Cutter bar tool for internal thread machining

Abstract

The utility model discloses a cutter bar tool for internal thread machining. The cutter bar tool comprises a cutter bar 1, a cutter bar fixing frame 2, a cutter sleeve 4 and a cutter 5. The cutter bar 1 comprises a bar body 101, a clamping part 102 arranged at the rear end of the bar body 101 and a bar head 103 arranged at the front end of the bar body 101; the cutter bar fixing frame 2 is fixed on the horizontal lathe 8 and is used for clamping and fixing the clamping part 102 at the rear end of the cutter bar 1; the cutter sleeve 4 comprises a connecting plate 401 arranged at the bottom of the rod head 103 and an arc-shaped plate 402 fixedly arranged at the bottom of the connecting plate 401, the radian of the arc-shaped plate 402 is matched with the inner ring of the main nut 7, and the arc-shaped plate 402 is attached to the inner ring of the main nut 7 to support the rod head 103 at the front end of the cutter rod 1. The cutter 5 is vertically arranged on the outer side of the rod head 103, and internal threads are machined on the inner ring of the main nut 7. According to the cutter bar tool, the cutter sleeve 4 is fixed to the front end of the cutter bar 1 to serve as a support, deformation and vibration of the cutter bar 1 can be effectively reduced when internal threads are machined, and the size precision and the surface quality of the internal threads of a main nut are guaranteed.

Description

Technical Field

[0001] The embodiments of the present utility model belong to the technical field of lathe machining tools, and more specifically, relate to a tooling for a tool shank used for internal thread machining. Background Art

[0002] The screw pair of a screw press includes a main screw and a main nut, which has both the functions of transmission and force transmission. The quality of its working performance directly affects the working quality of the screw press. To ensure the stability of the transmission of the screw pair, the machining of the internal thread of the main nut must ensure dimensional accuracy and surface quality. When machining the internal thread of the main nut on a lathe, a tool shank needs to be made according to the thread size. The length of the main nut increases with the increase of the tonnage of the press, and the corresponding length of the tool shank for machining also needs to be increased.

[0003] At present, there is no support at the front end of the tool shank in use. After being lengthened, there will be a problem of insufficient stiffness of the tool shank body, and deformation and vibration will occur during the machining process, resulting in the dimensional accuracy, shape and surface quality of the internal thread of the main nut not meeting the design requirements.

[0004] Therefore, at the present stage, there is an urgent need for a tooling for a tool shank used for internal thread machining, which can effectively reduce the deformation and vibration of the tool shank during the machining of the internal thread and ensure the dimensional accuracy and surface quality of the internal thread of the main nut. Summary of the Invention

[0005] Aiming at the problems of insufficient stiffness after the lengthening of the tool shank for internal thread machining in the prior art and deformation and vibration occurring during the machining process, the present utility model provides a tooling for a tool shank used for internal thread machining to solve such problems.

[0006] To achieve the above object, the present utility model provides a tooling for a tool shank used for internal thread machining, including a tool shank, which includes a shank body, a clamping portion provided at the rear end of the shank body, and a tool head provided at the front end of the shank body; a tool shank fixing bracket for clamping and fixing the clamping portion at the rear end of the tool shank; a tool vertically provided outside the tool head; and a tool sleeve slidably connected to the front end of the tool shank, which includes a connecting plate provided at the bottom of the tool head and an arc plate fixedly provided at the bottom of the connecting plate. The arc of the arc plate is adapted to the inner circle of the main nut and fits on the inner circle of the main nut to support the tool head at the front end of the tool shank.

[0007] Further, a guide groove is opened on the connecting plate, and the guide groove communicates with a T-shaped notch opened on one side of the top of the arc plate.

[0008] Further, a T-shaped guide block is fixedly provided at the bottom of the tool head, which slides into the tool sleeve from the T-shaped notch and slides and is limited along the guide groove, realizing the sliding connection between the tool head and the tool sleeve.

[0009] Further, a tool clamping cavity is formed on the outer side of the rod head. The size of the tool clamping cavity is adapted to the tool. After the tool is placed in the tool clamping cavity, a locking bolt is used to press and fix it.

[0010] Further, a tool bar stabilizing block is vertically and fixedly arranged on the inner side of the rod head. The bottom of the tool bar stabilizing block contacts the top of the tool sleeve to limit the tool sleeve and prevent the main nut from driving the tool sleeve to rotate.

[0011] Further, a tool bar clamping cavity is arranged at the top of the tool bar fixing frame and cooperates with the locking bolt to clamp and fix the clamping part at the end of the tool bar.

[0012] Further, a tool bar cushion block is fixedly arranged on the side of the rod body. The overall rod diameter of the fixed connection section between the two is the same as the rod diameter of the clamping part, so as to adapt to the tool bar clamping cavity; the tool bar cushion block and the rod body are pressed and fixed in the tool bar clamping cavity through a locking bolt, so as to adjust the overall length of the tool bar to adapt to the processing of the internal threads of the main nuts with different depths.

[0013] Generally speaking, compared with the prior art by the above technical solution conceived by the present utility model, the following beneficial effects can be achieved:

[0014] (1) For the tool bar tooling of the present utility model, by using the tool sleeve fixed at the front end of the tool bar as a support, the deformation and vibration of the tool bar can be effectively reduced during the processing of the internal thread, and the dimensional accuracy and surface quality of the internal thread of the main nut can be guaranteed; after the tool bar is supported by the tool sleeve, the requirement for stiffness can be reduced, and the tool bar can be appropriately lightened to save costs and facilitate installation during use.

[0015] (2) For the tool bar tooling of the present utility model, the tool bar cushion block installed on the side of the tool bar and the tool bar stabilizing block installed on the inner side of the tool bar are both detachable parts and can be selected and installed according to different main nut sizes; the tool bar cushion block can adjust the fixed position of the tool bar on the tool bar fixing frame to be compatible with the processing of more different models of main nuts; the tool bar stabilizing block can lengthen the mating plane of the tool bar on the upper surface of the tool sleeve to prevent the tool sleeve from rotating during processing.

[0016] (3) For the tool bar tooling of the present utility model, the tool sleeve at the front end of the tool bar is a replaceable part. When processing different models of main nuts, tool sleeves with corresponding outer shapes can be used according to the corresponding internal thread sizes, and the replacement is simple and fast.

[0017] (4) For the tool bar tooling of the present utility model, a T-shaped guide block is used to connect and guide between the tool bar and the tool sleeve. There is a gap between the T-shaped guide block and the tool sleeve, so that the tool bar can slide on the tool sleeve along the feed and retraction direction, and the tool can be aligned with the starting processing point of the internal thread of the main nut for processing operations, so that this tooling can be applicable to ordinary and CNC horizontal lathes. Description of the Drawings

[0018] Figure 1 Schematic diagram of a tool holder tooling for internal thread processing in an embodiment of the present utility model;

[0019] Figure 2 Schematic diagram of the tool holder in an embodiment of the present utility model;

[0020] Figure 3 Schematic diagram of the tool holder fixing bracket in an embodiment of the present utility model;

[0021] Figure 4 Schematic diagram of the connection structure between the cutting tool and the tool holder in an embodiment of the present utility model;

[0022] Figure 5 Schematic diagram of the connection structure between the tool sleeve and the tool holder in an embodiment of the present utility model;

[0023] Figure 6 Schematic diagram of the tool sleeve in an embodiment of the present utility model;

[0024] Figure 7 Schematic diagram of the tool sleeve supporting the tool holder in an embodiment of the present utility model.

[0025] In all the drawings, the same reference numerals represent the same technical features, specifically: 1 - tool holder, 101 - rod body, 102 - clamping portion, 103 - rod head, 104 - tool clamping cavity, 2 - tool holder fixing bracket, 201 - tool holder clamping cavity, 3 - tool holder spacer block, 4 - tool sleeve, 401 - connecting plate, 402 - arc plate, 403 - T-shaped notch, 5 - cutting tool, 6 - tool holder stabilizing block, 7 - main nut, 8 - horizontal lathe, 9 - T-shaped guide block. Specific embodiments

[0026] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] Such as Figures 1-7As shown in the figure, the utility model provides a tooling for internal thread machining, which includes a tool shank 1, a tool shank fixing bracket 2, a tool sleeve 4 and a cutting tool 5. The tool shank 1 includes a shank body 101, a clamping portion 102 provided at the rear end of the shank body 101, and a shank head 103 provided at the front end of the shank body 101; the tool shank fixing bracket 2 is fixed on a horizontal lathe 8 to clamp and fix the clamping portion 102 at the rear end of the tool shank 1; the tool sleeve 4 includes a connecting plate 401 provided at the bottom of the shank head 103, and an arc plate 402 fixedly provided at the bottom of the connecting plate 401. The arc of the arc plate 402 is adapted to the inner circle of the main nut 7 and fits on the inner circle of the main nut 7 to support the shank head 103 at the front end of the tool shank 1. The cutting tool 5 is vertically provided outside the shank head 103 to machine an internal thread on the inner circle of the main nut 7. The tooling of the tool shank of the utility model can effectively reduce the deformation and vibration of the tool shank 1 during internal thread machining by using the tool sleeve 4 fixed at the front end of the tool shank 1 as a support, and ensure the dimensional accuracy and surface quality of the internal thread of the main nut.

[0028] As Figure 2 shown, in the embodiment of the utility model, the tool shank 1 includes a shank body 101, a clamping portion 102 provided at the rear end of the shank body 101, and a shank head 103 provided at the front end of the shank body 101; wherein, the length of the shank body 101 is adapted to the thread depth of the main nut 7, and the cutting tool 5 can be pushed into the inner circle of the main nut 7 to turn out the thread; further, the diameter of the shank body 101 is smaller than the diameter of the clamping portion 102. While reducing the overall weight of the tool shank 1, the smaller diameter of the shank body 101 can be adapted to the processing operations of main nuts 7 with various inner diameters. The clamping portion 102 is fixed to the tool shank fixing bracket 2 by a locking bolt to keep the tool shank 1 stable. The shank head 103 is used to load and fix the cutting tool 5, and a tool clamping cavity 104 is opened on its outer side. The size of the tool clamping cavity 104 is adapted to the cutting tool 5. After the cutting tool 5 is placed in the tool clamping cavity 104, it is fixed by a locking bolt.

[0029] To adapt to the machining of main nuts 7 with different thread depths, a tool shank spacer 3 is fixedly provided on the side of the shank body 101 to adjust the overall length of the tool shank 1, and avoid deformation and vibration caused by the overlong tool shank 1. The tool shank spacer 3 is threadedly connected to the corresponding positioning screw holes on the outer side of the shank body 101 through bolts, so as to fix the tool shank spacer 3 at the corresponding position on the outer side of the shank body 101, and make the overall diameter of the tool shank spacer 3 and the shank body 101 the same as the diameter of the clamping portion 102, which can be adapted to the tool shank clamping cavity 201 of the tool shank fixing bracket 2. The tool shank spacer 3 and the shank body 101 are pressed and fixed in the tool shank clamping cavity 201 through a locking bolt, so as to achieve the purpose of adjusting the overall length of the tool shank 1.

[0030] As Figure 3As shown in the figure, a tool shank clamping cavity 201 is provided at the top of the tool shank fixing bracket 2, which cooperates with a locking bolt to clamp and fix the clamping portion 102 at the end of the tool shank 1. The tool shank fixing bracket 2 is fixedly arranged on the ram of the horizontal lathe 8. By the axial and longitudinal movement of the ram, the tool shank 1 can be driven to align with the inner ring of the main nut 7 for processing operations: by adjusting the fixing height of the tool shank 1 on the tool shank fixing bracket 2, the tip of the cutting tool 5 is aligned with the axes of the horizontal lathe 8 and the main nut 7. By axially sliding the ram of the horizontal lathe 8, the tool sleeve 4 is inserted into the main nut 7, and then by longitudinally sliding the ram of the horizontal lathe 8, the cutting tool 5 can be aligned with the starting point of the internal thread of the main nut 7.

[0031] As Figures 4-7 shown, in the embodiment of the present utility model, by slidably arranging a tool sleeve 4 at the bottom of the rod head 103 and making the tool sleeve 4 contact with the inner ring of the main nut 7 to support the rod head 103, the deformation and vibration of the tool shank 1 can be effectively reduced. The tool sleeve 4 includes a connecting plate 401, an arc plate 402 and a T-shaped notch 403; the connecting plate 401 is located at the bottom of the rod head 103, and a guide groove is opened thereon; the top of the arc plate 402 is fixedly connected to the bottom of the connecting plate 401; the T-shaped notch 403 is arranged on one side of the top of the arc plate 402 and communicates with the guide groove. By sliding the T-shaped guide block 9 fixedly arranged at the bottom of the rod head 103 into the T-shaped notch 403 and limiting the sliding along the guide groove, the sliding connection between the rod head 103 and the tool sleeve 4 is realized.

[0032] In the embodiment of the present utility model, the tool sleeve 4 can be replaced according to the inner diameter of the main nut 7, so that the radian of the arc plate 402 is adapted to the inner diameter of the main nut 7, ensuring that the arc plate 402 fits with the inner ring of the main nut 7, thereby supporting the rod head 103 and effectively reducing the deformation and vibration of the tool shank 1.

[0033] Furthermore, when the inner diameter of the main nut 7 is too large and the tool shank 1 deflects to one side during operation, and the tool sleeve 4 cannot be flattened, resulting in the main nut 7 driving the tool sleeve 4 to rotate and the deformation and vibration of the tool shank 1 not being effectively reduced. To avoid this situation, a tool shank stabilizing block 6 is vertically and fixedly arranged inside the rod head 103. The bottom of the tool shank stabilizing block 6 contacts the top of the tool sleeve 4 to limit the tool sleeve 4, and the mating plane of the tool shank 1 on the upper surface of the tool sleeve 4 is lengthened, which can effectively prevent the main nut 7 from driving the tool sleeve 4 to rotate, keep the tool sleeve 4 stationary, and ensure the stable operation of the tool shank 1.

[0034] When the tool shank tooling of the present utility model is operating, the tool shank 1 is fixed on the tool shank fixing bracket 2. By adjusting the fixing height of the tool shank 1 on the tool shank fixing bracket 2, the tip of the cutting tool 5 is aligned with the axes of the horizontal lathe 8 and the main nut 7. By longitudinally sliding the ram of the horizontal lathe 8, the T-shaped guide block 9 at the bottom of the rod head 103 slides into the T-shaped notch 403. Then, by axially sliding the ram of the horizontal lathe 8, the tool sleeve 4 is inserted into the main nut 7. Then, by longitudinally sliding the ram of the horizontal lathe 8, the T-shaped guide block 9 at the bottom of the rod head 103 slides along the guide groove with limited position, realizing the sliding connection between the rod head 103 and the tool sleeve 4, and enabling the cutting tool 5 to be aligned with the starting machining point of the internal thread of the main nut 7 for machining operations.

[0035] For the tool shank tooling of the present utility model, by using the tool sleeve 4 fixed at the front end of the tool shank 1 as a support, the deformation and vibration of the tool shank 1 can be effectively reduced during the machining of internal threads, ensuring the dimensional accuracy and surface quality of the internal thread of the main nut 7; after the tool shank 1 is supported by the tool sleeve 4, the requirement for stiffness can be reduced, and the tool shank 1 can be appropriately lightened to save costs and facilitate installation during use.

[0036] For the tool shank tooling of the present utility model, the tool shank pad 3 installed on the side of the tool shank 1 and the tool shank stabilizing block 6 installed inside the tool shank 1 are both detachable and can be selected and installed according to the sizes of different main nuts 7; the tool shank pad 3 can adjust the fixing position of the tool shank 1 on the tool shank fixing bracket 2 to be compatible with the machining of more different models of main nuts 7; the tool shank stabilizing block 6 can lengthen the mating plane of the tool shank 1 on the upper surface of the tool sleeve 4 to prevent the tool sleeve 4 from rotating during machining.

[0037] For the tool shank tooling of the present utility model, the tool sleeve 4 at the front end of the tool shank 1 is a replaceable part. When machining different models of main nuts 7, the tool sleeve 4 with the corresponding shape can be used according to the corresponding internal thread size, and the replacement is simple and fast.

[0038] For the tool shank tooling of the present utility model, the T-shaped guide block 9 is used to connect and guide between the tool shank 1 and the tool sleeve 4, and there is a gap between the T-shaped guide block 9 and the tool sleeve 4, enabling the tool shank 1 to slide on the tool sleeve 4 along the feed and retraction direction of the tool, aligning the cutting tool 5 with the starting machining point of the internal thread of the main nut 7 for machining operations, and making this tooling applicable to ordinary and CNC horizontal lathes.

[0039] It is easy for those skilled in the art to understand that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A tool holder tooling for internal thread machining, characterized in that, Comprising: A tool shank (1), which includes a shank body (101), a clamping portion (102) provided at the rear end of the shank body (101), and a tool head (103) provided at the front end of the shank body (101); A tool shank fixing bracket (2) for clamping and fixing the clamping portion (102) at the rear end of the tool shank (1); A tool (5) vertically provided outside the tool head (103); And a tool sleeve (4) slidably connected to the front end of the tool shank (1), which includes a connecting plate (401) provided at the bottom of the tool head (103), and an arc-shaped plate (402) fixedly provided at the bottom of the connecting plate (401), the arc of the arc-shaped plate (402) is adapted to the inner circle of the main nut (7) and fits on the inner circle of the main nut (7) to support the tool head (103) at the front end of the tool shank (1).

2. The tooling for internal thread machining according to claim 1, wherein A guide groove is formed on the connecting plate (401), and the guide groove communicates with a T-shaped notch (403) formed on one side of the top of the arc-shaped plate (402).

3. The tool holder tooling for internal thread machining according to claim 2, wherein A T-shaped guide block (9) is fixedly provided at the bottom of the tool head (103), which slides into the tool sleeve (4) from the T-shaped notch (403) and slides and is limited along the guide groove, realizing the sliding connection between the tool head (103) and the tool sleeve (4).

4. A tool holder tooling for internal thread machining according to any one of claims 1-3, characterized in that, A tool clamping cavity (104) is formed on the outside of the tool head (103), the size of the tool clamping cavity (104) is adapted to the tool (5), and after the tool (5) is placed in the tool clamping cavity (104), it is pressed and fixed by a locking bolt.

5. A toolholder tooling for internal thread machining according to any one of claims 1-3, characterized in that, A tool shank stabilizing block (6) is also vertically and fixedly provided inside the tool head (103), the bottom of the tool shank stabilizing block (6) contacts the top of the tool sleeve (4) to limit the tool sleeve (4) and prevent the main nut (7) from driving the tool sleeve (4) to rotate.

6. A tool holder tooling for internal thread machining according to any one of claims 1-3, characterized in that, A tool shank clamping cavity (201) is provided at the top of the tool shank fixing bracket (2), which cooperates with a locking bolt to clamp and fix the clamping portion (102) at the end of the tool shank (1).

7. A tool shank tooling for internal thread machining according to claim 6, characterized in that, A tool shank spacer (3) is fixedly provided on the side of the shank body (101), and the overall rod diameter of the fixed connection section between the two is the same as the rod diameter of the clamping portion (102), so as to be adapted to the tool shank clamping cavity (201); the tool shank spacer (3) and the shank body (101) are pressed and fixed in the tool shank clamping cavity (201) by a locking bolt, so as to adjust the overall length of the tool shank (1) to be adapted to the internal thread processing of the main nut (7) with different depths.

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