CN211277541U

CN211277541U - Machining clamp for double-head workpiece

Info

Publication number: CN211277541U
Application number: CN201922279437.4U
Authority: CN
Inventors: 吴小宝; 雷雨; 梁达胡; 周志宏
Original assignee: UV TECH MATERIAL Ltd
Current assignee: UV TECH MATERIAL Ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-08-18
Anticipated expiration: 2029-12-17

Abstract

The utility model relates to the technical field of mechanical tool, a machining fixture of double-end work piece is disclosed. The machining clamp for the double-headed workpiece comprises a pull rod which is arranged in a main shaft linkage pipe of a machine tool in a penetrating mode, one end of the pull rod is provided with a cable nozzle for clamping the workpiece, the other end of the pull rod is provided with a thread fastening assembly in a threaded mode, and the thread fastening assembly and the end portion of the main shaft linkage pipe are assembled in a blocking mode to axially stretch the pull rod; the processing clamp for the double-head workpiece further comprises a clamping sleeve fixed on the chuck, the clamping sleeve is sleeved on the pull rod, and the cable nozzle is matched with the clamping sleeve in a blocking mode in the direction towards the thread fastening assembly. The fixing between the rope mouth and the clamping sleeve is realized by stretching the rope mouth through the pull rod, the workpiece is fixed through the rope mouth, the workpiece is prevented from moving, the processing and positioning accuracy of the chuck is ensured, the rope mouth fully surrounds the outer wall of the workpiece, the action area of the clamping sleeve and the rope mouth is increased by utilizing the clamping sleeve, the workpiece is prevented from being directly clamped by the chuck, claw marks are prevented from appearing on the surface of the workpiece, and the processing quality of the workpiece is improved.

Description

Machining clamp for double-head workpiece

Technical Field

The utility model relates to a mechanical tool technical field especially relates to a machining fixture of double-end work piece.

Background

The machine tool machining is a common production operation mode in modern mechanical operation, a chuck is arranged on a machine tool, a workpiece is positioned and fixed by the chuck, the relative motion relationship between a cutter and the chuck is ensured by the machine tool, and the workpiece arranged on a clamp is machined by the cutter (or other tools). The machining quality of the workpiece can be improved by adopting mechanical machining, and meanwhile, the production efficiency of the workpiece is improved.

The existing horizontal numerical control machine tool usually adopts a hydraulic three-jaw chuck as a fixture, the hydraulic three-jaw chuck is fixed on a main shaft linkage pipe of the machine tool, and a center hole of the chuck corresponds to a through hole of the main shaft linkage pipe of the machine tool. When the workpiece to be machined is placed in the middle of the three-jaw chuck during machining, the hydraulic rear chuck is started to automatically clamp the workpiece, and the clamping degree of the chuck can be controlled by adjusting the hydraulic pressure.

The existing three-jaw chuck is only suitable for processing rough blanks during processing, and the two axial ends of the rough blanks need to be processed respectively when the existing double-head workpiece is processed by the three-jaw chuck. If hot spraying electrode tip is adding man-hour, the one end of electrode tip is inlayed with the tungsten cerium alloy, the other end is the installation screw thread, need carry out lathe work respectively to the both ends of electrode tip this moment, process out semi-manufactured goods after turning to one end earlier, process the other end in the chuck with the semi-manufactured goods clamping again, the one end that has already processed in the semi-manufactured goods this moment needs to be fixed in three-jaw chuck clamping, because hot spraying electrode tip is more short and small, the jack catch of chuck is less with semi-manufactured goods's area of contact, the inaccurate phenomenon of location can appear in the work piece, if turn down hydraulic pressure, the product is slipped easily and is come off, lead to the product to scrap, if increase hydraulic pressure, the electrode tip surface after the processing produces the.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the utility model provides a machining clamp of double-end work piece to solve the chuck among the prior art and when adding man-hour to double-end work piece, the work piece location is inaccurate, the problem of claw seal can appear on the work piece surface.

In order to achieve the above object, the present invention provides a machining fixture for a double-headed workpiece, including a pull rod for penetrating into a main shaft linkage pipe of a machine tool, one end of the pull rod is equipped with a cable nozzle for clamping the workpiece, the other end of the pull rod is equipped with a thread fastening component in a threaded manner, and the thread fastening component is assembled with an end stop of the main shaft linkage pipe to axially stretch the pull rod; the machining clamp for the double-head workpiece further comprises a clamping sleeve fixed on the chuck, the clamping sleeve is sleeved on the pull rod, and the rope nozzle is matched with the clamping sleeve in a blocking mode in the direction towards the thread fastening assembly.

Preferably, the inner wall surface of the jacket is a flared conical surface, and a stop inclined surface in stop fit with the conical surface is arranged on the rope nozzle.

Preferably, the jacket is of a stepped structure with the outer diameter decreasing along the direction from the rope mouth to the thread fastening assembly, and the small-diameter section of the jacket is used for clamping in the chuck.

Preferably, a locking screw for radially locking the rope nozzle is further arranged on the small-diameter section of the jacket.

Preferably, the screw fastening assembly includes a nut and a pressing member assembled between the nut and the spindle linkage tube, and the pressing member has a first stopping surface stopped by the nut and a second stopping surface stopped by the spindle linkage tube.

Preferably, the jacking member includes a jacking pipe and an end cover, the end cover is used for being arranged between the jacking pipe and the spindle linkage pipe, an end face of the jacking pipe, which is away from the end cover, forms the first stop surface, and an end face of the end cover, which is away from the jacking pipe, forms the second stop surface.

Preferably, a fixing piece is further arranged on the pull rod, and the fixing piece is provided with a contact surface used for being in radial contact with the pipe wall of the spindle linkage pipe.

Preferably, the fixing piece is a fixing sleeve movably sleeved on the pull rod.

The embodiment of the utility model provides a machining clamp of double-end work piece compares with prior art, and its beneficial effect lies in: this adds clamping apparatus utilizes to press from both sides the cover and fixes on the anchor clamps of lathe, realizes suo zui and pressing from both sides fixed between the cover through the pull rod stretching suzui, fixes the work piece through suzui, avoids the work piece to remove, guarantees that chuck processing location is accurate, suzui surrounds the outer wall of work piece entirely, utilizes the area of action that presss from both sides cover and suzui increase chuck simultaneously, avoids the direct clamping work piece of chuck to prevent the surface of work piece to appear the claw seal, improve the processingquality of work piece.

Drawings

Fig. 1 is a schematic structural view of a double-headed workpiece machining jig of the present invention;

fig. 2 is an assembly view of the machining jig for the double-headed workpiece of fig. 1.

In the figure, 1, a pull rod; 2. a rope nozzle; 21. a stop slope; 3. a jacket; 31. a conical surface; 32. a small diameter section; 33. locking the screw; 4. a nut; 5. pressing the pipe; 6. an end cap; 7. fixing a sleeve; 8. a main shaft linkage pipe; 9. a chuck.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The utility model discloses a double-end work piece's adds clamping apparatus's preferred embodiment, as shown in fig. 1 and fig. 2, this double-end work piece's adds clamping apparatus includes pull rod 1, cable mouth 2, screw fastening subassembly and clamp cover 3, pull rod 1 is used for wearing the dress in the main shaft linkage pipe 8 of lathe, compensate the main shaft linkage pipe 8's of lathe axial dimensions, it is fixed to realize the installation of this double-end work piece's adds clamping apparatus, it is used for fixing in chuck 9 to press from both sides cover 3, chuck 9's jack catch centre gripping is on pressing from both sides cover 3, it is used for increasing this adds clamping apparatus and chuck 9's area of contact to press from both sides cover 3, avoid chuck 9 direct clamping work piece, prevent that the surface.

The thread fastening components and the rope mouths 2 are respectively arranged at two ends of the pull rod 1, and the thread fastening components are used for axially stretching and fixing the pull rod 1. The rope nozzle 2 is used for clamping a double-end workpiece to be processed and positioning the workpiece, a center hole used for installing the workpiece to be processed is formed in the rope nozzle 2, a threaded hole is formed in the tail end of the rope nozzle 2, the rope nozzle 2 and the pull rod 1 are connected in a detachable mode through threads, and the rope nozzle 2 is convenient to disassemble and assemble through the detachable connection. The rope nozzle 2 is the prior art, the specific structure of the rope nozzle 2 is not described in detail, and different workpieces can be processed by replacing different rope nozzles 2.

The jacket 3 is sleeved on the pull rod 1, when the pull rod 1 moves, the jacket 3 is used for axially blocking the cable nozzle 2, the blocking direction is along the direction facing the thread fastening assembly, when the pull rod 1 pulls the cable nozzle 2, the jacket 3 and the cable nozzle 2 are blocked, and the cable nozzle 2 is positioned and fixed. The inner wall surface of the jacket 3 is a flared conical surface 31, the conical surface 31 is formed at one end of the jacket 3 close to the rope nozzle 2, the outer wall of the rope nozzle 2 is provided with a stop inclined surface 21 matched with the conical surface 31 of the jacket 3, the taper of the stop inclined surface 21 is the same as that of the conical surface 31, and the jacket 3 and the rope nozzle 2 are unidirectionally stopped through the conical surface 31 and the stop inclined surface 21.

The outer diameter of the jacket 3 is of a stepped structure, the outer diameter of the jacket 3 is gradually reduced along the direction from the rope nozzle 2 to the thread fastening assembly, the small-diameter section 32 of the jacket 3 is used for being clamped in the chuck 9 and is tightly matched with the inner hole of the chuck 9, the large-diameter section of the jacket 3 is in contact with the end face of the chuck 9, the jacket 3 can be positioned, and meanwhile, the jacket can also be stopped with the chuck 9, so that the jacket 3 is prevented from moving. The small diameter section 32 of the jacket 3 is also provided with a locking screw 33, the locking screw 33 is assembled on the jacket 3 along the radial thread of the jacket 3, and the locking screw 33 is used for radially locking the rope nozzle 2 to prevent the rope nozzle 2 from moving when being initially installed in the jacket 3.

The threaded fastening assembly comprises a nut 4, a jacking pipe 5 and an end cover 6, external threads are arranged at the end part of the pull rod 1, and the nut 4 is assembled on the external threads. The end cover 6 and the jacking pipe 5 are sleeved on the pull rod 1, the end cover 6 is used for being attached to the end portion of the main shaft linkage pipe 8, the jacking pipe 5 is arranged between the nut 4 and the end cover 6, and the jacking pipe 5 is used for jacking the nut 4 and the end cover 6. The jacking pipe 5 and the end cover 6 are jacked between the nut 4 and the main shaft linkage pipe 8, the jacking pipe 5 and the end cover 6 form a jacking part assembled between the nut 4 and the main shaft linkage pipe 8, the end face, deviating from the end cover 6, of the jacking pipe 5 forms a first stop face of the jacking part, the first stop face is stopped by the nut 4, and the end face, deviating from the jacking pipe 5, of the end cover 6 forms a second stop face of the jacking part, the second stop face is stopped by the main shaft linkage pipe 8.

When the nut 4 rotates on the pull rod 1 and is screwed, the jacking pipe 5 and the end cover 6 are pressed on the main shaft linkage pipe 8 due to jacking, the nut 4 cannot move axially, the main shaft linkage pipe moves, and the pull rod 1 moves towards the direction of the thread fastening assembly along the axial direction of the pull rod. When the pull rod 1 moves, the rope nozzle 2 is driven to move axially, the rope nozzle 2 enters the jacket 3 and is blocked by the blocking inclined surface 21 and the conical surface 31 of the jacket 3, the moving distance of the rope nozzle 2 is controlled, the radial acting force of the jacket 3 on the rope nozzle 2 can be adjusted, and therefore the tightness of clamping and tapping of the rope nozzle 2 is adjusted.

Still movable sleeve is equipped with fixed cover 7 on pull rod 1, and fixed cover 7 arranges between screw thread fastening component and cable mouth 2, and the external diameter of fixed cover 7 is not more than the internal diameter of main shaft linkage pipe 8, and fixed cover 7 forms the mounting on pull rod 1, and the outer wall of fixed cover 7 forms the contact surface that can contact with the internal face of main shaft linkage pipe 8, and fixed cover 7 can move about on pull rod 1, the pull rod 1 assembly of being convenient for. When the pull rod 1 is arranged on the main shaft linkage pipe 8 in a penetrating manner, the fixing sleeve 7 radially supports the pull rod 1, so that the pull rod 1 is prevented from warping, and the coaxiality of the pull rod 1 is ensured; meanwhile, when a workpiece is machined, the chuck 9 drives the jacket 3, the rope nozzle 2, the pull rod 1 and the workpiece to rotate, and the coaxiality of the throw pillow pull rod 1 can improve the machining precision of the workpiece. In other embodiments, an outer ring platform may be integrally formed on the pull rod 1, and the outer ring platform forms a fixing member on the pull rod 1.

The utility model discloses a working process does: when a double-end workpiece needs to be turned around, a pull rod 1 is arranged in a main shaft linkage pipe 8 and a chuck 9 of a horizontal numerical control lathe in a penetrating mode, a fixing sleeve 7 on the pull rod 1 is radially supported in the main shaft linkage pipe 8, a clamping sleeve 3 is fixed on a three-jaw chuck 9, and a small-diameter section 32 of the clamping sleeve 3 is tightly matched with an inner hole of the chuck 9; screwing the rope nozzle 2 on the end part of the pull rod 1, and locking the rope nozzle 2 through a locking screw 33 to prevent the rope nozzle 2 from loosening in the processing; respectively sleeving an end cover 6 and a top pressure pipe 5 on a pull rod 1, attaching the end cover 6 to the end part of a main shaft linkage pipe 8, installing a semi-finished double-head workpiece in a cable nozzle 2, screwing a nut 4, and adjusting the tightness degree of the cable nozzle 2 for clamping the double-head workpiece through the screwing-in amount of the nut 4; and hydraulic pressure is started, a main shaft linkage pipe 8 of the lathe moves towards one end of the threaded fastening assembly, three claws of a chuck 9 are pulled to move towards the center, the chuck 9 clamps the jacket 3, meanwhile, the pull rod 1 moves along with the main shaft linkage pipe 8, the rope nozzle 2 automatically clamps the double-end workpiece, and then the double-end workpiece can be processed.

To sum up, the embodiment of the utility model provides a double-end work piece adds clamping apparatus, it utilizes to press from both sides the cover to fix on anchor clamps, realizes through pull rod stretching rope mouth that rope mouth and clamp fixed between the cover, fixes the work piece through rope mouth, avoids the work piece to remove, guarantees that chuck processing location is accurate, and rope mouth surrounds completely to the outer wall of work piece, utilizes the effective area who presss from both sides cover and rope mouth increase chuck simultaneously, avoids the direct clamping work piece of chuck to prevent that the claw seal from appearing in the surface of work piece, improve the processingquality of work piece.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. The machining clamp for the double-headed workpiece is characterized by comprising a pull rod which is arranged in a main shaft linkage pipe of a machine tool in a penetrating mode, wherein one end of the pull rod is provided with a cable nozzle for clamping the workpiece, the other end of the pull rod is provided with a thread fastening assembly in a threaded mode, and the thread fastening assembly is assembled with the end part of the main shaft linkage pipe in a blocking mode to axially stretch the pull rod; the machining clamp for the double-head workpiece further comprises a clamping sleeve fixed on the chuck, the clamping sleeve is sleeved on the pull rod, and the rope nozzle is matched with the clamping sleeve in a blocking mode in the direction towards the thread fastening assembly.

2. The double-ended workpiece machining jig according to claim 1, wherein the inner wall surface of the jacket is a flared conical surface, and a stopper inclined surface that is in stopper fit with the conical surface is arranged on the rope mouth.

3. The double-ended workpiece machining fixture according to claim 1, wherein the collet is of a stepped structure with a decreasing outer diameter in the direction from the socket to the threaded fastening assembly, and a small diameter section of the collet is used for clamping in the chuck.

4. The double-ended workpiece machining fixture according to claim 3, wherein a locking screw for radially locking the cable nozzle is further arranged on the small diameter section of the jacket.

5. The double-ended workpiece machining fixture according to any one of claims 1 to 4, wherein the threaded fastening assembly comprises a nut, and a pressing member assembled between the nut and the spindle linkage tube, the pressing member having a first stop surface for stopping the nut and a second stop surface for stopping the spindle linkage tube.

6. The double-ended workpiece machining fixture according to claim 5, wherein the pressing member comprises a pressing pipe and an end cap, the end cap is arranged between the pressing pipe and the spindle linkage pipe, an end face of the pressing pipe, which faces away from the end cap, forms the first stop surface, and an end face of the end cap, which faces away from the pressing pipe, forms the second stop surface.

7. The double-ended workpiece machining fixture according to any one of claims 1 to 4, wherein a fixing member is further arranged on the pull rod, and the fixing member has a contact surface for radially contacting with a pipe wall of the spindle linkage pipe.

8. The double-ended workpiece machining fixture of claim 7, wherein the fixing member is a fixing sleeve movably fitted over the pull rod.