing a rod body is disposed at the end of the limiting member 12, one side of the rod seat 122 is connected to the limiting member 12, recessed ports connected to the abutting rod 121 and the connecting rod 31 respectively are disposed at the lower end of the rod seat 122, the ends of the abutting rod 121 and the connecting rod 31 are opposite and flush with a side wall surface facing the center of the positioning device, the outer diameter of the abutting rod 121 is smaller than that of the connecting rod 31, the recessed port of the rod seat 122 is segmented into a segment, one segment is higher in position and smaller in inner diameter, the other segment is lower in position and larger in inner diameter, the abutting rod 121 and the connecting rod 31 are respectively assembled on two sides and flush with a side surface of the abutting, except for a limiting point connected to the two positioning devices, the connecting rod 31 is used as an extension of the abutting.
The connecting plate 3211 is a split component vertically connected to the lower side of the end of the fixed frame 321, the connecting plate 3211 penetrates the fixed frame 321 through a bolt or a screw to be fastened and connected, a gap which divides the connecting plate 3211 into two parts and facilitates deformation is reserved between the middle section and the tail end of the connecting plate 3211, meanwhile, the tail end of the connecting plate 3211 is provided with an arc-shaped clamping opening for clamping the connecting rod 31, and a matching bolt penetrates the middle section of the connecting plate 3211 transversely to draw the two parts so as to clamp the connecting rod 31; similarly, the pressing block 3221 is also an independent component and is vertically fastened and connected to two ends of the pressing member 322 through a bolt and a screw, the tail end of the pressing block 3221 is also provided with an arc-shaped clamping opening for clamping the pressing rod 3222, a gap which divides the tail end of the pressing block 3221 into two parts and facilitates slight deformation is similarly reserved between the middle section and the tail end of the pressing block 3221, and the pressing rod 3222 is clamped by the bolt which is matched with the bolt to transversely penetrate through the middle section of the connecting pressing block 3221 and pull the two parts together; the fixed frame 321 and the connecting plate 3211, and the pressing member 322 and the pressing block 3221 may also be integrally formed components.
The pressing device further comprises an alignment assembly 33, the alignment assembly 33 is mounted on the connecting rod 31, the alignment assembly 33 has a movable blocking portion, the positioning assembly is set at a position close to one of the positioning devices, the blocking portion blocks movement of the workpiece along the central line direction of the positioning device, the blocking portion can be moved away from the blocking area before loading the workpiece or during unloading the workpiece, so that the workpiece can be conveniently moved in and out or loaded and unloaded, and the blocking portion of the alignment assembly 33 can be implemented by a blocking component which can rotate back and forth, swing or stretch, such as a hinge piece which can only rotate around the connecting rod 31, or a lock pin which can extend out of the connecting rod 31.
The aligning component 33 comprises a connecting frame 331 and an air cylinder 332, one end of the connecting frame 331 is clamped with the connecting rod 31 through a clamping piece, the air cylinder 332 is fixedly installed on the connecting frame 331, a blocking piece serving as a blocking part is installed at the tail end of a piston rod of the air cylinder 332, a guide hole matched with the piston rod which penetrates through the air cylinder 332 in a sliding mode is further formed in the connecting frame 331, the air cylinder 332 drives the blocking piece to move back and forth into the positioning device, a workpiece is loaded on the clamping mechanism and needs to move along a central line so as to reach a corresponding position, the blocking piece is pushed out by the aligning component 33 through the air cylinder 332 before the workpiece is loaded, one end of the workpiece after being loaded is abutted against the blocking piece so as to be blocked as a reference position, when the workpiece is unloaded, the blocking piece.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.
The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments, and the technical effects of the present invention can be achieved by any similar or identical means, which fall within the protection scope of the present invention.
Claims (10)
1. The model changing positioning method is characterized by comprising the following steps: the method comprises the following steps that firstly, two corresponding positioning devices are arranged, each positioning device is provided with a plurality of limiting points which are distributed in a centering surrounding mode and can be adjusted, the centers of the two positioning devices are consistent with the central axis of a workpiece, and the positioning devices are arranged to set the limiting points to the positions corresponding to the outer wall of the workpiece; setting a positioning device to drive two positioning devices, taking the difference of the outer diameters of the workpiece before and after the shape change as the moving distance of the positioning device for driving the positioning device to adjust the position along the radial direction of the positioning device, and driving the positioning device to adjust the position along the radial direction according to the increase or decrease of the outer diameters of the workpiece before and after the shape change by the positioning device; and thirdly, loading the workpiece after the model changing into a positioning device, supporting, blocking or clamping the workpiece by the positioning device through a limit point, wherein the position of a certain point on the outer wall of the workpiece after the model changing is consistent with that before the model changing.
2. Removable type positioning mechanism, its characterized in that: comprises a positioning device and a positioning device; the positioning device is provided with a plurality of positioning points which are distributed around the center and can be adjusted; the positioning device can synchronously and consistently drive the two positioning devices to move.
3. The interchangeable positioning mechanism of claim 2, wherein: the positioning device comprises a positioning ring and a limiting part, and the positioning ring is vertically arranged and connected with the positioning device; the plurality of limiting parts are distributed on the positioning ring in an equidistance surrounding manner, each limiting part can be radially adjusted along the positioning ring, and one end of the limiting part opposite to the center of the positioning ring is a limiting point used for abutting against a workpiece.
4. The interchangeable positioning mechanism of claim 3, wherein: the positioning device also comprises a driving ring which is rotatably arranged on the positioning ring, the driving ring is in spiral transmission connection with the limiting piece, and the limiting piece is in sliding connection with the positioning ring; the locating part is slidably mounted on the sliding groove of the locating ring.
5. The interchangeable positioning mechanism of claim 4, wherein: the positioning device further comprises a driver, the outer wall of the driver is fixedly connected with the positioning ring, the driving ring is a toothed ring, and the driver correspondingly extends out of a driving rotating shaft with a gear and is in threaded connection with the side wall of the driving ring.
6. The interchangeable positioning mechanism of any of claims 3 to 5, wherein: the end of the limiting part is provided with a butt-joint rod, the butt-joint rod is parallel to the axis of the positioning ring, one end of the butt-joint rod is arranged on the limiting part and extends outwards, and the outward end of the butt-joint rod extends outwards along the radial direction in an inclined mode.
7. The interchangeable positioning mechanism of any of claims 2 to 5, wherein: the positioning device comprises lifters, lifting seats for supporting and connecting the positioning devices are arranged on the lifters, each positioning device is connected with one lifter, and the two lifters are driven by a motor or a motor synchronously.
8. The interchangeable positioning mechanism of claim 7, wherein: the positioning device further comprises a guide post and a guide sleeve, the guide post is vertically arranged, the guide sleeve is sleeved with the guide post in a sliding mode, and the positioning device is connected with the guide sleeve.
9. The interchangeable positioning mechanism of any of claims 2 to 5, wherein: the pressing device is arranged between the two positioning devices and provided with pressing positions, and at least two pressing positions of the pressing device are distributed around the central shaft of the positioning devices.
10. The interchangeable positioning mechanism of claim 9, wherein: the pressing device comprises a connecting rod and a pressing assembly, the connecting rod is parallel to the center line of the positioning device, two ends of the connecting rod are respectively connected with the two positioning devices, the connecting rod can move along with the two limiting points corresponding to the two positioning devices to adjust the position, and the pressing assembly is arranged on the connecting rod.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911088012.3A CN110744321A (en) | 2019-11-08 | 2019-11-08 | Model changing positioning method and model changing positioning mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911088012.3A CN110744321A (en) | 2019-11-08 | 2019-11-08 | Model changing positioning method and model changing positioning mechanism |
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| CN110744321A true CN110744321A (en) | 2020-02-04 |
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| CN201911088012.3A Pending CN110744321A (en) | 2019-11-08 | 2019-11-08 | Model changing positioning method and model changing positioning mechanism |
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