Long hole internal thread grinding structure

Abstract

A grinding structure for internal threads in long holes includes a rotating shaft and a grinding unit mounted on the rotating shaft. The grinding unit has a thread grinding structure; the thread grinding structure is an external thread structure for grinding; or: the thread grinding structure consists of multiple thread cutting heads for grinding, with the multiple thread cutting heads arranged on a helix. In this application, the rotating shaft can be a rotating shaft on a milling machine or lathe. The thread grinding structure on the rotating shaft can match the internal threads on the workpiece. Therefore, during the grinding operation, the rotating shaft can extend axially into the hole, which is particularly suitable for internal thread grinding operations in deep and long holes without interference.

Description

Technical Field

[0001] This utility model belongs to the technical field of internal thread grinding structure, specifically relating to a grinding structure for internal threads in long holes. Background Technology

[0002] Internally threaded workpieces are a type of hardware widely used in the field of mechanical equipment. These workpieces are generally hollow tubular structures with internal threads on the inner wall of the inner hole. During the production process of internally threaded workpieces, the internal threads in the rough product need to be ground to improve the surface accuracy and overall quality of the internal threads.

[0003] In existing technology, the grinding of internal threads is generally performed using a grinding wheel, which is mounted on a spindle and inserted into the inner hole to grind the internal thread. The grinding wheel has a disc-shaped structure with no thread curvature on its outer circumference, while the internal thread has a helical curvature. Therefore, the grinding wheel needs to be tilted when entering the inner hole during grinding. This method is feasible for short holes, but not for long holes. If the tilted insertion is too deep, the tilted spindle will interfere with the workpiece, making the grinding operation impossible.

[0004] Therefore, this application has made further design and improvement to the grinding structure for internal threads in long holes. Utility Model Content

[0005] To address the shortcomings of the existing technology, this utility model provides a grinding structure for internal threads in long holes. It adopts a threaded grinding unit that can match the internal thread of the inner hole, allowing the rotating shaft to extend axially into the inner hole for grinding. It is especially suitable for grinding internal threads in long holes.

[0006] The present invention is solved by the following technical solution.

[0007] A grinding structure for internal threads in a long hole includes a rotating shaft and a grinding unit disposed on the rotating shaft. The grinding unit has a thread grinding structure. The thread grinding structure is an external thread structure for grinding. Alternatively, the thread grinding structure consists of multiple thread cutting heads for grinding, with the multiple thread cutting heads located on a helix.

[0008] In this application, the rotating shaft can be a rotating shaft on a milling machine or lathe. The rotating shaft is equipped with a thread grinding structure that can match the internal thread on the workpiece. Therefore, during the grinding operation, the rotating shaft can be axially inserted into the hole, which is especially suitable for internal thread grinding operations in deep and long holes without interference.

[0009] In a preferred embodiment, the thread grinding structure is a sleeve fixed to the rotating shaft, and the external thread structure for grinding is provided on the outer wall of the sleeve. In this structure, the sleeve can be detachably fixed to the rotating shaft by means of threaded assembly, interference fit, snap-fit, bolt assembly, etc., which facilitates replacement.

[0010] In a preferred embodiment, the thread grinding structure is a tool head unit fixed on a rotating shaft, and the radial outer wall of the tool head unit is provided with multiple thread cutting heads for grinding. In this structure, the tool head unit can be detachably fixed on the rotating shaft by means of threaded assembly, interference fit, snap-fit, bolt assembly, etc., which facilitates replacement.

[0011] In a preferred embodiment, the thread cutting tips are three evenly distributed.

[0012] Compared with the prior art, the present invention has the following advantages: it provides a grinding structure for internal threads in long holes, which adopts a threaded grinding unit that can match the internal thread of the inner hole, so that the rotating shaft can be axially inserted into the inner hole for grinding, and is especially suitable for grinding internal threads in long holes. Attached Figure Description

[0013] Figure 1 This is a perspective view of the grinding structure in Embodiment 1 of this utility model.

[0014] Figure 2 This is a cross-sectional view of the grinding structure in Embodiment 1 of this utility model.

[0015] Figure 3 This is a front view of the sleeve in Embodiment 1 of this utility model.

[0016] Figure 4 This is a perspective view of the sleeve in Embodiment 1 of this utility model.

[0017] Figure 5 This is a cross-sectional view of the sleeve in Embodiment 1 of this utility model.

[0018] Figure 6 This is a perspective view of the grinding structure in Embodiment 2 of this utility model.

[0019] Figure 7 This is a cross-sectional view of the grinding structure in Embodiment 2 of this utility model.

[0020] Figure 8 This is a schematic diagram of the end face of the grinding structure in Embodiment 2 of this utility model.

[0021] Figure 9 This is a perspective view of the cutter head unit in Embodiment 2 of this utility model.

[0022] Figure 10 This is an end view of the cutter head unit in Embodiment 2 of this utility model. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] In the following embodiments, the same or similar reference numerals denote the same or similar originals or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of this utility model, it should be understood that the terms such as center, longitudinal, transverse, length, width, thickness, upper, lower, front, back, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, and counterclockwise, indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features shown. In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] See Figures 1 to 10 The present application relates to a long hole internal thread grinding structure, including a rotating shaft 3 and a grinding unit disposed on the rotating shaft 3, wherein the grinding unit has a thread grinding structure; the thread grinding structure is an external thread structure 21 for grinding; or: the thread grinding structure is a plurality of thread cutting heads 41 for grinding, the plurality of thread cutting heads 41 being located on a helix.

[0027] Appendix Figure 1 To be continued Figure 5 This is an embodiment of the present application, and the rotating shaft is omitted in the figure. In embodiment one, the thread grinding structure is a sleeve 2 fixed on the rotating shaft 3, and the external thread structure 21 for grinding is provided on the outer wall of the sleeve 2. In this structure, the sleeve 2 can be detachably fixed on the rotating shaft 3 by means of threaded assembly, interference fit, snap-fit, bolt assembly, etc., which facilitates replacement.

[0028] Appendix Figure 6 To be continued Figure 10In this second embodiment of the present application, the thread grinding structure is a tool head unit 4 fixed on a rotating shaft 3, and the radial outer wall of the tool head unit 4 is provided with a plurality of thread cutting heads 41 for grinding. In this structure, the tool head unit 4 can be detachably fixed on the rotating shaft 3 by means of threaded assembly, interference fit, snap-fit, bolt assembly, etc., for easy replacement. Preferably, there are three thread cutting heads 41 evenly distributed.

[0029] In the above embodiments, the rotating shaft 3 can be a rotating shaft on a milling machine or lathe. The rotating shaft 3 is provided with a thread grinding structure, which can match the internal thread on the workpiece. Therefore, during the grinding operation, the rotating shaft 3 can be axially inserted into the hole, which is especially suitable for the internal thread grinding operation in deep and long holes without interference.

[0030] As described above, this utility model provides a grinding structure for internal threads in long holes. It adopts a threaded grinding unit that can match the internal thread of the inner hole, allowing the rotating shaft to extend axially into the inner hole for grinding. It is especially suitable for grinding internal threads in long holes.

[0031] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. A long hole internal thread grinding structure comprising a spindle (3) and a grinding unit provided on the spindle (3), characterized in that, The grinding unit is provided with a threaded grinding structure; The threaded grinding structure is an external threaded structure (21) for grinding; Or: The threaded grinding structure is a plurality of threaded tool bits (41) for grinding, and the plurality of threaded tool bits (41) are on a helix.

2. A long-pitch internal thread grinding structure according to claim 1, wherein The threaded grinding structure is a sleeve (2) fixed on the rotating shaft (3), and the external threaded structure (21) for grinding is arranged on the outer wall of the sleeve (2).

3. A long hole internal thread grinding structure according to claim 1, wherein The threaded grinding structure is a tool bit unit (4) fixed on the rotating shaft (3), and a plurality of threaded tool bits (41) for grinding are arranged on the radial outer wall of the tool bit unit (4).

4. A long hole internal thread grinding structure according to claim 3, wherein The threaded tool bits (41) are three uniformly distributed.

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