Annular part inner hole machining fixing clamp

Abstract

The invention relates to the technical field of machining, and discloses a ring part inner hole machining fixing clamp which comprises a fixing ring, a driving assembly used for driving is installed in the middle of the fixing ring, a clamping mechanism used for clamping a part is installed between the driving assembly and the fixing ring, and the driving assembly comprises a rotating ring. The rotating ring is rotationally connected to the inner side of the fixed ring, the outer side of the rotating ring is fixedly connected with a pull rod, and the other end of the pull rod is rotationally connected with a clamping force adjusting assembly. The clamping force adjusting assembly drives linkage of the rotating ring and the rotating rod, the clamping plates can automatically get close to workpieces, tight attaching clamping of the workpieces of different sizes is achieved through deformation of the clamping plates and elastic force provided by the elastic pieces, and therefore the clamping efficiency and adaptability are greatly improved, meanwhile, the extending length of an extending plate is finely adjusted through an adjusting bolt, and the clamping efficiency is improved. The positions of the clamping plates can be accurately adjusted, and clamping errors are eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to a fixing fixture for processing inner holes of ring-type parts. Background Art

[0002] In the field of mechanical processing, inner hole processing of ring parts (such as flanges, gear rings, bearing sleeves, etc.) is a common and important process. In order to ensure the accuracy and efficiency of inner hole processing, the design and application of fixed fixtures are particularly critical. At present, the commonly used fixed fixtures on the market are mainly three-jaw chucks. The three-jaw chuck relies on three points to evenly clamp the workpiece. It has the advantages of simple structure and strong versatility, so it is widely used in various horizontal lathes. However, the three-jaw chuck also has certain limitations when processing the inner holes of ring parts.

[0003] Because it is clamped at points, when the jaws are clamped too tightly, the pressure at the point contact with the outer wall is relatively high, which can easily damage the outer wall of the part. For thin-walled or large-diameter ring parts, excessive clamping force can easily cause deformation of the workpiece, thus affecting the processing accuracy. If the clamping is too loose, the installation will be unstable, affecting the subsequent inner hole processing operations. Secondly, the three-jaw chuck uses an adjustment component to adjust the synchronous movement of multiple jaws, which to a certain extent improves the centering operation of ring parts. However, in actual application, due to the surface shape and defects of the ring parts, some jaws of the three-jaw chuck cannot fully contact the surface of the ring parts, which further affects the stability of the clamping. At this time, it is necessary to use additional auxiliary fixtures to avoid this problem, which invisibly increases the processing cost and operation complexity.

[0004] Therefore, in order to solve these problems in the inner hole processing of ring parts, it is particularly important to develop an efficient fixing fixture specifically suitable for horizontal lathes. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a fixing fixture for machining inner holes of ring-like parts, which solves the problem that the existing three-jaw chuck is prone to cause workpiece deformation and positioning deviation during the machining of inner holes of ring-like parts.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a fixing fixture for inner hole processing of ring-type parts, including a fixing ring, a driving component for driving is installed in the middle of the fixing ring, and a clamping mechanism for clamping the parts is installed between the driving component and the fixing ring.

[0007] Preferably, the driving assembly includes a rotating ring, which is rotatably connected to the inner side of the fixed ring, and a pull rod is fixedly connected to the outer side of the rotating ring. A clamping force adjustment assembly is installed at the other end of the pull rod, and the other end of the clamping force adjustment assembly is installed at the outer side of the fixed ring.

[0008] Preferably, the clamping force adjustment assembly includes a sleeve, a threaded rod and a threaded ring, the sleeve is rotatably connected to the outside of the fixing ring, the threaded rod is rotatably connected to the middle of the sleeve, the threaded ring is threadedly connected to the outer periphery of the threaded rod, and the threaded ring is rotatably connected to the bottom of the pull rod.

[0009] Preferably, the clamping mechanism includes a rotating rod, which rotates in the middle of the rotating ring, a positioning pin is fixedly connected to the middle of the fixed ring, a positioning groove is opened in the middle of the rotating rod, and the positioning pin is located in the middle of the positioning groove. An extension plate is installed at one end of the rotating rod away from the positioning pin through an adjusting component, and a clamp is rotatably connected to the top of the extension plate.

[0010] Preferably, a torsion spring is sleeved on the bottom of the clamping plate, one end of the torsion spring is fixed to the bottom of the extension plate, and the other end is fixed to the bottom of the clamping plate.

[0011] Preferably, the adjustment assembly includes an adjustment bolt, one end of which is rotatably connected to the outside of the rotating rod, and the other end of the adjustment bolt passes through and is threadedly connected to the outer side of the extension plate.

[0012] Preferably, a groove is formed at the top of each of the fixed ring and the rotating ring, a reset spring is installed inside the groove, one end of the reset spring is connected to the fixed ring, and the other end is connected to the rotating ring.

[0013] Preferably, the clamping plate is made of spring steel material, and a side of the clamping plate close to the part is roughened.

[0014] Preferably, a spring piece is fixedly connected to the notch on the outer side of the splint.

[0015] Preferably, the side walls of the fixed ring and the rotating ring are both provided with through-going notches, and the rotating rod is placed in the notches.

[0016] Working principle: First, install the fixed fixture on the horizontal lathe. When performing internal control processing of ring parts, place the parts between multiple clamps, and then drive the clamping force adjustment component to drive the rotating ring to rotate. At this time, the rotating rod is deflected by the movement of the positioning pin to drive the clamp to approach the workpiece. After the clamp and the workpiece are in contact, the workpiece can be clamped. When the clamp contacts the workpiece, the edge of the clamp first contacts the outer surface of the workpiece, and then under the continuous action of the clamping force adjustment component, the clamp is squeezed, so that the concave surface inside the clamp contacts the outer surface of the workpiece, and the two ends of the clamp are also squeezed and deformed. At this time, the clamp can be completely fitted with the outer surface of the workpiece, and the spring sheet outside the clamp provides elastic force for the clamp, so that the clamp can be deformed, so that workpieces of different sizes can be fully clamped.

[0017] During the clamping process, if there is an error in the distance between one or more of the clamping plates and the workpiece, the length of the extension plate extending beyond the rotating rod can be adjusted by turning the adjusting bolt, thereby fine-tuning the position of the clamping plate to achieve full clamping of the workpiece.

[0018] The bottom of the clamp is connected to the extension plate by a torsion spring. When the clamp is separated from the workpiece, the clamp is automatically reset to avoid excessive rotation of the clamp on the upper part of the extension plate, so as to achieve the positioning of the clamp. At the same time, the reset clamp is convenient for subsequent clamping operations.

[0019] The present invention provides a fixing fixture for machining inner holes of ring parts. It has the following beneficial effects: 1. The present invention drives the rotating ring and the rotating rod to work in conjunction through the clamping force adjustment component, so that the clamping plate can automatically approach the workpiece, and through the deformation of the clamping plate and the elastic force provided by the spring sheet, it can achieve close fitting clamping of workpieces of different sizes, thereby greatly improving the clamping efficiency and adaptability, and solving the problem of parts damage caused by the three-jaw chuck during the clamping process, thereby further ensuring the accuracy of inner hole processing of ring parts.

[0020] 2. The present invention can achieve precise adjustment of the position of the clamping plate and eliminate clamping errors by fine-tuning the extension length of the extension plate by adjusting the bolt; at the same time, the torsion spring at the bottom of the clamping plate can achieve automatic reset to avoid excessive rotation of the clamping plate, thereby ensuring clamping accuracy and facilitating subsequent operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A perspective view of the present invention; Figure 2 is a schematic diagram of a rotating ring in the present invention; Figure 3 It is a schematic diagram of the structure of the fixing ring in the present invention; Figure 4 It is a structural schematic diagram of the clamping mechanism in the present invention; Figure 5 It is a cross-sectional exploded schematic diagram of the fixing ring in the present invention; Figure 6 It is a structural schematic diagram of the clamping force adjustment component in the present invention.

[0022] Among them, 3, fixed ring; 4, driving assembly; 41, rotating ring; 42, pull rod; 43, clamping force adjustment assembly; 431, sleeve; 432, threaded rod; 433, threaded collar; 5, clamping mechanism; 51, rotating rod; 52, extension plate; 53, clamping plate; 54, torsion spring; 55, positioning pin; 56, positioning groove; 57, adjusting bolt; 58, spring piece; 6, reset tension spring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example: Please see attached Figure 1 -Attached Figure 5 The embodiment of the present invention provides a fixing fixture for inner hole processing of ring-type parts, including a fixing ring 3, a driving assembly 4 for driving is installed in the middle of the fixing ring 3, and the driving assembly 4 includes a rotating ring 41, the rotating ring 41 is rotatably connected to the inner side of the fixing ring 3, and a pull rod 42 is fixedly connected to the outer side of the rotating ring 41, and a clamping force adjustment assembly 43 is installed at the other end of the pull rod 42, and the other end of the clamping force adjustment assembly 43 is installed at the outer side of the fixing ring 3. After adjusting the clamping force adjustment assembly 43, the rotating ring 41 can be driven to rotate by the pull rod 42. Since the rotating ring 41 is restricted by the fixing ring 3, the rotating ring 41 rotates concentrically with the fixing ring 3 inside the fixing ring 3. The fixing ring 3 and the rotating ring 41 are both provided with a groove at the top, and a reset tension spring 6 is installed inside the groove, one end of the reset tension spring 6 is connected to the fixing ring 3, and the other end is connected to the rotating ring 41. The positions of the rotating ring 41 and the fixing ring 3 are adjusted by the reset tension spring 6. When the rotating ring 41 needs to be rotated, the reset tension spring 6 provides tension to ensure the stability and efficiency of the rotation.

[0025] Please see attached Figure 3 -Attached Figure 6 The clamping force adjustment component 43 includes a sleeve 431, a threaded rod 432 and a threaded collar 433. The sleeve 431 is rotatably connected to the outside of the fixing ring 3, the threaded rod 432 is rotatably connected to the middle of the sleeve 431, the threaded collar 433 is threadedly connected to the outer periphery of the threaded rod 432, and the threaded collar 433 is rotatably connected to the bottom of the pull rod 42. The threaded rod 432 is rotated by twisting the threaded rod 432. At this time, the threaded collar 433 is driven to slide back and forth under the action of the external thread of the threaded rod 432, and the position of the pull rod 42 is changed under the action of the rotational connection at both ends of the clamping force adjustment component 43, so that the pull rod 42 and the fixing ring 3 rotate relative to each other, thereby adjusting the position of the rotating rod 51 to complete the clamping operation of the annular part. Through the mutual cooperation of the sleeve 431, the threaded rod 432 and the threaded collar 433, the power connection problem of the clamp in the horizontal lathe is avoided. At the same time, after the clamp is installed vertically, it can be assembled in the vertical lathe and machining center, thereby greatly improving the application scope of the clamp. In the vertical lathe or machining center, the clamping force adjustment component 43 can be replaced by an electric push rod or a telescopic cylinder to reduce manual adjustment operations, so as to further improve the automation level of the equipment.

[0026] Please see attached Figure 3 -Attached Figure 5 A clamping mechanism 5 for clamping parts is installed between the driving assembly 4 and the fixed ring 3. After placing the parts on the upper part of the clamping mechanism 5, the clamping mechanism 5 can be driven by driving the driving assembly 4 to clamp the parts, thereby facilitating the inner hole processing operation of the parts. The clamping mechanism 5 includes a rotating rod 51, which rotates in the middle of the rotating ring 41. A positioning pin 55 is fixedly connected to the middle of the fixed ring 3. A positioning groove 56 is opened in the middle of the rotating rod 51. The positioning pin 55 is located in the middle of the positioning groove 56. When the rotating ring 41 is driven by the clamping force adjustment assembly 43 to rotate, the rotating rod 51 is driven to move synchronously. Since the positions of the positioning pin 55 and the fixed ring 3 remain fixed, when the rotating rod 51 moves, it is affected by the positioning pin 55 and deflected, so as to clamp the parts.

[0027] The end of the rotating rod 51 away from the positioning pin 55 is installed with an extension plate 52 through an adjusting component. The top of the extension plate 52 is rotatably connected to a clamping plate 53. A torsion spring 54 is sleeved on the bottom of the clamping plate 53. One end of the torsion spring 54 is fixed to the bottom of the extension plate 52, and the other end is fixed to the bottom of the clamping plate 53. The parts are placed between multiple clamping plates 53, and then the rotating ring 41 is driven to rotate by adjusting the clamping force adjustment component 43. At this time, the rotating rod 51 is deflected by the movement of the positioning pin 55 to drive the clamping plate 53 to approach the workpiece. After the clamping plate 53 contacts the workpiece, the clamping of the workpiece can be completed. The adjustment assembly includes an adjusting bolt 57, one end of which is rotatably connected to the outside of the rotating rod 51, and the other end of the adjusting bolt 57 passes through and is threadedly connected to the outer side of the extension plate 52. During the clamping process, if there is an error in the distance between one or more of the clamping plates 53 and the workpiece, the length of the extension plate 52 extending out of the rotating rod 51 can be adjusted by turning the adjusting bolt 57, so that the position of the clamping plate 53 can be fine-tuned to achieve full clamping of the workpiece.

[0028] Please see attached Figure 3 -Attached Figure 6The clamping plate 53 is preferably made of spring steel material, and the side of the clamping plate 53 close to the part is roughened. When the clamping plate 53 approaches the part, the clamping plate 53 is subjected to the reaction of the part, and the two side ends can be compressed and deformed, thereby causing the inner curvature of the clamping plate 53 to change, so as to facilitate the clamping of parts with different curvatures. A spring sheet 58 is fixedly connected to the outer notch, and the spring sheet 58 is used to provide additional elastic force for the clamping plate 53 to ensure that the clamping plate 53 can fully rebound after the part is released, thereby alleviating the loss of elastic force of the clamping plate 53 caused by multiple clamping, thereby extending the service life. The roughened clamping plate 53 can increase the friction between the part and the part to ensure the stability of the part after clamping, so as to facilitate the subsequent inner hole processing operation. The side walls of the fixed ring 3 and the rotating ring 41 are both provided with a through notch, and the rotating rod 51 is placed in the notch.

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

Claims

1. A fixing fixture for machining inner holes of ring-like parts, comprising a fixing ring (3), characterized in that: A driving assembly (4) for driving is installed in the middle of the fixing ring (3), and a clamping mechanism (5) for clamping parts is installed between the driving assembly (4) and the fixing ring (3).

2. The fixing fixture for inner hole machining of ring parts according to claim 1 is characterized in that: The driving assembly (4) comprises a rotating ring (41), the rotating ring (41) being rotatably connected to the inner side of the fixed ring (3), a pull rod (42) being fixedly connected to the outer side of the rotating ring (41), a clamping force adjustment assembly (43) being installed at the other end of the pull rod (42), and the other end of the clamping force adjustment assembly (43) being installed at the outer side of the fixed ring (3).

3. The fixing fixture for inner hole machining of ring parts according to claim 2 is characterized in that: The clamping force adjustment assembly (43) comprises a sleeve (431), a threaded rod (432) and a threaded collar (433); the sleeve (431) is rotatably connected to the outside of the fixing ring (3); the threaded rod (432) is rotatably connected to the middle of the sleeve (431); the threaded collar (433) is threadedly connected to the outer periphery of the threaded rod (432); and the threaded collar (433) is rotatably connected to the bottom of the pull rod (42).

4. The fixing fixture for inner hole machining of ring parts according to claim 2 is characterized in that: The clamping mechanism (5) comprises a rotating rod (51), the rotating rod (51) rotating in the middle of the rotating ring (41), a positioning pin (55) fixedly connected in the middle of the fixed ring (3), a positioning groove (56) opened in the middle of the rotating rod (51), the positioning pin (55) is located in the middle of the positioning groove (56), an extension plate (52) is installed at one end of the rotating rod (51) away from the positioning pin (55) through an adjustment component, and a clamping plate (53) is rotatably connected to the top of the extension plate (52).

5. The fixing fixture for inner hole machining of ring parts according to claim 4 is characterized in that: A torsion spring (54) is sleeved on the bottom of the clamping plate (53); one end of the torsion spring (54) is fixed to the bottom of the extension plate (52), and the other end is fixed to the bottom of the clamping plate (53).

6. The fixing fixture for inner hole machining of ring parts according to claim 4, characterized in that: The adjustment assembly comprises an adjustment bolt (57), one end of the adjustment bolt (57) being rotatably connected to the outside of the rotation rod (51), and the other end of the adjustment bolt (57) passing through and being threadedly connected to the outer hanging ear of the extension plate (52).

7. The fixing fixture for inner hole machining of ring parts according to claim 3 is characterized in that: The tops of the fixed ring (3) and the rotating ring (41) are both provided with grooves, and a return spring (6) is installed inside the grooves. One end of the return spring (6) is connected to the fixed ring (3), and the other end is connected to the rotating ring (41).

8. The fixing fixture for inner hole machining of ring parts according to claim 4 is characterized in that: The clamping plate (53) is preferably made of spring steel material, and a side of the clamping plate (53) close to the part is roughened.

9. The fixing fixture for inner hole machining of ring parts according to claim 8, characterized in that: A spring sheet (58) is fixedly connected to the notch on the outside of the clamping plate (53).

10. The fixing fixture for inner hole machining of ring parts according to claim 4, characterized in that: The side walls of the fixed ring (3) and the rotating ring (41) are both provided with through-going notches, and the rotating rod (51) is placed in the notches.

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