A tool holder for a numerically controlled machine tool

Abstract

The utility model provides a tool fixing seat for numerical control machine tool, including mounting seat and clamping component, clamping component sets up in mounting seat one side, the inside of mounting seat is equipped with the installation cavity for connecting with numerical control machine tool, just the top and the bottom of mounting seat are equipped with the sliding slot of communication with installation cavity, the inside slidingly connected of installation cavity has the connecting sliding block, clamping component includes fixed clamping block, movable clamping block and adjusting bolt, fixed clamping block is connected with connecting sliding block, the one side of fixed clamping block is opposite and is provided with movable clamping block, the one end of adjusting bolt penetrates movable clamping block and is connected with fixed clamping block threadedly, the one end of adjusting bolt is fixedly connected with movable clamping block, and the other end is inserted into the multiple sets of thread hole of fixed clamping block, the opposite side of fixed clamping block and movable clamping block all is equipped with the half circle clamping groove of setting up, two clamping grooves form the clamping hole for clamping tool cooperation.

Description

Technical Field

[0001] This utility model relates to the field of tool holder technology, specifically a tool holder for CNC machine tools. Background Technology

[0002] In the field of CNC machine tool processing, the stable fixing of cutting tools is the core prerequisite for ensuring machining accuracy (such as dimensional tolerances and surface roughness) and operational safety. The tool holder is an important component of the machine tool. Depending on different machining requirements, different sizes and types of cutting tools need to be loaded on the tool holder.

[0003] A lathe tool holder disclosed in publication number "CN220278285U" includes a tool holder plate, a tool clamping block, a locking block, a threaded pressure rod, a locking rod upper pressure head, a support holder, a lower moving plate, a limit insert, a spring, and a tool. The lower surface of the support holder is in contact with the lower moving plate, and the support holder is connected to the lower moving plate by multiple fixing bolts. The upper surface of the support holder is in contact with the tool holder plate. The lower part of the locking rod upper pressure head has a locking threaded rod, which passes through the tool holder plate. The locking threaded rod is threadedly connected to the support fixing seat and rotates inside the tool fixing plate. The lower surface of the pressure head on the locking rod is in contact with the tool fixing plate. The side handle is connected to the side of the pressure head on the locking rod. The lower part of the locking fixing block is connected to the tool fixing plate. Multiple locking fixing blocks are evenly distributed on the tool fixing plate and connected to the lower moving plate by multiple fixing bolts, so that the support fixing seat is fixed on the lower moving plate. The locking threaded rod passes through the tool fixing plate and connects to the support fixing seat, so that the tool fixing plate and the support fixing seat are coaxial.

[0004] However, the above-mentioned device still has the following problems during implementation: 1. Traditional clamping seats have fixed clamping dimensions, making it difficult to accommodate tools of different diameters. When changing tools, the entire clamping seat needs to be replaced, resulting in low tool changing efficiency and high equipment maintenance costs. Some clamping seats are locked with a single bolt, which can easily cause radial displacement due to the force on the tool during clamping (especially in high-speed cutting scenarios), leading to machining errors. 2. The axial position adjustment of the tool depends on the movement of the CNC machine tool spindle. It cannot be finely adjusted by the structure of the fixed seat itself, making it difficult to adapt to the fine requirements of tool position in complex curved surface machining. Tools such as wrenches are required when disassembling and assembling the tool, and there is a lack of anti-loosening design. After long-term use, the locking may fail due to vibration, which poses a safety hazard. Utility Model Content

[0005] The purpose of this invention is to provide a tool holder for CNC machine tools to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A tool holder for a CNC machine tool includes a mounting base and a clamping assembly. The clamping assembly is disposed on one side of the mounting base. The mounting base has a mounting cavity for connecting with the CNC machine tool. The top and bottom of the mounting base have sliding grooves communicating with the mounting cavity. A connecting slider is slidably connected inside the mounting cavity. The clamping assembly includes a fixed clamping block, a movable clamping block, and an adjusting bolt. The fixed clamping block is engaged with the connecting slider. One side of the fixed clamping block is opposite to the movable clamping block. One end of the adjusting bolt passes through the movable clamping block and is threadedly connected to the fixed clamping block. One end of the adjusting bolt is fixedly connected to the movable clamping block, and the other end is inserted into multiple sets of threaded holes in the fixed clamping block. Semi-circular clamping grooves are provided on the opposite sides of both the fixed clamping block and the movable clamping block. Two clamping grooves cooperate to form a clamping hole for clamping the tool.

[0007] Preferably, the top end of the connecting slider is threaded with a fixing pin, the top of the connecting slider is provided with a positioning hole, the bottom end of the fixing pin is threaded into the positioning hole, a washer is provided on the fixing pin, and the diameter of the top end of the fixing pin is greater than the lateral length of the groove.

[0008] Preferably, a locking block is fixedly installed on one side of the connecting slider, and a locking groove is opened on the rear side of the fixing block corresponding to the locking block. The locking block is locked inside the locking groove, and a rubber gasket is sleeved on the outer surface of the locking block.

[0009] Preferably, a connecting groove is provided on one side of the fixed clamping block, and a connecting plug is fixedly installed on the other side of the fixed clamping block. The connecting plug is matched with the connecting groove. When multiple sets of tools need to be installed, the connecting plug is inserted into the connecting groove, so that the connection between multiple sets of fixed clamping blocks is stable when multiple sets are used.

[0010] Preferably, the inner walls of the clamping grooves of the fixed clamping block and the movable clamping block are provided with anti-slip textures, which are annular protrusions distributed circumferentially along the clamping groove or strip-shaped protrusions distributed axially.

[0011] Preferably, the mounting base is a cuboid structure, the mounting cavity is provided through the mounting base along its length, and the sliding groove extends along the length of the mounting base.

[0012] Preferably, the adjusting bolts are provided in multiple sets and symmetrically distributed on both sides of the movable clamping block, and each set of adjusting bolts has a locking nut at one end.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. By adjusting the bolts, the movable clamping block and the fixed clamping block can move relative to each other, so that the diameter of the clamping hole can be flexibly adjusted according to the tool specifications. It can be compatible with milling cutters, drills and other tools of different diameters without replacing the fixed seat, thus reducing the equipment investment cost. 2. The adjusting bolt and locking nut work together to limit the radial displacement of the movable clamping block. Combined with the anti-slip texture on the inner wall of the clamping groove, they ensure the clamping stability during high-speed cutting to a certain extent and improve machining accuracy. 3. The knob design at the end of the adjusting bolt allows for manual operation, enabling tool assembly and disassembly without the need for auxiliary tools. The threaded connection has a self-locking feature, preventing loosening caused by vibration and improving work efficiency and safety. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is an exploded view of the main structure of this utility model; Figure 3 This is an exploded structural diagram of the clamping component of this utility model; Figure 4 This is a rear view structural diagram of the fixing clamping block part of this utility model.

[0015] In the diagram: 1. Mounting base; 2. Clamping assembly; 201. Fixed clamping block; 202. Movable clamping block; 203. Adjusting bolt; 3. Clamping hole; 4. Fixing pin; 5. Positioning hole; 6. Locking block; 7. Locking groove; 8. Connecting groove; 9. Connecting insert; 10. Slide groove; 11. Locking nut; 12. Mounting cavity; 13. Connecting slider. 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-4 This utility model provides a technical solution: A tool holder for a CNC machine tool includes a mounting base 1 and a clamping assembly 2. The clamping assembly 2 is disposed on one side of the mounting base 1. The mounting base 1 has a mounting cavity 12 for connecting with the CNC machine tool. The top and bottom of the mounting base 1 are provided with sliding grooves 10 communicating with the mounting cavity 12. A connecting slider 13 is slidably connected inside the mounting cavity 12. The clamping assembly 2 includes a fixed clamping block 201, a movable clamping block 202, and an adjusting bolt 203. The fixed clamping block 201 is engaged with the connecting slider 13. One side of the fixed clamping block 201 is opposite to the movable clamping block 202. One end of the adjusting bolt 203 passes through the movable clamping block 202 and is threadedly connected to the fixed clamping block 201. One end of the adjusting bolt 203 is fixedly connected to the movable clamping block 202, and the other end is inserted into multiple sets of threaded holes in the fixed clamping block 201. Semi-circular clamping grooves are provided on the opposite sides of the fixed clamping block 201 and the movable clamping block 202. The two clamping grooves cooperate to form a clamping hole 3 for clamping the tool. The movable clamping block and the fixed clamping block are driven to move relative to each other by the adjusting bolt, so that the diameter of the clamping hole can be flexibly adjusted according to the tool specifications. The top of the connecting slider 13 is threaded with a fixing pin 4, and the top of the connecting slider 13 is provided with a positioning hole 5. The bottom end of the fixing pin 4 is threaded into the positioning hole 5. A washer is provided on the fixing pin 4, and the diameter of the top of the fixing pin 4 is greater than the lateral length of the slide groove 10. A locking block 6 is fixedly installed on one side of the connecting slider 13. A locking groove 7 is opened on the rear side of the fixing clamp 201 corresponding to the locking block 6. The locking block 6 is locked inside the locking groove 7. A rubber gasket is sleeved on the outer surface of the locking block 6. A connecting groove 8 is provided on one side of the fixed clamping block 201, and a connecting plug 9 is fixedly installed on the other side of the fixed clamping block 201. The connecting plug 9 is matched with the connecting groove 8. When multiple sets of tools need to be installed, the connecting plug 9 is inserted into the connecting groove 8, so that the connection between multiple sets of fixed clamping blocks is stable when multiple sets are used. The inner walls of the clamping grooves of the fixed clamping block 201 and the movable clamping block 202 are provided with anti-slip textures, which are annular protrusions distributed along the circumference of the clamping groove or strip protrusions distributed axially. Mounting base 1 is a cuboid structure, with mounting cavity 12 extending through the length of mounting base 1 and sliding groove 10 extending along the length of mounting base 1. Multiple sets of adjusting bolts 203 are provided and symmetrically distributed on both sides of the movable clamping block 202, and a locking nut 11 is provided at one end of each set of adjusting bolts 203.

[0018] Working principle: During use, the mounting base 1 is rigidly connected to the tool post or spindle seat of the CNC machine tool through the internal mounting cavity 12. The rectangular mounting base provides stable support. The tool is placed between the semi-circular clamping slots of the fixed clamping block 201 and the movable clamping block 202. The knob of the adjusting bolt 203 is rotated, and the movable clamping block 202 is driven to move closer to the fixed clamping block 201 by its threaded engagement with the fixed clamping block 201 until the circular clamping hole formed by the two clamping slots clamps the tool. According to the processing requirements, the clamping component 2 is slid along the slide groove 10 of the mounting base 1. After adjustment, the position of the clamping component 2 can be fixed by the fixing pin 4 in the slide groove 10 to ensure that the position remains unchanged during the processing.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tool holder for a CNC machine tool, comprising a mounting base (1) and a clamping assembly (2), characterized in that: The clamping assembly (2) is disposed on one side of the mounting base (1). The mounting base (1) has a mounting cavity (12) for connecting with a CNC machine tool. The top and bottom of the mounting base (1) are provided with sliding grooves (10) communicating with the mounting cavity (12). A connecting slider (13) is slidably connected inside the mounting cavity (12). The clamping assembly (2) includes a fixed clamping block (201), a movable clamping block (202), and an adjusting bolt (203). The fixed clamping block (201) is engaged with the connecting slider (13). One side of the fixed clamping block (201) is opposite to the movable clamping block (202). One end of the adjusting bolt (203) passes through the movable clamping block (202) and is threadedly connected to the fixed clamping block (201). One end of the adjusting bolt (203) is fixedly connected to the movable clamping block (202), and the other end is inserted into multiple sets of threaded holes in the fixed clamping block (201). The fixed clamping block (201) and the movable clamping block (202) each have a semi-circular clamping groove on their opposite sides. The two clamping grooves cooperate to form a clamping hole (3) for clamping the tool.

2. A tool holder for a CNC machine tool according to claim 1, characterized in that: The top of the connecting slider (13) is threaded with a fixing pin (4), the top of the connecting slider (13) is provided with a positioning hole (5), the bottom end of the fixing pin (4) is threaded into the positioning hole (5), a gasket is provided on the fixing pin (4), and the diameter of the top of the fixing pin (4) is greater than the lateral length of the groove (10).

3. A tool holder for a CNC machine tool according to claim 1, characterized in that: A locking block (6) is fixedly installed on one side of the connecting slider (13). A slot (7) is opened on the rear side of the fixing clamp (201) corresponding to the locking block (6). The locking block (6) is engaged in the slot (7). A rubber gasket is sleeved on the outer surface of the locking block (6).

4. A tool holder for a CNC machine tool according to claim 1, characterized in that: A connecting groove (8) is provided on one side of the fixed clamping block (201), and a connecting plug (9) is fixedly installed on the other side of the fixed clamping block (201). The connecting plug (9) is matched with the connecting groove (8). When multiple sets of tools need to be installed, the connecting plug (9) is inserted into the connecting groove (8) to make the connection between multiple fixed clamping blocks stable when multiple sets are used.

5. A tool holder for a CNC machine tool according to claim 1, characterized in that: The inner walls of the clamping grooves of the fixed clamping block (201) and the movable clamping block (202) are provided with anti-slip textures, which are annular protrusions distributed circumferentially along the clamping groove or strip protrusions distributed axially.

6. A tool holder for a CNC machine tool according to claim 1, characterized in that: The mounting base (1) is a cuboid structure, the mounting cavity (12) is provided through the mounting base (1) along its length, and the sliding groove (10) extends along the length of the mounting base (1).

7. A tool holder for a CNC machine tool according to claim 1, characterized in that: The adjusting bolts (203) are provided in multiple sets and symmetrically distributed on both sides of the movable clamp (202), and each set of adjusting bolts (203) has a locking nut (11) at one end.

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