A bidirectionally drivable clamped slotting tool

Abstract

The application discloses a bidirectional driving clamping slotting tool, which comprises a tool body and a slotting blade, the tool body is provided with a blade accommodating groove, the slotting blade is installed in the blade accommodating groove, the slotting tool further comprises an upper fastener, a lower clamping part and a side driving part, the tool body is further provided with an elastic deformation groove to divide the tool body into an upper clamping part and a lower supporting part corresponding to the blade accommodating groove, the upper fastener is installed on the upper clamping part and is in threaded connection with the lower clamping part installed on the lower supporting part, the side part of the lower clamping part is provided with a clamping taper hole, the side part of the tool body is provided with the driving taper surface matched with the clamping taper hole, the center axis of the driving taper surface is parallel to the center axis of the clamping taper hole and is provided with a downward eccentricity E, and the following condition should be met: 0.2mm≤E≤0.5mm. The application has the advantages of stable and reliable structure, high clamping force and convenient replacement of the slotting blade.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of metal cutting, in particular to a slotting tool capable of bidirectional driving clamping. BACKGROUND

[0002] Slotting tool is one of the most commonly used numerical control tools in numerical control machining. In the tool holder structure of numerical control machine tools such as horizontal and vertical lathes, the tool positions are relatively sparse, and the space between tools is relatively large. It is very convenient to assemble and disassemble the tool bit through the fastener from the tool top surface. With the increasing demand for high-quality product processing in various industries, the bar lathe gradually replaces the conventional numerical control lathe due to its high machining precision, high production efficiency and high automation level. The bar lathe is compactly assembled with multiple square handle tools in a vertical arrangement of tool holders. The top surface of the tool is directly opposite to the bottom surface of the adjacent tool. In order to arrange more tools, the distance between the two adjacent tools is very small. The existing center numerical control slotting tool adopts the fastener on the top surface of the tool to clamp and replace the tool bit from the top surface. This is not enough for the wrench space of the compact tool arrangement structure of the bar lathe, and the tool bit cannot be replaced.

[0003] To solve the above problems, using a slotting tool capable of clamping from the side is an effective method. Such structure not only needs to ensure that the slotting tool bit can be reliably clamped, but also needs to realize the replacement of the tool bit from the side. Generally, the structure is complex and the clamping reliability is not high.

[0004] For example, Chinese patent document CN103987479B discloses a side locking clamping device. The tool bit is clamped in the tool groove accommodating groove by the action of the locking component on the taper hole in the clamping component. However, the slotting tool in this technical solution can only lock and replace the tool bit from the side, which causes inconvenience in some cutting applications. The clamping of the tool bit is through the side locking component to transmit force to the clamping component on the top surface. Compared with the traditional top screw locking structure, the clamping reliability is poorer under the condition of large cutting parameters. SUMMARY

[0005] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a slotting tool capable of bidirectional driving clamping, which has stable and reliable structure, high clamping force, is convenient to replace the slotting tool bit and has wide application range.

[0006] To solve the above technical problems, the present application adopts the following technical solutions:

[0007] A bidirectional driving clamping slotting tool, comprising a tool body and a slotting blade, a blade accommodating groove is formed on the tool body, the slotting blade is installed in the blade accommodating groove, the tool further comprises an upper fastener, a lower clamping part and a side driving part, a resilient deformation groove is formed on the tool body to divide the tool body into an upper clamping part and a lower supporting part corresponding to the blade accommodating groove, the upper fastener is installed on the upper clamping part and is threadedly connected with the lower clamping part installed on the lower supporting part, a clamping taper hole is formed on the side of the lower clamping part, the side driving part is installed on the side of the tool body and has a driving taper surface at the end thereof, the center axis of the driving taper surface is parallel to the center axis of the clamping taper hole and has a downward eccentricity E, and the following conditions should be met: 0.2mm≤E≤0.5mm.

[0008] As a further improvement of the above technical solution:

[0009] A locking accommodating hole is formed on the tool body and penetrates the upper clamping part and the lower supporting part, the locking accommodating hole comprises an upper accommodating section, a limiting section and a lower accommodating section arranged in sequence, the internal diameter of the limiting section is smaller than the internal diameters of the upper accommodating section and the lower accommodating section, the upper fastener comprises a limiting head and a threaded part, an internal thread hole is formed on the lower clamping part, the limiting head is arranged in the upper accommodating section, and the threaded part is connected with the internal thread hole of the lower clamping part arranged in the lower accommodating section through the limiting section.

[0010] A gap L is formed between the outer circumferential surface of the limiting head and the inner wall of the upper accommodating section, between the threaded part and the inner wall of the limiting section, and between the outer circumferential surface of the lower clamping part and the lower accommodating section, and the following condition should be met: L≥0.2mm.

[0011] The upper fastener and the lower clamping part are coaxial and the axis thereof is perpendicular to the center axis of the side driving part.

[0012] Two clamping taper holes are formed on the side of the lower clamping part, and two side driving parts are correspondingly arranged on the two sides of the tool body.

[0013] The taper angle of the driving taper surface is α, and the taper angle of the clamping taper hole is β, and the following conditions should be met: α=β, 20°≤α≤60°, 20°≤β≤60°.

[0014] The side driving part is threadedly connected with the tool body through the external thread formed on the outer circumferential surface thereof.

[0015] The distance between the limiting surface of the upper accommodating section and the resilient deformation groove is L1, and the distance between the limiting surface of the lower accommodating section and the resilient deformation groove is L2, and the following conditions should be met: L1≥2mm, L2≥2mm.

[0016] An internal wrench hole is formed on the outer end surface of the side driving part.

[0017] Compared with the prior art, the present application has the advantages of:

[0018] The two-way driving and clamping groove cutting tool of the present application further comprises an elastic deformation groove formed on the tool body to divide the tool blade accommodating groove into an upper clamping part and a lower supporting part, an upper fastener is arranged on the upper clamping part and is threadedly connected with a lower clamping part arranged on the lower supporting part, a clamping taper hole is formed on the side of the lower clamping part, a side driving member is arranged on the side of the tool body and has a driving taper surface at the end thereof, the center axis of the driving taper surface is parallel to the center axis of the clamping taper hole and is provided with a downward eccentricity E, and the following conditions should be met: 0.2mm≤E≤0.5mm. During installation, the lower clamping part is first installed on the tool body, and the rotation and falling of the lower clamping part are limited by installing the side driving member, the upper fastener is threadedly connected with the lower clamping part by rotating the upper fastener, and the installation of the upper fastener, the lower clamping part and the side driving member is completed. After the groove cutting blade is placed in the blade accommodating groove, the upper fastener is continuously rotated until the groove cutting blade is clamped, i.e. the groove cutting blade is clamped from the top surface. The groove cutting blade can be replaced by loosening the upper fastener. Alternatively, the groove cutting blade is placed in the blade accommodating groove, and the side driving member is continuously rotated. Since the center axis of the driving taper surface is parallel to the center axis of the clamping taper hole and is provided with a downward eccentricity E, the upper fastener is pulled downward until the groove cutting blade is clamped, i.e. the groove cutting blade is clamped from the side. The groove cutting blade can be replaced by loosening the side driving member. The structure is stable and reliable, and the clamping force is large enough. More importantly, the groove cutting blade can be clamped and replaced from the top surface or the side, which can meet the application requirements of the knife rack of the core drilling machine and expand the application range of the groove cutting tool. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a perspective view of the two-way driving and clamping groove cutting tool of the present application.

[0020] Figure 2 is a perspective view of the two-way driving and clamping groove cutting tool of the present application.

[0021] Figure 3 is a top view of the two-way driving and clamping groove cutting tool of the present application.

[0022] Figure 4 is Figure 3 A-A sectional view.

[0023] Figure 5 is Figure 3 A-A sectional view (only showing the tool body).

[0024] Figure 6 is a front view of the upper fastener of the two-way driving and clamping groove cutting tool of the present application.

[0025] Figure 7 is a front view of the lower clamping part of the two-way driving and clamping groove cutting tool of the present application.

[0026] Figure 8 is the front view of the side driving member of the bidirectional driving clamping slotting tool of the present application.

[0027] The reference signs in the drawings represent:

[0028] 1, tool body; 11, upper clamping part; 12, lower supporting part; 13, locking accommodating hole; 131, upper accommodating section; 132, limiting section; 133, lower accommodating section; 2, slotting blade; 3, blade accommodating groove; 4, upper fastener; 41, limiting head; 42, threaded section; 5, lower clamping member; 51, clamping taper hole; 52, internal threaded hole; 6, side driving member; 61, driving taper surface; 62, internal wrench hole; 7, elastic deformation groove. DETAILED DESCRIPTION

[0029] The present application will be further described in detail below in combination with the drawings and specific examples.

[0030] Figures 1 to 8An embodiment of the bidirectional driving clamping slotting tool of the present application is shown, which comprises a tool body 1 and a slotting blade 2, the tool body 1 is provided with a blade accommodating groove 3, the slotting blade 2 is installed in the blade accommodating groove 3, the slotting tool further comprises an upper fastener 4, a lower clamping part 5 and a side driving part 6, the tool body 1 is further provided with an elastic deformation groove 7 to divide the tool body 1 corresponding to the blade accommodating groove 3 into an upper clamping part 11 and a lower supporting part 12, the upper fastener 4 is installed on the upper clamping part 11 and is threadedly connected with the lower clamping part 5 installed on the lower supporting part 12, the lower clamping part 5 is provided with a clamping taper hole 51 on the side, the side driving part 6 is installed on the side of the tool body 1 and is provided with a driving taper surface 61 at the end to match the clamping taper hole 51, the center axis of the driving taper surface 61 is parallel to the center axis of the clamping taper hole 51 and is provided with a downward eccentricity E, which should satisfy: 0.2mm≤E≤0.5mm, during installation, the lower clamping part 5 is first installed on the tool body 1, and the rotation or falling of the lower clamping part 5 is limited by installing the side driving part 6 to match the lower clamping part 5, the upper fastener 4 is rotated to be threadedly connected with the lower clamping part 5, and the installation of the upper fastener 4, the lower clamping part 5 and the side driving part 6 is completed, after the slotting blade 2 is placed in the blade accommodating groove 3, the upper fastener 4 is continuously rotated until the slotting blade 2 is clamped, that is, the slotting blade 2 is clamped from the top surface, the upper fastener 4 is loosened to replace the slotting blade 2, or after the slotting blade 2 is placed in the blade accommodating groove 3, the side driving part 6 is continuously rotated, because the center axis of the driving taper surface 61 is parallel to the center axis of the clamping taper hole 51 and is provided with a downward eccentricity E, the upper fastener 4 is pulled downward until the slotting blade 2 is clamped, that is, the slotting blade 2 is clamped from the side, the side driving part 6 is loosened to replace the slotting blade 2, the structure is stable and reliable, and the clamping force is large enough, more importantly, the slotting blade 2 can be clamped and replaced from the top surface or the side, which can meet the application requirements of the gang tool holder of the slotting machine, and the application range of the slotting tool is expanded.

[0031] In the embodiment, the tool body 1 is provided with a locking accommodating hole 13 penetrating through the upper clamping part 11 and the lower supporting part 12, the locking accommodating hole 13 comprises an upper accommodating section 131, a limiting section 132 and a lower accommodating section 133 arranged in sequence, the inner diameter of the limiting section 132 is smaller than the inner wall diameters of the upper accommodating section 131 and the lower accommodating section 133, the upper fastener 4 comprises a limiting head 41 and a threaded part 42, the lower clamping part 5 is provided with an inner threaded hole 52, the limiting head 41 is placed in the upper accommodating section 131, the threaded part 42 is connected with the inner threaded hole 52 of the lower clamping part 5 placed in the lower accommodating section 133 through the limiting section 132, the structure is compact and stable and reliable.

[0032] In the embodiment, gaps L are arranged between the outer circumferential surface of the limiting head 41 and the inner wall of the upper accommodating section 131, between the threaded portion 42 and the inner wall of the limiting section 132, and between the outer circumferential surface of the lower clamping part 5 and the lower accommodating section 133, and should satisfy L≥0.2 mm, so that the upper fastener 4 and the lower clamping part 5 can move flexibly in the locking accommodating hole 13, and the clamping and loosening of the blade are ensured to be carried out smoothly. In the embodiment, the gap L between the outer circumferential surface of the limiting head 41 and the inner wall of the upper accommodating section 131 and the gap L between the outer circumferential surface of the lower clamping part 5 and the lower accommodating section 133 are 0.25 mm, and the gap L between the threaded portion 42 and the inner wall of the limiting section 132 is 0.5 mm. In the embodiment, the upper fastener 4 and the lower clamping part 5 are coaxial and the axis is perpendicular to the central axis of the side driving part 6.

[0033] In the embodiment, two clamping taper holes 51 are arranged in the side part of the lower clamping part 5, and the side driving part 6 is correspondingly provided with two parts and is arranged on both sides of the blade body 1, so that the pressing of the slotting blade 2 is more reliable.

[0034] In the embodiment, the taper angle of the driving taper surface 61 is α, the taper angle of the clamping taper hole 51 is β, and should satisfy α=β, 20°≤α≤60°, and 20°≤β≤60°. In the embodiment, α=β=30°.

[0035] In the embodiment, the side driving part 6 is threadedly connected with the blade body 1 through the outer thread arranged on the outer circumferential surface.

[0036] In the embodiment, the distance between the limiting surface of the upper accommodating section 131 and the elastic deformation groove 7 is L1, and the distance between the limiting surface of the lower accommodating section 133 and the elastic deformation groove 7 is L2, and should satisfy L1≥2 mm and L2≥2 mm, so that the blade limiting section 132 has sufficient strength and rigidity, and deformation is avoided when the slotting blade 2 is clamped by the action force of the upper fastener 4 and the lower clamping part 5. In the embodiment, L1=2.8 mm and L2=3.2 mm.

[0037] In the embodiment, an inner wrench hole 62 is arranged on the outer end surface of the side driving part 6, so as to facilitate installation and loosening operation.

[0038] In the embodiment, up and down, inside and outside, and the like are based on the state of the normal placement of the slotting tool, and each parameter is based on the state of the installation of the slotting blade 2.

[0039] Although the present application has been disclosed with reference to the preferred embodiments, it is not intended to limit the present application. Any person skilled in the art, without departing from the technical scope of the present application, can make many possible changes and modifications to the disclosed technical content of the present application, or modify equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments without departing from the technical content of the present application, according to the technical essence of the present application, shall fall within the scope of protection of the present application.

Claims

1. A bidirectional drive clamping grooving tool, comprising a tool body (1) and a grooving blade (2), wherein the tool body (1) has a blade receiving groove (3), and the grooving blade (2) is installed in the blade receiving groove (3), characterized in that: The grooving tool also includes an upper fastener (4), a lower locking member (5), and a side drive member (6). The tool body (1) is also provided with an elastic deformation groove (7) to divide the tool body (1) into an upper clamping part (11) and a lower support part (12) corresponding to the blade receiving groove (3). The upper fastener (4) is installed on the upper clamping part (11) and threadedly connected to the lower locking member (5) installed on the lower support part (12). The lower locking member (5) has a locking cone hole (51) on its side. The side drive member (6) is installed on the side of the tool body (1) and has a driving cone surface (61) at its end that mates with the locking cone hole (51). The central axis of the driving cone surface (61) is parallel to the central axis of the locking cone hole (51) and has a downward eccentricity E, which should satisfy: 0.2mm≤E ≤0.5mm, the blade body (1) is provided with a locking receiving hole (13) that passes through the upper clamping part (11) and the lower support part (12). The locking receiving hole (13) includes an upper receiving section (131), a limiting section (132) and a lower receiving section (133) arranged in sequence. The inner diameter of the limiting section (132) is smaller than the inner diameter of the upper receiving section (131) and the lower receiving section (133). The upper fastener (4) includes a limiting head (41) and a threaded part (42). The lower locking member (5) is provided with an internal threaded hole (52). The limiting head (41) is placed in the upper receiving section (131). The threaded part (42) passes through the limiting section (132) and connects to the internal threaded hole (52) of the lower locking member (5) placed in the lower receiving section (133).

2. The bidirectional drive clamping grooving tool according to claim 1, characterized in that: The outer circumferential surface of the limiting head (41) and the inner wall of the upper receiving section (131), the threaded part (42) and the inner wall of the limiting section (132), and the outer circumferential surface of the lower locking part (5) and the lower receiving section (133) are all provided with a gap L, which should satisfy: L≥0.2mm.

3. The bidirectional drive clamping grooving tool according to claim 1 or 2, characterized in that: The upper fastener (4) and the lower locking member (5) are coaxial and their axes are perpendicular to the central axis of the side drive member (6).

4. The bidirectional drive clamping grooving tool according to claim 1 or 2, characterized in that: The lower locking member (5) has two locking cone holes (51) on its side, and the side driving member (6) is set to two respectively and located on both sides of the blade body (1).

5. The bidirectional drive clamping grooving tool according to claim 4, characterized in that: The cone angle of the driving cone surface (61) is α, and the cone angle of the positioning cone hole (51) is β. They should satisfy: α=β, 20°≤α≤60°, 20°≤β≤60°.

6. The bidirectional drive clamping grooving tool according to claim 1 or 2, characterized in that: The side drive component (6) is threadedly connected to the cutter body (1) through an external thread provided on the outer circumferential surface.

7. The bidirectional drive clamping grooving tool according to claim 1 or 2, characterized in that: The distance between the limiting surface of the upper receiving section (131) and the elastic deformation groove (7) is L1, and the distance between the limiting surface of the lower receiving section (133) and the elastic deformation groove (7) is L2. The following conditions should be met: L1≥2mm, L2≥2mm.

8. The bidirectional drive clamping grooving tool according to claim 6, characterized in that: The side drive component (6) has an inner wrench hole (62) on its outer end face.

Images