Anti-deformation composite clamp for hard turning of thin-walled workpiece
By designing a composite clamp that combines grippers and rubber expansion sleeves, stable clamping of thin-walled parts is achieved without deformation, solving the problem of damage to thin-walled parts caused by traditional clamps and providing anti-deformation effect.
Patent Information
- Application Number
- CN202520663808.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-09
AI Technical Summary
Traditional machine tool fixtures are prone to deformation when clamping thin-walled parts, especially when machining ring-shaped thin-walled parts, where excessive clamping force can damage the thin-walled parts.
A composite clamp for preventing deformation of thin-walled parts is adopted. The combination structure of the jaws and the rubber expansion sleeve limits the thin-walled parts in the axial and radial directions, and the clamping force is reduced by the elastic component to avoid deformation.
While clamping thin-walled parts, deformation is effectively avoided, ensuring stability and integrity during the processing.
Smart Images
Figure CN223947387U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of machine tool, especially a thin -walled piece hard -turning anti -deformation composite clamp. BACKGROUND
[0002] Machine tool fixture is a device for clamping tools on machine tool, and the traditional machine tool fixture mainly relies on rubber expansion sleeve to form a holding force by inward extrusion to clamp the thin-walled part. Since the clamping force is mainly relied on the inward clamping force, the clamping force is very large. If the thin-walled part is solid structure, the clamping force will not cause the deformation of the thin-walled part under the support of thick wall thickness. However, in the actual machining process, the annular thin-walled part (i.e. thin-walled part) is often machined, and when the thin-walled part is clamped on the outer surface by the strong clamping force, the thin-walled part is easily deformed due to its thin wall thickness, resulting in damage to the thin-walled part. SUMMARY
[0003] The utility model wants to solve the prior art problem provides a thin -walled piece hard -turning anti -deformation composite clamp, it can avoid the deformation of thin -walled part when limiting the concentricity of thin -walled part, play the effect of preventing deformation.
[0004] The utility model adopts the technical scheme that the above technical problem is solved as follows:
[0005] The utility model discloses a thin-walled part hard-turning anti-deformation composite clamp, including the fixture main part, a plurality of the clamping jaw that is evenly distributed in the right side of fixture main part, the fixture main part left end face center is equipped with a movable slot, the fixture main part left end face is equipped with the seat board that is attached to it, the seat board center is equipped with a guide hole with movable slot same axis, and the guide hole diameter is less than movable slot diameter, the seat board left side wall is equipped with the limit sleeve with guide hole same axis, be equipped with the sliding seat that is matched with it in the guide hole, the sliding seat left end face center is equipped with a connecting shaft, and the connecting shaft passes through the limit sleeve inner hole to left, the sliding seat right end is equipped with a push board in movable slot, the fixture main part right end face center is equipped with a embedding groove, the embedding groove is equipped with the clamping structure that is matched with it, the fixture main part right end face is equipped with a plurality of telescopic hole with clamping jaw position corresponding, and the telescopic hole left end is connected with movable slot, be equipped with the telescopic axle that is matched with it in the telescopic hole, and the clamping jaw is established at the telescopic axle right end, the telescopic axle left end is equipped with the limit block with movable slot position corresponding, the limit block one side is equipped with the guide slot with push board matched, the clamping structure includes the rubber expansion sleeve that is equipped in embedding groove, the rubber expansion sleeve right end inner wall is equipped with a plurality of limit steps that are evenly distributed in the circumference, the limit step right side step surface is equipped with the clamping piece that is matched with it, and the clamping piece has elasticity.
[0006] The clamping structure further comprises an inner taper surface provided on the inner wall of the slot opening, the inner taper surface being left-narrow right-wide; the outer wall of the right end of the rubber sleeve is provided with an outer taper surface which is left-narrow right-wide and which is in close contact with the inner taper surface; the rubber sleeve is internally provided with a backrest which is matched therewith, the right end surface of the backrest being provided with a groove in the center thereof; the outer wall of the rubber sleeve is provided with a plurality of movable openings which are in communication with the internal space thereof; the outer wall of the backrest is provided with a plurality of positioning holes which are in correspondence with the positions of the movable openings; the outer wall of the clamp main body is provided with a plurality of screw holes which are in communication with the movable openings; the screw holes are internally screwed with positioning screws which are matched therewith, the end portions of the positioning screws penetrating through the movable openings and being located in the positioning holes; the left end surface of the rubber sleeve is provided with a plurality of sliding holes which are in communication with the internal space thereof; the bottom of the slot is provided with a plurality of guide columns which are matched with the sliding holes; the guide columns and the backrest are fixed by a plurality of fixing screws.
[0007] The left end surface of the rubber sleeve is provided with a plurality of auxiliary holes which are in communication with the internal space thereof; the left end surface of the backrest is provided with a plurality of limiting holes which are coaxial with the auxiliary holes; the bottom of the slot is provided with a plurality of jacks which are coaxial with the auxiliary holes; the right end of the jack penetrates through the auxiliary hole and penetrates into the limiting hole.
[0008] The bottom of the movable slot is provided with a first moving hole in the center thereof; the bottom of the slot is provided with a second moving hole which is in communication with the first moving hole; the diameter of the second moving hole is larger than that of the first moving hole; the second moving hole is internally provided with a second moving block which is matched therewith, the second moving block and the rubber sleeve being fixed by a plurality of fastening screws; the left end surface of the second moving block is provided with a first moving block in the center thereof; the right end surface of the sliding seat is provided with a receiving hole in the center thereof; the left end surface of the first moving block is provided with a center shaft in the center thereof; the left end of the center shaft penetrates into the receiving hole and is screwed with a limiting nut; the left annular gasket is provided on the outer surface of the center shaft; the right annular gasket is provided on the outer surface of the center shaft; the clamping spring is provided on the outer surface of the center shaft between the left annular gasket and the right annular gasket.
[0009] One side of the guide hole is provided with a limiting sliding groove in the inner wall thereof; the outer circumferential surface of the sliding seat is provided with a key groove which is opposite to the limiting sliding groove; the key groove is internally provided with a limiting key which is matched therewith; the outer end of the limiting key protrudes into the limiting sliding groove; the outer circumferential surface of the pushing plate is provided with a plurality of pushing portions which are matched with the guide grooves; the outer edge of the pushing portion has a sliding arc surface; the guide groove has a guide arc surface which is matched with the sliding arc surface; the guide arc surface is a spiral surface in the middle portion thereof.
[0010] The right end surface of the backrest and the left side wall of the clamping jaw are clamped with a thin-walled member; the clamping member has an elastic portion which is pressed on the outer circumferential surface of the thin-walled member.
[0011] The side wall opposite to the thin-walled piece of the clamping piece is provided with an elastic notch, and an elastic part is located in the middle of the elastic notch; the elastic part and the inner wall on both sides of the elastic notch are connected through a connecting plate; and the end of the connecting plate away from the elastic part is inclined outward.
[0012] The inner wall of the elastic notch, the connecting plate and the elastic part enclose an elastic cavity, and an elastic block matched with the elastic cavity is arranged in the elastic cavity.
[0013] The elastic block is made of high-strength elastic material.
[0014] The clamping piece is provided with a plurality of limiting counterbores, the limiting steps are provided with limiting screw holes corresponding to the positions of the limiting counterbores, and a limiting screw passes through the limiting counterbores and is screwed into the limiting screw holes corresponding thereto.
[0015] The thin-walled piece hard turning anti-deformation composite clamp has the advantages that:
[0016] Compared with the prior art, the thin-walled piece hard turning anti-deformation composite clamp has the advantages that: BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 is a sectional view of the thin-walled piece hard turning anti-deformation composite clamp of the utility model from one angle;
[0018] Figure 2 is a structural schematic view of a part of the thin-walled piece hard turning anti-deformation composite clamp of the utility model;
[0019] Figure 3 is a structural schematic view of a pushing plate;
[0020] Figure 4 is a structural schematic view of a telescopic shaft;
[0021] Figure 5 is a perspective view of the thin-walled piece hard turning anti-deformation composite clamp of the utility model;
[0022] Figure 6 is a sectional view of the thin-walled piece hard turning anti-deformation composite clamp of the utility model from another angle;
[0023] Figure 7is a structure schematic view of the rubber expansion sleeve inner wall equipped with the clamping piece;
[0024] Figure 8 is a structure schematic view of the clamping piece. DETAILED DESCRIPTION
[0025] The utility model will be further explained in detail in connection with the drawings and specific embodiments:
[0026] Please refer to Figures 1 to 8 The utility model provides a thin -walled piece hard -turning anti -deformation composite clamp, including clamp main part 1, a plurality of evenly distributed clamping jaw 2 in the circumference right side of clamp main part 1, the left end surface center of clamp main part 1 is equipped with a movable slot 3;The left end surface of clamp main part 1 is equipped with the seat plate 4 that sticks to it;The center of seat plate 4 is equipped with a guide hole 5 with movable slot 3 coaxial, and the diameter of guide hole 5 is less than the diameter of movable slot 3;The left side wall of seat plate 4 is equipped with the limit sleeve 6 with guide hole 5 coaxial;The guide hole 5 is equipped with the sliding seat 7 that matches it;The left end surface center of sliding seat 7 is equipped with a connecting shaft 8, and connecting shaft 8 passes through the inner hole of limit sleeve 6 leftwards;The right end of sliding seat 7 is equipped with a push plate 9 in movable slot 3;The right end surface center of clamp main part 1 is equipped with an embedding groove 10;The embedding groove 10 is equipped with the clamping structure that matches it;The right end surface of clamp main part 1 is equipped with a plurality of telescopic holes 11 with the position corresponding to clamping jaw 2, and the left end of telescopic hole 11 is in communication with movable slot 3;The telescopic hole 11 is equipped with the telescopic shaft 12 that matches it, and clamping jaw 2 is equipped at the right end of telescopic shaft 12;The left end of telescopic shaft 12 is equipped with the limit block 13 with the position corresponding to movable slot 3;One side of limit block 13 is equipped with the guide slot 14 matched with push plate 9;The clamping structure includes the rubber expansion sleeve 15 in embedding groove 10;The right end inner wall of rubber expansion sleeve 15 is equipped with a plurality of limit steps 48 evenly distributed in the circumference;The right side step surface of limit step 48 is equipped with the clamping piece 49 that matches it;The clamping piece 49 has elasticity.
[0027] The clamping structure further comprises an inner taper surface 16 provided on the inner wall of the slot opening of the embedding slot 10, which is left-narrow and right-wide; the right end of the outer wall of the rubber sleeve 15 is provided with an outer taper surface 17 which is left-narrow and right-wide, and the outer taper surface 17 is in close contact with the inner taper surface 16; the rubber sleeve 15 is internally provided with a backrest 18 which is matched with the rubber sleeve 15, and the right end surface of the backrest 18 is provided with a groove 19; the outer wall of the rubber sleeve 15 is provided with a plurality of movable openings 20 which are in communication with the internal space of the rubber sleeve 15; the outer wall of the backrest 18 is provided with a plurality of positioning holes 21 which are in correspondence with the positions of the movable openings 20; the outer wall of the clamp body 1 is provided with a plurality of screw holes 22 which are in communication with the movable openings 20; the screw holes 22 are internally screwed with positioning screws 23 which are matched with the screw holes 22, and the end of the positioning screws 23 penetrates through the movable openings 20 and is located in the positioning holes 21; the left end surface of the rubber sleeve 15 is provided with a plurality of sliding holes 24 which are in communication with the internal space of the rubber sleeve 15; the bottom of the embedding slot 10 is provided with a plurality of guide columns 25 which are matched with the sliding holes 24; the guide columns 25 and the backrest 18 are fixed by a plurality of fixing screws 26.
[0028] The left end surface of the rubber sleeve 15 is provided with a plurality of auxiliary holes 27 which are in communication with the internal space of the rubber sleeve 15; the left end surface of the backrest 18 is provided with a plurality of limiting holes 28 which are coaxial with the auxiliary holes 27; the bottom of the embedding slot 10 is provided with a plurality of jacks 29 which are coaxial with the auxiliary holes 27; the right end of the jacks 29 penetrates through the auxiliary holes 27 and penetrates into the limiting holes 28.
[0029] The bottom of the movable slot 3 is provided with a first moving hole 30 at the center; the bottom of the embedding slot 10 is provided with a second moving hole 31 which is in communication with the first moving hole 30; the diameter of the second moving hole 31 is larger than that of the first moving hole 30; the second moving hole 31 is internally provided with a second moving block 32 which is matched with the second moving hole 31, and the second moving block 32 and the rubber sleeve 15 are fixed by a plurality of fastening screws 33; the left end surface of the second moving block 32 is provided with a first moving block 34 at the center; the right end surface of the sliding seat 7 is provided with a receiving hole 35 at the center; the left end surface of the first moving block 34 is provided with a center shaft 36 at the center; the left end of the center shaft 36 penetrates into the receiving hole 35 and is screwed with a limiting nut 37; the right side of the limiting nut 37 is provided with a left annular gasket 38 which is sleeved on the outer wall of the center shaft 36; the bottom of the movable slot 3 is provided with a right annular gasket 39 which is sleeved on the outer wall of the center shaft 36; the left annular gasket 38 and the right annular gasket 39 are provided with a clamping spring 40 which is sleeved on the outer wall of the center shaft 36.
[0030] The inner wall of one side of the guide hole 5 is provided with a limiting sliding groove 41; the outer circumferential surface of the sliding seat 7 is provided with a key groove 42 opposite to the limiting sliding groove 41; the key groove 42 is provided with a limiting key 43 matched with the key groove 42; the outer end of the limiting key 43 protrudes into the limiting sliding groove 41; the outer circumferential surface of the pushing plate 9 is provided with a plurality of pushing parts 44 matched with the guide groove 14; the outer edge of the pushing part 44 has a sliding arc surface 45; the guide groove 14 has a guide arc surface 46 matched with the sliding arc surface 45; the middle part of the guide arc surface 46 is a spiral surface 4601.
[0031] The thin-wall part 47 is clamped between the right end surface of the backer 18 and the left side wall of the clamping jaw 2; the clamping part 49 has an elastic part 50, and the elastic part 50 is pressed on the outer circumferential surface of the thin-wall part 47.
[0032] The side wall opposite to the thin-wall part 47 of the clamping part 49 has an elastic notch 51, and the elastic part 50 is located in the middle part of the elastic notch 51; the elastic part 50 and the inner walls on both sides of the elastic notch 51 are connected through a connecting plate 52; one end of the connecting plate 52 away from the elastic part 50 is inclined outward.
[0033] The inner wall of the elastic notch 51, the connecting plate 52 and the elastic part 50 form an elastic cavity 53; the elastic cavity 53 is provided with an elastic block matched with the elastic cavity 53.
[0034] The elastic block is made of high-strength elastic material.
[0035] The clamping part 49 is provided with a plurality of limiting counterbores 54; the limiting step 48 is provided with limiting screw holes 55 corresponding in position to the limiting counterbores 54; a limiting screw 56 passes through the limiting counterbores 54 and is screwed into the limiting screw holes 55 corresponding thereto.
[0036] The use method of the utility model is as follows:
[0037] The left end of the connecting shaft 8 can be connected with the piston rod of the hydraulic cylinder. When it is needed to take out the processed thin-walled part from the chuck, the hydraulic cylinder can be started to drive the piston rod of the hydraulic cylinder to move the connecting shaft 8 to the right, so as to realize the right movement of the sliding seat 7. When the sliding seat 7 moves to the right, the pushing plate 9 moves to the right synchronously, and the pushing parts 44 on the outer edge of the pushing plate 9 are clamped in the guide groove 14. When the pushing parts 44 move to the right, the sliding arc surfaces 45 on the outer edge of the pushing parts 44 will rub against the guide arc surfaces 46, so that the limiting blocks 13 are pushed to the right under the action of the friction force, thereby realizing the right movement of the telescopic shaft 12. When the telescopic shaft 12 moves to the right, the clamping jaws 2 move to the right away from the end face of the rubber expansion sleeve 15. The middle part of the guide arc surface 46 is provided with a spiral surface 4601. When the pushing parts 44 move axially, the sliding arc surfaces 45 will extrude the spiral surface 4601 as the sliding arc surfaces 45 come into contact with the spiral surface 4601, so that the limiting blocks 13 and the telescopic shaft 12 rotate along the spiral track of the spiral surface 4601, so that the clamping jaws 2 rotate while moving to the right. The clamping jaws 2 originally blocked on the right side of the right end port of the rubber expansion sleeve 15 move out of the range of the right end port of the rubber expansion sleeve 15, so that the right end port of the rubber expansion sleeve 15 no longer exists any obstruction. After the limiting blocks 13 move to the right for a certain stroke, the limiting blocks 13 will come into contact with the groove bottom of the movable groove 3. At this time, the groove bottom of the movable groove 3 can effectively limit the stroke of the right movement of the clamping jaws 2, so as to avoid that the stroke of the right movement of the clamping jaws 2 is too large.
[0038] When the connecting shaft 8 and the sliding seat 7 move to the right for a certain stroke, the accommodating hole 35 hole bottom will push the limiting nut 37 to the right, and the clamping spring 40 is compressed and generates elastic force. At this time, the central shaft 36 moves to the right synchronously. When the central shaft 36 moves to the right, the central shaft 36 drives the rubber expansion sleeve 15 to move to the right through the first moving block 34 and the second moving block 32. When the rubber expansion sleeve 15 moves to the right, the inner tapered surface 16 of the inner wall of the slot 10 right end slot no longer extrudes the outer tapered surface 17. At this time, the right end port of the rubber expansion sleeve 15 is expanded outward under the action of the rubber elastic force, and the thin-walled part can be easily taken out from the right end port of the rubber expansion sleeve 15. In the case that there is no any obstruction in the right end port of the rubber expansion sleeve 15, the thin-walled part can be quickly disassembled, and then a new thin-walled part can be placed into the right end port of the rubber expansion sleeve 15.
[0039] When the new thin-walled part is put into the rubber expansion sleeve 15, the left end face of the thin-walled part is in contact with the right end face of the backstop 18, and then the connecting shaft 8 is pulled to the left by the hydraulic cylinder. When the connecting shaft 8 drives the sliding seat 7 to move to the left, the bottom of the accommodating hole 35 no longer pushes the limiting nut 37 to the left, and at this time the center shaft 36 is reset to the left under the elastic force of the clamping spring 40, thereby realizing the left reset of the rubber expansion sleeve 15. Since the inner tapered surface 16 and the outer tapered surface 17 are both left narrow and right wide, when the rubber expansion sleeve 15 moves to the left, the inner tapered surface 16 will press the outer tapered surface 17 inward, so that the rubber expansion sleeve 15 is folded, and the circumferentially uniformly distributed clamping part 49 is folded to tightly hold the thin-walled part 47. When the connecting shaft 8 drives the sliding seat 7 to move to the left, the pushing part 44 on the pushing plate 9 moves to the left synchronously. With the contact between the sliding arc surface 45 on the outer edge of the pushing part 44 and the guide arc surface 46 and the helical surface 4601, the telescopic shaft 12 drives the clamping jaw 2 to rotate and move to the left at the same time, and finally the clamping jaw 2 is again on the right side of the right end port of the rubber expansion sleeve 15, and the end of the clamping jaw 2 is pressed on the right end face of the thin-walled part 47. At this time, the thin-walled part 47 is clamped between the right end face of the backstop 18 and the left side wall of the end of the clamping jaw 2, and the outer circumferential surface of the thin-walled part 47 is tightly held by the elastic part 50 of the clamping part 49, thereby ensuring the stability of the thin-walled part 47 after the feeding is completed.
[0040] Therefore, by moving the connecting shaft 8 to drive the sliding seat 7 to move to the right by a certain stroke, the telescopic shaft 12 can drive the clamping jaw 2 to rotate and move to the right at the same time, and the stroke of the clamping jaw 2 moving to the right can be limited by the blocking of the limiting block 13 by the groove bottom of the movable groove 3, so that the clamping jaw 2 only moves a short stroke. Therefore, even if the clamping jaw 2 does not clamp the thin-walled part, the gap between the clamping jaw 2 and the right end face of the rubber expansion sleeve 15 is extremely small, and the hands of the worker cannot be inserted into the gap, thereby realizing normal feeding and discharging of the thin-walled part 47 while avoiding the situation of hand clamping and hand pressing when the worker feeds and discharges.
[0041] When the elastic part 50 of the clamping part 49 clamps the outer circumferential surface of the thin-walled part, since the elastic part 50 has elasticity, it can effectively reduce the clamping force actually applied to the outer wall of the thin-walled part 47 by the elastic part 50, thereby effectively avoiding the situation that the pressure applied to the outer wall of the thin-walled part 47 is too large to cause the thin-walled part 47 to deform while the clamping part 49 clamps the outer wall of the thin-walled part 47 by the elastic part 50, thereby achieving the effect of preventing deformation.
[0042] The clamping spring 40 is sleeved outside the center shaft 36 between the left annular gasket 38 and the right annular gasket 39. The existence of the left annular gasket 38 and the right annular gasket 39 can effectively increase the contact area of the left and right ends of the clamping spring 40, thereby ensuring the stability of the clamping spring 40 when it is compressed to generate elastic force.
[0043] The left end face of the rubber expansion sleeve 15 is provided with a plurality of sliding holes 24 penetrating the internal space thereof, the groove bottom of the embedding groove 10 is provided with a plurality of guide columns 25 matched with the sliding holes 24, the presence of the guide columns 25 can play a guiding role when the rubber expansion sleeve 15 moves, ensuring the stability of the rubber expansion sleeve 15 when moving, and the width of the movable port 20 is greater than the diameter of the positioning screw 23, so that even if the positioning screw 23 passes through the movable port 20, the rubber expansion sleeve 15 can still move axially through the movable port 20.
[0044] The left end face of the rubber expansion sleeve 15 is provided with a plurality of auxiliary holes 27 penetrating the internal space thereof, the left end face of the abutment 18 is provided with a plurality of limiting holes 28 coaxial with the auxiliary holes 27, and the groove bottom of the embedding groove 10 is provided with a plurality of jacks 29 coaxial with the auxiliary holes 27. The right end of the jack 29 penetrates the auxiliary hole 27 to the right and penetrates into the limiting hole 28, and the presence of the jack 29 can play an auxiliary guiding effect when the rubber expansion sleeve 15 moves, further ensuring the stability of the rubber expansion sleeve 15 when moving.
[0045] The limiting sliding groove 41 is arranged on one side of the inner wall of the guide hole 5, the key groove 42 is arranged on the outer circumferential surface of the sliding seat 7, the limiting key 43 is arranged in the key groove 42, the outer end of the limiting key 43 protrudes into the limiting sliding groove 41, and the presence of the limiting key 43 can ensure that the sliding seat 7 does not rotate when moving left and right, so that the pushing plate 9 does not rotate when moving left and right, ensuring that the pushing part 44 of the pushing plate 9 always moves in the guide groove 14, and ensuring the stability of the moving and rotating of the clamping jaw 2.
[0046] The fixture body 1 and the seat plate 4 are fixed by a plurality of screws, and the seat plate 4 and the limiting sleeve 6 are fixed by a plurality of screws. This fixing mode not only can ensure the stability between the fixture body 1 and the seat plate 4, and between the seat plate 4 and the limiting sleeve 6, but also is convenient to disassemble.
[0047] The side wall opposite to the thin-walled part 47 of the clamping part 49 has an elastic notch 51, the elastic part 50 is located in the middle of the elastic notch 51, the elastic part 50 and the inner walls on both sides of the elastic notch 51 are connected by a connecting plate 52, and the end of the connecting plate 52 away from the elastic part 50 is inclined outward. The presence of the elastic notch 51 enables the elastic part to deform to a certain extent when clamping the outer circumferential surface of the thin-walled part 47, thereby generating elastic force and weakening the clamping force. At the same time, the inclined arrangement of the connecting plate 52 enables only the elastic part 50 to press on the outer circumferential surface of the thin-walled part 47, effectively reducing the contact area between the clamping part 49 and the thin-walled part 47, and further avoiding the situation that the clamping force applied by the clamping part 49 to the outer circumferential surface of the thin-walled part 47 is too large to cause deformation of the thin-walled part 47.
[0048] The inner wall of the elastic gap 51, the connecting plate 52 and the elastic part 50 form an elastic cavity 53, and a matched elastic block is arranged in the elastic cavity 53. The elastic block can control the clamping pressure of the elastic part 50 through its elasticity. When the material of the elastic block is a high-strength elastic material, the elastic force generated by the high-strength elastic material can be converted into the clamping force of the elastic part 50. Thus, the clamping force of the elastic part 50 is controlled to a small pressure actually required through the high-strength elastic material, so that the clamping force of the clamping part 49 is prevented from being too large to the greatest extent.
[0049] A plurality of limiting counterbores 54 are arranged on the clamping part 49, and a plurality of limiting screw holes 55 corresponding to the positions of the limiting counterbores 54 are arranged on the limiting step 48. A limiting screw 56 passes through the limiting counterbores 54 and is screwed into the limiting screw holes 55 corresponding thereto. This fixing mode facilitates the disassembly between the clamping part 49 and the limiting step 48, and is beneficial to the maintenance and replacement of the clamping part 49.
Claims
1. A thin-walled workpiece hard turning anti-deformation composite fixture, comprising a fixture body and a plurality of clamping jaws uniformly distributed on the right side of the fixture body, characterized in that: The left end face of the clamp body is provided with a movable slot; the left end face of the clamp body is provided with a seat plate attached thereto; the center of the seat plate is provided with a guide hole coaxial with the movable slot, and the diameter of the guide hole is smaller than that of the movable slot; the left side wall of the seat plate is provided with a limiting sleeve coaxial with the guide hole; the guide hole is provided with a sliding seat matched therewith; the center of the left end face of the sliding seat is provided with a connecting shaft, which passes through the limiting sleeve hole to the left; the right end of the sliding seat is provided with a push plate located in the movable slot; the right end face of the clamp body is provided with an embedding slot; the embedding slot is provided with a clamping structure matched therewith; the right end face of the clamp body is provided with a plurality of telescopic holes corresponding to the positions of the clamping jaws, and the left end of the telescopic hole is connected with the movable slot; the telescopic hole is provided with a telescopic shaft matched therewith, and the clamping jaw is arranged at the right end of the telescopic shaft; the left end of the telescopic shaft is provided with a limiting block corresponding to the position of the movable slot; one side of the limiting block is provided with a guide groove matched with the push plate; the clamping structure comprises a rubber expansion sleeve arranged in the embedding slot; the right end inner wall of the rubber expansion sleeve is provided with a plurality of limiting steps uniformly distributed in a circle; the right side step surface of the limiting step is provided with a clamping piece matched therewith; the clamping piece has elasticity.
2. The hard turning anti-deformation composite fixture for thin-walled parts according to claim 1, characterized in that: The clamping structure further comprises an inner taper surface arranged on the inner wall of the embedding slot, and the inner taper surface is left narrow and right wide; the right end outer wall of the rubber expansion sleeve is provided with an outer taper surface which is left narrow and right wide, and the outer taper surface is attached to the inner taper surface; the rubber expansion sleeve is provided with a backrest matched therewith; the right end surface of the backrest is provided with a groove; the outer wall of the rubber expansion sleeve is provided with a plurality of movable openings connected with the inner space thereof; the outer wall of the backrest is provided with a plurality of positioning holes corresponding to the positions of the movable openings; the outer wall of the clamp body is provided with a plurality of screw holes connected with the movable openings; the screw holes are screwed with positioning screws matched therewith, and the end portions of the positioning screws pass through the movable openings and are located in the positioning holes; the left end face of the rubber expansion sleeve is provided with a plurality of sliding holes connected with the inner space thereof; the bottom of the embedding slot is provided with a plurality of guide columns matched with the sliding holes; the guide columns and the backrest are fixed by a plurality of fixing screws.
3. The hard turning anti-deformation composite fixture for thin-walled parts according to claim 2, characterized in that: The left end face of the rubber expansion sleeve is provided with a plurality of auxiliary holes connected with the inner space thereof; the left end face of the backrest is provided with a plurality of limiting holes coaxial with the auxiliary holes; the bottom of the embedding slot is provided with a plurality of jacks coaxial with the auxiliary holes; the right end of the jack passes through the auxiliary hole to the right and penetrates into the limiting hole.
4. The hard-broaching anti-deformation composite fixture for thin-walled parts according to claim 2, characterized in that: The center of the bottom of the movable slot is provided with a first moving hole; the center of the bottom of the embedded slot is provided with a second moving hole which is in communication with the first moving hole; the diameter of the second moving hole is larger than that of the first moving hole; a second moving block which is matched with the second moving hole is arranged in the second moving hole; the second moving block and the rubber expansion sleeve are fixed by a plurality of fastening screws; the left end surface of the second moving block is provided with a first moving block; the right end surface of the sliding seat is provided with a containing hole; the left end of the central shaft is inserted into the containing hole and is screwed with a limiting nut; the right side of the limiting nut is provided with a left annular gasket which is sleeved on the outer surface of the central shaft; the bottom of the movable slot is provided with a right annular gasket which is sleeved on the outer surface of the central shaft; the left annular gasket and the right annular gasket are provided with clamping springs which are sleeved on the outer surface of the central shaft.
5. The hard-broaching anti-deformation composite fixture for thin-walled parts according to claim 1, characterized in that: The inner wall of one side of the guide hole is provided with a limiting sliding groove; the outer peripheral surface of the sliding seat is provided with a key groove which is opposite to the limiting sliding groove; the key groove is provided with a limiting key which is matched with the key groove; the outer end of the limiting key protrudes into the limiting sliding groove; the outer peripheral surface of the pushing plate is provided with a plurality of pushing parts which are matched with the guide groove; the outer edge of the pushing part has a sliding arc surface; the guide groove has a guide arc surface which is matched with the sliding arc surface; the guide arc surface is a spiral surface in the middle part.
6. The hard-broaching anti-deformation composite fixture for thin-walled parts according to claim 2, characterized in that: The right end surface of the abutment and the left side wall of the clamping jaw are clamped with a thin-walled part; the clamping part has an elastic part which is pressed on the outer peripheral surface of the thin-walled part.
7. The hard-broaching anti-deformation composite fixture for thin-walled parts according to claim 6, characterized in that: The side wall opposite to the clamping part and the thin-walled part has an elastic notch, and the elastic part is located in the middle part of the elastic notch; the elastic part and the inner walls on both sides of the elastic notch are connected by a connecting plate; the end of the connecting plate away from the elastic part is inclined outward.
8. The hard-broaching anti-deformation composite fixture for thin-walled parts according to claim 7, characterized in that: The inner walls of the elastic notch, the connecting plate and the elastic part form an elastic cavity; The elastic cavity is provided with an elastic block which is matched with the elastic cavity.
9. The hard-broaching anti-deformation composite fixture for thin-walled parts according to claim 8, characterized in that: The material of the elastic block is high-strength elastic material.
10. The hard-broaching anti-deformation composite fixture for thin-walled parts according to claim 8, characterized in that: A plurality of limiting counterbores are arranged on the clamping part; the limiting steps are provided with limiting screw holes which are corresponding to the positions of the limiting counterbores; a limiting screw passes through the limiting counterbores and is screwed into the limiting screw holes which are corresponding thereto.