A combined coated alloy end mill
By designing a detachable combined coated alloy end mill, the coaxial and circumferential positioning of the tool head and the tool holder is achieved by combining the tapered surface and the end surface, the problem of the entire tool body being invalidated after damage is solved, and the multiple use of the tool holder and the production cost are reduced.
Patent Information
- Application Number
- CN202323422631.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-15
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2033-12-15
AI Technical Summary
Once the existing end mills collapse or the cutting edge is damaged on a large scale during the processing process, the entire tool body will be completely invalid, resulting in waste and increased production costs.
A combined coated alloy end mill is designed, and the cutting head and the cutting handle are arranged in a detachable structure, which achieves coaxial positioning and circumferential positioning through the coordination of the tapered surface and the end surface, and is tightened by screw tension to achieve an integrated connection between the cutting head and the cutting handle.
When the cutting head is damaged during processing, the cutting head can be removed from the cutting head. Just replace the cutting head, avoiding the complete invalidation of the entire knife, realizing multiple recycling of the cutting head, and reducing tool and processing production costs.
Smart Images
Figure CN222696100U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of machining tools, in particular to a combined coated alloy end milling cutter. Background Art
[0002] Existing end mills are mainly of two types: integrated type and replaceable blade type. The replaceable blade type mainly arranges and installs multiple blades at the end of the cutter head. After wear, only the corresponding blade needs to be replaced. The integrated type mainly sets the cutter head and the handle as a whole, and sets the cutting edge at the end of the cutter head. Most of the existing milling cutters are coated milling cutters with spiral blades. Once the cutter is broken or the cutting edge is damaged in a large range during the processing, the entire cutter body is completely scrapped, especially for cutters with larger dimensions, the handle is also directly scrapped, causing waste and increasing production costs. In view of this, a combined coated alloy end mill is proposed. Summary of the invention
[0003] The utility model proposes the following technical solutions to solve the problems in the background technology:
[0004] A combined coated alloy end mill is provided, comprising a shank and a cutter head, wherein a tapered hole is provided at the front end of the shank, a connecting plane is provided on the side wall of the tapered hole, a top pressure surface is formed at the front end of the shank, and a center hole penetrating through both ends of the shank is provided axially of the shank.
[0005] A frustum is arranged at the rear end of the cutter head, and a plane end is formed on the side wall of the frustum. A screw hole is opened at the rear end of the frustum, and a plane end perpendicular to the axial direction of the frustum is formed at the rear end of the cutter head.
[0006] The frustum is fitted in the tapered hole, the planar end is fitted in the connecting plane, and the top pressure surface abuts against the axial end surface, wherein the axial end surface is located at the outermost edge of the rear end of the cutter head; and a screw is also included, the front end of which passes through the center hole and is screwed to the screw hole to achieve fixed installation of the tool handle and the cutter head.
[0007] Preferably, a placement groove is provided at the rear end of the tool handle, and the nut at the rear end of the screw rod can be placed in the placement groove.
[0008] Preferably, the tool handle is a Morse taper handle, and a bayonet is provided at a side end of the taper handle.
[0009] Preferably, a gap is provided between the end of the frustum and the conical hole.
[0010] Preferably, a boss is provided on the inner side of the axial end surface, the frustum is provided on the boss, and an angle groove is provided at the intersection of the axial end surface and the boss.
[0011] The beneficial effect of the utility model is that the tool head and tool handle of the coated alloy end mill are arranged into a detachable structure, and the tool head and the tool handle are coaxially positioned by conical surface cooperation, and the swing of the tool head relative to the tool handle can be limited by end surface cooperation, and the two are fastened by screw pulling force, so that the tool head and the tool handle are connected as a whole with a certain strength, and when the tool head is chipped or the cutting edge is damaged on a large scale during processing, the tool handle and the tool head can be disassembled and only the tool head can be replaced, thus avoiding the complete scrapping of the entire tool, realizing the repeated recycling of the tool handle, reducing the production cost of the tool, and also reducing the processing production cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the milling cutter provided in the embodiment of the utility model;
[0014] Figure 2 yes Figure 1 Schematic diagram of the decomposition structure;
[0015] Figure 3 It is a schematic diagram of the main structure of the milling cutter provided by the embodiment of the utility model;
[0016] Figure 4 yes Figure 3 Schematic diagram of the full cross-section structure;
[0017] Figure 5 It is a structural schematic diagram of the knife handle and the knife head mounting end provided by the embodiment of the utility model;
[0018] In the figure: 1-tool handle, 1.1-conical hole, 1.2-center hole, 1.3-placing groove, 1.4-top pressure surface, 1.5-connecting plane, 2-tool head, 2.1-cone, 2.2-plane end, 2.3-screw hole, 2.4-axial end face, 2.5-angle groove, 3-screw. DETAILED DESCRIPTION
[0019] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the utility model rather than to limit the scope of the utility model. The implementation conditions used in the examples can be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are usually the conditions in conventional experiments.
[0020] In a specific embodiment, a combined coated alloy end mill is provided, comprising a tool handle 1 and a tool head 2 arranged at the front end of the tool handle 1. In this example, in order to realize the detachable installation of the tool head and the tool handle, the structure of the connecting end of the tool handle and the tool head is mainly improved. The specific improved structure is as follows:
[0021] Handle part: A tapered hole 1.1 is provided at the front end of the handle 1, and a connecting plane 1.5 is provided on the side wall of the tapered hole 1.1, and a top pressure surface 1.4 is formed at the front end of the handle 1. In addition, a center hole 1.2 is axially provided in the handle 1 and passes through both ends of the handle 1.
[0022] The cutter head part: First, the cutter head is provided with a coating alloy cutting edge as in the prior art. In order to achieve the match with the end of the handle 1, a cone 2.1 is provided at the rear end of the cutter head 2, and a plane end 2.2 is formed on the side wall of the cone 2.1, and a screw hole 2.3 is opened at the rear end of the cone 2.1. A plane end 2.2 is formed at the rear end of the cutter head 2 and is perpendicular to the axial direction of the cone 2.1;
[0023] In the installed state, the cone 2.1 is installed in the tapered hole 1.1, and the flat end 2.2 is matched with the connecting plane 1.5, so that the coaxial positioning of the tool handle and the tool head can be achieved through the matching of the tapered surface, and the circumferential positioning of the two can be achieved through the matching of the flat end 2.2 and the connecting plane 1.5, so that the torque can be transmitted. When the above-mentioned matching ends are matched, the top pressure surface 1.4 abuts against the axial end surface 2.4, and the swing of the tool head is limited by the end surface matching. In order to achieve the fixation of the tool handle and the tool head, this example also includes a screw 3. When the tool handle and the tool head are fixed, the front end of the screw 3 passes through the center hole 1.2 and the screw hole 2.3 of the tool head to achieve the above-mentioned tight fit and compaction of the matching surface, thereby achieving the fixed installation of the tool handle 1 and the tool head 2. In order to further avoid interference between the matching of the tapered surface and the end surface, a gap is set between the end of the cone 2.1 and the tapered hole 1.1, so that the rear end surface of the tapered surface can also be accurately matched at the same time.
[0024] When the cutter head breaks or the cutting edge is extensively damaged during processing, the tool holder and cutter head can be disassembled and only the cutter head needs to be replaced. This avoids the entire tool being completely scrapped and enables the tool holder to be recycled multiple times, reducing the tool production cost and the processing cost.
[0025] Combined with the above tool structure, in order to avoid the nut at the rear end of the screw rod 3 occupying the position of the rear end of the tool handle, causing installation difficulties, a placement groove 1.3 is set at the rear end of the tool handle 1. After installation, the nut at the rear end of the screw rod 3 can be placed in the placement groove 1.3, effectively reducing the length of the tool handle, which is particularly suitable for tapered tool handles. Pull pins for fixing the tool can also be installed in the placement groove 1.3, and the tool can be fixed through the hydraulic tool clamping structure of the machine tool. Therefore, the tool handle 1 of the present application is a Morse taper handle, and in order to realize the transmission of cutting rotation force, a bayonet is set at the side end of the taper handle as in the prior art, and the clamping block on the machine tool spindle can cooperate with the bayonet to realize the transmission of cutting force.
[0026] In addition, in order to achieve that the axial end face 2.4 can better limit the swing of the cutter head and increase the restraining force, it is preferred to set the axial end face 2.4 at the outermost edge of the rear end of the cutter head 2, which can increase the restraining force arm. On this basis, a boss is set on the inner side of the axial end face 2.4, and the frustum 2.1 is set on the boss. After installation, the handle end can be wrapped around the outer periphery of the cutter head end, which can prevent the edge of the connecting surface between the frustum 2.1 and the conical hole 1.1 from being exposed to impurities. In addition, in order to prevent dust and impurities from accumulating on the axial end face 2.4 and the corners to affect the fit, a corner groove 2.5 is opened at the intersection of the axial end face 2.4 and the boss, and tiny impurities can enter the corner groove 2.5.
[0027] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the invention through the above description. The technical scope of the invention is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A combined coated alloy end mill, comprising a shank (1) and a cutter head (2), characterized in that: A tapered hole (1.1) is provided at the front end of the knife handle (1), and a connecting plane (1.5) is provided on a side wall of the tapered hole (1.1); a top pressure surface (1.4) is formed at the front end of the knife handle (1), and a center hole (1.2) is provided axially on the knife handle (1) and passes through both ends of the knife handle (1); A frustum (2.1) is provided at the rear end of the cutter head (2), a plane end (2.2) is formed on the side wall of the frustum (2.1), a screw hole (2.3) is provided at the rear end of the frustum (2.1), and a plane end (2.2) perpendicular to the axial direction of the frustum (2.1) is formed at the rear end of the cutter head (2); The frustum (2.1) is mounted in the conical hole (1.1), the plane end (2.2) is mounted in cooperation with the connecting plane (1.5), and the top pressure surface (1.4) abuts against the axial end surface (2.4), wherein the axial end surface (2.4) is located at the outermost edge of the rear end of the cutter head (2); and further comprising a screw rod (3), the front end of which passes through the center hole (1.2) and is screwed to the screw hole (2.3), thereby achieving fixed installation of the tool handle (1) and the cutter head (2).
2. A combined coated alloy end mill as claimed in claim 1, characterized in that: A placement groove (1.3) is provided at the rear end of the knife handle (1), and a nut at the rear end of the screw rod (3) can be placed in the placement groove (1.3).
3. A combined coated alloy end mill as claimed in claim 2, characterized in that: The tool handle (1) is a Morse taper handle, and a bayonet is provided at the side end of the taper handle.
4. A combined coated alloy end mill as claimed in claim 1, characterized in that: A gap is provided between the end of the frustum (2.1) and the conical hole (1.1).
5. The combined coated alloy end mill as claimed in claim 1, characterized in that: A boss is arranged on the inner side of the axial end surface (2.4), the frustum (2.1) is arranged on the boss, and an angle groove (2.5) is provided at the intersection of the axial end surface (2.4) and the boss.