Diamond pre-milling cutter with replaceable teeth

Abstract

The utility model relates to the field of woodworking tools. The diamond pre-milling cutter with the replaceable teeth comprises a main cutter body with a mounting hole in the center and a tooth seat ring matched with the main cutter body and arranged outside the main cutter body in a sleeving mode, and the tooth seat ring is fixedly connected with the main cutter body; a plurality of tooth holes penetrating through the inner surface and the outer surface of the tooth seat ring are formed in the tooth seat ring, and the tooth holes are matched with tooth seats of the cutter teeth in shape and size. The inner side wall of the tooth hole and the outer side wall of the main cutter body jointly form a cutter tooth mounting groove for mounting cutter teeth; a first screw hole is further formed in the outer side wall, corresponding to each cutter tooth mounting groove, of the main cutter body, and a first screw is matched with the first screw hole; tooth holders of the cutter teeth are fastened in the cutter tooth mounting grooves through first screws. According to the utility model, the processing is convenient, the cutter teeth are convenient to replace, and the positioning precision of the cutter teeth is ensured.

Description

Technical Field

[0001] The utility model relates to the field of woodworking tools, in particular to a pre-milling cutter. Background Art

[0002] The disc pre-milling cutter is a very important tool in the edge banding process of panel furniture. It mills the edge of the board before gluing the board to make the edge of the board sufficiently flat, thereby achieving a better edge banding effect. The pre-milling cutter is used frequently, the milling volume is large, and the quality of the board varies. The teeth will break from time to time, and the teeth must be replaced at this time.

[0003] At present, most of the pre-milling cutters on the market adopt the form of fixed teeth, that is, a tooth seat for welding diamond blades is processed on the side of the base, and the diamond blades are welded and fixed on the tooth seat. The tooth seat and the diamond blade together constitute the cutter teeth. In this way, when changing teeth, it is necessary to knock off the damaged diamond blade first, and then go through a series of steps such as sanding, welding, and grinding to complete the entire cutter tooth replacement work, which leads to a huge waste of time. Therefore, some existing technologies also appear in which the cutter teeth are screwed to the cutter body by bolts. When a certain cutter tooth is damaged, the cutter teeth are directly replaced as a whole. This method can greatly improve the efficiency of tooth replacement because the tooth seat and diamond blade of the cutter teeth can be welded and formed in advance, and sharpened, and can be directly replaced as a whole.

[0004] like Figure 1 As shown, Chinese utility model patent: 201620549393.6 discloses such a setting method, which includes a cutter body 1, a mounting hole 2, a cutter tooth fixing groove 4 is machined on the cutter body 1, and the cutter tooth body 3 (including the blade 6, the chip groove 7, etc. thereon) is fixed in the cutter tooth fixing groove 4 by a fastening screw 5. However, this method has several major disadvantages: 1. Since the cutter tooth fixing groove 4 plays the role of an installation base on the one hand, and also plays the role of positioning the cutter tooth body 3 on the other hand, and its machining accuracy directly affects the installation accuracy of the cutter tooth body 3, the above scheme directly uses a CNC machine tool to machine the cutter tooth fixing groove 4 on the cutter body 1, and it is necessary to achieve excellent control on the contour accuracy, groove bottom depth, and flatness of the cutter tooth fixing groove 4, resulting in great difficulty in processing; the cost of the machine tool used is extremely high; 2. During long-term use, the cutter tooth fixing groove 4 will inevitably produce a certain deformation, and the positioning effect of the cutter tooth body 3 will be poor at this time, and it is not convenient for deformation calibration. Summary of the invention

[0005] The utility model aims to provide a diamond pre-milling cutter with replaceable teeth which is convenient for processing.

[0006] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is: a diamond pre-milling cutter with replaceable teeth, comprising a main cutter body with a mounting hole in the center, and a tooth seat ring which cooperates with the main cutter body and is sleeved outside the main cutter body, wherein the tooth seat ring is fixedly connected to the main cutter body;

[0007] The tooth seat ring is provided with a plurality of tooth holes penetrating the inner and outer surfaces of the tooth seat ring, and the shape and size of the tooth holes are matched with the tooth seat of the cutter tooth; the inner side wall of the tooth hole and the outer side wall of the main tool body together constitute a cutter tooth mounting groove for mounting the cutter tooth; a first screw hole is also provided on the outer side wall of the main tool body corresponding to each of the cutter tooth mounting grooves, and is adapted to be equipped with a first screw; the tooth seat of the cutter tooth is fastened in the cutter tooth mounting groove by the first screw.

[0008] Preferably, the outer edge of the upper end of the main tool body is provided with a concave shoulder, and a plurality of first key teeth are evenly arranged in a ring shape on the shoulder. The upper end of the tooth seat ring is bent inward to form a clamping ring that matches the shoulder. The clamping ring is clamped on the shoulder, and a plurality of first key grooves that mesh with the first key teeth are provided at the bottom of the clamping ring; the clamping ring and the shoulder are fixed by a second screw.

[0009] Preferably, it also includes a bottom pressure ring arranged at the lower end of the main tool body, the edge of the bottom pressure ring is evenly provided with a plurality of protrusions in a ring shape, the lower end of the gear seat ring is correspondingly provided with a plurality of bayonet sockets matching with the protrusions, the protrusions are clamped in the bayonet sockets and fixed by a plurality of third screws; the bottom pressure ring and the lower end of the main tool body are also fixed by a fourth screw.

[0010] Preferably, the gear seat ring and the bottom pressure ring are both made of ceramic.

[0011] The beneficial effects of the utility model are mainly reflected in the convenience of processing, the convenience of replacing the cutter teeth, and the guarantee of the accuracy of the cutter teeth positioning. When the utility model is processed, the main cutter body and the tooth seat ring can be processed separately and simultaneously, and then assembled after the processing is completed. Since the cutter tooth installation groove is composed of the inner wall of the tooth hole and the outer wall of the main cutter body, the groove depth of the cutter tooth installation groove is the thickness of the tooth seat ring, and the groove bottom surface of the cutter tooth installation groove is the outer side surface of the main cutter body. Therefore, when machining the tooth hole, only the accuracy of the tooth hole contour size can be considered, and there is no need to consider its drilling and milling depth. Precise processing can be achieved by directly milling a circle according to the contour line of the tooth hole on the machine tool without considering the feed depth during processing. Therefore, compared with the existing tooth replacement structure, the utility model has lower processing difficulty and higher molding accuracy. In addition, the utility model can replace the cutter teeth and the tooth seat ring, which is also convenient for subsequent maintenance and very convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of an existing disc-type pre-milling cutter with replaceable teeth;

[0013] Figure 2 It is a schematic diagram of the top view of the structure of the utility model when the blade body is not installed;

[0014] Figure 3 for Figure 2 Bottom view of

[0015] Figure 4 It is a schematic diagram of the structure of the top surface of the cutter body and the gear seat ring;

[0016] Figure 5 It is a structural schematic diagram of the bottom surface of the cutter body and the bottom pressure ring;

[0017] Figure 6 for Figure 2 Center AA view. DETAILED DESCRIPTION

[0018] like Figure 2-6 The biggest advantage of the replaceable tooth diamond pre-milling cutter shown in the figure is that it can reduce the difficulty of processing and ensure the accuracy of tooth positioning while enabling rapid tooth change operation. Figure 1 As shown, it is an existing replaceable tooth structure, but its tooth fixing groove 4 is integrally machined on the cutter body 1. When machining the tooth fixing groove 4, on the one hand, the machining accuracy must be ensured on the contour to achieve good tooth positioning, and on the other hand, the depth of the groove must be well controlled. This requires effective and accurate control of the feed depth during machining, which makes machining difficult. At the same time, due to the high difficulty of this control, the bottom surface of the tooth fixing groove 4 is usually a plane, and the diamond pre-milling cutter is a high-speed rotating part. This simple flat-bottomed groove is not conducive to the overall stability of the tooth, or has a large impact on the tooth. Although the arc bottom and other special-shaped bottoms have good stability, they pose new challenges to machining.

[0019] To this end, the utility model takes a different approach and adopts a split structure. During processing, only the contour of the blade tooth fixing groove 4 (that is, the blade tooth mounting groove 14 described below) needs to be accurately processed to ensure the overall accuracy of the blade tooth fixing groove 4. After testing, this has a significant effect on improving processing efficiency and processing accuracy.

[0020] like Figure 2 and 4 As shown in the figure, the utility model includes a main tool body 11 with a mounting hole 10 at the center, and a tooth seat ring 12 that cooperates with the main tool body 11 and is sleeved outside the main tool body 11, and the tooth seat ring 12 is fixedly connected to the main tool body 11. In other words, the tooth seat ring 12 and the main tool body 11 are split, and the tooth seat ring 12 is sleeved outside the main tool body 11. There are many specific fixing methods, for example: directly fixing through the side holes and screws on the side wall, but this method has a large shear force on the screws, which is not conducive to improving the service life.

[0021] Therefore, a better approach of the utility model may be to combine Figure 2 , 4 As shown in FIG. 6 , the outer edge of the upper end of the main tool body 11 is provided with a concave shoulder 15, and the shoulder 15 is evenly provided with a plurality of first key teeth 16 in an annular shape. The upper end of the tooth seat ring 12 is bent inward to form a clamping ring 17 that matches the shoulder 15. The clamping ring 17 is clamped on the shoulder 15, and the bottom of the clamping ring 17 is provided with a plurality of first key grooves 18 that mesh with the first key teeth 16. The clamping ring 17 is fixed to the shoulder 15 by a second screw 19. In this way, through the meshing of the first key teeth 16 and the first key grooves 18, effective transmission and dispersion of force can be achieved.

[0022] In the form of fixing the upper end of the tooth seat ring 12, a further approach can be that the utility model also includes a bottom pressure ring 20 arranged at the lower end of the main tool body 11, and the edge of the bottom pressure ring 20 is evenly provided with a plurality of protrusions 21 in a ring shape, and the lower end of the tooth seat ring 12 is correspondingly provided with a plurality of bayonet holes 22 that match the protrusions 21, and the protrusions 21 are clamped in the bayonet holes 22 and fixed by a plurality of third screws 23. The bottom pressure ring 20 and the lower end of the main tool body 11 are also fixed by a fourth screw 24. In this form, through the cooperation of the protrusion 21 and the bayonet hole 22, the torque at the upper and lower ends of the tooth seat ring 12 can be effectively dispersed, so that the overall service life is better. At the same time, the multiple fixing form of the second screw 19+the third screw 23+the fourth screw 24 also makes the overall fixation more reliable, prevents the phenomenon of falling off during high-speed operation, and ensures safety.

[0023] Regarding the installation form of the utility model knife teeth, Figure 6 As shown in , the tooth seat ring 12 is provided with a plurality of tooth holes 13 penetrating the inner and outer surfaces of the tooth seat ring 12, and the shape and size of the tooth holes 13 are matched with the tooth seat of the cutter tooth. For example, if the tooth seat of the cutter tooth is circular, the tooth hole 13 is circular; if the tooth seat of the cutter tooth is teardrop-shaped, the tooth hole 13 is a corresponding teardrop-shaped; the cutter tooth is pre-processed and formed by welding a diamond blade on the tooth seat. When the cutter tooth needs to be replaced, the screw can be removed and replaced as a whole. The inner side wall of the tooth hole 13 of the utility model and the outer side wall of the main tool body 11 together constitute a cutter tooth mounting groove 14 for mounting the cutter tooth. A first screw hole is also provided on the outer side wall of the main tool body 11 corresponding to each of the cutter tooth mounting grooves 14, and is adapted to be equipped with a first screw. The tooth seat of the cutter tooth is fastened in the cutter tooth mounting groove 14 by the first screw.

[0024] In order to further improve the performance of the utility model, a better approach of the utility model can also be that the tooth seat ring 12 and the bottom pressure ring 20 are both ceramic, and the ceramic is a high-strength modified ceramic. When the ceramic tooth seat ring 12 and the bottom pressure ring 20 are used, they can be formed by high-precision die casting and sintering, which makes the processing more convenient and the precision can be further improved. At the same time, the ceramic tooth seat ring 12 and the bottom pressure ring 20 can also be used as the protective shell of the main tool body 11, and have good corrosion resistance without electroplating treatment, and are more suitable for working under high temperature and humid working conditions.

Claims

1. A diamond pre-milling cutter with replaceable teeth, characterized in that: It comprises a main cutter body (11) with a mounting hole (10) at the center, and a tooth seat ring (12) which cooperates with the main cutter body (11) and is sleeved outside the main cutter body (11), wherein the tooth seat ring (12) is fixedly connected to the main cutter body (11); The tooth seat ring (12) is provided with a plurality of tooth holes (13) penetrating the inner and outer surfaces of the tooth seat ring (12); the shape and size of the tooth holes (13) are matched with the tooth seat of the cutter tooth; the inner side wall of the tooth hole (13) and the outer side wall of the main cutter body (11) together form a cutter tooth mounting groove (14) for mounting the cutter tooth; each of the cutter tooth mounting grooves (14) is also provided with a first screw hole on the outer side wall of the main cutter body (11) corresponding to the first screw; the tooth seat of the cutter tooth is fastened in the cutter tooth mounting groove (14) by the first screw.

2. The diamond pre-milling cutter with replaceable teeth according to claim 1, characterized in that: The outer edge of the upper end of the main tool body (11) is provided with a concave shoulder (15), and a plurality of first key teeth (16) are evenly arranged in a ring shape on the shoulder (15); the upper end of the tooth seat ring (12) is bent inward to form a clamping ring (17) that matches the shoulder (15); the clamping ring (17) is clamped on the shoulder (15), and the bottom of the clamping ring (17) is provided with a plurality of first key grooves (18) that mesh with the first key teeth (16); the clamping ring (17) and the shoulder (15) are fixed by a second screw (19).

3. The diamond pre-milling cutter with replaceable teeth according to claim 2, characterized in that: The invention also comprises a bottom pressure ring (20) arranged at the lower end of the main tool body (11), the edge of the bottom pressure ring (20) being evenly provided with a plurality of protrusions (21) in a ring shape, the lower end of the tooth seat ring (12) being correspondingly provided with a plurality of bayonet holes (22) matching with the protrusions (21), the protrusions (21) being clamped in the bayonet holes (22) and being fixed by a plurality of third screws (23); the bottom pressure ring (20) and the lower end of the main tool body (11) are also fixed by a fourth screw (24).

4. The diamond pre-milling cutter with replaceable teeth according to claim 3, characterized in that: The gear seat ring (12) and the bottom pressure ring (20) are both made of ceramic.

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