Vertical numerical control milling machine for mechanical industry

Abstract

The invention relates to a vertical numerical control milling machine for the mechanical industry, and belongs to the technical field of numerical control milling machines. A through hole is formed in a bearing seat of a shell, a range finder is arranged at the through hole, and light of the range finder penetrates through a strip-shaped hole of a middle backing ring to directly shoot the peripheral surface of a main shaft; the two range finders measure the distances between the range finders and the peripheral surface of the main shaft from different angles, whether the main shaft deviates or not is judged according to distance changes, when deviation occurs, the main shaft is cooled through the cooling component, and whether the distance value changes or not is judged. And the outer shell bearing seat is used for judging whether the offset is thermal offset generated by excessive heat or offset generated by bearing abrasion, the outer shell bearing seat is rotationally connected with the upper fixed outer shell, and the range finder is debugged in the machine tool body.

Description

Technical Field

[0001] The invention belongs to the technical field of numerically controlled milling machines, and in particular relates to a vertical numerically controlled milling machine for the mechanical industry. Background Art

[0002] CNC machine tools are digitally controlled machine tools, which are automated machine tools equipped with a program control system. The control system can logically process programs specified by control codes or other symbolic instructions, decode them, express them in coded numbers, and input them into the CNC device through information carriers. After calculation and processing, various control signals are sent by the CNC device to control the movement of the machine tool, and automatically process the parts according to the shape and size required by the drawing. The accuracy of the processed workpiece is closely related to the milling path and the stability of the spindle. The spindle stability determines the roundness and cylindricity tolerance, coaxiality and verticality errors, and dimensional accuracy of the workpiece. During the milling process, the spindle often deviates due to long-term milling work, which leads to stress concentration in some areas of the bearing, resulting in greater wear in this area than in other areas, thereby causing radial deviation of the spindle. In order to be able to discover this problem more promptly, this solution was created in view of this. Summary of the invention

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a vertical CNC milling machine for the mechanical industry, which can timely warn of possible spindle deviation and determine whether the deviation is caused by bearing wear.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a vertical CNC milling machine for mechanical industry, including a shell bearing seat, a front bearing, a rear bearing, a middle gasket ring, a spindle, a lower cover, a tool, a verticality detection component and a cooling component, the shell bearing seat has a first mounting hole that runs through the upper and lower parts, a limiting ring platform is formed in the first mounting hole, the rear bearing, the middle gasket ring and the front bearing are arranged above the limiting ring platform in sequence from bottom to top, the spindle is arranged in the first mounting hole and passes through the rear bearing, the middle gasket ring and the front bearing, and the lower cover is used to close the first mounting hole. A mounting hole is opened below, a gap is formed between the inner circumference of the middle gasket ring and the main shaft, at least two strip holes are arranged on the surface of the middle gasket ring, and the angle between the horizontal extension lines of the centers of the two strip holes coinciding with the axis of the main shaft is 30°-120°; a through hole adapted to the strip hole is formed on the housing bearing seat, the verticality detection component includes a rangefinder, the rangefinder is installed in the through hole and the ranging light passes through the strip hole to the outer circumference of the main shaft, the tool is installed at the lower end of the main shaft, and the cooling component is used to cool the main shaft and the front and rear bearings.

[0005] Furthermore, there are two front bearings, and the other front bearing is installed between the limiting ring and the lower cover.

[0006] Furthermore, the rangefinder includes a base, a light source transmitter, a control mainboard and a light source angle adjustment member, the control mainboard is integrated in the base, the light source transmitter is arranged on the base, and the light source angle adjustment member is used to adjust the emission angle of the light source transmitter.

[0007] Furthermore, a second mounting hole is formed on the surface of the base which passes through the front and back, and the light source emitter includes a shell and a light source emitting body, and the light source emitting body is installed on the shell, and a boss is provided on the outward side of the shell, and the outward side of the boss is an arc surface, and a first external tooth is provided on the arc surface, and both sides of the boss are hinged to the inner side wall of the second mounting hole, and the axis of the hinge coincides with the axis of the arc surface of the boss, and the light source angle adjustment member includes a rotating wheel, which is hinged in the second mounting hole and extends out of the second mounting hole, and the surface of the rotating wheel is provided with second external teeth, and the first external teeth are meshed with the second external teeth.

[0008] Furthermore, the light source angle adjustment member also includes a limiting shell, which has an arc-shaped groove, in which a first inner tooth is arranged, the arc-shaped groove is adapted to the rotating wheel, the first inner tooth is meshed with the second outer tooth, and the limiting shell is detachably connected to the outer surface of the base.

[0009] Furthermore, a clearance gap is provided on the inner side of the base, and the light source emitter includes a shell and a light source emitting body, and the light source emitting body is installed on the shell, and a boss is provided on the outward side of the shell, and the outward side of the boss is an arc surface, and a first external tooth is provided on the arc surface, and the two sides of the boss are hinged to the inner side wall of the clearance gap, and the axis of the hinge coincides with the axis of the arc surface of the boss, and an oblique hole is provided on the outward side of the base, and the oblique hole is inclined from left to right and from bottom to top, and the oblique hole passes through the clearance gap and extends into the upper side wall of the clearance gap, and the light source angle adjustment member includes a rotating worm, which is rotatably connected and stuck in the oblique hole, and the outer peripheral surface of the rotating worm located in the clearance gap is formed with a thread, and the thread is meshed with the second external tooth.

[0010] Furthermore, the light source angle adjustment member also includes a counter screw, a threaded hole is provided on the outward side of the base, the axis of the threaded hole is perpendicular to the axis of the oblique hole, the counter screw is provided in the threaded hole, and the counter screw is used to counter the circumference of the rotating worm.

[0011] Furthermore, the number of the strip holes is 4, and the 4 strip holes are arranged in a ring-shaped manner along the axis of the main shaft, and the number of the through holes and the number of the rangefinders are adapted to the strip holes.

[0012] A spindle offset detection method for a vertical CNC milling machine for mechanical industry is used to detect the spindle offset in a vertical CNC milling machine for mechanical industry, comprising the following steps: S1. Install and debug the distance meters one by one so that the irradiation light is parallel to the horizontal plane and shines on the outer peripheral surface of the spindle; S2. After adjustment, the distance from the main axis measured by the distance meter is set to 0; S3, recording the values ​​of the two rangefinders in real time and generating a line graph; S4. When the value measured by the distance meter is greater than 5 microns and lasts for more than 5 seconds, determine whether the deviation is caused by bearing wear; S41. When the value measured by the rangefinder is greater than 5 microns and lasts for more than 5s, increase the cooling efficiency of the cooling component, and the value measured by the rangefinder drops below 5 microns, and the spindle is normal; when the value measured by the rangefinder is greater than 5 microns and lasts for 5s, increase the cooling efficiency of the cooling component, and the value measured by the rangefinder remains unchanged, and the spindle is abnormal.

[0013] Furthermore, the specific steps in step S1 and step S2 are as follows: install the base into the through hole, turn on the light source emitter to direct its light source toward the periphery of the main shaft and record the value, turn the light source angle adjustment member to obtain multiple values, take the lowest value, turn the light source angle adjustment member until the distance between the light source emitted by the light source emitter and the outer peripheral surface of the main shaft reaches the lowest value, and then adjust the value to 0.

[0014] Furthermore, during the installation process of step S1 and step S2, when multiple rangefinders are installed, after one rangefinder is installed, the next rangefinder is installed by synchronously rotating the housing bearing seat and the middle gasket ring.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The invention provides a vertical CNC milling machine for mechanical industry. A through hole is opened on a housing bearing seat in a milling chamber, and a distance meter is arranged at the through hole. Light from the distance meter passes through a strip hole of a middle cushion ring and directly irradiates an outer peripheral surface of a main shaft. During the rotation of the main shaft, two distance meters respectively measure the distance between the distance meter and the outer peripheral surface of the main shaft from different angles. Whether the main shaft is offset is judged by the change of the distance. When the offset occurs, the main shaft is cooled by a cooling component to see whether the distance value changes, so as to judge whether the offset is a thermal offset caused by excessive heat or an offset caused by bearing wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a three-dimensional structure of a vertical CNC milling machine for mechanical industry; Figure 2 It is a three-dimensional structural schematic diagram of the housing bearing seat, the upper fixed housing and the cutter in the present invention; Figure 3 It is a schematic cross-sectional structure diagram of the housing bearing seat, the upper fixed housing and the cutter in the present invention; Figure 4It is a three-dimensional structural schematic diagram of the housing bearing seat in the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the lower sleeve in the present invention; Figure 6 It is a schematic diagram of a horizontal cross-sectional structure of the connection position between the convex ring and the housing bearing seat in the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure inside the housing bearing seat of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the verticality detection component in Example 1 of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the verticality detection component in Embodiment 1 of the present invention from another angle; Fig.10 It is a cross-sectional structural schematic diagram of the verticality detection assembly in Example 1 of the present invention; Fig.11 A schematic cross-sectional view of a verticality detection assembly in Example 1 of the present invention provided with a limit housing; Fig.12 Schematic diagram of the three-dimensional structure of the verticality detection assembly in Example 2 of the present invention; Fig.13 It is a cross-sectional structural schematic diagram of the verticality detection assembly in Example 2 of the present invention; Fig.14 A schematic cross-sectional view of a verticality detection assembly in Example 2 of the present invention provided with a counter screw; Fig.15 It is a displacement-time line graph of two distance meters arranged opposite to each other when the main axis is normal in the present invention; Fig.16 It is a displacement-time line graph of two distance meters arranged opposite to each other when the main shaft undergoes thermal offset in the present invention; Fig.17 A displacement-time line graph of two distance meters disposed opposite to each other under the condition of bearing wear in the present invention; Fig.18 It is a displacement-time line graph of two distance meters arranged opposite to each other in the case where the bearing may be worn in the present invention.

[0017] Markings in the figure: 1. shell bearing seat; 11. through hole; 111. limiting groove; 12. sliding hole; 13. second screw hole; 2. front bearing; 3. rear bearing; 4. middle gasket; 41. gap; 42. strip hole; 5. spindle; 6. lower cover; 7. tool; 8. verticality detection component; 81. base; 811. second mounting hole; 812. convex ring; 813. clearance gap; 82. light source emitter; 821. shell; 822. boss; 823. light source emitting body; 83. control main board; 84. light source angle adjustment member; 841. rotating wheel; 8411. limiting shell; 842. rotating worm; 8421. top screw; 9. machine tool body; 91. clamping seat; 92. upper fixed shell; 921. convex sleeve; 9211. first screw hole; 9212. insertion hole; 9213. insertion block. DETAILED DESCRIPTION

[0018] In order to make the above features and advantages of the present invention more obvious and easy to understand, embodiments are given below with reference to the accompanying drawings for detailed description as follows.

[0019] Example 1 like Figure 1-Figure 11 As shown, this embodiment provides a vertical CNC milling machine for mechanical industry, including a machine tool body 9, a clamping seat 91, a drive assembly, an upper fixed shell 92, a shell bearing seat 1, two front bearings 2, a rear bearing 3, a middle gasket 4, a spindle 5, a lower cover 6, a tool 7, a verticality detection assembly 8 and a cooling component.

[0020] The machine tool body 9 has a milling chamber, and a clamping seat 91 is arranged at the bottom of the milling chamber. The clamping seat 91 adopts the existing three-claw or four-claw clamping seat 91, and a three-axis drive assembly is arranged under the clamping seat 91. The three-axis drive assembly is used for the clamping seat 91 to perform three-axis movement of the X, Y and Z axes. The three-axis drive assembly and the clamping seat 91 both adopt the existing structure, which will not be repeated here.

[0021] The drive assembly is installed on the top of the milling chamber. The drive assembly is used to drive the spindle 5 to rotate. The drive assembly adopts the existing structure and will not be described in detail here. The upper fixed shell 92 is sleeved on the outside of the drive assembly; the shell bearing seat is set below the upper fixed shell 92 and can rotate around the axis of the upper fixed shell 92. During the adjustment stage of the verticality detection assembly 8, one of the two rangefinders on the verticality detection assembly 8 may be located in a position that is difficult to adjust. Therefore, by setting the shell bearing seat, it can rotate around the axis of the upper fixed shell 92, so that the rangefinder that is difficult to adjust can be moved to a position that is easy to adjust for adjustment.

[0022] Specifically, the upper fixed shell 92 includes a cylinder and a lower sleeve seat, the lower sleeve seat can be detachably connected to the bottom of the cylinder, a convex sleeve 921 is formed on the lower surface of the lower sleeve seat, the inner diameter of the convex sleeve 921 is matched with the outer diameter of the shell bearing seat, the convex sleeve 921 is sleeved on the upper end of the shell bearing seat, and two mirror-set insertion holes 9212 are formed on the surface of the convex sleeve 921. The upper end side wall of the shell bearing seat is formed with two long strip sliding holes 12. The angle formed between the two sides of the sliding hole and the axis of the shell bearing seat is 60°-120°, and 90° is used in this embodiment. The insertion hole 9212 of the convex sleeve 921 is provided with an insertion block 9213, and the insertion block 9213 passes through the insertion hole 9212 and extends into the sliding hole. The insertion block 9213 can be used to limit the rotation angle of the shell bearing seat.

[0023] Preferably, if Figure 6 As shown, the side wall of the convex sleeve 921 is provided with two mirror-imaged first screw holes 9211, and the upper side wall of the housing bearing seat is provided with a second screw hole 13 corresponding to the first screw hole 9211. After the adjustment of the rangefinder is completed, the housing bearing seat is rotated counterclockwise to the bottom, so that when the extension block 9213 is in contact with one side of the sliding hole 12, the first screw hole 9211 and the second screw hole 13 correspond to each other, and then the screws are screwed in to fix the convex sleeve 921 and the housing bearing seat.

[0024] The housing bearing seat 1 has a first mounting hole that passes through from top to bottom, and a limiting ring is formed in the first mounting hole. The rear bearing 3, the middle gasket 4 and one of the front bearings 2 are arranged above the limiting ring in sequence from bottom to top. The main shaft 5 is arranged in the first mounting hole and passes through the rear bearing 3, the middle gasket 4 and the front bearing 2. The lower cover 6 is used to close the lower opening of the first mounting hole. Specifically, the other front bearing 2 is installed between the limiting ring and the lower cover 6. The tool 7 is installed at the lower end of the main shaft 5. The cooling component is used to cool the main shaft 5 and the front and rear bearings 3. The cooling component adopts the cooling component commonly used in the existing machine tool spindle, which will not be repeated here.

[0025] A gap 41 is formed between the inner circumference of the middle gasket ring 4 and the main shaft 5. Four strip holes 42 are arranged on the surface of the middle gasket ring 4. The four strip holes 42 are arranged in a ring shape along the axis of the main shaft 5. Four through holes 11 that are compatible with the strip holes 42 are formed on the housing bearing seat 1. Specifically, the through hole 11 is in a strip shape, and the two ends of the through hole 11 are semicircular. An outward-extending limiting groove 111 is formed at the outward opening of the through hole 11.

[0026] Preferably, the width and length of the strip hole 42 are greater than the width and length of the through hole 11, so that after the rangefinder is installed, the laser can be injected without precise alignment to be applicable to the rangefinder, and the installation is easier.

[0027] The verticality detection component 8 includes four rangefinders, which are arranged opposite to each other in pairs. The two rangefinders arranged opposite to each other form a group for data comparison. The two groups of opposite rangefinders are arranged in order to be able to comprehensively monitor the radial deviation of the main shaft 5. No matter which direction the main shaft 5 is deviated, it can be detected by any group of rangefinders. The rangefinder is installed in the through hole 11 and the ranging light passes through the strip hole 42 and is emitted to the outer peripheral surface of the main shaft 5. The rangefinder includes a base 81, a light source transmitter 82, a control mainboard 83 and a light source angle adjustment member 84. The control mainboard 83 is integrated in the base 81, and the light source transmitter 82 is arranged on the base 81. The light source transmitter 82 can use a transmitter of a high-precision infrared rangefinder or a transmitter of a laser rangefinder. In this solution, a transmitter of a laser rangefinder is selected. The base 81 includes an outer shape that is compatible with the through hole 11. A convex ring 812 is formed on the outer periphery of the outer side of the base 81. The convex ring 812 is compatible with the limiting groove 111, and the convex ring 812 and the limiting groove 111 are fixed by screws.

[0028] The light source angle adjustment member is used to adjust the emission angle of the light source emitter 82. The reason for setting the light source angle adjustment member is that there will be errors in the opening of the through hole 11 and the molding of the base 81. When the error is too large, the base 81 is installed in the through hole 11, and the light emitted by the light source emitter 82 cannot be guaranteed to be 100% horizontal. Therefore, the light angle is adjusted by adjusting the source to achieve a horizontal state. A second mounting hole 811 is formed on the surface of the base 81, which runs through the front and back. The light source emitter 82 includes a shell 821 and a light source emission body 823. The light source emission body 823 is installed on the shell 821. A boss 822 is provided on the outward side of the shell 821. The outward side of the boss 822 is an arc surface, and a first external tooth is provided on the arc surface. The first external teeth are arranged on the full arc surface. The two sides of the boss 822 are hinged to the inner wall of the second mounting hole 811, and the axis of the hinge coincides with the axis of the arc surface of the boss 822. The source angle adjustment member includes a rotating wheel 841, which is hinged in the second mounting hole 811 and extends out of the second mounting hole 811. A second external tooth is arranged on the surface of the rotating wheel 841, and the second external teeth are distributed all over the surface of the rotating wheel 841. The first external teeth and the second external teeth are meshed with each other, and the first external teeth rotate one degree every two grids. The light source emitting body 823 in this scheme can be adjusted within a forward and reverse rotation range of 5°. By turning the rotating wheel 841, the direction of the light source emitting body 823 can be adjusted.

[0029] Since the machining tool will be accompanied by vibration during the actual operation, the vibration may cause the light source emitting body 823 to have an angle deviation (that is, turn up or down), so the light source angle adjustment member 84 of this scheme also includes a limit shell 8411, the limit shell 8411 has an arc groove, a first inner tooth is arranged in the arc groove, the first inner tooth is arranged on the bottom surface of the arc groove, the arc groove is adapted to the rotating wheel 841, the first inner tooth is meshed with the second outer tooth, and the limit shell 8411 is detachably connected to the outer surface of the base 81, specifically, the two are connected by screws. The limit shell 8411 is sleeved on the rotating wheel 841, so that the second outer tooth of the rotating wheel 841 is meshed with the first inner tooth, so that the rotating wheel 841 cannot rotate, and since the first outer tooth and the second outer tooth are also meshed, the boss 822 and the shell 821 can no longer move under the influence of vibration, thereby ensuring the horizontality of the light emitted by the light source emitting body 823.

[0030] This embodiment also provides a method for detecting the spindle offset of a vertical CNC milling machine for mechanical industry, which is used to detect the offset of the spindle 5 in the vertical CNC milling machine for mechanical industry, and includes the following steps: S1. Install and debug the rangefinder so that its irradiation light is parallel to the horizontal plane and shines on the outer peripheral surface of the main shaft 5.

[0031] S2. After the adjustment is completed, the distance from the main axis 5 measured by the distance meter is adjusted to 0.

[0032] The specific steps of the single rangefinder debugging process of steps S1 and S2 are as follows: install the base 81 into the through hole 11, clamp the convex ring 812 into the limiting groove 111, and then tighten it with a screw. At this time, the distance between the emitting end of the light source emitter 82 and the main shaft 5 is 10-15mm. In this embodiment, the distance between the emitting end of the light source emitter 82 and the main shaft 5 is 15mm. Turn on the light source emitter 82 so that its light source is emitted to the periphery of the main shaft 5 and record the value. Turn on the light source angle adjustment member 84 to obtain multiple values ​​(such as 10.4, 10.3, 10.2, 10.1, 10, 9.9, 10, 10.1, etc.), take the lowest value (9.9), turn on the light source angle adjustment member 84 until the distance between the light source emitted by the light source emitter 82 and the outer peripheral surface of the main shaft 5 reaches the lowest value (9.9), and then adjust the value to 0, that is, return to zero setting, and adjust the distance of 9.9 to 0 on the terminal device, so that the offset change of the main shaft 5 can be observed more clearly.

[0033] The specific process of debugging multiple rangefinders in step S1 and step S2 is as follows: when installing multiple rangefinders, after one rangefinder is installed, the next rangefinder is installed by synchronously rotating the housing bearing seat and the middle gasket ring. The specific steps are as follows: at the initial stage of debugging and installation of the machine tool body 9, the drive assembly, the upper fixed housing 92, the housing bearing seat, the front bearing, the rear bearing, the middle gasket ring, the spindle, the lower cover, the verticality detection assembly and the cooling component are all pre-installed inside the machine tool body 9. At this time, the housing bearing seat and the upper fixed housing 92 are fixedly connected by screwing the screws into the first screw hole 9211 and the second screw hole 13 Next, remove the forward rangefinder, unscrew the nuts of the first screw hole 9211 and the second screw hole 13, extend the tool from the through hole into the strip hole through a specific insertion tool, and then push the housing bearing seat counterclockwise to make the housing bearing seat and the middle gasket rotate synchronously, so that the rangefinder facing the inner side of the milling chamber moves to the side. After debugging the above steps, push the housing bearing seat and the middle gasket to rotate clockwise synchronously to reset, and then screw the screws into the first screw hole 9211 and the second screw hole 13 to fix them, and then perform the above-mentioned single rangefinder debugging on the forward rangefinder and the rangefinders on both sides.

[0034] S3. Record the values ​​of the two rangefinders in real time and generate a line graph.

[0035] S4. When the value measured by the distance meter is greater than 5 microns and lasts for 5 seconds, determine whether the deviation is caused by bearing wear.

[0036] S41. When the value measured by the rangefinder is greater than 5 microns and lasts for 5s, the cooling efficiency of the cooling component is increased, and the value measured by the rangefinder is reduced to below 5 microns. Spindle 5 is normal. When the value measured by the rangefinder is greater than 5 microns and lasts for more than 5s, after the cooling efficiency of the cooling component is increased, the value measured by the rangefinder remains unchanged, and spindle 5 is abnormal.

[0037] When the spindle 5 is in normal working condition, the speed is 1000 rpm. Fig.15 As shown, 10 seconds of the working process are captured, and the peak value of the time-distance line graph of any group of two rangefinders set in opposite directions will not exceed 5 microns.

[0038] There is a thermal offset phenomenon, the speed is 6000 rpm, such as Fig.16 As shown: 20 seconds after the thermal offset occurs, the peak value of the time-distance line graph of the two rangefinders set in opposite directions detected to have risen rapidly to exceed 5 microns and lasted for more than 5 seconds. After the intervention of the cooling component (accelerating the cooling cycle), the offset slowly decreased to less than 5 microns.

[0039] In the case of bearing wear, the speed is 1000 rpm, such as Fig.17As shown, the peak value of the time-distance line graph of the two oppositely set rangefinders that detected the offset was greater than 5 microns after startup, and after the intervention of the cooling component, the peak value remained above 5 microns, which means that the bearing is worn and needs to be replaced in time.

[0040] like Fig.18 As shown, at a rotation speed of 1000 rpm, the time-distance line graph of the two offset distance meters set opposite to each other showed intermittent peaks exceeding 5 microns, which were repeated for a long time. The bearings may have been worn, but it does not affect the milling process for the time being. In this case, early warning is required and the processing tools need to be repaired.

[0041] The time-distance line graph of the two distance meters set opposite to each other in this solution adopts a self-set simulation test. In the actual milling process, it may be affected by the vibration frequency and rotation speed of the machine. At high rotation speed, the thermal offset will be greater, and the offset will also be different depending on the processing accuracy of the machine, so it needs to be debugged according to the actual situation.

[0042] Example 2 like Figure 1-Figure 7 and Figure 12-14 As shown, the difference between this embodiment and embodiment 1 is that the structure of the light source angle adjustment member 84 is different, the base 81 is provided with a clearance notch 813 on the inner side, the light source emitter 82 includes a shell 821 and a light source emission body 823, the light source emission body 823 is installed on the shell 821, the shell 821 is provided with a boss 822 on the outer side, the boss 822 is an arc surface on the outer side, and the first external tooth is provided on the arc surface, the two sides of the boss 822 are hinged to the inner side wall of the clearance notch 813, and the axis of the hinge is connected to the arc surface axis of the boss 822 The lines overlap, and an oblique hole is provided on the outward side of the base 81. The oblique hole is inclined from left to right and from bottom to top. The oblique hole passes through the clearance gap 813 and extends into the upper side wall of the clearance gap 813. The light source angle adjustment member includes a rotating worm 842, which is rotatably connected and locked in the oblique hole. The outer peripheral surface of the rotating worm 842 located in the clearance gap 813 is formed with a thread, and the thread is meshed with the second external tooth. By rotating the rotating worm 842, the angle adjustment of the light emitted by the light source emission body 823 is realized.

[0043] Preferably, the end surface of the worm is provided with a slotted groove to facilitate rotation with a slotted screwdriver.

[0044] Since the machining tool will be accompanied by vibration during the actual operation, the vibration may cause the light source emitting body 823 to shift in angle (that is, turn up or down), so the light source angle adjustment member 84 of the present scheme also includes a push-button screw 8421. A threaded hole is provided on the outward side of the base 81, and the axis of the threaded hole is perpendicular to the axis of the oblique hole. The push-button screw 8421 is provided in the threaded hole. The push-button screw 8421 is used to push against the circumference of the rotating worm 842. The push-button screw 8421 pushes against the outer circumference of the non-threaded surface of the rotating worm 842, making it impossible to rotate, thereby ensuring that the light emitted by the light source emitting body 823 will not shift.

[0045] This embodiment provides a method for detecting the deviation of the spindle 5 of a vertical CNC milling machine for the mechanical industry, which is substantially the same as the implementation, except that in step S1 , the angle of the light emitted by the light source emitting body 823 is adjusted by rotating the rotating worm 842 .

[0046] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A vertical CNC milling machine for mechanical industry, characterized in that: It includes a machine tool body, a clamping seat, a driving assembly, an upper fixed housing, a housing bearing seat, a front bearing, a rear bearing, a middle gasket, a spindle, a lower cover, a tool, a verticality detection assembly and a cooling component; The machine tool body is provided with a milling chamber, the clamping seat is arranged at the bottom of the milling chamber, the driving assembly is installed at the top of the milling chamber, the driving assembly is used to drive the spindle to rotate, and the upper fixed shell is sleeved on the outside of the driving assembly; the shell bearing seat is arranged below the upper fixed shell and can rotate around the axis of the upper fixed shell; The housing bearing seat has a first mounting hole that passes through from top to bottom, a limiting ring platform is formed in the first mounting hole, the rear bearing, the middle gasket ring and the front bearing are arranged above the limiting ring platform in sequence from bottom to top, the main shaft is arranged in the first mounting hole and passes through the rear bearing, the middle gasket ring and the front bearing, the lower cover is used to close the lower opening of the first mounting hole, a gap is formed between the inner circumference of the middle gasket ring and the main shaft, at least two strip holes are arranged on the surface of the middle gasket ring, and the angle between the horizontal extension lines of the centers of the two strip holes that coincide with the axis of the main shaft is 30°-120°; a through hole adapted to the strip hole is formed on the housing bearing seat, the verticality detection component includes a rangefinder, the rangefinder is installed in the through hole and the ranging light passes through the strip hole to the outer circumference of the main shaft, the tool is installed at the lower end of the main shaft, and the cooling component is used to cool the main shaft and the front and rear bearings.

2. A vertical CNC milling machine for mechanical industry according to claim 1, characterized in that: The rangefinder comprises a base, a light source transmitter, a control mainboard and a light source angle adjustment member, wherein the control mainboard is integrated in the base, the light source transmitter is arranged on the base, and the light source angle adjustment member is used to adjust the emission angle of the light source transmitter.

3. A vertical CNC milling machine for mechanical industry according to claim 2, characterized in that: A second mounting hole is formed on the surface of the base extending through the front and back. The light source emitter includes a shell and a light source emitting body, and the light source emitting body is installed on the shell. A boss is provided on the outward side of the shell, and the outward side of the boss is an arc surface, and a first external tooth is provided on the arc surface. Both sides of the boss are hinged to the inner side wall of the second mounting hole, and the axis of the hinge coincides with the axis of the arc surface of the boss. The light source angle adjustment member includes a rotating wheel, which is hinged in the second mounting hole and extends out of the second mounting hole. Second external teeth are provided on the surface of the rotating wheel, and the first external teeth and the second external teeth are meshed with each other.

4. A vertical CNC milling machine for mechanical industry according to claim 3, characterized in that: The light source angle adjustment member also includes a limiting shell, which has an arc-shaped groove, in which a first inner tooth is arranged, the arc-shaped groove is adapted to the rotating wheel, the first inner tooth is meshed with the second outer tooth, and the limiting shell is detachably connected to the outer surface of the base.

5. A vertical CNC milling machine for mechanical industry according to claim 2, characterized in that: The base is provided with a clearance gap on the inner side, the light source emitter includes a shell and a light source emitting body, the light source emitting body is installed on the shell, the shell is provided with a boss on the outer side, the boss is an arc surface on the outer side, and a first external tooth is provided on the arc surface, the two sides of the boss are hinged to the inner side wall of the clearance gap, and the axis of the hinge coincides with the axis of the arc surface of the boss, the base is provided with an oblique hole on the outer side, the oblique hole is inclined from left to right and from bottom to top, the oblique hole passes through the clearance gap and extends into the upper side wall of the clearance gap, the light source angle adjustment member includes a rotating worm, the rotating worm is rotatably connected and stuck in the oblique hole, the outer peripheral surface of the rotating worm located in the clearance gap is formed with a thread, and the thread is meshed with the second external tooth.

6. A vertical CNC milling machine for mechanical industry according to claim 5, characterized in that: The light source angle adjustment member also includes a counter screw. A threaded hole is provided on the outward side of the base. The axis of the threaded hole is perpendicular to the axis of the oblique hole. The counter screw is arranged in the threaded hole and is used to counter the circumference of the rotating worm.

7. A vertical CNC milling machine for mechanical industry according to claim 1, characterized in that: The number of the strip holes is 4, and the 4 strip holes are arranged in a ring-shaped manner along the axis of the main shaft. The number of the through holes and the number of the rangefinders are adapted to the strip holes.

8. A vertical CNC milling machine for mechanical industry according to any one of claims 1 to 7, characterized in that: According to the vertical CNC milling machine for mechanical industry, a method for detecting spindle offset of the milling machine is provided, comprising the following steps: S1. Install and debug the distance meters one by one so that the irradiation light is parallel to the horizontal plane and shines on the outer peripheral surface of the spindle; S2. After adjustment, the distance from the main axis measured by the distance meter is set to 0; S3, recording the values ​​of the two rangefinders in real time and generating a line graph; S4. When the value measured by the distance meter is greater than 5 microns and lasts for more than 5 seconds, determine whether the deviation is caused by bearing wear; S41. When the value measured by the rangefinder is greater than 5 microns and lasts for more than 5s, increase the cooling efficiency of the cooling component, and the value measured by the rangefinder drops below 5 microns, and the spindle is normal; when the value measured by the rangefinder is greater than 5 microns and lasts for 5s, increase the cooling efficiency of the cooling component, and the value measured by the rangefinder remains unchanged, and the spindle is abnormal.

9. A vertical CNC milling machine for mechanical industry according to claim 8, characterized in that: The specific steps in step S1 and step S2 are as follows: install the base into the through hole, turn on the light source emitter to emit its light source toward the periphery of the main shaft and record the value, turn the light source angle adjustment member to obtain multiple values, take the lowest value, turn the light source angle adjustment member until the distance between the light source emitted by the light source emitter and the outer peripheral surface of the main shaft reaches the lowest value, and then adjust the value to 0.

10. A vertical CNC milling machine for mechanical industry according to claim 8, characterized in that: During the installation process of step S1 and step S2, when multiple distance meters are installed, after one distance meter is installed, the next distance meter is installed by synchronously rotating the housing bearing seat and the middle gasket ring.

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