A multi-stage ladder deep groove cutting tool

Abstract

The present application relates to the technical field of cutters, in particular to a multi-stage ladder deep groove cutting tool, which is a cutting tool for multi-stage ladder groove cutting installed on a machine tool. The multi-stage ladder deep groove cutting tool comprises a tool handle and a tool plate; one end of the tool handle is provided with a support part; the tool handle is arranged on one side of the end face of the support part, and opposite sides of the support part are provided with positioning keys; the positioning key arranged on one side of the support part is connected with the tool handle; the tool plate is provided with multi-stage ladder grooves, and the adjacent ladder groove junctions are provided with chamfers. The multi-stage ladder deep groove cutting tool is designed with an asymmetric support structure on the tool handle, and the ladder groove profile of the ladder deep groove cutter is processed with excessive chamfering, which enhances the rigidity of the tool plate. The rigidity of the tool plate makes the cutting more stable, and ensures the machining quality of the workpiece surface.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cutters, in particular to a multi-stage ladder deep groove cutting cutter, which is installed on a machine tool and used for cutting multi-stage ladder deep grooves. BACKGROUND

[0002] The most difficult thing in processing ladder deep grooves is poor cutter strength, and the tool setting phenomenon is very serious in processing. The processed ladder deep grooves often have a taper, and the deeper and narrower the groove, the more serious the tool setting phenomenon when detected by using a sample plate. The taper formed by the deep groove does not meet the drawing requirements, and the product cannot be assembled, which affects the subsequent process.

[0003] The currently used cutter adopts a straight groove cutting cutter, and the cutter strength is acceptable when directly cutting a wide groove, but the cutter plate strength becomes weak when processing a ladder deep groove, and a serious tool setting phenomenon occurs. The processed groove is easily affected by the strength of the cutter plate, and the side wall is prone to vibration, making it very difficult to repair subsequently. The cutter plate is affected by the vibration left by the previous process, and the machining allowance is small, so the vibration is left on the workpiece side wall, causing quality defects.

[0004] The types of cutters used in the processing method from shallow to deep are various, and the cutter needs to be replaced repeatedly according to the depth when processing a narrow groove, and the cumulative error of the cutter is also very serious. The size tolerance of the product groove is very small, which easily causes the risk of processing quality.

[0005] The current cutter uses a whole cutter handle, and the strength of the cutter plate is not high due to the length of the cutter. In addition, each groove of the cutter plate is an independent cutting tool, and the cutter plate for processing a narrow groove is very thin and has poor rigidity.

[0006] When the cutter cuts, the cutter often vibrates and makes noise due to the long overhang and insufficient rigidity. The vibration of the cutter affects the environment and the health of the workers, and the surface quality of the workpiece is not satisfactory due to the vibration of the cutter. In order to solve the above problems, a safe and efficient deep groove cutter with high rigidity is needed to replace the existing cutter. SUMMARY

[0007] The present application aims to provide a multi-stage ladder deep groove cutting cutter, which can solve the problem of insufficient cutter rigidity when cutting a ladder deep groove, and vibration and tool setting in processing.

[0008] The present application provides a multi-stage ladder deep groove cutting cutter, which comprises a cutter handle and a cutter plate. One end of the cutter handle is provided with a support part. The cutter handle is arranged on one side of the end face of the support part, and opposite positioning keys are arranged on the two side faces of the support part. The positioning keys on one side of the support part are connected with the cutter handle. The cutter plate is provided with a plurality of ladder grooves, and a chamfer is arranged at the junction of adjacent ladder grooves.

[0009] The support part of the tool holder and the asymmetrically formed mounting hole of the tool plate; the lower end of the tool plate is extended by 20-45mm, so that the rigidity of the tool holder is extended and strengthened below the center height. Because the tool plate is used according to the center height to determine the center of the cutting part of the tool plate, the strength of the tool plate needs to be increased by increasing the size of the lower end to improve the strength of the tool plate. The design of the asymmetric tool plate is to change the structure that the current tool plate cannot be lengthened, and to increase the strength of the cutting groove tool to reduce the vibration caused by the insufficient rigidity of the cutting groove tool.

[0010] The support part is rectangular, and the length of the support part is between 115-130mm; the tool holder is provided on the end face of the support part, away from the shorter side by 60-100mm.

[0011] Because the length of the support part is in the range of 115-130mm, the positioning key of the extended lower end of the tool holder will have an additional set relative to the existing support part, which better limits the tool plate into the key groove.

[0012] The plurality of positioning keys are uniformly distributed on both sides of the support part, and the positioning keys on both sides of the support part are oppositely arranged; the positioning keys are provided with fixing through holes on both sides.

[0013] The number of positioning keys on each side of the support part is increased from two to three, and the torque of the tool plate is more firmly and reliably transmitted to the plurality of positioning keys.

[0014] The positioning keys on the support part are double-sided keys, which cooperate with the key grooves on the tool plate to install, position and transmit torque; when the cutting force is too large, the tool plate will not loosen in the tool holder. The positioning keys in the middle of the tool holder module can correct the offset of the tool plate, ensuring accurate positioning of the tool plate during installation without offset. The positioning keys play a positioning role in the depth direction, and the tool plate is limited to the center height after being installed to the support part and cannot move downward, ensuring the accuracy of the center height of the tool plate, and the size tolerance between the positioning keys is controlled to be 0.02mm high precision.

[0015] The support part and the tool plate are fixed by a plurality of screws, and the tool holder has three protruding positioning keys for repeated positioning of the tool plate. After the tool plate is installed to the support part, the protruding positioning keys play a limiting role on the tool plate, so that the fixed tool plate will not loosen.

[0016] The tool plate can be installed interchangeably on both sides of the tool holder according to the requirements of the workpiece groove, avoiding interference of the tool holder body. The tool holder can be flexibly converted according to different machine tools, and is divided into left and right installation of the tool plate on the horizontal lathe, and is changed to upper and lower installation of the tool plate when machining on the vertical lathe.

[0017] The fixed bolt on the handle can fix the blade on the handle to form a whole, and the supporting part of the cutter is more firm. The force transmitted to the blade is stable, and the blade has good support on the handle after being raised, so that the strength of the blade is greatly increased, the cutting force is larger, and vibration is naturally eliminated after the rigidity of the blade is improved. The double-sided positioning surface on the handle improves the utilization rate of the handle, which can be changed according to the change of the use environment of the handle, so that the cost of the cutter is saved, and the economy is good.

[0018] The blade is provided with 1-4 stepped grooves.

[0019] The connection part of the width of each stepped groove on the blade is treated by stepped chamfer transition method to avoid stress concentration deformation or easy fracture between the connection parts of the stepped grooves on the blade. The support and stress characteristics of the chamfer make the rigidity of the blade more powerful. The blade is not allowed to cut when cutting the deep groove, the deformation of the blade is small, and the machining efficiency is improved.

[0020] One end of the blade is provided with a key groove and a fixing hole, and the other end is provided with a blade fixing groove; the key groove and the fixing hole are alternately arranged on the blade.

[0021] The installation and positioning part of the stepped deep groove blade and the support is matched according to the asymmetric structure of the handle. The key groove and the fixing hole are made on the blade, and the size of the key groove and the fixing hole is the same as that of the installation and positioning part of the handle.

[0022] During installation, the positioning key on the handle is aligned, the blade is fitted with the handle, and the blade is clamped in the key groove through the bolt to limit the blade and the handle.

[0023] The blade fixing groove is provided with a blade; one side wall of the blade fixing groove is a blade upper pressing tongue; the other side wall is a blade reinforcing support; and the bottom of the blade fixing groove is provided with an elastic deformation gap.

[0024] The blade reinforcing support is designed in an extension mode to provide the strength of the blade, and the rigidity of the blade is strengthened, so that the vibration is reduced.

[0025] The blade upper pressing tongue and the blade reinforcing support are fixed by screws.

[0026] The blade reinforcing support is inclined inwardly to the side of the handle by 13-17 degrees at a position 5-9 mm away from the blade fixing groove; and the blade reinforcing support is inclined inwardly to the side of the handle again by 10-28 degrees at a position 25-45 mm away from the blade fixing groove.

[0027] The interference distance between the workpiece and the cutter body is staggered after the slope, so that the risk of extrusion injury of the blade and the workpiece due to poor chip removal is avoided.

[0028] The edge of the blade reinforcing support is provided with a relief angle with an inward inclination of 0.5-2 degrees on both sides.

[0029] The rear corner treatment with bilateral slope under the blade supporting rib increases the universality of the cutter when cutting workpieces, and the rear corner can avoid scratching the tool plate due to the size change of the inner circle diameter.

[0030] The elastic deformation gap is provided with a hole of 2-6 mm at one end away from the blade fixing groove.

[0031] The installation of the blade on the tool plate needs effective pressing force, and the plastic gap on the tool plate provides firm clamping guarantee for the blade.

[0032] The multi-stage stepped deep groove cutting tool has the beneficial effects that:

[0033] The multi-stage stepped deep groove cutting tool has the beneficial effects that:

[0034] 1. The stepped shape of the cutter can solve the time waste of multiple machining with the least cutter, so that the efficiency of machining deep grooves is increased to more than 60%. The cutter can adopt a profiling machining method to correct the width and depth of the stepped deep groove, solve the problem of groove spacing deviation caused by machine tool error. At the same time, the error of the tool is also solved, the cumulative error is reduced, and the machining of the deep groove becomes very simple.

[0035] 2. The stepped deep groove cutting tool changes the traditional cutting mode, the rigidity of the cutter is increased, the consumption cost of the cutter is reduced, and only 25% of the cost of the previous cutter is needed. The double-sided installation of the cutter reduces the manufacturing cost of the cutter, the interchangeability of the tool plate is strong, through the flexible installation function of the double-sided tool plate, the tool plate can be quickly and accurately combined and installed in any case, and the labor operation cost is saved. The tool plate can be selected as a single or double blade, which can cope with the cutting processing in different environments.

[0036] 3. The blade adopts the standard cutting blade in the market, which is economical and replaceable; different materials can be selected to improve the service life of the blade, the new cutter design will replace the existing cutter, improve the production efficiency, save the correction time due to cutter vibration, and it is expected to save 28 hours for machining a workpiece. The cutting parameter is increased by 55% than the original one. The cutter vibration is reduced to eliminate the surface quality of the workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort based on these drawings.

[0038] Figure 1 Fig. 1 is a schematic diagram of a tool shank of a multi-stage stepped deep groove cutting tool according to the present application;

[0039] Figure 2 Fig. 2 is a side view of the tool shank of the multi-stage stepped deep groove cutting tool according to the present application; Figure 1

[0040] Figure 3 Fig. 3 is a bottom view of the tool shank of the multi-stage stepped deep groove cutting tool according to the present application; Figure 1

[0041] Figure 4 Fig. 4 is a schematic diagram of a tool plate of the multi-stage stepped deep groove cutting tool according to the present application;

[0042] Figure 5 Fig. 5 is a side view of the tool plate of the multi-stage stepped deep groove cutting tool according to the present application; Figure 4

[0043] Figure 6 Fig. 6 is a bottom view of the tool plate of the multi-stage stepped deep groove cutting tool according to the present application; Figure 4

[0044] Figure 7 Fig. 7 is an enlarged view of a part of the tool plate of the multi-stage stepped deep groove cutting tool according to the present application; Figure 4

[0045] Figure 8 Fig. 8 is an enlarged view of a part of the tool plate of the multi-stage stepped deep groove cutting tool according to the present application, when the insert is a single-head insert; Figure 4

[0046] Figure 9 Fig. 9 is a front view of a two-stage groove cutting tool of the multi-stage stepped deep groove cutting tool according to the present application;

[0047] Figure 10 Fig. 10 is a side view of the two-stage groove cutting tool of the multi-stage stepped deep groove cutting tool according to the present application;

[0048] Figure 11 Fig. 11 is a front view of a three-stage groove cutting tool of the multi-stage stepped deep groove cutting tool according to the present application;

[0049] Figure 12 Fig. 12 is a side view of the three-stage groove cutting tool of the multi-stage stepped deep groove cutting tool according to the present application;

[0050] Figure 13 Fig. 13 is a front view of a four-stage groove cutting tool of the multi-stage stepped deep groove cutting tool according to the present application;

[0051] Figure 14 ​​​​​​It is a side view of four-stage groove cutters of a multi-stage ladder deep groove cutting tool of the present application;

[0052] Figure 15 It is a working schematic view of a multi-stage ladder deep groove cutting tool of the present application;

[0053] Figure 16 It is a combined schematic view of a multi-stage ladder deep groove cutting tool of the present application.

[0054] Explanation of reference signs:

[0055] 1: shank; 2: cutter plate; 3: support part; 4: positioning key; 5: ladder groove; 6: chamfer; 7: fixing through hole; 8: key groove; 9: fixing hole; 10: blade; 11: blade upper tongue; 12: blade reinforcing support; 13: elastic deformation notch; 14: blade fixing groove. DETAILED DESCRIPTION

[0056] The technical solutions of the present application will be described clearly and completely below in conjunction with embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0057] In the description of the present application, it should be understood that the terms "center", "radial", "axial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "straight", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0058] In addition, the terms "first", "second", "third", etc. are only used for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited. In addition, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] Referring to Figures 1 to 16 A multi-stage ladder deep groove cutting tool comprises a handle 1 and a blade 2; the handle 1 is provided with a support part 3 at one end; the handle 1 is arranged on one side of the end face of the support part 3, and opposite positioning keys 4 are arranged on the two side faces of the support part 3; the positioning keys 4 arranged on one side of the support part 3 are connected with the handle 1; the blade 2 is provided with multi-stage ladder grooves 5, and chamfers 6 are arranged at the junctions of adjacent ladder grooves 5.

[0060] Specifically, the support part 3 is rectangular, and the length of the support part 3 is between 115-130mm; the handle 1 is arranged on the end face of the support part 3 at a position away from the shorter side by 60-100mm.

[0061] The handle 1 and the support part 3 are of an integrated structure.

[0062] The length of the support part 3 is increased by 33mm based on the existing support part, and the length of the support part 3 is preferably 123mm.

[0063] The asymmetric support part 3 structure is designed on the handle 1, and the distance from the center of the support part 3 of the handle 1 to the bottom of the support part is 78mm. The distance from the center of the existing handle to the bottom of the support part is increased from 45mm to 78mm.

[0064] The asymmetric support part 3 structure is designed on the handle 1, and the force acting on the handle 1 changes when the handle 1 drives the blade 2 to cut and move during the operation of the machine tool, the radial force acting on the handle 1 increases, the support strength increases, and the rigidity of the blade 2 is enhanced.

[0065] Specifically, the number of positioning keys 4 is multiple, and the multiple positioning keys 4 are uniformly distributed on the two sides of the support part 3; the two sides of the positioning key 4 are provided with fixed through holes 7.

[0066] The length of the support part 3 is increased, and the number of positioning keys 4 on each side of the support part 3 is three. The blade 2 is better positioned in the key groove 8 through the three protruding positioning keys 4, and the torque of the blade 2 is more firmly and reliably transmitted to the three positioning keys 4. The stability of the force transmitted to the blade 2 is improved.

[0067] Specifically, the blade 2 is provided with 1-4 stage ladder grooves 5.

[0068] The blade 2 is preferably provided with 4 stage ladder grooves 5, and the angle of the chamfer 6 at the junction of adjacent ladder grooves 5 is preferably 135 degrees.

[0069] The 135-degree chamfer increases the junction cross section of the blade 2, does not reduce the rigidity of the blade 2, and makes the cutting more stable after the rigidity of the blade 2 is enhanced due to the increased area of the blade support 12, thereby ensuring the machining quality of the workpiece surface.

[0070] A first level stepped groove, a second level stepped groove, a third level stepped groove and a fourth level stepped groove are sequentially arranged away from the key groove 8 and the fixing hole 9 and the blade 10 is arranged on the fourth level stepped groove (if the blade plate 2 is the fourth level stepped groove 5).

[0071] Specifically, the key groove 8 and the fixing hole 9 are alternately arranged on the blade plate 2.

[0072] The blade plate 2 is limited by the key groove 8 and the positioning key 4 and is locked and fixed by the bolt through the fixing hole 9 and the fixed through hole 7.

[0073] The blade 10 is fixed in the blade fixing groove 14.

[0074] Specifically, the blade 10 is arranged in the blade fixing groove 14, one side wall of the blade fixing groove 14 is the blade tongue pressing part 11, the other side wall is the blade reinforcing support 12, and the bottom of the blade fixing groove 14 is provided with an elastic deformation gap 13.

[0075] The blade 10 is fastened by locking the blade tongue pressing part 11 and the blade reinforcing support 12 by the bolt, and effective pressing force is generated on the blade 10. The elastic deformation gap 13 guarantees the clamping of the blade 10.

[0076] The blade fixing groove 14 is arranged on the center of the blade plate 2.

[0077] The elastic deformation gap 13 is formed by drilling a hole on the blade plate 2 in an elastic deformation manner, and the hole is cut along the center of the hole to the clamping part of the blade 10.

[0078] Specifically, the blade tongue pressing part 11 and the blade reinforcing support 12 are fixed by the screw.

[0079] Specifically, the blade reinforcing support 12 is inwardly inclined by 13-17 degrees to one side of the handle 1 at a distance of 5-9 mm away from the blade fixing groove 14, and the blade reinforcing support 12 is inwardly inclined by 10-28 degrees to one side of the handle 1 again at a distance of 25-45 mm away from the blade fixing groove 14.

[0080] The blade reinforcing support 12 is inwardly inclined by 15 degrees to one side of the handle 1 at a distance of 7.5 mm away from the blade fixing groove 14, and the blade reinforcing support 12 is inwardly inclined by 18 degrees to one side of the handle 1 again at a distance of 33 mm away from the blade fixing groove 14.

[0081] Specifically, the edge of the blade reinforcing support 12 is provided with a clearance angle of 0.5-2 degrees on both sides.

[0082] The blade reinforcing support 12 is processed with a rear corner of 1 degree of bilateral slope to avoid scratching the blade plate 2 due to the size change of the diameter of the inscribed circle.

[0083] Specifically, the elastic deformation gap 13 is provided with a hole of 2-6 mm at one end away from the blade fixing groove 14.

[0084] The elastic deformation gap 13 is provided with a hole of 4 mm at one end away from the blade fixing groove 14, and a gap is formed at the blade 10 clamping position by cutting 2 mm away from the center of the hole.

[0085] The blade 10 is affected by the local stress of the blade plate 2, and the elastic deformation gap 13 part will be deformed and opened, and then, according to the requirements of the blade fixing groove 14, the blade 10 positioning groove is arranged at the blade 10 clamping and positioning position. The blade upper pressing tongue 11 is pressed tightly by using the pressing screw, and the blade upper pressing tongue 11 is fixed into the blade 10 positioning groove after being attached to the blade 10. When replacing the blade 10, the blade upper pressing tongue pressing screw is loosened, and the blade 10 can be taken out. The blade upper pressing tongue pressing screw should avoid screw leakage, otherwise the iron filings will grind the screw and it is difficult to disassemble, and the screws on the blade plate 2 are all sunk into the blade upper pressing tongue.

[0086] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A multi-stage stepped deep groove cutting tool, characterized in that, include: A handle (1) and a blade (2); one end of the handle (1) is provided with a support part (3); the handle (1) is located on one side of the end face of the support part (3); positioning keys (4) are provided on opposite sides of the support part (3); there are multiple positioning keys (4), which are evenly distributed on both sides of the support part (3); both sides of the positioning keys (4) are provided with fixing through holes (7); the positioning key (4) on one side of the support part (3) is connected to the handle (1); the blade (2) is provided with multi-level stepped grooves (5), and a chamfer (6) is provided at the joint of adjacent stepped grooves (5); The support part (3) is rectangular, and the length of the support part (3) is between 115-130mm; a handle (1) is provided on the end face of the support part (3) at a position between 60-100mm away from the shorter side. One end of the blade plate (2) is provided with a keyway (8) and a fixing hole (9), and the other end is provided with a blade fixing groove (14); the keyway (8) and the fixing hole (9) are alternately arranged on the blade plate (2); The blade fixing groove (14) is provided with a blade (10); one side wall of the blade fixing groove (14) is a blade upper pressure tongue (11); the other side wall is a blade reinforcement support (12); the bottom of the blade fixing groove (14) is provided with an elastic deformation notch (13). The blade reinforcement support (12) is 5-9 mm away from the blade fixing groove (14) and inclined inward at 13-17 degrees to one side of the handle (1); the blade reinforcement support (12) is 25-45 mm away from the blade fixing groove (14) and inclined inward again at 10-28 degrees to one side of the handle (1). The edge of the blade reinforcement support (12) has a rear angle of 0.5-2 degrees on both sides; The pressure tongue (11) on the blade and the blade reinforcement support (12) are fixed by screws.

2. The multi-stage stepped deep groove cutting tool according to claim 1, characterized in that, The blade (2) is provided with 1-4 stepped grooves (5).

3. The multi-stage stepped deep groove cutting tool according to claim 1, characterized in that, The elastic deformation notch (13) has a 2-6mm hole at one end away from the blade fixing groove (14).

Images