A retractable cutting tool and a method for replacing the cutting head.

Abstract

This invention discloses a retractable cutting tool and a method for replacing the cutting head, aiming to solve the shortcomings of tools that cannot adjust the cutting depth and have high tool replacement costs. The invention includes a tool holder, a retractable blade plate mounted on the tool holder, and a cutting head mounted on the end of the blade plate, the cutting head being detachably mounted on the blade plate. The tool of this patent application allows for adjustment of the cutting depth of the cutting head to meet different cutting depth requirements, and the detachable cutting head allows for adjustment of different cutting widths simply by replacing the cutting head, resulting in low cost.

Description

Technical Field

[0001] This invention relates to a cutting tool, and more specifically, to a retractable cutting tool and a method for changing the cutting head. Background Technology

[0002] Currently, cutting tools are required for machining shaft parts. During the cutting process, the tool moves radially, causing the shaft part to rotate, thereby performing grooving and cutting. Traditional cutting tools have a fixed cutting depth that cannot be adjusted, which can lead to insufficient cutting depth, resulting in the inability to create deep grooves or completely cut the shaft part. Furthermore, the tool width is fixed, requiring different tools to meet different width requirements, leading to high costs. Summary of the Invention

[0003] To overcome the above shortcomings, the present invention provides a retractable cutting tool and a tool head replacement method, which can adjust the cutting depth of the tool head to meet the usage requirements of different cutting depths. Moreover, the tool head is detachable, and different cutting widths can be adjusted simply by replacing the tool head, which is low in cost.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a retractable cutting tool, including a tool holder, a retractable blade plate installed on the tool holder, a blade head installed at the end of the blade plate, and the blade head being detachably installed on the blade plate.

[0005] When using the cutting tool, the tool holder is fixed to the tool post on the machine tool. The tool plate, mounted on the tool holder, is telescopic, allowing adjustment of the cutting depth to meet different usage requirements. The tool head is detachably mounted on the tool plate; when the tool head wears out, only the tool head needs to be replaced, rather than the entire tool, thus reducing costs.

[0006] The cutting tool of this patent application can adjust the cutting depth of the cutting head to meet the requirements of different cutting depths. Moreover, the cutting head is detachable, and different cutting widths can be adjusted simply by replacing the cutting head, which is low in cost.

[0007] Preferably, a pressure block is installed on the tool holder, and a clamping groove is formed between the pressure block and the tool holder. The tool plate is clamped and installed in the clamping groove, and the tool plate moves telescopically along the clamping groove.

[0008] The blade plate is installed in the clamping groove, which is convenient and reliable. After the blade plate moves into place in the clamping groove, the locking block can be used to position the blade plate.

[0009] Preferably, the clamping groove is inclined to form an anti-detachment slope on both sides, and a clamping slope is provided on the side of the blade plate corresponding to the anti-detachment slope, so that the anti-detachment slope and the clamping slope are fitted together and clamped.

[0010] The anti-detachment ramp and clamping ramp can position the blade plate and prevent it from detaching from the blade holder.

[0011] Preferably, two clamping ramps are provided on the side of the blade and the same anti-detachment ramp, with the two clamping ramps arranged opposite each other.

[0012] Two opposing clamping bevels are provided on the same side of the blade plate, so that the blade plate can be inserted into the clamping groove from both directions. The installation of the blade plate and the blade holder is more convenient, and it is not necessary to select a specific end to insert into the clamping groove.

[0013] Preferably, an ejector spring is installed between the pressure block and the cutter holder, and the pressure block and the cutter holder are connected and fastened by fastening screws.

[0014] Tightening the fastening screws clamps the blade plate with the pressure block, thus fixing the blade plate in place. Loosening the fastening screws allows the pressure block to move away from the blade plate under the action of the ejector spring, increasing the width of the clamping groove. This allows the blade plate to be released and extend or retract.

[0015] Preferably, the tool holder and the pressure block are provided with inclined support slopes, and the pressure block and the support slopes are provided with positioning slopes, and the positioning slopes can fit into the support slopes.

[0016] The inclined support surface facilitates the stable and reliable installation of the pressure block, preventing lateral movement during the pressing process.

[0017] Preferably, neither the blade holder nor the pressure block side protrudes above the blade plate side.

[0018] After the workpiece is clamped onto the chuck, the cutter head should be as close to the chuck as possible. This will prevent the last piece of scrap from being too long, thus reducing costs. The sides of the cutter holder and the pressure block should not protrude above the sides of the cutter plate to avoid interference with the chuck.

[0019] Preferably, the blade end is provided with a mounting groove, the blade head is fitted with the mounting groove, and a positioning structure is provided between the side wall of the mounting groove and the side of the blade head. The positioning structure includes a positioning rib and a positioning groove, and the positioning rib and the positioning groove are fitted and inserted into each other.

[0020] The cutter head is easy and reliable to install in the mounting slot, and the positioning structure prevents the cutter head from axially dislodging from the mounting slot.

[0021] Preferably, the bottom of the mounting groove on the blade plate is provided with an abutment protrusion and a notch groove, the end of the blade abuts against the abutment protrusion, and the notch groove is arc-shaped and extends to a position near the side of the blade plate.

[0022] The cutter head and the mounting slot are secured by an interference fit. The notch design allows for some flexibility at this location, making the cutter head installation easier. The abutment protrusion creates a gap between the bottom of the mounting slot and the cutter head, providing space for cutter head removal.

[0023] A method for replacing the blade head of a retractable cutting tool, comprising the following steps:

[0024] S1. Use a wrench to remove the blade head from the blade plate. The wrench is equipped with a positioning pin and a stop pin. The blade plate is equipped with a slot. The positioning pin is inserted into the slot and the stop pin is placed on the inner end of the blade head.

[0025] S2, turn the wrench, the abutment column pushes the cutter head outward, thereby removing the cutter head from the cutter plate;

[0026] S3, pre-install the new cutter head onto the cutter plate, and then adjust the position of the wrench so that the abutment pin is at the outer end of the cutter head;

[0027] S4, rotate the wrench in the opposite direction, the abutment column pushes the cutter head inward, thereby installing the cutter head onto the cutter plate;

[0028] S5, remove the wrench.

[0029] The wrench moves the cutting head, and the positioning and abutment pins on the wrench create a lever structure that saves effort during the wrench's rotation, making the installation and removal of the cutting head easier.

[0030] Compared with the prior art, the beneficial effects of the present invention are: (1) The cutting depth of the cutting head of the tool in this patent application can be adjusted to meet the requirements of different cutting depths. Moreover, the cutting head is detachable, and different cutting widths can be adjusted by simply replacing the cutting head, which is low cost; (2) The cutting plate is installed in the clamping groove and is positioned by the inclined surface to prevent the cutting plate from falling off the cutting seat; (3) The cutting plate can be inserted into the clamping groove from both directions, which is convenient for installation; (4) The sides of the cutting seat and the pressure block are not higher than the sides of the cutting plate, which can avoid interference with the chuck; (5) The cutting head can be installed and removed by a wrench, which is convenient for replacement. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the working state of the present invention;

[0032] Figure 2 This is a schematic diagram of the present invention installed on the tool holder of the machine body;

[0033] Figure 3 This is a cross-sectional view of the present invention mounted on the tool holder of the machine body;

[0034] Figure 4 This is an exploded view of the present invention;

[0035] Figure 5 This is a schematic diagram of the blade mounting of the present invention;

[0036] Figure 6This is a schematic diagram of the blade installation in Embodiment 2 of the present invention;

[0037] Figure 7 This is a schematic diagram of the structure of the wrench according to Embodiment 2 of the present invention;

[0038] In the diagram: 1. Blade holder, 2. Blade plate, 3. Blade head, 4. Mounting groove, 5. Positioning rib, 6. Positioning groove, 7. Abutment protrusion, 8. Notch groove, 9. Slot, 10. Abutment protrusion, 11. Pressure block, 12. Ejection spring, 13. Fastening screw, 14. Supporting slope, 15. Positioning slope, 16. Clamping groove, 17. Anti-detachment slope, 18. Clamping slope, 19. Blade holder, 21. Clamping groove, 22. Wrench, 23. Positioning post, 24. Abutment post, 25. Spray hole, 26. Connector, 27. Spherical nozzle, 28. Nozzle retaining ring, 29. Positioning plate, 30. Positioning rod, 31. Vertical plate, 32. Guide groove, 33. Protrusion. Detailed Implementation

[0039] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0040] Example 1: A retractable cutting tool (see appendix) Figure 1 To be continued Figure 5 The device includes a tool holder 1, a retractable tool plate 2 mounted on the tool holder, and a tool head 3 mounted on the end of the tool plate. Tool heads are mounted on both ends of the tool plate and are detachably mounted on the tool plate. A mounting groove 4 is provided at the end of the tool plate, and the tool head is fitted into the mounting groove. A positioning structure is provided between the side wall of the mounting groove and the side of the tool head. The positioning structure includes a positioning rib 5 and a positioning groove 6, which are fitted into the positioning groove. Positioning ribs and positioning grooves are provided on both sides of the mounting groove, and positioning grooves and positioning ribs are provided on both sides of the tool head. Both the positioning ribs and positioning grooves are V-shaped. An abutment protrusion 7 and a notch 8 are provided at the bottom of the mounting groove on the tool plate. The end of the tool head abuts against the abutment protrusion, and the notch is arc-shaped and extends to a position near the side of the tool plate. Waist-shaped slots 9 are provided at both ends of the tool plate to facilitate the insertion and force application of a wrench when installing or removing the tool head. The mounting groove is inclined relative to the extension and retraction direction of the blade plate and is located at the corner of the blade plate. An abutting protrusion 10 is provided at the outer end of the blade head, which abuts against the outer wall of the blade plate. The width of the blade head is greater than the thickness of the blade plate, and the two sides of the blade head are higher than the two sides of the blade plate.

[0041] A pressure block 11 is installed on the tool holder, and an ejector spring 12 is installed between the pressure block and the tool holder. The pressure block and the tool holder are connected and fastened by a fastening screw 13. The ejector spring is fitted onto the fastening screw. A support slope 14 is provided on the tool holder corresponding to the pressure block, and a positioning slope 15 is provided on the pressure block corresponding to the support slope. The positioning slope can fit with the support slope. A clamping groove 16 is formed between the pressure block and the tool holder. The tool plate is clamped and installed in the clamping groove, and the tool plate moves along the clamping groove. Neither the side of the tool holder nor the side of the pressure block is higher than the side of the tool plate. The clamping groove is inclined relative to the two side walls to form an anti-detachment slope 17. One anti-detachment slope is provided on the tool holder, and the other anti-detachment slope is provided on the pressure block. A notch is provided on the end face of the tool holder, and the pressure block is connected to the notch. The pressure block and the notch together form the clamping groove. A clamping slope 18 is provided on the side of the tool plate corresponding to the anti-detachment slope. The anti-detachment slope and the clamping slope fit together and are clamped. Two clamping ramps are provided on the side of the blade plate and on the same anti-detachment ramp, with the two clamping ramps facing each other.

[0042] A water spray hole 25 is provided on the cutter head. A connector 26 is installed at one end of the water spray hole, and a spherical nozzle 27 and a nozzle retaining ring 28 are installed at the other end of the water spray hole. The nozzle retaining ring positions the spherical nozzle. A water outlet hole is provided on the spherical nozzle, and the water outlet hole is oriented towards the cutter head.

[0043] When using the tool, the tool holder is fixed on the tool post 19 of the machine tool. Several clamping screws 20 are connected to the tool holder. The tool post is provided with a clamping groove 21. One side of the tool holder is placed in the clamping groove. The clamping screws are rotated so that they abut against the side wall of the clamping groove, thereby achieving the fastening of the tool holder and the tool post.

[0044] A method for replacing the blade head of a retractable cutting tool, comprising the following steps:

[0045] S1. Use wrench 22 to remove the blade head from the blade plate. The wrench is equipped with a positioning pin 23 and abutment pin 24. The blade plate is equipped with a slot. The positioning pin is inserted into the slot and the abutment pin is placed on the inner end of the blade head.

[0046] S2, turn the wrench, the abutment column pushes the cutter head outward, thereby removing the cutter head from the cutter plate;

[0047] S3, pre-install the new cutter head into the mounting slot on the cutter plate, and then adjust the position of the wrench so that the abutment pin is at the outer end of the cutter head;

[0048] S4, rotate the wrench in the opposite direction, the abutment column pushes the cutter head inward, thereby installing the cutter head onto the cutter plate;

[0049] S5, remove the wrench.

[0050] Example 2: A method for replacing the blade head of a retractable cutting tool (see appendix) Figure 6 Appendix Figure 7The steps are similar to those in Example 1, with the main difference being that a positioning plate 29 is installed on the wrench in this example. The positioning plate is rotatable and has a positioning rod 30 and a vertical plate 31. A guide groove 32 is provided on the side wall of the vertical plate, which is compatible with the positioning rib on the side wall of the cutter head. A protruding strip 33 is provided on the positioning plate. During operation S3, the cutter head is first loaded onto the positioning plate, and the positioning rib on the cutter head is compatible with the guide groove on the vertical plate, positioning the cutter head between the vertical plate and the positioning rod. Then, the cutter head is pre-installed into the mounting groove on the cutter plate, during which the protruding strip adheres to the surface of the cutter plate for positioning. Afterward, the wrench is rotated so that the abutment post is against the outer end of the cutter head, and the abutment post pushes the cutter head inward, thereby installing the cutter head onto the cutter plate. Finally, the wrench is rotated outward to separate the positioning plate and the cutter head, and the wrench is removed from the cutter plate. Other steps are the same as in Example 1.

[0051] The positioning plate facilitates the positioning of the cutting head during installation, making it easier to insert the cutting head into the mounting slot at the initial stage. Furthermore, the positioning plate rotates on the wrench, allowing for self-adjustment during installation and preventing the cutting head from getting stuck. The positioning plate features guide grooves, positioning rods, and protrusions to facilitate the positioning of the cutting head, ensuring precise installation into the mounting slot.

[0052] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications may be made without departing from the technical solutions described in the claims.

Claims

1. A method for replacing the blade head of a retractable cutting tool, the cutting tool including a tool holder, a retractable blade plate mounted on the tool holder, a blade head mounted on the end of the blade plate, the blade head being detachably mounted on the blade plate; a mounting groove is provided at the end of the blade plate, the blade head is fitted into the mounting groove, a positioning structure is provided between the side wall of the mounting groove and the side of the blade head, the positioning structure including a V-shaped positioning rib and a positioning groove, the positioning rib fitting into the positioning groove; characterized in that... Includes the following steps: S1. Use a wrench to remove the cutter head from the cutter plate. The wrench is equipped with a positioning post, abutment post, and a rotating positioning plate. The cutter plate is equipped with a slot, the positioning post is inserted into the slot, and the abutment post is placed on the inner end of the cutter head. The positioning plate is equipped with a positioning rod and a vertical plate. The side wall of the vertical plate is equipped with a guide groove, which is matched with the positioning rib on the side wall of the cutter head. The positioning plate is equipped with a protruding strip. S2, turn the wrench, the abutment column pushes the cutter head outward, thereby removing the cutter head from the cutter plate; S3, load the new cutter head onto the positioning plate. The positioning rib on the cutter head matches the guide groove on the vertical plate. The cutter head is positioned between the vertical plate and the positioning rod. Then, pre-install the cutter head into the mounting groove on the cutter plate. During this process, the rib adheres to the surface of the cutter plate to achieve positioning. Then, adjust the position of the wrench so that the abutment post is at the outer end of the cutter head. S4, rotate the wrench in the opposite direction, the abutment column pushes the cutter head inward, thereby installing the cutter head onto the cutter plate; S5, remove the wrench.

2. The method for changing the blade head of the retractable cutting tool according to claim 1, characterized in that, A pressure block is installed on the tool holder, and a clamping groove is formed between the pressure block and the tool holder. The tool plate is clamped and installed in the clamping groove, and the tool plate moves along the clamping groove.

3. The method for changing the blade head of the retractable cutting tool according to claim 2, characterized in that, The clamping groove is inclined relative to the two side walls to form an anti-detachment slope, and the blade side and the anti-detachment slope are respectively provided with a clamping slope, and the anti-detachment slope and the clamping slope are fitted together and clamped.

4. The method for changing the blade head of the retractable cutting tool according to claim 3, characterized in that, Two clamping ramps are provided on the side of the blade plate and on the same anti-detachment ramp, with the two clamping ramps facing each other.

5. The method for changing the blade head of the retractable cutting tool according to claim 2, characterized in that, An ejector spring is installed between the pressure block and the tool holder, and the pressure block and the tool holder are connected and secured by fastening screws.

6. The method for changing the blade head of the retractable cutting tool according to claim 2, characterized in that, The tool holder and the pressure block are provided with inclined support slopes, and the pressure block and the support slopes are provided with positioning slopes, which can fit together with the support slopes.

7. The method for changing the blade head of the retractable cutting tool according to claim 2, characterized in that, The sides of the blade holder and the pressure block do not protrude above the sides of the blade plate.

8. The method for changing the blade head of the retractable cutting tool according to claim 1, characterized in that, The bottom of the mounting groove on the blade plate is provided with an abutment protrusion and a notch groove. The end of the blade abuts against the abutment protrusion, and the notch groove is arc-shaped and extends to a position near the side of the blade plate.

Images