Pull boring cutter for machining bent workpiece cavity

Abstract

The utility model discloses a broaching and boring cutter for machining a bent workpiece cavity, which comprises a cutter bar, a guide device, a cutting device and a locking device are arranged on the cutter bar, the guide device comprises a guide block, a support sleeve, a cutter head, a spring, a spring connecting rod, a nut, a spacer bush and a support retainer ring, the side surface of the cutter bar is in contact with the spacer bush, and the cutter head is arranged on the support retainer ring. The side surface of the cutter bar is fixedly connected with the supporting check ring. By means of a stable elastic guide structure formed by the supporting block, the supporting sleeve, the cutter head, the spring, the spring connecting rod, the nut, the spacer bush and the supporting check ring in the guide device, the profile of a cavity can be tracked in real time, the posture can be flexibly adjusted, the machining path can be accurately guided, and the guide accuracy is guaranteed; the problems that when a cutter machines a bent workpiece, cutter guiding is delayed, and a blade is difficult to be attached to a to-be-machined face can be effectively solved, and the stability of the structure in use is improved through cooperation of a cutting head of the cutting device and a gasket.

Description

Technical Field

[0001] This utility model belongs to the field of deep hole machining technology, specifically relating to a boring tool for machining the cavity of a curved workpiece. Background Technology

[0002] Boring tools are mainly used for enlarging holes or machining high-precision holes. Currently, boring tools are mostly used in boring machines, machining centers and other equipment. When machining a workpiece, the boring tool rotates with the spindle and cuts the cavity surface of the workpiece. However, current boring tools have problems such as tool guide delay and difficulty in fitting the insert with the surface to be machined when machining curved workpieces. Utility Model Content

[0003] To solve the above-mentioned technical problems, the present invention provides a broaching tool for machining the cavity of a curved workpiece, comprising a tool holder, wherein a guide device, a cutting device and a locking device are provided on the tool holder;

[0004] The guiding device includes a guide block, a support sleeve, a cutter head, a spring, a spring connecting rod, a nut, a spacer, and a support retaining ring. The side surface of the cutter bar contacts the spacer, the side surface of the cutter bar is fixedly connected to the support retaining ring, the side surface of the support retaining ring contacts the support sleeve, the inner side wall of the cutter head contacts the support sleeve, and the side surface of the support sleeve is hinged to the guide block.

[0005] Through the above technical solution, a stable and elastic guiding structure is constructed by supporting block, supporting sleeve, cutter head, spring, spring connecting rod, nut, spacer, and supporting retaining ring. When the guide block is squeezed, it will push the cutter head and thus compress the spring. This allows the device to track the cavity contour in real time, flexibly adjust its posture, accurately guide the processing path, and ensure the accuracy of the guidance.

[0006] The present invention is further configured such that the cutting device includes a cutting head and a washer, and the cutting head is provided with a tool magazine.

[0007] The present invention is further configured such that the locking device includes a YSR locking nut and a pressure sleeve, the side surface of the guide block is an inclined surface, and the inclined surface of the guide block contacts the cutter head.

[0008] The above technical solution effectively prevents the cutting head from axially falling off by using the locking nut and the clamping sleeve.

[0009] The present invention is further configured such that the washer is provided with a threaded hole, the inner side wall of the washer is in contact with the tool holder, and the side surface of the washer is in contact with the cutting head.

[0010] The present invention is further configured such that both the cutter head and the nut are provided with threaded holes, and the nut is threadedly connected to the spring connecting rod.

[0011] With the above technical solution, the cutter head and nut are provided with threaded holes for connecting the cutter head, nut and spring connecting rod in series to achieve auxiliary guiding function.

[0012] The present invention is further configured such that the spring connecting rod is threadedly connected to the cutter head, and the spring is sleeved on the spring connecting rod.

[0013] The beneficial effects of this utility model are as follows:

[0014] The stable and elastic guiding structure constructed by the support block, support sleeve, cutter head, spring, spring connecting rod, nut, spacer and support retaining ring in the guiding device can track the cavity contour in real time, flexibly adjust the posture, and accurately guide the machining path, ensuring the accuracy of the guidance. It can effectively avoid the problems of tool guidance delay and difficulty in the blade to fit with the surface to be machined when machining curved workpieces. In addition, the cutting head of the cutting device and the washer cooperate to increase the stability of the structure during use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the assembly structure of a broaching tool for machining the cavity of a curved workpiece according to this utility model;

[0016] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 This is a schematic diagram of the tool magazine of a broaching tool for machining the cavity of a curved workpiece according to this utility model.

[0018] Reference numerals: 1. Guide device; 2. Cutting device; 3. Locking device; 100. Tool holder; 200. Tool magazine; 11. Guide block; 12. Support sleeve; 13. Tool disc; 14. Spring; 15. Spring connecting rod; 16. Nut; 17. Spacer; 18. Support retaining ring; 21. Cutting head; 22. Washer; 31. Pressure sleeve; 32. YSR locking nut. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] like Figures 1-3As shown, a broaching tool for machining the cavity of a curved workpiece in this embodiment includes a tool holder 100. The tool holder 100 is provided with a guide device 1, a cutting device 2 and a locking device 3. When the device is used to machine the cavity of the curved workpiece, the guide device 1 guides the cutting head 21. The cutting device 2 is used to machine the workpiece. The locking device 3 is used to fix the position of the cutting head 21 to prevent the cutting head 21 from falling off axially during use.

[0021] The guiding device 1 includes a guide block 11, a support sleeve 12, a cutter head 13, a spring 14, a spring connecting rod 15, a nut 16, a spacer 17, and a support retaining ring 18. The side surface of the cutter bar 100 contacts the spacer 17, and the side surface of the cutter bar 100 is fixedly connected to the support retaining ring 18. The side surface of the support retaining ring 18 contacts the support sleeve 12. The inner side wall of the cutter head 13 contacts the support sleeve 12, and the side surface of the support sleeve 12 is hinged to the guide block 11. Both the cutter head 13 and the nut 16 are provided with threaded holes. The nut 16 is threadedly connected to the spring connecting rod 15, and the spring connecting rod 15 is threadedly connected to the cutter head 13. The spring 14 is sleeved on the spring connecting rod 15. The support block 11, support sleeve 12, and cutter head 13 are all connected to the spring connecting rod 15. The stable and elastic guiding structure is constructed by the cooperation of disc 13, spring 14, spring connecting rod 15, nut 16, spacer 17 and support retaining ring 18. The guide block 11 of the guiding device 1 will push the cutter disc 13 to generate displacement when it is squeezed. It can track the cavity contour in real time, flexibly adjust the posture, and accurately guide the processing path to ensure the accuracy of the guide. The guide block 11 is dynamically adjusted in real time according to the bending of the workpiece, so that the cutting head 21 fits the surface to be processed, improves the cutting quality, and can effectively avoid the problem of tool guide delay and difficulty in the blade fitting the surface to be processed when processing curved workpieces. The guide block 11 is made of aluminum alloy to ensure strength while reducing the weight, thereby reducing the risk of device sagging and achieving high-precision processing.

[0022] The cutting device 2 includes a cutting head 21 and a washer 22. The cutting head 21 is provided with a tool magazine 200, and the washer 22 is provided with a threaded hole. The inner side wall of the washer 22 contacts the tool holder 100, and the side surface of the washer 22 contacts the cutting head 21. The cutting device 2 is used to process the workpiece, and the tool magazine 200 is used to install the cutting blade and limit the cutting blade.

[0023] The locking device 3 includes a YSR locking nut 31 and a clamping sleeve 32. The side surface of the guide block 11 is an inclined surface, which contacts the cutter head 13. The clamping sleeve 31 clamps the cutting head 21, while the YSR locking nut 32 locks the clamping sleeve 31 at the tool holder 100 to prevent the cutting head 21 from moving axially and falling off, thus ensuring the stability of the machining process.

[0024] The working principle of this utility model is as follows: When this device is used to process the cavity of a curved workpiece, the guide block 11 will press down or rise with the dynamic changes of the cavity. At this time, it will push the cutter head 13 to produce displacement, thereby causing the cutter head 13 to press and release the spring 14, accurately guiding the cutting head 21 and making the blade fit against the surface of the workpiece to be processed, which can effectively ensure the processing quality. The tool magazine 200 is set in the cutting head 21. Before processing, the blade is placed in the tool magazine 200, and the tool magazine 200 constrains and limits the blade.

[0025] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A broaching tool for machining the cavity of a curved workpiece, comprising a tool holder (100), characterized in that: The tool holder (100) is provided with a guide device (1), a cutting device (2) and a locking device (3); The guiding device (1) includes a guide block (11), a support sleeve (12), a cutter head (13), a spring (14), a spring connecting rod (15), a nut (16), a spacer (17), and a support retaining ring (18). The side surface of the cutter bar (100) is in contact with the spacer (17), the side surface of the cutter bar (100) is fixedly connected to the support retaining ring (18), the side surface of the support retaining ring (18) is in contact with the support sleeve (12), the inner side wall of the cutter head (13) is in contact with the support sleeve (12), and the side surface of the support sleeve (12) is hinged to the guide block (11).

2. The broaching tool for machining the cavity of a bent workpiece according to claim 1, characterized in that, The cutting device (2) includes a cutting head (21) and a washer (22), and the cutting head (21) is provided with a tool magazine (200).

3. The broaching tool for machining the cavity of a curved workpiece according to claim 1, characterized in that, The locking device (3) includes a YSR locking nut (31) and a clamping sleeve (32). The side surface of the guide block (11) is an inclined surface, and the inclined surface of the guide block (11) is in contact with the cutter head (13).

4. A broaching tool for machining cavities of curved workpieces according to claim 2, characterized in that, The washer (22) is provided with a threaded hole, the inner side wall of the washer (22) is in contact with the tool holder (100), and the side surface of the washer (22) is in contact with the cutting head (21).

5. A broaching tool for machining cavities of curved workpieces according to claim 1, characterized in that, Both the cutter head (13) and the nut (16) are provided with threaded holes, and the nut (16) is threadedly connected to the spring connecting rod (15).

6. A broaching tool for machining cavities of curved workpieces according to claim 1, characterized in that, The spring connecting rod (15) is threadedly connected to the cutter head (13), and the spring (14) is sleeved on the spring connecting rod (15).

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