A clamping tool for tubular workpieces

Abstract

The present invention discloses a tubular workpiece clamping tool, including: a core shaft and an outer support claw, three long slide grooves are evenly arranged on the outer wall of the core shaft, the three long slide grooves are parallel to the axis of the core shaft, and three long support claws are arranged on the outer support claws respectively corresponding to the long slide grooves. The outer support claws are slidably sleeved from one end of the core shaft to the outside of the core shaft through the long support claws, and the outer support claws are used to tighten the tubular workpiece from the inner hole of the tubular workpiece. When used, the outer support claws need to be sleeved on the core shaft first, and then the tubular workpiece is sleeved on the outside of the outer support claws. The outer support claws can be tightened on the core shaft from the inside of the tubular workpiece, and one end of the core shaft is fixed on the chuck on the lathe, so that the outer circle, two end faces and step surface of the tubular workpiece can be processed, wherein the above processing only needs one clamping to be realized, so the clamping tool can effectively improve the processing efficiency, and in addition, the core shaft can effectively provide support to the tubular workpiece to prevent its deformation, so the processing accuracy can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of clamps, and in particular to a tubular workpiece clamping tool. Background Art

[0002] The clamping of tubular workpieces is currently mainly carried out through chucks or double centers. Chuck clamping can only realize the processing of one end of the workpiece in one clamping. When the other end needs to be processed, the workpiece needs to be removed and then turned around for clamping. Not only is the work efficiency low, but the chuck is prone to cause deformation of the tubular workpiece, thereby affecting the concentricity and parallelism of the two ends, and further affecting the processing accuracy of the entire product. In addition, the double center is also difficult to ensure that the tubular workpiece has a high load-bearing capacity during processing, that is, the double center is also prone to cause deformation of the workpiece.

[0003] Therefore, how to provide a tubular workpiece clamping fixture to improve the processing efficiency and processing accuracy of the tubular workpiece is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a tubular workpiece clamping tool that can effectively improve processing efficiency and processing accuracy.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A tubular workpiece clamping tool comprises: a core shaft and an outer support claw, wherein three long slide grooves are evenly arranged on the outer side wall of the core shaft, and the three long slide grooves are parallel to the axis of the core shaft; the outer support claw is provided with three long support claws corresponding to the long slide grooves respectively; the outer support claw is slidably sleeved on the outside of the core shaft from one end of the core shaft through the long support claw, and the outer support claw is used to tighten the tubular workpiece from the inner hole of the tubular workpiece.

[0007] Preferably, the end of the long supporting claw is provided with an inclined surface, and the long sliding groove is provided with a guide surface for the end of the long supporting claw to slide out.

[0008] Preferably, grooves are provided on the inner and outer sides of a section of the end of the long supporting claw close to the inclined surface thereof, and the grooves are perpendicular to the length extension direction of the long supporting claw.

[0009] Preferably, a short support claw is further provided on the outer support claw between two adjacent long support claws, the short support claw and the long support claw are arranged parallel to each other, and a short slide groove for accommodating the short support claw is further provided on the core shaft.

[0010] Preferably, an elastic member is provided between the end of the core shaft and the inner top of the outer supporting claw.

[0011] Preferably, the end of the core shaft is provided with a screw rod penetrating the end of the outer support claw, the elastic member is sleeved on the screw rod, a nut is provided on the screw rod, and the nut is located at the outer top of the outer support claw.

[0012] Compared with the prior art, the above technical solution has the following advantages:

[0013] The present invention provides a tubular workpiece clamping tool, including: a core shaft and an outer support claw, three long slide grooves are evenly arranged on the outer wall of the core shaft, the three long slide grooves are parallel to the axis of the core shaft, and three long support claws are arranged on the outer support claws, which correspond to the long slide grooves respectively. The outer support claws are slidably sleeved from one end of the core shaft to the outside of the core shaft through the long support claws, and the outer support claws are used to tighten the tubular workpiece from the inner hole of the tubular workpiece. When used, the outer support claws need to be sleeved on the core shaft first, and then the tubular workpiece is sleeved on the outside of the outer support claws. The outer support claws can be tightened on the core shaft from the inside of the tubular workpiece, and one end of the core shaft is fixed on the chuck on the lathe, so that the outer circle, two end faces and step surface of the tubular workpiece can be processed, wherein the above processing only needs one clamping to be realized, so the clamping tool can effectively improve the processing efficiency, and in addition, the core shaft can effectively provide support to the tubular workpiece to prevent its deformation, so the processing accuracy can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0015] Figure 1 The present invention is a schematic structural diagram of a tubular workpiece clamping tool provided in a specific embodiment of the present invention.

[0016] The reference numerals are as follows:

[0017] 1 is a screw, 2 is a top, 3 is a nut, 4 is a telescopic spring, 5 is a long support claw, 6 is a core shaft, 7 is a groove, and 8 is a short support claw. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Please refer to Figure 1 , Figure 1 The present invention is a schematic structural diagram of a tubular workpiece clamping tool provided in a specific embodiment of the present invention.

[0020] A tubular workpiece clamping tool provided in an embodiment of the present invention comprises: a core shaft 6 and an outer support claw, three long slide grooves are evenly arranged on the outer side wall of the core shaft 6, the three long slide grooves are parallel to the axis of the core shaft 6, and three long support claws 5 are arranged on the outer support claw, which respectively correspond to the long slide grooves, that is, the outer support claw is a three-claw structure, and the outer support claw is slidably sleeved from one end of the core shaft 6 to the outside of the core shaft 6 through the long support claw 5, that is, the long slide groove is a structure open toward one end of the core shaft 6, and the outer support claw is used to tighten the tubular workpiece from the inner hole of the tubular workpiece. When in use, the outer support claws must first be sleeved on the core shaft 6, and then the tubular workpiece must be sleeved on the outside of the outer support claws. The outer support claws can be tightened on the core shaft 6 from the inside of the tubular workpiece. One end of the core shaft 6 is fixed to the chuck on the lathe, and the other end is tightened through the center 2. The outer circle, two end faces and step surface of the tubular workpiece can be processed. The above processing only requires one clamping to achieve, so the clamping tool can effectively improve the processing efficiency. In addition, the core shaft 6 can effectively support the tubular workpiece to prevent its deformation, thereby improving the processing accuracy.

[0021] Specifically, a sloped surface is provided at the end of the long support claw 5, and a guide surface is provided in the long slide groove for the end of the long support claw 5 to slide out. As the long support claw 5 moves axially in the long slide groove, under the action of the sloped surface and the guide surface, the long support claw 5 will perform a composite axial and radial displacement, so that the end of the long support claw 5 extends out of the long slide groove to tighten the tubular workpiece. Therefore, the sloped surface and the guide surface can make the tooling suitable for tubular workpieces with different inner diameters.

[0022] Furthermore, grooves 7 are provided on the inner and outer sides of the section near the inclined surface at the end of the long support claw 5, and the grooves 7 are perpendicular to the length extension direction of the long support claw 5, that is, when the long support claw 5 is tightening the tubular workpiece, it has a certain deformation under the action of the grooves 7 to ensure that the outer side surface of the long support claw 5 can contact the inner wall of the tubular workpiece to the maximum extent, thereby ensuring the tightening effect of the long support claw 5.

[0023] Furthermore, a short support claw 8 is provided on the outer support claw between the two adjacent long support claws 5. The short support claw 8 and the long support claw 5 are arranged parallel to each other. A short slide groove for accommodating the short support claw 8 is also provided on the core shaft 6. Through the mutual cooperation of the long support claw 5 and the short support claw 8, the two ends of the tubular workpiece can be tightened at the same time to ensure the support accuracy of the tubular workpiece.

[0024] In order to facilitate the disassembly of the tubular workpiece, in the present embodiment, an elastic member is provided between the end of the core shaft 6 and the inner top of the outer support claw, that is, after the tubular workpiece is processed, the outer support claw can be moved in an axial direction toward the outside through the elastic member, so as to reduce the external support force of the outer support claw on the tubular workpiece, thereby facilitating the disassembly of the tubular workpiece.

[0025] Specifically, the end of the mandrel 6 is provided with a screw 1 that passes through the end of the outer claw, and an elastic member is sleeved on the screw 1, wherein the elastic member is preferably a telescopic spring 4, and a nut 3 is provided on the screw 1, and the nut 3 is located at the outer top of the outer claw. By screwing the nut 3, the length of the telescopic spring 4 can be controlled, and then the magnitude of the elastic force can be controlled. When the workpiece needs to be disassembled, the nut 3 can be screwed outward, and the spring will press against the inner top of the outer claw, thereby controlling the outer claw to move outward to release the external support force, thereby facilitating the disassembly of the tubular workpiece.

[0026] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0027] The above is a detailed introduction to a tubular workpiece clamping tool provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A tubular workpiece clamping tool, characterized in that: include: The outer wall of the mandrel is provided with three long slide grooves, the three long slide grooves are parallel to the axis of the mandrel, and the outer claw is provided with three long claws corresponding to the long slide grooves respectively. The outer claw is slidably sleeved on the outside of the mandrel from one end of the mandrel through the long claw. The outer claw is used to tighten the tubular workpiece from the inner hole of the tubular workpiece when it is used. When it is used, the outer claw needs to be sleeved on the mandrel first, and then the tubular workpiece is sleeved on the outside of the outer claw. The outer claw tightens on the mandrel from the inside of the tubular workpiece, one end of the mandrel is fixed to the chuck on the lathe, and the other end is tightened by the top. The end of the long claw is provided with an inclined surface, and the long slide groove is provided with a guide surface for the end of the long claw to slide out. As the long claw moves axially in the long slide groove, under the action of the inclined surface and the guide surface, the long claw will The cam is configured to move the end of the long support claw toward the inner wall of the groove, and the end of the long support claw is configured to move the end of the long support claw toward the inner wall of the groove.

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