Machine tool spindle sleeve

Abstract

The utility model relates to the technical field of machine tool machining, and provides a machine tool spindle sleeve which comprises a base and a gland, the base and the gland are provided with a first installation groove and a second installation groove respectively, and the gland is fixedly installed on the base. The first mounting groove and the second mounting groove are oppositely arranged in the first direction to form a mounting space for mounting the head of the machine tool spindle; the two opposite side edges, in the first direction, of groove openings of the first mounting groove and the second mounting groove are chamfered. The groove bottom of the first mounting groove and the groove bottom of the second mounting groove are each provided with a receding groove, the two receding grooves are oppositely formed in the first direction, and the receding grooves are used for receding a bearing chamber of the machine tool spindle. According to the utility model, the machine tool spindle can be well matched with the machine tool spindle sleeve, and the assembly precision of the machine tool spindle is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lathe machining technical field especially relates to a lathe main shaft sleeve. BACKGROUND

[0002] The machining precision of the lathe main shaft has a key influence on its use state. When boring the mounting hole of the lathe main shaft, first, a steel skin is placed on the cooperation surface of the base and the gland, then the steel skin, the base and the gland are locked together through the bolt, and then the whole connecting body is fixed on the boring machine to bore the lathe main shaft. After boring, the steel skin is removed, and the lathe main shaft is reassembled to the lathe main shaft sleeve. Due to pressure release, the base and the gland will produce slight deformation, and the mounting surface formed by the connection of the base and the gland no longer maintains the ideal circular profile. During reassembly, the unexpected deformation of the gland and the base may cause the lathe main shaft to be locally extruded, and the fitting degree between the lathe main shaft and the lathe main shaft sleeve is reduced, thereby affecting the quality and performance of the assembly of the lathe main shaft. SUMMARY

[0003] The utility model provides a lathe main shaft sleeve to solve the problem that the lathe main shaft sleeve produces unexpected deformation after boring the lathe main shaft, which reduces the fitting degree between the lathe main shaft and the lathe main shaft sleeve, thereby affecting the quality and performance of the assembly of the lathe main shaft.

[0004] The utility model provides a lathe main shaft sleeve, which comprises a base and a gland, the base and the gland are respectively provided with a first installation slot and a second installation slot, the gland is fixedly installed on the base, and the first installation slot and the second installation slot are oppositely arranged along a first direction to form an installation space for installing the head part of the lathe main shaft.

[0005] Among them, the two sides of the slot opening of the first installation slot and the second installation slot along the first direction are both chamfered; the groove bottom of the first installation slot and the groove bottom of the second installation slot are respectively provided with an emptying groove, the two emptying grooves are oppositely arranged along the first direction, and the emptying groove is used for avoiding the bearing chamber of the lathe main shaft.

[0006] According to the lathe main shaft sleeve provided by the utility model, the groove bottom of the first installation slot has a transition surface at the connection with the emptying groove slot opening.

[0007] According to the lathe main shaft sleeve provided by the utility model, the emptying groove is a tapered groove.

[0008] According to the lathe main shaft sleeve provided by the utility model, the depth of the emptying groove is 0.085mm~0.2mm;

[0009] And / or, the extension length of the avoidance slot along the first direction is 25mm-40mm.

[0010] According to the machine tool spindle sleeve, the chamfer face of the chamfer is a plane, and / or the inclination angle of the chamfer is 15-55 degrees.

[0011] According to the machine tool spindle sleeve, the chamfer is a multi-stage chamfer, and any two adjacent chamfer faces on the multi-stage chamfer are arranged at an obtuse angle.

[0012] According to the machine tool spindle sleeve, the included angle between any two adjacent chamfer faces on the multi-stage chamfer is 140-170 degrees.

[0013] According to the machine tool spindle sleeve, the multi-stage chamfer is a two-stage chamfer, the two-stage chamfer is divided into a first-stage chamfer and a second-stage chamfer, the first-stage chamfer is located at the bottom of the two-stage chamfer, and the second-stage chamfer is located at the top of the second-stage chamfer.

[0014] According to the machine tool spindle sleeve, the width of the first-stage chamfer is 0.02-0.05mm.

[0015] And / or, the depth of the first-stage chamfer is 4-6mm.

[0016] According to the machine tool spindle sleeve, the width of the second-stage chamfer is 0.3-0.5mm.

[0017] And / or, the depth of the second-stage chamfer is 6-8mm.

[0018] The machine tool spindle sleeve is fixed and clamped by the base and the gland, the two sides of the slot of the first mounting groove and the second mounting groove are chamfered in the first direction, so that the stress deformation of the base and the gland caused by boring of the machine tool spindle is eliminated, the edge stress concentration of the machine tool spindle sleeve is reduced, and the machine tool spindle can be uniformly stressed; meanwhile, the two avoidance slots are arranged at positions corresponding to the bearing chamber of the machine tool spindle at the bottom of the first mounting groove and the second mounting groove, so that sufficient avoidance space is provided, the bearing chamber of the machine tool spindle is prevented from being extruded and deformed, vibration caused by non-natural operation of the bearing due to extrusion of the bearing chamber of the machine tool spindle is effectively reduced, the machine tool spindle and the machine tool spindle sleeve can be well matched, and the assembly precision of the machine tool spindle is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the 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 labor.

[0020] Figure 1 The figure is a schematic view of the cooperation of the base, the gland and the main shaft of the machine tool provided by the present application.

[0021] Figure 2 The figure is a schematic view of the structure of the base provided by the present application.

[0022] Figure 3 The figure is a schematic view of the structure of the gland provided by the present application.

[0023] Figure 4 The figure is a schematic view of the cooperation of the base, the gland and the main shaft of the machine tool provided by the present application. Figure 2 The figure is an enlarged schematic view at B.

[0024] Figure 5 The figure is a schematic view of the cooperation of the base, the gland and the main shaft of the machine tool provided by the present application. Figure 2 The figure is an enlarged schematic view at A.

[0025] Reference signs:

[0026] 1, base; 11, first installation groove; 111, clearance groove; 112, transition surface; 2, gland; 21, second installation groove; 3, chamfer; 31, first-stage chamfer; 32, second-stage chamfer; 100, main shaft of machine tool. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present application more clear, the following will combine the drawings in the present application to clearly and completely describe the technical solutions in the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present application.

[0028] The features of the terms "first", "second" in the specification and claims of the present application can be explicitly or implicitly included one or more features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0029] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0030] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0031] The utility model provides a kind of machine tool spindle sleeve, including: base 1 and gland 2. Figures 1-5 The utility model provides a kind of machine tool spindle sleeve, including: base 1 and gland 2.

[0032] As shown in Figure 1 And Figure 2 The utility model provides a kind of machine tool spindle sleeve, including: base 1 and gland 2.

[0033] The utility model provides a kind of machine tool spindle sleeve, including: base 1 and gland 2.

[0034] The machining accuracy of the machine tool spindle 100 has a key influence on its use state. When boring the mounting hole of the machine tool spindle 100, a steel sheet is first placed on the mating surface of the base 1 and the gland 2, and then the steel sheet, the base 1 and the gland 2 are locked together through bolts, and then the whole connecting body is fixed on the boring machine to bore the machine tool spindle 100. After the boring is completed, the steel sheet is removed and the machine tool spindle 100 is reassembled to the machine tool spindle sleeve. Due to the release of pressure, the base 1 and the gland 2 will be slightly deformed, and the mounting surface formed by the connection of the base 1 and the gland 2 can no longer maintain the ideal circular profile. During reassembly, the unexpected deformation of the gland 2 and the base 1 can cause the machine tool spindle 100 to be locally extruded, and the fit between the machine tool spindle 100 and the machine tool spindle sleeve is reduced, thereby affecting the assembly quality and performance of the machine tool spindle 100.

[0035] As shown in Figure 2 , the base 1 is provided with a first mounting groove 11. Correspondingly, as shown in Figure 3 , the gland 2 is provided with a second mounting groove 21. The first mounting groove 11 extends along a first direction. It should be noted that the first direction refers to a direction parallel to the axial direction of the machine tool spindle 100. The first mounting groove 11 is used to mount the machine tool spindle 100 to provide support for the machine tool spindle 100 through the base 1.

[0036] As shown in Figure 1 , the gland 2 is arranged at one end of the first mounting groove 11, and the first mounting groove 11 and the second mounting groove 21 are oppositely arranged so as to tightly fix the head of the machine tool spindle 100 through the cooperation of the gland 2 and the base 1. The bottom surface of the first mounting groove 11 and the bottom surface of the second mounting groove 21 are both arc surfaces, and the two arc surfaces are adapted to each other to jointly form the mounting surface of the head of the machine tool spindle 100. Alternatively, the gland 2 and the base 1 can be fixed together by bolts or clamps and the like.

[0037] As shown in Figure 2 , the first mounting groove 11 is provided with a chamfer 3 on the opposite sides in the first direction. The second mounting groove 21 is also correspondingly provided with a chamfer 3 on the opposite sides in the first direction. The chamfers 3 on the base 1 and the gland 2 correspond to each other to reduce the edge stress concentration of the machine tool spindle sleeve, prevent the edge of the machine tool spindle sleeve from being inwardly retracted, and help to ensure that the mounting surface of the machine tool spindle 100 is uniformly stressed and the fit between the machine tool spindle 100 and the machine tool spindle sleeve is improved.

[0038] The conventional machine tool spindle 100 is easily deformed due to the fastening force of the base 1 and the gland 2, so that the bearings in the bearing chamber cannot normally and naturally rotate, the bearings are prone to generate heat and vibration, and the service life of the machine tool spindle 100 is affected. In some embodiments of the present application, as shown in Figure 2 and Figure 3As shown, the groove bottom of the first mounting groove 11 and the groove bottom of the second mounting groove 21 are respectively provided with an emptying groove 111. The two emptying grooves 111 are oppositely arranged along the first direction. The emptying groove 111 is used for avoiding the bearing chamber of the machine tool spindle 100.

[0039] Specifically, the two emptying grooves 111 are respectively arranged at the positions corresponding to the bearing chamber of the machine tool spindle 100 on the groove bottom of the first mounting groove 11 and the groove bottom of the second mounting groove 21, so as to provide sufficient emptying space, avoid the extrusion deformation of the bearing chamber of the machine tool spindle 100 due to excessive fastening force, effectively reduce the vibration of the bearing chamber of the machine tool spindle 100 caused by the extrusion, and avoid the abnormal natural operation of the machine tool spindle 100.

[0040] For example, for the machine tool spindle 100 with a diameter of 105mm, the diameter of the mounting surface formed by the base 1 and the gland 2 is 105mm to 105.015mm, and the base 1 and the gland 2 are respectively deepened by 0.05mm~0.1mm at the positions corresponding to the bearing chamber of the machine tool spindle 100, so as to ensure that the bearing chamber of the machine tool spindle 100 has sufficient emptying space, and then ensure that the machine tool spindle 100 and the machine tool spindle sleeve can be well matched, and the assembly precision of the machine tool spindle is improved.

[0041] The utility model provides a kind of machine tool spindle sleeve, the base 1 and the gland 2 are clamped and fixed to machine tool spindle 100, the groove of the first mounting groove 11 and the second mounting groove 21 is chamfered 3 and is arranged on the two side edges of the opposite side along the first direction, to eliminate the stress deformation of the base 1 and the gland 2 caused by the boring of machine tool spindle 100, reduce the edge stress concentration of machine tool spindle sleeve, so that machine tool spindle 100 can be uniformly stressed;At the same time, the two emptying grooves 111 are respectively arranged at the positions corresponding to the bearing chamber of the machine tool spindle 100 on the groove bottom of the first mounting groove 11 and the groove bottom of the second mounting groove 21, so as to provide sufficient emptying space, avoid the extrusion deformation of the bearing chamber of the machine tool spindle 100, effectively reduce the vibration of the bearing chamber of the machine tool spindle 100 caused by the extrusion, ensure that the machine tool spindle 100 and the machine tool spindle sleeve can be well matched, and the assembly precision of the machine tool spindle is improved.

[0042] As shown in the figure, Figure 4 The groove bottom of the first mounting groove 11 has a transition surface 112 at the connection with the groove opening end of the emptying groove 111, so that the groove bottom surface of the first mounting groove 11 can smoothly transition to the emptying groove 111, so that the bearing chamber of the machine tool spindle 100 can be uniformly stressed, and the stress of the machine tool spindle 100 at the emptying groove 111 is reduced. Alternatively, the emptying groove 111 is a tapered groove, which can also achieve the above technical effects.

[0043] Optionally, the depth of the emptying groove 111 is 0.085mm~0.2mm.

[0044] The depth of the clearance groove 111 can be 0.085mm, 0.1mm, 0.125mm, 0.15mm or 0.2mm. Preferably, the depth of the clearance groove 111 is 0.1mm.

[0045] Optionally, the extension length of the clearance groove along the first direction is 25mm~40mm.

[0046] The extension length of the clearance groove 111 along the first direction can be 25mm, 28mm, 30mm, 34mm, 37mm or 40mm. Preferably, the extension length of the clearance groove 111 along the first direction is 30mm.

[0047] During machining, a φ10 two-blade ball head milling cutter is used to mill the circular arc clearance position from the curved surface outside. According to the requirement of the length of the machine tool spindle 100, combined with the position of the bearing chamber of the machine tool spindle 100 and the thickness of the bearing, the position and extension length of the clearance groove 111 can be obtained. For example, for a machine tool spindle 100 with an installation length of 175mm, the distance from one end of the clearance groove 111 to the outermost end of the machine tool spindle sleeve is 20mm, the distance from the other end of the clearance groove 111 to the outermost end of the machine tool spindle sleeve is 125mm, and the extension length of the clearance groove 111 is 30mm, so that the machine tool spindle sleeve has sufficient clearance length, ensuring the clearance effect on the bearing chamber of the machine tool spindle.

[0048] In some embodiments, the chamfer 3 face of the chamfer 3 is a plane. And / or, the inclination angle of the chamfer 3 is 15°~55°.

[0049] Specifically, the chamfer 3 face is cut along a certain direction at the slot opening of the first mounting groove 11 and / or the slot opening of the second mounting groove 21, and the chamfer 3 face formed presents a plane shape and maintains a certain angle with the slot wall of the first mounting groove 11 and / or the second mounting groove 21.

[0050] Further, the inclination angle of the chamfer 3 is set to 15°~55°, which is the included angle between the chamfer 3 face and the slot wall of the first mounting groove 11 and / or the second mounting groove 21. The specific inclination angle can be adjusted according to the edge deformation degree of the base 1 and the gland 2. Optionally, the inclination angle of the chamfer 3 can be 15°, 20°, 30°, 40°, 50° or 55°. Preferably, the inclination angle is 30°, which can better balance the machining difficulty and the assembly effect of the machine tool spindle 100.

[0051] In some other embodiments, the chamfer 3 is a multi-stage chamfer. Any two adjacent chamfer surfaces on the multi-stage chamfer are arranged at an obtuse angle. In this embodiment, the chamfer 3 adopts a multi-stage chamfer structure. The two side edges of the first mounting groove 11 and the second mounting groove 21 opposite in the first direction are formed by multiple cutting processes with different angles to form multiple chamfer surfaces with different angles. Each chamfer surface is arranged in sequence, and the included angle between each stage of chamfer surfaces is arranged at an obtuse angle, so as to better expand the edges of the base 1 and the gland 2, and ensure that the shape of the edges of the base 1 and the gland 2 can better adapt to the shaft surface of the machine tool spindle 100, and ensure the clamping force of the base 1 and the gland 2 on the machine tool spindle 100.

[0052] Through the design of the multi-stage chamfer, the slot openings of the first mounting groove 11 and the second mounting groove 21 are smoothly transitioned to the upper surface of the base 1, reducing the existence of acute angles, and the transition angles of the multiple chamfer surfaces are relatively smooth, which can effectively avoid damage of the base 1 and the gland 2 due to stress concentration, and improve the stability of the machine tool spindle 100 during use.

[0053] Optionally, the included angle between any two adjacent chamfer surfaces on the multi-stage chamfer is 140°-170°.

[0054] During processing, the two side edges of the first mounting groove 11 and the second mounting groove 21 opposite in the first direction are first subjected to preliminary chamfer processing to form a first-stage chamfer surface. The first-stage chamfer surface forms a relatively gentle included angle with the groove wall of the first mounting groove 11 and / or the second mounting groove 21. Then, the first-stage chamfer surface is subjected to second chamfer processing to form a second-stage chamfer surface, so that the included angle between the second-stage chamfer surface and the first-stage chamfer surface is 140°. Further, according to needs, third-stage or more-stage chamfer processing can be continuously performed, and the included angle between the two adjacent chamfer surfaces is always maintained at an obtuse angle. For example, the included angle between the third-stage chamfer surface and the second-stage chamfer surface is 170°.

[0055] In a preferred embodiment, as shown in Figure 5 the multi-stage chamfer is a two-stage chamfer. The two-stage chamfer includes a first-stage chamfer 31 and a second-stage chamfer 32. The first-stage chamfer 31 is located at the bottom of the two-stage chamfer 3, and the second-stage chamfer 32 is located at the top of the two-stage chamfer 32.

[0056] Through the design of the two-stage chamfer, the two side edges of the first mounting groove 11 and the second mounting groove 21 opposite in the first direction both present two smoothly transitioned chamfer surfaces. The included angle between the first-stage chamfer 31 and the second-stage chamfer 32 is reasonable, avoiding acute angles and excessive cutting forces. Not only does this reduce stress concentration at the edges of the base 1 and the gland 2, but also enhances the fastening strength on the machine tool spindle 100.

[0057] Optionally, the first level chamfer 31 has a width of 0.02mm to 0.05mm. And / or, the first level chamfer 31 has a depth of 4mm to 6mm. Optionally, the first level chamfer 31 can have a width of 0.02mm, 0.03mm, 0.04mm or 0.05mm. The first level chamfer 31 can have a depth of 4mm, 4.5mm, 5mm or 6mm. Preferably, the first level chamfer 31 has a width of 0.04mm and a depth of 5mm. The purpose of the first level chamfer 31 is to remove sharp edges and provide a basis for the second level chamfer 32. The depth and width of the first level chamfer 31 are precisely controlled to ensure smooth transition of the chamfer 3 part and avoid excessive cutting force.

[0058] And / or, the second level chamfer 32 has a width of 0.3mm to 0.5mm. And / or, the second level chamfer 32 has a depth of 6mm to 8mm. Optionally, the second level chamfer 32 can have a width of 0.3mm, 0.4mm or 0.5mm. The second level chamfer 32 can have a depth of 6mm, 6.5mm, 7mm or 8mm.

[0059] After the first level chamfer 31 is machined, the second level chamfer 32 is machined. The second level chamfer 32 has a width of 0.4mm and a depth of 8mm. The second level chamfer 32 is deeper than the first level chamfer 31 and has a larger width, which can further remove sharp edges and achieve smooth transition of the edges of the base 1 and the gland 2.

[0060] When chamfering the base 1 and the gland 2, first, the diameters of the first mounting groove 11 of the base 1 after boring and the second mounting groove 21 of the gland 2 after boring are measured in sequence. The base 1 and the gland 2, which have been disassembled, are fixed on the workbench of the machining mother machine by means of extrusion blocks or magnetic chucks, etc., to ensure the stability of the base 1 and avoid displacement during machining. Then, the lever dial gauge is fixed on the universal magnetic table stand to measure the diameters of the first mounting groove 11 and the second mounting groove 21. Then, the arc surface angles of the first mounting groove 11 and the second mounting groove 21 are measured respectively. The probe is used to measure the "front, middle and rear" three positions on the groove wall of the first mounting groove 11 and the second mounting groove 21 respectively, and the automatically calculated deflection angle is compensated in the machining program to ensure the machining accuracy. Then, based on the arc surface angles of the first mounting groove 11 and the second mounting groove 21, the preset width and depth of the chamfer 3 are calculated. Finally, the milling cutter is used to mill the chamfer 3 with a preset width and depth on the two sides of the groove opening of the first mounting groove 11 and the second mounting groove 21 in the first direction in sequence. A φ10 two-edge ball end mill can be used to chamfer 3 in the manner of parallel cutting lines from top to bottom.

[0061] Finally, it should be noted that the above examples are intended to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A machine tool spindle cartridge, characterized by, The utility model relates to a base and a cover, the base and the cover are equipped with first installation groove and second installation groove respectively, the cover is fixedly installed on the base, and first installation groove and second installation groove are oppositely arranged along the first direction to form the installation space for installing lathe spindle head part. Wherein, the two sides of the first installation groove and the second installation groove are chamfered along the first direction; the bottom of the first installation groove and the bottom of the second installation groove are respectively provided with an empty slot, and the two empty slots are oppositely arranged along the first direction, which is used for avoiding the bearing chamber of the lathe spindle. The bottom of the first installation groove has a transition surface at the connection with the empty slot.

2. A machine tool spindle cartridge according to claim 1, characterised in that, The empty slot is a tapered slot.

3. A machine tool spindle cartridge according to claim 1, characterised in that, The depth of the empty slot is 0.085mm~0.2mm; 4. A machine tool spindle cartridge according to claim 1, characterised in that, And / or, the extension length of the empty slot along the first direction is 25mm~40mm. The chamfer surface of the chamfer is a plane; and / or, the inclination angle of the chamfer is 15°~55°.

5. The machine tool spindle cartridge of claim 1, wherein, The chamfer is a multi-stage chamfer, and any two adjacent chamfer surfaces on the multi-stage chamfer are obtuse.

6. The machine tool spindle cartridge of claim 1, wherein, The included angle between any two adjacent chamfer surfaces on the multi-stage chamfer is 140°~170°.

7. A machine tool spindle cartridge according to claim 6, characterised in that, The multi-stage chamfer is a two-stage chamfer, which is divided into a first-stage chamfer and a second-stage chamfer, the first-stage chamfer is located at the bottom of the two-stage chamfer, and the second-stage chamfer is located at the top of the second-stage chamfer.

8. A machine tool spindle cartridge according to claim 6, characterised in that, The width of the first-stage chamfer is 0.02mm~0.05mm; 9. A machine tool spindle cartridge according to claim 8, characterised in that, And / or, the depth of the first-stage chamfer is 4mm~6mm. The width of the second-stage chamfer is 0.3mm~0.5mm; 10. A machine tool spindle cartridge according to claim 8, characterised in that, And / or, the depth of the second-stage chamfer is 6mm~8mm. ​

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