Lathe machining double-end tensioning clamp

Abstract

The utility model discloses a lathe machining double-end tensioning clamp which is characterized by comprising a clamp mandrel, a pull rod movably installed in the clamp mandrel and a tensioning core movably installed on the clamp mandrel and the pull rod, tensioning ends are arranged at the two ends of the tensioning core, and a plurality of contraction grooves are formed in the tensioning ends. The tensioning ends are arranged at the two ends of the tensioning core respectively, the ends matched with the tensioning ends are arranged on the clamp mandrel and the pull rod respectively, the tensioning ends expand outwards to tension a workpiece when outward extrusion force is formed on the tensioning ends through the extrusion ends, the two ends of the workpiece are tensioned through the tensioning ends at the two ends of the tensioning core, the stability of installation of the workpiece is guaranteed, and the machining precision is improved. And the situation that the workpiece jumps due to unilateral tensioning in the machining process, and the accuracy of the machining size of the workpiece is affected is avoided.

Description

Technical Field

[0001] The utility model relates to a clamp, in particular to a double-head tensioning clamp for lathe processing. Background Art

[0002] The outer surface of the rotor needs to be processed by a lathe during the machining process. Since the outer surface is processed, the rotor is usually clamped by tightening the inner hole wall of the rotor with a tensioning chuck. However, the existing tensioning chucks are basically single-sided tensioning. Therefore, when the rotor is clamped, one end is tightened and the other end is tightened against the end face of the clamp. However, in this way, the rotor is prone to jumping when subjected to the cutting force of the tool during the machining process, resulting in poor precision of the processed product. For this reason, a double-head tensioning clamp for lathe machining is proposed. Utility Model Content

[0003] The utility model aims to solve the above problems and provides a double-head tensioning clamp for lathe processing.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a double-head tensioning clamp for lathe processing, which is characterized by comprising a clamp mandrel, a pull rod movably installed in the clamp mandrel, and an expansion core movably installed on the clamp mandrel and the pull rod, and tensioning ends are provided at both ends of the expansion core, and a plurality of shrinkage grooves are provided on the tensioning ends.

[0005] Further preferably, an inner hole arranged obliquely is provided inside the tightening end, and an extrusion end is provided on the clamp core shaft and the pull rod.

[0006] Further preferably, the extrusion end is adapted to the inclined inner hole.

[0007] Further preferably, the clamp core shaft is provided with a supporting end which is slidably connected to the expanding core and supports the expanding core.

[0008] The beneficial effects of the utility model are as follows: by arranging tightening ends at both ends of the expanding core, and arranging ends matching the tightening ends on the clamp core shaft and the pull rod, an outward extrusion force is formed on the tightening end by the extrusion end, and the tightening end expands outward to tighten the workpiece, and the tightening ends at both ends of the expanding core are used to tighten the two ends of the workpiece, thereby ensuring the stability of the workpiece installation and avoiding the workpiece from jumping due to unilateral tightening during the processing, thereby affecting the accuracy of the workpiece processing size. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Attached Figure 1 It is a structural schematic diagram of the utility model;

[0010] Attached Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0011] Attached Figure 3 It is a structural schematic diagram of the expansion core in the utility model.

[0012] Legend: 1. Clamp mandrel; 11. Support end; 2. Pull rod; 3. Expanding core; 31. Tightening end; 32. Shrinkage groove; 33. Inner hole; 4. Extrusion end. DETAILED DESCRIPTION

[0013] Next, we will further explain the double-head tensioning clamp for lathe machining described in the utility model in conjunction with the accompanying drawings.

[0014] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the utility model are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0015] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense; for example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0016] See also Figure 1-3 As shown in the figure, a double-head tensioning fixture for lathe processing is characterized in that it includes a fixture mandrel 1, a pull rod 2 movably installed in the fixture mandrel 1, and an expansion core 3 movably installed on the fixture mandrel 1 and the pull rod 2, and both ends of the expansion core 3 are provided with tensioning ends 31, and the tensioning ends 31 are provided with a plurality of contraction grooves 32;

[0017] By arranging tightening ends 31 at both ends of the expanding core 3, and arranging ends matching the tightening ends 31 on the clamp core shaft 1 and the pull rod 2, an outward extrusion force is formed on the tightening end 31 through the extrusion end 4, and the tightening end 31 expands outward to tighten the workpiece, and the tightening ends 31 at both ends of the expanding core 3 are used to tighten the two ends of the workpiece, thereby ensuring the stability of the workpiece installation and avoiding the workpiece from jumping due to unilateral tightening during the processing, thereby affecting the accuracy of the workpiece processing size.

[0018] In one embodiment, the tensioning end 31 is provided with an inner hole 33 which is inclined, and the clamp mandrel 1 and the pull rod 2 are both provided with an extrusion end 4, and the extrusion end 4 is adapted to the inner hole 33 which is inclined;

[0019] By setting the inclined inner hole 33 and matching the extrusion end 4 with the inner hole 33, when the workpiece is tightened by the expanding core 3, the pull rod 2 is pulled backward, and the pull rod 2 drives the expanding core 3 to move backward until the inner holes 33 at both ends of the expanding core 3 are respectively fitted with the pull rod 2 and the extrusion end 4 on the clamp core shaft 1, and then the pull rod 2 continues to move backward, and the tightening end 31 is squeezed outward by the cooperation of the extrusion end 4 and the inner hole 33. The tightening end 31 tightens the inner wall of the workpiece during the outward expansion process, thereby completing the clamping of the workpiece.

[0020] In one embodiment, the clamp core shaft 1 is provided with a support end 11 which is slidably connected to the expanding core 3 and supports the expanding core 3. When the expanding core 3 is not working, the supporting end 11 is slidably installed on the supporting end 11. At the same time, the expanding core 3 moves along the supporting end 11 when subjected to the pulling force of the pull rod 2. The supporting end 11 guides and limits the movement of the expanding core 3.

[0021] The protection scope of the present utility model is not limited to the above embodiments and their variations. Conventional modifications and replacements made by those skilled in the art based on the contents of this embodiment all fall within the protection scope of the present utility model.

Claims

1. A double-head tensioning fixture for lathe processing, characterized in that The invention comprises a clamp core shaft (1), a pull rod (2) movably mounted in the clamp core shaft (1), and an expansion core (3) movably mounted on the clamp core shaft (1) and the pull rod (2), wherein both ends of the expansion core (3) are provided with tightening ends (31), and the tightening ends (31) are provided with a plurality of contraction grooves (32).

2. A double-head tensioning fixture for lathe processing according to claim 1, characterized in that: The tightening end (31) is provided with an inner hole (33) arranged in an inclined manner, and the clamp core shaft (1) and the pull rod (2) are both provided with an extrusion end (4).

3. A double-head tensioning fixture for lathe machining according to claim 2, characterized in that: The extrusion end (4) is adapted to the inner hole (33) which is arranged at an angle.

4. The double-head tensioning fixture for lathe machining according to claim 1, characterized in that: The clamp core shaft (1) is provided with a support end (11) which is slidably connected to the expansion core (3) and supports the expansion core (3).

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