Split type elbow cutter bar for internal thread grinding

Abstract

The utility model discloses a split type elbow cutter bar for internal thread grinding. The split type elbow cutter bar comprises a cutter bar module, an elbow module, a transmission flexible shaft and a grinding module. Two ends of the elbow module are respectively connected with one end of the cutter bar module and the grinding module; the transmission flexible shaft sequentially penetrates through the cutter bar module, the elbow module and the grinding module; the grinding module is sleeved on the transmission flexible shaft; the other end of the cutter bar module is connected with an external power system, and the power system drives the transmission flexible shaft to rotate so as to drive the grinding module to rotate to grind internal threads of the nut. According to the split design, the overall rigidity is guaranteed, and the grinding stability and reliability are improved; stress is reduced, abrasion is reduced, and the service life is prolonged; the machining position and size are accurately controlled, and the machining precision and consistency are improved; vibration is dispersed, and the machining surface smoothness and size precision are improved; fault or worn modules can be replaced independently, maintenance cost is reduced, and use is flexible.

Description

Technical Field

[0001] The utility model relates to an internal thread grinding technology, in particular to a split elbow cutter bar for internal thread grinding. Background Art

[0002] In today's mechanical manufacturing industry, the processing of internal threads has always occupied an important position, and internal thread grinding technology is increasingly highlighting its unique advantages. This technology uses a grinding wheel to perform precision grinding on the workpiece, which can not only significantly improve the processing accuracy, but also effectively optimize the roughness of the workpiece surface, thereby enhancing the wear resistance of the workpiece and extending its service life. The internal thread grinding device in the existing technology generally adopts an integral structure for its tool bar design, which is relatively simple in structure. That is, the entire tool bar is composed of a single whole, with a grinding tool firmly installed on one end and the other end closely connected to the power system of the machine tool. The limitation of this integral design is that once the angle or position of the tool needs to be adjusted, the entire tool bar must be moved, which undoubtedly increases the complexity of the operation and also greatly restricts the flexibility of the machine tool. Summary of the Invention

[0003] According to an embodiment of the present utility model, a split elbow tool bar for internal thread grinding is provided, comprising: a tool bar module, an elbow module, a transmission flexible shaft and a grinding module;

[0004] The two ends of the elbow module are respectively connected to one end of the tool bar module and the grinding module;

[0005] The transmission flexible shaft passes through the tool bar module, elbow module and grinding module in sequence;

[0006] The grinding module is sleeved on the transmission flexible shaft;

[0007] The other end of the tool bar module is connected to an external power system, which drives the transmission flexible shaft to rotate, thereby driving the grinding module to rotate to grind the internal thread of the nut.

[0008] Furthermore, the tool bar module comprises: a tool bar body, a first mounting hole, a first bearing and a bearing cover;

[0009] One end of the tool bar body is connected to the elbow module;

[0010] The first mounting hole is provided in the cutter bar body and penetrates along the length direction of the cutter bar body, and the first mounting hole is used to mount the transmission flexible shaft;

[0011] The first bearing is arranged at the other end of the cutter bar body and sleeved on the transmission flexible shaft;

[0012] The bearing cover is fixed on the other end of the cutter bar body and is pressed and fixed on the first bearing.

[0013] Furthermore, the elbow module comprises: an internally ground elbow, a second mounting hole, an inclined slot and a second bearing;

[0014] One end of the internal grinding elbow is fixedly connected to one end of the tool bar module;

[0015] The inclined slot is opened at the other end of the internal grinding elbow, and the inclined slot is used to install the grinding module;

[0016] The second mounting hole is provided in the inner grinding elbow and is connected to the inclined groove, and the second mounting hole is used to mount the transmission flexible shaft;

[0017] The second bearing is arranged at one end of the inner grinding elbow and is sleeved on the transmission flexible shaft.

[0018] Furthermore, the internal grinding elbow is fixedly connected to the tool rod module by screws.

[0019] Furthermore, the elbow module further comprises: a pair of sealed bearings, a bearing locating sleeve and a pressing screw;

[0020] The bearing positioning sleeve is arranged in the inclined groove;

[0021] A pair of sealed bearings are arranged adjacent to each other and mounted in the chute via bearing locating sleeves, the sealed bearings supporting and sealing the grinding module;

[0022] The compression screws are fixed on the elbow module and compress and fix a pair of sealed bearings.

[0023] Further, the grinding module comprises: a mounting assembly and a grinding wheel;

[0024] The grinding wheel is fixed on the mounting assembly, and the grinding wheel grinds the internal thread of the nut;

[0025] The mounting assembly is installed on the elbow module and sleeved on the transmission flexible shaft. The mounting assembly is used to install the grinding wheel.

[0026] Further, the mounting assembly comprises: a grinding wheel fixing shaft and a locking nut;

[0027] The grinding wheel fixing shaft is arranged on the elbow module and sleeved on the transmission flexible shaft, and the grinding wheel fixing shaft is installed to fix the grinding wheel;

[0028] The locking nut is fixed on the transmission flexible shaft and the grinding wheel fixing shaft and is connected to the grinding wheel. The locking nut locks and fixes the grinding wheel.

[0029] According to the split elbow tool arbor for internal thread grinding according to the embodiment of the utility model, the split design ensures overall rigidity, improves grinding stability and reliability; reduces stress, reduces wear, and extends service life; accurately controls processing position and size, improves processing accuracy and consistency; disperses vibration, improves processing surface finish and dimensional accuracy; facilitates the separate replacement of faulty or worn modules, and reduces maintenance costs; by replacing the elbow module, it can adapt to the grinding needs of internal threads of different specifications and is flexible to use.

[0030] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the structure of a split elbow tool bar for internal thread grinding according to an embodiment of the utility model;

[0032] Figure 2 2 is a cross-sectional view of a split elbow tool arbor for internal thread grinding according to an embodiment of the present utility model;

[0033] Figure 3 for Figure 2 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to further illustrate the present invention.

[0035] First, combine Figures 1-3 The invention provides a split elbow tool bar for internal thread grinding according to an embodiment of the invention, which is used for grinding the internal threads of nuts and has a wide range of application scenarios.

[0036] like Figures 1-3 As shown, the split elbow tool bar for internal thread grinding according to an embodiment of the present invention comprises: a tool bar module 1, an elbow module 2, a transmission flexible shaft 3 and a grinding module 4.

[0037] Specifically, if Figures 1-3As shown, in this embodiment, the two ends of the elbow module 2 are respectively connected to one end of the tool rod module 1 and the grinding module 4; the transmission flexible shaft 3 passes through the tool rod module 1, the elbow module 2 and the grinding module 4 in sequence; the grinding module 4 is sleeved on the transmission flexible shaft 3; the other end of the tool rod module 1 is connected to the external power system, and the power system drives the transmission flexible shaft 3 to rotate, thereby driving the grinding module 4 to rotate to grind the internal thread of the nut 5. In this embodiment, unlike the previous method of setting the tool rod module 1 and the elbow module 2 as one body, the elbow module 2 and the tool rod module 1 are set separately. When a module fails or wears out, the module can be replaced alone without replacing the entire tool rod, thereby reducing maintenance costs; by replacing the elbow module 2, it can adapt to the grinding needs of internal threads of different specifications and shapes, and is more flexible to use; the tool rod with a split design can better ensure the overall rigidity, thereby providing higher stability and reliability during high-speed grinding; the split design reduces the force on a single part and reduces the possibility of wear, thereby extending the service life of the tooling; the split design can accurately control the processing position and size of the internal thread of the nut 5, thereby improving processing accuracy and consistency; the split setting can disperse vibration and improve the smoothness and dimensional accuracy of the processed surface.

[0038] Further, if Figures 1-3 As shown, in this embodiment, the tool bar module 1 includes: a tool bar body 11, a first mounting hole 12, a first bearing 13 and a bearing cover 14;

[0039] One end of the shank body 11 is connected to the elbow module 2, and the shank body 11 provides installation space for the first installation hole 12, the transmission flexible shaft 3 and the elbow module 2;

[0040] The first mounting hole 12 is provided in the cutter bar body 11 and penetrates along the length direction of the cutter bar body 11. The first mounting hole 12 is used to mount the transmission flexible shaft 3, providing a stable mounting path for the transmission flexible shaft 3.

[0041] The first bearing 13 is provided at the other end of the cutter bar body 11 and is sleeved on the transmission flexible shaft 3 to support and lubricate the transmission flexible shaft 3;

[0042] The bearing cover 14 is fixed to the other end of the arbor body 11 and is pressed and fixed on the first bearing 13 to enhance the fixation of the bearing, prevent the bearing from loosening or falling off during rotation, and protect the first bearing 13.

[0043] Further, if Figures 1-3 As shown, in this embodiment, the elbow module 2 includes: an inner grinding elbow 21, a second mounting hole 22, an inclined slot 23 and a second bearing 24;

[0044] One end of the internal grinding elbow 21 is fixedly connected to one end of the tool bar module 1 to ensure stability during the grinding process;

[0045] The inclined groove 23 is provided at the other end of the internal grinding elbow 21. The inclined groove 23 is used to install the grinding module 4. The inclined setting of the inclined groove 23 enables the grinding module 4 to be installed on the internal grinding elbow 21 at a certain angle, thereby adapting to the grinding requirements of different positions and angles. For example, it adapts to the helix angle of the internal thread so that the movement direction of the transmission flexible shaft 3 and the grinding wheel in the grinding module 4 is consistent with the direction represented by the helix angle of the internal thread, that is, the movement trajectory matches the helix line of the internal thread to avoid interference and collision.

[0046] The second mounting hole 22 is provided in the inner grinding elbow 21. The two ends of the second mounting hole 22 are respectively connected to the inclined groove 23 and the first mounting hole 12. The second mounting hole 22 is used to install the transmission flexible shaft 3 to ensure that the transmission flexible shaft 3 can smoothly pass through the inner grinding elbow 21 and transmit power to the grinding module 4.

[0047] The second bearing 24 is provided at one end of the inner grinding elbow 21 and sleeved on the transmission flexible shaft 3 to support and lubricate the transmission flexible shaft 3 .

[0048] Further, if Figures 1-3 As shown, in this embodiment, the internal grinding elbow 21 is fixedly connected to the tool bar module 1 by screws 25, and the connection is stable, easy to disassemble and assemble, highly adaptable, and easy to maintain.

[0049] Further, if Figures 1-3 As shown, in this embodiment, the elbow module 2 further includes: a pair of sealed bearings 26, a bearing positioning sleeve 27 and a pressing screw 28;

[0050] The bearing positioning sleeve 27 is arranged in the inclined groove 23 to realize the positioning and installation of a pair of sealed bearings 26;

[0051] A pair of sealed bearings 26 are disposed adjacent to each other and are mounted in the chute 23 via bearing locating sleeves 27 . The sealed bearings 26 support and seal the grinding module 4 .

[0052] The pressing screws 28 are fixed on the elbow module 2 and press and fix a pair of sealed bearings 26. Since the top surface of the sealed bearings 26 is flush with the inner grinding elbow 21, the pressing screws 28 can prevent the sealed bearings 26 from escaping from the inclined slot 23 during rotation.

[0053] Further, if Figures 1-3 As shown, in this embodiment, the grinding module 4 includes: a mounting assembly and a grinding wheel 41; the grinding wheel 41 is fixed to the mounting assembly, and the grinding wheel 41 grinds the internal thread of the nut 5; the mounting assembly is installed on the elbow module 2 and sleeved on the transmission flexible shaft 3, and the mounting assembly is used to install the grinding wheel 41. The mounting assembly includes: a grinding wheel fixing shaft 42 and a locking nut 43;

[0054] The grinding wheel fixing shaft 42 is provided on the elbow module 2 and sleeved on the transmission flexible shaft 3. The grinding wheel fixing shaft 42 is installed and fixed with the grinding wheel 41 to ensure the stability of the grinding wheel 41 during the grinding process. The grinding wheel fixing shaft 42 is passed through a pair of sealed bearings 26. A locking nut 43 is installed on the top of the grinding wheel fixing shaft 42, and a locking nut 44 is screwed on the bottom. The locking nut 44 supports and positions the pair of sealed bearings 26.

[0055] The locking nut 43 is fixed on the transmission flexible shaft 3 and the grinding wheel fixing shaft 42, and is connected to the grinding wheel 41. The locking nut 43 locks and fixes the grinding wheel 41 on the grinding wheel fixing shaft 42, which can ensure that the grinding wheel 41 will not loosen or fall off during high-speed rotation and grinding, further improving the stability of the grinding wheel 41. The locking nut 44 is connected to the transmission flexible shaft 3 by spot welding or glue dripping.

[0056] When in use, the entire elbow cutter bar is fixed to the external internal thread machine by screws 25. The clamp on the internal thread machine holds the input end of the transmission flexible shaft 3. The main shaft in the internal thread machine rotates, driving the transmission flexible shaft 3 to rotate. The transmission flexible shaft 3 then drives the grinding wheel 41 to rotate through the grinding wheel fixing shaft 42, thereby realizing the grinding process of the internal thread of the nut 5.

[0057] Above, refer to Figures 1-3 The present invention describes a split elbow tool arbor for internal thread grinding according to an embodiment of the present invention. The split design ensures overall rigidity, improves grinding stability and reliability; reduces stress, reduces wear, and extends service life; accurately controls processing position and size, improves processing accuracy and consistency; disperses vibration, improves processing surface finish and dimensional accuracy; facilitates separate replacement of faulty or worn modules, and reduces maintenance costs; and by replacing the elbow module, it can adapt to the grinding needs of internal threads of different specifications and is flexible to use.

[0058] It should be noted that, in this specification, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the elements.

[0059] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as limiting the present invention. After reading the above description, various modifications and alternatives to the present invention will be readily apparent to those skilled in the art. Therefore, the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A split elbow toolholder for internal thread grinding, characterized in that: Contains: tool bar module, elbow module, transmission flexible shaft and grinding module; The two ends of the elbow module are respectively connected to one end of the tool bar module and the grinding module; The transmission flexible shaft sequentially passes through the tool bar module, the elbow module and the grinding module; The grinding module is sleeved on the transmission flexible shaft; The other end of the tool bar module is connected to an external power system, and the power system drives the transmission flexible shaft to rotate, thereby driving the grinding module to rotate to grind the internal thread of the nut.

2. The split elbow toolholder for internal thread grinding according to claim 1, characterized in that: The tool bar module comprises: a tool bar body, a first mounting hole, a first bearing and a bearing cover; One end of the shank body is connected to the elbow module; The first mounting hole is provided in the knife bar body and penetrates along the length direction of the knife bar body, and the first mounting hole is used to mount the transmission flexible shaft; The first bearing is arranged at the other end of the cutter bar body and is sleeved on the transmission flexible shaft; The bearing cover is fixed to the other end of the shank body and is pressed and fixed on the first bearing.

3. The split elbow toolholder for internal thread grinding according to claim 1, characterized in that: The elbow module comprises: an internal grinding elbow, a second mounting hole, an inclined slot and a second bearing; One end of the internal grinding elbow is fixedly connected to one end of the tool bar module; The inclined groove is provided at the other end of the inner grinding elbow, and the inclined groove is used for installing the grinding module; The second mounting hole is provided in the inner grinding elbow and is connected to the inclined groove, and the second mounting hole is used to mount the transmission flexible shaft; The second bearing is arranged at one end of the inner grinding elbow and is sleeved on the transmission flexible shaft.

4. The split elbow toolholder for internal thread grinding according to claim 3, characterized in that: The internal grinding elbow is fixedly connected to the tool bar module via screws.

5. The split elbow tool bar for internal thread grinding according to claim 3 or 4, characterized in that: The elbow module further comprises: a pair of sealed bearings, a bearing positioning sleeve and a pressing screw; The bearing positioning sleeve is arranged in the inclined groove; The pair of sealed bearings are arranged adjacent to each other and are installed in the chute through the bearing positioning sleeve, and the sealed bearings support and seal the grinding module; The pressing screws are fixed on the elbow module and press and fix the pair of sealed bearings.

6. The split elbow toolholder for internal thread grinding according to claim 1, characterized in that: The grinding module comprises: a mounting assembly and a grinding wheel; The grinding wheel is fixed on the mounting assembly, and the grinding wheel grinds the internal thread of the nut; The mounting assembly is mounted on the elbow module and sleeved on the transmission flexible shaft. The mounting assembly is used to mount the grinding wheel.

7. The split elbow tool bar for internal thread grinding according to claim 6, characterized in that: The mounting assembly comprises: a grinding wheel fixing shaft and a locking nut; The grinding wheel fixing shaft is arranged on the elbow module and sleeved on the transmission flexible shaft, and the grinding wheel fixing shaft is installed and fixed to the grinding wheel; The locking nut is fixed on the transmission flexible shaft and the grinding wheel fixing shaft and is connected to the grinding wheel. The locking nut locks and fixes the grinding wheel.

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