High-efficiency rough milling cutter

Abstract

The utility model discloses a high-efficiency rough milling cutter, which relates to the technical field of rough milling cutters, and comprises a handle part, the front end of the handle part is provided with a cutter head, the cutter head is provided with a blade part, the blade part is provided with a plurality of unequally distributed lead angles, the front end of the blade part is provided with a plurality of unequally distributed chip grooves, and the front end of the blade part is also provided with a plurality of polishing chip grooves. A plurality of arc-shaped teeth are arranged on the lead angles; a cutter shoulder straight blade is arranged in the middle of the front end of the blade part; the outer side of the handle part is movably sleeved with a connecting sleeve, and the outer side of the handle part is fixedly connected with two guide strips which are symmetrically arranged; according to the utility model, the arc tooth type of the variable tooth pitch-chip breaker groove is shown in the figure 1, namely the tooth width Agt; the cutting edge strength is greatly improved in the high-speed machining process, tipping is prevented, meanwhile, the machining efficiency is improved while scrap iron is broken in the high-speed machining process, secondly, as shown in the figure 3, theta1 is not equal to theta2, the lead angle theta of each cutting edge is changed, cutter vibration can be restrained, and an excellent machining face can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of rough milling cutters, in particular to a high-efficiency rough milling cutter. Background Art

[0002] A roughing cutter is a cutting tool used in metal processing, usually used for rough machining and removing excess material on the workpiece surface. It has a large tool diameter and a high cutting speed, which can quickly remove material from the metal surface, but the machined surface roughness is high. Roughing cutters are usually used in the roughing and initial machining stages for subsequent finishing and trimming.

[0003] In the field of mechanical processing, customers have increasingly higher requirements for processing efficiency, especially for rough processing with high removal rates, and medium to high hardness is a difficult point.

[0004] Ordinary high-speed steel milling cutters on the market are not wear-resistant enough and have a general lifespan due to their soft body material. They are difficult to process materials with medium to high hardness, or even cannot process them.

[0005] Ordinary carbide milling cutters are prone to chipping and even the risk of breaking when processing medium to high hardness materials. For this reason, we have designed a high-efficiency rough milling cutter to solve the above problems. Summary of the invention

[0006] The utility model aims to solve the shortcomings in the prior art and provides a high-efficiency rough milling cutter.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A high-efficiency rough milling cutter comprises a shank, a cutter head is arranged at the front end of the shank, a blade is arranged at the cutter head, a plurality of unequally distributed lead angles are arranged at the blade, a plurality of unequally distributed chip grooves are arranged at the front end of the blade, a plurality of polished chip grooves are also arranged at the front end of the blade, a plurality of arc-shaped teeth are arranged at the lead angles, and a shoulder straight edge is arranged at the middle of the front end of the blade;

[0009] A connecting sleeve is provided on the outer movable sleeve of the handle, and two symmetrically arranged guide strips are fixedly connected to the outer side of the handle. The guide strips are movably inserted in the insertion channels arranged on the inner wall of the connecting sleeve. A clamping length adjustment structure is connected between the handle and the connecting sleeve, and the clamping length adjustment structure is used to adjust the length of the milling cutter.

[0010] Preferably, the tooth width A provided on the circular arc tooth profile is larger than the groove width B provided on the circular arc tooth profile.

[0011] Preferably, the clamping length adjustment structure includes a connecting rod fixed to the inner wall of the connecting sleeve, the vertical cross-section of the connecting rod is a square structure, the handle is movably sleeved on the outside of the connecting rod through the sleeve cavity, and two symmetrically arranged L-shaped blocks are slidably connected in the cavity inside the connecting rod.

[0012] Preferably, a slider is fixedly connected to one side wall of the two L-shaped blocks facing the blade, and the two sliders are slidably connected to a slide groove provided on the inner wall of the cavity, and the two sliders are connected by a spring a.

[0013] Preferably, the two ends of the two L-shaped blocks are respectively provided with a slope a and a slope b, the slope a is movably extended to the outside of the connecting rod and is clamped in the groove provided on the inner wall of the sleeve cavity, and multiple equidistant grooves are provided on the inner walls of the sleeve cavity. The two slopes b are movably overlapped on the slopes c provided at both ends of the same U-shaped pressure rod, and the U-shaped pressure rod slides in the cavity.

[0014] Preferably, a pressing rod is fixedly connected to one end of the U-shaped pressure rod away from the L-shaped block, and the end of the pressing rod away from the U-shaped pressure rod is movably extended to the outside of the connecting sleeve. The outer movable sleeve of the pressing rod is provided with a spring b, and the two ends of the spring b are respectively connected to the outer side of the U-shaped pressure rod and the inner wall of the connecting sleeve.

[0015] Compared with the prior art, the beneficial effects of the present invention are: Figure 1 The arc-shaped tooth profile with variable pitch and chip breaker groove design shown in the figure, that is, tooth width A> groove width B, greatly improves the blade strength and prevents chipping in high-speed machining. At the same time, it breaks the iron chips and improves the machining efficiency in high-speed machining. Figure 3 As shown in the figure, the unequal lead design of Θ1≠Θ2, the lead angle Θ of each cutting edge changes, which can suppress the tool chattering and achieve an excellent machined surface. Furthermore, the unequal design: α≠β unequal blade design is specially designed for steel parts; the large unequal design suppresses tool vibration; while performing high-efficiency cutting, it improves the finish of the machined surface;

[0016] By setting up a clamping length adjustment structure, when the length of the rough milling cutter needs to be adjusted, the pressing rod can be pressed by hand to stretch the spring b, and the inclined surfaces c at both ends of the U-shaped pressing rod press against the inclined surface b of the L-shaped clamping block, so that the two L-shaped clamping blocks move relative to each other, and the two sliders compress the spring a, and at the same time, the inclined surfaces a of the L-shaped clamping blocks are separated from the clamping groove, so that the handle can be extended outward from the connecting sleeve to adjust the length, so that it is easy to adjust to different lengths for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the plane development structure of the shoulder straight edge of a high-efficiency rough milling cutter proposed by the utility model;

[0018] Figure 2 A schematic diagram of the polishing chip groove and chip groove structure of a high-efficiency rough milling cutter proposed by the utility model;

[0019] Figure 3 The utility model discloses a schematic diagram of the unfolded structure of various components in a clamping length adjustment structure of a high-efficiency rough milling cutter.

[0020] In the figure: 1. Straight blade shoulder; 2. Arc tooth profile; 3. Polished chip groove; 4. Chip groove; 5. Lead angle; 6. Blade; 7. Shank; 71. Connecting sleeve; 72. Guide strip; 8. Clamping length adjustment structure; 81. Connecting rod; 82. L-shaped clamping block; 83. Sliding block; 84. Spring a; 85. U-shaped pressure rod; 86. Pressing rod; 87. Spring b. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects of the utility model easy to understand, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Example

[0022] In the field of mechanical processing, customers have increasingly higher requirements for processing efficiency, especially for rough processing with high removal rates, and medium to high hardness is a difficult point.

[0023] Ordinary high-speed steel milling cutters on the market are not wear-resistant enough and have a general lifespan due to their soft body material. They are difficult to process materials with medium to high hardness, or even cannot process them.

[0024] Ordinary carbide milling cutters are prone to chipping and even the risk of breaking when processing medium to high hardness materials.

[0025] For this purpose, refer to Figure 1-3 A high-efficiency rough milling cutter comprises a shank 7, a cutter head is arranged at the front end of the shank 7, a cutting edge 6 is arranged on the cutting edge 6, a plurality of unequally distributed lead angles 5 are arranged at the front end of the cutting edge 6, a plurality of unequally distributed chip grooves 4 are arranged at the front end of the cutting edge 6, a plurality of polished chip grooves 3 are also arranged at the front end of the cutting edge 6, a plurality of arc-shaped tooth profiles 2 are arranged on the lead angles 5, and a shoulder straight edge 1 is arranged at the middle of the front end of the cutting edge 6;

[0026] The outer movable sleeve of the handle 7 is provided with a connecting sleeve 71, and the outer side of the handle 7 is fixedly connected with two symmetrically arranged guide strips 72. The guide strips 72 are movably inserted into the insertion channel provided on the inner wall of the connecting sleeve 71. A clamping length adjustment structure 8 is connected between the handle 7 and the connecting sleeve 71, and the clamping length adjustment structure 8 is used to adjust the length of the milling cutter.

[0027] Among them, the core thickness taper is: Φd1>Φd2, and the variable core thickness design improves the rigidity and stability of the tool, and the tool is not easy to break during processing.

[0028] In this embodiment, the tooth width A provided on the arc-shaped tooth profile 2 is larger than the groove width B provided on the arc-shaped tooth profile 2 .

[0029] Among them, the tooth width A>slot width B, which greatly improves the blade strength and prevents chipping during high-speed machining. At the same time, it breaks the iron chips during high-speed machining and improves the machining efficiency.

[0030] In this embodiment, the clamping length adjustment structure 8 includes a connecting rod 81 fixed to the inner wall of the connecting sleeve 71. The vertical section of the connecting rod 81 is a square structure. The handle 7 is movably sleeved on the outer side of the connecting rod 81 through the sleeve cavity. Two symmetrically arranged L-shaped blocks 82 are slidably connected in the cavity provided inside the connecting rod 81. Slide blocks 83 are fixed on the side walls of the two L-shaped blocks 82 facing the blade 6. The two slide blocks 83 are slidably connected to the slide grooves provided on the inner wall of the cavity. The two slide blocks 83 are connected by a spring a84. The two ends of the two L-shaped blocks 82 are respectively provided with inclined surfaces a and inclined surfaces b, and the inclined surfaces a are movably extended to The outer side of the connecting rod 81 is clamped in the clamping groove provided on the inner wall of the sleeve cavity. A plurality of equidistantly arranged clamping grooves are provided on the inner walls on both sides of the sleeve cavity. The two inclined surfaces b are movably overlapped on the inclined surfaces c provided at both ends of the same U-shaped pressure rod 85. The U-shaped pressure rod 85 slides in the cavity. The end of the U-shaped pressure rod 85 away from the L-shaped block 82 is fixedly connected with a pressing rod 86. The end of the pressing rod 86 away from the U-shaped pressure rod 85 is movably extended to the outside of the connecting sleeve 71. The outer movable sleeve of the pressing rod 86 is provided with a spring b87. The two ends of the spring b87 are respectively connected to the outer side of the U-shaped pressure rod 85 and the inner wall of the connecting sleeve 71.

[0031] Among them, by pressing the pressing rod 86 by hand, the spring b87 is stretched, and the inclined surfaces c at both ends of the U-shaped pressing rod 85 press against the inclined surface b of the L-shaped block 82, so that the two L-shaped blocks 82 move relative to each other, and the two sliders 83 compress the spring a84, and at the same time, the inclined surfaces a of the L-shaped block 82 are separated from the slot, so that the handle 7 can be extended outward from the connecting sleeve 71 to adjust the length.

[0032] Embodiment: When using the high-efficiency rough milling cutter, as shown in the attached Figure 1 The arc tooth type 2 with variable pitch and chip breaker groove design shown in the figure, that is, tooth width A> groove width B, greatly improves the blade strength and prevents chipping in high-speed machining. At the same time, it breaks the iron chips and improves the machining efficiency in high-speed machining. Figure 3As shown in the figure, the unequal lead design of Θ1≠Θ2, the lead angle of each cutting edge changes by 5Θ, which can suppress the tool chattering and achieve an excellent machined surface. Furthermore, the unequal design: α≠β unequal blade design is specially designed for steel parts; the large unequal design suppresses tool vibration; while performing high-efficiency cutting, it improves the finish of the machined surface;

[0033] When the length of the rough milling cutter needs to be adjusted, the pressing rod 86 can be pressed by hand to stretch the spring b87, and the inclined surfaces c at both ends of the U-shaped pressing rod 85 can press against the inclined surface b of the L-shaped block 82, so that the two L-shaped blocks 82 move relative to each other, and the two sliders 83 compress the spring a84, and at the same time, the inclined surfaces a of the L-shaped block 82 can be separated from the slot, so that the handle 7 can be extended outward from the connecting sleeve 71 to adjust the length, so that it can be adjusted to different lengths for use.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of protection claimed by the utility model. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-efficiency rough milling cutter, comprising a shank (7), characterized in that: The front end of the handle (7) is provided with a cutter head, the cutter head is provided with a blade (6), the blade (6) is provided with a plurality of unequally distributed lead angles (5), the front end of the blade (6) is provided with a plurality of unequally distributed chip removal grooves (4), the front end of the blade (6) is also provided with a plurality of polishing chip removal grooves (3), the lead angles (5) are each provided with a plurality of arc-shaped tooth profiles (2), and a shoulder straight edge (1) is provided at the middle of the front end of the blade (6); The outer movable sleeve of the handle (7) is provided with a connecting sleeve (71), and two symmetrically arranged guide bars (72) are fixedly connected to the outer side of the handle (7), and the guide bars (72) are movably inserted into the insertion channel provided on the inner wall of the connecting sleeve (71). A clamping length adjustment structure (8) is connected between the handle (7) and the connecting sleeve (71), and the clamping length adjustment structure (8) is used to adjust the length of the milling cutter.

2. A high-efficiency rough milling cutter according to claim 1, characterized in that: The tooth width A provided on the circular arc tooth profile (2) is larger than the groove width B provided on the circular arc tooth profile (2).

3. A high-efficiency rough milling cutter according to claim 1, characterized in that: The clamping length adjustment structure (8) comprises a connecting rod (81) fixedly connected to the inner wall of the connecting sleeve (71); the vertical cross section of the connecting rod (81) is a square structure; the handle (7) is movably sleeved on the outer side of the connecting rod (81) through a sleeve cavity; and two symmetrically arranged L-shaped clamping blocks (82) are slidably connected in a cavity provided inside the connecting rod (81).

4. A high-efficiency rough milling cutter according to claim 3, characterized in that: A sliding block (83) is fixedly connected to one side wall of the two L-shaped blocks (82) facing the blade (6). The two sliding blocks (83) are slidably connected to a sliding groove provided on the inner wall of the cavity. The two sliding blocks (83) are connected via a spring a (84).

5. A high-efficiency rough milling cutter according to claim 4, characterized in that: The two ends of the two L-shaped blocks (82) are respectively provided with an inclined surface a and an inclined surface b, the inclined surface a movably extends to the outside of the connecting rod (81) and is engaged in a groove provided on the inner wall of the sleeve cavity, and a plurality of equally spaced grooves are provided on the inner walls of both sides of the sleeve cavity, and the two inclined surfaces b are respectively movably overlapped on the inclined surfaces c provided at both ends of the same U-shaped pressing rod (85), and the U-shaped pressing rod (85) slides in the cavity.

6. A high-efficiency rough milling cutter according to claim 5, characterized in that: The end of the U-shaped pressing rod (85) away from the L-shaped clamping block (82) is fixedly connected with a pressing rod (86), and the end of the pressing rod (86) away from the U-shaped pressing rod (85) is movably extended to the outside of the connecting sleeve (71), and the outer movable sleeve of the pressing rod (86) is provided with a spring b (87), and the two ends of the spring b (87) are respectively connected to the outer side of the U-shaped pressing rod (85) and the inner wall of the connecting sleeve (71).

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