Knife handle and machining and grinding tool applying same

Abstract

The utility model discloses a cutter handle and a machining and grinding tool applying the cutter handle, and belongs to the technical field of grinding tools. The cutter handle comprises a connecting handle, a connecting sleeve and a tensioning sleeve; the connecting handle comprises a positioning shaft; the connecting sleeve comprises a positioning part, and the positioning part is arranged on the outer side of the positioning shaft in a sleeving mode. A plurality of expansion parts are arranged on the end face of the outer end of the positioning part, every two adjacent expansion parts are arranged at intervals, the expansion parts are distributed in the circumferential direction with the positioning shaft as the center, and expansion cavities are formed in the expansion parts; the tensioning sleeve is positioned in the expansion cavity and sleeves the outer side of the positioning shaft; the machining and grinding tool comprises a grinding wheel and the tool handle. The grinding wheel is sleeved outside the positioning part and the expansion part, and the connecting sleeve, the connecting handle and the grinding wheel are fixedly connected after the expansion sleeve expands. The cutter handle is simple in structure and low in cost, and the working procedure of outer circle grinding or inner hole grinding can be achieved through the milling function of a machine tool.

Description

Technical Field

[0001] This utility model relates to the field of grinding tool technology, specifically to a tool holder and its application in machining and grinding. Background Technology

[0002] In engineering machinery, for operations requiring grinding of external diameters or internal holes during parts machining, since milling machines currently lack grinding heads that can be used as cutting tools, the grinding of external diameters and internal holes is generally separated into a single process and performed on a separate grinding machine. However, generally speaking, many parts require grinding of only a few external diameters or internal holes. Performing the grinding of external diameters and internal holes separately on a separate grinding machine adds an extra step and an extra part clamping operation; the overall process for the part becomes complex, the machining time is long, and the production efficiency is low. Summary of the Invention

[0003] To address the problems existing in the prior art, this utility model provides a tool holder and its application in machining and grinding. The tool holder has a simple structure and low cost, and the milling function of the machine tool can solve the process of grinding the outer circle or grinding the inner hole.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] On the one hand, this utility model provides a knife handle, including a connecting handle, a connecting sleeve, and a tensioning sleeve;

[0006] The connecting handle includes a positioning shaft;

[0007] The connecting sleeve includes a positioning part, which is fitted onto the outside of the positioning shaft; the end face of the outer end of the positioning part is provided with a plurality of expansion parts, the expansion parts extend axially and adjacent expansion parts are spaced apart, the plurality of expansion parts are distributed in the circumferential direction with the positioning shaft as the center, and form an expansion cavity inside;

[0008] The tensioning sleeve is located inside the expansion cavity and is sleeved on the outside of the positioning shaft;

[0009] In use, the cutting tool is fitted outside the positioning part and the expansion part, and the expansion sleeve expands to tightly connect the positioning shaft, the expansion part and the cutting tool.

[0010] In one of the aforementioned tool holders, a pressure cap and a pressure cap connector are also included. The pressure cap is fixed on the positioning shaft by the pressure cap connector and is limited at the outer end of the tool.

[0011] In one of the aforementioned knife handles, the pressure cap includes a second limiting portion and a mating portion. The second limiting portion extends radially outward from the positioning portion and limits the outer end of the knife. The mating portion is located on the end face of the inner end of the second limiting portion and extends into the expansion cavity.

[0012] And / or, a first connecting hole is provided on the end face of the outer end of the positioning shaft, and the pressure cap connector is detachably connected to the first connecting hole.

[0013] In one of the aforementioned knife handles, a first limiting portion is provided on the outer surface of the positioning portion, and the first limiting portion extends radially outward from the positioning portion.

[0014] In one of the tool holders described above, the connecting shank includes a tapered shank and a base connected as one piece, the tapered shank being used to connect to a machine tool; the positioning shaft is fixed to the end face of the outer end of the base.

[0015] In one of the aforementioned tool holders, the outer diameter of the positioning shaft is smaller than the outer diameter of the base, a first positioning surface is formed on the end face of the outer end of the base, and the end face of the inner end of the positioning part is in contact with the first positioning surface.

[0016] In one of the aforementioned knife handles, the expansion portion is disposed radially outside the end face of the positioning portion, the inner diameter of the expansion cavity is larger than the inner diameter of the positioning hole of the positioning portion, and a support surface is formed on the end face of the positioning portion; the tensioning sleeve abuts against the support surface;

[0017] And / or, the expansion portion has a recess on its side facing the expansion cavity, and the recess is located near the positioning portion.

[0018] In one of the aforementioned tool holders, the tensioning sleeve is an SSB type tensioning sleeve.

[0019] On the other hand, this utility model provides a machining and grinding tool, including a grinding wheel and the aforementioned tool holder; the grinding wheel is sleeved on the outside of the positioning part and the expansion part, and the tensioning sleeve expands to fix the connecting sleeve, the connecting handle and the grinding wheel in a fixed connection.

[0020] In the aforementioned machining and grinding tool, a first countersunk hole is provided in the center of the end face of the grinding wheel on the side away from the connecting shank;

[0021] And / or, the grinding wheel has a second countersunk hole centered on one end face facing the connecting handle.

[0022] The beneficial effects of this utility model are as follows:

[0023] The tool holder can be fixedly connected to the tool sleeved on the outside of the connecting sleeve and the connecting handle located on the inside of the connecting sleeve by using a tensioning sleeve, which increases the stability of the grinding wheel and eliminates the phenomenon of slippage caused by excessive grinding force when the grinding wheel is grinding the workpiece, thus stabilizing the grinding process.

[0024] The structure of the tapered shank and skirt of the connecting shank is the same as that of the milling cutter shank, thus realizing the transformation of the grinding wheel to the milling cutter shank, transforming the milling function of the machine tool into the grinding function, expanding the processing function of the machine tool, and reducing the processing steps of the parts.

[0025] The connecting sleeve and the pressure cap form a limiting and clamping mechanism at both ends of the grinding wheel, which enhances the rigidity and stability of the grinding wheel and improves processing efficiency.

[0026] The connecting handle has a simple and practical structure, using a standard expansion sleeve added to a discarded tool holder, resulting in low cost. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the knife handle of this utility model;

[0028] Figure 2 This is a front view of the knife handle of this utility model;

[0029] Figure 3 for Figure 2 Sectional view of section AA;

[0030] Figure 4 This is a cross-sectional structural diagram of the machining and grinding tool of this utility model.

[0031] In the picture:

[0032] 100-Tool holder; 101-Tapered shank; 102-Skirt; 103-Base; 104-Positioning shaft; 105-First connecting hole; 106-First positioning surface;

[0033] 200-Connecting sleeve; 201-First limiting part; 202-Positioning part; 203-Expansion part; 204-Gap; 205-Recess; 206-Positioning hole; 207-Supporting surface;

[0034] 300 - Pressure cap; 301 - Second limiting part; 302 - Connecting part;

[0035] 400-Tightening Selling;

[0036] 500 - Gland connector;

[0037] 600 - Grinding wheel; 601 - First countersunk hole; 602 - Second countersunk hole. Detailed Implementation

[0038] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0039] On the one hand, please refer to Figures 1-3This invention provides an embodiment of a tool holder, comprising a connecting shank 100, a connecting sleeve 200, a tensioning sleeve 400, a pressure cap 300, and a pressure cap connector 500. In the following description, the end of the tool holder connected to the machine tool is designated as the inner end, and the end opposite the inner end is designated as the outer end. The connecting shank 100 is composed of a tapered shank 101, a base 103, and a positioning shaft 104 connected in sequence; the end containing the tapered shank 101 is the inner end of the connecting shank 100, and the end containing the positioning shaft 104 is the outer end of the connecting shank 100. A skirt 102 is provided on the outer surface of the tapered shank 101, adjacent to the base 103; the skirt 102 has a locking groove, and the tapered shank 101 cooperates with the skirt 102 to achieve a stable connection with the machine tool. The tapered shank 101, skirt 102, base 103, and positioning shaft 104 are coaxial, preferably an integral structure. Preferably, the outer diameter of the positioning shaft 104 is smaller than the outer diameter of the base 103, and a first positioning surface 106 is formed on the end face of the base 103 connected to the positioning shaft 104.

[0040] The connecting sleeve 200 includes a positioning part 202, which is annular and fitted onto the outside of the positioning shaft 104. Specifically, the positioning part 202 has a positioning hole 206 that matches the positioning shaft 104, and the positioning shaft 104 is located within the positioning hole 206. The two work together to position the connecting sleeve 200. The inner end face of the positioning part 202 is in contact with the first positioning surface 106, and the outer end face is provided with a plurality of expansion parts 203. The expansion parts 203 extend axially, and there is a gap 204 between two adjacent expansion parts 203, that is, two adjacent expansion parts 203 are spaced apart, so that the expansion parts 203 can expand radially outward. The plurality of expansion parts 203 are distributed in the circumferential direction with the axis of the positioning part 202 as the center, forming an expansion cavity inside.

[0041] Preferably, the expansion portion 203 is disposed radially outside the end face of the positioning portion 202. The inner diameter of the expansion cavity is larger than the inner diameter of the positioning hole 206, thus forming a support surface 207 on the outer end face of the positioning portion 202, which can position the tensioning sleeve 400. The side of the expansion portion 203 facing the expansion cavity is provided with a recess 205. The recess 205 is disposed close to the positioning portion 202, allowing the expansion portion 203 to have sufficient expansion deformation and ensuring that the expansion portion 203 has sufficient connection strength.

[0042] Furthermore, a first limiting part 201 is provided on the outer side of the positioning part 202. The first limiting part 201 extends radially upward to the outer side of the positioning part 202 and can be supported on the end face of the inner end of the tool to limit the inner end of the tool.

[0043] The tensioning sleeve 400 is located inside the expansion cavity, sleeved on the outside of the positioning shaft 104, and the end face of the inner end of the tensioning sleeve 400 abuts against the support surface 207. The tensioning sleeve 400 is preferably an SSB type tensioning sleeve, but other models or structures can also be used, as long as they meet the requirement that after tensioning, its inner diameter shrinks to achieve a tight connection with the positioning shaft 104, and its outer diameter increases to push the expansion part 203 to expand outward.

[0044] The pressure cap 300 is fixed to the positioning shaft 104 by the pressure cap connector 500, forming a limit on the end face of the outer end of the tool; specifically, the end face of the outer end of the positioning shaft 104 is provided with a first connecting hole 105, which is a threaded hole; the pressure cap connector 500 is a bolt, screw, etc.; the pressure cap connector 500 is threadedly connected to the first connecting hole 105.

[0045] The preferred pressure cap 300 includes a second limiting portion 301 and a mating portion 302. The second limiting portion 301 extends radially outward from the positioning portion 202, thus forming a clamping space between the first limiting portion 201 and the second limiting portion 301 for clamping a disc-shaped tool. The mating portion 302 is located on the end face of the inner end of the second limiting portion 301 and extends into the expansion cavity.

[0046] The aforementioned connecting shank 100 is similar in structure to that of a traditional CNC milling cutter shank, particularly the tapered shank 101 and the skirt 102. Therefore, the shank of this application can be used in traditional milling and turning machines, boring and milling machines, and other similar equipment. Simultaneously, the connecting shank 100 can also be modified from an old milling cutter or milling cutter shank, provided that the tapered shank 101 and skirt 102 of the old milling cutter or milling cutter shank are intact and usable. For example, when modifying an old milling cutter or milling cutter shank, the diameter of the front end of the old milling cutter or milling cutter shank is first modified to transition with the inner diameter of the tensioning sleeve 400. The tolerance design is H7 / n6 to ensure good coaxiality of the overall structure, ensuring good rigidity and stability of the tool during high-speed rotation. The tensioning sleeve 400 adopts an SSB type tensioning sleeve, and the front end of the positioning shaft 104 is designed with a threaded hole for use as a connecting cover 300.

[0047] On the other hand, please refer to Figure 4 This is an embodiment of the machining and grinding tool provided by the present invention, including a grinding wheel 600 and the aforementioned tool holder; the grinding wheel 600 is sleeved on the outside of the positioning part 202 and the expansion part 203, and after the tensioning sleeve 400 expands, it fixes the connecting sleeve 200, the connecting handle 100 and the grinding wheel 600; the first limiting part 201 of the connecting sleeve 200 and the second limiting part 301 of the pressure cover 300 form clamping and fixing at the inner end and the outer end of the grinding wheel 600, respectively.

[0048] Because the inner bore precision of the grinding wheel 600 is slightly lower, the connecting sleeve 200 has a clearance fit with the inner bore of the grinding wheel 600. The coaxiality of the connecting sleeve 200 before and after tensioning is high, effectively ensuring the assembly coaxiality of the grinding wheel 600. Since the tool holder can be used on traditional turning and milling machines, boring and milling machines, the milling function of the equipment can be used to solve the process of grinding the outer diameter or inner bore of parts, reducing the part clamping steps and improving production efficiency.

[0049] When assembling machining and grinding tools, first, the connecting sleeve 200 is placed on the outside of the positioning shaft 104, and then the grinding wheel 600 is placed on the outside of the positioning part 202 and the expansion part 203, with the first limiting part 201 supporting the grinding wheel 600; then, the tensioning sleeve 400 is installed in the expansion cavity of the connecting sleeve 200 and tightened, tightly connecting the connecting sleeve 200, the grinding wheel 600, and the connecting shank 100 together; finally, the pressure cap 300 is fixed on the positioning shaft 104, reinforcing the connection of the connecting sleeve 200, the grinding wheel 600, and the connecting shank 100 from the end face, providing double protection for the stability of the grinding wheel 600.

[0050] Furthermore, the outer and inner ends of the grinding wheel 600 are respectively provided with a first countersunk hole 601 and a second countersunk hole 602. The position of the first countersunk hole 601 corresponds to the position of the pressure cap 300, and the inner diameter of the first countersunk hole 601 is larger than the outer diameter of the pressure cap 300. The pressure cap 300 is completely accommodated in the first countersunk hole 601. The position of the second countersunk hole 602 corresponds to the position of the first limiting part 201, and the inner diameter of the second countersunk hole 602 is larger than the outer diameter of the first limiting part 201. The first limiting part 201 is completely accommodated in the second countersunk hole 602. The pressure cap 300 and the first limiting part 201 are hidden inside the grinding wheel 600, which effectively avoids gaps on the end face of the workpiece. The grinding wheel 600 has greater versatility in grinding outer circles and inner holes.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A shank characterized in that, The utility model relates to a connecting handle (100), a connecting sleeve (200) and a tension sleeve (400) are included. The connecting handle (100) includes a positioning shaft (104). The connecting sleeve (200) includes a positioning part (202), which is sleeved on the outer side of the positioning shaft (104); a plurality of expansion parts (203) are arranged on the end face of the outer end of the positioning part (202), the expansion parts (203) extend axially and are arranged at intervals, the plurality of expansion parts (203) are distributed in the circumferential direction with the positioning shaft (104) as the center, and an expansion cavity is formed inside. The tension sleeve (400) is located in the expansion cavity and is sleeved on the outer side of the positioning shaft (104). In use, a tool is sleeved on the outer side of the positioning part (202) and the expansion part (203), and the tension sleeve (400) expands to tightly connect the positioning shaft (104), the expansion part (203) and the tool.

2. A shank according to claim 1, characterized in that The utility model further includes a gland (300) and a gland connecting piece (500), the gland (300) is fixed on the positioning shaft (104) through the gland connecting piece (500) and is located at the outer end of the tool.

3. A shank according to claim 2, wherein The gland (300) includes a second limiting part (301) and a butt joint part (302), the second limiting part (301) extends radially to the outer side of the positioning part (202) and is located at the outer end of the tool; the butt joint part (302) is arranged on the end face of the inner end of the second limiting part (301) and extends into the expansion cavity. And / or, a first connecting hole (105) is arranged on the end face of the outer end of the positioning shaft (104), and the gland connecting piece (500) is detachably connected with the first connecting hole (105).

4. The tool holder according to claim 1, wherein A first limiting part (201) is arranged on the outer side of the positioning part (202) and extends radially to the outer side of the positioning part (202).

5. The tool holder according to claim 1, wherein The connecting handle (100) includes a taper handle (101) and a base (103) connected as a whole, the taper handle (101) is used for connecting a machine tool, and the positioning shaft (104) is fixed on the end face of the outer end of the base (103).

6. A shank according to claim 5, wherein The outer diameter of the positioning shaft (104) is smaller than the outer diameter of the base (103), a first positioning face (106) is formed on the end face of the outer end of the base (103), and the end face of the inner end of the positioning part (202) is attached to the first positioning face (106).

7. The tool holder according to claim 1, wherein The expansion part (203) is arranged on the radial outer side of the end face of the positioning part (202), the inner diameter of the expansion cavity is greater than the inner diameter of the positioning hole (206) of the positioning part (202), a supporting face (207) is formed on the end face of the positioning part (202), and the tension sleeve (400) is in abutment with the supporting face (207). And / or, a recess (205) is arranged on the side face of the expansion part (203) facing the expansion cavity, and the recess (205) is arranged close to the positioning part (202).

8. The tool holder according to claim 1, wherein The tension sleeve (400) is an SSB type tension sleeve.

9. A machine grinding tool, characterized by The tool holder comprises a grinding wheel (600) and the tool holder as claimed in any one of claims 1-8; the grinding wheel (600) is sleeved outside the positioning portion (202) and the expansion portion (203), and the expansion sleeve (400) is used to fix and connect the connecting sleeve (200), the connecting holder (100) and the grinding wheel (600) after expansion.

10. A machine grinding tool according to claim 9, characterized in that A first counterbore (601) is arranged in the center of the side end face of the grinding wheel (600) away from the connecting holder (100). And / or, a second counterbore (602) is arranged in the center of the side end face of the grinding wheel (600) towards the connecting holder (100).

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