Linear rail grinding machine

Abstract

The present invention provides a linear rail grinder, comprising: an X-axis driving member installed on a bed, used to drive the linear rail to translate along the X-axis; a top grinding assembly is used to grind the top surface corners of the linear rail, and the first YZ-axis driving member of the top grinding assembly drives the horizontal grinding wheel to move toward the linear rail until it contacts the top surface corners of the linear rail; a side grinding assembly is used to grind the left or right side of the linear rail, and the second Y-axis driving member of the side grinding assembly drives the side grinding wheel to move toward the linear rail until it contacts the side of the linear rail; a surface grinding assembly is used to grind the top plane of the linear rail, and the third Z-axis driving member of the surface grinding assembly drives the surface grinding wheel downward until it contacts the top surface of the linear rail. The present invention has high grinding efficiency and grinding precision for the linear rail.

Description

Technical Field

[0001] The invention belongs to the technical field of grinders, and in particular relates to a linear rail grinder. Background Art

[0002] Linear rails are linear guides, which are used to support and guide moving parts to perform reciprocating linear motion in a given direction. They are used in situations where high-precision linear reciprocating motion is required, and can withstand a certain torque.

[0003] Due to the high-precision guiding characteristics of the linear rail, the surface of the linear rail needs to be precisely ground after the linear rail is processed to ensure its guiding accuracy. Existing linear rail grinders are step-by-step processing, which requires multiple handling and positioning of the linear rail, resulting in accumulated positioning errors and difficulty in ensuring processing accuracy. In addition, in order to reduce positioning errors, the linear rail needs to be manually corrected using a dial indicator during its positioning process before grinding. This process is cumbersome and time-consuming, and the positioning accuracy is controlled by the operator's experience and cannot be reliably guaranteed. Summary of the invention

[0004] The purpose of the present invention is to provide a linear rail grinder to solve the problem of low grinding efficiency and grinding precision of the linear rail by the grinder.

[0005] The present invention provides the following technical solutions:

[0006] Linear rail grinding machine, including:

[0007] An X-axis driving member is installed on the bed base and is used to drive the linear rail to translate along the X-axis;

[0008] A top grinding assembly is used for grinding the top edge corner of the linear rail. The top grinding assembly includes a first YZ-axis driving member and a horizontal machine head mounted on the first YZ-axis driving member. A horizontal head grinding wheel is vertically mounted on the horizontal machine head. The first YZ-axis driving member is used to drive the horizontal head grinding wheel to move toward the linear rail until it contacts the top edge corner of the linear rail.

[0009] A side grinding assembly is used for grinding the left side or the right side of the linear rail, the side grinding assembly comprises a second Y-axis driving member and a first vertical head mounted on the second Y-axis driving member, a side grinding wheel is horizontally mounted on the first vertical head, and the second Y-axis driving member is used for driving the side grinding wheel to move toward the linear rail until it contacts the side of the linear rail;

[0010] A surface grinding assembly is used for grinding the top plane of the linear rail. The surface grinding assembly includes a third Z-axis driving member and a second vertical head mounted on the third Z-axis driving member. A surface grinding wheel is horizontally mounted on the second vertical head. The third Z-axis driving member is used to drive the surface grinding wheel downward until it contacts the top surface of the linear rail.

[0011] Furthermore, the X-axis driving component includes an X-axis module and an X-axis linear guide, a workbench is installed on the slider of the X-axis module, and a plurality of guide blocks cooperating with the X-axis linear guide are installed at the bottom of the workbench, and the X-axis driving component is used to drive the workbench to translate along the X-axis; a linear rail seat for supporting the linear rail is installed on the workbench along the X-axis direction, and an array of electromagnets is arranged on the bed directly below the linear rail seat, and the electromagnet group adsorbs the linear rail to the linear rail seat.

[0012] Preferably, a correction block is installed on the horizontal head of the top grinding assembly, a first lifting cylinder is installed on the side grinding assembly on the opposite side of the horizontal head, a translation cylinder is installed on the piston rod of the first lifting cylinder, a rotatable correction wheel is installed on the piston rod of the translation cylinder, and the correction wheel is driven by the translation cylinder to squeeze the linear rail onto the correction block.

[0013] Preferably, the projections of the correction wheel and the correction block on the XY plane are staggered along the X-axis direction, and the angle between the center line of the correction wheel and the correction block and the X-axis is 80-88°.

[0014] Furthermore, a gantry is installed on the bed base, the second Y-axis driving component is installed on the gantry, and side grinding components are respectively installed on the second Y-axis driving component on both sides of the linear rail seat; a vertical machine base is fixedly installed in the middle of the gantry, and a third Z-axis driving component is installed on the vertical machine base just above the linear rail seat.

[0015] Preferably, a grinding wheel assembly is installed on the workbench at the end of the linear rail seat, and the grinding wheel assembly includes a first driving member, a first rotating shaft and a grinding wheel, the first driving member is installed on the wheel seat of the workbench, the first driving member is drivingly connected to the vertically extending first rotating shaft, the grinding wheel is horizontally servo-installed on the first rotating shaft, and the X-axis driving member can move the grinding wheel assembly to below the horizontal head grinding wheel or the plane grinding wheel.

[0016] Furthermore, a vertical front water baffle and a rear water baffle are respectively installed at the front and rear ends of the workbench; dust covers are respectively installed on the bed base at the front side of the front water baffle and the rear side of the rear water baffle, and the two dust covers cover the front and rear ends of the X-axis linear guide.

[0017] Furthermore, the top grinding assembly also includes a cooling pipe and a flushing head installed at the bottom end of the cooling pipe, and the flushing head is provided with a flat liquid outlet, and the liquid outlet faces the horizontal grinding wheel.

[0018] The beneficial effects of the present invention are:

[0019] The present invention installs an X-axis driving component, a top grinding assembly, a side grinding assembly and a surface grinding assembly on a bed base, and the X-axis driving component drives the linear rail to be ground to move along the X-axis. On its moving path, the top grinding assembly grinds the top surface corners of the linear rail, the surface grinding assembly grinds the top plane of the linear rail, and the side grinding assembly grinds the left and right sides of the linear rail, thereby realizing one-stop grinding of the linear rail, eliminating the need for multiple positioning and transportation, reducing positioning errors, and achieving high processing efficiency.

[0020] The present invention utilizes the magnetic attraction of an electromagnet to adsorb the linear rail onto the linear rail seat, and the magnitude of the magnetic attraction is adjustable. When calibrating the linear rail, a relatively weak magnetic attraction is applied, and the X-axis driving component drives the linear rail to move. The correction block and the correction wheel are used to slightly push the linear rail toward each other to adjust the linear rail. The linear rail can be moved back and forth multiple times to improve the calibration accuracy. After the calibration is completed, a strong magnetic attraction is applied to the linear rail to make it firmly adsorbed onto the linear rail seat, thereby ensuring the grinding accuracy and improving the calibration efficiency. Among them, the projections of the correction wheel and the correction block on the XY plane of the present invention are staggered along the X-axis direction, so that the correction wheel will not squeeze the correction block from the front, but a small pressure is applied from the oblique front or oblique rear side of the correction block, so that the linear rail can be gently pushed in the direction opposite to the offset direction of the linear rail, so that the calibration of the linear rail can be flexibly realized, and no accidental wear of the linear rail will be caused by the correction wheel squeezing the correction block from the front.

[0021] The correction block is installed on the horizontal head of the top grinding assembly. The Y-axis module of the first YZ-axis driving component of the shared top grinding assembly flexibly adjusts the Y-axis coordinate of the correction block to adapt to linear rails of different specifications, thereby reducing the number of driving devices and making the equipment structure more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the overall layout of the present invention from a top view;

[0024] Figure 2 It is a schematic diagram of a top view detail structure embodying the present invention;

[0025] Figure 3 It is a schematic diagram of the relative positions of the correction block and the correction wheel of the present invention;

[0026] Figure 4 It is a three-dimensional structural schematic diagram of another viewing angle of the present invention;

[0027] Figure 5 It is a schematic diagram of the top structure of the present invention.

[0028] The markings in the figure are:

[0029] 10. Bed base; 11. Gantry; 12. Dust cover;

[0030] 20. X-axis drive component; 21. X-axis module; 22. X-axis linear guide;

[0031] 30. Correction assembly; 31. Correction block; 32. First lifting cylinder; 33. Translation cylinder; 34. Correction wheel;

[0032] 40. Top grinding assembly; 41. Horizontal machine head; 42. Horizontal grinding wheel; 43. First YZ axis driving member; 44. Cooling pipe; 45. Fluid flushing head; 46. Vertical plate;

[0033] 50. Side grinding assembly; 51. Second Y-axis driving member; 52. First vertical machine head; 53. Side grinding wheel;

[0034] 60. Surface grinding assembly; 61. Vertical machine base; 62. Third Z-axis driving member; 63. Second vertical machine head; 64. Surface grinding wheel;

[0035] 70. Grinding wheel repair assembly; 71. First rotating shaft; 72. Grinding wheel repair;

[0036] 80. Workbench; 81. Linear rail seat; 82. Front water baffle; 83. Rear water baffle; 90. Linear rail. DETAILED DESCRIPTION

[0037] like Figures 1 to 5 As shown, this embodiment provides a linear rail grinder, including: a bed 10, an X-axis drive member 20, a correction assembly 30, a top grinding assembly 40, a side grinding assembly 50, a surface grinding assembly 60 and a grinding wheel assembly 70.

[0038] The X-axis driving member 20 is installed on the bed 10, and is used to drive the linear rail 90 to translate along the X-axis. Each grinding component realizes the grinding of each plane of the linear rail in the moving path of the linear rail. Specifically, the X-axis driving member 20 includes an X-axis module 21 and an X-axis linear guide 22. A workbench 80 is installed on the slider of the X-axis module 21. The X-axis module 21 can drive the workbench 80 and the linear rail 90 placed above it to translate along the X-axis. A plurality of guide blocks that cooperate with the X-axis linear guide 22 are installed at the bottom of the workbench 80, and the X-axis linear guide 22 guides the movement of the workbench 80. A linear rail seat 81 for supporting the linear rail is installed on the workbench 80 along the X-axis direction. An array of electromagnets is arranged on the bed 10 directly below the linear rail seat 81. The electromagnet group is powered by an AC power supply. The electromagnet group adsorbs the linear rail on the linear rail seat, and the magnetic attraction output by the electromagnet is adjustable.

[0039] like Figures 1 to 3As shown, the correction assembly 30 includes a correction block 31, a first lifting cylinder 32, a translation cylinder 33 and a correction wheel 34. The correction block 31 is installed on the horizontal head 41 of the top grinding assembly 40, and the correction block 31 remains fixed when the linear track is corrected. The first lifting cylinder 32 is installed on the side grinding assembly 50 on the side opposite to the horizontal head 41, and the translation cylinder 33 is installed on the piston rod of the first lifting cylinder 32. The rotatable correction wheel 34 is installed on the piston rod of the translation cylinder 33. The correction wheel 34 is driven by the translation cylinder 33 to squeeze the linear track 90 onto the correction block 31. Among them, as Figure 3 As shown, the projections of the correction wheel 34 and the correction block 31 on the XY plane are staggered along the X-axis direction, and the angle a between the center line of the correction wheel 34 and the correction block 31 and the X-axis is 80-88°. The X-axis drive 20 drives the slightly deflected linear track 90 to move along the X-axis. When passing through the correction wheel 34, the deflected linear track is slightly swung by the thrust of the correction wheel 34 in the opposite direction of the deflection and is corrected. The X-axis drive 20 moves the linear track back and forth many times to achieve the correction of the positioning accuracy of the linear track. The angle a between the center line of the correction wheel 34 and the correction block 31 and the X-axis is 80-88°, that is, the correction wheel 34 pushes the linear track from the side front or side rear of the correction block 31, so that the linear track 90 has more swinging space and can be quickly corrected, and the correction wheel 34 does not press the correction block 31 head-on, avoiding the side of the linear track 90 from being frequently subjected to large pressure and wear.

[0040] The top grinding assembly 40 is used to grind the top edge and corner of the linear rail. Figure 4 and Figure 5 As shown, the top grinding assembly 40 includes a first YZ-axis driving member 43 and a horizontal machine head 41 mounted on the first YZ-axis driving member 43. A horizontal head grinding wheel 42 is vertically mounted on the motor spindle of the horizontal machine head 41, and the motor of the horizontal machine head 41 drives the horizontal head grinding wheel 42 to rotate. The first YZ-axis driving member 43 is fixed on the bed 10 and is located on the left or right side of the linear rail seat. In this embodiment, it is located on the left side of the linear rail seat. The Y-axis module of the first YZ-axis driving member 43 can drive the horizontal head grinding wheel 42 to move in the direction of the linear rail 90, and the Z-axis module of the first YZ-axis driving member 43 can drive the horizontal head grinding wheel 42 to move downward until it contacts the top surface corner of the linear rail, thereby grinding the linear rail. The top grinding assembly also includes a cooling pipe 44 and a flushing head 45 installed at the bottom end of the cooling pipe 44. The cooling pipe 44 is connected to a water pump and a coolant tank. The flushing head 45 is provided with a flat liquid outlet, which faces the horizontal grinding wheel 42. During the grinding process, the cooling liquid is sprayed to cool the horizontal grinding wheel 42. Similarly, cooling pipes and flushing heads can also be installed on the sides of other grinding wheels.

[0041] Among them, a vertical plate 46 is fixedly installed outside the protective cover of the horizontal head grinding wheel 42, and the correction block 31 of the correction assembly is fixedly installed on the vertical plate 46 and protrudes to one side of the linear rail seat 81. The installation height of the correction block 31 is a distance away from the bottom of the horizontal head grinding wheel 42. Therefore, when the correction block 31 is used, the bottom of the horizontal head grinding wheel 42 sinks to the left space of the linear rail seat 81. When the horizontal head grinding wheel 42 is used, the correction block 31 is located above the linear rail 90, and the two processes do not interfere with the workpiece.

[0042] like Figure 2 As shown, a gantry 11 is installed on the bed base 10, a second Y-axis driving component 51 is installed on the gantry 11, and side grinding assemblies 50 are respectively installed on the left and right sides of the linear rail seat 81 on the second Y-axis driving component 51, and the second Y-axis driving component 51 can drive the side grinding assembly 50 to move toward the middle, so as to grind the left side wall or the right side wall of the linear rail 90; a vertical machine base 61 is fixedly installed in the middle of the gantry 11, and a surface grinding assembly 60 is installed on the vertical machine base 61 just above the linear rail seat 81.

[0043] Among them, the second Y-axis driving component 51 of the side grinding assembly 50 is an electric lead screw, and two groups of electric lead screws are relatively installed on the gantry, which are used to drive the side grinding wheel 53 to move horizontally toward one side of the linear rail until it contacts the side of the linear rail. The first vertical head 52 is installed on the electric lead screw, and the side grinding wheel 53 is horizontally installed on the first vertical head 52. The first vertical head 52 can drive the side grinding wheel 53 to rotate.

[0044] Among them, Figure 2 As shown, the first lifting cylinder 32 of the correction assembly is installed on the first vertical head 52 on the right, and the horizontal distance between the correction wheel 34 and the linear rail seat 81 is greater than the horizontal distance between the side grinding wheel 53 on the right and the linear rail seat 81. Therefore, when correcting the linear rail, the translation cylinder 33 pushes the correction wheel 34 toward the linear rail 90. At this time, the side grinding wheel 53 does not contact the linear rail 90 and remains stationary. When grinding the side wall of the linear rail, the translation cylinder 33 pulls the correction wheel 34 away from the linear rail so that it does not contact the linear rail 90. Therefore, the actions of the correction wheel 34 and the side grinding wheel 53 do not interfere with each other, and the correction wheel 34 borrows the first vertical head 52 of the side grinding assembly, and the overall structure of the equipment is more compact.

[0045] The surface grinding assembly 60 is used to grind the top surface of the linear rail, such as Figure 4 As shown, the surface grinding assembly 60 includes a third Z-axis driving component 62 installed on a vertical machine base 61 and a second vertical machine head 63 installed on the third Z-axis driving component 62. A surface grinding wheel 64 is horizontally installed on the second vertical machine head 63. The third Z-axis driving component 62 is a Z-axis module, which can drive the second vertical machine head 63 to move downward until the surface grinding wheel 64 contacts the top surface of the linear rail to grind the surface.

[0046] A grinding wheel assembly 70 is installed on the workbench 80 at the end of the linear rail seat 81. The grinding wheel assembly 70 includes a first driving member, a first rotating shaft 71 and a grinding wheel 72. The first driving member 71 is a motor, which is installed on the wheel seat of the workbench 80. The first driving member is drivingly connected to the vertically extending first rotating shaft 71. The grinding wheel 72 is horizontally fixedly installed on the first rotating shaft 71. The X-axis driving member 20 can move the grinding wheel assembly 70 to the bottom of the horizontal head grinding wheel or the plane grinding wheel to grind the grinding wheel to prevent the abrasive edges of the grinding wheel from being rounded and blunted, and the grinding chips from being embedded in the pores on the surface of the grinding wheel, causing the grinding wheel to lose its cutting ability; the X-axis driving member can reciprocate the grinding wheel assembly 70 to make the grinding wheel 72 grind the grinding wheel back and forth, thereby improving the dressing efficiency.

[0047] A vertical front water baffle 82 and a rear water baffle 83 are respectively installed at the front and rear ends of the workbench 80 to prevent the coolant from leaking to the bottom of the workbench 80 and causing the circuit of the electromagnet group to short-circuit and affect the normal operation of the electromagnet group. Dust covers 12 are respectively installed on the bed base 10 at the front side of the front water baffle 80 and the rear side of the rear water baffle 83. The two dust covers 12 cover the front and rear ends of the X-axis linear guide 22.

[0048] The working process of this grinder is:

[0049] Adjust the position of the correction block 31 of the correction assembly so that it can abut against the side wall of the wire rail, and adjust the position of the correction wheel 34 of the correction assembly through the first lifting cylinder 32 and the translation cylinder 33 so that it can abut against the other side wall of the wire rail;

[0050] The linear rail 90 is placed on the linear rail seat 81, and the electromagnet group applies a certain strength of adsorption force to the linear rail 90, and the X-axis driving member 20 is started to drive the linear rail 90 to move along the X-axis; when the linear rail 90 passes through the correction wheel 34 and the correction block 31, it is pushed by the two and swings slightly, so as to realize automatic correction of positioning accuracy; after the correction is completed, the correction block 31 and the correction wheel 34 are reset;

[0051] The X-axis driving member 20 reciprocates the linear rail 90, and after completing multiple calibrations, increases the adsorption force of the electromagnet group to firmly fix the linear rail 90 on the linear rail seat 81;

[0052] The X-axis driving member 20 continues to translate the linear rail, adjusts the Y and Z axis coordinates of the horizontal grinding wheel 42 of the top grinding assembly, adjusts the Y axis coordinate of the side grinding wheel 53 of the side grinding assembly, and adjusts the Z axis coordinate of the plane grinding wheel 64 of the plane grinding assembly, so that each grinding wheel grinds the top corners, side walls and top plane of the linear rail;

[0053] After grinding is completed, the grinding wheels are reset, the electromagnet group is powered off, and the linear rail is removed.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Linear rail grinder, characterized in that: include: An X-axis driving member is installed on the bed base and is used to drive the linear rail to translate along the X-axis; A top grinding assembly is used for grinding the top edge corner of the linear rail. The top grinding assembly includes a first YZ-axis driving member and a horizontal machine head mounted on the first YZ-axis driving member. A horizontal head grinding wheel is vertically mounted on the horizontal machine head. The first YZ-axis driving member is used to drive the horizontal head grinding wheel to move toward the linear rail until it contacts the top edge corner of the linear rail. A side grinding assembly is used for grinding the left side or the right side of the linear rail, the side grinding assembly comprises a second Y-axis driving member and a first vertical head mounted on the second Y-axis driving member, a side grinding wheel is horizontally mounted on the first vertical head, and the second Y-axis driving member is used for driving the side grinding wheel to move toward the linear rail until it contacts the side of the linear rail; A surface grinding assembly, used for grinding the top surface of the linear rail, the surface grinding assembly comprising a third Z-axis driving member and a second vertical head mounted on the third Z-axis driving member, a surface grinding wheel being horizontally mounted on the second vertical head, and the third Z-axis driving member being used for driving the surface grinding wheel downward until it contacts the top surface of the linear rail; The X-axis driving member includes an X-axis module and an X-axis linear guide rail. A workbench is installed on the slider of the X-axis module. A plurality of guide blocks cooperating with the X-axis linear guide rail are installed at the bottom of the workbench. The X-axis driving member is used to drive the workbench to translate along the X-axis. A linear rail seat for supporting the linear rail is installed on the workbench along the X-axis direction. An electromagnet group is arrayed directly below the linear rail seat on the bed seat. The electromagnet group adsorbs the linear rail on the linear rail seat. A correction block is installed on the horizontal head of the top grinding assembly, a first lifting cylinder is installed on the side grinding assembly on the side opposite to the horizontal head, a translation cylinder is installed on the piston rod of the first lifting cylinder, a rotatable correction wheel is installed on the piston rod of the translation cylinder, and the correction wheel is driven by the translation cylinder to squeeze the linear rail onto the correction block; the projections of the correction wheel and the correction block on the XY plane are staggered along the X-axis direction, and the angle between the center line of the correction wheel and the correction block and the X-axis is 80-88°; Among them, a vertical plate is fixedly installed outside the protective cover of the horizontal head grinding wheel, and the correction block of the correction assembly is fixedly installed on the vertical plate and protrudes to one side of the linear rail seat. The installation height of the correction block is a certain distance away from the bottom of the horizontal head grinding wheel; when the correction block is used, the bottom of the horizontal head grinding wheel sinks to the left space of the linear rail seat, and when the horizontal head grinding wheel is used, the correction block is located above the linear rail, and the two processes do not interfere with the workpiece.

2. The linear rail grinding machine according to claim 1, characterized in that: A gantry is installed on the bed base, the second Y-axis driving component is installed on the gantry, and side grinding components are respectively installed on the second Y-axis driving component on both sides of the linear rail seat; a vertical machine base is fixedly installed in the middle of the gantry, and a third Z-axis driving component is installed on the vertical machine base just above the linear rail seat.

3. The linear rail grinding machine according to claim 1, characterized in that: A grinding wheel assembly is installed on the workbench at the end of the linear rail seat, and the grinding wheel assembly includes a first driving member, a first rotating shaft and a grinding wheel. The first driving member is installed on the wheel seat of the workbench, and the first driving member is drivingly connected to the vertically extending first rotating shaft. The grinding wheel is horizontally servo-installed on the first rotating shaft, and the X-axis driving member can move the grinding wheel assembly to below the horizontal grinding wheel or the plane grinding wheel.

4. The linear rail grinding machine according to claim 1, characterized in that: A vertical front water baffle and a rear water baffle are respectively installed at the front and rear ends of the workbench; dust covers are respectively installed on the bed base at the front side of the front water baffle and the rear side of the rear water baffle, and the two dust covers respectively cover the front and rear ends of the X-axis linear guide.

5. The linear rail grinding machine according to any one of claims 1 to 4, characterized in that: The top grinding assembly also includes a cooling pipe and a flushing head installed at the bottom end of the cooling pipe. The flushing head is provided with a flat liquid outlet, and the liquid outlet faces the horizontal grinding wheel.

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