Molding cutter

Abstract

The utility model discloses a forming cutter, which comprises a cutter bar, a cutter head, a cutter shaft and a cutter head, the cutter bar comprises a first end and a second end which are opposite to each other, the cutter bar is provided with an open slot, and the open slot is arranged at the first end and obliquely extends along the axis direction of the cutter bar; the cutter part is welded to the open groove, the surface of the cutter part is attached to the groove wall of the open groove, one side of the cutter part is sheared to form an inclined shearing end, and the shearing end avoids the inclined side wall of the open groove. The problem that a small-diameter cutter is prone to being broken in the cutting process is solved.

Description

Technical Field

[0001] This utility model relates to the field of machining tool technology, and in particular to a forming tool. Background Technology

[0002] As the metal processing industry continues to grow, there is a growing need for faster and better tools, which in turn ensures higher quality control standards. For materials where economy and precision machining are paramount, MCD forming tools are an essential choice. MCD forming tools provide products with better appearance, more precise processing, and, most importantly, improved production efficiency.

[0003] Currently, when machining the metal surfaces of small products such as micro-components and micro-connectors for electronic products, ultra-precision small-diameter forming tools are typically used to achieve a high-gloss finish and accurate machining dimensions. However, small-diameter MCD forming tools are prone to breakage during cutting due to their small shank diameter and excessively large weld grooves. Utility Model Content

[0004] The main purpose of this utility model is to provide a forming tool that aims to solve the problem of tool breakage during the cutting process of small-diameter tools.

[0005] To achieve the above objectives, this utility model proposes a forming tool, comprising:

[0006] A tool holder includes a first end and a second end opposite to each other. The tool holder is provided with an opening groove, which is opened at the first end and extends obliquely along the axial direction of the tool holder.

[0007] The blade is welded to the opening groove, and the surface of the blade is in contact with the groove wall of the opening groove. One side of the blade is sheared to form an oblique shearing end, which avoids the oblique side wall of the opening groove.

[0008] Optionally, the oblique sidewalls of the opening groove extend in an arc shape.

[0009] Optionally, the tool holder is further provided with a clearance groove at the first end for discharging machining debris. The clearance groove is located on the side of the opening groove and communicates with the opening groove. The depth of the clearance groove is less than the depth of the opening groove.

[0010] Optionally, the clearance groove extends along the axis of the tool holder and is notched, and the angle between the side wall and the bottom wall of the clearance groove is greater than 90 degrees.

[0011] Optionally, the blade includes a first cutting edge, a second cutting edge, a third cutting edge, a fourth cutting edge, and a fifth cutting edge connected in sequence, wherein the first cutting edge and the second cutting edge extend laterally, and the third cutting edge, the fourth cutting edge, and the fifth cutting edge extend vertically.

[0012] Optionally, the angle between the first blade and the horizontal line is 15 degrees, and the angle between the second blade and the horizontal line is 0.1-0.3 degrees.

[0013] Optionally, the third cutting edge is parallel to the vertical line, the angle between the fifth cutting edge and the vertical line is 30-60 degrees, the fourth cutting edge connects the third cutting edge and the fifth cutting edge, and the fourth cutting edge has rounded corners.

[0014] Optionally, the tool holder is provided with a tool handle at the first end, and the tool handle includes a first section, a second section, a third section and a fourth section with gradually increasing diameters.

[0015] Optionally, the height from the center of the blade to the center of the handle is 3.05mm-3.10mm.

[0016] Optionally, the cutting edge is made of single-crystal diamond; the cutting rod is made of tungsten steel.

[0017] The beneficial effects of this utility model are as follows: it improves the overall strength of the cutting tool and avoids the problem of tool breakage during cutting for small-diameter tools. The first end of the tool shank has an oblique opening groove, and the cutting tool is welded into the opening groove. The oblique setting of the opening groove allows more of the shank body to be retained at the first end, thereby improving the cutting strength of the tool shank end and preventing breakage during cutting due to the small diameter of the tool shank. Furthermore, the bottom end of the cutting tool has a shear angle that avoids the groove wall of the opening groove, allowing more of the cutting tool to be welded and fitted to the tool shank while ensuring that the groove wall of the obliquely extending opening groove does not obstruct the installation and fitting of the cutting tool, thus improving the overall strength of the forming tool. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall isometric structure of the forming tool of this utility model;

[0020] Figure 2 This is a front view structural diagram of the forming tool of this utility model;

[0021] Figure 3 for Figure 2 Enlarged structural diagram of region A in the middle;

[0022] Figure 4 This is a side view of the forming tool of this utility model;

[0023] Figure 5 This is a rear view schematic diagram of the forming tool of this utility model;

[0024] Figure 6 This is a top view of the forming tool of this utility model.

[0025] Label Explanation:

[0026] 1. Tool holder; 11. First end; 12. Second end; 13. Opening groove; 14. Clearance groove; 15. Tool handle; 151. First section; 152. Second section; 153. Third section; 154. Fourth section;

[0027] 2. Blade section; 21. Shearing end; 22. First cutting edge; 23. Second cutting edge; 24. Third cutting edge; 25. Fourth cutting edge; 26. Fifth cutting edge.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] 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.

[0030] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] One embodiment of this utility model provides a forming tool, referencing... Figures 1 to 6 ,include:

[0033] The tool holder 1 includes a first end 11 and a second end 12 opposite to each other. The tool holder 1 is provided with an opening groove 13, which is opened at the first end 11 and extends obliquely along the axial direction of the tool holder 1.

[0034] The blade part 2 is welded to the opening groove 13. The surface of the blade part 2 is in contact with the groove wall of the opening groove 13. One side of the blade part 2 is sheared to form an oblique shearing end 21, which avoids the oblique side wall of the opening groove 13.

[0035] This embodiment improves the overall strength of the cutting tool and avoids the problem of tool breakage during cutting. The first end 11 of the tool shank 1 is provided with an oblique opening groove 13, and the cutting part 2 is welded into the opening groove 13. The oblique setting of the opening groove 13 allows more of the shank body to remain at the first end 11, thereby improving the cutting strength of the end of the tool shank 1 and preventing breakage during cutting due to the small diameter of the tool shank 1. Furthermore, the bottom end of the cutting part 2 is provided with a shear angle to avoid the shearing angle of the opening groove 13 wall, which allows more of the cutting part 2 to be welded and fitted to the tool shank 1 while ensuring that the wall of the obliquely extending opening groove 13 does not obstruct the installation and fitting of the cutting part 2, thus improving the overall strength of the forming tool.

[0036] Specifically, the first end 11 and the second end 12 of the tool holder 1 are used to mount the tool part 2 and connect to an external cutting drive device, respectively. An opening slot 13 extends obliquely along the axial direction of the tool holder 1. The opening slot 13 is formed at the first end 11 and extends to the side circumferential surface of the tool holder 1. The portion of the opening slot 13 extending to the side circumferential surface of the tool holder 1 is notched to facilitate the installation of the tool part 2. The opening slot 13 is formed at a partial position at the first end 11, allowing a portion of the rod to be retained on the side of the opening slot 13. This obliquely extending opening slot 13 design, compared to a completely cut-off square opening slot 13, allows the first end 11 of the tool holder 1 to retain more of the rod portion, providing greater strength during rotary cutting. Furthermore, the oblique opening slot 13, combined with the oblique shearing end 21 on the tool part 2, not only retains more of the rod but also provides more contact area for the tool part 2, allowing the tool part 2 to better fit with the tool holder 1 during welding, increasing the welding area and improving welding strength. In this embodiment, the shearing end 21 of the blade 2 is angled to avoid the angled sidewall of the opening groove 13, ensuring that the blade 2 is not obstructed by the opening groove 13 during welding, further improving the stability and service life of the tool. Furthermore, the tool holder 1 is made of tungsten steel, which has high hardness and wear resistance, enabling the tool to maintain stability during high-speed cutting even with a small diameter, reducing tool deformation or breakage caused by excessive cutting force.

[0037] Further, refer to Figure 2 The inclined sidewall of the opening groove 13 extends in an arc shape. In this embodiment, the inclined sidewall of the opening groove 13 is designed to be arc-shaped, and the radius of curvature of the arc-shaped inclined sidewall is 40mm. Compared with a straight inclined sidewall, the arc-shaped inclined sidewall can ensure that the tool holder 1 will not break along the connection between the inclined sidewall and the bottom wall, further improving the strength of the tool holder 1. The design of the arc-shaped opening groove 13 can reduce stress concentration and prevent the tool holder 1 from breaking due to stress concentration during the welding and cutting processes. Specifically, the arc-shaped sidewall can evenly distribute the stress during cutting, avoiding cracking of the welded part or the tool holder 1 due to stress concentration.

[0038] Further, refer to Figures 1 to 4The tool holder 1 also has a clearance groove 14 at its first end 11 for discharging machining debris. The clearance groove 14 is located on the same side as the opening groove 13 and communicates with it. The depth of the clearance groove 14 is less than the depth of the opening groove 13. In this embodiment, metal debris is generated during the cutting process. If not discharged, the metal debris will impact the product surface in the opposite direction, causing scratches. The clearance groove 14 is used to discharge the debris generated during processing, preventing debris accumulation from affecting the surface finish of the product. The clearance groove 14 and the opening groove 13 are located on the same side and on the side of the opening groove 13, so that the cutting direction of the tool part 2 in the opening groove 13 is consistent with the opening direction of the clearance groove 14, allowing debris to be discharged smoothly and improving cutting efficiency. The depth of the clearance groove 14 is less than the depth of the opening groove 13, ensuring the structural strength of the tool holder 1 and preventing the strength of the tool holder 1 from being weakened due to the clearance groove 14 being too deep. In this embodiment, the clearance groove 14 is formed downwards along the axis of the tool holder 1 with a length of 4.27 mm. The bottom wall of the clearance groove 14 is spaced 0.25 mm from the bottom wall of the opening groove 13, meaning the depth of the clearance groove 14 is 0.25 mm less than the depth of the opening groove 13. This design ensures the strength of the tool holder 1 while creating a larger clearance groove 14, thus improving chip removal efficiency. Specifically, the design of the clearance groove 14 not only effectively removes chips but also reduces heat accumulation during cutting, preventing tool damage due to overheating. Furthermore, the depth of the clearance groove 14 is reasonably designed, ensuring both smooth chip removal and structural strength of the tool holder 1, avoiding a decrease in the strength of the tool holder 1 due to an excessively deep clearance groove 14.

[0039] Furthermore, the clearance groove 14 extends along the axis of the tool holder 1 and is notched, with an angle greater than 90 degrees between the sidewall and bottom wall of the clearance groove 14. In this embodiment, the notched design of the clearance groove 14 facilitates easier chip removal. The bottom wall of the clearance groove 14 is parallel to the axis of the tool holder 1, and the angle between the sidewall and bottom wall of the clearance groove 14 is greater than 90 degrees. During cutting, metal chips are ejected upwards and strike the sidewall of the clearance groove. Since the sidewall of the clearance groove 14 is inclined to the axis of the tool holder 1, the metal chips are discharged from the clearance groove 14 in an oblique direction, preventing metal chips from impacting the product surface in the opposite direction and improving the smoothness of chip removal. Specifically, the clearance groove 14 is semi-open, allowing chips to be quickly discharged from the clearance groove 14 during cutting, reducing chip accumulation at the corners inside the clearance groove 14, and avoiding increased cutting force or tool damage caused by chip accumulation.

[0040] Further, refer to Figure 3The cutting tool 2 includes a first cutting edge 22, a second cutting edge 23, a third cutting edge 24, a fourth cutting edge 25, and a fifth cutting edge 26 connected in sequence. The first cutting edge 22 and the second cutting edge 23 extend laterally, while the third cutting edge 24, the fourth cutting edge 25, and the fifth cutting edge 26 extend vertically. In this embodiment, the multi-segment cutting edge design of the cutting tool 2 allows the tool to adapt to different cutting requirements. The first cutting edge 22 and the second cutting edge 23 extend laterally and are suitable for transverse cutting, while the third cutting edge 24, the fourth cutting edge 25, and the fifth cutting edge 26 extend vertically and are suitable for vertical cutting. The multi-segment cutting edge design improves the versatility and cutting efficiency of the tool. Specifically, the multiple cutting edges of the cutting tool 2 are connected to form an L-shaped structure, and each cutting edge of the cutting tool 2 extends out of the opening slot 13 so that the cutting edge is not obstructed during rotary cutting.

[0041] Furthermore, the angle between the first cutting edge 22 and the horizontal line is 15 degrees, and the angle between the second cutting edge 23 and the horizontal line is 0.1-0.3 degrees. In this embodiment, the 15-degree angle between the first cutting edge 22 and the horizontal line allows the tool to better penetrate the material during cutting, improving cutting efficiency. The 0.1-0.3-degree angle between the second cutting edge 23 and the horizontal line allows the tool to maintain high precision during cutting, making it easier to cut and form a high-gloss surface. Specifically, the end where the second cutting edge 23 connects to the third cutting edge 24 is higher than the end where the second cutting edge 23 connects to the first cutting edge 22, making the second cutting edge 23 sharper and improving its sharpness, ensuring high precision during cutting.

[0042] Furthermore, the third cutting edge 24 is parallel to the vertical line, the fifth cutting edge 26 has an angle of 30-60 degrees with the vertical line, and the fourth cutting edge 25 connects the third cutting edge 24 and the fifth cutting edge 26, with a rounded corner. In this embodiment, the third cutting edge 24 being parallel to the vertical line ensures the accuracy of vertical cutting. The angle between the fifth cutting edge 26 and the vertical line is 48.6±0.5 degrees, meaning the angle between the fifth cutting edge 26 and the third cutting edge 24 is 131.4±0.5 degrees. This angle can be adjusted as needed, allowing the tool to better adapt to the machining requirements of complex shapes such as conical structures, improving the tool's versatility. The fourth cutting edge 25 connects the third cutting edge 24 and the fifth cutting edge 26, and has a rounded corner with a radius of 0.2±0.03mm, reducing stress concentration, preventing the tool from breaking due to stress concentration during cutting, and improving the tool's service life.

[0043] Further, refer to Figure 5The tool holder 1 has a handle 15 at its first end 11. The handle 15 includes a first segment 151, a second segment 152, a third segment 153, and a fourth segment 154, all with gradually increasing diameters. The first segment 151, second segment 152, third segment 153, and fourth segment 154 are connected sequentially, and each segment has the same axis. The first segment 151 and third segment 153 are cylindrical, the second end 12 and fourth segment 154 are conical, and the fourth segment 154 is connected to the remaining part of the tool holder 1. In this embodiment, the radius of the first segment 151 is 0.9 mm, the second segment 152 is connected to the first segment 151 in an arc transition, the radii of the two ends of the second end 12 are 0.9 mm and 1.49 mm respectively, the radius of the third segment 153 is 1.49 mm, the radii of the two ends of the fourth segment 154 are 1.49 mm and 3 mm, and the radius of the remaining part of the tool holder 1 is 3 mm. A clearance groove 14 and an opening groove 13 are both formed on the handle 15. The diameter of the tool holder 15 gradually increases, which ensures that the connection between the tool shank 1 and the tool part 2 remains small in diameter to process small-sized products, while also ensuring that the other parts of the tool shank 1 have sufficient strength. In addition, the gradual increase in the diameter of the tool holder 15 can also improve the connection strength between the tool and external equipment, preventing the tool from falling off or being damaged due to unstable connection.

[0044] Furthermore, the height from the center of the cutting tool 2 to the center of the tool holder 15 is 3.05mm-3.10mm. In this embodiment, the height from the center of the cutting tool 2 to the center of the tool holder 15 is 3.06mm, allowing the second cutting edge 23 of the cutting tool 2 to extend beyond the opening groove 13 by 0.33mm. This ensures that the cutting tool 2 is welded as close as possible to the groove wall without affecting the cutting edge, improving the welding strength and ensuring the stability of the tool during cutting. When the center height of the cutting tool 2 is greater than 3.1mm, the cutting edge of the cutting tool 2 extends too far, resulting in a reduced welding area and decreased strength. When the center height of the cutting tool 2 is less than 3.05mm, the cutting edge of the cutting tool 2 extends too little, affecting the cutting process. Specifically, the height design between the cutting tool 2 and the tool holder 15 is reasonable, ensuring the stability of the tool during cutting and avoiding uneven cutting force distribution or tool vibration caused by excessive height deviation.

[0045] Furthermore, the cutting tool 2 is made of single-crystal diamond; the tool holder 1 is made of tungsten carbide. In this embodiment, the cutting tool 2 is made of single-crystal diamond, which has extremely high hardness and wear resistance, making it suitable for high-precision cutting. The tool holder 1 is made of tungsten carbide, which has high strength and toughness, can withstand large cutting forces, and prevents the tool from breaking during cutting. Specifically, the single-crystal diamond cutting tool 2 can maintain high hardness and wear resistance during high-speed cutting, making it suitable for high-precision machining. In addition, the combined design of single-crystal diamond and tungsten carbide enables the tool to maintain high stability and service life during high-speed cutting, making it suitable for high-precision and high-efficiency machining requirements.

[0046] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A forming tool, characterized in that, The utility model relates to a cutting tool, comprising: a cutter bar comprising opposite first and second ends, the cutter bar being provided with an open slot, the open slot being formed at the first end and extending along the axial direction of the cutter bar; a cutter portion welded to the open slot, the surface of the cutter portion being fitted with the slot wall of the open slot, and the cutter portion being sheared on one side to form an oblique shearing end, the shearing end avoiding the oblique side wall of the open slot.

2. The forming tool of claim 1, wherein The oblique side wall of the open slot extends in an arc shape.

3. The forming tool of claim 1, wherein, The cutter bar is further provided with a clearance slot at the first end for discharging machining debris, the clearance slot being located on the side where the open slot is and being in communication with the open slot, and the depth of the clearance slot being less than the depth of the open slot.

4. The forming tool of claim 3, wherein The clearance slot extends along the axis of the cutter bar and is in the form of a notch, and the included angle between the side wall and the bottom wall of the clearance slot is greater than 90 degrees.

5. The forming tool of claim 1 wherein, The cutter portion comprises first, second, third, fourth and fifth cutter edges connected in sequence, the first and second cutter edges extending horizontally, and the third, fourth and fifth cutter edges extending vertically.

6. The forming tool of claim 5, wherein, The included angle between the first cutter edge and the horizontal line is 15 degrees, and the included angle between the second cutter edge and the horizontal line is 0.1-0.3 degrees.

7. The forming tool of claim 5, wherein, The third cutter edge is parallel to the vertical line, the included angle between the fifth cutter edge and the vertical line is 30-60 degrees, the fourth cutter edge connects the third and fifth cutter edges, and the fourth cutter edge is a rounded corner.

8. The forming tool of claim 1 wherein, The cutter bar is provided with a cutter handle at the first end, the cutter handle comprising first, second, third and fourth sections with gradually increasing diameters.

9. The forming tool of claim 8, wherein, The height from the center of the cutter portion to the center of the cutter handle is 3.05-3.10 mm.

10. The forming tool of any one of claims 1 to 9, wherein, The cutter portion is single-crystal diamond, and the cutter bar is made of tungsten steel.

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