CN220050989U - Adjustable internal diameter strutting arrangement - Google Patents

Abstract

The utility model belongs to the technical field of machining and discloses an adjustable inner diameter supporting device which is characterized by comprising a handle-shaped main body and a rotary supporting component arranged at the end part of the handle-shaped main body, wherein the rotary supporting component comprises an annular rotary seat and a plurality of radial tips radially arranged on the annular rotary seat, the annular rotary seat is rotationally connected with the handle-shaped main body through bearings, more than 3 radial tips are uniformly distributed along the circumferential direction of the annular rotary seat, and the radial tips are connected with the annular rotary seat through threads. The device is attached to a lathe, can process a thin-wall large-diameter steel pipe, is combined with a three-jaw chuck and a dial indicator, can adjust the runout of the other end of the thin-wall large-diameter steel pipe clamped at one end to the center, and realizes the processing of turning the end face, turning the outer circle, boring the inner hole and the like.

Description

Adjustable internal diameter strutting arrangement

Technical Field

The utility model belongs to the technical field of machining, relates to a tool and an auxiliary tool, and particularly relates to an adjustable inner diameter supporting device for realizing turning of thin-wall large-diameter pipe parts.

Background

In machining, turning refers to a machining method in which a turning surface or an end surface of a rotating workpiece is cut by a lathe. Generally, when a metal tubular part (hereinafter referred to as a pipe) is machined, a chuck provided at an end of a spindle and a center provided at an end of a tailstock are mutually engaged to fix the pipe from both ends of the pipe. However, when the fixing mode is adopted, the chuck and the center shield the two ends of the pipe respectively, and the fixing mode cannot be suitable for pipe end processing operation. When the end part of the pipe is required to be machined, a supporting piece welded and fixed with the inner wall of the pipe is usually adopted to replace a center to be matched with a chuck to fix the pipe. However, this method has problems in that: welding the support piece on the inner wall of the pipe fitting before processing and removing the welded support piece from the inner wall of the pipe fitting after processing can cause great damage to the precision and appearance of the part and is very inconvenient. Therefore, various more ingenious modes are found to realize the turning and fixing of the pipe fitting, and the improvement of the machining quality and efficiency is necessary.

Disclosure of Invention

The present utility model is directed to solving the above-mentioned problems of the prior art, and aims to provide a supporting device for fixing a pipe by means of contact from the inside of the pipe.

In order to solve the problems, the technical scheme is that the adjustable inner diameter support device is characterized by comprising a handle-shaped main body and a rotary support assembly arranged at the end part of the handle-shaped main body, wherein the rotary support assembly comprises an annular rotary seat and a plurality of radial tips radially arranged on the annular rotary seat, the annular rotary seat is rotationally connected with the handle-shaped main body through bearings, more than 3 radial tips are uniformly distributed along the circumferential direction of the annular rotary seat, and the radial tips are in threaded connection with the annular rotary seat.

Further, the annular rotating seat is composed of a rotating inner ring and a rotating outer ring, a bearing is arranged between the rotating inner ring and the handle-shaped main body, the outer conical surface of the rotating inner ring is matched with the inner conical surface of the rotating outer ring, the rotating inner ring is fixedly connected with the rotating outer ring through bolts, and the radial center is arranged on the rotating outer ring.

Further, the bearing outer ring is matched with an inner hole of the rotary inner ring, and the bearing outer ring and the rotary inner ring are axially fixed through an inner clamping spring; the bearing inner ring is sleeved on the handle-shaped main body, and the bearing inner ring and the handle-shaped main body are axially fixed through the outer clamping spring.

Further, the outer circular contour of the rotary inner ring is in a circular truncated cone structure, and the side surface of the circular truncated cone is the outer conical surface.

Further, the center of the rotary outer ring is of a groove structure, the side surface of the groove, which is inclined, is the inner conical surface, and the rotary inner ring is fixedly connected with the bottom of the groove through bolts.

Further, a plurality of bosses with threaded holes are arranged on the outer circular surface of the rotary outer ring corresponding to the plurality of radial apexes, external threads matched with the threaded holes of the bosses are arranged on the main body of each apexes, and a locking nut is sleeved on the main body of each apexes.

Further, a hexagonal nut for screwing the center is arranged at the joint of the head part of the center and the main body part.

Further, the number of the tips is 6.

The utility model has the beneficial effects that: the radial center is used for propping up the inner wall of the pipe fitting from the inside of the pipe fitting, so that the pipe fitting is supported and fixed, and further the end face turning, excircle turning, inner hole boring and other processing of the pipe fitting are realized. Compared with the welding support piece on the inner wall of the pipe fitting, the fixing and dismantling of the workpiece can be conveniently completed, and more importantly, the damage to the precision and appearance of the workpiece can be effectively avoided.

Drawings

The adjustable inner diameter support device of the present utility model is further described below with reference to the drawings and detailed description.

FIG. 1 is a schematic view of the overall structure of the adjustable inner diameter support device of the present utility model.

Fig. 2 is an exploded view of the adjustable inner diameter support device of the present utility model.

FIG. 3 is a schematic cross-sectional view of an adjustable inner diameter support device of the present utility model.

FIG. 4 is a schematic view showing the use state of the adjustable inner diameter support device of the present utility model.

Detailed Description

Referring to fig. 1-3, the adjustable inner diameter supporting device comprises a No. 5 Morse taper shank main body 1, a rotary inner ring 22, a rotary outer ring 21, six radial tips 3, a rolling bearing 4, an outer clamping spring 41, an inner clamping spring 42, four inner hexagonal fixing bolts 25 and a locking nut 24, wherein the shank of the No. 5 Morse taper shank main body 1 is used for being matched and connected with a tail frame inner hole of a lathe, the rolling bearing 4 is sleeved on an end shaft shoulder of the No. 5 Morse taper shank main body 1, an inner ring of the rolling bearing is axially fixed with the end shaft shoulder of the No. 5 Morse taper shank main body 1 through an outer clamping spring 41, an inner hole of the rotary inner ring 22 is matched with an outer ring of the rolling bearing 4, and the rotary inner ring 22 is axially fixed with the outer ring of the rolling bearing 4 through the inner clamping spring 42.

The outer circle of the rotary inner ring 22 is provided with an outer conical surface which is matched with an inner conical surface of the central groove of the rotary outer ring 21, and an inner hexagonal fixing bolt 25 penetrates through a bolt hole at the bottom of the central groove of the rotary outer ring 21 from the end surface of the rotary inner ring and is screwed into a threaded hole on the rotary inner ring to fix the rotary inner ring 22 and the rotary outer ring 21. Six bosses with evenly distributed internal threaded holes are arranged in the center of the outer circle surface of the rotary outer ring, external threads of the main body part of the radial center 3 are matched with internal threads of the boss 23 of the rotary outer ring, the main body part of the radial center 3 is arranged in the internal threaded holes of the boss, and the radial center can be screwed to adjust the length of the radial center. The lock nut 24 is sleeved on the main body part of the radial center, the lock nut is screwed on the boss 23, and the lock nut is tightly pressed with the end face of the boss, so that the radial center is locked.

In order to be suitable for irregular pipe fittings, the radial center can be made into various specifications with different lengths so as to realize a support range with larger inner diameter.

Referring to fig. 4, when the adjustable inner diameter support device of the utility model is used, the handle part of the No. 5 Morse taper shank main body is inserted into the lathe tailstock and fixed, so that the centering height is realized. One end of the pipe 101 is then clamped by a three jaw chuck 102 mounted on the end of the lathe spindle. And then the inner diameter adjustable supporting device is put into the inner hole of the pipe fitting, and each radial center 3 is screwed to enable the head of the inner diameter adjustable supporting device to be in contact with the inner wall of the pipe fitting. Setting a dial indicator 103 on one side of a pipe fitting where a cutter 104 is located, manually rotating the pipe fitting, estimating the telescopic adjustment quantity of the radial center by using the jump of the dial indicator, and correspondingly adjusting until the dial indicator needle does not jump, realizing the coaxiality of the adjustable inner diameter supporting device and the three-jaw chuck, and finally locking the radial center by using a locking nut 24, thereby accurately realizing the coaxiality correction without errors, having no influence on a machine tool and a workpiece, and realizing the processing of large-diameter tubular parts.

It should be understood that: the above embodiments are merely illustrative of the present utility model, and not limiting, and any utility model that does not depart from the spirit and scope of the present utility model falls within the scope of the utility model.

Claims (8)

1. The utility model provides an adjustable internal diameter strutting arrangement, its characterized in that includes handle form main part and sets up the rotation support subassembly at handle form main part tip, rotation support subassembly includes annular roating seat and a plurality of radial apexes that radially set up on annular roating seat, rotate through the bearing between annular roating seat and the handle form main part and be connected, radial apexes are more than 3, evenly distributed along the circumferencial direction of annular roating seat, pass through threaded connection between radial apexes and the annular roating seat.

2. The adjustable inner diameter support device according to claim 1, wherein the annular rotating seat is composed of a rotating inner ring and a rotating outer ring, a bearing is arranged between the rotating inner ring and the handle-shaped main body, an outer conical surface of the rotating inner ring is matched with an inner conical surface of the rotating outer ring, the rotating inner ring is fixedly connected with the rotating outer ring through bolts, and the radial center is arranged on the rotating outer ring.

3. The adjustable inner diameter support device according to claim 2, wherein the bearing outer ring is matched with the inner hole of the rotary inner ring, and the bearing outer ring and the rotary inner ring are axially fixed through an inner clamping spring; the bearing inner ring is sleeved on the handle-shaped main body, and the bearing inner ring and the handle-shaped main body are axially fixed through the outer clamping spring.

4. The adjustable inner diameter support device of claim 3, wherein the outer circular contour of the rotary inner ring has a circular truncated cone structure, and the side surface of the circular truncated cone is the outer conical surface.

5. The adjustable inner diameter support device according to claim 4, wherein the center of the rotary outer ring is a groove structure, the side surface of the groove inclined is the inner conical surface, and the rotary inner ring is fixedly connected with the bottom of the groove through a bolt.

6. The adjustable inner diameter support device according to claim 5, wherein a plurality of bosses with threaded holes are arranged on the outer circular surface of the rotary outer ring corresponding to the plurality of radial apexes, external threads matched with the threaded holes of the bosses are arranged on the main body part of the apexes, and a locking nut is sleeved on the main body part of the apexes.

7. The adjustable inner diameter support device according to claim 1, wherein a hexagonal nut for screwing the tip is provided at a junction of the head portion of the tip and the main body portion.

8. The adjustable inner diameter support device of claim 1, wherein the number of tips is 6.