CN117047150A - Machine tool chuck for workpiece machining - Google Patents
Machine tool chuck for workpiece machining Download PDFInfo
- Publication number
- CN117047150A CN117047150A CN202311308749.8A CN202311308749A CN117047150A CN 117047150 A CN117047150 A CN 117047150A CN 202311308749 A CN202311308749 A CN 202311308749A CN 117047150 A CN117047150 A CN 117047150A
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- China
- Prior art keywords
- chuck
- balance
- product
- connecting rod
- clamping
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- Granted
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- 238000003754 machining Methods 0.000 title abstract description 7
- 239000012530 fluid Substances 0.000 claims description 30
- 239000000110 cooling liquid Substances 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 14
- 230000017525 heat dissipation Effects 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- 210000000078 claw Anatomy 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000008859 change Effects 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000002775 capsule Substances 0.000 description 6
- 230000006378 damage Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002173 cutting fluid Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 208000025962 Crush injury Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/103—Retention by pivotal elements, e.g. catches, pawls
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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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
Abstract
The application discloses a machine tool chuck for workpiece processing, and particularly relates to the technical field of machining, which comprises a chuck seat, wherein a plurality of groups of clamping jaws are arranged on the chuck seat, and slide along the radial direction of the chuck seat on the surface of the chuck seat; the inside of the chuck seat is provided with a balance connecting rod, the balance connecting rod is arranged inside the chuck seat in a sliding way along the radial direction of the chuck seat, both ends of the balance connecting rod are respectively provided with a reverse pushing fixing frame and a reverse pushing fixing frame, and the reverse pushing fixing frame is positioned at one side of the mass center of a product far away from the axis of the chuck seat; when the chuck seat rotates, the balance mass block is used for generating a balance centrifugal force on the balance connecting rod. According to the application, the counter-pushing fixing frame is driven by the balance mass block and the balance connecting rod to provide a balance force for the product, so that the influence caused by the mass center deviation of the product is eliminated, that is, the clamping force of the clamping jaw on the product is not changed due to high-speed rotation of the chuck seat, the inner wall of the product is not crushed, and the processing quality is improved.
Description
Technical Field
The application relates to the technical field of machining, in particular to a machine tool chuck for workpiece machining.
Background
The chuck is a mechanical device on a machine tool for clamping a workpiece. The workpiece is clamped and positioned by the radial movement of the movable claws uniformly distributed on the chuck body. For example, turning of shaft and cylinder workpieces, the workpieces need to be fixed on a chuck, and then the spindle is controlled to rotate so as to drive the workpieces to rotate for machining.
The chuck is usually formed by chuck seat and the jack catch on the chuck seat, during the use, rotate bevel gear with the spanner, bevel gear drives plane rectangle screw thread, then drives three-jaw centripetal motion, because the pitch of plane chuck plane rectangle screw thread equals, so three-jaw motion distance equals, has the effect of self-centering, can carry out centering clamp to the work piece.
In order to realize high-precision processing of a workpiece, when the workpiece is clamped, high-precision clamping is required to be maintained between the clamping jaw and the workpiece, so that the clamping jaw is required to use a rigid structure to avoid deformation to influence precision when the clamping jaw clamps the workpiece, and in order to avoid clamping damage to the workpiece by the clamping jaw during actual clamping, the clamping force of the clamping jaw is required to be reasonably controlled, so that the workpiece surface is ensured not to be damaged by clamping, and the workpiece can be stably clamped when the workpiece stably rotates.
In the production of small-lot parts such as end caps, lathe turning is usually performed on the end wall and the outer wall of a tubular structure such as a boss on the part in order to perform efficient, low-cost and high-precision machining on the tubular structure. In production practice, some irregular end cover parts also need to be finished on a lathe, the inner wall of a hole of a workpiece is clamped by using three clamping jaws of a chuck, but the mass centers of the parts are not arranged on the central line of the lathe chuck, the lathe rotates at a high speed, so that the workpiece generates centrifugal force, the centrifugal force of the workpiece can lead to the increase of the clamping force between the clamping jaw at one side far away from the mass center of the workpiece and the inner wall of the workpiece, meanwhile, the clamping force between the clamping jaw close to the mass center direction of the workpiece and the inner wall of the workpiece is reduced, the clamping jaw with the increased clamping force can generate crush injury on the inner wall of the workpiece, the inner wall of the workpiece forms an indentation, and the quality of the workpiece is influenced.
Disclosure of Invention
The application provides a machine tool chuck for workpiece processing, which aims to solve the problems that: the centrifugal force generated by the turning of the existing irregular end cover parts can cause the increase of the clamping force of part clamping jaws and the inner wall of a workpiece so as to damage the inner wall of the workpiece.
In order to achieve the above purpose, the present application provides the following technical solutions: a machine tool chuck for workpiece processing comprises a chuck seat, wherein a plurality of groups of clamping jaws are arranged on the chuck seat, and the clamping jaws slide along the radial direction of the chuck seat on the surface of the chuck seat; the inside of the chuck seat is provided with a balance connecting rod, the balance connecting rod is arranged inside the chuck seat in a sliding way along the radial direction of the chuck seat, both ends of the balance connecting rod are respectively provided with a reverse pushing fixing frame and a reverse pushing fixing frame, the reverse pushing fixing frame is positioned on one side of the mass center of a product, which is far away from the axis of the chuck seat, and the reverse pushing fixing frame is used for clamping one end of the product, which is far away from the axis direction of the chuck seat, relative to the mass center of the product; when the chuck seat rotates, the balance mass block is used for generating a balance centrifugal force for the balance connecting rod, the balance centrifugal force drives the reverse thrust fixing frame to provide a balance force for the product through the balance connecting rod, the balance force is arranged along the connecting line direction of the product mass center and the axis of the chuck seat and towards the chuck seat, and the balance force is used for balancing the centrifugal force generated by the product mass center deviation during rotation.
In a preferred embodiment, the balance mass is slidably mounted on the balance connecting rod, and a fastening structure is provided between the balance mass and the balance connecting rod, and the surface of the balance connecting rod is provided with graduation marks.
In a preferred embodiment, the balance connecting rod is provided with a pre-tightening threaded ring at one end close to the balance mass block, the balance connecting rod is provided with a threaded section, the pre-tightening threaded ring is in threaded sleeve connection with the outer part of the threaded section of the balance connecting rod, and one side of the chuck seat corresponding to the pre-tightening threaded ring is provided with a flat contact surface.
In a preferred embodiment, a buffer elastic member is disposed between the thrust-back holder and the chuck base, and the buffer elastic member is used for providing an elastic force for the thrust-back holder in a direction away from the axis of the chuck base.
In a preferred embodiment, the thrust-reversing fixing frame comprises a pressing frame, the pressing frame is fixedly arranged at the end part of the balance connecting rod, two groups of limiting clamping plates are arranged on the pressing frame and symmetrically arranged along the vertical connecting line of the mass center of the product and the axis of the chuck base, one side, close to the product, of the limiting clamping plates is provided with a positioning protrusion, and the positioning protrusion is of a semi-cylindrical structure arranged along the direction parallel to the axis of the chuck base.
In a preferred embodiment, the two sides of the pressing frame are provided with guide frames, the guide frames are provided with adjusting sliding sleeves in a sliding mode, a fastening structure is arranged between each adjusting sliding sleeve and each guide frame, one end, close to each adjusting sliding sleeve, of each limiting clamping plate is rotationally connected with each adjusting sliding sleeve, and the rotating axes of the limiting clamping plates are parallel to the axis of the chuck base.
In a preferred embodiment, the side of the claw for clamping the product is provided with a rigid clamping part, and the side of the claw corresponding to the rigid clamping part is provided with a resistance increasing structure for increasing the friction resistance between the inner wall of the product and the claw.
In a preferred embodiment, the resistance increasing structure is an expansion bag body, the position of the claw corresponding to the resistance increasing structure is provided with a mounting groove, the expansion bag body is fixedly mounted in the mounting groove, one side of the expansion bag body corresponding to the rigid clamping part exposes out of the mounting groove and is formed into a resistance surface, the resistance surface is provided with resistance lines, the expansion bag body is an elastic bag body structure, the inside of the expansion bag body is filled with high-pressure fluid, and when the expansion bag body does not contact the inner wall of a product, the resistance surface of the expansion bag body protrudes out of the rigid clamping part.
In a preferred embodiment, the end face of one end of the chuck seat corresponding to the clamping jaws is provided with fluid radiators with the same number as the clamping jaws, the fluid radiators are fixedly arranged on the chuck seat, the fluid filled in the expansion bag body is cooling liquid, the expansion bag body is connected with the fluid radiators through flexible connecting pipes, each group of expansion bag body and the fluid radiators form an annular passage through the flexible connecting pipes, particle balls are further arranged in the cooling liquid filled in the expansion bag body, and the fluid radiators are used for increasing the heat dissipation area of the cooling liquid.
In a preferred embodiment, in order to improve the heat dissipation effect of the fluid radiator, the fluid radiator is provided with a plurality of flat flow channels, a heat dissipation channel for accommodating air circulation is formed between two adjacent flat flow channels, and one end of each flat flow channel, which is close to the flexible connecting pipe, is communicated through the converging cavity.
The application has the beneficial effects that:
according to the application, the counter-pushing fixing frame is driven by the balance mass block and the balance connecting rod to provide a balance force for a product, so that the influence caused by the mass center deviation of the product is eliminated, that is, the clamping force of the clamping jaw on the product is not changed due to high-speed rotation of the chuck seat, the inner wall of the product is not crushed, the processing quality is greatly improved, and meanwhile, the centrifugal force generated during the rotation of the product is balanced, so that the equipment is more stable during the processing, and the vibration of the equipment and a workpiece is reduced.
According to the application, the friction resistance of the product is increased by expanding the bag body, so that the scratch on the inner wall caused by the relative rotational displacement of the product and the clamping jaw during acceleration or deceleration is avoided, the protection effect on the product is further improved, and the processing quality of the product is improved.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present application.
Fig. 2 is a front view of the present application.
Fig. 3 is a state diagram of the balance bar of the present application inside the chuck base.
Fig. 4 is a longitudinal cross-sectional view of the present application.
Fig. 5 is a top view of the thrust-reversing fixing frame of the present application.
Fig. 6 is a schematic view of the overall structure of the limit of the present application.
Fig. 7 is an enlarged view of the structure of the portion a of fig. 2 according to the present application.
Fig. 8 is a diagram showing a distribution of the heat dissipating cartridge of the present application on the chuck base.
Fig. 9 is an enlarged view of a part of the structure of fig. 8 according to the present application.
Fig. 10 is a schematic diagram of the overall structure of the heat dissipation case of the present application.
The reference numerals are: 1. a chuck base; 2. a claw; 21. a rigid clamping portion; 3. a balance connecting rod; 31. pre-tightening a threaded ring; 32. a buffer elastic member; 4. a fixing frame is pushed back; 41. a compacting frame; 42. limiting clamping plates; 421. positioning the bulge; 43. a guide frame; 44. adjusting the sliding sleeve; 5. a balance mass; 6. resistance increasing structure; 61. expanding the bladder; 62. a flexible connecting tube; 63. a pellet ball; 7. a fluid radiator; 71. a flat flow channel; a. and (5) a product.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings, wherein it is to be understood that the following detailed description is for the purpose of further illustrating the application only and is not to be construed as limiting the scope of the application, as various insubstantial modifications and adaptations of the application to those skilled in the art can be made in light of the foregoing disclosure.
Referring to fig. 1-10 of the specification, a machine tool chuck for workpiece processing comprises a chuck seat 1, a plurality of groups of clamping jaws 2 are arranged on the chuck seat 1, the clamping jaws 2 slide along the radial direction of the chuck seat 1 on the surface of the chuck seat 1, the control mode of the clamping jaws 2 adopts a scheme commonly used in machine tool processing, the embodiment is not repeated, each group of clamping jaws 2 are positioned in the product a during actual clamping, one side of the clamping jaw 2 away from the central shaft of the chuck seat 1 is used for clamping and fixing the inner wall of the product a, a balance connecting rod 3 is arranged in the chuck seat 1, the balance connecting rod 3 slides along the radial direction of the chuck seat 1 and is arranged in the chuck seat 1, the two ends of the balance connecting rod 3 are respectively provided with a reverse pushing fixed frame 4 and a reverse pushing fixed frame 4, the reverse pushing fixed frame 4 is positioned on one side of the mass center of the product a away from the axis of the chuck seat 1, and the reverse pushing fixed frame 4 is used for clamping one end of the product a away from the axis direction of the chuck seat 1 relative to the mass center;
when the chuck base 1 rotates, the balance mass block 5 is used for generating a balance centrifugal force on the balance connecting rod 3, the balance centrifugal force drives the reverse pushing fixing frame 4 to provide a balance force for the product a through the balance connecting rod 3, the balance force is arranged along the connecting line direction of the mass center of the product a and the axis of the chuck base 1 and faces the chuck base 1, and the balance force is used for balancing the centrifugal force generated by the mass center deviation of the product a during rotation, so that the influence caused by the mass center deviation of the product a can be eliminated when the product a is processed, that is, the clamping force of the clamping jaw 2 on the product a is not changed during high-speed rotation of the chuck base 1, therefore, as long as the initial clamping force is controlled, the clamping force is not changed during the processing, the inner wall of the product a is not damaged, the processing quality is greatly improved, meanwhile, the centrifugal force generated during the rotation of the product a is balanced, the processing is stable, the vibration of the equipment and the processing precision of the workpiece is further improved.
It should be noted that, for the equipment to process different workpieces, the balancing centrifugal force provided by the balancing mass 5 during actual use needs to be adjustable, so the present embodiment further provides the following technical solutions: the balance mass block 5 is slidably mounted on the balance connecting rod 3, a fastening structure is arranged between the balance mass block 5 and the balance connecting rod 3, specifically, the fastening structure can be a fastening screw mounted on the balance mass block 5, the balance connecting rod 3 is tightly pressed by the fastening screw to fix the position of the balance mass block 5, a fastening nut which is threadably mounted on the balance connecting rod 3 can also be selected, the position of the balance mass block 5 is fixed by rotating the position of the fastening nut adjusting nut, so that the position of the balance mass block 5 on the balance connecting rod 3 can be adjusted, the actual position of the balance mass block 5 on the balance connecting rod 3 can be adjusted according to the actual mass center offset condition of a processed product and the actual size of the product a, the balance arm of the balance mass block 5 can be changed, the balance centrifugal force actually provided by the balance mass block 5 can be adjusted, and further, in order to enable the adjustment of the balance mass block 5 to be more accurate, a scale mark can be arranged on the surface of the balance connecting rod 3, and the balance mass block 5 can be adjusted with high precision.
Further, when the chuck base 1 rotates stably, the balance mass block 5 always pulls the balance connecting rod 3 and the reverse pushing fixing frame 4 to form a balance effect on the product a, but when the chuck base 1 starts to rotate, the free sliding of the balance connecting rod 3 may cause the reverse pushing fixing frame 4 to separate from the product a, so the following technical scheme is provided in this embodiment: the balance connecting rod 3 is provided with pretension screwed ring 31 near the one end of balance mass piece 5, is provided with the screw thread section on the balance connecting rod 3, and pretension screwed ring 31 screw thread cup joints in the outside of balance connecting rod 3 screw thread section, and chuck seat 1 corresponds one side of pretension screwed ring 31 and is provided with the level and smooth contact surface.
It should be noted that, during actual installation, the product a is clamped on the claw 2, then, the reaction fixing frame 4 is adjusted to contact with the edge of the product a, then, the pre-tightening threaded ring 31 is screwed, after the pre-tightening threaded ring 31 contacts with the chuck base 1, the balance connecting rod 3 provides a pre-tightening force for driving the reaction fixing frame 4 to approach the axis direction of the chuck base 1 to the reaction fixing frame 4, and the reaction fixing frame 4 is realized to preliminarily clamp the product a, so that during starting and stopping of the chuck base 1, even if the chuck base 1 is in a variable speed state, the balance connecting rod 3 and the reaction fixing frame 4 can be kept fixed under the pre-tightening of the pre-tightening threaded ring 31 without deviation, and when the chuck base 1 rotates steadily, the reaction fixing frame 4 is driven to compress the product a under the centrifugal force of the balance mass block 5, and the pre-tightening threaded ring 31 is not pressed by the reverse supporting force of the chuck base 1.
Further, the reverse pushing fixing frame 4 comprises a pressing frame 41, the pressing frame 41 is fixedly arranged at the end part of the balance connecting rod 3, two groups of limiting clamping plates 42 are arranged on the pressing frame 41, the two groups of limiting clamping plates 42 are symmetrically arranged along the vertical connecting line of the mass center of the product a and the axis of the chuck base 1, one side, close to the product a, of the limiting clamping plates 42 is provided with a positioning protrusion 421, the positioning protrusion 421 is of a semi-cylindrical structure arranged along the direction parallel to the axis of the chuck base 1, and when the limiting clamping plates 42 clamp the product a, a plurality of supporting points can be provided and support is provided in a line contact mode, so that the end part of different shapes of the product a is adapted.
When the position of the product a corresponding to the thrust-reversing frame 4 is a straight end, the two groups of limiting clamping plates 42 can be directly and fixedly connected with the pressing frame 41, but when the position of the product a corresponding to the thrust-reversing frame 4 is a circular arc end, in order to improve the supporting adaptability of the limiting clamping plates 42, the limiting clamping plates 42 are required to be rotatably mounted on the pressing frame 41, specifically, guide frames 43 are arranged on two sides of the pressing frame 41, an adjusting sliding sleeve 44 is slidably mounted on the guide frames 43, a fastening structure (refer to the set screw) is arranged between the adjusting sliding sleeve 44 and the guide frames 43, one end of the limiting clamping plates 42 close to the adjusting sliding sleeve 44 is rotatably connected with the adjusting sliding sleeve 44, and the rotating axis of the limiting clamping plates 42 is parallel to the axis of the chuck base 1.
It should be noted that when the product a is balanced and clamped, according to different shapes of the product a, the actual position of the adjusting sliding sleeve 44 can be adjusted to change the proper clamping point of the limiting clamping plate 42, and the rotation of the limiting clamping plate 42 is utilized to provide more directions for the product a, so that not only can the product a be provided with a balance force along the connection direction of the centroid of the product a and the axis of the chuck base 1, but also a limiting reaction force along the vertical direction of the balance force can be decomposed, and further the limitation of the chuck base 1 on the balance connecting rod 3 is utilized to provide swing limitation for the product a, so that the product a is more stable.
Further, a buffer elastic member 32 is disposed between the thrust-reversing fixing frame 4 and the chuck base 1, the buffer elastic member 32 is used for providing an elastic force for the thrust-reversing fixing frame 4 in a direction away from the axis of the chuck base 1, the buffer elastic member 32 is preferably a spring, and the spring is disposed between the pressing frame 41 and the chuck base 1 and is sleeved outside the balance connecting rod 3.
In the above embodiment, since the mass distribution of the processed product a is not as uniform as that of the circular structure, during actual processing, the product a also has rotational inertia, especially when the processing is stopped at the end or the rotational speed of the chuck needs to be suddenly changed during processing, under the action of inertia force caused by the mass center deviation of the product a, the product a and the clamping jaw will generate relative rotation trend, if the rotational speed change of the chuck is too large, the rotational speed change of the product a and the rotational speed change speed of the chuck will generate difference under the action of inertia (for example, when the rotational speed change of the product a is accelerated, the rotational speed change of the product a is not up to the rotational speed change of the chuck, when the rotational speed change of the product a is decelerated, the rotational speed change of the product a and the chuck will not up to the rotational speed change of the chuck will generate trace relative rotation displacement, so that the clamping jaw with the largest clamping force will scratch the inner wall of the product a, the method and the device have the advantages that the quality of the inner wall of the product a is affected, but the clamping force of the clamping jaw 2 is limited to be not excessively large to damage the inner wall of the product a, so that the friction force between the clamping jaw 2 and the product a cannot be increased by increasing the clamping force to avoid micro rotational displacement between the product a and the clamping jaw 2, the method and the device also provide the scheme that the friction force between the clamping jaw 2 and the product a can be increased while the quality of the inner wall of the product a is not affected, specifically, referring to fig. 7-9 of the specification, one side of the clamping jaw 2 for clamping the product a is provided with a rigid clamping part 21, the rigid clamping part 21 and the clamping jaw 2 are in an integrated metal structure, when the product a is clamped, the rigid clamping parts 21 of each group of clamping jaws 2 are actually contacted with the inner wall of the product a, the clamping force is applied to the product a, one side of the clamping jaw 2 corresponding to the rigid clamping part 21 is provided with a resistance increasing structure 6, the resistance increasing structure 6 is used for increasing friction resistance between the inner wall of the product a and the clamping jaw 2, the resistance increasing structure 6 is an expansion bag body 61, a mounting groove is formed in the position, corresponding to the resistance increasing structure 6, of the clamping jaw 2, the expansion bag body 61 is fixedly mounted in the mounting groove, one side, corresponding to the rigid clamping portion 21, of the expansion bag body 61 is exposed out of the mounting groove and is formed into a resistance surface, resistance lines are formed on the resistance surface, the expansion bag body 61 is an elastic bag body, such as a rubber bag body, high-pressure fluid is filled in the expansion bag body 61, the high-pressure fluid can be high-pressure gas or high-pressure liquid, and when the expansion bag body 61 does not contact the inner wall of the product a, the resistance surface of the expansion bag body 61 protrudes out of the rigid clamping portion 21 to be arranged.
When the clamping jaw 2 is controlled to move outwards to clamp the product a gradually, the expansion bag body 61 is compressed gradually and deforms, the resistance surface of the expansion bag body is tightly attached to the inner wall of the product a, and under the pressure of internal fluid, the expansion bag body 61 also forms a reaction pressure on the inner wall of the product a, so that the friction resistance between the expansion bag body 61 and the product a is increased, therefore, when the rigid clamping part 21 is used for clamping and compacting the product a, the expansion bag body 61 provides auxiliary pressure for the product a, and the expansion bag body 61 can deform, the pressure of the expansion bag body 61 on the product a does not exceed the pressure of the rigid clamping part 21 on the product a, so that the expansion bag body 61 cannot damage the product a, but can provide effective protection for the product a.
In the above embodiment, the expansion bladder 61 is preferably a rubber structure, but the rubber structure is easily affected by high temperature, and a lot of heat is generated on the workpiece during turning, although the cutting fluid is used to cool the processing portion of the workpiece during processing, in the process of actually generating heat, part of the heat is still transferred along the workpiece itself, and some processing steps are not even used with cutting fluid for reducing the cost, in this embodiment, when the outer wall of the tubular structure of the product a is processed, even if the cutting fluid is disposed outside the tubular structure of the product a, part of the heat is transferred along the inner wall of the tubular structure, and the heat conduction effect of the expansion bladder 61 of the rubber structure is poor, so that the heat of the expansion bladder 61 is difficult to be dissipated, the temperature is gradually increased, and the service life of the expansion bladder 61 is affected.
By adding the particle balls 63 to the cooling liquid, the particle balls 63 are not fixed, the cooling liquid can be in a free state, and during actual processing, the whole chuck seat 1 rotates, so that the fluid in the annular passage is in a lagging state and cannot follow the rotation speed of the chuck seat 1, and the inertia of the particle balls 63 is added, when the chuck seat 1 rotates, the particle balls 63 also are in a lagging free state in the cooling liquid, so that the movement obstruction to the liquid is increased, but the expansion capsule 61, the fluid radiator 7 and the particle balls 63 are in a moving state, so that the cooling liquid flows relative to the expansion capsule 61 and the fluid radiator 7, the cooling liquid can quickly dissipate heat after the heat dissipation area is increased in the fluid radiator 7, and the heat of the product a transmitted to the expansion capsule 61 can be taken away in the expansion capsule 61, so that the circulation cooling of the expansion capsule 61 is realized, and the influence on the use due to the excessively high temperature of the expansion capsule 61 is avoided.
Further, in order to improve the heat dissipation effect of the fluid radiator 7, the fluid radiator 7 is provided with a plurality of flat flow channels 71, a heat dissipation channel for accommodating air circulation is formed between two adjacent flat flow channels 71, one end of each flat flow channel 71, which is close to the flexible connecting pipe 62, is communicated through the converging cavity, so that when cooling liquid relatively flows into the fluid radiator 7, the cooling liquid can be dispersed into each flat flow channel 71 to flow, the heat dissipation efficiency of the cooling liquid is improved, and it is required that one of the fluid radiators 7 is provided with an openable and closable adding pipe for adding the cooling liquid and the particle balls 63 into the annular channel, and the particle balls 63 can be metal particles or ceramic particles.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application.
Claims (10)
1. A machine tool chuck for workpiece processing, characterized in that: the chuck comprises a chuck seat (1), wherein a plurality of groups of clamping jaws (2) are arranged on the chuck seat (1), and the clamping jaws (2) slide along the radial direction of the chuck seat (1) on the surface of the chuck seat (1);
the novel chuck is characterized in that a balance connecting rod (3) is arranged in the chuck seat (1), the balance connecting rod (3) is slidably arranged in the chuck seat (1) along the radial direction of the chuck seat (1), a reverse pushing fixing frame (4) and a reverse pushing fixing frame (4) are respectively arranged at two ends of the balance connecting rod (3), the reverse pushing fixing frame (4) is positioned at one side, far away from the axis of the chuck seat (1), of the mass center of a product (a), and the reverse pushing fixing frame (4) is used for clamping one end, far away from the axis direction of the chuck seat (1), of the product (a) relative to the mass center of the product (a);
when the chuck base (1) rotates, the balance mass block (5) is used for generating a balance centrifugal force for the balance connecting rod (3), the balance centrifugal force drives the back-pushing fixing frame (4) to provide a balance force for the product (a) through the balance connecting rod (3), the balance force is arranged along the direction of connecting the centroid of the product (a) with the axis of the chuck base (1) and faces the chuck base (1), and the balance force is used for balancing the centrifugal force generated by the centroid deviation of the product (a) during rotation.
2. A machine chuck for use with workpiece processing as set forth in claim 1, wherein: the balance mass block (5) is slidably mounted on the balance connecting rod (3), a fastening structure is arranged between the balance mass block (5) and the balance connecting rod (3), and graduation marks are arranged on the surface of the balance connecting rod (3).
3. A machine chuck for use with workpiece processing as set forth in claim 2, wherein: the balance connecting rod (3) is provided with pretension screwed ring (31) near the one end of balance quality piece (5), be provided with the screw thread section on balance connecting rod (3), pretension screwed ring (31) screw thread cup joints in the outside of balance connecting rod (3) screw thread section, just chuck seat (1) corresponds one side of pretension screwed ring (31) and is provided with the level and smooth contact surface.
4. A machine chuck for use with workpiece processing as set forth in claim 3, wherein: a buffer elastic piece (32) is arranged between the reverse pushing fixed frame (4) and the chuck seat (1), and the buffer elastic piece (32) is used for providing an elastic force for the reverse pushing fixed frame (4) in the direction away from the axis of the chuck seat (1).
5. A machine tool chuck for workpiece processing as set forth in claim 4, wherein: the reverse pushing fixing frame (4) comprises a pressing frame (41), the pressing frame (41) is fixedly arranged at the end part of the balance connecting rod (3), two groups of limiting clamping plates (42) are arranged on the pressing frame (41), the two groups of limiting clamping plates (42) are symmetrically arranged along the vertical connecting line of the mass center of the product (a) and the axis of the chuck base (1), one side, close to the product (a), of the limiting clamping plates (42) is provided with a positioning protrusion (421), and the positioning protrusion (421) is of a semi-cylindrical structure arranged along the direction parallel to the axis of the chuck base (1).
6. A machine tool chuck for workpiece processing as set forth in claim 5, wherein: the clamping device is characterized in that guide frames (43) are arranged on two sides of the compression frame (41), an adjusting sliding sleeve (44) is slidably arranged on the guide frames (43), a fastening structure is arranged between the adjusting sliding sleeve (44) and the guide frames (43), one end, close to the adjusting sliding sleeve (44), of the limiting clamping plate (42) is rotationally connected with the adjusting sliding sleeve (44), and the rotation axis of the limiting clamping plate (42) is parallel to the axis of the chuck seat (1).
7. A machine chuck for use with workpiece processing as set forth in claim 6, wherein: the clamping jaw (2) is used for clamping a product (a), one side of the clamping jaw (2) is provided with a rigid clamping part (21), one side of the clamping jaw (2) corresponding to the rigid clamping part (21) is provided with a resistance increasing structure (6), and the resistance increasing structure (6) is used for increasing friction resistance between the inner wall of the product (a) and the clamping jaw (2).
8. A machine chuck for use with workpiece processing as set forth in claim 7, wherein: the expansion structure (6) is an expansion bag body (61), a mounting groove is formed in the position of the clamping jaw (2) corresponding to the expansion structure (6), the expansion bag body (61) is fixedly mounted in the mounting groove, one side of the expansion bag body (61) corresponding to the rigid clamping part (21) is exposed out of the mounting groove, a resistance surface is formed, resistance lines are formed on the resistance surface, the expansion bag body (61) is an elastic bag body structure, high-pressure fluid is filled in the expansion bag body (61), and when the expansion bag body (61) does not contact the inner wall of a product (a), the resistance surface of the expansion bag body (61) protrudes out of the rigid clamping part (21).
9. A machine chuck for use with workpiece processing as set forth in claim 8, wherein: the chuck is characterized in that fluid radiators (7) the same as the clamping claws (2) in number are arranged on one end face of the clamping claws (2) corresponding to the chuck seat (1), the fluid radiators (7) are fixedly arranged on the chuck seat (1), fluid filled in the expansion bag body (61) is cooling liquid, the expansion bag body (61) is connected with the fluid radiators (7) through flexible connecting pipes (62), each group of the expansion bag body (61) and the fluid radiators (7) form an annular passage through the flexible connecting pipes (62), and particle balls (63) are further arranged in the cooling liquid filled in the expansion bag body (61), and the fluid radiators (7) are used for increasing the cooling area of the cooling liquid.
10. A machine chuck for use with workpiece processing as set forth in claim 9, wherein: in order to improve the heat dissipation effect of the fluid radiator (7), a plurality of flat flow channels (71) are arranged on the fluid radiator (7), heat dissipation channels for accommodating air circulation are formed between two adjacent flat flow channels (71), and one end, close to the flexible connecting pipe (62), of each flat flow channel (71) is communicated through a converging cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311308749.8A CN117047150B (en) | 2023-10-11 | 2023-10-11 | Machine tool chuck for workpiece machining |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311308749.8A CN117047150B (en) | 2023-10-11 | 2023-10-11 | Machine tool chuck for workpiece machining |
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| CN117047150A true CN117047150A (en) | 2023-11-14 |
| CN117047150B CN117047150B (en) | 2024-02-02 |
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| CN202311308749.8A Active CN117047150B (en) | 2023-10-11 | 2023-10-11 | Machine tool chuck for workpiece machining |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118455568A (en) * | 2024-07-10 | 2024-08-09 | 江苏艾维基业智能科技有限公司 | Hydraulic power chuck with clamping force multi-stage adjustment function |
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|---|---|
| CN117047150B (en) | 2024-02-02 |
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