CN102601403B - Tool holder for grooving cutting blade - Google Patents

Abstract

The invention discloses a tool holder for grooving cutting blades, which comprises a tool holder body and fasteners. The clamping part of the tool holder body is composed of an upper clamping part and a lower supporting part. The upper clamping The upper positioning surface of the upper part and the lower positioning surface of the lower supporting part encircle a blade clamping groove, and the rear end of the blade clamping groove is provided with a rear supporting surface and an elastic extension section, and the elastic extension section extends backward to the blade Clamp the neck of the body, the fastener passes through the elastic extension to connect the upper and lower parts, the upper positioning surface is provided with M discontinuous upper positioning platforms, and the lower positioning surface is provided with N discontinuous lower positioning platform, 2≤M≤6, 2≤N≤6. The tool holder for cutting inserts for grooving can automatically adjust the positioning position and angle, has a stable structure, can effectively inhibit the plastic deformation of the tool body, and has a long service life.

Description

A tool holder for grooving cutting inserts

technical field

The invention relates to the field of metal cutting, in particular to a tool holder for cutting inserts for groove processing.

Background technique

The positioning of the tool holder for cutting inserts for grooving in the up and down direction of the cutter body is realized through the upper and lower positioning surfaces of the cutter body. According to the shape of the positioning surface of the blade, the upper and lower positioning surfaces of the cutter body are generally concave or convex. The cutter body is easy to manufacture and easy to use; at the same time, the upper and lower positioning surfaces are concave, which increases the effective contact area of the cutter body positioning surface, strengthens the ability of the cutter body to bear loads on the side and end faces, and ensures the service life of the cutter body; in addition, the cutter body positioning The large-area contact of the cutting tool can make the positioning surface of the cutting tool only slightly deformed when it bears a large load, effectively ensuring the consistency of the dimensional accuracy of the cutting tool in the static state and during processing, and improving the precision of the cutting tool under different working conditions. stability. Since the tool holder for grooving cutting inserts adopts the upper and lower concave surfaces to contact and has the above advantages, this structure is widely used in grooving cutting tools.

Although the tool holder for grooving cutting inserts adopts the positioning structure of the concave upper and lower positioning surfaces, there are some problems. Due to the existence of cutting tool manufacturing error, detection fixture processing error, detection error and sintering deformation of the blade; at the same time, during the cutting process of the blade clamped by the cutter body, the upper and lower positioning surfaces of the cutter body bear a large change of load, and the upper and lower positioning surfaces of the cutter body are very large. It is difficult to completely contact and locate the blade, so that during the cutting process, the upper and lower concave surfaces of the cutter body and the positioning of the blade are basically in contact with the edge line or the protruding part of the blade deformation. The line contact position between the cutter body and the blade is at the middle position and the edge position of the upper and lower concave surfaces. When the line contact is at the middle side position of the cutter body, the cutter body will lose the positioning effect of the side direction. When the cutting tool is cutting sideways, the cutter body will Unstable clamping will cause rapid wear or fatigue damage of the cutter body; when the line contact is at the edge of the side plane of the cutter body, the edge load of the upper and lower concave surfaces of the cutter body is too large, because the wall thickness between the upper and lower concave surfaces of the cutter body and the side is too small, The shear stress on the upper and lower concave surfaces of the cutter body is too large, which can easily cause plastic deformation of the upper and lower concave surfaces of the blade. When the upper and lower concave surfaces of the cutter body and the protruding parts of the blade play a positioning role, the clamping of the cutter body is unstable, and the blade is separated from the cutter body during cutting, and the cutter body replaces the blade to participate in cutting, causing damage to the cutter body and reducing the service life of the cutter.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide a tool holder for slotting cutting blades that can automatically adjust the positioning position and angle, has a stable structure, can effectively inhibit the plastic deformation of the tool body, and has a long service life. .

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A tool holder for grooving cutting inserts, including a tool holder body and fasteners, the clamping part of the tool holder body is composed of an upper clamping part and a lower support part, and the upper positioning of the upper clamping part The lower positioning surface of the surface and the lower supporting part encloses a blade clamping groove, and the rear end of the blade clamping groove is provided with a rear supporting surface and an elastic extension section, and the elastic extension section extends backward to the neck of the knife holder body. part, the fastener passes through the elastic extension section to connect the upper and lower parts, the upper positioning surface is provided with M discontinuous upper positioning platforms, and the lower positioning surface is provided with N discontinuous Lower positioning platform, 2≤M≤6, 2≤N≤6.

Let the plane parallel to the two sides of the clamping part and equal to the distance from the two sides be the median plane, the width of the clamping part is D, and the distance between the upper positioning platform and the adjacent side faces The minimum distance is L1, the minimum distance between the upper positioning platform and the middle plane is L1', the minimum distance between the lower positioning platform and the adjacent side is L2, and the lower positioning platform and the The minimum distance between the mid-planes is L2', 0.05D≤L1≤0.1D, 0.05D≤L1'≤0.1D, 0.05D≤L2≤0.1D, 0.05D≤L2'≤0.1D.

The angle between the upper positioning platforms on both sides of the midplane is α, the angle between the lower positioning platforms on both sides of the midplane is β, 80°≤α≤160°, 80°≤β≤160 °.

The height of the upper positioning platform relative to the upper positioning surface is H1, 0.3L1≤H1≤0.5L1, 0.3L1'≤H1≤0.5L1', and the height of the lower positioning platform relative to the lower positioning surface is H2, 0.3L2 ≤H2≤0.5L2, 0.3L2'≤H2≤0.5L2'.

The upper positioning platform is provided with a first upper plane on the inner side and a second upper plane on the outer side, the angle between the first upper planes of the upper positioning platform on both sides of the middle plane is α1, and the middle plane The angle between the second upper plane of the upper positioning table on both sides is α1', 80°≤α1≤160°, 80°≤α1'≤160°, and 0.3°≤(α1'-α1)≤3° .

The lower positioning platform is provided with a first lower plane on the inner side and a second lower plane on the outer side, the included angle between the first lower planes of the lower positioning platforms on both sides of the middle plane is β1, and the middle plane The angle between the second lower planes of the lower positioning platforms on both sides is β1', 80°≤β1≤160°, 80°≤β1'≤160°, and 0.3°≤(β1'-β1)≤3° .

There are two upper positioning platforms and two lower positioning platforms respectively, the two upper positioning platforms are arranged symmetrically along the middle plane, and the two lower positioning platforms are arranged symmetrically along the middle plane.

Compared with the prior art, the present invention has the advantages of:

1. The tool holder for cutting blades for grooving of the present invention is provided with a certain number of upper or lower positioning platforms on the upper positioning surface and the lower positioning surface of the tool holder body respectively. By setting the upper positioning platform and the lower positioning platform, The table can effectively control the area where the upper and lower directions of the tool holder participate in the positioning of the blade, and the clamping and positioning of the blade is more accurate and stable; the number and size of the upper positioning table and the lower positioning table can be accurately set to suppress the deformation of the blade and prevent the actual cutting process. During the process, the positioning contact area of the tool holder body is reduced, the ability of the tool holder body to withstand cutting force and plastic deformation is improved, and the positioning stability of the cutting tool is increased.

2. Accurately design the distance between the upper positioning platform and the lower positioning platform and the adjacent side, so that the tool holder body can automatically adjust the positioning position and angle of the upper positioning platform and the lower positioning platform within a certain range. When the blade and the tool holder When the contact of the body occurs on the outer edge of the upper and lower positioning platforms, it can reduce the shear stress of the upper and lower positioning faces in the side direction, and effectively restrain the plastic deformation of the upper and lower positioning faces; when the contact between the blade and the tool holder body occurs When it is on the inner side of the upper and lower positioning tables, it can prevent the blade from being on the middle plane of the tool holder body, so as to ensure that the cutting tool can transmit a large cutting force in the side direction, and prevent the cutting tool from being damaged due to unstable clamping of the tool body. Wears out quickly.

3. Accurately design the angle between the corresponding planes of the upper positioning platform and the lower positioning platform, so that when the upper positioning surface and the lower positioning surface of the toolholder body are elastically deformed, the positioning position and angle of the upper positioning platform and the lower positioning platform can be automatically adjusted , which reduces the accuracy requirements of the tool, and at the same time maintains the wall thickness between the contact part of the tool holder body and the side to ensure the strength of the clamping part.

Description of drawings

Fig. 1 is a schematic perspective view of the first embodiment of the present invention.

Figure 2 is an end view of a first embodiment of the invention.

Fig. 3 is an enlarged view of A in Fig. 2 .

Fig. 4 is a three-dimensional structural schematic view of the blade corresponding to the tool holder of the present invention.

Figure 5 is an end view of a second embodiment of the present invention.

Fig. 6 is an enlarged view at B in Fig. 5 .

Fig. 7 is a schematic perspective view of the third embodiment of the present invention.

Figure 8 is an end view of a third embodiment of the present invention.

Each label in the figure means:

1. Tool holder body; 2. Fasteners; 3. Blade clamping groove; 4. Side; 5. Midplane; 6. Blade; 11. Neck; 12. Upper clamping part; 31, rear support surface; 61, upper V-shaped surface; 62, lower V-shaped surface; 63, blade end face; 121, upper positioning surface; 122, upper positioning platform; 131, lower positioning surface; 132, lower positioning platform; 311 , the elastic extension section; 1221, the first upper plane; 1222, the second upper plane; 1321, the first lower plane; 1322, the second lower plane.

Detailed ways

Fig. 1 to Fig. 3 have shown the embodiment of the tool holder of the first kind of cutting blade that is used for grooving of the present invention, and it comprises tool holder body 1 and fastener 2, and the clamping part of tool holder body 1 is clamped by upper The tightening part 12 and the lower support part 13 constitute, the upper positioning surface 121 of the upper clamping part 12 and the lower positioning surface 131 of the lower support part 13 encircle a blade clamping groove 3, and the rear end of the blade clamping groove 3 is provided with a rear The support surface 31 and the elastic extension section 311, the elastic extension section 311 extends backward to the neck 11 of the tool holder body 1, the fastener 2 passes through the elastic extension section 311 to connect the upper and lower parts, the upper positioning surface 121 and the lower The positioning surface 131 is recessed inwardly in the direction of installing the blade 6, the upper positioning surface 121 is provided with M discontinuous upper positioning platforms 122, and the lower positioning surface 131 is provided with N discontinuous lower positioning platforms 132, 2≤ M≤6, 2≤N≤6, on the upper positioning surface 121 and the lower positioning surface 131 of the tool holder body 1, a certain number of upper positioning platforms 122 and lower positioning platforms 132 are respectively arranged, by setting the upper positioning platform 122 and the lower positioning platform The positioning table 132 can effectively control the area where the tool holder participates in the blade positioning in the upper and lower directions, and the clamping and positioning of the blade 6 is more accurate and stable; the number and size of the upper positioning table 122 and the lower positioning table 132 can be accurately set to suppress the deformation of the blade 6 , to prevent the reduction of the positioning contact area of the tool holder body 1 during the actual cutting process, improve the ability of the tool holder body 1 to bear cutting force and resist plastic deformation, and increase the positioning stability of the cutting tool.

Suppose the plane parallel to the two sides 4 of the clamping part and equal to the distance from the two sides 4 is the middle plane 5. In this embodiment, the upper positioning platform 122 is set to two, and the lower positioning platform 132 is set to two. In order to manufacture And easy to use, the two upper positioning platforms 122 are arranged symmetrically along the middle plane 5, and the two lower positioning platforms 132 are arranged symmetrically along the middle plane 5, but the present invention is not limited thereto. According to different actual working conditions and applications, in other embodiments , the upper positioning platform 122 and the lower positioning platform 132 of the tool holder body 1 can be designed as a structure that is not symmetrical with respect to the middle plane 5 . Suppose the width of the clamping portion is D, the minimum distance between the upper positioning platform 122 and the adjacent side 4 is L1, the minimum distance between the upper positioning platform 122 and the middle plane 5 is L1 ', the lower positioning platform 132 and the corresponding The minimum distance between adjacent side surfaces 4 is L2, and the minimum distance between the lower positioning platform 132 and the middle plane 5 is L2'. The shear stress in the 4 directions of the side surface and the plastic deformation of the upper positioning surface 121 and the lower positioning surface 131 are suppressed. The upper positioning platform 122 and the lower positioning platform 132 need to be provided with a suitable wall thickness between the side surface 14, so L1 and L2 The value range is set to 0.05D≤L1≤0.1D, 0.05D≤L2≤0.1D; in order to ensure that the tool holder body 1 can transmit a large cutting force in the direction of the side 4, and prevent the tool holder body 1 from being unstable due to clamping And fast wear, so the value range of L1' and L2' is set to 0.05D≤L1'≤0.1D, 0.05D≤L2'≤0.1D, according to different actual working conditions L1, L2, L1', L2' The value of can be selected in the above-mentioned range, in the present embodiment, L1=L2=L1'=L2'=0.07D.

Further, the included angle between the two upper positioning platforms 122 is α, and the included angle between the two lower positioning platforms 132 is β. All directions can withstand a large cutting force transmitted by the blade, 80°≤α≤160°, 80°≤β≤160°, in this embodiment, α=140°, β=140°. The height of the upper positioning platform 122 relative to the upper positioning surface 121 is H1, and the height of the lower positioning platform 132 relative to the lower positioning surface 131 is H2. In the cutting process, due to the existence of manufacturing and inspection errors, the upper positioning of the tool holder body 1 There is a certain deviation between the actual use value of α and β of table 122 and lower positioning table 132 and the theoretical value. At the same time, according to the different processing conditions, the different forces of upper positioning table 122 and lower positioning table 132 can also cause angles α, The deviation between β and the theoretical value, when there is a deviation between the actual value of the angle α and β and the theoretical value, the upper positioning platform 122 and the lower positioning platform 132 of the tool holder body 1 do not all participate in the positioning, but automatically adjust the upper positioning platform 122 and the lower positioning platform. The positioning position and angle of the positioning platform 132, in order to prevent the inside or outside positioning of the upper positioning platform 122 and the lower positioning platform 132, the upper positioning surface 121 and the lower positioning surface 131 of the tool holder body 1 do not interfere with the upper positioning platform 122 and the lower positioning surface. The positioning of the inside or outside of the table 132, 0.3L1≤H1≤0.5L1, 0.3L1'≤H1≤0.5L1', 0.3L2≤H2≤0.5L2, 0.3L2'≤H2≤0.5L2', in this embodiment, H1= H2=0.4L1.

Fig. 5 and Fig. 6 have shown the embodiment of the tool holder of the second kind of cutting blade that is used for grooving of the present invention, this embodiment is basically the same as the first embodiment, the only difference is that the upper positioning table 122 is provided with the The first upper plane 1221 and the second upper plane 1222 located on the outside, the angle between the first upper planes 1221 of the two upper positioning platforms 122 is α1, and the angle between the second upper planes 1222 of the two upper positioning platforms 122 The included angle is α1', the lower positioning platform 132 is provided with a first lower plane 1321 located on the inner side and a second lower plane 1322 located on the outer side, and the included angle between the first lower planes 1321 of the two lower positioning platforms 132 is β1 1. The included angle between the second lower planes 1322 of the two lower positioning platforms 132 is β1', in order to ensure that the tool holder body 1 can bear the relatively high force transmitted by the blade on the side 4, the upper positioning platform 122 and the lower positioning platform 132 directions Large cutting force, 80°≤α1≤160°, 80°≤α1'≤160°, 80°≤β1≤160°, 80°≤β1'≤160°, in this embodiment, α1=α1'=β1 =β1'=140°; during the cutting process of the cutting tool, both the upper positioning platform 122 and the lower positioning platform 132 of the toolholder body 1 are elastically deformed and spread outwards, in order to make the upper positioning platform 122 of the toolholder body 1, The lower positioning platform 132 can automatically adjust the position and angle, and it needs to make 0.3°≤(α1'-α1)≤3°, 0.3°≤(β1'-β1)≤3°, in this embodiment, α1'-α1=1.5 °, β1'-β1=1.5°. In addition, in other embodiments, multiple sets of planes with different angles can be set on the upper positioning platform 122 and the lower positioning platform 132, so as to meet the positioning requirements of the upper positioning platform 122 and the lower positioning platform 132.

Fig. 4 shows a blade 6 corresponding to the tool holder of the present invention, the blade 6 is positioned by three positioning surfaces, and the positioning of the blade 6 in the up and down direction is achieved by an upper V-shaped surface 61 and a lower V-shaped surface 62 positioning, and the end is positioned by the blade end surface 63 of the blade 6, the upper V-shaped surface 61 is used to contact and cooperate with the upper positioning platform 122, the lower V-shaped surface 62 is used to contact and cooperate with the lower positioning platform 132, and the blade end surface 63 is used for In contact with the rear support surface 31 , the blade 6 can be adapted to the toolholders in the first embodiment and the second embodiment.

Fig. 7 and Fig. 8 have shown the embodiment of the third kind of toolholder of the present invention that is used for grooving cutting blade, and in this embodiment, upper positioning surface 121 and lower positioning surface 131 protrude inward toward the direction of installing blade From the beginning, the upper positioning table 122 and the lower positioning table 132 are provided with four respectively, and all adopt the structure of symmetrical arrangement, such design can strengthen the intensity of blade, prevent the blade from breaking and missing, and can prolong the service life of cutting tool. In other embodiments, a combination of an inwardly convex upper positioning surface 121 and an inwardly concave lower positioning surface 131 may be used, or a combination of an inwardly concave upper positioning surface 121 and an inwardly convex lower positioning surface 131 may be used. .

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent implementation of equivalent changes example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention. the

Claims (5)

1. A tool holder for grooving cutting inserts, including a tool holder body (1) and fasteners (2), the clamping part of the tool holder body (1) consists of an upper clamping part (12) and The lower supporting part (13) is formed, the upper positioning surface (121) of the upper clamping part (12) and the lower positioning surface (131) of the lower supporting part (13) enclose a blade clamping groove (3), so The rear end of the blade clamping groove (3) is provided with a rear supporting surface (31) and an elastic extension section (311), and the elastic extension section (311) extends backward to the neck (11) of the tool holder body (1). ), the fastener (2) passes through the elastic extension section (311) to connect the upper and lower parts, and it is characterized in that: the upper positioning surface (121) is provided with M discontinuous upper positioning platforms ( 122), the lower positioning surface (131) is provided with N discontinuous lower positioning platforms (132), 2≤M≤6, 2≤N≤6, the bottom surface of the upper positioning platform (122) and the The top surface of the lower positioning platform (132) is positioned in contact with the blade, and the plane parallel to the two sides (4) of the clamping part and equal to the distance from the two sides (4) is set as the middle plane (5). The width of the clamping part is D, the minimum distance between the upper positioning platform (122) and the adjacent side (4) is L1, and the upper positioning platform (122) and the middle plane (5 ) is L1', the minimum distance between the lower positioning platform (132) and the adjacent side (4) is L2, and the lower positioning platform (132) and the middle plane ( 5) The minimum distance between L2', 0.05D≤L1≤0.1D, 0.05D≤L1'≤0.1D, 0.05D≤L2≤0.1D, 0.05D≤L2'≤0.1D, the upper positioning stage (122) The height relative to the upper positioning surface (121) is H1, 0.3L1≤H1≤0.5L1, 0.3L1'≤H1≤0.5L1', the lower positioning platform (132) is relative to the lower positioning surface (131) The height is H2, 0.3L2≤H2≤0.5L2, 0.3L2'≤H2≤0.5L2'. 2. The toolholder for grooving cutting inserts according to claim 1, characterized in that: the angle between the upper positioning platforms (122) on both sides of the mid-plane (5) is α, and the mid-plane (5) The included angle between the lower positioning platforms (132) on both sides of the plane (5) is β, 80°≤α≤160°, 80°≤β≤160°. 3. The tool holder for grooving cutting inserts according to claim 1, characterized in that: the upper positioning table (122) is provided with a first upper plane (1221) located on the inner side and a second upper plane (1221) located on the outer side plane (1222), the angle between the first upper plane (1221) of the upper positioning platform (122) on both sides of the middle plane (5) is α1, and the upper positioning platform on both sides of the middle plane (5) The angle between the second upper plane (1222) of (122) is α1', 80°≤α1≤160°, 80°≤α1'≤160°, and 0.3°≤(α1'-α1)≤3° . 4. The toolholder for grooving cutting inserts according to claim 1, characterized in that: the lower positioning table (132) is provided with a first lower plane (1321) located on the inner side and a second lower plane (1321) located on the outer side. plane (1322), the angle between the first lower plane (1321) of the lower positioning platform (132) on both sides of the middle plane (5) is β1, and the lower positioning platform on both sides of the middle plane (5) The angle between the second lower plane (1322) of (132) is β1', 80°≤β1≤160°, 80°≤β1'≤160°, and 0.3°≤(β1'-β1)≤3° . 5. The toolholder for grooving cutting inserts according to any one of claims 2 to 4, characterized in that: the upper positioning table (122) and the lower positioning table (132) are respectively set as two One, the two upper positioning platforms (122) are arranged symmetrically along the middle plane (5), and the two lower positioning platforms (132) are arranged symmetrically along the middle plane (5).

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