A resilient tap shank

Abstract

The utility model relates to mechanical processing technical field especially relates to a kind of elastic tap handle;Including handle main body, with the chuck main body of one end connection of handle main body, the knife bar of limit setting in the other end of handle main body;Wherein the axial insertion slot of handle main body is set, the disc spring of the bottom portion in the insertion slot is set with the end face contact of knife bar;The positioning hole of limiting the knife bar is set in the radial direction of handle main body, the cylindrical pin corresponding with the positioning hole is set on the knife bar, and the outer diameter of cylindrical pin is less than the inner diameter of positioning hole.The product design in the utility model can completely solve the defects of existing handle, avoid tap breaking phenomenon, ensure the size of work difference, so as to improve the processing efficiency, perfect product precision can be guaranteed, and processing cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to an elastic tap holder. Background Technology

[0002] A conventional flexible tap holder is a clamping tool used for tapping. Its core design purpose is to solve problems such as tap breakage and poor thread quality caused by axial force fluctuations or different axialities during tapping, which are common with traditional rigid tap holders. Currently, the flexible function of the tap holder is achieved through the elastic deformation of the rubber after it engages with a cylindrical pin. However, due to prolonged use and immersion in coolant, the rubber may fail to deform, easily leading to tap breakage during use. Utility Model Content

[0003] The purpose of this invention is to provide an elastic tap holder to solve the problem of how to avoid the easy breakage of conventional taps.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This utility model provides an elastic tap holder, including a holder body, a chuck body connected to one end of the holder body, and a shank that is limited and disposed at the other end of the holder body; The tool holder body has an axial insertion groove, and a disc spring that contacts the end face of the tool bar is provided at the bottom of the insertion groove; a positioning hole for limiting the tool bar is provided in the radial direction of the tool holder body, and a cylindrical pin corresponding to the positioning hole is provided on the tool bar, the outer diameter of the cylindrical pin being smaller than the inner diameter of the positioning hole.

[0005] In this embodiment, a copper sleeve is provided in the positioning hole, and the cylindrical pin is inserted into the copper sleeve, with an axial gap reserved between the cylindrical pin and the copper sleeve.

[0006] Furthermore, in this embodiment, three disc springs are provided at the bottom of the tool holder to ensure a compression of 0.1mm-0.2mm during assembly.

[0007] Compared with the prior art, the beneficial technical effects of this utility model are as follows: This invention completely solves the defects of existing tool holders, avoids tap breakage, and ensures dimensional tolerances, thereby improving processing efficiency while perfectly guaranteeing product accuracy and reducing processing costs. Attached Figure Description

[0008] The present invention will be further described below with reference to the accompanying drawings.

[0009] Figure 1 This is a schematic diagram of the elastic tap holder of this utility model.

[0010] Explanation of reference numerals in the attached drawings: 1. Cylindrical pin; 2. Copper sleeve; 3. Disc spring; 4. Tool holder; 5. Tool shank body; 6. Chuck body. Detailed Implementation

[0011] refer to Figure 1 This embodiment discloses an elastic tap holder, including a holder body 5, a collet body 6 connected to one end of the holder body 5, and a shank 4 that is limited and inserted into the other end of the holder body 5; wherein the holder body 5 has an axial insertion groove, and a disc spring 3 that contacts the end face of the shank 4 is installed at the bottom of the insertion groove; a positioning hole for limiting the shank 4 is provided in the radial direction of the holder body 5, and a cylindrical pin 1 corresponding to the positioning hole is installed on the shank 4, wherein the outer diameter of the cylindrical pin 1 is smaller than the inner diameter of the positioning hole.

[0012] In the prior art, the original tool holder (in) Figure 1 The original position of disc spring 3 was rubber.

[0013] In this embodiment, a copper sleeve 2 is installed in the positioning hole, and a cylindrical pin 1 is inserted into the copper sleeve 2. A gap is reserved axially between the cylindrical pin 1 and the copper sleeve 2, specifically designed to be a gap of 0.3mm.

[0014] In this embodiment, three disc springs are installed at the bottom of the tool holder 4 to ensure a compression of 0.1mm-0.2mm during assembly.

[0015] The maximum compression of the single disc spring is 0.26mm. During assembly, the compression is maintained at 0.1mm-0.2mm. At the same time, the axial clearance between the 1 cylindrical pin and the 2 copper sleeves is maintained at 0.3mm. In this way, during tapping, even if the 0.3mm clearance becomes 0, the compression will still be between 0.4mm-0.5mm. When not machining, the tool holder 4 returns to its original position by deforming the disc spring.

[0016] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A flexible tap holder, characterized in that: It includes a handle body (5), a collet body (6) connected to one end of the handle body (5), and a bar (4) that is limited at the other end of the handle body (5). The tool holder body (5) has an axial insertion groove, and a disc spring (3) is provided at the bottom of the insertion groove to contact the end face of the tool bar (4); a positioning hole for limiting the tool bar (4) is provided in the radial direction of the tool holder body (5), and a cylindrical pin (1) corresponding to the positioning hole is provided on the tool bar (4), the outer diameter of the cylindrical pin (1) being smaller than the inner diameter of the positioning hole.

2. The elastic tap holder according to claim 1, characterized in that: A copper sleeve (2) is provided in the positioning hole, and a cylindrical pin (1) is inserted into the copper sleeve (2). A gap is reserved axially between the cylindrical pin (1) and the copper sleeve (2).

3. The elastic tap holder according to claim 1, characterized in that: The bottom of the tool holder (4) is provided with three disc springs to ensure a compression of 0.1mm-0.2mm during assembly.

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