A roll-milling compound tool holder

Abstract

The utility model relates to the technical fields of gear tool rest, concretely is a kind of roll milling compound tool rest, including tool holder and the tool bar fixed on tool holder;The tool holder includes base and the connecting head fixed on the upper end of base, the connecting head is cuboid structure, and the through three-prong hole is horizontally equipped in connecting head, and the upper end surface of connecting head is equipped with vertical through-hole and threaded hole, and the through-hole and threaded hole are all communicated with three-prong hole, the bolt is equipped in the through-hole, and the limiting screw is equipped in threaded hole;The tool bar includes the threaded section, the light pole section and the connecting section fixed in turn, and the end portion of the connecting section away from light pole section is equipped with three-prong shaft, the shape of three-prong shaft is matched with three-prong hole, and recess is further equipped on three-prong shaft, and the bottom end of limiting screw is located in recess.The roll milling compound tool rest can realize the quick installation of tool tool bar, improves equipment utilization rate, can reduce manufacturing, assembly and maintenance cost, and comprehensively improves processing efficiency and economy.

Description

Technical Field

[0001] This utility model relates to the technical field of gear tool holders, specifically a hobbing composite tool holder. Background Technology

[0002] In the gear manufacturing industry, with the ever-increasing demand for high-efficiency machining, hobbing-milling composite machining technology has emerged. Hobbing-milling composite machining requires mounting both the hob and the milling cutter on the same tool holder, allowing for gear hobbing and milling to be performed in a single operation with a single setup, greatly improving machining efficiency.

[0003] Current technologies include hobbing-milling composite tool holders that can be mounted on equipment, such as the existing "milling-hobbing composite tool holder" (publication number: CN104493309A). These holders can assemble a hob and a milling cutter on the same tool holder, allowing gears to be hobbed and milled on the same machine tool with only one setup, without needing to change tool holders and cutting tools. This improves the efficiency of milling and hobbing processes and saves time on tool changes and resetting. However, this existing technology still has the following technical problems:

[0004] While existing composite tool holders can mount hobs and end mills on the same tool holder, they are only suitable for the same type of tool. If a different type of tool needs to be replaced, the tool holder must be removed from the equipment to accommodate the different tool sizes due to the different inner diameters of the tools. The tool holders and tools used for sun gear machining are quite heavy, requiring them to be hoisted onto the equipment for replacement. Furthermore, the installation clearance between the tool holder and the tool is extremely small, and the tool holder must be kept perfectly horizontal during installation to insert the tool. This makes tool holder replacement very time-consuming in existing technologies. In addition, the connection between the end of the tool holder and the equipment usually has directional limitations, requiring adjustment of the installation direction during tool holder installation, resulting in very inconvenient operation and extremely low efficiency. Utility Model Content

[0005] This utility model provides a hobbing composite tool holder, which can solve the problems of time-consuming and inconvenient operation and low efficiency in the existing composite tool holder when changing different types of tools. This is because the tool holder and the tool are heavy, the tool holder must be kept completely horizontal during installation, and there are directional restrictions at the connection between the tool holder and the equipment.

[0006] This application provides the following technical solution: a hobbing composite tool holder, including a tool holder and a tool shank fixed on the tool holder;

[0007] The tool holder includes a base and a connector fixed to the upper end of the base. The connector is a cuboid structure with a horizontally through triangular hole on the connector. The upper end face of the connector has a vertical through hole and a threaded hole. Both the through hole and the threaded hole are connected to the triangular hole. A pin is provided in the through hole and a limiting screw is provided in the threaded hole.

[0008] The tool holder includes a threaded section, a smooth section, and a connecting section fixed in sequence. The end of the connecting section away from the smooth section is provided with a triangular shaft. The shape of the triangular shaft matches the triangular hole. The triangular shaft is also provided with a groove. The bottom end of the limiting screw is located in the groove.

[0009] Beneficial effects:

[0010] 1. Improved tool change convenience and machining efficiency. In this solution, the triangular shaft of the tool holder mates with the triangular hole on the connector, allowing the tool holder and tool holder to form a detachable connection. When changing the tool holder, the new tool holder can be installed into the tool holder. The horizontally positioned triangular hole keeps the tool holder horizontal, facilitating quick tool installation by the operator, significantly shortening tool change time and improving convenience. Furthermore, while the equipment is running, the operator can pre-install the tool holder and tool to be replaced using the tool holder, locking the tool holder's installation direction in advance. When the equipment stops, the old tool holder can be removed, and the new tool holder installed as a whole. Compared to existing technologies that require stopping the equipment before changing tools and tool holders, this solution improves equipment utilization, indirectly saving tool change time and increasing efficiency.

[0011] 2. Improved ease of replacement. The triangular facets of the triangular shaft help operators identify the installation direction of the tool holder. The grooves on the triangular shaft serve as direction indicators, and the limiting screws ensure that the grooves on the triangular shaft can only be inserted into the tool holder when the grooves are in the correct orientation. This prevents operators from inserting the tool holder in the wrong direction during installation, achieving the purpose of error prevention. Compared with the existing technology where the tool holder is connected by a cylindrical shaft, the installation direction of the tool holder can be quickly confirmed and adjusted, making the installation process a one-step process and greatly improving the ease of replacement.

[0012] 3. Reduced costs. Existing technologies typically use cylindrical or tapered bore shafts for tool holder connections, requiring additional anti-rotation structures, such as keys, to prevent tool holder rotation. However, the triangular shaft and triangular bore connection method in this solution can prevent circumferential rotation of the tool holder after installation through its own structural shape, eliminating the need for additional anti-rotation components. This makes the overall structure simpler and more compact, reducing not only the manufacturing and assembly processes and costs of parts but also the maintenance costs caused by damage to anti-rotation components.

[0013] Furthermore, the triangular shaft is provided with a vertical through hole, and the lower end of the pin extends into the through hole.

[0014] Beneficial effects: The fit between the pin and the through hole increases the connection points between the tool holder and the tool base, thus constraining the tool holder. In addition to preventing circumferential rotation through the fit between the triangular shaft and the triangular hole, the pin further prevents possible axial and vertical wobbling or displacement of the tool holder, making the connection between the tool holder and the tool base more robust and reliable, thereby ensuring the stability and accuracy of the tool when it is installed in the tool holder.

[0015] Furthermore, the connecting section is provided with a keyway, and the keyway and the groove on the triangular shaft are located on the same straight line.

[0016] Beneficial effects: When installing the tool holder, operators only need to observe whether the keyway and the groove on the triangular shaft are on the same straight line to quickly and intuitively determine whether the tool holder is installed in the correct direction. This effectively avoids the tool holder being installed in the wrong direction, allowing the tool holder to be adjusted in the correct direction before being installed in the equipment, thus improving the accuracy and efficiency of the installation when the tool holder is officially installed in the equipment.

[0017] Furthermore, the base includes a crossbeam, a longitudinal beam fixed on the crossbeam, a column fixed on the longitudinal beam, and a reinforcing rib fixed at the connection between the longitudinal beam and the column, with the connector fixed to the top of the column.

[0018] Beneficial effects: The crossbeams, longitudinal beams and columns are fixed together to form a frame structure, which provides a solid support foundation for the connectors and tool holders, and enhances the overall rigidity and stability of the base.

[0019] Furthermore, the polished section of the tool holder is provided with a waist-shaped groove, and a long key is provided in the waist-shaped groove.

[0020] Beneficial effects: The combination of the long key and the waist-shaped groove can limit the circumferential rotation and a certain degree of axial movement of the tool after installation, making the connection between the tool and the tool holder more stable, effectively bearing the cutting force and torque generated during the machining process, reducing machining errors caused by tool loosening, and improving machining accuracy. Attached Figure Description

[0021] Figure 1 This is an isometric view of the present invention;

[0022] Figure 2 This is a front view of the present invention.

[0023] Figure 3 for Figure 2 A magnified view of A in the middle.

[0024] Figure 4 for Figure 1 Isometric view of the middle tool holder. Detailed Implementation

[0025] The following detailed description illustrates the specific implementation method:

[0026] The markings in the accompanying drawings of the instruction manual include: longitudinal beam 1, crossbeam 2, reinforcing rib 3, column 4, connector 5, limit screw 501, short key 502, triangular hole 503, pin 6, tool holder 7, triangular shaft 701, through hole 7011, groove 7012, connecting section 702, keyway 7021, smooth section 703, waist-shaped groove 7031, threaded section 704, milling cutter 8, washer 9, hob 10, tapered sleeve 11, and lock nut 12.

[0027] Example 1

[0028] like Figures 1 to 4 As shown, a hobbing composite tool holder includes a tool holder and a tool shank 7 fixed on the tool holder.

[0029] like Figure 1 and Figure 2 As shown, the tool holder includes a base and a connector 5 fixed to the upper end of the base. The base includes two parallel crossbeams 2, a longitudinal beam 1 fixed between the two crossbeams 2, a column 4 vertically fixed to the longitudinal beam 1, and reinforcing ribs 3 fixed at the connection between the longitudinal beam 1 and the column 4. A mounting plate is fixed to the top of the column 4, and the connector 5 is fixed to the mounting plate with screws. The crossbeams 2, longitudinal beam 1, and column 4 are fixed to each other to form a frame structure, providing a solid support foundation for the connector 5 and the tool holder 7, etc., and enhancing the overall rigidity and stability of the base.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, the connector 5 is a cuboid structure. A through triangular hole 503 is provided horizontally on the connector 5. A vertical through hole 7011 and a threaded hole are provided on the upper end face of the connector 5. Both the through hole 7011 and the threaded hole are connected to the triangular hole 503. A pin 6 is provided in the through hole 7011 and a limit screw 501 is provided in the threaded hole.

[0031] like Figure 1 , Figure 2 and Figure 4 As shown, the tool holder 7 includes an integrally formed threaded section 704, a smooth section 703, and a connecting section 702. The end of the connecting section 702 away from the smooth section 703 is provided with a triangular shaft 701. The shape of the triangular shaft 701 matches the triangular hole 503. The triangular shaft 701 is also provided with a groove 7012, and a vertical through hole is provided next to the groove 7012. Figure 3 and Figure 4As shown, the bottom end of the limiting screw 501, which extends downward from the threaded hole on the connector 5, is located in the groove 7012. The lower end of the pin 6, which is inserted downward from the through hole 7011 of the connector 5, extends into the through hole. The engagement of the pin 6 with the through hole increases the connection point between the tool holder 7 and the tool support, thus constraining the tool holder 7. At the same time, the engagement of the triangular shaft 701 with the triangular hole 503 prevents the tool holder 7 from rotating circumferentially relative to the connector 5. The pin 6 further prevents the tool holder 7 from wobbling or displacing in the axial and vertical directions, making the connection between the tool holder 7 and the tool support more secure and reliable, thereby ensuring the stability and accuracy of the tool when it is installed in the tool holder 7.

[0032] like Figure 3 and Figure 4 As shown, the connecting section 702 is also provided with a keyway 7021. The keyways 7021 are symmetrically arranged, and the keyway 7021 and the groove 7012 on the triangular shaft 701 are located on the same straight line. When installing the tool holder 7, the operator only needs to observe whether the keyway 7021 and the groove 7012 on the triangular shaft 701 are on the same straight line to quickly and intuitively determine whether the tool holder 7 is installed in the correct direction. This effectively avoids the tool holder 7 being installed in the wrong direction, allowing the installation direction to be adjusted before installation into the equipment, thus improving the accuracy and efficiency of installation when the tool holder 7 is officially installed into the equipment. Figure 3 As shown, a short key 502 is provided in the keyway 7021. The short key 502 is fixed to the connecting section 702 by screws. One end of the short key 502 extends into the anti-rotation groove on the milling cutter 8 to prevent the milling cutter 8 from rotating.

[0033] like Figure 4 As shown, the polished section 703 of the tool holder 7 is provided with a waist-shaped groove 7031, and a long key can be installed in the waist-shaped groove 7031. The cooperation between the long key and the waist-shaped groove 7031 can restrict the circumferential rotation of the hob 10 after installation and a certain degree of axial movement, making the connection between the tool and the tool holder 7 more stable, effectively bearing the cutting force and torque generated during machining, reducing machining errors caused by tool loosening, and improving machining accuracy.

[0034] The installation and replacement methods for cutting tools are as follows:

[0035] 1. Insert the triangular shaft 701 section of the tool holder 7 into the triangular hole 503 of the tool post, as follows: Figure 3 As shown, ensure that the through hole 7011 and groove 7012 on the triangular shaft 701 of the tool holder 7 are directly upward. After installation, the bottom end of the limit screw 501 is in the groove 7012 on the triangular shaft 701, and insert the pin 6 from the through hole 7011 of the connector 5 so that the bottom end of the pin 6 is inserted into the through hole of the triangular shaft 701.

[0036] 2. Insert two short keys 502 into the keyway 7021 of the connecting section 702 of the tool holder 7 and tighten them with screws;

[0037] 3. Insert the milling cutter 8 into the polished bar section 703 from the threaded section 704 of the cutter shank 7, so that the short key 502 is engaged in the anti-rotation groove on the end face of the milling cutter 8;

[0038] 4. Install the long key;

[0039] 5. Install as many washers as needed;

[0040] 6. Insert the hob 10, and insert the long key into the mounting keyway in the inner hole of the hob 10;

[0041] 7. Install as many washers as needed; 9.

[0042] 8. Install the tapered sleeve 11 and the lock nut 12 in sequence;

[0043] 9. Disassemble the tool holder 7 on the equipment in accordance with regulations.

[0044] 10. Use the overhead crane's hanging rope to secure the tool bar 7 on the tool holder, adjust the height so that it is just under stress, remove the pin 6, manually disengage the tool bar 7 from the triangular hole 503 on the connector 5, and then start the overhead crane away from the tool holder.

[0045] 11. Hoist the tool holder 7 onto the equipment and slowly move it closer to the main shaft. Lift the tool holder 7 so that the triangular shaft 701 of the tool holder 7 enters the mounting hole of the main shaft of the equipment. Lock the main shaft with the key. Quickly remove the air from the triangular shaft 701 of the tool holder 7 and the mounting hole of the main shaft to make it secure. Check by hand that it is correct, then release the hoisting rope and start the crane. Push the tailstock clamping device to make it position in the tapered sleeve 11 of the tool holder 7 and then lock the hexagonal screw. Tighten the locking nut 12 on the tool holder 7. Check the tool shaft runout with a dial indicator. Once it is qualified, it can be processed.

[0046] This solution has the following advantages:

[0047] 1. Improved tool change convenience and processing efficiency. In this solution, the triangular shaft 701 of the tool holder 7 mates with the triangular hole 503 on the connector 5, allowing the tool holder 7 to form a detachable connection with the tool holder. When replacing the tool holder 7, the new tool holder 7 can be installed on the tool holder. The horizontally positioned triangular hole 503 keeps the tool holder 7 horizontal, facilitating quick tool installation by the operator, significantly shortening tool change time and improving tool change convenience. Furthermore, while the equipment is running, the operator can use the tool holder to pre-install the tool holder 7 and the tool to be replaced, and pre-lock the installation direction of the tool holder 7 on the tool holder. When the equipment stops running, the old tool holder 7 can be removed from the equipment, and the new tool holder 7 can be installed as a whole. Compared to the existing technology, which requires stopping the equipment before changing the tool and tool holder 7, this solution can improve equipment utilization, indirectly saving tool change time and improving efficiency.

[0048] 2. Improved ease of replacement operation. The triangular facet of the triangular shaft 701 helps operators identify the installation direction of the tool holder 7. The groove 7012 on the triangular shaft 701 serves as a direction indicator. At the same time, the limiting screw 501 ensures that the groove 7012 of the triangular shaft 701 can only be inserted into the tool holder when the correct orientation is maintained. This prevents operators from inserting the tool holder 7 in the wrong direction during installation, achieving the purpose of error prevention. Compared with the existing technology where the tool holder 7 is connected by a cylindrical shaft, the installation direction of the tool holder 7 can be quickly confirmed and adjusted, making the installation process one step in and greatly improving the ease of replacement operation.

[0049] 3. Reduced costs. Existing technologies typically use cylindrical or tapered bore shafts to connect the tool holder 7, requiring additional anti-rotation structures, such as keys, to prevent the tool holder 7 from rotating. However, the tool holder 7 connected to the triangular shaft 701 and triangular bore 503 in this solution can prevent circumferential rotation of the tool holder 7 after installation through its own structural shape, eliminating the need for additional anti-rotation components. This makes the overall structure simpler and more compact, reducing not only the manufacturing and assembly processes and costs of parts, but also the maintenance costs caused by damage to anti-rotation components.

[0050] The above are merely embodiments of this utility model, and the utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A roll-milling compound tool holder, characterized by: A roll milling compound tool holder, comprising a tool seat and a tool bar fixed on the tool seat; the tool seat comprises a base and a connecting head fixed on the upper end of the base, the connecting head is a cuboid structure, a through three-angled hole is horizontally arranged on the connecting head, a vertical through hole and a threaded hole are arranged on the upper end surface of the connecting head, the through hole and the threaded hole are communicated with the three-angled hole, a latch is arranged in the through hole, and a limiting screw is arranged in the threaded hole; the tool bar comprises a threaded section, a light bar section and a connecting section fixed in sequence, a three-angled shaft is arranged on the end of the connecting section away from the light bar section, the shape of the three-angled shaft is matched with the three-angled hole, a groove is further arranged on the three-angled shaft, and the bottom end of the limiting screw is located in the groove.

2. A hybrid roll-milling tool holder according to claim 1, characterized in that: A vertical via hole is arranged on the three-angled shaft, and the lower end of the latch extends into the via hole.

3. A hybrid roll-milling tool holder according to claim 2, characterized in that: A key groove is arranged on the connecting section, and the key groove is located on the same straight line with the groove on the three-angled shaft.

4. A hybrid roll-milling tool holder according to claim 3, characterized in that: The base comprises a cross beam, a longitudinal beam fixed on the cross beam, a stand column fixed on the longitudinal beam, and a reinforcing rib fixed at the connection between the longitudinal beam and the stand column, and the connecting head is fixed on the top end of the stand column.

5. A hybrid roll-milling tool holder according to claim 4, characterized in that: The light bar section of the tool bar is provided with a waist-shaped groove, and a long key is arranged in the waist-shaped groove.

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