Clamping tool for tail end of hollow pipe

Abstract

The utility model relates to a hollow pipe tail end clamping tool which comprises a conical rod, the large-size end of the conical rod is rotationally connected with a bearing seat through a bearing, the bearing seat is coaxially and fixedly connected with a flange plate, the flange plate is provided with a plurality of threaded holes for bolts to penetrate through so as to be fixedly connected with a chuck, and the hollow pipe tail end clamping tool is installed on a lathe tailstock. Coaxiality of the hollow pipe during machining can be guaranteed, the situation that the machining precision is affected by shaking of the hollow pipe is avoided, the yield is effectively improved, clamping is convenient, and cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hollow pipe tail end clamping tool. BACKGROUND

[0002] The tailstock is an important part of the lathe in the mechanical processing, which is installed in the tailstock part of the lathe. It limits the degree of freedom of the processed parts together with the main shaft in the processing process, and can also center the workpiece. The tailstock is divided into fixed tailstock and rotary tailstock. However, the hollow object cannot be effectively contacted and centered.

[0003] At present, in the process of machining hollow pipes on the lathe, only one end of the pipe is clamped, that is, one end is positioned, and the other end is not positioned. During processing, the other end is prone to shaking, and the longer the hollow pipe is, the more obvious the shaking is. The shaking can easily cause the deformation of the hollow pipe, and the centering is difficult. It also affects the machining precision of the processed part, reduces the yield, and needs to be improved. UTILITY MODEL CONTENT

[0004] In view of the shortcomings of the prior art, the utility model solves the technical problem to provide a hollow pipe tail end clamping tool, which not only has a reasonable structure, but also significantly improves the machining precision.

[0005] In order to solve the above technical problems, the technical scheme of the utility model is as follows: a hollow pipe tail end clamping tool, comprising a tapered rod, the larger size end of the tapered rod is rotatably connected with a bearing seat through a bearing, a flange plate is coaxially fixedly connected on the bearing seat, and a plurality of threaded holes for bolts to pass through to fixedly connect a chuck are formed on the flange plate.

[0006] Further, the cross section of the tapered rod is circular, which comprises a tapered plug-in section and a horizontal connecting section. The diameter of the connecting section is consistent with the maximum diameter of the plug-in section. The connecting section is provided with a bearing and connected with the bearing seat through the bearing.

[0007] Further, the flange plate is coaxially protruded with a positioning protrusion at one end connected with the chuck, which is used to top into the central shaft hole of the chuck.

[0008] Further, the threaded holes are uniformly distributed in four groups.

[0009] Further, the chuck is a four-jaw chuck, and the clamping jaws of the four-jaw chuck are staggered with the threaded holes.

[0010] Compared with the prior art, the utility model has the following beneficial effects: the tool is installed on the tailstock of the lathe, which can ensure the coaxiality of the hollow pipe during processing, avoid the shaking of the pipe to affect the machining precision, effectively improve the yield, and conveniently clamp the pipe with low cost.

[0011] The utility model will be further described in detail in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is the structure schematic view of the embodiment of the utility model;

[0013] Fig. 2 It is the front view of the embodiment of the utility model;

[0014] Fig. 3 It is the use state schematic view of the embodiment of the utility model.

[0015] In the drawing: 1-tapered rod, 2-bearing, 3-chock, 4-flange plate, 5-bolt, 6-chuck, 7-thread hole, 8-insertion section, 9-connection section, 10-positioning convex part, 11-hollow pipe, 12-clamping jaw. Specific implementation

[0016] In order to let above-mentioned features and advantages of the utility model can be more obvious and easy to understand, the following text takes example for instance, and cooperates with the drawing, makes detailed explanation as follows.

[0017] As Figs. 1-3 Shown, hollow pipe tail end clamping tool, including tapered rod 1, the tapered rod larger size one end rotationally connected with chock 3 through bearing 2, the chock is coaxially fixedly connected with flange plate 4 on the side away from the tapered rod, a plurality of thread holes 7 for bolt 5 are set up on the flange plate to be used to fixedly connect chuck 6.

[0018] In the embodiment of the utility model, the cross section of the tapered rod is circular, which includes a tapered insertion section 8 and a horizontal connection section 9, the diameter of the connection section is consistent with the maximum diameter of the insertion section, and the connection section is provided with a bearing and connected with the chock through the bearing.

[0019] In the embodiment of the utility model, the flange plate is coaxially protruded with a positioning convex part 10 at one end connected with the chuck to be used to top into the central shaft hole of the chuck.

[0020] In the embodiment of the utility model, the thread holes are uniformly distributed in four groups.

[0021] In the embodiment of the utility model, the chuck is a four-jaw chuck, and the clamping jaws of the four-jaw chuck are staggered with the thread holes to avoid interference when the clamping jaws move.

[0022] The working principle of the embodiment of the utility model is as follows: first, the rotary center of the lathe tailstock is removed, the small-diameter end of the tapered rod of the tool is inserted into the lathe tailstock and then fastened, the positioning and installation of the tool are completed, in use, first, the hollow pipe to be processed is clamped at the chuck, then the lathe tailstock is slid to move the tool to the tail end of the hollow pipe, at this time, the tail end can be coaxially positioned on the hollow pipe through the four-jaw chuck to prevent the hollow pipe from deforming due to shaking and affecting the yield.

[0023] The utility model is not limited to the above best implementation, and anyone can draw other various forms of hollow pipe tail end clamping tooling under the enlightenment of the utility model. Any change and modification made according to the patent application scope of the utility model should belong to the coverage of the utility model.

Claims

1. A hollow tube end clamping fixture, characterized in that: It includes a tapered rod, the larger end of which is rotatably connected to a bearing seat, a flange coaxially fixed to the bearing seat, and several threaded holes on the flange for bolts to pass through to fix the chuck; the flange and the chuck are connected at one end of which a positioning protrusion is coaxially protruding to be inserted into the central shaft hole of the chuck.

2. The hollow tube tail end clamping fixture according to claim 1, characterized in that: The tapered rod has a circular cross-section and includes a tapered insertion section and a horizontal connecting section. The diameter of the connecting section is the same as the maximum diameter of the insertion section. The connecting section is fitted with a bearing and connected to the bearing seat via the bearing.

3. The hollow tube tail end clamping fixture according to claim 1, characterized in that: The threaded holes are evenly distributed in four groups.

4. The hollow tube tail end clamping fixture according to claim 1, characterized in that: The chuck is a four-jaw chuck, and the jaws of the four-jaw chuck are all staggered from the threaded holes.

Images