Lathe machining floating clamp

Abstract

The utility model relates to a lathe machining floating clamp which comprises a pull rod and at least two inclined wedge self-centering assemblies, the pull rod is sleeved with a main shaft connecting flange and a fixing base in a sliding mode, and the main shaft connecting flange is fixed to the fixing base; the inclined wedge self-centering assemblies are arranged on the fixing base in a penetrating mode, and the different inclined wedge self-centering assemblies are limited to different positions of the pull rod in the axial direction of the pull rod. When the pull rod is pushed and pulled, the pull rod drives the inclined wedge self-centering assembly to stretch out and draw back in the radial direction of the pull rod. The pull rod is sleeved with the at least two inclined wedge self-centering assemblies, when the pull rod is pushed and pulled, the pull rod drives the inclined wedge self-centering assemblies to stretch out and draw back in the radial direction of the pull rod, so that different faces of a workpiece are positioned, the machining stability of the workpiece is improved, and the machining qualification rate of the workpiece is increased; the problems that a clamped workpiece is loose and slippery when a three-jaw chuck is used for machining on a lathe, the machining stability is low, and the machining yield of the lathe is affected in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of clamps, in particular to a floating clamp for lathe machining. BACKGROUND

[0002] At present, the positioning modes commonly used in lathe machining of mechanical parts include three-jaw chucks, four-jaw chucks, tailstocks, V-shaped irons and sleeve type supports, and the commonly used axial positioning is generally realized by the end faces determined by front tailstocks, flange end faces and chuck jaws.

[0003] In the related art, the three-jaw chuck can only position one face of a workpiece in the use process, and the phenomenon of loose clamping of the workpiece occurs during lathe machining, the machining stability is low, and the pass rate of lathe machining is affected.

[0004] Therefore, it is necessary to design a new floating clamp for lathe machining to overcome the above problems. CONTENT OF THE INVENTION

[0005] The application provides a floating clamp for lathe machining, which can solve the technical problem that the three-jaw chuck in the related art will cause the phenomenon of loose clamping of the workpiece during lathe machining, the machining stability is low, and the pass rate of lathe machining is affected.

[0006] In a first aspect, the application provides a floating clamp for lathe machining, which comprises a pull rod and at least two inclined wedge self-centering assemblies, the pull rod is externally sleeved with a main shaft connecting flange and a fixed seat, the main shaft connecting flange is fixed with the fixed seat, the inclined wedge self-centering assemblies are arranged in the fixed seat, different inclined wedge self-centering assemblies are located at different positions of the pull rod along the axial direction of the pull rod, and the pull rod drives the inclined wedge self-centering assemblies to expand or contract along the radial direction of the pull rod when the pull rod is pushed or pulled.

[0007] In combination with the first aspect, in an implementation mode, each inclined wedge self-centering assembly comprises a sliding block, the sliding block is sleeved on the pull rod and located in the fixed seat, a spring is arranged between the sliding blocks of adjacent two inclined wedge self-centering assemblies, the sliding block is provided with a plurality of first inclined surfaces distributed along the circumferential direction of the sliding block, a centering jaw is connected to each first inclined surface of the sliding block, the centering jaw is arranged in the fixed seat, a second inclined surface is arranged on the side of the centering jaw close to the sliding block, and the second inclined surface is slidably attached to the first inclined surface.

[0008] In combination with the first aspect, in an implementation mode, each sliding block is provided with a plurality of dovetail grooves distributed along the circumferential direction of the sliding block, the first inclined surface is arranged in each dovetail groove, and the centering jaw is arranged in the dovetail groove.

[0009] With reference to the first aspect, in an embodiment, the centering claw comprises a support block, the support block is inserted into the fixing seat, and the support block is clamped to the sliding block, the second inclined surface is arranged on one side of the support block close to the sliding block, and the second inclined surface is in sliding fit with the first inclined surface.

[0010] With reference to the first aspect, in an embodiment, the centering claw further comprises a positioning sleeve, the positioning sleeve is fixed to one end of the support block away from the sliding block.

[0011] With reference to the first aspect, in an embodiment, the fixing seat is fixed with a support disc at one end away from the main shaft connecting flange, a plurality of support columns are arranged on one side of the support disc away from the fixing seat, and the axes of the plurality of support columns are parallel to the axis of the pull rod.

[0012] With reference to the first aspect, in an embodiment, the pull rod comprises a main body and a connecting portion, the main body is fixed to the connecting portion, the main body is sleeved with at least two inclined wedge self-centering assemblies, and the main body is arranged in the inner cavity of the main shaft connecting flange in communication with the fixing seat.

[0013] With reference to the first aspect, in an embodiment, a limiting nut is fixed at the connection between the main body and the connecting portion, the limiting nut is in clearance fit with the main shaft connecting flange and the fixing seat, and the clearance is 0.4-0.6 mm.

[0014] With reference to the first aspect, in an embodiment, a limiting bolt is fixed at one end of the main body away from the main shaft connecting flange, a limiting step is arranged at one end of the main body close to the main shaft connecting flange, at least two inclined wedge self-centering assemblies are limited between the limiting bolt and the limiting step in the axial direction of the main body, and springs are arranged between adjacent two inclined wedge self-centering assemblies.

[0015] With reference to the first aspect, in an embodiment, the main shaft connecting flange is provided with a plurality of mounting holes.

[0016] The technical scheme provided by the embodiments has the beneficial effects that:

[0017] By sleeving at least two inclined wedge self-centering assemblies on the pull rod, the at least two inclined wedge self-centering assemblies are distributed in the axial direction of the pull rod, when the pull rod is pushed and pulled, the pull rod drives the inclined wedge self-centering assemblies to stretch and contract in the radial direction of the pull rod, so that different surfaces of the workpiece are positioned, the machining stability and the machining qualification rate of the workpiece are improved, the phenomenon that the three-jaw chuck slips when machining on the lathe is solved, the machining stability is low, and the qualification rate of the lathe machining is affected. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to make the technical solutions in the embodiments of the present application clearer, the accompanying drawings needed in the embodiment description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0019] Figure 1 A structure schematic diagram of the lathe machining floating clamp provided by the embodiment of the present application is shown in the figure.

[0020] Figure 2 A sectional view of the lathe machining floating clamp provided by the embodiment of the present application is shown in the figure.

[0021] Figure 3 A sectional view of the lathe machining floating clamp and the workpiece provided by the embodiment of the present application is shown in the figure.

[0022] Figure 4 A structure schematic diagram of the slider and the centering claw provided by the embodiment of the present application is shown in the figure.

[0023] Figure 5 A top view of the slider and the centering claw provided by the embodiment of the present application is shown in the figure.

[0024] Figure 6 A sectional view of the slider and the centering claw provided by the embodiment of the present application is shown in the figure. Figure 5 A sectional view of the slider and the centering claw provided by the embodiment of the present application is shown in the figure.

[0025] In the figure: 1, pull rod; 11, main body; 12, connecting part; 13, limiting nut; 14, limiting bolt; 2, main shaft connecting flange; 21, mounting hole; 3, fixed seat; 4, inclined wedge self-centering assembly; 41, slider; 411, first inclined surface; 412, dovetail groove; 42, centering claw; 421, second inclined surface; 422, supporting block; 423, positioning sleeve; 5, spring; 6, supporting disc; 7, supporting column. DETAILED DESCRIPTION

[0026] In order to make the technical solutions in the embodiments of the present application clearer, the accompanying drawings needed in the embodiment description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0027] The embodiment of the present application provides a lathe machining floating clamp, which can solve the technical problem that the three-jaw chuck will appear loose when machining the workpiece on the lathe, the machining stability is low, and the qualified rate of lathe machining is affected.

[0028] Referring to Figures 1-3As shown, the embodiment of the present application provides a lathe machining floating clamp, which comprises a pull rod 1 and at least two inclined wedge self-centering assemblies 4, the pull rod 1 is sleeved with a main shaft connecting flange 2 and a fixed seat 3 outside, the main shaft connecting flange 2 is fixed with the fixed seat 3, the inclined wedge self-centering assemblies 4 are arranged in the fixed seat 3, and different inclined wedge self-centering assemblies 4 are arranged at different positions of the pull rod 1 along the axial direction of the pull rod 1; when the pull rod 1 is pushed or pulled, the pull rod 1 drives the inclined wedge self-centering assemblies 4 to stretch or contract along the radial direction of the pull rod 1.

[0029] In the embodiment, the main shaft connecting flange 2 is bolted with the fixed seat 3, the number of the at least two inclined wedge self-centering assemblies 4 can be two or three or more, and preferably, two inclined wedge self-centering assemblies 4 are arranged in the embodiment, the two inclined wedge self-centering assemblies 4 are arranged at different positions of the pull rod 1 along the axial direction of the pull rod 1, so that the workpiece can be positioned at two different surfaces, the machining stability and the machining qualification rate of the workpiece are improved, when the pull rod 1 is pulled, the pull rod 1 can drive the inclined wedge self-centering assemblies 4 to contract inwardly, and when the pull rod 1 is pushed, the pull rod 1 can drive the inclined wedge self-centering assemblies 4 to stretch outwardly. In other embodiments, when the pull rod 1 is pulled, the pull rod 1 can drive the inclined wedge self-centering assemblies 4 to stretch outwardly, and when the pull rod 1 is pushed, the pull rod 1 can drive the inclined wedge self-centering assemblies 4 to contract inwardly.

[0030] In the embodiment, at least two inclined wedge self-centering assemblies 4 are sleeved on the pull rod 1, and the at least two inclined wedge self-centering assemblies 4 are arranged along the axial direction of the pull rod 1, when the pull rod 1 is pushed or pulled, the pull rod 1 drives the inclined wedge self-centering assemblies 4 to stretch or contract along the radial direction of the pull rod 1, so that the different surfaces of the workpiece are positioned, the machining stability and the machining qualification rate of the workpiece are improved, and the phenomenon that the three-jaw chuck is machined on the lathe and the clamped workpiece is loose is solved, the machining stability is low, and the qualification rate of the lathe machining is affected.

[0031] Further, referring to Figures 1-3 As shown, in some embodiments, each inclined wedge self-centering assembly 4 comprises a sliding block 41, the sliding block 41 is arranged on the pull rod 1, the sliding block 41 is arranged in the fixed seat 3, a spring 5 is arranged between the sliding blocks 41 of two adjacent inclined wedge self-centering assemblies 4, the sliding block 41 is provided with a plurality of first inclined surfaces 411 arranged along the circumferential direction of the sliding block 41, and a centering clamping jaw 42 is arranged on each first inclined surface 411 of the sliding block 41, the centering clamping jaw 42 is arranged in the fixed seat 3, one side of the centering clamping jaw 42 close to the sliding block 41 is provided with a second inclined surface 421, and the second inclined surface 421 is arranged in sliding fit with the first inclined surface 411.

[0032] In the embodiment, the number of the centering clamping jaws 42 corresponding to each of the inclined wedge self-centering assemblies 4 can be two or three or more, preferably, the number of the centering clamping jaws 42 corresponding to each of the inclined wedge self-centering assemblies 4 can be three. When the pull rod 1 is pulled, the pull rod 1 drives the sliding block 41 to move downward, the sliding block 41 clamps the centering clamping jaw 42, the centering clamping jaw 42 slides along the first inclined surface 411 and contracts inward, facilitating the removal of the workpiece. When the pull rod 1 is pushed, the pull rod 1 drives the sliding block 41 to move upward, the centering clamping jaw 42 is elongated outward under the action of the first inclined surface 411 to fix the workpiece. The sliding blocks 41 of the two adjacent inclined wedge self-centering assemblies 4 are elastically connected by the spring 5. When one of the inclined wedge self-centering assemblies 4 is stuck with the workpiece, the pull rod 1 can still drive the other inclined wedge self-centering assembly 4 to stretch and contract along the radial direction of the pull rod 1, so that each sliding block 41 has an independent floating function. The spring 5 can be a rectangular spring. In other embodiments, the sliding block 41 of each inclined wedge self-centering assembly 4 can be fixedly arranged at different positions of the pull rod 1.

[0033] Further, referring to Figures 4-6 In some embodiments, each sliding block 41 is provided with a plurality of dovetail grooves 412 distributed along the circumferential direction thereof, and the first inclined surface 411 is arranged in each dovetail groove 412, and the centering clamping jaw 42 is clamped in the dovetail groove 412.

[0034] In the embodiment, the dovetail groove 412 limits the centering clamping jaw 42 to prevent the centering clamping jaw 42 from falling out of the sliding block 41 during the movement in the radial direction of the pull rod 1. The number of the plurality of dovetail grooves 412 can be two or three or more, preferably, the number of the plurality of dovetail grooves 412 is three, and the three dovetail grooves 412 are distributed along the circumferential direction of the sliding block 41.

[0035] Further, referring to Figure 2 , Figure 4 and Figure 6 In some embodiments, the centering clamping jaw 42 comprises a supporting block 422, the supporting block 422 is inserted into the fixed seat 3, and the supporting block 422 is clamped to the sliding block 41. The second inclined surface 421 is arranged on the side of the supporting block 422 close to the sliding block 41, and the second inclined surface 421 is in sliding fit with the first inclined surface 411.

[0036] In the embodiment, the support block 422 can be provided in a cylindrical or other shape, the support block 422 is inserted into the fixed seat 3, and is attached to the sliding block 41 through the second inclined surface 421. When the pull rod 1 is pulled, the pull rod 1 drives the sliding block 41 to move downward, the sliding block 41 clamps the support block 422, so that the support block 422 slides along the first inclined surface 411 and shrinks inward, facilitating the removal of the workpiece. When the pull rod 1 is pushed, the pull rod 1 drives the sliding block 41 to move upward, so that the support block 422 is elongated outward under the action of the first inclined surface 411, so as to fix the workpiece.

[0037] Further, referring to Figures 4-6 As shown in the drawings, in some embodiments, the centering clamping jaw 42 further comprises a positioning sleeve 423 fixed to one end of the support block 422 away from the sliding block 41.

[0038] In the embodiment, the positioning sleeve 423 is connected with the support block 422. When the wedge self-centering assembly 4 is elongated outward, the outer side of the positioning sleeve 423 is attached to the inner wall of the workpiece. Multiple positioning sleeves 423 position the workpiece. The shape of the positioning sleeve 423 is designed according to the shape of the workpiece. The positioning sleeve 423 can be provided in a fan shape or other shape, and the positioning sleeve 423 can be replaced in time according to the processing needs of different workpieces.

[0039] Further, referring to Figures 1-3 As shown in the drawings, in some embodiments, the fixed seat 3 is provided with a support disc 6 at one end away from the main shaft connecting flange 2. The support disc 6 is provided with a plurality of support columns 7 on the side away from the fixed seat 3. The axes of the plurality of support columns 7 are parallel to the axis of the pull rod 1.

[0040] In the embodiment, the support disc 6 is connected with the fixed seat 3. The number of the plurality of support columns 7 can be two or three or more. Preferably, the number of the plurality of support columns 7 is three. The three support columns 7 are distributed along the circumferential direction of the support disc 6 and fixed to the edge of the support disc 6 to support the end of the workpiece. The axes of the plurality of support columns 7 are parallel to the axis of the pull rod 1, so that the plurality of support columns 7 can abut against the end of the workpiece, further improving the processing stability of the workpiece.

[0041] Further, referring to Figure 2 As shown in the drawings, in some embodiments, the pull rod 1 comprises a main body 11 and a connecting portion 12. The main body 11 is fixed with the connecting portion 12. The main body 11 is sleeved with at least two wedge self-centering assemblies 4. The main body 11 is slidably arranged in the inner cavity of the main shaft connecting flange 2 and the fixed seat 3.

[0042] In the embodiment, the main body 11 is threadedly connected with the connecting portion 12, the main body 11 limits the sliding block 41 of each inclined wedge self-centering assembly 4, the main body 11 is slidably arranged in the inner cavity of the main shaft connecting flange 2 and the fixed seat 3, and the connecting portion 12 extends out of the main shaft connecting flange 2 so as to be pushed and pulled.

[0043] Further, referring to Figure 2 In some embodiments, as shown in the figure, a limiting nut 13 is fixedly arranged at the joint of the main body 11 and the connecting portion 12, the limiting nut 13 is gap-fitted with the main shaft connecting flange 2 and the fixed seat 3, and the gap is set to be 0.4-0.6mm.

[0044] In the embodiment, the limiting nut 13 is threadedly connected with the main body 11 and the connecting portion 12, the limiting nut 13 is limited in the opening of the fixed seat 3, the limiting nut 13 is gap-fitted with the main shaft connecting flange 2 and the fixed seat 3, the axis of the main body 11 coincides with the axis of the fixed seat 3, and the sliding block 41 of each inclined wedge self-centering assembly 4 can slide in the fixed seat 3 along the axis of the main body 11, the gap between the limiting nut 13 and the main shaft connecting flange 2 and the gap between the limiting nut 13 and the fixed seat 3 can be set to be 0.4-0.6mm, and preferably, the gap between the limiting nut 13 and the main shaft connecting flange 2 and the gap between the limiting nut 13 and the fixed seat 3 are set to be 0.5mm.

[0045] Further, referring to Figure 2 In some embodiments, as shown in the figure, a limiting bolt 14 is fixedly arranged at the end of the main body 11 away from the main shaft connecting flange 2, a limiting step is arranged at the end of the main body 11 close to the main shaft connecting flange 2, at least two inclined wedge self-centering assemblies 4 are limited between the limiting bolt 14 and the limiting step along the axial direction of the main body 11, and adjacent two inclined wedge self-centering assemblies 4 are clamped with a spring 5.

[0046] In the embodiment, the limiting bolt 14 is threadedly connected with the main body 11, the limiting bolt 14 limits the sliding block 41 away from the main shaft connecting flange 2, the limiting step limits the sliding block 41 close to the main shaft connecting flange 2, and at least two inclined wedge self-centering assemblies 4 are limited between the limiting bolt 14 and the limiting step along the axial direction of the main body 11, so as to prevent at least two inclined wedge self-centering assemblies 4 from being detached from the pull rod 1 in the radial expansion and contraction process along the pull rod 1.

[0047] Further, referring to Figures 1-3 In some embodiments, as shown in the figure, the main shaft connecting flange 2 is provided with a plurality of mounting holes 21.

[0048] In the embodiment, the main shaft connecting flange 2 is fixed to the main shaft of the lathe through the mounting bolt passing through the mounting hole 21, the number of the plurality of mounting holes 21 can be two or three or more, preferably, the number of the plurality of mounting holes 21 is three, and the three mounting holes 21 are distributed along the circumferential direction of the main shaft connecting flange 2.

[0049] In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] It should be noted that in the present application, relational terms such as "first" and "second", and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device. Without more limitations, the element defined by the sentence "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0051] The above description is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications of these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A lathe machining floating fixture, characterized by, It includes: Pull rod (1), the pull rod (1) outer sliding sleeve is provided with main shaft connecting flange (2) and fixed seat (3), the main shaft connecting flange (2) is fixed with the fixed seat (3); At least two inclined wedge self-centering assemblies (4) are provided, the inclined wedge self-centering assemblies (4) are provided in the fixed seat (3), and different inclined wedge self-centering assemblies (4) are located at different positions of the pull rod (1) along the axial direction of the pull rod (1); When the pull rod (1) is pushed and pulled, the pull rod (1) drives the inclined wedge self-centering assembly (4) to stretch and contract along the radial direction of the pull rod (1).

2. The lathe machining floating fixture of claim 1, wherein, Each inclined wedge self-centering assembly (4) includes a sliding block (41), the sliding block (41) is located in the pull rod (1), and the sliding block (41) is slidably arranged in the fixed seat (3), a spring (5) is arranged between the sliding blocks (41) of adjacent two inclined wedge self-centering assemblies (4), the sliding block (41) is provided with a plurality of first inclined surfaces (411) distributed along the circumferential direction thereof, And the sliding block (41) is provided with a centering clamping jaw (42) corresponding to each first inclined surface (411), the centering clamping jaw (42) is provided in the fixed seat (3), and the side of the centering clamping jaw (42) close to the sliding block (41) is provided with a second inclined surface (421), and the second inclined surface (421) is slidably attached to the first inclined surface (411).

3. The lathe machining floating fixture of claim 2, wherein, Each sliding block (41) is provided with a plurality of dovetail grooves (412) distributed along the circumferential direction thereof, each dovetail groove (412) is provided with the first inclined surface (411), and the centering clamping jaw (42) is clamped in the dovetail groove (412).

4. The lathe machining floating fixture of claim 2, wherein, The centering clamping jaw (42) includes a support block (422), the support block (422) is inserted into the fixed seat (3), and the support block (422) is clamped to the sliding block (41), the side of the support block (422) close to the sliding block (41) is provided with the second inclined surface (421), and the second inclined surface (421) is slidably attached to the first inclined surface (411).

5. The lathe machining floating fixture of claim 4, wherein, The centering clamping jaw (42) further includes a positioning sleeve (423), and the positioning sleeve (423) is fixed to one end of the support block (422) away from the sliding block (41).

6. The lathe machining floating fixture of claim 1, wherein, The end of the fixed seat (3) away from the main shaft connecting flange (2) is fixedly provided with a support disc (6), and the side of the support disc (6) away from the fixed seat (3) is provided with a plurality of support columns (7), and the axes of the plurality of support columns (7) are parallel to the axis of the pull rod (1).

7. The lathe machining floating fixture of claim 1, wherein, The pull rod (1) includes a main body (11) and a connecting portion (12), the main body (11) is fixed with the connecting portion (12), the main body (11) is sleeved with at least two inclined wedge self-centering assemblies (4), and the main body (11) is slidably arranged in the inner cavity of the main shaft connecting flange (2) and the fixed seat (3).

8. The lathe machining floating fixture of claim 7, wherein, The connecting part (12) of the main body (11) is fixedly connected with the main shaft connecting flange (2), and the main shaft connecting flange (2) is fixedly connected with the fixed seat (3).

9. The lathe machining floating fixture of claim 7, wherein, The main body (11) is fixedly connected with a limiting bolt (14) at one end away from the main shaft connecting flange (2), and a limiting step is arranged at one end of the main body (11) close to the main shaft connecting flange (2), at least two inclined wedge self-centering assemblies (4) are limited in the limiting bolt (14) and the limiting step along the axial direction of the main body (11), and adjacent two inclined wedge self-centering assemblies (4) are clamped with a spring (5).

10. The lathe machining floating fixture of claim 1, wherein, The main shaft connecting flange (2) is provided with a plurality of mounting holes (21).

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