CN101879613B - Composite function indexable cutter - Google Patents

Abstract

The invention discloses a composite function indexable cutter, which comprises a cutter bar in a polyhedral shape, a cutter body matched with the cutter bar in shape and a pressing plate. The tool bar of the tool consists of three groups of three equal cutting planes, three chip curling cambered surfaces and two auxiliary back surfaces, and the front angle, the main back angle, the auxiliary back angle, the edge inclination angle, the main deflection angle and the auxiliary deflection angle which are associated with the three main cutting edges and the three auxiliary cutting edges can still keep the angle unchanged after the tool bar is indexed. The edges and the tool points of the tool section are provided with edges and transitional smoothing edges so as to improve the strength of the tool section and the quality of the processed surface. The knife strip has the characteristics of small volume, wonderful angle, high strength, indexable performance, regrinding performance, adjustability, convenient and firm clamping, and can play the roles of saving materials, time, labor, energy and efficiency in the turning process.

Description

A Composite Function Indexable Tool

technical field

The invention relates to the field of metal cold processing, in particular to the use of an indexable cutter with compound functions.

Background technique

At present, in the field of turning of metal cold working, there are four types of cutting tools commonly used, namely: integral high-speed steel bar turning tools, welding turning tools, machine clip turning tools, and indexable turning tools. Various types of turning tools have different application ranges and functions. As far as their shortcomings are concerned, high-speed steel cannot withstand high-speed cutting; welded turning tools are prone to brittle cracks when they are heated and deteriorated after welding, and the number of sharpening times is high. The efficiency is low, the auxiliary processing time is increased, and the production efficiency is low; the clip-type turning tool cannot be indexed, and the blade material is not fully utilized; the blade of the indexable turning tool cannot be reground, and the cost of the blade is high.

Contents of the invention

Aiming at the shortcomings of the existing cutting tools above, the present invention designs a composite indexable blade cutting tool with indexable function, regrinding function, adjustable function, high-speed and powerful cutting, which integrates the advantages of many cutting tools.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

An indexable cutting tool with compound functions, comprising a six-sided knife bar (21), a knife bar (1) with a mounting groove conforming to the shape of the knife bar, and a pressing plate (4) conforming to the shape of the knife bar , the knife bar (21) is made up of three knife bar main back surfaces (17) and three knife bar chip flutes (16), and the three knife bar main back surfaces (17) and three knife bar chip flutes (16) of the said knife bar (21) A knife bar chip volume flute (16) is perpendicular to its knife bar vice back (9), and it is characterized in that: the three knife bar main back surfaces (17) are in phase with the chip volume arc surfaces of the three knife bar chip volume flutes (16) There is a main cutting edge (18) between the adjacent blades, and a secondary cutting edge (8) is arranged between the auxiliary rear face of the blade (9) and the chip rolling arc surfaces of the three blade chip flutes (16). A rake angle γ is formed between the main cutting edge (18) and the chip volume flute (16) of the knife bar, and a main relief angle α2 is formed between the main cutting edge (18) of the knife bar and the main rear surface (17) of the knife bar in the cutting plane, And it is consistent with the main relief angle α2 of the main rear surface (19) of the cutter bar. The secondary cutting edge (8) of the knife bar and the secondary rear surface (9) of the knife bar form a secondary relief angle α1 in the secondary cutting plane, and it is aligned with the secondary rear surface of the tool bar. (11) has the same secondary clearance angle α1, the blade (21) coincides with the joint surface (10) of the blade (10), and forms a negative edge inclination angle λ with the horizontal axis of the blade (1). The cutting edge (18) has a main cutting edge horizontal edge (25) and a main cutting edge chamfer (26), and the three knife points (20) of the knife bar (21) have a knife point transition edge (23) and a knife point A wiper blade (24); the knife bar (1) has a knife bar joint surface (10) that matches the shape of the knife bar and a press plate seat plane (5) of the pressing plate (4); the knife bar ( 1) There is a tool groove and tip protection groove (22) at the bottom of the joint surface (10) of the tool bar and tool bar that matches the shape of the tool bar; the tool bar design application type is an outer circle turning tool , end face turning tool, inner hole turning tool, milling cutter; the design shape of the knife strip is a deformed triangle or deformed quadrilateral type; the material of the knife strip is hard alloy or high-speed steel.

Compared with the prior art, the compound function indexable cutter of the present invention has the advantages of:

The knife bar of a compound function indexable tool of the present invention has small volume, excellent angle, high strength, can be indexed, regrinded, adjustable, convenient and firm in clamping, saves auxiliary time, reduces labor intensity, and saves The advantages of reducing production costs and improving production efficiency. The invention solves the shortcomings of frequent sharpening of traditional welding turning tools, time-consuming and labor-intensive sharpening, increased auxiliary time, too fast tool cost consumption, and low production efficiency; it solves the shortcomings of machine clamp tool blades that cannot be indexed; The shortcomings of indexing tools that cannot be reground and low blade usage.

Description of drawings

The "tools" described in the following figures 1-26 all refer to "a composite function indexable tool" of the present invention.

Fig. 1 is a cutter top view;

Fig. 2 is a view from the direction B of the tool;

Fig. 3 is a C-direction view of the tool;

Fig. 4 is a sectional view of cutter A-A;

Figure 5 is an enlarged view of the position of the tool П;

Figure 6 is an enlarged view of the position of the cutter;

Figure 7 is an enlarged view of the position of the tool І;

Fig. 8 is a three-dimensional view of the tool;

Fig. 9 is a schematic diagram of the installation of auxiliary pads for use of tools;

Fig. 10 is a schematic diagram showing that the cutter head extends out when the cutter is regrinded;

Fig. 11 is a schematic diagram of tool outer circle turning;

Fig. 12 is a schematic diagram of tool face turning;

Fig. 13 is a schematic diagram of inner hole turning;

Fig. 14 is a schematic diagram of the application of cutter bar milling;

Fig. 15-Fig. 26 are the schematic diagrams of the design and installation of the tool changing shape.

Each label in the figure means:

1. Cutter rod 2. Convex surface of cutter rod 3. Fastening screw

4. Press plate 5. Plane of press plate seat 6. Joint surface of press plate cutter head

7. Pressure plate fastening process groove 8. Secondary cutting edge of blade 9. Back of vice

10. Jointing surface of cutter bar and blade 11. Back of cutter bar pair 12. Side of pressure plate groove

13. The back of the pressure plate groove 14. The chamfered surface of the pressure plate 15. The chip volume groove of the pressure plate

16. Chip flute of knife bar 17. Main back of knife bar 18. Main cutting edge of knife bar

19. The main back of the knife rod 20. The tip of the knife 21. The blade

22. Tool groove tip protection groove 23. Tool tip transition edge 24. Tool tip wiper edge

25. Horizontal corner of the main cutting edge 26. Chamfering of the main cutting edge 27. Fastening screw screw hole

28. Pressure plate screw through hole 29. Auxiliary fastening knife strip 30. Extending part of knife strip regrinding

Detailed ways:

In order to make the purpose and technical solution of the present invention clearer, the present invention will be further described below in conjunction with the specific embodiments of the accompanying drawings.

Referring to Fig. 1-Fig. 10, a composite function indexable cutter of the present invention consists of a special curved triangular blade 21, a blade rod 1 conforming to the shape of the blade, a pressure plate 4 conforming to the shape of the blade, and fastening The screw rod 3 is composed. The knife bar 21 is positioned between the knife bar 1 and the pressing plate 4, and is connected on the fastening screw screw hole 27 on the knife bar 1 by the screw rod through hole 28 on the pressing plate by the fastening screw 3, and the knife bar 21 and the pressing plate 4 Fastened on the tool holder 1. The position of the pressure plate is on the boss 2 at the front end of the cutter bar. There is a plane 5 of the pressure plate seat. There are side surfaces 12 of the pressure plate groove and back 13 of the pressure plate groove on both sides of the plane of the pressure plate seat for the force positioning of the pressure plate. The chamfering surface 14 of the angle pressing plate is only used for saving materials and being attractive in appearance.

The integral knife blade 21 positioning contour curve surface is distributed in an equilateral triangle position, each surface has a blade cutting main relief angle α2 and a blade chip volume groove 16, and three R2 arcs are equally distributed at 120° on the blade triangular section , when a certain arc undertakes the task of chip cutting, the other two arcs undertake the task of positioning on the joint surface 10 of the cutter bar. The entire knife bar is pressed and positioned by the three knife bar joint surfaces 10 of the lower knife bar groove and the pressure plate cutter head joint surface 6 of the upper pressure plate 4. The chips of the workpiece flow along the main cutting edge 18 of the knife bar to the chip rolling groove 16 of the knife bar and the chip rolling groove 15 of the pressing plate successively along the arc tangent. In order to protect the main cutting edge 18 and the tip 20 of the knife bar on the knife bar 21, a tool tip protection groove 22 and a pressure plate fastening process groove are respectively opened in the knife bar knife bar positioning groove and the pressure plate knife bar limit groove. 7. To prevent the blade from being crushed and to facilitate fastening of the blade. When the knife bar 21 is installed in the tool holder with a negative edge inclination angle λ and is compressed, a secondary relief angle α1 is formed between the secondary rear surface 9 of the knife bar and the secondary cutting plane, and is aligned with the knife bar 1. The angles of the secondary back faces 11 of the bar are consistent, and the main cutting edge 18 and the secondary cutting edge 8 of the knife bar 21 have a main deflection angle and a secondary deflection angle on the base surface. The main rear face 17 of the blade 21 is at the same angle as the main rear face 19 of the tool holder 1 . In order to enhance the strength of the tip 20, the main cutting edge of the blade 21 is provided with a horizontal edge 25 and a chamfer 26, and the arc part of the tip 21 is provided with a transition edge 23 and a wiper edge 24 to improve the surface of the workpiece. Quality, its length L 1 and L 2 can be designed according to the material and process to be processed, and L 3 and L4 can also be designed as a circular arc transition.

During cutting, when the first tool tip is worn out, you only need to loosen the fastening screw 3, lift the pressure plate 4, rotate the knife bar 21 one side, and then tighten the knife bar to use the second tool tip to perform the second tool tip. For secondary processing, when the second tool tip is worn, loosen it according to the above method, and then use the third tool tip for third processing after tightening. When the third tool tip is also worn, it can be processed as shown in Figure 10. Extend the knife strip forward, and then sharpen it tightly. When sharpening, keep the plane behind the side of the knife strip perpendicular to the plane behind the main one. After sharpening, reinstall and fix the sharpened knife strip to be ready again Carry out indexable cycle processing.

The knife bar of the present invention can be indexed three times after each sharpening, and the sharpening amount is only 0.1-0.3mm under normal conditions, and will not exceed 0.5mm at most. Calculated on the basis of the cutting edge length of a normal indexable blade of 20mm, in Under the auxiliary clamping of the auxiliary fastening knife strip 29 as shown in Figure 9, the service life of the knife strip can be extended to about 5mm. From 20mm to 5mm, it can be regrinded 30 times with a maximum grinding amount of 0.5mm. After grinding, it can be indexed and used three times, and the actual number of uses is up to 90 times, which is 30 times that of ordinary indexable blades based on the number of times of indexing; it can be used 60 times more than traditional machine-clamped tools based on the same grinding amount and material. The utilization rate is 3 times that of the machine clamp tool; it can be used 120 times more than the traditional welding blade based on the same grinding amount and material, and the utilization rate of the blade is 4 times that of the welding turning tool.

Referring to Fig. 11-Fig. 14, a composite function indexable cutting tool of the present invention can be widely used in outer circle turning, face turning and inner hole turning in the field of turning processing, and the knife strip and its installation method of the present invention can also be used in in the field of milling.

Referring to Figures 15-26, the above case of implementing the outer turning tool is only a preferred embodiment of the present invention, and the blade design application types of the tool can be outer turning tools, face turning tools, inner hole turning tools and milling cutters. It should be pointed out that for those of ordinary skill in the art, on the premise of not departing from the principle of the present invention, several equivalent transformations can be made to the design shape of the blade within the polygonal range, and these equivalent transformations should be regarded as protection of the present invention scope.

The blade material is also selected as cemented carbide material according to the preferred scheme in the field of turning processing. Similarly, high-speed steel material or other materials can also be selected according to the needs of processing materials and processes.

The compound function indexable cutting tool of the present invention can be widely used in the field of mechanical manufacturing metal cold processing, and can reduce production cost and improve production efficiency under the condition of material saving, time saving and labor saving.

Claims (5)

1. a complex function indexable tool, comprise the tool section (21) in six shapes and there is the knife bar (1) of the mounting groove matched with tool section shape and there is the pressing plate (4) matched with tool section shape, described tool section (21) is made up of three tool section major flanks (17) and three tool section chip curling grooves (16), three tool section major flanks (17) and three tool section chip curling grooves (16) of described tool section (21) are perpendicular with its tool section minor flank (9), it is characterized in that: three tool section major flanks (17) and the volume of three tool section chip curling grooves (16) consider to be worth doing cambered surface mutually adjoining between have tool section main cutting edge (18), tool section minor flank (9) and the volume of three tool section chip curling grooves (16) consider to be worth doing cambered surface mutually adjoining between have front cutting edge (8), an anterior angle γ is formed between main cutting edge (18) and tool section chip curling groove (16), tool section main cutting edge (18) and its tool section major flank (17) form a primary clearance α in cutting plane ₂, and with the primary clearance α of knife bar major flank (19) ₂unanimously, tool section front cutting edge (8) and its tool section minor flank (9) form a front clearance α in tool minor cutting edge plane ₁, and with the front clearance α of knife bar minor flank (11) ₁angle consistent, tool section (21) and knife bar tool section composition surface (10) match, and form a negative side rake λ with the horizontal axis of knife bar (1), tool section main cutting edge (18) there are the horizontal corner angle of main cutting edge (25) and main cutting edge chamfered edge (26), three points of a knife (20) of tool section (21) have point of a knife transitional edges (23) and point of a knife wiper edges (24), described knife bar (1) there is the pressing plate seat plane (5) of knife bar tool section composition surface (10) and the pressing plate (4) matched with tool section shape.

2. a kind of complex function indexable tool according to claim 1, is characterized in that: the bottom position on the knife bar tool section composition surface (10) matched with tool section shape on described knife bar (1) has cutter groove point of a knife to protect groove (22).

3. a kind of complex function indexable tool according to claim 1, is characterized in that: the tool section design ap-plication type of described cutter is billmpse tool, facing tool, internal lathe-tool, milling cutter.

4. a kind of complex function indexable tool according to claim 1, is characterized in that: the design shape of described tool section is the triangle of distortion or the quadrangle type of distortion.

5. a kind of complex function indexable tool according to claim 1, is characterized in that: the material of described tool section is carbide alloy or high-speed steel.