Clamping and positioning tool for tail end of hollow pipe

Abstract

The utility model relates to a hollow pipe tail end clamping and positioning tool which comprises a sleeve, a limiting pipe is coaxially connected in the sleeve in a sliding mode through a bearing, one end of the limiting pipe penetrates out of the sleeve, a plurality of threaded holes are evenly distributed in the periphery of the end of the limiting pipe, and the threaded holes penetrate through the limiting pipe in the radial direction and extend into the limiting pipe through bolts in a threaded connection mode from outside to inside. A base is fixedly arranged at the lower end of the sleeve, a connecting table is fixedly connected to the lower end of the base, a screw hole is vertically formed in the connecting table in a penetrating mode, and a receding groove communicated with the screw hole and used for allowing a fixing bolt to penetrate through the screw hole is formed in the bottom end of the base in an upward concave mode. Coaxiality and effective centering can be effectively guaranteed, clamping and fixing are stable, the situation that the machining precision is affected due to shaking is avoided, the yield is effectively improved, and cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hollow pipe tail end clamping positioning 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 by 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 easy to shake, 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 cannot center the workpiece. 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 problems and provides a hollow pipe tail end clamping positioning tool, which is not only reasonable in structure, but also convenient and fast.

[0005] In order to solve the above technical problems, the technical scheme of the utility model is as follows: the hollow pipe tail end clamping positioning tool comprises a sleeve, a limiting pipe is coaxially and slidingly connected in the sleeve through a bearing, a plurality of threaded holes are uniformly distributed on the outer periphery of the limiting pipe at one end of the limiting pipe which penetrates out of the sleeve, the threaded holes all penetrate the limiting pipe radially and are screwed into the sleeve from the outside to the inside through bolts, a base is fixedly arranged at the lower end of the sleeve, a connecting table is fixedly connected to the lower end of the base, a screw hole is vertically and penetratingly arranged on the connecting table, and a clearance groove is concavely arranged on the bottom end of the base and communicates with the screw hole and is used for penetrating the fixed bolt through the screw hole.

[0006] Further, the sleeve is engraved with arc-shaped scale lines in the screwing direction of the bolt, so as to judge the screwing feed amount of each bolt, and avoid excessive deformation or change of the hollow pipe axis caused by screwing.

[0007] Further, the connecting table is slidingly connected to the lathe at the lower end, the lathe is provided with a fixed groove, the fixed groove is protruded horizontally into the lathe and is provided with a positioning groove, the positioning groove is provided with a positioning block and is connected to the fixed bolt through the positioning block to position the connecting table, the positioning block is provided with a protrusion at both ends to be inserted into the positioning groove respectively, and the positioning groove is transversely and penetratingly arranged in the lathe.

[0008] Further, the upper end of the lathe is protruded and the cross section is triangular to slidingly match the protruding track of the connecting table.

[0009] Further, the connecting table bottom is concave upward with a sliding groove which transversely penetrates the connecting table to slidingly fit the convex track on the connecting table.

[0010] Further, the yielding slot is inverted V-shaped and transversely penetrates the connecting table.

[0011] Further, the screw holes are symmetrically provided with two groups which are respectively arranged at the two ends of the connecting table.

[0012] Further, the sleeve top is fixed with a hoisting handle to facilitate hoisting.

[0013] Compared with the prior art, the hollow pipe tail end is limited and prevented from deviation by the limiting tube and the bolt, the coaxiality and effective centering can be effectively ensured, the clamping stability is good, the shaking is avoided to affect the machining precision, the good product rate is effectively improved, and the cost is low.

[0014] The utility model will be further and specifically explained in connection with the drawings and the specific embodiment. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structure schematic view of the utility model embodiment;

[0016] Figure 2 It is Figure 1 It is the sectional view of A-A;

[0017] Figure 3 It is the use state schematic view of the utility model embodiment.

[0018] In the drawing: 1-sleeve, 2-bearing, 3-limiting tube, 4-threaded hole, 5-bolt, 6-base, 7-connecting table, 8-screw hole, 9-fixing bolt, 10-yielding slot, 11-scale line, 12-lathe, 13-fixing slot, 14-positioning slot, 15-positioning block, 16-convex part, 17-convex track, 18-sliding groove, 19-hoisting handle. DETAILED DESCRIPTION

[0019] In order to make the above features and advantages of the utility model more obvious and easy to understand, the following embodiment is specifically described, and the detailed description is as follows in connection with the drawings.

[0020] For example, Figures 1-3As shown, the hollow tube tail end clamping positioning tool includes a sleeve 1, a limiting tube 3 is coaxially and slidingly connected in the sleeve through a bearing 2, a plurality of threaded holes 4 are uniformly distributed on the outer periphery of the limiting tube at one end of the limiting tube, the threaded holes all penetrate the limiting tube radially and are screwed into from the outside to the inside through bolts 5, a base 6 is fixedly arranged at the lower end of the sleeve, a connecting table 7 is fixedly connected to the lower end of the base, a screw hole 8 is vertically and penetratingly arranged on the connecting table, and a relief groove 10 is concavely arranged upward at the bottom end of the base and communicates with the screw hole and is used for allowing a fixing bolt 9 to penetrate the screw hole.

[0021] In the embodiment of the utility model, the sleeve is engraved with arc-shaped scale lines 11 in the screwing direction of the bolt, so that the screwing feed amount of each bolt can be judged, and the deformation caused by excessive screwing or the change of the hollow tube axis can be avoided.

[0022] In the embodiment of the utility model, the lower end of the connecting table is slidingly connected to a lathe 12, a fixing groove 13 is arranged on the lathe, a positioning groove 14 is protruded horizontally into the lathe in the fixing groove, a positioning block 15 is arranged in the positioning groove and is connected to the fixing bolt through the positioning block to position the connecting table, that is, the connecting table can be transversely and slidingly adjusted by loosening the fixing bolt, the positioning of the connecting table is completed by tightening the fixing bolt, the two ends of the positioning block are fixedly provided with protruding parts 16 to be respectively inserted into the positioning groove, and the positioning groove transversely penetrates the lathe.

[0023] In the embodiment of the utility model, the upper end of the lathe is protruded and the cross section is triangular to slidingly cooperate with the protruding track 17 of the connecting table.

[0024] In the embodiment of the utility model, the bottom of the connecting table is concavely arranged upward and the cross section is triangular, the sliding groove transversely penetrates the connecting table to slidingly cooperate with the protruding track on the connecting table.

[0025] In the embodiment of the utility model, the relief groove is inverted V-shaped and transversely penetrates the connecting table.

[0026] In the embodiment of the utility model, the screw holes are transversely and symmetrically provided with two groups and are arranged at the two ends of the connecting table in the transverse direction, so that the screw holes can be tightened and loosened.

[0027] In the embodiment of the utility model, the top of the sleeve is fixedly provided with a lifting handle 19 to facilitate lifting.

[0028] The utility model discloses a hollow pipe tail end clamping positioning tool, which comprises a hollow pipe, a positioning pipe, a positioning block, a slide groove, a protruding track, a fixing bolt and a scale line.

[0029] The utility model discloses a hollow pipe tail end clamping positioning tool, which comprises a hollow pipe, a positioning pipe, a positioning block, a slide groove, a protruding track, a fixing bolt and a scale line.

Claims

1. A hollow tube tail end clamping positioning tool, characterized in that: The sleeve is coaxially connected with a limiting tube through a bearing, one end of the limiting tube penetrates the sleeve and is uniformly provided with a plurality of threaded holes along the outer periphery of the limiting tube, the threaded holes penetrate the limiting tube radially and are screwed into the sleeve from the outside to the inside through bolts, the lower end of the sleeve is fixedly provided with a base, the lower end of the base is fixedly connected with a connecting table, a screw hole is vertically and penetratively provided on the connecting table, a clearance groove is concavely provided on the bottom end of the base and communicates with the screw hole and is used for allowing the fixed bolt to penetrate the screw hole.

2. The hollow tube tail end clamping positioning tool according to claim 1, characterized in that: The sleeve is engraved with circular arc scale lines in the screwing direction of the bolt.

3. The hollow tube tail end clamping positioning tool according to claim 1, characterized in that: The lower end of the connecting table is slidingly connected with a lathe, the lathe is provided with a fixing groove, the fixing groove is horizontally and protrusively provided with a positioning groove in the lathe, the positioning groove is provided with a positioning block and is connected with the fixed bolt through the positioning block to position the connecting table, the positioning block is fixedly provided with a protrusion at both ends to be respectively inserted into the positioning groove, and the positioning groove is transversely and penetratively provided in the lathe.

4. The hollow tube tail end clamping positioning tool according to claim 3, characterized in that: The upper end of the lathe is protrusively provided with a triangular cross section to slidingly cooperate with the protruding track of the connecting table.

5. The hollow tube tail end clamping positioning tool according to claim 4, characterized in that: The bottom of the connecting table is concavely provided with a sliding groove, and the sliding groove is transversely and penetratively provided in the connecting table to slidingly cooperate with the protruding track on the connecting table.

6. The hollow tube tail end clamping positioning tool according to claim 1, characterized in that: The clearance groove is inversely V-shaped and transversely penetrates the connecting table.

7. The hollow tube tail end clamping positioning tool according to claim 1, characterized in that: The screw holes are symmetrically provided with two groups and are respectively arranged at the transverse ends of the connecting table.

8. The hollow tube tail end clamping positioning tool according to claim 1, characterized in that: The top of the sleeve is fixedly provided with a lifting handle for lifting.

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