Quick assembling and disassembling tool for grinding angle milling cutter of universal tool grinding machine

Abstract

The utility model provides a quick assembling and disassembling tool for a universal tool grinding machine to grind an angle milling cutter. The quick assembling and disassembling tool comprises a taper shank mandrel and an expansion screw, a Morse taper shank is arranged at the rear end of the taper shank mandrel body; the front end of the expandable mandrel is provided with a sleeve body structure; the expandable mandrel sleeve body is provided with an inner taper hole and an inner thread; the angle milling cutter is sleeved on the expandable mandrel; the external thread of the expansion screw is screwed with the internal thread of the taper shank mandrel; after the inner taper hole is expanded by the outer cone body of the expansion screw, the angle milling cutter is coaxially and fixedly sleeved on the shaft body of the expandable mandrel; and the expansion screw is provided with a countersunk multi-square hole, is not exposed and is contained in the inner hole of the angle milling cutter. According to the utility model, the angle milling cutter can be quickly clamped and disassembled, the clamping efficiency is improved, and the clamping coaxiality is ensured; clamping of milling cutters with different sizes and angles is met; and the clamped tool does not interfere with the to-be-machined surface of the angle milling cutter, so that the grinding defect is avoided, and universal and efficient clamping is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of operating and transporting grinding machine tool supporting components, and in particular relates to a fast loading and unloading tool used for grinding angle milling cutters on a universal tool grinder. Background Art

[0002] like Figure 1 The angle milling cutter 1 shown is mainly used for milling grooves and inclined surfaces. After the angle milling cutter 1 is worn out after a period of use, it is necessary to use a universal tool grinder to grind the tooth back grinding surface 101 of the two side edges of the angle milling cutter 1 with the aid of a grinding wheel 2.

[0003] In the prior art, when the angle milling cutter 1 is clamped on the universal tool grinder, the following method is used: Figure 2 The clamping fixture shown. The fixture consists of a Morse taper shank spindle 3 and a clamping nut 4. The clamping nut 4 is screwed into the external thread of the Morse taper shank spindle 3 to clamp the angle milling cutter 1 between the front end of the Morse taper shank spindle 3 and the clamping nut 4, thereby completing the clamping of the angle milling cutter 1.

[0004] The disadvantages of this clamping method are: (i) interference occurs between the grinding wheel 2 used for grinding on the universal tool grinder and the exposed clamping nut 4, resulting in defects such as increased runout and incomplete end tooth grinding of the angle milling cutter 1 after grinding; (ii) the coaxiality between the inner hole 102 of the angle milling cutter 1 and the Morse taper shank spindle 3 cannot be guaranteed, and there is a gap when the angle milling cutter 1 is clamped on the tooling. Therefore, it is necessary to make multiple Morse taper shank spindles 3 of different sizes to match the inner holes 102 of the angle milling cutter 1 of different sizes, which leads to an increase in the number of tooling used for clamping and an increase in tooling costs. Therefore, it is inconvenient to quickly clamp angle milling cutters 1 of different sizes on the tooling. In this regard, the following improved technical scheme is proposed. Utility Model Content

[0005] The technical problem solved by the utility model is to provide a quick loading and unloading tool for grinding angle milling cutters on a universal tool grinder, so as to solve the technical problems of interference between the tool and the grinding wheel after the angle milling cutter is clamped, large clamping jump, and inconvenience in quick loading and unloading.

[0006] The utility model adopts the following technical scheme: a quick-loading and disassembly tool for grinding angle milling cutters on a universal tool grinder, comprising a tapered shank spindle and a tightening screw; the rear end of the tapered shank spindle shaft body has a Morse tapered shank; the front end of the tapered shank spindle shaft body is provided with an expandable spindle; the expandable spindle is a sleeve structure, and the sleeve of the expandable spindle is provided with an inner tapered hole; the sleeve body where the inner tapered hole is located is provided with a plurality of axial expansion joints evenly distributed radially; the inner side wall of the sleeve body of the expandable spindle is provided with an inner thread; after the angle milling cutter is sleeved on the outer side of the expandable spindle, the outer thread provided at the front end of the tightening screw is screwed to fit the inner thread of the tapered shank spindle; at the same time, the outer cone provided at the rear end of the tightening screw expands the inner tapered hole provided on the expandable spindle, so that the angle milling cutter is coaxially fixedly sleeved on the expandable spindle shaft body; at the same time, the center of the tightening screw head is provided with a countersunk multi-square hole, the tightening screw is not exposed and is completely inserted into the inner hole of the angle milling cutter.

[0007] In the above technical scheme, as a further improvement of the utility model: a convex pillow block is formed in the middle of the tapered shank mandrel, that is, between the Morse taper shank and the expandable mandrel; the pillow block is used for axial limiting of the angle milling cutter.

[0008] In the above technical solution, as a further improvement of the utility model: the expandable mandrel set is adapted to install an adjusting washer; the adjusting washer axially limits the angle milling cutter through the pillow block.

[0009] Among the above technical solutions, as the preferred technical solution of the utility model: there are multiple adjusting washers, and the thicknesses of the multiple adjusting washers are different.

[0010] Among the above technical solutions, as the preferred technical solution of the utility model: the countersunk multi-square hole is a hexagonal hole.

[0011] Among the above technical solutions, as the preferred technical solution of the utility model: six expansion joints are evenly distributed along the radial direction of the inner tapered hole.

[0012] The advantages of this utility model compared with the prior art:

[0013] 1. The utility model is used for grinding angle milling cutters on universal tool grinders, which can realize rapid clamping and disassembly of angle milling cutters, improve clamping efficiency, and ensure clamping coaxiality.

[0014] 2. The utility model can meet the clamping requirements of angle milling cutters of different sizes; and the fixture after clamping does not interfere with the surface to be processed by the angle milling cutter, thereby avoiding the generation of grinding defects and achieving universal clamping.

[0015] 3. The adjusting washer of the utility model is used to adapt to the defect of different thickness of the angle milling cutter, so as to realize the universal positioning, adaption and clamping of the angle milling cutter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a schematic diagram of the structure of the angle milling cutter to be sharpened in the utility model;

[0017] Figure 2 It is a schematic diagram of a clamping fixture structure for clamping an angle milling cutter on a universal tool grinder under the prior art;

[0018] Figure 3 It is a schematic diagram of the exploded structure of the best embodiment of the utility model for the quick loading and unloading tooling for grinding angle milling cutters on a universal tool grinder;

[0019] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of the tapered shank mandrel;

[0020] Figure 5 for Figure 3 The enlarged structural diagram of the expansion screw in FIG.

[0021] Figure 6 for Figure 3 A schematic diagram of the structure of the best embodiment of the utility model of quick loading and unloading tooling after assembly;

[0022] Figure 7 It is a relative position diagram of the method of using the utility model;

[0023] In the figure: 1-angle milling cutter, 101-tooth back surface to be ground, 102-inner hole, 103-end tooth edge; 2-grinding wheel, 201-grinding point of grinding wheel; 3-Morse taper shank spindle, 4-pressing nut, 5-taper shank spindle, 5-1 Morse taper shank, 5-2 pillow block, 5-3 expandable spindle, 5-301 inner tapered hole, 5-302 expansion joint; 6-expansion screw, 6-1 countersunk multi-square hole, 6-2 outer cone, 6-3 outer thread, 7-adjusting washer, 8-elastic support mechanism, 9-machine tool guide surface. DETAILED DESCRIPTION

[0024] The following will be combined with the attached embodiment of the utility model Figure 3-7 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] A quick-loading and disassembly tool for grinding an angle milling cutter on a universal tool grinder comprises a tapered shank mandrel 5 and a tightening screw 6. That is, the tool of the utility model can realize the quick clamping of the angle milling cutter 1 by using at least two components.

[0026] Preferably: (such as Figure 4As shown in the figure, the rear end of the taper shank mandrel 5 has a Morse taper shank 5-1; the Morse taper shank 5-1 is used when the tool is used to grind the angle milling cutter 1 on a universal tool grinder. Specifically, the Morse taper shank 5-1 is used to be clamped on a special base of the universal tool grinder, which is different from the prior art as shown in the figure. Figure 2 The clamping fixture shown is clamped in the same way on the universal tool grinder.

[0027] Compared with existing technologies such as Figure 2 The clamping fixture structures shown are different: (such as Figure 3 , Figure 6 As shown in the figure, the front end of the cone shank mandrel 5 is provided with an expandable mandrel 5-3; in particular, the expandable mandrel 5-3 is a sleeve structure, and the sleeve of the expandable mandrel 5-3 is provided with an inner tapered hole 5-301; the sleeve where the inner tapered hole 5-301 is located is provided with a plurality of axial expansion joints 5-302 evenly distributed in the radial direction. The inner tapered hole 5-301 is used for universal clamping and adaptation between the cone shank mandrel 5 and the inner hole 102 of different types of angle milling cutters 1.

[0028] In the above embodiment, as the preferred technical solution of the utility model: the expansion joints 5-302 are evenly distributed along the radial direction of the inner tapered hole 5-301 to form six expansion joints 5-302.

[0029] It should be noted that: the expandable core shaft 5-3 is an expansion sleeve with an inner tapered hole 5-301 structure in the sleeve system, and its principle and purpose is to achieve a keyless coaxial connection between the angle milling cutter 1 and the expandable core shaft 5-3 through taper matching and expansion force. In addition, the preferred arrangement of six expansion joints has the following advantages: the six expansion joints 5-302 can evenly distribute the expansion force, making the contact pressure of the expansion sleeve more uniform, and avoiding local wear or damage of the expansion sleeve caused by pressure concentration. Multiple expansion joints 5-302 can increase the expansion force of the expansion sleeve and make the connection tighter. The six expansion joints 5-302 can adapt to the inner holes 102 of the angle milling cutters 1 of different sizes, making the expansion sleeve more versatile and flexible. The design of the six expansion joints 5-302 can reduce the stress concentration of the expansion sleeve during operation, reduce the risk of fatigue damage of the expansion sleeve, and thus extend the service life of the expansion sleeve.

[0030] The inner wall of the sleeve of the expandable mandrel 5-3 is formed with an internal thread; the internal thread is used to screw in a suitable manner to fit the expansion screw 6 described later, and by continuously screwing in the expansion screw 6, through the taper matching between the outer cone 6-2 of the expansion screw 6 and the inner tapered hole 5-301 and the expansion force, a keyless coaxial connection between the angle milling cutter 1 and the expandable mandrel 5-3 is achieved.

[0031] That is, after the angle milling cutter 1 is loosely fitted on the outside of the expandable mandrel 5-3, in order to achieve a tight fit: (combined Figure 3 , Figure 4, Figure 5 (as shown) the external thread 6-3 formed on the front end of the tightening screw 6 is screwed to fit the internal thread of the tapered shank core shaft 5; at the same time, the external cone 6-2 formed on the rear end of the tightening screw 6 expands the internal tapered hole 5-301 formed on the expandable core shaft 5-3, so that the angle milling cutter 1 fits tightly and is coaxially fixed on the shaft body of the expandable core shaft 5-3.

[0032] Therefore, the problem of universal coaxial fixed connection between the inner hole 102 of the angle milling cutter 1 of different sizes and the expandable mandrel 5-3 is effectively solved. The angle milling cutter 1 is efficiently, simply and quickly assembled and connected on the expandable mandrel 5-3, thereby reducing the manufacturing cost of the tapered shank mandrel 5 and bringing practical economic benefits to the enterprise.

[0033] At the same time, in order to solve the technical problem of interference between the tooling and the grinding wheel 2: a countersunk multi-square hole 6-1 is formed in the center of the head of the tightening screw 6; the countersunk multi-square hole 6-1 is used to use a wrench to rotate and install the tightening screw 6.

[0034] Similarly, in order to solve the technical problem of interference between the tooling and the grinding wheel 2: after the expansion screw 6 is fully assembled, the expansion screw 6 is not exposed and the head of the expansion screw 6 is completely inserted into the inner hole 102 of the angle milling cutter 1 (such as Figure 6 shown).

[0035] In the above embodiment, as the preferred technical solution of the utility model: the countersunk multi-square hole 6-1 is a hexagonal hole. The advantage of the preferred hexagonal hole is that the concave shape of the hexagonal hole can be better embedded in the expansion screw 6, increasing the friction, so that the wrench or screwdriver is not easy to slip out. Since the hexagonal hole has six corners, it can bite well, has better torque transmission performance, and can withstand greater torque. When loosening or tightening, the wrench is not easy to slip out. The hexagonal expansion screw 6 allows the entire countersunk multi-square hole 6-1 to sink into the inner surface of the screw, so the smoothness, aesthetics and non-interference of the surface of the expansion screw 6 can be maintained.

[0036] (Combined Figure 4 As shown in the above embodiment, as a further improvement of the utility model: a convex pillow block 5-2 is formed in the middle of the tapered shank mandrel 5, that is, between the Morse taper shank 5-1 and the expandable mandrel 5-3; the pillow block 5-2 is an integrally formed structure with the tapered shank mandrel 5. The pillow block 5-2 is used for axial limiting of the angle milling cutter 1, that is, the assembly difficulty of the angle milling cutter 1 is further reduced, and the expansion and positioning function of the angle milling cutter 1 on the tapered shank mandrel 5 is fully utilized.

[0037] In the above embodiment, as a further improvement of the utility model: the expandable mandrel 5-3 is fitted with an adjustment washer 7; the adjustment washer 7 axially limits the angle milling cutter 1 through the pillow block 5-2, that is, the axial limit requirement of the angle milling cutter 1 with insufficient thickness passing through the pillow block 5-2 is met.

[0038] In the above embodiment, as the preferred technical solution of the utility model: the adjusting washers 7 are multiple, and the thicknesses of the multiple adjusting washers 7 are different. Specifically, the adjusting washers 7 have two thicknesses, one is 2 mm and the other is 5 mm. The adjusting washers 7 are used to adjust the defect of inconsistent thickness of the angle milling cutter 1.

[0039] The working principle of the utility model is as follows: the Morse taper shank 5-1 is used to be clamped on a special base of a universal tool grinder; the angle milling cutter 1 is used to be pre-mounted on the outer circle of the expandable mandrel 5-3 of the taper shank mandrel 5; the outer circle of the expandable mandrel 5-3 of the taper shank mandrel 5 is used to radially position the inner hole 102 of the angle milling cutter 1; the pillow block 5-2 of the taper shank mandrel 5 plays an axial positioning role for the angle milling cutter 1; the inner tapered hole 5-301 of the expandable mandrel 5-3 of the taper shank mandrel 5 is used as a tightening carrier to expand the outer circle of the expandable mandrel 5-3, thereby tightening the inner hole 102 of the angle milling cutter 1. The expansion screw 6 is moved with the countersunk multi-square hole 6-1 by using an inner hexagonal wrench, so that the outer cone 6-2 of the expansion screw 6 is screwed into the inner cone hole 5-3 of the expandable mandrel, and the outer thread 6-3 of the expansion screw 6 and the inner thread of the expandable mandrel 5-3 slide axially, so that the outer cone 6-2 of the expansion screw 6 and the inner cone hole 5-301 of the expandable mandrel 5-3 are axially frictionally displaced, so that the outer circle of the expandable mandrel 5-3 is expanded, so that the inner hole 102 of the angle milling cutter 1 is coaxially fixedly connected at the front end of the expandable mandrel 5-3. In addition, the adjustment washer 7 is used to adjust the defect of the angle milling cutter 1 having different thicknesses.

[0040] From the above description, it can be found that: the utility model drives the outer cone 6-2 and the inner tapered hole 5-301 of the tapered shank core shaft 5 to slide axially by screwing in or out the external thread 6-3 of the tightening screw 6, so that the outer circle of the expandable core shaft 5-3 expands or rebounds, fixes or withdraws the inner hole 102 of the angle milling cutter 1, and realizes the rapid and precise clamping or loosening of the tooling for the angle milling cutter 1; and the assembled tooling can be installed in the special base tapered hole of the universal tool grinder through the Morse taper shank 5-1, so that the grinding wheel 2 can perform interference-free grinding of the angle milling cutter 1.

[0041] It should be noted that: (such as Figure 7(As shown in the figure) the machine guide surface 9 of the universal tool grinder is equipped with an elastic support mechanism 8, and the elastic support mechanism 8 is fixed relative to the machine guide surface 9 of the universal tool grinder; the elastic support mechanism 8 will move as the machine guide surface 9 moves left and right. The elastic support mechanism 8 is supported on the front surface of the angle milling cutter 1, and the cutting edge of the tooth back surface to be ground 101 of the angle milling cutter 1 is made parallel to the direction of the machine guide surface 9 by adjusting the angle of the turntable on the special base of the universal tool grinder. By adjusting the relative position of the grinding point 201 of the grinding wheel 2 and the tooth back surface to be ground 101 of the angle milling cutter 1 and adjusting the angle of the turntable, the angle milling cutter 1 can be ground by operating according to the existing indexing and grinding technology. It should be noted that during grinding, the tooth tip of the angle milling cutter 1 opposite to the grinding wheel 2 will not be interfered with, so as to ensure complete grinding.

[0042] Therefore, the utility model is used when grinding the angle milling cutter 1 on a universal tool grinder, and can realize the rapid clamping and disassembly of the angle milling cutter 1, improve the clamping efficiency, and ensure the clamping coaxiality. Furthermore, the utility model can meet the clamping requirements of angle milling cutters 1 of different sizes; and the tooling after clamping does not interfere with the surface to be processed of the angle milling cutter 1, avoiding the generation of grinding defects and realizing the universality of clamping. Furthermore, the adjustment washer 7 of the utility model is used to adapt to the defect of different thickness of the angle milling cutter 1, realizing the universal positioning and adaption clamping of the angle milling cutter 1.

[0043] To sum up, the expandable tapered shank core shaft 5 of the utility model realizes the rapid positioning, clamping and disassembly of the angle milling cutter 2 on the tooling by positioning the inner hole 102 of the angle milling cutter 1 and the expansion or contraction of the expandable core shaft 5-3; after clamping, the tooling is not exposed on the end face to be processed of the angle milling cutter 1, so there is no interference between the tooling and the grinding wheel 2, and it does not affect the end edge grinding of the angle milling cutter 1 by the grinding wheel 2, thereby achieving the purpose of accurate positioning, rapid loading and unloading and complete grinding of the end teeth of the angle milling cutter 1.

[0044] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A quick-loading and unloading tool for grinding angle milling cutters on a universal tool grinder, characterized in that: The invention comprises a tapered shank mandrel (5) and a tightening screw (6); the rear end of the tapered shank mandrel (5) has a Morse tapered shank (5-1); the front end of the tapered shank mandrel (5) is provided with an expandable mandrel (5-3); the expandable mandrel (5-3) is a sleeve structure, and the sleeve of the expandable mandrel (5-3) is provided with an inner tapered hole (5-301); the sleeve where the inner tapered hole (5-301) is located is provided with a plurality of axial expansion joints (5-302) evenly distributed in the radial direction; the inner side wall of the sleeve of the expandable mandrel (5-3) is provided with an internal thread; and an angle milling cutter (1) is sleeved on the expandable mandrel. After the expansion screw (6) is inserted into the outside of the expansion screw (5-3), the external thread (6-3) formed at the front end is screwed to match the internal thread of the tapered shank core shaft (5); after the external cone (6-2) formed at the rear end of the expansion screw (6) expands the internal tapered hole (5-301) formed on the expandable core shaft (5-3), the angle milling cutter (1) is coaxially fixedly sleeved on the shaft body of the expandable core shaft (5-3); a countersunk multi-square hole (6-1) is formed in the center of the head of the expansion screw (6); the expansion screw (6) is not exposed and is inserted into the inner hole (102) of the angle milling cutter (1).

2. The tooling according to claim 1, characterized in that: An outwardly protruding pillow block (5-2) is provided in the middle of the tapered shank spindle (5), namely between the Morse tapered shank (5-1) and the expandable spindle (5-3); the pillow block (5-2) is used for axial limiting of the angle milling cutter (1).

3. The tooling according to claim 2, characterized in that: The expandable core shaft (5-3) is fitted with an adjustment washer (7); the adjustment washer (7) axially limits the angle milling cutter (1) through the pillow block (5-2).

4. The tooling according to claim 3, characterized in that: The adjusting washers (7) are multiple and the thicknesses of the multiple adjusting washers (7) are different.

5. The tooling according to claim 1, characterized in that: The countersunk multi-square hole (6-1) is a hexagonal hole.

6. The tooling according to claim 1, characterized in that: The expansion joints (5-302) are evenly distributed along the radial direction of the inner tapered hole (5-301) to form six expansion joints (5-302).

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