Multi-grinding-head grinding machine and grinding method

Abstract

The invention discloses a multi-grinding-head grinding machine and a grinding method, and aims to overcome the defect that the machining efficiency is affected due to the fact that a grinding wheel needs to be trimmed or replaced when grinding of a linear guide rail is switched from rough grinding to fine grinding. The grinding head comprises a vertical grinding head unit and a horizontal grinding head unit, a vertical grinding head is arranged on the vertical grinding head unit, a horizontal grinding head is arranged on the horizontal grinding head unit, a coarse grinding wheel and a fine grinding wheel are arranged on the grinding head, and the coarse grinding wheel and the fine grinding wheel are axially arranged at intervals. According to the multi-grinding-head grinding machine, coarse grinding and accurate grinding operation on the linear guide rail can be achieved, the dressing operation of the grinding wheel is omitted when coarse grinding is switched to accurate grinding, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding machines, and more specifically, to a multi-grinding head grinding machine and a grinding method. Background Art

[0002] At present, in the process of linear guide rail grinding, rough grinding is performed first, and then fine grinding is performed. Rough grinding and fine grinding have different requirements for the sand grain size of the grinding wheel. Therefore, when switching from rough grinding to fine grinding, the grinding wheel needs to be trimmed or replaced. Or the rough grinding and fine grinding are arranged on different grinding machines, which not only increases the investment in equipment, but also the two clamping and positioning are likely to increase the error, affect the processing accuracy, and reduce the work efficiency. For example, Chinese patent application No. 2022235866226 discloses a grinder for linear guide rail processing. When the grinding wheel grinds the linear guide rail, it can only perform rough grinding or fine grinding. When it is necessary to switch from rough grinding to fine grinding, the grinding wheel needs to be trimmed or replaced, which affects the processing efficiency. Summary of the invention

[0003] In order to overcome the above-mentioned shortcomings, the present invention provides a multi-grinding head grinder and a grinding method, which can realize rough grinding and fine grinding operations on linear guide rails, eliminate the grinding wheel dressing operation when switching from rough grinding to fine grinding, and improve work efficiency.

[0004] In order to solve the above technical problems, the present invention adopts the following technical scheme: a multi-grinding head grinder, including a vertical grinding head unit and a horizontal grinding head unit, a vertical grinding head is arranged on the vertical grinding head unit, a horizontal grinding head is arranged on the horizontal grinding head unit, a rough grinding wheel and a fine grinding wheel are arranged on the grinding head, and the rough grinding wheel and the fine grinding wheel are arranged axially at intervals.

[0005] When grinding the linear guide, first install the linear guide on the grinding machine, then place the rough grinding wheel on the vertical grinding head unit against the vertical surface of the linear guide, and place the rough grinding wheel on the horizontal grinding head unit against the upper plane of the linear guide. The grinding head rotates to perform rough grinding on the vertical surface and the upper plane of the linear guide at the same time. After the rough grinding is completed, the grinding wheels are switched, and the vertical grinding head unit and the horizontal grinding head unit are moved so that the fine grinding wheel on the vertical grinding head is placed against the vertical surface of the linear guide, and the fine grinding wheel on the horizontal grinding head unit is placed against the upper plane of the linear guide for fine grinding. After the fine grinding is completed, the vertical grinding head unit and the horizontal grinding head unit return to their positions and the linear guide is removed. When switching from rough grinding to fine grinding, there is no need to dress the grinding wheel, nor is there any need to stop the machine to replace the grinding wheel, which greatly improves work efficiency. The rough grinding wheel and the fine grinding wheel can be dressed after being used for a period of time, and there is no need to dress them every time a linear guide is ground.

[0006] The multi-grinding head grinder can realize the rough grinding and fine grinding operations of the linear guide rail. When switching from rough grinding to fine grinding, the dressing operation of the grinding wheel is omitted, thereby improving work efficiency.

[0007] Preferably, a pair of vertical grinding head units are provided, the two vertical grinding head units are arranged opposite to each other, and one horizontal grinding head unit is provided, thereby forming a three-grinding head structure.

[0008] Two vertical grinding head units are arranged on both sides of the linear guide, so that the vertical grinding heads process the vertical surfaces on both sides of the linear guide respectively, and the horizontal grinding head on the horizontal grinding head unit processes the flat surface on the linear guide, thereby realizing three-sided grinding of the linear guide at one time, which not only improves the work efficiency, but also the two vertical grinding heads are clamped on both sides of the linear guide to prevent the linear guide position from shifting, thereby ensuring the reliability of the grinding operation.

[0009] In another solution, two pairs of vertical grinding head units are provided, the two vertical grinding head units in the same pair are arranged opposite to each other, and one horizontal grinding head unit is provided, thereby forming a five-grinding head structure.

[0010] Two pairs of vertical grinding head units and one horizontal grinding head unit together form a five-grinding head structure. When the linear guide is ground, two grinding heads are used on both sides of the vertical surface to grind at the same time, which improves the grinding efficiency. In addition, the grinding heads are clamped on both sides of the linear guide to prevent the linear guide from shifting.

[0011] Preferably, a bed is arranged below the grinding head, a movable slide is installed on the bed, and a vertical dresser and a horizontal dresser are installed on the slide.

[0012] The linear guide is installed on the slide, and the slide moves during the grinding process to achieve the lateral movement of the linear guide. The vertical dresser and horizontal dresser are used for the dressing of the vertical grinding head and the horizontal grinding head respectively.

[0013] Preferably, a crossbeam is arranged above the bed, and two oppositely arranged vertical grinding head units are installed on the crossbeam, and the vertical grinding head units are slidably installed on the crossbeam.

[0014] The two vertical grinding head units are mounted on the crossbeam and move along the length of the crossbeam, which is stable and reliable. The crossbeam is placed above the bed to avoid interference with the linear guide rail.

[0015] Preferably, the vertical grinding head unit comprises a vertical mill transverse shift seat and a vertical mill lifting seat. The vertical mill transverse shift seat is arranged to move transversely, and the vertical mill lifting seat is installed on the vertical mill transverse shift seat for lifting and movement. The vertical mill lifting seat is installed on the vertical mill motor, and the vertical mill motor is connected to the vertical grinding head through transmission.

[0016] The vertical mill transverse movement seat moves horizontally, and the vertical mill lifting seat moves vertically, so that the vertical grinding head is close to the vertical surface of the linear guide rail.

[0017] Preferably, the horizontal grinding head unit comprises a horizontal grinding transverse shift seat and a horizontal grinding lifting seat. The horizontal grinding transverse shift seat is arranged to move transversely, and the horizontal grinding lifting seat is installed on the horizontal grinding transverse shift seat for lifting and movement. The horizontal grinding motor is installed on the horizontal grinding lifting seat, and the horizontal grinding motor is connected to the horizontal grinding head through transmission.

[0018] The horizontal grinding transverse seat moves horizontally, and the horizontal grinding lifting seat moves vertically, so that the horizontal grinding head is close to the upper plane of the linear guide rail.

[0019] Preferably, the grinding head is connected to the rotating shaft, a conical head is arranged at the end of the rotating shaft, a conical hole is arranged on the grinding head, the conical hole and the conical head are plug-in connected in an adaptor, a pressure plate is connected to the conical head, and the pressure plate is pressed tightly on the grinding head.

[0020] When the grinding head is connected to the rotating shaft, the conical hole on the grinding head is adapted and inserted into the conical head at the end of the rotating shaft, and then the pressure plate is tightly connected to the conical head. The pressure plate is pressed on the grinding head. The pressure plate presses the grinding head during the connection process, thereby realizing the tight connection between the grinding head and the conical head.

[0021] Another scheme, the grinding head is connected to the rotating shaft, the mounting hole is arranged on the grinding head, the rotating shaft is plug-connected with the mounting hole, a number of movably arranged locking pins are evenly installed on the inner wall of the mounting hole, locking holes corresponding to the locking pins are arranged on the rotating shaft, the grinding head is connected to the top plate, a compression spring is installed between the top plate and the grinding head, an unlocking rod corresponding to the locking pin is arranged on the top plate, an inclined push-pull groove is arranged on the unlocking rod, a driving column is arranged on the locking pin, the driving column is movably inserted in the push-pull groove, and the locking pin is inserted in the locking hole.

[0022] When the grinding head is connected to the rotating shaft, first press the top plate, the push-pull groove on the unlocking rod pushes the locking pin outward, the locking pin retracts, and then the grinding head is directly mounted on the rotating shaft, then the top plate is loosened, and the position of the grinding head is adjusted to align the locking pin with the locking hole. Under the action of the compression spring, the unlocking rod returns with the top plate, and the push-pull groove on the unlocking rod pushes the locking pin inward, so that the locking pin is inserted into the locking hole, thereby realizing the connection and positioning of the grinding head and the rotating shaft. When disassembling the grinding head, press the top plate and then pull the grinding head outward. The assembly and disassembly of the grinding head and the rotating shaft are convenient.

[0023] A grinding method adopts a multi-grinding head grinder to realize the grinding operation of a linear guide rail, comprising the following steps: S1, installing the linear guide rail on the grinding machine; S2, the rough grinding wheel on the vertical grinding head unit is close to the vertical surface of the linear guide rail, and the rough grinding wheel on the horizontal grinding head unit is close to the upper plane of the linear guide rail; S3, the grinding head rotates to perform rough grinding on the vertical surface and the upper plane of the linear guide rail; S4, after the rough grinding is completed, the fine grinding wheel on the vertical grinding head is close to the vertical surface of the linear guide rail, and the fine grinding wheel on the horizontal grinding head unit is close to the upper plane of the linear guide rail for fine grinding.

[0024] When switching from rough grinding to fine grinding, there is no need to dress the grinding wheel or stop the machine to replace the grinding wheel, which greatly improves work efficiency. The rough grinding wheel and the fine grinding wheel can be dressed after a period of use, and there is no need to dress them every time a linear guide rail is ground.

[0025] Compared with the prior art, the beneficial effects of the present invention are: (1) the multi-grinding head grinder can realize the rough grinding and fine grinding operations of the linear guide rail, and the dressing operation of the grinding wheel is omitted when switching from rough grinding to fine grinding, thereby improving work efficiency; (2) the vertical grinding head processes the vertical surfaces on both sides of the linear guide rail respectively, while the horizontal grinding head on the horizontal grinding head unit processes the flat surface on the linear guide rail, thereby realizing three-sided grinding of the linear guide rail at one time, which not only improves work efficiency, but also the two vertical grinding heads are clamped on both sides of the linear guide rail to prevent the linear guide rail from shifting, thereby ensuring the reliability of the grinding operation; (3) the grinding head and the rotating shaft are easy to assemble and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of embodiments 1 and 3 of the present invention.

[0027] Figure 2 It is a schematic diagram of the structure of embodiments 2 and 4 of the present invention.

[0028] Figure 3 It is a connection schematic diagram of the vertical grinding head unit of the present invention.

[0029] Figure 4 It is a connection schematic diagram of the horizontal grinding head unit of the present invention.

[0030] Figure 5 It is a bed connection diagram of the present invention.

[0031] Figure 6 It is a schematic diagram of the structure of the vertical grinding head of Embodiments 1 and 3 of the present invention.

[0032] Figure 7 It is a cross-sectional view of the horizontal grinding head unit of Embodiments 1 and 3 of the present invention.

[0033] Figure 8 It is a connection diagram of the grinding head of Embodiments 2 and 4 of the present invention.

[0034] In the figure: 1, vertical grinding head unit, 2, horizontal grinding head unit, 3, grinding head, 4, rough grinding wheel, 5, fine grinding wheel, 6, rotating shaft, 7, fixed clamp seat, 8, movable clamp seat, 9, grinding wheel body, 10, isolation groove, 11, conical head, 12, conical hole, 13, pressure plate, 14, positioning groove, 15, bed, 16, slide, 17, vertical dresser, 18, horizontal dresser, 19, crossbeam, 20, vertical grinding support Seat, 21, connecting column, 22, vertical mill transverse movement seat, 23, vertical mill lifting seat, 24, vertical mill motor, 25, horizontal mill transverse movement seat, 26, horizontal mill lifting seat, 27, horizontal mill support, 28, horizontal mill motor, 29, mounting hole, 30, locking pin, 31, locking hole, 32, top plate, 33, compression spring, 34, unlocking rod, 35, push-pull groove, 36, driving column, 37, recessed groove, 38, jack, 39, radial hole. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Example 1: A multi-grinding head grinding machine (see Figure 1 , Figures 3 to 7 ), comprises a vertical grinding head unit 1 and a horizontal grinding head unit 2, the vertical grinding head unit 1 is provided with a vertical grinding head 3, the axis of the vertical grinding head 3 is arranged vertically, the horizontal grinding head unit 2 is provided with a horizontal grinding head 3, the axis of the horizontal grinding head 3 is arranged horizontally, the grinding head 3 is provided with a rough grinding wheel 4 and a fine grinding wheel 5, the rough grinding wheel 4 and the fine grinding wheel 5 are arranged axially at intervals.

[0036] The grinding head 3 is connected to the rotating shaft 6. The grinding head 3 includes a fixed clamp seat 7 and a movable clamp seat 8. The rough grinding wheel 4 and the fine grinding wheel 5 are clamped between the fixed clamp seat 7 and the movable clamp seat 8. The grinding wheel body 9 is provided on the grinding head 3. The grinding wheel body 9 is annular in structure. The grinding wheel body 9 is sleeved between the fixed clamp seat 7 and the movable clamp seat 8. The fixed clamp seat 7 and the movable clamp seat 8 are fastened by screws to achieve the connection and fastening of the grinding wheel body 9. A circle of annular isolation grooves 10 are provided on the side wall of the grinding wheel body 9, thereby forming the rough grinding wheel 4 and the fine grinding wheel 5. A conical head 11 is provided at the end of the rotating shaft 6. A conical hole 12 is provided on the grinding head 3. The conical hole 12 is provided on the fixed clamp seat 7. The conical hole 12 is adapted to be plug-in connected with the conical head 11. The conical head 11 is connected with a pressing plate 13, and the pressing plate 13 is pressed on the grinding head 3. The fixed clamp seat 7 is in a T-shaped structure, and the movable clamp seat 8 is connected to the fixed clamp seat 7 in a sleeve manner. Positioning grooves 14 are provided on the opposite surfaces of the fixed clamp seat 7 and the movable clamp seat 8, and the inner edge of the grinding wheel body 9 is adapted to be installed between the two positioning grooves 14.

[0037] A pair of vertical grinding head units 1 are arranged, the two vertical grinding head units 1 are arranged opposite to each other, and one horizontal grinding head unit 2 is arranged, thereby forming a three-grinding head structure. The two vertical grinding head units 1 are arranged on both sides of the linear guide rail, so that the vertical grinding heads 3 process the vertical surfaces on both sides of the linear guide rail respectively, and the horizontal grinding heads 3 on the horizontal grinding head units 2 process the upper plane of the linear guide rail, thereby achieving three-side grinding of the linear guide rail at one time.

[0038] A bed 15 is arranged below the grinding head 3, a movable slide 16 is installed on the bed 15, a linear motor is installed at the bottom of the slide 16, and a plurality of spaced magnetic plates are installed on the bed 15 corresponding to the linear motor. Two parallel Y-direction slide rails are installed on the bed 15, a Y-direction slide seat is installed on the Y-direction slide rail, and the Y-direction slide seat is fastened to the slide 16. A vertical dresser 17 and a horizontal dresser 18 are installed on the slide 16. The vertical dresser 17 and the horizontal dresser 18 are arranged near one end of the slide 16. A vertical dressing wheel is arranged on the vertical dresser 17, and a horizontal dressing wheel is arranged on the horizontal dresser 18. The vertical dresser 17 and the horizontal dresser 18 are used for dressing the vertical grinding head 3 and the horizontal grinding head 3, respectively.

[0039] A crossbeam 19 is arranged above the bed 15, and two oppositely arranged vertical grinding head units 1 are installed on the crossbeam 19, and the vertical grinding head units 1 are slidably installed on the crossbeam 19. Vertical grinding supports 20 are arranged on both sides of the bed 15, and the two ends of the crossbeam 19 are respectively fastened to the two vertical grinding supports 20 through two connecting columns 21.

[0040] The vertical grinding head unit 1 includes a vertical mill transverse shift seat 22 and a vertical mill lifting seat 23. The vertical mill transverse shift seat 22 is arranged to move laterally. A vertical mill transverse shift screw corresponding to the vertical mill transverse shift seat 22 is installed on the crossbeam 19. The vertical mill transverse shift screw is driven by a motor. A vertical mill transverse shift sleeve is installed on the vertical mill transverse shift seat 22. The vertical mill transverse shift screw is adaptably connected to the vertical mill transverse shift sleeve. The rotation of the vertical mill transverse shift screw drives the vertical mill transverse shift seat 22 to move in the X direction.

[0041] The vertical mill lifting seat 23 is installed on the vertical mill transverse displacement seat 22 for lifting and movement. The vertical mill motor 24 is installed on the vertical mill lifting seat 23. The vertical mill motor 24 is connected to the vertical grinding head 3 through transmission. The output shaft of the vertical mill motor 24 is connected to the rotating shaft 6 through a coupling. The grinding head 3 is installed on the rotating shaft 6. The vertical mill lifting screw driven by the motor is installed on the vertical mill transverse displacement seat 22. The vertical mill lifting screw sleeve is installed on the vertical mill lifting seat 23. The vertical mill lifting screw is adapted to be connected with the vertical mill lifting screw sleeve. The vertical mill lifting screw rotates to drive the vertical mill lifting seat 23 to move in the Z direction.

[0042] The horizontal grinding head unit 2 includes a horizontal grinding transverse shift seat 25 and a horizontal grinding lifting seat 26. The horizontal grinding transverse shift seat 25 is arranged to move transversely. A horizontal grinding support 27 corresponding to the horizontal grinding transverse shift seat 25 is arranged on the bed 15. The horizontal grinding transverse shift seat 25 is installed on the horizontal grinding support 27 and can move in the X direction. A horizontal grinding transverse shift screw driven by a motor is installed on the horizontal grinding support 27. A horizontal grinding transverse shift screw sleeve is installed at the bottom of the horizontal grinding transverse shift seat 25. The horizontal grinding transverse shift screw and the horizontal grinding transverse shift screw sleeve are adapted to be connected. The horizontal grinding lifting seat 26 is installed on the horizontal grinding transverse shift seat 25 for lifting and movement. A horizontal grinding motor 28 is installed on the horizontal grinding lifting seat 26. The horizontal grinding motor 28 is connected to the horizontal grinding head 3 in transmission. The output shaft of the horizontal grinding motor 28 is connected to the rotating shaft 6 through a coupling. The grinding head 3 is installed on the rotating shaft 6. A horizontal mill lifting screw driven by a motor is installed on the horizontal mill transverse displacement seat 25, and a horizontal mill lifting screw sleeve is fastened to the horizontal mill lifting seat 26. The horizontal mill lifting screw is adapted to be connected with the horizontal mill lifting screw sleeve, and the rotation of the horizontal mill lifting screw drives the horizontal mill lifting seat 26 to move in the Z direction.

[0043] A grinding method, using a multi-grinding head grinder to implement the grinding operation of a linear guide, includes the following steps: S1, installing the linear guide on the grinding machine; the linear guide is loaded on a slide 16 and positioned by an electromagnetic chuck; S2, the rough grinding wheel 4 on the vertical grinding head unit 1 is close to the vertical surface of the linear guide, and the rough grinding wheel 4 on the horizontal grinding head unit 2 is close to the upper plane of the linear guide; S3, the grinding head 3 rotates to perform rough grinding on the vertical surface and the upper plane of the linear guide; during the rough grinding process, the linear guide moves along the Y direction with the slide 16; S4, after the rough grinding is completed, the fine grinding wheel 5 on the vertical grinding head 3 is close to the vertical surface of the linear guide, and the fine grinding wheel 5 on the horizontal grinding head unit 2 is close to the upper plane of the linear guide for fine grinding, and the linear guide moves along the Y direction with the slide 16 during the fine grinding process. After the fine grinding is completed, the vertical grinding head unit 1 and the horizontal grinding head unit 2 return to their positions, and the linear guide is removed. After the grinding machine has been working for a period of time, the grinding head 3 is dressed. The rough grinding wheel 4 and the fine grinding wheel 5 of the vertical grinding head 3 are respectively placed against the side wall of the vertical dressing wheel for dressing. Different dressing parameters, such as the rotation speed, rotation direction, and dressing time of the vertical dressing wheel, are adjusted to achieve different dressing effects, thereby completing the dressing of the rough grinding wheel 4 and the fine grinding wheel 5. The rough grinding wheel 4 and the fine grinding wheel 5 of the horizontal grinding head 3 are respectively placed against the side wall of the horizontal dressing wheel for dressing. Different dressing parameters, such as the rotation speed, rotation direction, and dressing time of the horizontal dressing wheel, are adjusted to achieve different dressing effects, thereby completing the dressing of the rough grinding wheel 4 and the fine grinding wheel 5.

[0044] When switching from rough grinding to fine grinding, there is no need to dress the grinding wheel or stop the machine to replace the grinding wheel, which greatly improves work efficiency. The rough grinding wheel 4 and the fine grinding wheel 5 can be dressed after being used for a period of time, and there is no need to dress each time a linear guide rail is ground.

[0045] Embodiment 2: A multi-grinding head grinding machine (see Figure 2 , Figures 3 to 7 ), comprises a vertical grinding head unit 1 and a horizontal grinding head unit 2, the vertical grinding head unit 1 is provided with a vertical grinding head 3, the axis of the vertical grinding head 3 is arranged vertically, the horizontal grinding head unit 2 is provided with a horizontal grinding head 3, the axis of the horizontal grinding head 3 is arranged horizontally, the grinding head 3 is provided with a rough grinding wheel 4 and a fine grinding wheel 5, the rough grinding wheel 4 and the fine grinding wheel 5 are arranged axially at intervals.

[0046] The grinding head 3 is connected to the rotating shaft 6. The grinding head 3 includes a fixed clamp seat 7 and a movable clamp seat 8. The rough grinding wheel 4 and the fine grinding wheel 5 are clamped between the fixed clamp seat 7 and the movable clamp seat 8. The grinding wheel body 9 is provided on the grinding head 3. The grinding wheel body 9 is annular in structure. The grinding wheel body 9 is sleeved between the fixed clamp seat 7 and the movable clamp seat 8. The fixed clamp seat 7 and the movable clamp seat 8 are fastened by screws to achieve the connection and fastening of the grinding wheel body 9. A circle of annular isolation grooves 10 are provided on the side wall of the grinding wheel body 9, thereby forming the rough grinding wheel 4 and the fine grinding wheel 5. A conical head 11 is provided at the end of the rotating shaft 6. A conical hole 12 is provided on the grinding head 3. The conical hole 12 is provided on the fixed clamp seat 7. The conical hole 12 is adapted to be plug-in connected with the conical head 11. The conical head 11 is connected with a pressing plate 13, and the pressing plate 13 is pressed on the grinding head 3. The fixed clamp seat 7 is in a T-shaped structure, and the movable clamp seat 8 is connected to the fixed clamp seat 7 in a sleeve manner. Positioning grooves 14 are provided on the opposite surfaces of the fixed clamp seat 7 and the movable clamp seat 8, and the inner edge of the grinding wheel body 9 is adapted to be installed between the two positioning grooves 14.

[0047] Two pairs of vertical grinding head units 1 are arranged, and the two vertical grinding head units 1 of the same pair are arranged opposite to each other, and one horizontal grinding head unit 2 is arranged, thereby forming a five-grinding head structure. The horizontal grinding head unit 2 is placed between the two pairs of vertical grinding head units 1. The two pairs of vertical grinding head units 1 and one horizontal grinding head unit 2 together form a five-grinding head structure. During the grinding operation of the linear guide rail, two grinding heads 3 are simultaneously grinding the left and right side facades, which improves the grinding efficiency, and the grinding heads 3 are clamped on both sides of the linear guide rail to prevent the linear guide rail from shifting. The vertical grinding head units 1 are arranged on both sides of the linear guide rail, so that the vertical grinding heads 3 process the two side facades of the linear guide rail respectively, and the horizontal grinding heads 3 on the horizontal grinding head unit 2 process the upper plane of the linear guide rail, thereby realizing three-sided grinding of the linear guide rail at one time.

[0048] A bed 15 is arranged below the grinding head 3, a movable slide 16 is installed on the bed 15, a linear motor is installed at the bottom of the slide 16, and a plurality of spaced magnetic plates are installed on the bed 15 corresponding to the linear motor. Two parallel Y-direction slide rails are installed on the bed 15, a Y-direction slide seat is installed on the Y-direction slide rail, and the Y-direction slide seat is fastened to the slide 16. A vertical dresser 17 and a horizontal dresser 18 are installed on the slide 16. The vertical dresser 17 and the horizontal dresser 18 are arranged near one end of the slide 16. A vertical dressing wheel is arranged on the vertical dresser 17, and a horizontal dressing wheel is arranged on the horizontal dresser 18. The vertical dresser 17 and the horizontal dresser 18 are used for dressing the vertical grinding head 3 and the horizontal grinding head 3, respectively.

[0049] Two beams 19 are arranged above the bed 15, and two oppositely arranged vertical grinding head units 1 are installed on the beams 19, and the vertical grinding head units 1 are slidably installed on the beams 19. Vertical grinding supports 20 are arranged on both sides of the bed 15, and the two ends of the beam 19 are respectively fastened to the two vertical grinding supports 20 through two connecting columns 21.

[0050] The vertical grinding head unit 1 includes a vertical mill transverse shift seat 22 and a vertical mill lifting seat 23. The vertical mill transverse shift seat 22 is arranged to move laterally. A vertical mill transverse shift screw corresponding to the vertical mill transverse shift seat 22 is installed on the crossbeam 19. The vertical mill transverse shift screw is driven by a motor. A vertical mill transverse shift sleeve is installed on the vertical mill transverse shift seat 22. The vertical mill transverse shift screw is adaptably connected to the vertical mill transverse shift sleeve. The rotation of the vertical mill transverse shift screw drives the vertical mill transverse shift seat 22 to move in the X direction.

[0051] The vertical mill lifting seat 23 is installed on the vertical mill transverse displacement seat 22 for lifting and movement. The vertical mill motor 24 is installed on the vertical mill lifting seat 23. The vertical mill motor 24 is connected to the vertical grinding head 3 through transmission. The output shaft of the vertical mill motor 24 is connected to the rotating shaft 6 through a coupling. The grinding head 3 is installed on the rotating shaft 6. The vertical mill lifting screw driven by the motor is installed on the vertical mill transverse displacement seat 22. The vertical mill lifting screw sleeve is installed on the vertical mill lifting seat 23. The vertical mill lifting screw is adapted to be connected with the vertical mill lifting screw sleeve. The vertical mill lifting screw rotates to drive the vertical mill lifting seat 23 to move in the Z direction.

[0052] The horizontal grinding head unit 2 includes a horizontal grinding transverse shift seat 25 and a horizontal grinding lifting seat 26. The horizontal grinding transverse shift seat 25 is arranged to move transversely. A horizontal grinding support 27 corresponding to the horizontal grinding transverse shift seat 25 is arranged on the bed 15. The horizontal grinding transverse shift seat 25 is installed on the horizontal grinding support 27 and can move in the X direction. A horizontal grinding transverse shift screw driven by a motor is installed on the horizontal grinding support 27. A horizontal grinding transverse shift screw sleeve is installed at the bottom of the horizontal grinding transverse shift seat 25. The horizontal grinding transverse shift screw and the horizontal grinding transverse shift screw sleeve are adapted to be connected. The horizontal grinding lifting seat 26 is installed on the horizontal grinding transverse shift seat 25 for lifting and movement. A horizontal grinding motor 28 is installed on the horizontal grinding lifting seat 26. The horizontal grinding motor 28 is connected to the horizontal grinding head 3 in transmission. The output shaft of the horizontal grinding motor 28 is connected to the rotating shaft 6 through a coupling. The grinding head 3 is installed on the rotating shaft 6. A horizontal mill lifting screw driven by a motor is installed on the horizontal mill transverse displacement seat 25, and a horizontal mill lifting screw sleeve is fastened to the horizontal mill lifting seat 26. The horizontal mill lifting screw is adapted to be connected with the horizontal mill lifting screw sleeve, and the rotation of the horizontal mill lifting screw drives the horizontal mill lifting seat 26 to move in the Z direction.

[0053] A grinding method, using a multi-grinding head grinder to implement the grinding operation of a linear guide, includes the following steps: S1, installing the linear guide on the grinding machine; the linear guide is loaded on a slide 16 and positioned by an electromagnetic chuck; S2, the rough grinding wheel 4 on the vertical grinding head unit 1 is close to the vertical surface of the linear guide, and the rough grinding wheel 4 on the horizontal grinding head unit 2 is close to the upper plane of the linear guide; S3, the grinding head 3 rotates to perform rough grinding on the vertical surface and the upper plane of the linear guide; during the rough grinding process, the linear guide moves along the Y direction with the slide 16; S4, after the rough grinding is completed, the fine grinding wheel 5 on the vertical grinding head 3 is close to the vertical surface of the linear guide, and the fine grinding wheel 5 on the horizontal grinding head unit 2 is close to the upper plane of the linear guide for fine grinding, and the linear guide moves along the Y direction with the slide 16 during the fine grinding process. After the fine grinding is completed, the vertical grinding head unit 1 and the horizontal grinding head unit 2 return to their positions, and the linear guide is removed. After the grinding machine has been working for a period of time, the grinding head 3 is dressed. The rough grinding wheel 4 and the fine grinding wheel 5 of the vertical grinding head 3 are respectively placed against the side wall of the vertical dressing wheel for dressing. Different dressing parameters, such as the rotation speed, rotation direction, and dressing time of the vertical dressing wheel, are adjusted to achieve different dressing effects, thereby completing the dressing of the rough grinding wheel 4 and the fine grinding wheel 5. The rough grinding wheel 4 and the fine grinding wheel 5 of the horizontal grinding head 3 are respectively placed against the side wall of the horizontal dressing wheel for dressing. Different dressing parameters, such as the rotation speed, rotation direction, and dressing time of the horizontal dressing wheel, are adjusted to achieve different dressing effects, thereby completing the dressing of the rough grinding wheel 4 and the fine grinding wheel 5.

[0054] When switching from rough grinding to fine grinding, there is no need to dress the grinding wheel or stop the machine to replace the grinding wheel, which greatly improves work efficiency. The rough grinding wheel 4 and the fine grinding wheel 5 can be dressed after being used for a period of time, and there is no need to dress each time a linear guide rail is ground.

[0055] Embodiment 3: A multi-grinding head grinding machine (see Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 8 ), its structure is similar to that of embodiment 1, and the main difference is that in this embodiment, the grinding head 3 is connected to the rotating shaft 6, a mounting hole 29 is arranged on the grinding head 3, the rotating shaft 6 is plug-connected with the mounting hole 29, a plurality of movably arranged locking pins 30 are evenly installed on the inner wall of the mounting hole 29, in this embodiment, four locking pins 30 are evenly arranged, a locking hole 31 corresponding to the locking pin 30 is arranged on the rotating shaft 6, the grinding head 3 is connected to the top plate 32, a compression spring 33 is installed between the top plate 32 and the grinding head 3, an unlocking rod 34 corresponding to the locking pin 30 is arranged on the top plate 32, an inclined push-pull groove 35 is arranged on the unlocking rod 34, a driving column 36 is arranged on the locking pin 30, the driving column 36 is movably inserted in the push-pull groove 35, and the locking pin 30 is inserted in the locking hole 31. A recessed groove 37 is provided on the end surface of the fixing clamp seat 7, the top plate 32 is installed in the recessed groove 37, the mounting hole 29 is provided on the fixing clamp seat 7, a socket 38 corresponding to the unlocking rod 34 is provided on the fixing clamp seat 7, the unlocking rod 34 is movably plug-in connected to the socket 38, a radial hole 39 corresponding to the locking pin 30 is provided on the side wall of the mounting hole 29, and the locking pin 30 is movably plug-in connected to the radial hole 39.

[0056] When the grinding head 3 is connected to the rotating shaft 6, first press the top plate 32, the push-pull groove 35 on the unlocking rod 34 pushes the locking pin 30 outward, the locking pin 30 retracts, and then the grinding head 3 is directly mounted on the rotating shaft 6, and then the top plate 32 is loosened, and the position of the grinding head 3 is adjusted by rotation so that the locking pin 30 is aligned with the locking hole 31. Under the action of the compression spring 33, the unlocking rod 34 returns to its position together with the top plate 32, and the push-pull groove 35 on the unlocking rod 34 pushes the locking pin 30 inward so that the locking pin 30 is inserted into the locking hole 31, thereby realizing the connection and positioning of the grinding head 3 and the rotating shaft 6. When the grinding head 3 is disassembled, press the top plate 32, and then pull the grinding head 3 outward. The assembly and disassembly of the grinding head 3 and the rotating shaft 6 are convenient. The other structures are the same as those in Example 1.

[0057] Example 4: A multi-grinding head grinding machine (see Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8), its structure is similar to that of Example 2, the main difference being that in this embodiment, the grinding head 3 is connected to the rotating shaft 6, a mounting hole 29 is provided on the grinding head 3, the rotating shaft 6 is plug-connected with the mounting hole 29, a plurality of movably arranged locking pins 30 are evenly installed on the inner wall of the mounting hole 29, in this embodiment, four locking pins 30 are evenly arranged, a locking hole 31 corresponding to the locking pin 30 is provided on the rotating shaft 6, the grinding head 3 is connected to the top plate 32, a compression spring 33 is installed between the top plate 32 and the grinding head 3, an unlocking rod 34 corresponding to the locking pin 30 is provided on the top plate 32, an inclined push-pull groove 35 is provided on the unlocking rod 34, a driving column 36 is provided on the locking pin 30, the driving column 36 is movably plugged in the push-pull groove 35, and the locking pin 30 is plugged in the locking hole 31. A recessed groove 37 is provided on the end surface of the fixing clamp seat 7, the top plate 32 is installed in the recessed groove 37, the mounting hole 29 is provided on the fixing clamp seat 7, a socket 38 corresponding to the unlocking rod 34 is provided on the fixing clamp seat 7, the unlocking rod 34 is movably plug-in connected to the socket 38, a radial hole 39 corresponding to the locking pin 30 is provided on the side wall of the mounting hole 29, and the locking pin 30 is movably plug-in connected to the radial hole 39.

[0058] When the grinding head 3 is connected to the rotating shaft 6, first press the top plate 32, the push-pull groove 35 on the unlocking rod 34 pushes the locking pin 30 outward, the locking pin 30 retracts, and then the grinding head 3 is directly mounted on the rotating shaft 6, and then the top plate 32 is loosened, and the position of the grinding head 3 is adjusted by rotation so that the locking pin 30 is aligned with the locking hole 31. Under the action of the compression spring 33, the unlocking rod 34 returns to its position together with the top plate 32, and the push-pull groove 35 on the unlocking rod 34 pushes the locking pin 30 inward so that the locking pin 30 is inserted into the locking hole 31, thereby realizing the connection and positioning of the grinding head 3 and the rotating shaft 6. When the grinding head 3 is disassembled, press the top plate 32, and then pull the grinding head 3 outward. The assembly and disassembly of the grinding head 3 and the rotating shaft 6 are convenient. The other structures are the same as those in Example 2.

[0059] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A multi-grinding head grinding machine, characterized in that: The invention comprises a vertical grinding head unit and a horizontal grinding head unit. A vertical grinding head is arranged on the vertical grinding head unit, and a horizontal grinding head is arranged on the horizontal grinding head unit. A rough grinding wheel and a fine grinding wheel are arranged on the grinding head. The rough grinding wheel and the fine grinding wheel are arranged axially at intervals.

2. A multi-grinding head grinding machine according to claim 1, characterized in that: A pair of vertical grinding head units are arranged, the two vertical grinding head units are arranged opposite to each other, and one horizontal grinding head unit is arranged, thereby forming a three-grinding head structure.

3. The multi-grinding head grinding machine according to claim 1, characterized in that: Two pairs of vertical grinding head units are arranged, and the two vertical grinding head units in the same pair are arranged opposite to each other. One horizontal grinding head unit is arranged, thereby forming a five-grinding head structure.

4. The multi-grinding head grinding machine according to claim 1, characterized in that: A bed is arranged below the grinding head, a movable slide is installed on the bed, and a vertical dresser and a horizontal dresser are installed on the slide.

5. A multi-grinding head grinding machine according to claim 4, characterized in that: A crossbeam is arranged above the bed, and two oppositely arranged vertical grinding head units are installed on the crossbeam. The vertical grinding head units are slidably installed on the crossbeam.

6. The multi-grinding head grinding machine according to claim 1, characterized in that: The vertical grinding head unit comprises a vertical mill transverse shift seat and a vertical mill lifting seat. The vertical mill transverse shift seat is arranged to move transversely, and the vertical mill lifting seat is installed on the vertical mill transverse shift seat for lifting and movement. The vertical mill lifting seat is installed with a vertical mill motor, and the vertical mill motor is connected to the vertical grinding head through transmission.

7. The multi-grinding head grinding machine according to claim 1, characterized in that: The horizontal grinding head unit comprises a horizontal grinding transverse shift seat and a horizontal grinding lifting seat. The horizontal grinding transverse shift seat is arranged for transverse movement, and the horizontal grinding lifting seat is installed on the horizontal grinding transverse shift seat for lifting and movement. The horizontal grinding motor is installed on the horizontal grinding lifting seat, and the horizontal grinding motor is connected to the horizontal grinding head through transmission.

8. A multi-grinding head grinding machine according to any one of claims 1 to 7, characterized in that: The grinding head is connected to the rotating shaft, a conical head is arranged at the end of the rotating shaft, a conical hole is arranged on the grinding head, the conical hole and the conical head are plug-in connected in an adaptable manner, a pressing plate is connected to the conical head, and the pressing plate is pressed tightly on the grinding head.

9. A multi-grinding head grinding machine according to any one of claims 1 to 7, characterized in that: The grinding head is connected to the rotating shaft, and a mounting hole is arranged on the grinding head. The rotating shaft is plug-connected with the mounting hole. A number of movably arranged locking pins are evenly installed on the inner wall of the mounting hole. Locking holes corresponding to the locking pins are arranged on the rotating shaft. The grinding head is connected to the top plate. A compression spring is installed between the top plate and the grinding head. An unlocking rod corresponding to the locking pin is arranged on the top plate. An inclined push-pull groove is arranged on the unlocking rod. A driving column is arranged on the locking pin. The driving column is movably inserted in the push-pull groove, and the locking pin is inserted in the locking hole.

10. A grinding method, characterized in that: The multi-grinding head grinder according to any one of claims 1 to 9 is used to implement the grinding operation of the linear guide, comprising the following steps: S1, installing the linear guide on the grinding machine; S2, the rough grinding wheel on the vertical grinding head unit is close to the vertical surface of the linear guide, and the rough grinding wheel on the horizontal grinding head unit is close to the upper plane of the linear guide; S3, the grinding head rotates to perform rough grinding on the vertical surface and the upper plane of the linear guide; S4, after the rough grinding is completed, the fine grinding wheel on the vertical grinding head is close to the vertical surface of the linear guide, and the fine grinding wheel on the horizontal grinding head unit is close to the upper plane of the linear guide for fine grinding.

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