Inner diameter supporting device suitable for machining end face and inner hole of pipe fitting

Abstract

The utility model belongs to the technical field of machining, and discloses an inner diameter supporting device suitable for pipe fitting end face and inner hole machining, which comprises a handle-shaped main body and a synchronous rotation supporting assembly, and the synchronous rotation supporting assembly comprises a supporting seat, an annular adjusting disc and a ratchet wheel locking mechanism. At least three ejector rods arranged in the radial direction are assembled on the supporting seat, the ejector rods are connected with the supporting seat through threads, each ejector rod is composed of a threaded section and a sliding section, a small gear is assembled on the sliding section of each ejector rod in a sliding mode, a rotation limiting structure is arranged between each small gear and the corresponding ejector rod, and a large gear ring is arranged on the side, facing the supporting seat, of the annular adjusting disc. And the small gear is meshed with the large gear ring. A plurality of ejector rods are synchronously driven through the annular adjusting disc, the using process of the device is simplified, and the machining quality and efficiency are effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing, relates to tooling and clamping aids, and specifically is an inner diameter supporting device for realizing lathe processing of long tube parts. Background Art

[0002] In mechanical processing, the end faces or inner holes of tubular parts are mainly processed by turning, milling or boring machines. The processing range of the machine tool directly affects whether the parts can be processed and the processing efficiency. For the end faces and inner holes of long pipes, milling machines and boring machines with larger strokes are required, so the advantages of lathes are reflected. However, the taper center used in the lathe's own supporting tailstock limits the tool feed space, and it is impossible to process the inner holes and the end faces of thin-walled pipes. To address this problem, a welding dummy shaft is usually used to solve it. When welding, installing and removing the dummy shaft, the inner wall of the component will be damaged and cause deformation, which requires further processing.

[0003] In response to the shortcomings of the method of welding a dummy shaft, a Chinese utility model patent with patent application number CN2023217019902 discloses an adjustable inner support device, which supports the pipe fitting from the inside by a radially arranged top, does not damage the inner wall of the pipe fitting, and is more convenient than welding operations. However, the disadvantage is that the tops need to be adjusted one by one, and the form and position tolerances need to be measured by a table so that the coaxiality between the axis of the pipe fitting and the rotation axis of the internal support device is within the error range. It is especially difficult to adjust thin-walled long tubes, especially when the previous part is processed and the next part is replaced. The tops have to be readjusted one by one and measured by a table, which is not only time-consuming, but also the clamping and positioning accuracy of each part is uneven. Therefore, it is very necessary to design a tooling fixture that is easy to adjust and has small deformation to achieve the machining, fixation and positioning of long pipe fittings, and improve the processing quality and efficiency. Utility Model Content

[0004] The utility model aims to solve the above problems existing in the prior art and to provide a supporting device for fixing a pipe fitting by synchronous contact radial adjustment from the inside of the pipe fitting.

[0005] To solve the above problems, the technical solution adopted by the utility model is: an inner diameter support device suitable for pipe end face and inner hole processing, comprising a handle-shaped main body and a synchronously rotating support assembly arranged at the end of the handle-shaped main body through a bearing, the synchronously rotating support assembly comprising a support seat, an annular adjustment disk arranged on one side of the support seat and rotatably connected to the support seat, and a ratchet locking mechanism for limiting the rotation of the annular adjustment disk relative to the support seat, the support seat is equipped with at least three radially arranged push rods, the push rods are connected to the support seat by threads, the push rods are composed of a threaded section and a sliding section, a small gear is slidably assembled on the sliding section of each push rod, a rotation limiting structure is provided between the small gear and the push rod, and a large gear ring is provided on the side of the annular adjustment disk facing the support seat, and the small gear is meshed with the large gear ring.

[0006] Furthermore, the ratchet locking mechanism includes a ratchet and a pawl, the ratchet is fixed to the support seat, and the pawl is rotatably mounted on the annular adjustment disk by a bolt, and the ratchet can be locked and loosened by adjusting the pawl bolt.

[0007] Furthermore, the ratchet is fastened to the support seat by bolts, and a rotating slide groove of an annular adjustment disk is formed between the ratchet and the support seat.

[0008] Furthermore, the push rod is evenly distributed along the circumferential direction on the support seat, a push rod sliding sleeve is provided between the sliding section of the push rod and the support seat, the pinion is sleeved on the push rod through the assembly hole, and the assembly hole of the pinion is matched with the sliding clearance of the sliding section of the push rod.

[0009] Furthermore, the end of the threaded section of the mandrel is threadedly assembled with a top and a nut for locking the axial position of the top.

[0010] Furthermore, the rotation limiting structure includes a symmetrical groove provided in the sliding section of the push rod, and a symmetrical boss provided in the assembly hole of the pinion and matching with the symmetrical groove.

[0011] Furthermore, the head end of the handle-shaped body is provided with a retaining ring groove and a shoulder, and the tail end of the handle-shaped body is provided with a Morse taper handle. When processing the inner hole of a long tube, the handle-shaped body is provided with a tool withdrawal groove according to the processing position of the inner hole of the long tube so that the tool head can enter the inner hole for processing.

[0012] Furthermore, the outer contour of the annular adjustment disk is provided with an anti-skid knurled thread.

[0013] Furthermore, a groove for accommodating the pinion gear is vertically arranged on the end surface of the support seat facing the annular adjustment disk.

[0014] Furthermore, the top of the apex is configured as an arc shape. In addition, when the long tube is a thin-walled part, the head of the apex can be configured as an arc plate, and the arc of the arc plate is consistent with the inner diameter of the thin-walled tube.

[0015] The beneficial effects of the utility model are as follows: the radial push rod is used to synchronously push against the inner wall of the pipe fitting from the inside of the pipe fitting to support and fix the pipe fitting, thereby realizing the processing of turning the end face, turning the outer circle and boring the inner hole of the pipe fitting. Through the meshing relationship between the large gear ring on the annular adjustment plate and the small gear on the radial push rod, each radial push rod is synchronously driven to rotate. The radial push rod is based on the threaded connection with the support seat to achieve synchronous radial expansion and contraction during synchronous rotation. Compared with welding the support on the inner wall of the pipe fitting or adjusting each top, it can not only effectively avoid deformation of the pipe fitting to ensure processing accuracy, but also be suitable for processing end faces, inner holes and outer diameters of different thicknesses and pipe diameters. It can also very conveniently complete the fixation and removal of the workpiece. More importantly, it can save a lot of time for the coaxiality of the axis of the pipe fitting and the rotation axis of the inner support device each time the next part is replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The inner diameter support device suitable for processing the end face and inner hole of a pipe fitting according to the utility model will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0017] FIG. 1 is a schematic diagram of the overall structure of the inner diameter support device of the present invention.

[0018] FIG. 2 is a schematic cross-sectional view of the inner diameter support device of the present invention.

[0019] Figure 3 It is a schematic diagram of the push rod structure of the inner diameter support device of the utility model.

[0020] Figure 4 is Figure 2 FF section view is shown.

[0021] Figure 5 is Figure 4 Enlarged structural diagram at the center circle O.

[0022] Figure 6 It is a schematic diagram of the working principle of the annular adjustment disk driving the push rod. DETAILED DESCRIPTION

[0023] 1-5, the utility model is suitable for the inner diameter support device of the pipe end face and inner hole processing, including a handle-shaped body 1 and a synchronous rotation support assembly 2 arranged at the end of the handle-shaped body 1 through a bearing 26, the synchronous rotation support assembly 2 includes a support seat 23, an annular adjustment disk 22 arranged on one side of the support seat 23 and rotatably connected to the support seat 23, and a ratchet locking mechanism 21 for limiting the rotation of the annular adjustment disk 22 relative to the support seat 23, and the support seat 23 is evenly distributed along the circumference. The push rod 24 is connected to the support seat 23 by a thread, and the radial push rod 24 is connected to the support seat 23. The rod 24 is composed of a threaded section 241 and a sliding section 244. The pinion 25 is slidably assembled on the sliding section 244 and the radial push rod 24 through the assembly hole through the center. The pinion 25 and the radial push rod 24 are limited in relative rotation by the symmetrical boss 252 structure set in the assembly hole of the pinion and the symmetrical groove 2412 structure set in the sliding section of the radial push rod 24. A push rod sliding sleeve 231 is set between the sliding section 244 of the push rod and the support seat. The outer wall of the push rod sliding sleeve is interference fit with the support seat, and the inner wall is clearance fit with the sliding section of the push rod. A large gear ring 221 is set on the side of the annular adjustment plate 22 facing the support seat 23, and three pinions 25 are respectively meshed with the large gear ring 221. The ratchet locking mechanism 21 includes a ratchet 211 and a pawl 212. The pawl 212 is arranged on the annular adjustment disk 22 by a bolt 213. The adjusting bolt 213 can lock or loosen the pawl 212. The ratchet 211 is fastened to the support seat by a bolt 27. A rotation slot of the annular adjustment disk is formed between the ratchet and the support seat to realize the rotation connection between the annular adjustment disk and the support seat. The end of the threaded end of the push rod 24 is threadedly assembled with a top 242 and a nut 243 for locking the top.

[0024] Before using the inner diameter support device for pipe end face and inner hole processing of the utility model, the tops are calibrated first so that the tops of the tops are located on the concentric circles of the rotation axis, and then the tops are locked with nuts 243. When starting to process parts, the Morse taper shank part of the shank-shaped main body 1 of the inner diameter support device suitable for processing the end face and inner hole of the pipe fitting is inserted into the tailstock of the lathe, the inner diameter support device suitable for processing the end face and inner hole of the pipe fitting synchronously rotates the support assembly 2 and extends into the inner hole of the long pipe part, the bolt 213 of the ratchet locking mechanism 21 is loosened, and the annular adjustment disk 22 is rotated. The large gear ring 221 on one side of the annular adjustment disk 22 toward the support seat 23 synchronously drives the pinions 25 on the three push rods to rotate, and the three pinions 25 respectively drive the three push rods 24 to rotate. Under the action of the thread, the three push rods radially extend and retract synchronously relative to the support seat until the top pushes against the inner wall of the pipe fitting. When the push rod 24 is supported in place, the pawl 212 of the ratchet locking mechanism 21 is kept engaged with the ratchet 211, and the bolt 213 is locked at the same time to ensure that the push rod 24 cannot move radially, which can ensure the processing of tubular parts, realize one-time device adjustment, and is universal for long pipe fittings of the same specification, and can be quickly processed without re-adjusting the table.

[0025] It should be understood that the above implementation is only an explanation of the utility model, not a limitation of the utility model. Any utility model creation that does not exceed the essential spirit of the utility model shall fall within the protection scope of the utility model.

Claims

1. An inner diameter support device suitable for processing the end face and inner hole of a pipe fitting, comprising a handle-shaped body and a synchronous rotating support assembly arranged at the end of the handle-shaped body through a bearing, characterized in that: The synchronously rotating support assembly includes a support seat, an annular adjustment disk arranged on one side of the support seat and rotatably connected to the support seat, and a ratchet locking mechanism for limiting the rotation of the annular adjustment disk relative to the support seat. The support seat is equipped with at least three radially arranged push rods, and the push rods are connected to the support seat by threads. The push rods are composed of a threaded section and a sliding section. A small gear is slidably assembled on the sliding section of each push rod, and a rotation limiting structure is provided between the small gear and the push rod. A large gear ring is provided on the side of the annular adjustment disk facing the support seat, and the small gear is meshed with the large gear ring.

2. The inner diameter support device suitable for pipe end face and inner hole processing according to claim 1, characterized in that: The ratchet locking mechanism comprises a ratchet and a pawl, wherein the ratchet is fixed to a supporting seat, and the pawl is rotatably mounted on an annular adjusting disk through a bolt.

3. The inner diameter support device suitable for pipe end face and inner hole processing according to claim 2, characterized in that: The ratchet is fastened to the support seat by bolts, and a rotation slot of an annular adjustment disk is formed between the ratchet and the support seat.

4. The inner diameter support device suitable for pipe end face and inner hole processing according to claim 1, characterized in that: The push rods are evenly distributed on the support seat along the circumferential direction, a push rod sliding sleeve is arranged between the sliding section of the push rod and the support seat, and the assembly hole of the pinion gear is matched with the sliding clearance of the sliding section of the push rod.

5. The inner diameter support device suitable for pipe end face and inner hole processing according to claim 4, characterized in that: The rotation limiting structure includes a symmetrical groove provided in the sliding section of the push rod, and a symmetrical boss provided in the assembly hole of the pinion and matching with the symmetrical groove.

6. The inner diameter support device suitable for pipe end face and inner hole processing according to claim 1, characterized in that: The end of the threaded section of the mandrel is threadedly assembled with a top and a nut for locking the axial position of the top.

7. The inner diameter support device suitable for pipe end face and inner hole processing according to claim 1, characterized in that: The head end of the handle-shaped body is provided with a retaining ring groove and a shaft shoulder, and the tail end of the handle-shaped body is provided with a Morse taper handle.

8. The inner diameter support device suitable for pipe end face and inner hole processing according to claim 1, characterized in that: The outer contour of the annular adjustment disk is provided with an anti-skid knurled thread.

9. The inner diameter support device suitable for pipe end face and inner hole processing according to claim 4, characterized in that: The end surface of the support seat facing the annular adjustment disk is vertically provided with a groove for accommodating the pinion gear.

10. The inner diameter support device suitable for pipe end face and inner hole processing according to claim 6, characterized in that: The top of the peak is arranged in an arc shape.

Images