CN107309686B - Large workpiece clamping device and clamping system - Google Patents
Large workpiece clamping device and clamping system Download PDFInfo
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- CN107309686B CN107309686B CN201710684541.4A CN201710684541A CN107309686B CN 107309686 B CN107309686 B CN 107309686B CN 201710684541 A CN201710684541 A CN 201710684541A CN 107309686 B CN107309686 B CN 107309686B
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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
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention provides a large workpiece clamping device, which comprises a circular clamp body, wherein an inner ring of the clamp body is provided with a mounting groove for mounting a plurality of detachable clamping units; the clamping unit comprises a clamping executing device and a clamping driving device, wherein the clamping driving device is connected with the clamping executing device and is used for driving the clamping executing device to move in the axial direction and/or the radial direction of the circular ring of the clamp body; each clamping executing device is circumferentially distributed along the inner ring of the clamp body; each clamping driving device comprises a driving device connecting part fixedly connected with the clamp body; the invention also provides a large workpiece clamping system, which comprises the large workpiece clamping device and a bearing platform, wherein the bearing platform is provided with a support base in parallel; the support base is provided with a rolling bearing groove matched with the outer edge of the clamp body. The invention has the advantages that: the floating clamping is realized, the central position of the workpiece is not required to be repeatedly adjusted when the workpiece is clamped, an additional auxiliary supporting structure is not required, and the clamping efficiency is improved.
Description
Technical Field
The invention relates to the field of tool clamps, in particular to a large workpiece clamping device and a clamping system.
Background
Along with the rapid development of scientific and industrial technologies, the industrial manufacturing technology makes a revolutionary breakthrough, the corresponding processing, manufacturing, detecting, experimental and other equipment performances are more and more powerful, but the clamping process of the matched workpiece or part cannot make an adaptive progress, and the clamping requirements of the whole processing, detecting, moving, fixing and the like of the large-scale part are increasingly outstanding along with the implementation of various large-scale projects, so that the existing workpiece clamping mode is difficult to completely meet the requirements. For example, when the whole large-scale cylinder workpiece is required to be clamped, fixed, moved, hoisted, integrally rotated and the like, a plurality of common problems exist: inconvenient operation, poor flexibility, lack of safety, poor precision, high cost and low efficiency; the clamping mode at the part where the local bulge exists on the surface of the workpiece can damage the surface of the workpiece, or the conditions of uneven clamping force and relative displacement between the clamping surface and the surface of the workpiece exist; in order to solve such problems, intensive research and exploration is necessary.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a clamping device which can realize uniform clamping and is suitable for cylindrical workpieces with larger volume and weight, and a large workpiece clamping system which can be flexibly used.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the large workpiece clamping device comprises a circular clamp body, wherein an inner ring of the clamp body is provided with a mounting groove for mounting a plurality of groups of detachable clamping units; the clamp body is provided with a transmission tooth which is used for meshing transmission with an external gear on one side of the outer ring of the circular ring or also provided with a transmission tooth which is used for meshing transmission with the external gear; the clamping unit comprises a clamping executing device and a clamping driving device, wherein the clamping driving device is connected with the clamping executing device and is used for driving the clamping executing device to move in the axial direction and/or the radial direction of the circular ring of the clamp body; each clamping executing device is circumferentially distributed along the inner ring of the clamp body.
Further, the clamp body is provided with a transmission tooth on one side of the outer ring of the circular ring for meshing transmission with an external gear.
The invention also provides a large workpiece clamping system, which comprises the large workpiece clamping device and a bearing platform, wherein the bearing platform is provided with support bases in parallel; the support base is provided with a rolling bearing groove matched with the outer edge of the clamp body.
Further, a guide rail rack is arranged on the bearing platform, and correspondingly, a hand wheel and a transmission part are arranged on the supporting base; the output of the hand wheel is connected with the transmission part, and the output of the transmission part is a guide gear matched with the rack, so that the transmission part is driven by the hand wheel to move along the guide rail rack to support the base.
According to the invention, through the design of the clamping units, each clamping unit can independently drive the corresponding clamping executing device; after the constant output power or the constant output force is set, the active clamping force of each clamping driving device on the workpiece is balanced, so that larger clamping force can be realized on the whole, and local damage to the surface of the workpiece is avoided; when the cylinder structure of the non-circular workpiece or the center of the section of the workpiece is not positioned at the axial center of the clamp body, each clamping driving device drives the clamping executing device to the surface of the workpiece under the condition of constant force output and offsets with corresponding force, and even if the clamping driving device rotates from the lower part to the upper part in the rotating process, the clamping driving device can adaptively adjust the clamping, thereby realizing floating clamping and keeping the workpiece and the clamping point from relative displacement; when the number of the clamping units distributed on the whole circumference is large, the effective contact area of the workpiece during clamping can be increased, the clamping force of a single clamping point and the required space volume and weight are reduced, in addition, the clamping state of the workpiece can not be influenced by the clamping device even when the individual clamping units are disassembled, and the adaptive adjustment can be conveniently and flexibly carried out when the shape structure interfering with the clamping surface appears on the surface of the cylindrical workpiece.
Compared with the prior art, the invention has the following beneficial effects:
the floating clamping device has the advantages that floating clamping is realized, the central position of a workpiece does not need to be repeatedly adjusted when the workpiece is clamped, an additional auxiliary workpiece supporting structure or system is not needed, and the clamping efficiency is improved;
secondly, balanced clamping is realized, and the workpiece is clamped more stably;
the critical pressure of the clamping point on the surface of the clamped workpiece can be quantitatively controlled;
the interference of local bulges of the clamped area of the workpiece on the clamping system is effectively avoided;
fifthly, improving the safety coefficient in the workpiece clamping process;
the clamping device is suitable for clamping of multiple near-cylindrical workpieces with different diameters.
Drawings
Fig. 1 is a schematic structural view of a workpiece clamping device in an embodiment.
Fig. 2 is a front view of a part of a workpiece holding device in an embodiment.
Fig. 3 is a schematic structural view of a single clamping unit in the embodiment.
Fig. 4 is a side view of a single clamping unit in an embodiment.
Fig. 5 is a cross-sectional view A-A of fig. 4.
Fig. 6 is a side view of the grip driving apparatus in the embodiment.
Fig. 7 is a B-B cross-sectional view of fig. 6.
Fig. 8 is a schematic structural view of a workpiece clamping system in an embodiment.
Fig. 9 is a front view of a support base in an embodiment.
Fig. 10 is a side view of a second support base in an embodiment.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
The workpiece clamping device comprises an annular clamp body 1, as shown in fig. 1 and 2, wherein an installation groove 8 is formed in the inner ring of the clamp body 1 so as to install detachable clamping units, and the number of the clamping units which can be installed simultaneously is 30-48; the clamp body 1 is provided with a transmission tooth 4 on one side of the outer ring of the circular ring for meshing transmission with an external gear; a groove 5 is arranged in the middle of the outer arc surface of the circular ring of the clamp body 1 so as to be suitable for clamping, hoisting and limiting of an external device or guiding when the clamp body rotates; a plurality of mounting holes 6 and guide holes 7 are arranged on one side surface of the clamp body 1; the mounting holes 6 are used for mounting and fixing the clamping units; the guide hole 7 is used for clamping a driving electric circuit or oil circuit connection of the driving device; the clamping unit comprises a clamping executing device and a clamping driving device; each clamping executing device is circumferentially distributed along the inner ring of the clamp body 1.
As shown in fig. 3, 4 and 5, the clamping executing device comprises a mounting connecting layer 16, an intermediate moving layer 17 and a clamping contact layer 18 which are sequentially stacked, wherein a contact protection layer 19 for protecting the surface of a workpiece is also attached or fixed on the outer surface of the clamping contact layer 18, and the contact protection layer 19 is made of materials with hardness smaller than that of the clamping contact layer 18, such as rubber, felt, soft copper, plastic, sponge and the like; the whole of the installation connecting layer 16 and the clamping contact layer 18 are approximately in a strip-shaped structure with the end faces being convex, and the middle movement layer 17 is in a strip-shaped structure; the middle part of the mounting connection layer 16 is also provided with a through hole 13 for being connected with a screw of the clamping driving device; the clamping executing device comprises a wide clamping executing device 3 and a narrow clamping executing device 2, and the width of a clamping contact layer corresponding to the wide clamping executing device 3 is larger than that of the narrow clamping executing device; the clamping action surface of the clamping contact layer 18 is an arc surface, and each clamping executing device is circumferentially distributed, and the clamping contact layer 18 or the contact protection layer 19 of the clamping executing device forms a cylindrical side surface concentric with the circular ring of the clamp ring body; because of the replaceability of the clamping executing device and its component parts, the clamping device can adapt to workpiece clamping with different diameter sizes; in the workpiece clamping process, selecting and removing a clamping executing device at a certain position according to the protruding position of the surface of the clamped workpiece, so as to avoid interference between a protruding object and a clamping unit; a long arc surface structure 20 extending along the length direction of the installation connecting layer 16 is arranged on one side of the middle moving layer 17, and the chord length corresponding to the long arc surface structure 20 is not greater than the width of the installation connecting layer 16; the middle part of the side of the clamping contact layer 18 close to the middle movement layer 17 is provided with a bearing boss 27, and the length of the bearing boss 27 is 1/3 of the length of the clamping contact layer; the surface of the supporting boss 27 is provided with a wide cambered surface structure 26 extending along the width direction, and the chord length corresponding to the wide cambered surface structure 26 is not greater than the length of the supporting boss 27; the length of the intermediate movement layer 17 ranges between the length of the clamping contact layer 18 and the length of the bearing boss 27; a long arc surface contact structure 21 matched and matched with the long arc surface structure 20 is arranged on one side of the middle movement layer 17, which is close to the mounting connection layer 16, so as to form an arc movement pair I with the long arc surface structure 20; a wide cambered surface contact structure 28 matched and matched with the wide cambered surface structure 26 is arranged on one side of the middle movement layer 17, which is close to the clamping contact layer 18, so that an arc-shaped movement pair II is formed by the wide cambered surface structure 26, and the corresponding chord length of the wide cambered surface contact structure 28 is not smaller than the chord length of the wide cambered surface structure 26; the mounting connection layer 16, the middle movement layer 17 and the clamping contact layer 18 are connected and fixed with each other through spring screws 29, and the middle movement layer 17 and the clamping contact layer 18 are provided with connection screw holes 14 so as to be convenient for direct mounting and fixing; the arc-shaped kinematic pair I and the arc-shaped kinematic pair II are used for self-adaptive adjustment of the clamping execution device on the surface of the workpiece; the length of the middle moving layer 17 and the length of the mounting connecting layer 16 are about half of the length of the clamping contact layer 18, and the clamping contact layer 18 forms a lever-like structure by combining the arc-shaped moving pair I and the arc-shaped moving pair II, so that the clamping contact layer 18 can be prevented from tilting, can be well adhered to the surface of a workpiece, has a certain movable space relative to the middle moving layer 17, is convenient for the force conduction of the clamping contact layer 18 on the middle moving layer 17, is also convenient for the self-adaption of the clamping contact layer 18 on the surface of the workpiece, increases the clamping area, and ensures that the clamping process of the workpiece is more stable; in addition, the middle movement layer 17 and the clamping contact layer 18 also comprise dismounting holes 9 which are correspondingly communicated with the through holes 13, and the aperture of the dismounting holes 9 is not smaller than the maximum inner diameter of the through holes 13, so that the whole clamping executing device and the clamping driving device can be conveniently and rapidly dismounted, connected or replaced; the structure of the clamping executing device can be seen that due to the convenient replaceability, different types of clamping executing devices are used for forming theoretical rings with different diameters concentric with the circular ring of the clamp ring body so as to adapt to workpiece clamping with different diameter sizes; in the clamping executing device of the same type, the widths of the clamping contact layers can be selected to be different; when the workpiece is clamped, the clamping executing device at a certain position is selected and removed according to the position of the protrusion on the surface of the clamped workpiece, so that the protrusion is avoided.
The clamping driving device comprises an electric driving mechanism or a manual driving mechanism which can set the output force and/or the output stroke; the manual driving mechanism comprises one of a screw rod, a screw rod and a rack structure; in the embodiment, the air cylinder is selected as the driving mechanism, so that when the clamping driving mechanism is used, each clamping driving device can output equal driving force, and the clamping force of each clamping executing device is equal, so that balanced clamping is realized; as shown in fig. 6, a sliding block module 15 is arranged on one side of the cylinder, which is close to the clamping executing device, and the sliding direction of the sliding block module 15 forms an included angle with the direct driving direction of the clamping driving device, so that the clamping driving device is decomposed into radial driving along the axial driving of the circular ring of the clamp body and is transmitted to the clamping executing device; fig. 7 shows one implementation manner of the slider module 15, as shown in fig. 7, the slider module 15 includes a first slider 32, a horizontal chute 34 is horizontally disposed at a middle lower portion of the first slider 32, a second slider 30 is disposed on the horizontal chute 34, the second slider 30 can move horizontally along the horizontal chute 34, and a top end of the second slider 30 is lower than an upper surface of the first slider 32; the second slide block 30 is provided with an inclined slide groove 33 which forms a mechanical self-locking angle with the horizontal direction; the first sliding block 32 is also fixed with a sliding friction block 35 which is in matched contact with the inclined surface sliding groove 33; a fixed connection block 10 is fixed on an output end 12 of the air cylinder 11 and is used for being fixed on a mounting hole 6 of the clamp body; when the air cylinder acts, the fixed connecting block 10 is fixed, the air cylinder 11 drives the first sliding block 32 to move, the first sliding block 32 drives the sliding friction block 35 to slide on the inclined surface sliding groove 33 relatively, and meanwhile, the second sliding block 30 also slides on the horizontal sliding groove 34 relatively, so that the output in the horizontal direction is converted into the output in the two directions of the horizontal direction and the vertical direction; the clamping contact surfaces of the clamping executing devices are kept on the concentric circle surfaces or the tangential surfaces of the concentric circle surfaces of the circular ring of the clamp body 1 due to the circumferential installation of the clamping units; the included angle between the inclined plane chute 33 and the horizontal direction is set to be a mechanical self-locking angle, so that when a workpiece is clamped, self-locking can be realized, the use is safe and reliable, and a cylinder gas pipe line can be removed after self-locking, so that the whole rotation of the clamp body is facilitated; the slope of the slope chute 33 is 1:10, thereby realizing fine clamping control by effectively utilizing the travel of the air cylinder, and correspondingly, the included angle is an arctangent value corresponding to the inclination; a driving device connection screw hole 31 is provided at the lower end of the second slider 32 so that the screw 22 can be connected in a matched manner, thereby realizing connection of the clamping driving device and the clamping executing device.
A large workpiece clamping system, as shown in fig. 8, includes a load platform 36 for carrying and moving large workpiece clamping devices; the bearing platform 36 is provided with a rack guide rail 37, the bearing platform 36 is also provided with a first support base 38 and a second support base 39, and the first support base 38 and the second support base 39 are respectively provided with a bearing groove; the bearing groove is matched with the outer edge of the clamp body 1 of the large workpiece clamping device 40 and is used for bearing, fixing, limiting and moving the large workpiece clamping device 40; as shown in fig. 9 and 10, three groups of fixed rolling bearings 45 and six groups of floating rolling bearings 46 are arranged in the rolling bearing groove; the fixed rolling bearing 45 is fixed with the supporting base through a concentric bearing sleeve 47, and the rotation center position of the fixed rolling bearing 45 is fixed and not adjustable; the floating rolling bearing 46 is fixed with the supporting base through an eccentric bearing sleeve 48, and the rotation center position of the floating rolling bearing 46 can be adjusted through rotating the eccentric bearing sleeve 48 so as to adapt to the use of more clamp bodies with different sizes; the rolling bearing acting surfaces of the fixed rolling bearing 45 and the floating rolling bearing 46 are propped against the outer edge of the clamp body; a hand wheel 41 and a transmission part are arranged on the first support base 38 and the second support base 39, and the output of the hand wheel 41 is connected with the transmission part; the output of the transmission part is a guide gear 49 matched with the rack guide rail 37; the hand wheel 41 drives the guide gear 49, so that the support base can conveniently move along the rack guide rail 37, the support position of the clamped workpiece is adjusted, and the workpiece 42 is clamped and fixed by the two large workpiece clamping devices 40; in addition, the second support base 39 is provided with a rotation driving means; the rotary driving device comprises a rotary driving mechanism, namely an electric motor 43 and a driving gear 44 which is connected with the output end of the electric motor 43 through a shaft; the driving gear 44 is matched with transmission teeth arranged on the clamp body of the large workpiece clamping device; when the motor 43 is started, the driving gear 44 is driven to rotate and the clamp body of the meshing transmission gear is meshed with the clamp body; in the case of clamping a workpiece, the other clamp body also rotates on the first support base.
As can be seen from the description of the above structure and the related use or principle illustration, the workpiece clamping device or the workpiece clamping system realizes flexible contact, multipoint, floating, self-adaption and rigid clamping on a workpiece (particularly suitable for fire products needing to be protected), can quantify the clamping force value on the surface of the workpiece, has good stress condition of the workpiece, ensures the safety and the non-damage of the workpiece when the workpiece is reliably clamped, and is safe and reliable to use; when the device clamps a workpiece, the clamping executing device contacted with the surface of the workpiece can realize self-adaptive deflection movement under the combined action of the same clamping force and the specific structure of the clamping executing device, each clamping point can effectively contact the surface of the workpiece, and self-adapts to eccentric and local high points of the workpiece at a certain angle; the workpiece to be clamped is provided with a plurality of (more than 10) clamping contact points along the circumference to realize finite element multi-point clamping, and each clamping contact point has the same clamping force, is uniform in stress and has high safety coefficient; the workpiece is adaptively contacted by the clamp body and the clamping device thereof, so that a rigid clamping effect is achieved, and the workpiece can maintain the clamping stability during precise integral movements such as high-precision rotation, translation, deflection and the like; the workpiece bearing platform can be used for indexing the motion base, so that high-precision rotary motion after workpiece clamping can be realized, and the heartbeat momentum is small in workpiece rotation; the workpiece is automatically clamped at multiple points, the large workpiece is only required to be hoisted once, the clamping execution action can also realize one-key automatic clamping, and the operation is convenient; the center position of the workpiece is not required to be adjusted when the workpiece is clamped, and an additional auxiliary workpiece supporting structure or system is not required, so that the clamping efficiency is improved; in addition, according to the protruding characteristics of the workpiece surface, the clamping executing devices which are in contact with the workpiece surface in a specific number and a certain area are selected, protrusions on different workpiece surfaces are avoided, the range of the workpiece which can be clamped is wide, the clamping executing devices with different clamping diameters can be replaced selectively to clamp the workpieces with different diameters, and the clamping device and the clamping system are high in adaptability.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (12)
1. Large-scale work piece clamping device, its characterized in that: the clamp comprises a circular clamp body, wherein an inner ring of the clamp body is provided with a mounting groove for mounting a plurality of groups of detachable clamping units; the clamp body is provided with a transmission tooth which is used for meshing transmission with an external gear on one side of the outer ring of the circular ring or also provided with a transmission tooth which is used for meshing transmission with the external gear; the clamping unit comprises a clamping executing device and a clamping driving device, wherein the clamping driving device is connected with the clamping executing device and is used for driving the clamping executing device to move in the axial direction and/or the radial direction of the circular ring of the clamp body; each clamping executing device is circumferentially distributed along the inner ring of the clamp body;
the clamping executing device comprises an installation connecting layer, an intermediate motion layer and a clamping contact layer which are sequentially stacked; the whole installation connecting layer and the clamping contact layer are approximately in strip-shaped structures with the end faces being convex, and the middle movement layer is in a strip-shaped structure; the length of the middle moving layer and the mounting connecting layer is smaller than the length of the clamping contact layer; the mounting connecting layer, the middle moving layer and the clamping contact layer are mutually connected and fixed through screws; the middle part of the installation connecting layer is also provided with a through hole for being connected with a screw of the clamping driving device.
2. A large workpiece clamping device as recited in claim 1, wherein: the clamp body is provided with a groove along the middle part of the outer cambered surface of the ring structure so as to be suitable for clamping, hoisting and limiting of an external device or guiding when the clamp body rotates.
3. A large workpiece clamping device as recited in claim 1, wherein: mounting holes and guide holes, the number of which is the same as that of the clamping units, are formed in the circumference of one side surface of the clamp body; the mounting holes are used for mounting and fixing the clamping units; the guide holes are used for clamping driving electric circuits or oil circuit connection of the driving device.
4. A large workpiece clamping device as recited in claim 1, wherein: the clamping driving device is provided with a sliding block module at one side close to the clamping executing device, and the sliding direction of the sliding block module forms an included angle with the direct driving direction of the clamping driving device and is used for decomposing the axial driving of the clamping driving device along the circular ring of the clamp body into radial driving and transmitting the radial driving to the clamping executing device; the included angle is a mechanical self-locking angle.
5. A large workpiece clamping device as recited in claim 1, wherein: a long arc surface structure extending along the length direction of the installation connecting layer is arranged on one side of the installation connecting layer close to the middle moving layer, and the chord length corresponding to the long arc surface structure is not greater than the width of the installation connecting layer; the middle part of one side of the clamping contact layer close to the middle motion layer is provided with a bearing boss, and the length of the bearing boss is not more than 2/3 of the length of the clamping contact layer; the surface of the supporting boss is provided with a wide cambered surface structure extending along the width direction of the supporting boss, and the chord length corresponding to the wide cambered surface structure is not greater than the length of the supporting boss; the length range of the middle motion layer is between the length of the clamping contact layer and the length of the bearing boss; a long arc surface contact structure matched and matched with the long arc surface structure is arranged on one side of the middle movement layer, which is close to the installation connection layer, so that an arc movement pair I is formed by the middle movement layer and the long arc surface structure; a wide cambered surface contact structure matched and matched with the wide cambered surface structure is arranged on one side, close to the clamping contact layer, of the middle movement layer, so that an arc-shaped movement pair II is formed by the middle movement layer and the wide cambered surface structure, and the corresponding chord length of the wide cambered surface contact structure is not smaller than that of the wide cambered surface structure; the installation connecting layer, the middle moving layer and the clamping contact layer are mutually connected and fixed through spring screws; the arc-shaped kinematic pair I and the arc-shaped kinematic pair II are used for self-adaptive adjustment of the clamping execution device on the surface of the workpiece.
6. A large workpiece clamping device as recited in claim 1, wherein: the outer surface of the clamping contact layer is also attached or fixed with a contact protection layer for protecting the surface of the workpiece; the material hardness of the contact protection layer is smaller than that of the clamping contact layer.
7. A large workpiece clamping device as recited in claim 1, wherein: the middle movement layer and the clamping contact layer further comprise dismounting holes which are correspondingly communicated with the through holes, and the aperture of each dismounting hole is not smaller than the maximum inner diameter of the through hole, so that the whole clamping executing device and the clamping driving device can be conveniently and rapidly dismounted, connected or replaced.
8. A large workpiece clamping device as recited in claim 1, wherein: the clamping driving device comprises an electric driving mechanism or a manual driving mechanism which can set the output force and/or the output stroke; wherein the electric driving mechanism comprises one of an air cylinder, a hydraulic cylinder or an electric cylinder; the manual driving mechanism comprises one of a screw rod, a screw rod and a rack structure.
9. A large workpiece clamping system, characterized by: comprising at least two large workpiece clamping devices according to any of claims 1 to 8, and further comprising a carrying platform, wherein the carrying platform is provided with support bases in parallel; the support base is provided with a rolling bearing groove matched with the outer edge of the clamp body.
10. A large workpiece clamping system as recited in claim 9, wherein: the bearing platform is provided with a guide rail rack, and correspondingly, the supporting base is provided with a hand wheel and a transmission part; the output of the hand wheel is connected with the transmission part, and the output of the transmission part is a guide gear matched with the rack, so that the transmission part is driven by the hand wheel to move along the guide rail rack to support the base.
11. A large workpiece clamping system as recited in claim 9, wherein: at least two groups of fixed rolling bearings and at least one group of floating rolling bearings are arranged in the rolling bearing groove; the fixed rolling bearing is fixed with the supporting base through a concentric bearing sleeve, and the rotation center position of the fixed rolling bearing is fixed and not adjustable; the floating rolling bearing is fixed with the supporting base through an eccentric bearing sleeve, and the rotation center position of the floating rolling bearing can be adjusted through rotating the eccentric bearing sleeve; the rolling bearing acting surfaces of the fixed rolling bearing and the floating rolling bearing are propped against the outer edge of the clamp body.
12. A large workpiece clamping system as recited in claim 9, wherein: at least one supporting base is provided with a rotary driving device; the rotary driving device comprises a rotary driving mechanism and a driving gear connected with the output end of the rotary driving mechanism through a shaft; the driving gear is matched with a transmission gear arranged on the clamp body.
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| CN201710684541.4A CN107309686B (en) | 2017-08-11 | 2017-08-11 | Large workpiece clamping device and clamping system |
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| CN201710684541.4A CN107309686B (en) | 2017-08-11 | 2017-08-11 | Large workpiece clamping device and clamping system |
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| CN107309686B true CN107309686B (en) | 2023-05-30 |
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| CN108426723A (en) * | 2018-03-28 | 2018-08-21 | 天津中德应用技术大学 | A kind of drive steering shaft rotating mechanism |
| DE102018126018A1 (en) * | 2018-10-19 | 2020-04-23 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Workpiece support for supporting pipe material in a pipe processing machine and pipe processing machine |
| CN110450184A (en) * | 2019-08-28 | 2019-11-15 | 新松机器人联合研究院(湘潭)有限公司 | A kind of bolt fastening machine people system end actuator attachment device |
| CN111451969B (en) * | 2020-05-15 | 2021-02-26 | 燕山大学 | Annular centripetal clamp with shape self-adaptive capacity |
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