Boring machine cutter bar for machining interior of product

Abstract

The utility model discloses a boring machine toolbar for internal processing of products, which comprises a toolbar mechanism, the toolbar mechanism comprises a toolbar body, a directional mounting cavity is arranged in the toolbar body, mounting grooves are arranged on two sides of the toolbar body, first mounting holes are arranged in the mounting grooves, and the first mounting holes are communicated with the directional mounting cavity. Fixing blocks are fixed to the inner walls of the two sides of the mounting cavity. Compared with the prior art, through the arrangement of the mounting cavity, the fixing block and the extension rod mechanism in the cutter bar body, the sliding grooves in the two sides of the extension rod are in sliding connection with the fixing block, and the threaded sleeve is in bolt connection with the locking bolt, the effect that the extension length of the extension rod is accurately adjusted according to the machining requirement is achieved; the problem of axis deviation caused by machining errors and assembly gaps when multiple sections of cutter bars are spliced in the prior art is solved, and the overall coaxiality of the cutter bars is ensured; the cutter holder, the cutter groove and the second mounting hole are arranged at the bottom of the extension rod, so that stable mounting and quick replacement of the boring cutter blade are realized.

Description

Technical Field

[0001] This utility model relates to the field of boring machine tool holder technology, and in particular to a boring machine tool holder used for internal machining of products. Background Technology

[0002] Boring machine tool holders, as key components in the machining field, are widely used in the precision machining of internal holes and complex internal structures in products such as automotive engine cylinder blocks, hydraulic valve bodies, and mold cavities. By extending the cutting tool into the workpiece to perform boring operations, they effectively solve the machining problems of deep holes or narrow cavities that traditional tools cannot reach. With the continuous improvement of the precision requirements for parts machining in modern manufacturing, the rigidity, stability, and chip removal performance of boring machine tool holders directly affect the dimensional accuracy and surface quality of the workpiece.

[0003] When machining internal holes of different depths, the adjustment of the tool extension length is particularly critical for existing boring machine tool holders. Traditional solutions usually rely on replacing the entire tool holder with one of different specifications or stacking multiple extension rods by threading / flange to achieve length extension. Although this mechanical stacking can adapt to the needs of depth variation, it has significant drawbacks: the splicing surface of multiple tool holders is prone to axial misalignment due to machining errors or assembly clearances. The overall coaxiality of the stacked tool holder deteriorates step by step, causing the actual working trajectory of the tool to deviate from the theoretical axis, which in turn leads to problems such as out-of-tolerance cylindricity of the internal hole and fluctuations in hole diameter. Therefore, we propose a boring tool holder for internal machining of products. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a boring machine tool holder for internal product machining.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A boring machine tool holder for internal machining of a product includes a tool holder mechanism. The tool holder mechanism includes a tool holder body, an internal directional mounting cavity, mounting slots on both sides of the tool holder body, and first mounting holes inside the mounting slots. Fixing blocks are fixed to the inner walls on both sides of the mounting cavity. An extension rod mechanism is mounted inside the mounting cavity via the fixing blocks. A locking bolt is installed inside the first mounting hole, which secures the extension rod mechanism inside the tool holder body. A tool holder is mounted at the bottom of the extension rod mechanism, and a tool groove is formed at the bottom of the tool holder. Second mounting holes are formed on both sides of the tool holder. The second mounting holes and the tool grooves are used to mount boring tool inserts.

[0007] Preferably, the number of the first mounting holes is several sets, and the first mounting holes and the locking bolts are slidably connected.

[0008] Preferably, the extension rod mechanism includes an extension rod inserted into the mounting cavity, with sliding grooves on both sides of the extension rod, the sliding grooves being slidably connected to the fixing block, and a threaded sleeve fixed inside the extension rod.

[0009] Preferably, the tool holder is fixed to the bottom of the extension rod, and the number of threaded sleeves is several groups, which are equidistantly distributed on the extension rod. The threaded sleeves are connected to the locking bolts by bolts.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This invention achieves precise adjustment of the extension rod's length according to processing requirements by setting up an internal mounting cavity, a fixing block, and an extension rod mechanism within the tool holder body. The sliding grooves on both sides of the extension rod are slidably connected to the fixing block, and the threaded sleeve is bolted to the locking bolt. This avoids the axial misalignment problem caused by processing errors and assembly gaps when splicing traditional multi-segment tool holders, ensuring the overall coaxiality of the tool holder. By setting a tool holder, tool groove, and a second mounting hole at the bottom of the extension rod, stable installation and quick replacement of boring tool inserts are achieved. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a boring machine tool holder for internal product machining proposed in this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of a boring machine tool holder for internal product machining proposed in this utility model;

[0014] Figure 3 This is a schematic diagram of a boring bar for internal product machining proposed in this utility model.

[0015] In the figure: 1. Tool holder mechanism, 11. Tool holder body, 12. Mounting groove, 13. First mounting hole, 14. Fixing block, 2. Locking bolt, 3. Extension rod mechanism, 31. Extension rod, 32. Slide groove, 33. Threaded sleeve, 4. Tool holder, 5. Tool groove, 6. Second mounting hole. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figure 1-3A boring bar for internal machining of products includes a bar mechanism 1, which includes a bar body 11. The bar body 11 has a directional mounting cavity inside, and mounting grooves 12 are formed on both sides of the bar body 11. First mounting holes 13 are formed inside the mounting grooves 12, and there are several sets of first mounting holes 13. The first mounting holes 13 are slidably connected to locking bolts 2. Fixing blocks 14 are fixed to the inner walls on both sides of the mounting cavity. An extension rod mechanism 3 is installed inside the mounting cavity through the fixing blocks 14. Locking bolts 2 are installed inside the first mounting holes 13, and the locking bolts 2 install the extension rod mechanism 3 inside the bar body 11. A tool holder 4 is installed at the bottom of the extension rod mechanism 3, and a tool groove 5 is formed at the bottom of the tool holder 4. Second mounting holes 6 are formed on both sides of the tool holder 4. The second mounting holes 6 and the tool groove 5 are used to install boring tool inserts. The extension rod mechanism 3 includes an insertion mounting bracket. The extension rod 31 inside the cavity has grooves 32 on both sides, which are slidably connected to the fixing block 14. Threaded sleeves 33 are fixed inside the extension rod 31, and the tool holder 4 is fixed to the bottom of the extension rod 31. There are several sets of threaded sleeves 33, which are equidistantly distributed on the extension rod. The threaded sleeves 33 are bolted to the locking bolts 2. By setting the mounting cavity, fixing block, and extension rod mechanism inside the tool holder body, and by slidably connecting the grooves on both sides of the extension rod to the fixing block, combined with the bolted connection between the threaded sleeves and the locking bolts, the extension rod extension length can be precisely adjusted according to processing requirements. This avoids the axial offset problem caused by processing errors and assembly gaps when splicing traditional multi-segment tool holders, ensuring the overall coaxiality of the tool holder. By setting the tool holder, tool groove, and second mounting hole at the bottom of the extension rod, stable installation and quick replacement of boring tool inserts are achieved.

[0018] The tool holder body 11 is fixed to the boring machine spindle by bolts. When machining internal holes of different depths, first loosen the locking bolt 2. The sliding grooves 32 on both sides of the extension rod 31 slide along the fixing block 14, and can move back and forth in the mounting cavity to adjust the extension length. The sliding fit between the sliding groove 32 and the fixing block 14 restricts the radial wobble of the extension rod 31, ensuring that it moves smoothly along the axial direction. After adjusting to the required length, pass the locking bolt 2 through the first mounting hole 13 in the mounting groove 12 and thread it into the threaded sleeve 33 at the corresponding position inside the extension rod 31. Tighten the locking bolt 2 to fix the extension rod 31 inside the tool holder body 11. At this time, the tool holder 4 is fixed together with the extension rod 31. The boring tool insert is positioned by the tool groove 5 and fixed to the bottom of the tool holder 4 by a screw passing through the second mounting hole 6. During machining, the boring machine spindle drives the tool holder mechanism 1 to rotate, and the insert rotates at high speed with the tool holder 4 to perform boring operations on the inside of the workpiece. Due to the rigid connection between the extension rod 31 and the locking bolt 2 through the threaded sleeve 33 and the guiding effect of the slide groove 32 and the fixing block 14, the axial offset problem of the traditional multi-segment spliced ​​tool holder is effectively avoided, ensuring the coaxiality and stability of the tool holder during machining, thereby improving the machining accuracy and surface quality of the inner hole of the workpiece.

[0019] In summary, compared with the prior art, this utility model, by setting up an installation cavity, a fixing block, and an extension rod mechanism inside the tool holder body, and by sliding the grooves on both sides of the extension rod to the fixing block, and by bolting the threaded sleeve and the locking bolt, achieves the effect of precisely adjusting the extension rod extension length according to processing requirements. This avoids the axial offset problem caused by processing errors and assembly gaps when splicing traditional multi-segment tool holders, and ensures the coaxiality of the entire tool holder. By setting a tool holder, a tool groove, and a second mounting hole at the bottom of the extension rod, stable installation and quick replacement of boring tool inserts are achieved.

[0020] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A boring machine tool holder for internal machining of products, comprising a tool holder mechanism (1), characterized in that, The tool holder mechanism (1) includes a tool holder body (11), the tool holder body (11) has a directional mounting cavity inside, the tool holder body (11) has mounting grooves (12) on both sides, the mounting grooves (12) have first mounting holes (13) inside, the inner walls on both sides of the mounting cavity are fixed with fixing blocks (14), the mounting cavity has an extension rod mechanism (3) installed inside through the fixing blocks (14), the first mounting hole (13) has a locking bolt (2) installed inside, the locking bolt (2) installs the extension rod mechanism (3) inside the tool holder body (11), the bottom of the extension rod mechanism (3) has a tool holder (4), the bottom of the tool holder (4) has a tool groove (5), the tool holder (4) has second mounting holes (6) on both sides, the second mounting holes (6) and the tool groove (5) are used to install boring tool inserts.

2. A boring machine tool holder for internal product machining according to claim 1, characterized in that, The number of the first mounting holes (13) is several sets, and the first mounting holes (13) and the locking bolts (2) are slidably connected.

3. A boring machine tool holder for internal product machining according to claim 1, characterized in that, The extension rod mechanism (3) includes an extension rod (31) inserted into the mounting cavity. The extension rod (31) has a sliding groove (32) on both sides. The sliding groove (32) is slidably connected to the fixing block (14). A threaded sleeve (33) is fixed inside the extension rod (31).

4. A boring machine tool holder for internal product machining according to claim 3, characterized in that, The tool holder (4) is fixed to the bottom of the extension rod (31). There are several sets of threaded sleeves (33). The several sets of threaded sleeves (33) are located on the extension rod and are distributed at equal intervals. The threaded sleeves (33) are connected to the locking bolts (2) by bolts.

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