CN214024858U - Grinding wheel and grinding machine tool equipped with same - Google Patents

Abstract

The utility model belongs to the technical field of compressor crankshaft machining equipment, especially, relate to a grinding wheel and be equipped with grinding machine of this grinding wheel. The grinding wheel comprises a wheel body and a grinding bulge arranged on the outer wall of the wheel body in the circumferential direction of the central shaft of the wheel body, and the top surface molded line of the grinding bulge inclines relative to the central shaft of the wheel body. Use the technical scheme of the utility model the machining process technique to the main shaft profile line portion and countershaft profile line portion surface of this bent axle among the bent axle surface machining technique that can solve now can't guarantee the size on main shaft profile line portion and countershaft profile line portion surface and the problem of surface quality.

Description

Grinding wheel and grinding machine tool equipped with same

Technical Field

The utility model belongs to the technical field of compressor crankshaft machining equipment, especially, relate to a grinding wheel and be equipped with grinding machine of this grinding wheel.

Background

Currently, as shown in fig. 1 and 2, the compressor 100 ' includes a crankshaft 102 ', the crankshaft 102 ' includes a main shaft portion 1020 ', an auxiliary shaft portion 1022 ', and an eccentric portion 1024 ', the main bearing 104 ' is disposed on the main shaft portion 1020 ', the auxiliary bearing 106 ' is disposed on the auxiliary shaft portion 1022 ', the cylinder 108 ' includes a cylinder cavity, the piston 114 ' is disposed on the eccentric portion 1024 ', the rotor 110 ' is connected to the main shaft portion 1020 ', and the balance weight 112 ' is disposed on the rotor 110 '. As shown in fig. 2, the portions where the main shaft portion 1020 'and the main bearing 104', the sub shaft portion 1022 'and the sub bearing 106', and the eccentric portion 1024 'are engaged with the piston 114' most easily cause reliability problems such as abnormal wear, and a portion where the main shaft portion 1020 'and the main bearing 104' are easily worn is shown in a portion a 'in fig. 2 (in addition, when the crankshaft 102 is swung between the sub shaft portion 1022' and the sub bearing 106 ', the sub bearing 106' may wear the sub shaft portion 1022 '), in order to ensure reliability of the kinematic pair at the engaged portions, in the prior art, only a relatively thick shaft diameter and a relatively high bearing are used, which increases the volume, cost, and friction loss of the compressor 100'.

As can be seen from the study, when the compressor 100 ' is operated, the main shaft portion 1020 ' and the auxiliary shaft portion 1022 ' of the crankshaft 100 ' are subject to force during the rotation of the crankshaft 102, and are prone to deflection, such that the main shaft portion 1020 ' contacts the main bearing 104 ' and the auxiliary shaft portion 1022 ' contacts the auxiliary bearing 106 ', and the main shaft portion 1020 ' and the auxiliary shaft portion 1022 ' are worn away as the crankshaft 102 ' continuously rotates. Therefore, the utility model discloses a people improves current bent axle 102' and has obtained new bent axle 102, as shown in fig. 3, bent axle 102 surface has increased the structural design of main shaft type line portion 110 and countershaft type line portion 120, when bent axle 102 took place the beat in the rotation process, between main shaft 1020 and the main bearing 104 because main shaft 1020 has increased main shaft type line portion 110, between countershaft 1022 and the auxiliary bearing 106 because countershaft 1022 has increased countershaft type line portion 120, the area of contact between main shaft 1020 and the main bearing 104, between countershaft 1022 and the auxiliary bearing 106 increases, reduce contact stress, reduce wearing and tearing then. However, in the conventional crankshaft surface machining techniques, the machining process techniques for the surfaces of the main shaft type line portion 110 and the auxiliary shaft type line portion 120 of the crankshaft 102, such as turning, cannot ensure the dimensions and surface quality of the surfaces of the main shaft type line portion 110 and the auxiliary shaft type line portion 120.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a grinding wheel and be equipped with this grinding wheel's grinding machine tool aims at solving among the current bent axle surface machining technique to the main shaft type line portion of this bent axle and the processing technology technique on countershaft type line portion surface, can't guarantee the problem of the size and the surface quality on main shaft type line portion and countershaft type line portion surface.

In order to achieve the above object, the utility model adopts the following technical scheme: a grinding wheel comprises a wheel body and a grinding bulge arranged on the outer wall of the wheel body in the circumferential direction around the central axis of the wheel body, wherein the top surface molded line of the grinding bulge inclines relative to the central axis of the wheel body.

Optionally, the top profile of the grinding lobe is a straight line.

Alternatively, the top profile of the grinding protuberance is a curve of a predetermined shape.

Optionally, the profile of the top surface of the grinding lobe is an arc projecting away from the central axis of the grinding wheel body.

Optionally, the top profile of the grinding lobe is a wavy line.

Optionally, the grinding embossment comprises an embossment base and a grinding machining portion, the grinding machining portion being supported by the embossment base for attachment to the outer wall of the grinding wheel body.

Alternatively, when the width of the grindstone wheel body is S1, the width of the raised base is S2, and the width of the grinding portion is S3 in the extending direction of the center axis of the grindstone wheel body, S1 > S3 ≧ S2.

Alternatively, the grinding wheel body, the raised base and the grinding work portion are of an integrally formed structure.

Optionally, the grinding wheel body, the raised base and the grinding processing part are of a split connection forming structure, and the three are respectively manufactured and formed by different hard materials.

According to another aspect of the present invention, a grinding machine is provided. In particular, the grinding machine comprises a grinding wheel as described previously.

The utility model discloses following beneficial effect has at least:

use the utility model discloses a grinding wheel carries out the profile line portion on the abrasive machining shaping bent axle to the bent axle, and the grinding through grinding wheel is protruding to carry out grinding shaping profile line portion to the bent axle for the size precision and the surface quality homoenergetic of the profile line portion that the grinding obtained can obtain guaranteeing, have laid the technical basis for manufacturing the bent axle that air condition compressor used in batches, high efficiency and precision high ground production.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

FIG. 1 is a schematic view illustrating an assembly structure of a crankshaft in a conventional compressor;

FIG. 2 is a schematic structural diagram illustrating a deflection of a crankshaft in a conventional compressor;

fig. 3 is a schematic view of an assembly structure between a crankshaft and main and auxiliary bearings obtained by grinding with the grinding wheel of the present invention;

fig. 4 is a schematic view of an assembly positioning structure of a numerical control centerless grinding machine provided with a grinding wheel before grinding an existing compressor crankshaft;

fig. 5 is a schematic structural diagram of a crankshaft manufactured by grinding with the grinding wheel provided by the present invention;

FIG. 6 is a diagram showing the moving track of the roundness measuring instrument probe during the roundness measurement process of the main shaft profile part and the auxiliary shaft profile part, wherein the profiles of the finished roundness measuring instrument after grinding are all straight lines inclined relative to the axis of the crankshaft;

figure 7 is a cross-sectional view of a first embodiment of a grinding wheel provided by the present invention;

figure 8 is a cross-sectional view of a second embodiment of a grinding wheel provided by the present invention;

figure 9 is a cross-sectional view of a third embodiment of a grinding wheel provided by the present invention;

fig. 10 is an enlarged view at E in fig. 9.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 7, the first embodiment of the present invention provides a grinding wheel, specifically, the grinding wheel includes a wheel body 510 and a grinding protrusion 521 disposed on the outer wall of the wheel body 510 around the central axis of the wheel body 510, wherein the top surface profile of the grinding protrusion 520 is disposed tangentially to the central axis of the wheel body 510. When the grinding wheel is actually produced, the grinding wheel can be set to be of models with various diameter sizes, so that the grinding wheel can be used for crankshafts with different diameters and parts with different diameter sizes in the same crankshaft. For example, when the grinding wheel is applied to a numerical control centerless grinding machine to grind a crankshaft of an air conditioner compressor to obtain a corresponding profile part on the crankshaft, two grinding wheels with different diameters are used simultaneously, namely a main shaft grinding wheel 200 and a secondary shaft grinding wheel 300, wherein a grinding bulge 520 on the main shaft grinding wheel 200 is a first bulge 201, and a grinding bulge 520 on the secondary shaft grinding wheel 300 is a second bulge 301, as shown in fig. 4.

As shown in fig. 5, in order to manufacture the crankshaft 102 used in the air conditioner compressor in a batch manner, with high efficiency and accuracy, as shown in fig. 4, the crankshaft 102 is manufactured by grinding using a numerical control centerless grinder (not shown) that does not need to perform positioning by using the axis of the crankshaft 102, that is, the embodiment of the present invention provides a method for processing a crankshaft of an air conditioner compressor. In the implementation process of the processing method of the air conditioner compressor crankshaft, the processing method comprises the following core steps:

the crankshaft 102 is clamped and positioned accurately on the numerically controlled centerless grinding machine, and in practice, the crankshaft 102 is directly clamped and fixed on a guide wheel (not shown) of the numerically controlled centerless grinding machine, the numerically controlled centerless grinding machine is started and the guide wheel is driven to rotate, so that the guide wheel drives the crankshaft 102 to synchronously rotate, and the crankshaft 102 rotates around the central axis of the crankshaft. Namely, the steps are executed: the crankshaft 102 is clamped and positioned by a numerically controlled centerless grinder, wherein a guide wheel of the numerically controlled centerless grinder drives the crankshaft 102 to synchronously rotate around a central axis of the crankshaft.

For different main shaft profile parts 110 and different auxiliary shaft profile parts 120 of different crankshafts 102, different main shaft grinding wheels 200 and different auxiliary shaft grinding wheels 300 are needed to grind the crankshafts 102, so that before the actual grinding process is carried out, the corresponding main shaft grinding wheels 200 and the corresponding auxiliary shaft grinding wheels 300 are necessarily installed on a numerical control centerless grinding machine, the central axes of the main shaft grinding wheels 200 and the auxiliary shaft grinding wheels 300 are coaxial, and a power device of the numerical control centerless grinding machine outputs power to drive the main shaft grinding wheels 200 and the auxiliary shaft grinding wheels 300 to rotate, so that the crankshafts 102 are ground and formed into the main shaft profile parts 110 and the auxiliary shaft profile parts 120. Specifically, a first protrusion 201 is arranged on the main shaft grinding wheel 200 corresponding to the contour shape of the main shaft line portion 110, the first protrusion 201 is arranged around the central axis of the main shaft grinding wheel 200 in the circumferential direction, a second protrusion 301 is arranged on the auxiliary shaft grinding wheel 300 corresponding to the contour shape of the auxiliary shaft line portion 120, the second protrusion 301 is arranged around the central axis of the auxiliary shaft grinding wheel 300 in the circumferential direction, during the grinding process, the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 rotate in opposite directions relative to the crankshaft 102, the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 approach each other with the crankshaft 102 at a constant speed in the circumferential direction to realize circumferential grinding feed, the first protrusion 201 grinds the main shaft portion 1020 of the crankshaft 102 to form the main shaft line portion 110, and the second protrusion 301 grinds the auxiliary shaft portion 102 to form the auxiliary shaft line portion 120, wherein the top surface of the first protrusion 201 relative to the central axis of the main shaft grinding wheel 200 and the top surface of the second protrusion 301 relative to the central axis of the auxiliary shaft grinding wheel 300 are from the central axis of the auxiliary shaft grinding wheel 200 and the second protrusion 1022 relative to the central axis of the auxiliary shaft grinding wheel 300 The direction of the wheel 300 to the spindle grinding wheel 200 is inclined. Namely, the steps are executed: a main shaft grinding wheel 200 and a secondary shaft grinding wheel 300 are installed on a numerical control centerless grinder, wherein the main shaft grinding wheel 200 is provided with a first bulge 201 for grinding the surface of a main shaft type line part 110 of a crankshaft 102, and the secondary shaft grinding wheel 300 is provided with a second bulge 301 for grinding the surface of a secondary shaft type line part 120 of the crankshaft 102.

Then, setting grinding parameters required for grinding of the numerically controlled grinder, and after the necessary grinding parameters are set, starting the numerically controlled centerless grinder, wherein the power unit of the numerically controlled centerless grinder outputs power to drive the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 to rotate respectively, and drives the guide wheel to drive the crankshaft 102 to rotate and simultaneously drive the crankshaft 102 to move towards the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 (namely, the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 approach the crankshaft 102 at a constant speed in opposite directions to realize circumferential grinding feeding), or the power unit of the numerically controlled centerless grinder drives the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 to rotate and simultaneously drive the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 to approach the crankshaft 102 at a constant speed to realize circumferential grinding feeding, so that grinding is performed to grind and process the crankshaft 102.

Use the utility model discloses a processing method of air condition compressor bent axle carries out abrasive machining shaping main shaft molded lines portion 110 and countershaft molded lines portion 120 to bent axle 102, owing to adopt numerical control centerless grinder to carry out abrasive machining shaping for the size precision and the surface quality homoenergetic of main shaft molded lines portion 110 and countershaft molded lines portion 120 that the grinding obtained can obtain guaranteeing, has laid the technological basis for manufacturing bent axle 102 that air condition compressor used in batches, high efficiency and precision height.

In the first embodiment of the present invention, the top surface profile of the grinding protrusion 520 of the grinding wheel is a straight line or a curve of a predetermined shape, wherein when the top surface profile of the grinding protrusion 520 is a curve of a predetermined shape, at this time, the top surface profile may be an arc line protruding toward the central axis direction away from the wheel body 510, and the top surface profile may also be a wavy line. Corresponding to the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 applying the grinding wheel to the numerically controlled grinder, are: the profile of the main shaft profile portion 110 in the cross section along the central axis of the crankshaft may be an oblique straight line angled with respect to the central axis of the crankshaft (accordingly, the profile of the top surface of the first protrusion 201 is an oblique straight line), or may be an arc rounded and recessed toward the central axis of the crankshaft (accordingly, the profile of the top surface of the first protrusion 201 is an arc protruding away from the central axis of the main shaft grinding wheel 200), and likewise, the profile of the sub shaft profile portion 120 in the cross section along the central axis of the crankshaft may be an oblique straight line angled with respect to the central axis of the crankshaft (accordingly, the profile of the top surface of the second protrusion 301 is an oblique straight line), or may be an arc rounded and recessed toward the central axis of the crankshaft (accordingly, the profile of the top surface of the second protrusion 301 is an arc protruding away from the central axis of the sub shaft grinding wheel 300). The line inclination direction of the main shaft line portion 110 is the same as the line inclination direction of the sub shaft line portion 120. Accordingly, the profile of the first protrusion 201 on the main spindle grinding wheel 200 is complementary to the profile of the main spindle profile portion 110, and the profile of the second protrusion 301 on the auxiliary spindle grinding wheel 300 is complementary to the profile of the auxiliary spindle profile portion 120, namely: when the profile of the spindle profile part 110 is an inclined straight line, the profile of the first protrusion 201 on the spindle grinding wheel 200 is also an inclined straight line; when the profile of the main shaft profile part 110 is a smooth arc, the profile of the first protrusion 201 on the main shaft grinding wheel 200 is also a smooth arc; when the profile of the auxiliary shaft profile part 120 is an inclined straight line, the profile of the second protrusion 301 on the auxiliary shaft grinding wheel 300 is also an inclined straight line; when the profile of the auxiliary shaft profile portion 120 is a smoothly transiting arc, the profile of the second protrusion 301 on the auxiliary shaft grinding wheel 300 is also a smoothly transiting arc.

In the embodiment of the present invention, the shape of the cross-sectional profile of the main shaft profile portion 110 is the same as the shape of the cross-sectional profile of the auxiliary shaft profile portion 120, and may be an inclined straight line, or may be an arc line in smooth transition, as shown in fig. 5, the shape of the cross-sectional profile of the main shaft profile portion 110 and the shape of the cross-sectional profile of the auxiliary shaft profile portion 120 on the crankshaft 102 of the present embodiment are both inclined straight lines. Alternatively, in another possible embodiment, the shape of the cross-sectional profile of the main shaft profile portion 110 may be an oblique straight line and the shape of the cross-sectional profile of the sub-shaft profile portion 120 may be a smoothly transitioned arc line, or the shape of the cross-sectional profile of the main shaft profile portion 110 may be a smoothly transitioned arc line and the shape of the cross-sectional profile of the sub-shaft profile portion 120 may be an oblique straight line. As long as the contact area between the crankshaft 102 and the main bearing 104 and the auxiliary bearing 106 can be increased when the deflection deformation of the crankshaft 102 occurs, thereby ensuring the normal operation of the oil film between the crankshaft 102 and the main bearing 104 and the auxiliary bearing 106, and achieving the purpose of reducing the abrasion.

Additionally, in other possible embodiments, the top surface profile of the first protrusion 201 is a wavy line, and/or the top surface profile of the second protrusion 301 is a wavy line.

In the process of grinding and forming the main shaft profile 110 and the auxiliary shaft profile 120, the main shaft grinding wheel 200 performs one-time circumferential grinding of the main shaft 1020 and the auxiliary shaft grinding wheel 300 for the auxiliary shaft 1022, that is, both the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 do not need to move along the central axis of the crankshaft with respect to the crankshaft 102 to achieve axial grinding feed. Or, the main shaft profile 110 and the auxiliary shaft profile 120 are obtained by performing a combined grinding of circumferential grinding and axial grinding on the crankshaft 102 by using both the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300, and in the feeding process, first, one circumferential grinding is performed to complete a primary grinding depth on the crankshaft 102, then, both the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 move by a predetermined distance along the central axis of the crankshaft with respect to the crankshaft 102, so as to achieve axial grinding feeding, for example, axial feeding of 1.0mm, of both the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 with respect to the crankshaft 102, then, a second circumferential grinding is performed, and after the second circumferential grinding depth is completed, a second axial grinding feeding is performed, and the circumferential grinding feeding and the axial grinding feeding are sequentially performed alternately.

The crank shaft 102 finished by grinding is assembled and used in the air-conditioning compressor, when the crank shaft 102 deflects during the operation of the compressor, at this time, because the main shaft profile part 110 is arranged on the main shaft part 1020 and the auxiliary shaft profile part 120 is arranged on the auxiliary shaft part 1022, after the deflection of the crank shaft 102, the main shaft profile part 110 is in surface contact with the hole wall of the hole of the main bearing 104, and the auxiliary shaft profile part 110 is in surface contact with the hole wall of the hole of the auxiliary bearing 106, so that the contact areas between the main shaft part 1020 and the main bearing 104 and between the auxiliary shaft part 1022 and the auxiliary bearing 106 are increased, the surface contact ensures the normal operation of oil films between the main shaft profile part 110 and the main bearing 104 and between the auxiliary shaft profile part 120 and the auxiliary bearing 106, and the normal lubrication between the main shaft profile part 110 and the auxiliary shaft profile part 104 and the auxiliary bearing 106 is eliminated (or reduced), The abrasion between the auxiliary shaft profile part 120 and the auxiliary bearing 106 eliminates the stress concentration position of the crankshaft 102 caused by abrasion in the working process, ensures that the crankshaft 102 cannot be broken, and improves the operation reliability of the compressor.

Referring to fig. 5, before the steps of mounting the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 on the cnc grinding machine, a machining position of the main shaft type line part 110 on the main shaft part 1020 and a machining position of the auxiliary shaft type line part 120 on the auxiliary shaft part 1022 are measured and determined on the crankshaft 102, at this time, a finish machining surface, a so-called reference surface, must be selected, on the crankshaft 102, only the stepped surfaces 1025 on both sides of the eccentric part 1024 of the crankshaft 102 are finish machining surfaces, and therefore, one of the stepped surfaces 1025 can be selected as the reference surface, and the stepped surface 1025 shown in fig. 5 is selected as the reference surface, and then the positions of the main shaft part 1020 and the auxiliary shaft part 1022 are measured and determined with the stepped surface 1025 as the reference surface. As shown in fig. 5, when the position of L1 measured from the stepped surface 1025 is the stepped end of the vertical drop in height of the main shaft-shaped wire portion 110 and D1 measured from the stepped end is the starting point, D1 is the length of the main shaft-shaped wire portion 110 in the crankshaft central axis direction of the crankshaft 102, and when the position of L2 measured in the reverse direction from the stepped surface 1025 is the end of the sub shaft-shaped wire portion 120 away from the eccentric portion 1024 and D2 measured from the end, D2 is the length of the sub shaft-shaped wire portion 120 in the crankshaft central axis direction of the crankshaft 102. In this way, when the section profile of the main shaft profile portion 110 and the section profile of the sub shaft profile portion 120 are both inclined straight lines, the taper of the section profile of the main shaft profile portion 110 and the taper of the section profile of the sub shaft profile portion 120 can be calculated.

Further, for setting the grinding parameters of the numerical control centerless grinding machine, the method comprises the following steps: the initial grinding speed between the main spindle grindstone 200 and the main spindle portion 1020 and between the auxiliary spindle grindstone 300 and the auxiliary spindle portion 1022 is controlled by setting the initial rotational speed of the main spindle grindstone 200, the initial rotational speed of the auxiliary spindle grindstone 300, the feed amount by which the main spindle portion 1020 is moved to the main spindle grindstone 200 and the auxiliary spindle grindstone 300 to achieve feeding, and the rotational speed of the guide wheel.

In the embodiment of the present invention, in the grinding process, the initial rotational speed of the grinding wheel of the spindle grinding wheel 200 is set to be 500rpm to 2000rpm, and the initial rotational speed of the grinding wheel of the auxiliary spindle grinding wheel 300 is set to be 500rpm to 2000rpm, that is, the initial rotational speeds of the grinding wheel of the spindle grinding wheel 200 and the auxiliary spindle grinding wheel 300 are both set to be 500rpm to 2000 rpm. The grinding feed amount of the main shaft grinding wheel 200 relative to the main shaft part 1020 is set to be between 4mm and 10mm, and the grinding feed amount of the secondary shaft grinding wheel 300 relative to the secondary shaft part 1022 is also between 4mm and 10mm (because the guide wheel drives the whole crankshaft 102 to synchronously feed the main shaft grinding wheel 200 and the secondary shaft grinding wheel 300), that is, the grinding feed amount of the main shaft grinding wheel 200 relative to the main shaft part 1020 and the secondary shaft grinding wheel 300 relative to the secondary shaft part 1022 is both between 4mm and 10 mm. The initial grinding speed between the grinding spindle 200 and the spindle part 1020 is set to be 5rpm to 50rpm, and the initial grinding speed between the grinding spindle 300 and the auxiliary spindle part 1022 is set to be 5rpm to 50rpm, that is, the rotation speed of the guide wheel is set to be 5rpm to 50 rpm. Further, the step of setting the grinding feed amount of the main shaft grinding wheel 200 relative to the main shaft portion 1020 and the grinding feed amount of the auxiliary shaft grinding wheel 300 relative to the auxiliary shaft portion 1022 includes a rough grinding feed speed setting and a finish grinding feed speed setting, wherein the rough grinding feed speed is between 0.5mm/min and 2.0mm/min, and the finish grinding feed speed is between 0.1mm/min and 1.0 mm/min. According to the precision requirement of the air conditioner compressor on the crankshaft 102, the grinding processing parameters of the numerical control centerless grinding machine are set in a targeted manner, so that the processing precision of the main shaft type line part 110 and the auxiliary shaft type line part 120 of the crankshaft 102 which are produced in a batch mode is guaranteed, and the rejection rate is reduced.

In the batch crankshaft production manufacturing process of the same batch, after the same main shaft grinding wheel 200 and the same auxiliary shaft grinding wheel 300 are subjected to long-time grinding processing, the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 both have large abrasion loss, and the abrasion loss has already generated an influence on the processing accuracy of the main shaft type line portion 110 and the auxiliary shaft type line portion 120 of the crankshaft 102, but even if the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 are abraded to reduce the grinding processing accuracy, the ground step that the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 need to be scrapped is far not reached, so a method for performing parameter compensation on the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 in the grinding processing process is adopted, and the grinding processing accuracy of the main shaft type line portion 110 and the auxiliary shaft type line portion 120 obtained by grinding processing is ensured.

Specifically, the parameter compensation of the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 in the grinding process comprises the following steps: setting parameters of a grinding wheel dressing period, namely, performing one parameter compensation adjustment on the main shaft grinding wheel 200 after how many main shaft line portions 110 are ground and processed by the main shaft grinding wheel 200, and performing one parameter compensation adjustment on the auxiliary shaft grinding wheel 300 after how many auxiliary shaft line portions 120 are ground and processed by the auxiliary shaft grinding wheel 300; the parameter compensation setting of the grinding wheel dressing rotating speed is that after the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 are worn, under the condition that the rotating speed of the main shaft grinding wheel 200 is maintained and the rotating speed of the auxiliary shaft grinding wheel 300 is maintained, the workload of grinding the crankshaft 102 by the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 in the same time is actually reduced, so that the rotating speeds of the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 need to be directly or indirectly increased to achieve the purpose of compensation; after the main grinding wheel 200 and the auxiliary grinding wheel 300 are worn, the wheel radii of the main grinding wheel 200 and the auxiliary grinding wheel 300 are reduced, and obviously, the precision of the main shaft profile 110 and the precision of the auxiliary shaft profile 120, which are formed by grinding and processing by using the initially set feeding amount, do not meet the precision requirement any more, so that the grinding wheel dressing radii of the main grinding wheel 200 and the auxiliary grinding wheel 300 need to be compensated, that is, the grinding wheel dressing radius compensation amounts of the main grinding wheel 200 and the auxiliary grinding wheel 300 are respectively set.

In the embodiment of the present invention, the grinding wheel dressing cycles of the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 are set to be between 50 and 1000. The grinding wheel dressing rotating speed of the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 and the grinding wheel dressing radius compensation amount of the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 are compensated and adjusted through a grinding wheel dresser of a numerical control centerless grinding machine, in the setting process of actual parameter compensation, the compensation and adjustment of the grinding wheel dressing rotating speed of the main shaft grinding wheel 200 are carried out, the transverse cutting reciprocating speed of a main shaft of the grinding wheel dresser is set to be between 100mm/min and 500mm/min, the compensation and adjustment of the grinding wheel dressing rotating speed of the auxiliary shaft grinding wheel 300 are carried out, the transverse cutting reciprocating speed of an auxiliary shaft of the grinding wheel dresser is set to be between 50mm/min and 200mm/min, the compensation and adjustment of the grinding wheel dressing radius compensation amount of the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 are carried out, and the transverse cutting amount of the grinding wheel dresser is set to be between 0.01mm and 0.05 mm. The precision of the main shaft type line part 110 and the auxiliary shaft type line part 120 of the crank shaft 102 formed by grinding is ensured by performing wear compensation on the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300, and even if errors still exist in the machining after the compensation is performed on the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300, the machining errors can be effectively controlled by compensating the main shaft grinding wheel 200 and the auxiliary shaft grinding wheel 300 within a tolerance range, and the use precision requirement of the crank shaft 102 is met.

Referring to fig. 6, a roundness measuring instrument is used to perform a roundness detection on the ground crankshaft 102 once to obtain detection data, and it is determined whether the roundness of the main shaft type line portion 110 and the auxiliary shaft type line portion 120 formed by grinding in the crankshaft 102 is qualified or not according to the detection data, since the roundness precision of the crankshaft 102 of the air-conditioning compressor is required to be in the millimeter level, and the grinding precision can reach more than 0.1mm, the detection data obtained by performing a roundness measurement on the ground crankshaft 102 only once can meet the precision determination requirement. Alternatively, in order to accurately measure the roundness of the ground crankshaft 102, as shown in fig. 6, the ground crankshaft 102 is subjected to multiple roundness detections by a roundness measuring machine to obtain multiple sets of detection data, and whether the roundness of the main shaft type line portion 110 and the auxiliary shaft type line portion 120 ground and formed in the crankshaft 102 is acceptable or not is determined based on the multiple sets of detection data. Detecting and judging whether the crankshaft 102 subjected to grinding processing is qualified, packaging the qualified crankshaft 102, boxing and transporting the qualified crankshaft 102 to a compressor assembly workshop for assembling and forming the compressor; and (4) detecting and judging whether the crankshaft 102 finished by grinding is unqualified, and then treating the unqualified crankshaft 102 as waste.

In the process of performing roundness detection on the main shaft profile 110 and the auxiliary shaft profile 120 of the crankshaft 102, which are ground and machined, by using a roundness measuring instrument, firstly, the crankshaft 102 is clamped and stabilized on the roundness measuring instrument, that is, two ends of the crankshaft 102 are respectively clamped and fixed at two opposite clamping positions of the roundness measuring instrument, and since the two clamping positions of the roundness measuring instrument can directly determine the crankshaft middle axis of the crankshaft 102 after the crankshaft 102 is clamped and fixed, excessive positioning adjustment operation on the crankshaft 102 is not required, then, a probe of the roundness measuring instrument is slowly close to the shaft body of the main shaft 1020 or the auxiliary shaft 1022 of the crankshaft 102, and finally, the needle of the probe of the roundness measuring instrument is in contact with the shaft body (but the needle of the probe does not have mutual acting force with the shaft body, so as to avoid the needle of the probe from scratching the shaft body of the crankshaft 102 during movement detection), then, the needle of the probe is moved along the extension direction of the crankshaft middle axis of the crankshaft 102, and the moving track line of the needle head of the probe is recorded, so that the depth distance of the height fluctuation change of the needle head of the probe at the position of the main shaft type line part 110 and the depth distance of the height spoof change at the position of the auxiliary shaft type line part 120 are measured, and whether the roundness of the main shaft type line part 110 and the auxiliary shaft type line part 120 of the crankshaft 102 meets the precision requirement or not is detected.

As shown in fig. 6, a movement track of the probe when the probe of the roundness measuring apparatus measures the roundness of the main shaft profile part 110 on the main shaft part 1020 is shown in the positive quadrant, where fig. 6 shows an example where the profile of the cross section of the main shaft profile part 110 is an inclined straight line, a line segment from a point a to a point B in fig. 6 is a movement track of the probe on the main shaft profile part 110, a line segment from a horizontal axis to a point a is a movement track of the probe on a section of the main shaft part 1020 near the eccentric part 1024, a height vertical drop of the profile is from a point B to a point C, and a line segment after the point C shows a movement track of the probe on a section of the main shaft part 1020 far from the eccentric part 1024. Accordingly, fig. 6 shows a moving track of the probe when the probe of the roundness measuring instrument measures the roundness of the auxiliary shaft profile portion 120 on the auxiliary shaft portion 1022, where fig. 6 shows an example where the profile of the cross section of the auxiliary shaft profile portion 120 is an inclined straight line, a line segment from a point C 'to a point B' in fig. 6 is the moving track of the probe on the auxiliary shaft profile portion 120, a height vertical drop of the profile is from the point a 'to the point B', a moving track from a horizontal axis to the point a 'is the moving track of the probe on a section of the auxiliary shaft portion 1022 close to the eccentric portion 1024, and a line segment extending from the point C' in a direction away from the horizontal axis is the moving track of the probe on a section of the auxiliary shaft portion 1022 far from the eccentric portion 1024.

As shown in fig. 8, a grinding wheel according to a second embodiment of the present invention provides a grinding wheel in which a grinding wheel protrusion 520 includes a protrusion base 521 and a grinding processing portion 522, and the grinding processing portion 522 is supported by the protrusion base 521 and is connected to an outer wall of a wheel body 510. In the second embodiment, the grinding wheel body 510, the raised base 521 and the grinding portion 522 are integrally formed by the same material, i.e., directly machined and ground by using a single piece of sand and stone material. In the grinding wheel of the second embodiment, the width of the grinding projections 520 in the axial direction of the center axis of the wheel body 510 is set so as to gradually decrease from the top surface of the grinding portion 522 toward the wheel body 510 (the width of the wheel body 510 is the largest); alternatively, when the width of the grindstone wheel body 510 in the axial direction of the center axis is S1, the width of the projecting base 521 is S2, and the width of the grinding portion 522 is S3, S1 > S3 ≧ S2.

Compared with the grinding wheel of the first embodiment, the grinding wheel of the second embodiment has the same structure except for the above structure, and the description thereof is omitted.

As shown in fig. 9 and 10, a grinding wheel according to a third embodiment of the present invention is a divided type connection structure in which a wheel body 510, a raised base 521 and a grinding processing portion 522 are formed, that is, the wheel body 510, the raised base 521 and the grinding processing portion 522 are separately and independently processed, and then the wheel body 510, the raised base 521 and the grinding processing portion 522 are assembled. The grinding wheel body 510, the raised base 521 and the grinding portion 522 are made of three different hard materials, wherein the grinding portion 522 is made of a sand material, the grinding wheel body 510 may be made of a rubber material having a desired hardness, or may be made of a metal material, and the raised base 521 may be made of a rubber material having a desired hardness, or may be made of a metal material. In the grinding wheel of the third embodiment, when the width of the wheel body is S1, the width of the projecting base 521 is S2, and the width of the grinding work portion 522 is S3 in the central axial direction of the wheel body 510, S1 > S3 ≧ S2.

The grinding wheel of the third embodiment is identical to the grinding wheel of the second embodiment except for the above-described differences in structure, and the description thereof is omitted.

According to another aspect of the utility model, a grinding machine is provided, this grinding machine goes up to assemble and uses as aforementioned grinding emery wheel to grind the shaping air condition compressor bent axle, for example assemble the numerical control centerless grinder who has used as aforementioned grinding emery wheel.

Explanation:

centerless grinding machine: the grinding machine is a grinding machine which does not need to adopt the shaft core positioning of a workpiece for grinding and mainly comprises a grinding wheel, an adjusting wheel and a workpiece support, wherein the grinding wheel actually plays a role in grinding, the adjusting wheel controls the rotation of the workpiece and controls the feed speed of the workpiece, and the workpiece support is used for supporting the workpiece during grinding. That is, correspond to the utility model discloses numerical control centerless grinding machine that uses, at first the utility model provides a realize automated control's grinding machine through numerical control, secondly, main shaft emery wheel 200 and countershaft emery wheel 300 correspond the grinding emery wheel in the component of centerless grinding machine to the guide wheel of numerical control centerless grinding machine carries out clamping location to the bent axle and adjusts wheel and work support in this part corresponds the component of centerless grinding machine.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A grinding wheel, characterized by comprising a wheel body (510) and a grinding bulge (520) arranged on the outer wall of the wheel body (510) circumferentially around the central axis of the wheel body (510), wherein the top surface profile of the grinding bulge (520) is inclined relative to the central axis of the wheel body (510).

2. A grinding wheel according to claim 1, characterized in that the profile of the top surface of the grinding protuberances (520) is rectilinear.

3. The grinding wheel according to claim 1, characterized in that the profile of the top surface of the grinding protuberances (520) is a curve of predetermined shape.

4. A grinding wheel according to claim 3, characterized in that the profile of the top surface of the grinding protuberance (520) is an arc projecting away from the central axis of the wheel body (510).

5. A grinding wheel according to claim 3, characterized in that the profile of the top surface of the grinding protuberances (520) is a wavy line.

6. The grinding wheel according to any of claims 1 to 5, characterized in that the grinding protuberances (520) comprise a protuberance base (521) and a grinding process (522), the grinding process (522) being supported by the protuberance base (521) for connection to the outer wall of the wheel body (510).

7. The grinding wheel according to claim 6, wherein the width of the wheel body (510) in the extending direction of the center axis of the wheel body (510) is S1, the width of the raised base (521) is S2, and the width of the grinding process portion (522) is S3, then S1 > S3 ≧ S2.

8. The grinding wheel of claim 7, wherein the wheel body (510), the raised base (521) and the grinding process (522) are of unitary construction.

9. The grinding wheel according to claim 7, wherein the wheel body (510), the raised base (521) and the grinding process portion (522) are of a split-type connected structure, and are made of different hard materials.

10. A grinding machine comprising a grinding wheel according to any one of claims 1 to 9.

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