Floating clamping jaw clamp for ring part machining

Abstract

The utility model discloses a floating claw fixture for ring processing, the floating claw fixture comprises a plurality of floating claws, each floating claw comprises a supporting seat, a claw and a positioning piece, the claw is installed on the supporting seat through the positioning piece, the claw is used for abutting against the inner circle of the ring, and the positioning piece is arranged on the supporting seat. The supporting base is further provided with a blocking table used for limiting the left-right floating range of the clamping jaw, and gaps are reserved between the clamping jaw and the positioning piece and between the clamping jaw and the blocking table so that the clamping jaw can float left and right relative to the positioning piece. The gaps are formed between the clamping jaws and the positioning piece and between the clamping jaws and the blocking table, so that the clamping jaws can float left and right relative to the positioning piece within the limited range, and the clamping jaws abut against the inner circle of the ring piece through the supporting arms; the supporting arms on the multiple clamping jaws are all in contact with the inner circle of the workpiece through left-right slight floating adjustment of the clamping jaws, stress is uniform in the machining process, and large deformation is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to clamping auxiliary equipment technical field, in particular, relate to a kind of floating chuck clamp for ring piece processing. BACKGROUND

[0002] Turning is a part of machining, and lathe machining is mainly used for turning workpieces in rotation by turning tools. During turning operation, the workpiece needs to be effectively fixed and loaded, so a clamp is used to clamp and stabilize the workpiece, thereby ensuring stable operation of the workpiece during turning displacement.

[0003] Patent CN215880193U discloses a micro-floating wide three-jaw clamp, which ensures that the three clamping jaws can slightly swing through gap fitting and end face floating gap. When the workpiece outer circle runout is large, the clamp force is uniformly distributed through self-adjustment, eliminating the eccentricity error of clamping and effectively preventing the inner hole eccentricity of the hot boring hole from exceeding the tolerance, thereby reducing the scrap rate of the subsequent gear grinding process. The three-jaw clamp is simple in structure, practical, easy to install and operate, and suitable for clamping outer circles. Patent CN210360464U discloses a floating chuck for clamping ring-shaped bodies, which realizes clamping adjustment between the clamping end and the peripheral wall of the ring-shaped body through floating and swinging displacement of the clamping part, and meets the demand for stable clamping of irregular outer edge rough bearing rings. A plurality of fixed screw holes are arranged on the radial displacement slide in radial intervals, and the installation position of the clamping part can be selected according to the diameter of the workpiece, thereby improving the adaptability of the floating chuck. The device is simple in overall design, meets the demand for stable clamping of rough bearing rings, and is efficient in clamping operation, and is suitable for clamping outer circles.

[0004] Currently, when machining the outer circle of a thin-walled ring, a four-jaw chuck is usually used to clamp the inner circle for turning. Due to the small number of clamping points, the force is unevenly distributed during turning, resulting in large deformation of the outer circle and causing size tolerance, which leads to unqualified ring outer circle size. SUMMARY

[0005] The utility model provides a kind of floating chuck clamp for ring piece processing, to solve the technical problems that the existing floating chuck clamp is not suitable for inner circle clamping, and the four-jaw chuck suitable for clamping inner circle is unevenly stressed, resulting in large deformation of the outer circle during turning of thin-walled ring.

[0006] According to one aspect of the present invention, a floating jaw fixture for machining ring parts is provided. The floating jaw fixture includes a plurality of floating jaws, each floating jaw including a support base, a jaw, and a positioning element. The jaw is mounted on the support base via the positioning element and is used to abut against the inner circle of the ring part. The support base is also provided with a stop for limiting the left and right floating range of the jaw. A gap is left between the jaw and the positioning element and between the jaw and the stop, so that the jaw can float left and right relative to the positioning element to maintain the clamping state between the jaw and the inner circle of the ring part.

[0007] Furthermore, the baffle includes a first baffle and a second baffle for limiting the left and right floating range of the chuck. The surfaces on the left and right sides of the chuck that are in contact with the first baffle and the second baffle are set as planes. The first baffle and the second baffle are provided with gaps and are arranged parallel to each other with the planes on the left and right sides of the chuck.

[0008] Furthermore, the support base is provided with a first positioning hole, and the claw is provided with a second positioning hole. The first positioning hole and the second positioning hole are coaxially arranged, and the positioning element passes through the first positioning hole and the second positioning hole to install the claw on the support base.

[0009] Furthermore, the end of the first positioning hole away from the chuck is provided with a threaded hole, and the end of the first positioning hole near the chuck is provided with a limiting hole.

[0010] Furthermore, the positioning component includes a threaded portion, a first optical axis, a second optical axis, and a fixing portion. The threaded portion is used to mate with a threaded hole, and the first and second optical axes are used to mate with a limiting hole and a second positioning hole, respectively.

[0011] Furthermore, the gap between the second optical axis and the second positioning hole is 0.02-0.03 mm, and the gap between the fixing part and the end face of the claw is 0.03-0.06 mm.

[0012] Furthermore, the first and second stops are V-shaped, and both the first and second stops are provided with threaded holes, which are used to abut the left and right sides of the chuck by screws.

[0013] Furthermore, the gap between the first and second stops and the planes on the left and right sides of the chuck is 0.2-0.3 mm.

[0014] Furthermore, the end face of the support arm that contacts the inner circle of the ring has the same curvature as the ring.

[0015] Furthermore, the end face of the support arm that contacts the inner circle of the ring has several discontinuous grooves.

[0016] This utility model has the following beneficial effects:

[0017] This utility model's floating jaw fixture is equipped with several floating jaws. By setting several floating jaws to hold the inner circle of the ring, the number of holding points is increased, making the force on the inner circle of the ring uniform during the turning process and improving the pass rate of the ring turning process. The jaws are mounted on the support base through positioning components, allowing the jaws to move relative to the support base. The support base is also equipped with a stop for limiting the left and right floating range of the jaws. The stop limits the left and right floating range of the jaws and controls the gap between the jaws and the positioning components, as well as between the jaws and the stop, so that the jaws can float left and right relative to the positioning components within the set range. When turning the ring, the jaws abut against the inner circle of the ring through the support arm. When the roundness runout of the inner circle of the ring is large, the jaws are slightly adjusted by floating left and right to ensure that all jaws are in contact with the inner circle of the ring, so that the force is uniform during processing. At the same time, the multiple jaws make the clamping force of the inner circle evenly distributed, which can avoid large deformation, thus making it suitable for turning the outer circle of thin-walled rings.

[0018] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. These will be further described in detail below. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 This is a schematic diagram of the floating jaw clamp of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of the floating chuck of this utility model.

[0022] Figure 3 This is a schematic diagram of the structure of the support base of this utility model.

[0023] Figure 4 This is a schematic diagram of the structure of the chuck claw of this utility model.

[0024] Figure 5 This is a schematic diagram of the positioning component of this utility model.

[0025] In the diagram: 1. Floating jaw; 2. Support base; 3. Jaw; 4. Positioning component; 5. Stop; 6. Ring component; 7. Support arm; 8. First positioning hole; 9. Second positioning hole; 10. Threaded part; 11. First optical axis; 12. Second optical axis; 13. Fixing part; 14. Groove; 15. Base; 16. Screw. Detailed Implementation

[0026] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0027] An embodiment of this utility model provides a floating jaw fixture for processing ring parts. The floating jaw fixture includes a plurality of floating jaws 1. Each floating jaw 1 includes a support base 2, a jaw 3, and a positioning element 4. The jaw 3 is mounted on the support base 2 through the positioning element 4. The jaw 3 is used to abut against the inner circle of the ring part 6. The support base 2 is also provided with a stop 5 for limiting the left and right floating range of the jaw 3. There are gaps between the jaw 3 and the positioning element 4 and between the jaw 3 and the stop 5, so that the jaw 3 can float left and right relative to the positioning element 4 to maintain the clamping state between the jaw and the inner circle of the ring part.

[0028] See Figures 1 to 5 The floating jaws 1 of the floating jaw fixture are all mounted on the chassis 15 via support bases 2. The number of floating jaws 1 can be two, three, four, or more. In this application, it is preferred to set the number of floating jaws 1 to four, which are evenly distributed in a ring on the inner circle of the ring 6. The multiple floating jaws 1 are provided to increase the number of clamping points, ensuring uniform force distribution on the ring 6 during machining and reducing deformation of the outer wall of the ring 6. Furthermore, to enable the floating jaw fixture to process rings 6 of different diameters, the chassis 15 is provided with a slide rail, and the support base 2 is provided with a groove corresponding to the slide rail. The support base 2 can move relative to the slide rail. By adjusting the position of the support base 2 relative to the slide rail, ring support structures of different diameters can be formed. The jaws 3 are mounted on the support base 2 via positioning elements 4, such as positioning pins or positioning shafts, to allow the jaws 3 to rotate relative to the support base 2. A certain gap exists between the jaws 3 and the positioning elements 4, allowing the jaws 3 to move flexibly and without obstruction. The support base 2 is also provided with a stop 5 for limiting the left and right floating range of the claw 3. The stop 5 is fixedly set on the support base 2, and there is a certain distance between the stop 5 and the claw 3. The stop 5 preferably has two limiting platforms respectively set along the left and right floating direction of the claw 3, and the two limiting platforms are symmetrically set. At the same time, the distance between the claw 3 and the two limiting platforms is consistent to ensure that the left and right floating range of the claw 3 is consistent. Therefore, both the claw 3 and the stop 5 are preferably axially symmetrical structures to ensure that the left and right floating range of the claw 3 is consistent.

[0029] The floating jaw fixture of this utility model is provided with several floating jaws 1. By setting several floating jaws 1 to hold the inner circle of the ring 6, the number of holding points is increased, so that the inner circle of the ring 6 is subjected to uniform force during the turning process, thereby improving the pass rate of the ring turning process. The jaws 3 are mounted on the support base 2 through the positioning element 4, so that the jaws 3 can move relative to the support base 2. The support base 2 is also provided with a stop 5 for limiting the left and right floating range of the jaws 3. The stop 5 limits the left and right floating range of the jaws 3, and there is a gap between the jaws 3 and the positioning element 4 and between the jaws 3 and the stop 5, so that the jaws 3 can float left and right relative to the positioning element 4 within the set range. When turning the ring 6, the jaws 3 abut against the inner circle of the ring 6 through the support arm 7. When the roundness of the inner circle of the ring 6 is large, the jaws 3 are slightly adjusted left and right to ensure that several jaws 3 are in contact with the inner circle of the ring 6, so that the force is uniform during processing. At the same time, several jaws 3 make the clamping force of the inner circle evenly distributed, which can avoid large deformation.

[0030] In the embodiments of this utility model, see Figure 1 The jaws 3 are provided with a plurality of support arms 7 for abutting the inner circle of the ring 6. These support arms 7 form an arc similar to the inner circle of the ring 6, creating a ring-shaped support structure. The arc of the support arms 7 allows the jaws to maintain a holding state with the inner circle of the ring even when there is significant runout during turning. The plurality of floating jaws 1 are evenly distributed along the ring and abut the inner circle of the ring 6, facilitating the turning of the outer circle of the ring 6. This ensures a uniform distribution of force points on the ring 6 in contact with the floating jaws 1. One, two, or more support arms 7 can be provided on the jaws 3. Preferably, the support arms 7 are evenly spaced, forming a ring-shaped support structure with evenly distributed holding points. This further improves the uniformity of force on the inner circle of the thin-walled ring 6, reduces deformation during turning of the outer circle, and increases the ring's pass rate.

[0031] In an embodiment of this utility model, the baffle 5 includes a first baffle and a second baffle for limiting the left and right floating range of the claw 3. The surfaces on the left and right sides of the claw 3 that are in contact with the first and second baffles are set as planes. The first and second baffles are provided with gaps and are arranged parallel to each other with respect to the planes on the left and right sides of the claw 3. The gaps between the claw 3 and the first and second baffles allow the claw 3 to float left and right within a set range. By setting the surfaces on the left and right sides of the claw 3 that are in contact with the first and second baffles as planes, the left and right floating range of the claw 3 can be controlled, so that the inner circle of the ring 6 is subjected to uniform force.

[0032] In the embodiments of this utility model, see Figure 3The support base 2 has a first positioning hole 8, and the claw 3 has a second positioning hole 9. The first positioning hole 8 and the second positioning hole 9 are coaxially arranged. The positioning element 4 passes through the first positioning hole 8 and the second positioning hole 9 to mount the claw 3 on the support base 2. The first positioning hole 8 and the second positioning hole 9 are both through holes, and the first positioning hole 8 and the second positioning hole 9 are arranged opposite to each other. In order to have a gap between the claw 3 and the positioning element 4, the diameter of the second positioning hole 9 is larger than the diameter of the positioning element 4.

[0033] In the embodiments of this utility model, see Figure 3 The first positioning hole 8 has a threaded hole at the end away from the jaw 3, and a limiting hole at the end of the first positioning hole 8 near the jaw 3. The threaded hole is an internal thread, used to engage with the external thread on the positioning member 4 to tighten the positioning member 4 and fix it. The limiting hole is used to fix the positioning member 4. Preferably, the diameter of the threaded hole is smaller than the diameter of the limiting hole, and the positioning member 4 is fixed on the support base 2 by the engagement of the threaded hole and the limiting hole.

[0034] In the embodiments of this utility model, see Figure 5 The positioning component 4 includes a threaded portion 10, a first optical axis 11, a second optical axis 12, and a fixing portion 13. The threaded portion 10 is used to mate with a threaded hole, and the first optical axis 11 and the second optical axis 12 are used to mate with a limiting hole and a second positioning hole 9, respectively. The diameters of the threaded portion 10, the first optical axis 11, the second optical axis 12, and the fixing portion 13 in the positioning component 4 increase sequentially from small to large. The threaded portion 10 has external threads, the first optical axis 11 and the second optical axis 12 are stepped optical axes, and the fixing portion 13 has a hexagonal end face structure, which facilitates the connection of a tightening tool to screw the threaded portion 10 of the positioning component 4 into the threaded hole in the first positioning hole 8 for fixing. The first optical axis 11 and the second optical axis 12 are respectively used to cooperate with the limiting hole on the support base 2 and the second positioning hole 9 on the claw 3. The diameter of the second positioning hole 9 is larger than the diameter of the second optical axis 12, so as to form a gap between the claw 3 and the positioning member 4. The height of the second optical axis 12 is greater than the height of the claw 3, so as to form a gap between the end face of the claw 3 and the fixing part 13.

[0035] In this embodiment of the invention, the gap between the second optical axis 12 and the second positioning hole 9 is 0.02-0.03 mm, and the gap between the fixing part 13 and the end face of the jaw 3 is 0.03-0.06 mm. The gap between the second optical axis 12 and the second positioning hole 9 can be any value among 0.02 or 0.03 mm, and the gap between the fixing part 13 and the end face of the jaw 3 can be any value among 0.03 mm, 0.04 mm, 0.05 mm, or 0.06 mm. By ensuring that the gaps between the fixing part 13 and the end face of the jaw 3, and between the second optical axis 12 and the second positioning hole 9 are within the aforementioned range, the jaw 3 can swing within a range of approximately 1° to the left and right around the positioning member 4. During the alignment process, the floating jaw 1 can swing slightly within a range of approximately 1° to the left and right. When the roundness of the workpiece's inner circle fluctuates significantly, self-adjustment ensures that both ends of the jaw 3 are in contact with the inner circle of the workpiece, resulting in a uniform distribution of clamping force at several clamping points on the inner circle. This ensures uniform force distribution during processing and avoids significant deformation.

[0036] In the embodiments of this utility model, see Figure 3 The baffle 5 has a V-shaped structure with a first baffle and a second baffle. Both the first and second baffles are provided with threaded holes for screws 16 to abut against the left and right sides of the claw 3. The baffle 5 is a protruding structure fixedly mounted on the support base 2, and there is a fixed distance between the baffle 5 and the first positioning hole 8 on the support base 2. In order to limit the left and right floating of the claw 3, this application sets the baffle 5 as a symmetrical V-shaped structure, with the first and second baffles at the same distance from the claw 3. In addition, in order to limit the movement of the claw 3 relative to the first and second baffles within a set range, the surfaces of the claw 3 that contact the first and second baffles are set as planar structures, so that the first and second baffles are parallel to the planar structures on the claw 3 and have gaps, which can limit the claw 3 from swinging within a certain range. In addition, in this embodiment, threaded holes are provided on the first and second stops. By passing the screw 16 through the threaded holes on the first and second stops respectively, the pawl 3 can be tightened as needed by tightening the screw 16, so that the pawl 3 cannot swing left and right around the positioning member 4.

[0037] In an embodiment of this utility model, the gap between the stop 5 and the claw 3 is 0.2-0.3 mm. When the claw 3 is in a symmetrical position along the axis of the support 2, the gap between the first and second stops and the planar structure on the claw 3 is any value between 0.2 mm and 0.3 mm, allowing the claw 3 to swing within a range of about 1° around the positioning member 4.

[0038] In the embodiments of this utility model, see Figure 4The jaws are equipped with support arms 7, and the end face of the support arm 7 that contacts the inner circle of the ring 6 has the same curvature as the ring 6. The contact surface between the support arm 7 and the inner circle of the ring 6 is an arc surface with the same arc size as the inner circle curvature of the ring 6, allowing for a tight fit with the inner circle of the ring 6. The jaws 3 are equipped with support arms 7, and there are more than one support arm 7 to increase the number of clamping points, reducing deformation of the outer circle when machining the outer circle of the thin-walled ring 6. In this embodiment, there are two support arms 7, respectively located on the left and right sides of the jaws 3, symmetrically arranged, with a certain gap between the two support arms 7. In this embodiment, four floating jaws 1 are provided, resulting in eight support arms 7. The eight support arms 7 are spaced apart, ensuring a uniform distribution of contact points between the support arms 7 and the inner circle of the ring 6, thus ensuring uniform force distribution on the ring 6.

[0039] In the embodiments of this utility model, see Figure 4 The end face of the support arm 7 that contacts the inner circle of the ring 6 has several discontinuous grooves 14. The arc surface of the support arm 7 has rounded corners on both sides to avoid damaging the inner circle of the ring 6. Furthermore, the arc surface of the support arm 7 is also provided with several discontinuous grooves 14 to avoid interference or over-positioning of the thin-walled ring 6.

[0040] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A floating jaw clamp for machining ring parts, characterized in that, The floating jaw clamp includes several floating jaws (1). Each floating jaw (1) includes a support base (2), a jaw (3), and a positioning element (4). The jaw (3) is mounted on the support base (2) via the positioning element (4). The jaw (3) is used to abut against the inner circle of the ring (6). The support base (2) is also provided with a stop (5) for limiting the left and right floating range of the jaw (3). There is a gap between the jaw (3) and the positioning element (4) and between the jaw (3) and the stop (5) to allow the jaw (3) to float left and right relative to the positioning element (4) to maintain the clamping state between the jaw and the inner circle of the ring.

2. The floating jaw fixture for ring machining according to claim 1, characterized in that, The baffle (5) includes a first baffle and a second baffle for limiting the left and right floating range of the claw (3). The surfaces on the left and right sides of the claw (3) that are in contact with the first baffle and the second baffle are set as planes. The first baffle and the second baffle are provided with gaps between them and the planes on the left and right sides of the claw (3) and are arranged parallel to each other.

3. The floating jaw fixture for ring machining according to claim 1, characterized in that, The support base (2) is provided with a first positioning hole (8) and the claw (3) is provided with a second positioning hole (9). The first positioning hole (8) and the second positioning hole (9) are coaxially arranged. The positioning member (4) passes through the first positioning hole (8) and the second positioning hole (9) to install the claw (3) on the support base (2).

4. The floating jaw fixture for ring machining according to claim 3, characterized in that, The first positioning hole (8) has a threaded hole at the end away from the chuck (3), and a limiting hole at the end of the first positioning hole (8) close to the chuck (3).

5. The floating jaw fixture for ring machining according to claim 4, characterized in that, The positioning component (4) includes a threaded part (10), a first optical axis (11), a second optical axis (12), and a fixing part (13). The threaded part (10) is used to cooperate with the threaded hole in the first positioning hole (8), and the first optical axis (11) and the second optical axis (12) are used to cooperate with the limiting hole and the second positioning hole (9), respectively.

6. The floating jaw fixture for ring machining according to claim 5, characterized in that, The gap between the second optical axis (12) and the second positioning hole (9) is 0.02-0.03 mm, and the gap between the fixing part (13) and the end face of the claw (3) is 0.03-0.06 mm.

7. The floating jaw fixture for ring machining according to claim 2, characterized in that, The first and second stops are arranged in a V-shape. Both the first and second stops are provided with threaded holes, which are used to abut the left and right sides of the claw (3) through screws (16).

8. The floating jaw fixture for ring machining according to claim 2, characterized in that, The gap between the first and second stops and the planes on the left and right sides of the claw (3) is 0.2-0.3mm.

9. The floating jaw fixture for ring machining according to claim 1, characterized in that, The claw is provided with a support arm (7) for abutting the inner circle of the ring, and the end face of the support arm (7) for contacting the inner circle of the ring (6) has the same curvature as the ring (6).

10. The floating jaw fixture for ring machining according to claim 9, characterized in that, The end face of the support arm (7) that contacts the inner circle of the ring (6) has several discontinuous grooves (14).

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