Cutting tool with positioning surface

Abstract

The utility model provides a cutting tool with a positioning surface, which comprises a cutting blade, a blade upper surface, a blade lower surface and a blade side surface connected with the blade upper surface and the blade lower surface, the side surface of the blade is provided with a longitudinal positioning surface and a transverse positioning surface; the longitudinal positioning surface and / or the transverse positioning surface respectively form an included angle beta with / with the lower surface of the blade; one end of the cutter bar is sunken to form a blade groove for accommodating the cutting blade, the blade groove is provided with a groove bottom surface, a longitudinal positioning groove wall and a transverse positioning groove wall, and an included angle beta is formed between the longitudinal positioning groove wall and / or the transverse positioning groove wall and / or the groove bottom surface respectively; wherein beta is larger than or equal to 83 degrees and smaller than or equal to 87 degrees, and the lower surface of the blade, the longitudinal positioning face and the transverse positioning face are attached to the groove bottom face, the longitudinal positioning groove wall and the transverse positioning groove wall respectively. The utility model aims to provide a cutting tool which is smooth in positioning surface, high in combined clamping precision, simple in structure and convenient to install.

Description

Technical Field

[0001] The utility model relates to the field of cutting tools, in particular to a cutting tool with a positioning surface. Background Art

[0002] If you want to get good workpiece processing quality, the combination of the cutting tool positioning surface is extremely important. As we all know, carbide tools have excellent cutting performance and are therefore widely used. The production of carbide blades is inseparable from the grinding process, and the grinding process is sometimes used to obtain a special shape of the support surface and positioning surface on a certain blade. However, for the support surface and positioning surface of blades with complex shapes and small sizes, the process accuracy is very limited and often cannot meet the processing of workpieces with higher performance requirements. Therefore, it must be completed in conjunction with the positioning surface and installation method of the tool bar.

[0003] For example, publication number CN102271848B discloses a clamping method for a cutting tool with an adjustment mechanism, which mainly involves fitting a blade and a shank positioning surface and completing the installation by screw locking. It is particularly noteworthy that the shank portion is positioned by a plug-in locking positioning method, which has a complex appearance and structure and a high manufacturing cost. Utility Model Content

[0004] Based on this, the utility model aims to overcome the defects of the prior art and provide a cutting tool with a positioning surface.

[0005] A cutting tool having a positioning surface, comprising:

[0006] A cutting blade, comprising an upper surface of the blade, a lower surface of the blade, and a blade side surface connecting the upper surface of the blade and the lower surface of the blade; the blade side surface has a longitudinal positioning surface and a transverse positioning surface, and the longitudinal positioning surface and / or the transverse positioning surface respectively form an angle β with / with the lower surface of the blade;

[0007] A tool bar, one end of which is recessed to form a blade groove for accommodating the cutting blade, the blade groove having a groove bottom surface, a longitudinal positioning groove wall and a transverse positioning groove wall, the longitudinal positioning groove wall and / or the transverse positioning groove wall respectively forming an angle β with / with the groove bottom surface;

[0008] in,

[0009] 83°≦β≦87°, the lower surface of the blade, the longitudinal positioning surface and the transverse positioning surface are respectively in contact with the groove bottom surface, the longitudinal positioning groove wall and the transverse positioning groove wall.

[0010] Further, the blade side includes a pair of oppositely arranged longitudinal side surfaces and a pair of oppositely arranged transverse side surfaces; the longitudinal side surfaces include the longitudinal positioning surface connected to the blade upper surface, and the longitudinal lower side surface connected to the blade lower surface; the transverse side surfaces include the transverse positioning surface connected to the blade upper surface, and the transverse lower side surface connected to the blade lower surface; the angles formed by the longitudinal lower side surface and the transverse lower side surface with the blade lower surface are respectively greater than or equal to angle β.

[0011] Furthermore, the side walls of the blade slot include longitudinal side walls and transverse side walls; the longitudinal side walls include the longitudinal positioning slot walls connected to the slot bottom surface, and the longitudinal upper side walls extending to the top of the blade slot; the transverse side walls include the transverse positioning slot walls connected to the slot bottom surface, and the transverse upper side walls extending to the top of the blade slot; the angles formed by the longitudinal upper side walls and the transverse upper side walls with the slot bottom surface are respectively greater than or equal to angle β.

[0012] Furthermore, in the normal direction of the groove bottom surface, the length of the fitting surface between the longitudinal positioning surface and the longitudinal positioning groove wall is b1, the length of the longitudinal upper side wall is a1, and the length of the longitudinal lower side surface is c1, b1>a1≥c1.

[0013] Furthermore, in the normal direction of the groove bottom surface, the length of the fitting surface between the transverse positioning surface and the transverse positioning groove wall is b2, the length of the transverse upper side wall is a2, the length of the transverse lower side surface is c2, and b2>a2≥c2.

[0014] Furthermore, the lower surface of the blade, the longitudinal positioning surface, the transverse positioning surface, the groove bottom surface, the longitudinal positioning groove wall, the transverse positioning groove wall, the longitudinal lower side surface, the transverse lower side surface, the longitudinal upper side wall and the transverse upper side wall are all flat surfaces.

[0015] Furthermore, it also includes a fastener, and the cutting blade and the blade slot both have a center hole for accommodating the fastener; the center axis of the fastener, the center axis of the cutting blade center hole, and the center axis of the blade slot center hole coincide with each other.

[0016] Further, the cutting insert is rotationally symmetric by 180° about the central axis of the central hole.

[0017] The advantages of this application compared to the prior art are:

[0018] 1. The utility model provides a cutting tool with a positioning surface. The cutting blade and the blade groove at the end of the tool rod are clamped together during installation. The transverse positioning surface and the longitudinal positioning surface respectively form a Z-shaped interlocking fit with the transverse positioning groove wall and the longitudinal positioning groove wall, and the positioning method of the Z-shaped fitting surface is line-surface contact, which can effectively prevent the cutting blade from deviating during cutting operation.

[0019] 2. The positioning and locking method adopted by the utility model has a simple appearance and structure, is easy to install, has high locking accuracy and low processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a three-dimensional structure decomposition of a cutting tool with a positioning surface according to an embodiment of the present application;

[0021] Figure 2 It is a three-dimensional exploded schematic diagram of another angle of a cutting tool with a positioning surface according to an embodiment of the present application;

[0022] Figure 3 It is a side view structural schematic diagram of a cutting tool with a positioning surface according to an embodiment of the present application;

[0023] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0024] Figure 5 is a schematic diagram of the top view of the cutting blade in an embodiment of the present application;

[0025] in:

[0026] 1. Cutting blade; 2. Fastener; 3. Tool bar; 31. Blade slot; 101. Blade upper surface; 102. Blade lower surface; 103. Transverse positioning surface; 104. Longitudinal positioning surface; 105. Blade center hole; 106. Longitudinal lower side surface; 107a, 107b: Longitudinal side surface; 108a, 108b: Transverse side surface; 301. Groove bottom surface; 302. Longitudinal positioning groove wall; 303. Transverse positioning groove wall; 304. Blade slot center hole; 305. Longitudinal upper side wall; n1. Center axis of blade center hole; n2. Center axis of fastener; n3. Center axis of blade slot center hole; x, first intersection line; y, third intersection line. DETAILED DESCRIPTION

[0027] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0028] The utility model provides a cutting tool with a positioning surface, aiming to solve the problem that the positioning surfaces of the blade and the tool bar are uneven and the combined clamping precision is not high during cutting, which leads to the blade breaking, chatter marks on the processed workpiece and other unqualified problems.

[0029] Please refer to Figure 1-5 The embodiment of the present application provides a cutting tool with a positioning surface, including a cutting blade 1 and a tool rod 3.

[0030] The cutting blade 1 comprises a blade upper surface 101, a blade lower surface 102 and a blade side surface connecting the blade upper surface 101 and the blade lower surface 102; the blade side surface has a longitudinal positioning surface 104 and a transverse positioning surface 103, and the longitudinal positioning surface 104 or the transverse positioning surface 103 forms an angle β with the blade lower surface 102; a blade center hole 105 for installation is provided in the middle of the cutting blade 1.

[0031] A blade slot 31 is provided at one end of the tool rod 3, and the cutting blade 1 is installed in the blade slot 31. The blade slot 31 includes a slot bottom surface 301, a longitudinal positioning slot wall 302 and a transverse positioning slot wall 303; the longitudinal positioning slot wall 302 / or the transverse positioning slot wall 303 forms an angle β with the slot bottom surface 301; a blade slot center hole 304 for installation is provided in the middle of the slot bottom surface 301.

[0032] Since the angle formed by the longitudinal positioning surface 104 or the transverse positioning surface 103 and the lower surface 102 of the blade is the same as the angle formed by the longitudinal positioning groove wall 302 / or the transverse positioning groove wall 303 and the groove bottom surface 301, both are β. Therefore, when the cutting blade 1 is installed in place, the lower surface 102 of the blade, the longitudinal positioning surface 104 and the transverse positioning surface 103 can be seamlessly and tightly fitted with the groove bottom surface 301, the longitudinal positioning groove wall 302 and the transverse positioning groove wall 303 respectively, effectively preventing the cutting blade 1 from shaking, moving and other undesirable phenomena due to loose fitting and gaps. The fitting here refers to the fitting between surfaces. And because β is an acute angle, that is, 83°≦β≦87°, such as Figure 4 As shown, the downward movement of the cutting blade 1 along the axis of the blade center hole 105 is not only blocked and restricted by the groove bottom surface 301, but the upward movement is also blocked and restricted by the longitudinal positioning groove wall 302 or the transverse positioning groove wall 303 of the blade groove 31, thereby effectively limiting the shaking of the cutting blade 1 along the axis of the center hole.

[0033] In this embodiment, when the longitudinal cutting force of the cutting tool and the downward feed force of the workpiece rotate simultaneously, the transverse positioning surface 103 and the longitudinal positioning surface 104 respectively form a Z-shaped interlocking fit with the transverse positioning groove wall 303 and the longitudinal positioning groove wall 302 to form a firm locking method.

[0034] It should be noted that although the present application limits the angle formed by the longitudinal positioning surface 104 or the transverse positioning surface 103 and the lower surface 102 of the blade to be the same as the angle formed by the longitudinal positioning groove wall 302 / or the transverse positioning groove wall 303 and the groove bottom surface 301, due to the errors that are inevitably present in actual processing, it should be allowed that the above two angles are the same within a certain error range.

[0035] The blade lower surface 102 , the longitudinal positioning surface 104 , the transverse positioning surface 103 , the groove bottom surface 301 , the longitudinal positioning groove wall 302 and the transverse positioning groove wall 303 are all flat surfaces.

[0036] like Figure 5 As shown, the blade upper surface 101 and the blade lower surface 102 are approximately parallelograms.

[0037] The insert upper surface 101 and the insert lower surface 102 are rotationally symmetric about the insert center hole 105 .

[0038] As an embodiment, the longitudinal positioning surface 104 and the transverse positioning surface 103 respectively form an angle β with the blade lower surface 102; the longitudinal positioning groove wall 302 and the transverse positioning groove wall 303 also respectively form an angle β with the groove bottom surface 301.

[0039] As an embodiment, the longitudinal positioning surface 104 and the lower surface 102 of the blade, the longitudinal positioning groove wall 302 and the groove bottom surface 301 all form an angle β1; the transverse positioning surface 103 and the lower surface 102 of the blade, the transverse positioning groove wall 303 and the groove bottom surface 301 all form an angle β2; 83°≦β1≦87°, 83°≦β2≦87°, β1 is equal to or not equal to β2.

[0040] As an embodiment, the blade side surface includes a pair of oppositely disposed longitudinal side surfaces 107a, 107b and a pair of oppositely disposed transverse side surfaces 108a, 108b; the longitudinal side surfaces 107a, 107b include a longitudinal positioning surface 104 connected to the blade upper surface 101, and a longitudinal lower side surface 106 connected to the blade lower surface 102, the longitudinal positioning surface 104 and the longitudinal lower side surface 106 are connected and intersected to form a first intersection line x; the transverse side surfaces 108a, 108b include a transverse positioning surface 103 connected to the blade upper surface 101, and a transverse lower side surface connected to the blade lower surface 102, the transverse positioning surface 103 and the transverse lower side surface are connected and intersected to form a second intersection line (not shown in the figure); as shown in FIG. Figure 4 As shown, the angles formed by the longitudinal lower side surface 106 and the transverse lower side surface with the lower surface 102 of the blade are both greater than or equal to angle β, so that a certain gap is formed between the longitudinal lower side surface 106 and the side wall of the blade groove 31, which is beneficial to the manufacturing and processing of the cutting blade 1 and convenient for installation. The same is true for the transverse lower side surface (not shown in the transverse lower side surface figure).

[0041] The side wall of the blade slot 31 includes a longitudinal side wall on one side and a transverse side wall on one side; the longitudinal side wall includes a longitudinal positioning slot wall 302 connected to the slot bottom surface 301, and a longitudinal upper side wall 305 extending to the top of the blade slot 31, the longitudinal positioning slot wall 302 is connected to the longitudinal upper side wall 305 and intersects to form a third intersection line y; the transverse side wall includes a transverse positioning slot wall 303 connected to the slot bottom surface 301, and a transverse upper side wall extending to the top of the blade slot 31, the transverse positioning slot wall 303 is connected to the transverse upper side wall and intersects to form a fourth intersection line (not shown in the figure); Figure 4 As shown, the angles formed by the longitudinal upper side wall 305 and the transverse upper side wall with the groove bottom surface 301 are both greater than or equal to angle β, so that a certain gap is formed between the longitudinal upper side wall 305 and the side of the cutting blade 1, which is beneficial to the installation and fixation of the cutting blade 1. The same is true for the transverse upper side wall (the transverse upper side wall is not shown in the figure).

[0042] In the normal direction of the groove bottom surface 301, the length of the contact surface between the longitudinal positioning surface 104 and the longitudinal positioning groove wall 302 is b1, the length of the longitudinal upper side wall 305 is a1, and the length of the longitudinal lower side surface 106 is c1; or in other words, in the normal direction of the groove bottom surface 301, the thickness of the contact surface between the longitudinal positioning surface 104 and the longitudinal positioning groove wall 302 is b1, the thickness of the longitudinal upper side wall 305 is a1, and the thickness of the longitudinal lower side surface 106 is c1; b1>a1≥c1. b1 means Figure 4 The distance from the first intersection line x to the third intersection line y (in the normal direction of the groove bottom surface 301), a1 is Figure 4 From the top of the middle insert slot 31 to the first intersection line x (in the normal direction of the slot bottom surface 301), c1 is Figure 4 The distance from the third intersection line y to the lower surface 102 of the blade (in the normal direction of the groove bottom surface 301). The contact surface between the longitudinal positioning surface 104 and the longitudinal positioning groove wall 302 is the main positioning surface. The larger the main positioning surface, the more stable the force. The longitudinal upper side wall 305 and the longitudinal lower side surface 106 play the role of clamping and avoiding air.

[0043] In the normal direction of the groove bottom surface 301, the length of the fitting surface between the transverse positioning surface 103 and the transverse positioning groove wall 303 is b2, the length of the transverse upper side wall is a2, and the length of the transverse lower side surface is c2; or in other words, in the normal direction of the groove bottom surface 301, the thickness of the fitting surface between the transverse positioning surface 103 and the transverse positioning groove wall 303 is b2, the thickness of the transverse upper side wall is a2, and the thickness of the transverse lower side surface is c2; b2>a2≥c2.

[0044] The longitudinal lower side surface 106, the transverse lower side surface, the longitudinal upper side wall 305 and the transverse upper side wall are all flat surfaces.

[0045] like Figure 5As shown, a longitudinal side surface 107a, 107b and a transverse side surface 108a, 108b intersect at an obtuse angle and are connected to form a group of positioning units. A pair of oppositely arranged longitudinal side surfaces 107a, 107b and a pair of oppositely arranged transverse side surfaces 108a, 108b together constitute a pair of oppositely arranged positioning units, and this pair of positioning units are distributed on both sides of the blade center hole 105.

[0046] As an embodiment, a fastener 2 is also included. The fastener 2 is inserted into the blade center hole 105 and the blade slot center hole 304 to install and fix the cutting blade 1 on the blade slot 31.

[0047] The fastener 2 is a fastening screw.

[0048] The center axis n2 of the fastener 2, the center axis n1 of the blade center hole 105, and the center axis n3 of the blade slot center hole 304 coincide with each other.

[0049] The cutting insert 1 is rotationally symmetrical by 180° about the center axis n1 of the insert center hole 105 .

[0050] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A cutting tool having a positioning surface, characterized in that: include: A cutting blade, comprising a blade upper surface, a blade lower surface, and a blade side surface connecting the blade upper surface and the blade lower surface; The blade side has a longitudinal positioning surface and a transverse positioning surface, and the longitudinal positioning surface and / or the transverse positioning surface respectively form an angle β with / with the lower surface of the blade; A tool bar, one end of which is recessed to form a blade groove for accommodating the cutting blade, the blade groove having a groove bottom surface, a longitudinal positioning groove wall and a transverse positioning groove wall, the longitudinal positioning groove wall and / or the transverse positioning groove wall respectively forming an angle β with / with the groove bottom surface; Among them, 83°≦β≦87°, the lower surface of the blade, the longitudinal positioning surface and the transverse positioning surface are respectively in contact with the groove bottom surface, the longitudinal positioning groove wall and the transverse positioning groove wall.

2. A cutting tool with a positioning surface as claimed in claim 1, characterized in that: The lower surface of the blade, the longitudinal positioning surface, the transverse positioning surface, the groove bottom surface, the longitudinal positioning groove wall and the transverse positioning groove wall are all flat surfaces.

3. A cutting tool with a positioning surface as claimed in claim 2, characterized in that: The blade side includes a pair of oppositely arranged longitudinal side surfaces and a pair of oppositely arranged transverse side surfaces; the longitudinal side surface includes the longitudinal positioning surface connected to the upper surface of the blade, and the longitudinal lower side surface connected to the lower surface of the blade; the transverse side surface includes the transverse positioning surface connected to the upper surface of the blade, and the transverse lower side surface connected to the lower surface of the blade; the angles formed by the longitudinal lower side surface and the transverse lower side surface with the lower surface of the blade are both greater than or equal to angle β.

4. A cutting tool with a positioning surface as claimed in claim 3, characterized in that: The side walls of the blade slot include longitudinal side walls and transverse side walls; the longitudinal side walls include the longitudinal positioning slot walls connected to the slot bottom surface, and the longitudinal upper side walls extending to the top of the blade slot; the transverse side walls include the transverse positioning slot walls connected to the slot bottom surface, and the transverse upper side walls extending to the top of the blade slot; the angles formed by the longitudinal upper side walls and the transverse upper side walls with the slot bottom surface are both greater than or equal to angle β.

5. A cutting tool with a positioning surface as claimed in claim 4, characterized in that: In the normal direction of the groove bottom surface, the length of the fitting surface between the longitudinal positioning surface and the longitudinal positioning groove wall is b1, the length of the longitudinal upper side wall is a1, and the length of the longitudinal lower side surface is c1, b1>a1≥c1.

6. A cutting tool with a positioning surface as claimed in claim 4, characterized in that: In the normal direction of the groove bottom surface, the length of the fitting surface between the transverse positioning surface and the transverse positioning groove wall is b2, the length of the transverse upper side wall is a2, and the length of the transverse lower side surface is c2, b2>a2≥c2.

7. A cutting tool with a positioning surface according to any one of claims 1 to 6, characterized in that: The longitudinal lower side surface, the transverse lower side surface, the longitudinal upper side wall and the transverse upper side wall are all flat surfaces.

8. A cutting tool with a positioning surface according to any one of claims 1 to 6, characterized in that: It also includes a fastener, and the cutting blade and the blade slot both have a center hole for accommodating the fastener; the center axis of the fastener, the center axis of the cutting blade center hole, and the center axis of the blade slot center hole coincide with each other.

9. A cutting tool with a positioning surface as claimed in claim 8, characterized in that: The cutting insert is rotationally symmetrical at 180° about the central axis of the central hole.

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