Lathe machining part clamp

Abstract

The utility model discloses a lathe processing part clamp, which relates to the technical field of lathe processing, and comprises a butt-joint disc, the butt-joint disc is detachably connected with a lathe three-jaw chuck, the clamp comprises a plurality of clamping seats which are oppositely clamped on the outer side of a special-shaped part, and the space among the concave parts of the plurality of clamping seats is a clamping space for clamping the special-shaped part. The door-shaped frames can be transversely adjusted in a reciprocating mode relative to the clamping base, the ends of the door-shaped frames extend into the clamping space, buffering clamping pieces are fixed to the inner side walls of the ends of the door-shaped frames, and the buffering clamping pieces are provided with attaching parts which are arranged in a bent mode towards the center position of the clamping space; and the fitting parts of the plurality of buffer clamping pieces carry out linear contact clamping on the circumferential outer wall of the special-shaped part. The fitting parts of the buffer clamping pieces are clamped on the circumferential outer wall of the special-shaped part for linear contact clamping, multi-point clamping is adopted, the contact face is small, clamping is firm, the special-shaped part cannot sideslip, and the special-shaped part can be stably fixed for turning operation.

Description

Technical Field

[0001] The utility model relates to the technical field of lathe processing, in particular to a lathe processing parts clamp. Background Art

[0002] Lathe fixtures are important tools used on lathes to process the inner and outer rotating surfaces and end faces of workpieces. Through the fixture, the workpiece can be tightly fixed to prevent displacement or tilting during the processing. Existing fixtures have three-jaw fixtures, which are distributed circumferentially around the parts and move radially synchronously to clamp the parts. However, for special-shaped structural parts, during the radial movement of the three-jaw fixture, after the fixture first contacts the irregular position of the part structure, the three jaws cannot continue to feed and clamp synchronously, resulting in empty clamps between some claws and parts. Special-shaped parts are prone to loosening during processing, which leads to large deviations in the turning accuracy of the parts, resulting in an increase in the scrap rate of special-shaped parts. In addition, if a clamping fixture is set separately for each special-shaped structural part, a set of fixtures needs to be replaced for each special-shaped structural part, which delays the turning progress and causes a corresponding increase in turning costs, making it impossible to maximize economic benefits. Utility Model Content

[0003] The purpose of the utility model is to provide a lathe processing parts fixture to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a fixture for machining parts on a lathe, comprising a docking plate, wherein the docking plate is detachably connected to a three-jaw chuck of the lathe;

[0005] The clamp includes a plurality of clamping seats relatively clamped on the outside of the special-shaped parts, a recessed portion is provided on the side wall of the clamping seat facing the special-shaped parts, the space between the recessed portions of the plurality of clamping seats is a clamping space for clamping the special-shaped parts, and also includes a plurality of portal frames that can be adjusted laterally back and forth relative to the clamping seats, the end of the portal frame extends into the clamping space, and a buffer clip is fixed to the inner side wall of the end of the portal frame, the buffer clip is provided with a fitting portion bent toward the center of the clamping space, and the fitting portions of the plurality of buffer clips perform line contact clamping on the circumferential outer wall of the special-shaped parts.

[0006] In a further embodiment, a side wall on one axial side of the docking plate is provided with a clamping shaft capable of being clamped between the three-jaw chuck of a lathe;

[0007] The side wall on one axial side of the docking disk is also provided with a plurality of clamping seats, which are circumferentially distributed around the clamping shaft, and the clamping seats are provided with clamping interfaces that are engaged with the outer walls of the clamping claw ends of the three-jaw chuck.

[0008] In a further embodiment, the docking disk is radially provided with a threaded groove, and an adjusting rod is threadedly connected in the threaded groove, the end of the adjusting rod is rotatably connected to the side wall in the threaded groove away from the groove, and the other axial side wall of the docking disk is provided with a plurality of sliding adjustment openings connected to the threaded groove, and a lifting block is extended from the end of the clamp seat, and the lifting block extends the sliding adjustment opening into the threaded groove and is provided with a threaded hole threadedly connected to the adjusting rod.

[0009] In a further embodiment, the side wall of the clamp seat is provided with sliding adjustment holes which are distributed parallel to each other, the sliding adjustment holes are connected to the recessed portion, sliding steps are provided on both sides of the recessed portion, and the side wall of the door frame end is provided with a sliding block which is slidably engaged with the sliding step.

[0010] In a further embodiment, the end of the buffer clip is slidably fitted with the inner wall of the recessed portion. When the fitting portion of the buffer clip is subjected to reverse extrusion force from the special-shaped component, the end of the buffer clip extends along the inner wall of the recessed portion, the bending arc of the fitting portion becomes larger, and rebound potential energy is generated.

[0011] In a further embodiment, a side wall of the end of the buffer clip away from the clamping space is provided with a limiting piece with a triangular cross-section, and an inner wall of the recessed portion is provided with a tooth groove that is slidably engaged with the limiting piece.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model is a lathe processing parts clamp, which adopts a plurality of buffer clips that can be relatively fed, and the clamping position of each buffer clip is adjusted laterally and reciprocally according to the outer structure of the special-shaped structural part, that is, the buffer clip is adjusted to a relatively flat and regular position of the outer structure of the special-shaped structural part, and a plurality of clamp seats are relatively fed and brought together, so that the fitting parts of the plurality of buffer clips can be clamped on the circumferential outer wall of the special-shaped part for line contact clamping finally, and multi-point clamping is adopted, the contact surface is small, the clamping is firm, the special-shaped part will not slide sideways, and the special-shaped part can be stably fixed for turning operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0015] Figure 2 An exploded view of the assembly structure of an embodiment of the utility model;

[0016] Figure 3 This is a cross-sectional view of the local structure of the docking plate and the clamping seat of an embodiment of the utility model;

[0017] Figure 4 An exploded view of the buffer structure of an embodiment of the utility model;

[0018] Figure 5 This is a schematic diagram of the docking plate structure of an embodiment of the utility model.

[0019] In the figure: 1. docking plate; 2. adjusting rod; 3. clamping seat; 31. sliding adjustment hole; 4. door frame; 41. buffer clip; 42. slider; 43. limit plate; 5. clamping shaft; 6. clamping seat. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment, this embodiment provides a lathe processing parts fixture, including a docking plate 1, the docking plate 1 and the lathe three-jaw chuck are detachably connected. Specifically, the side wall of the docking plate 1 on one axial side is provided with a clamping shaft 5 that can be clamped between the lathe three-jaw chuck, such as Figure 5 As shown, the three clamping jaws on the lathe chuck are separated synchronously to expand the clamping space, and then the clamping shaft 5 is horizontally placed between the three jaws, and then the three clamping jaws are synchronously fed to fix the clamping shaft 5 on the chuck. In order to enhance the stability of the synchronous rotation of the clamping shaft 5 and the lathe chuck and prevent relative sliding from causing transmission failure, a plurality of clamping seats 6 are also provided on the side wall of the axial side of the docking disk 1. The plurality of clamping seats 6 are circumferentially distributed around the clamping shaft 5, and the clamping seats 6 are provided with a clamping interface that is engaged with the outer wall of the end of the clamping jaw of the three-jaw chuck. Here, three clamping seats 6 are preferably used. When the clamping shaft 5 is placed between the three clamping jaws, the plurality of clamping seats 6 are aligned with each clamping jaw in turn, so that the clamping interface of the clamping seat 6 can be clamped on the outer wall of the clamping jaw. When the clamping shaft 5 is clamped between the three clamping jaws, the relative limit between the clamping seat 6 and the side wall of the clamping jaw is used to ensure that the chuck drives the clamping shaft 5 to rotate synchronously, realize 1:1 power transmission, and avoid the phenomenon that the chuck rotates and the clamping shaft 5 slips.

[0022] The clamp includes a plurality of clamping seats 3 relatively clamped on the outside of the special-shaped parts. Specifically, a threaded groove is radially opened in the docking plate 1, and an adjusting rod 2 is threadedly connected in the threaded groove. The end of the adjusting rod 2 is rotatably connected to the side wall away from the groove in the threaded groove. A plurality of sliding adjustment openings connected to the threaded groove are opened on the other axial side wall of the docking plate 1. A lifting block is extended from the end of the clamping seat 3. The lifting block extends the sliding adjustment opening into the threaded groove and is provided with a threaded hole threadedly connected to the adjusting rod 2. Figure 1 , Figure 2 and 3As shown, two clamping seats 3 are preferably used here, and the threaded holes of the lifting blocks of the two clamping seats 3 have opposite threaded directions. When the adjusting rod 2 is rotated, the two lifting blocks can be adjusted to be relatively far away or relatively close, thereby adjusting the size of the clamping gap between the two clamping seats 3.

[0023] At the same time, since the appearance and structure of the parts are different, in order to provide clamping adaptability, a recessed portion is provided on the side wall of the clamp seat 3 facing the special-shaped parts, and the space between the recessed portions of the multiple clamp seats 3 is a clamping space for clamping the special-shaped parts. It also includes multiple door frames 4 that can be reciprocated laterally relative to the clamp seat 3. The side walls of the clamp seat 3 are provided with sliding adjustment holes 31 distributed parallel to each other. The sliding adjustment holes 31 are connected to the recessed portion. The door frame 4 is slidably clamped in the sliding adjustment hole 31, and the end of the door frame 4 extends into the clamping space. The inner side wall of the end of the door frame 4 is fixed with a buffer clip 41. Figure 2 As shown, the portal frame 4 can slide horizontally along the sliding adjustment hole 31. Here, at least two portal frames 4 are arranged on the clamp seat 3, which means that at least four buffer clips 41 are arranged on one clamp seat 3, which can be used as four points on the same limiting surface of the special-shaped parts to limit and clamp the parts. The multi-point limiting clamping can ensure that the parts will not slide sideways in the lateral direction, causing the special-shaped parts to be misaligned left and right in the clamping space, affecting the turning stability of the parts.

[0024] The method of clamping the special-shaped parts is as follows: by providing a fitting portion bent toward the center of the clamping space on the buffer clip 41, the fitting portions of the multiple buffer clips 41 are clamped in line contact on the circumferential outer wall of the special-shaped parts. First, the clamping position of each buffer clip 41 is adjusted back and forth laterally according to the outer structure of the special-shaped structural part, that is, the buffer clip 41 is adjusted to a relatively flat and regular position of the outer structure of the special-shaped structural part. Then, the parts are placed between the two clamp seats 3, and the two clamp seats 3 are relatively adjusted by rotating the adjustment rod 2, so that the multiple buffer clips 41 can be relatively fed to clamp the parts. Finally, the fitting portions of the multiple buffer clips can be clamped in line contact on the circumferential outer wall of the special-shaped parts, and the clamping position of the fitting portions of the buffer clips 41 is adjusted according to the relatively flat part of the outer wall of the special-shaped parts. On the one hand, multi-point clamping is adopted, and the special-shaped parts will not slip sideways, and the clamping is firm, so that the special-shaped parts can be stably fixed for turning operations. On the other hand, the buffer clip 41 adopts a curved fitting portion that contacts the outer wall of the component, and the contact surface is small, which avoids the situation where multiple fitting portions cannot fully contact the outer wall of the component due to the protruding shape structure of the component itself, resulting in clamping gaps.

[0025] Special-shaped parts can be tightly fixed by multiple fitting parts distributed around the circumference of the parts to prevent displacement or tilting during processing. At the same time, the cutting force and tangential force applied by the turning tool can be transmitted to the workpiece so that it can withstand these forces, replacing the chuck to fix the processed special-shaped parts and transmit the processing cutting force to ensure the accuracy and quality of turning.

[0026] Furthermore, the end of the buffer clip 41 is slidably fitted with the inner wall of the recessed portion. The buffer clip 41 is made of elastic arc-shaped stainless steel. When the fitting portion of the buffer clip 41 is subjected to reverse extrusion force from the special-shaped parts, the end of the buffer clip 41 extends along the inner wall of the recessed portion, and the curvature of the fitting portion becomes larger, generating rebound potential energy, which can further enhance the stability of the clamped parts. The end of the buffer clip 41 extends along the inner wall of the recessed portion. The inner wall of the recessed portion serves as a support surface for the end of the buffer clip 41, which enhances the support strength of the slideway clip 41 itself in supporting the parts, and at the same time avoids affecting the inner wall of the recessed portion directly against the parts, resulting in a clamping gap between the inner wall of the recessed portion and the outer wall of the parts, resulting in unstable clamping of the parts.

[0027] Further, such as Figure 4 As shown, a limiting plate 43 with a triangular cross-section is provided on the side wall of the end of the buffer clip 41 away from the clamping space, and a tooth groove slidably engaged with the limiting plate 43 is provided on the inner wall of the recessed portion. When the fitting portion of the buffer clip 41 is subjected to the reverse extrusion force from the special-shaped component, the end of the buffer clip 41 extends along the inner wall of the recessed portion, and the fitting portion is extended and deformed from a curved state to a straight state, and finally the limiting plate 43 will be stuck in the tooth groove at the corresponding position in the recessed portion, so as to prevent the portal frame 4 from shaking horizontally in the sliding adjustment hole 31, thereby preventing the components clamped by multiple fitting portions from sliding horizontally with the portal frame 4, and further enhancing the clamping stability of the components.

[0028] In this embodiment, sliding steps are provided on both sides of the recessed portion, and a slider 42 is provided on the side wall at the end of the door frame 4 to slide and engage with the sliding step. When the door frame 4 slides horizontally, the slider 42 slides synchronously with the door frame 4, and the side wall of the slider 42 is pressed against the side wall of the sliding step to prevent the door frame 4 from detaching from the sliding adjustment hole 31.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lathe processing parts fixture, characterized in that: It comprises a docking plate (1), wherein the docking plate (1) is detachably connected to a three-jaw chuck of a lathe; The clamp comprises a plurality of clamping seats (3) relatively clamped on the outside of the special-shaped component, a recessed portion is provided on the side wall of the clamping seat (3) facing the special-shaped component, and the space between the recessed portions of the plurality of clamping seats (3) is a clamping space for clamping the special-shaped component. The clamp also comprises a plurality of door frames (4) capable of being reciprocated laterally relative to the clamping seat (3), the end of the door frame (4) extending into the clamping space, and a buffer clip (41) is fixed to the inner side wall of the end of the door frame (4), the buffer clip (41) is provided with a fitting portion bent toward the center of the clamping space, and the fitting portions of the plurality of buffer clips (41) are line-contact clamped on the circumferential outer wall of the special-shaped component.

2. The lathe processing parts fixture according to claim 1 is characterized in that: A clamping shaft (5) capable of being clamped between three-jaw chucks of a lathe is provided on a side wall on one axial side of the docking plate (1); A plurality of clamping seats (6) are also provided on the axial side wall of the docking plate (1). The plurality of clamping seats (6) are circumferentially distributed around the clamping shaft (5). The clamping seats (6) are provided with clamping interfaces that are engaged with the outer walls of the clamping jaw ends of the three-jaw chuck.

3. The lathe processing parts fixture according to claim 2, characterized in that: The docking plate (1) is radially provided with a threaded groove, and an adjusting rod (2) is threadedly connected in the threaded groove, the end of the adjusting rod (2) is rotatably connected to a side wall in the threaded groove away from the groove, the other axial side wall of the docking plate (1) is provided with a plurality of sliding adjustment openings connected to the threaded groove, and a lifting block is extended from the end of the clamping seat (3), the lifting block extends the sliding adjustment opening into the threaded groove, and is provided with a threaded hole threadedly connected to the adjusting rod (2).

4. The lathe processing parts fixture according to claim 1, characterized in that: The side wall of the clamp seat (3) is provided with sliding adjustment holes (31) which are distributed in parallel with each other. The sliding adjustment holes (31) are connected with the recessed part. Both sides of the recessed part are provided with sliding platforms. The end side wall of the door frame (4) is provided with a sliding block (42) which is slidably engaged with the sliding platform.

5. The lathe machining parts fixture according to claim 1, characterized in that: The end of the buffer clip (41) is slidably fitted with the inner wall of the recessed portion. When the fitting portion of the buffer clip (41) is subjected to reverse extrusion force from the special-shaped component, the end of the buffer clip (41) extends along the inner wall of the recessed portion, the curvature of the fitting portion becomes larger, and rebound potential energy is generated.

6. The lathe parts processing fixture according to claim 5, characterized in that: A side wall of the end of the buffer clamp (41) away from the clamping space is provided with a limiting piece (43) with a triangular cross-section, and the inner wall of the recessed portion is provided with a tooth groove that is slidably engaged with the limiting piece (43).

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