Automatic tool setting device of high-precision numerical control grinding machine

Abstract

The invention discloses an automatic tool setting device of a high-precision numerical control grinding machine, and belongs to the technical field of machining, the automatic tool setting device comprises a bottom plate, an alignment assembly, a feeding assembly and a switching assembly are arranged on the bottom plate, and a linkage unit can enable eight trigger probes to synchronously move in a mode that four trigger probes form a group and is suitable for tool setting of workpieces in regular shapes. The calling unit can independently control the probe to move and is suitable for tool setting of irregular-shaped workpieces, so that the tool setting flexibility and accuracy are improved, the machining requirements of different workpieces are met, through arrangement of the switching assembly, under cooperation of a first semicircular batten and a second semicircular batten, rapid switching between the alignment assembly and the feeding assembly can be achieved, and the machining efficiency is improved. And by arranging the feeding assembly, when the laser distance measuring sensor monitors that the diameter of the grinding wheel is insufficient in real time, the abraded grinding wheel can be rapidly replaced in time, and therefore the machining quality and continuity are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of machining, and more particularly to an automatic tool setting device for a high-precision CNC grinding machine. Background Art

[0002] In the field of machining, as a high-precision machining equipment, CNC grinding machines are widely used in the precision grinding of complex workpieces. Tool setting is a key link in the grinding process, and its accuracy directly affects the machining quality of the workpiece. Traditional tool setting devices mostly adopt manual or semi-automatic methods, which have problems such as low tool setting efficiency and unstable accuracy. Especially for workpieces with irregular shapes, it is difficult for manual adjustment to meet the high-precision requirements. In addition, existing automatic tool setting devices usually adopt a single probe or a fixed array of probes, which are difficult to take into account the tool setting needs of regular and irregular workpieces, and lack flexibility. At the same time, the automation degree of grinding wheel wear monitoring and replacement is relatively low, often relying on manual intervention, which not only affects the machining continuity, but also may lead to a decline in machining quality due to untimely replacement. Therefore, the present invention provides an automatic tool setting device for a high-precision CNC grinding machine. Summary of the Invention

[0003] Aiming at the defects in the prior art, the present invention provides an automatic tool setting device for a high-precision CNC grinding machine, which overcomes the problems of low tool setting efficiency, unstable accuracy, and difficulty in taking into account the tool setting needs of regular and irregular workpieces.

[0004] To achieve the above object, the present invention provides the following technical solution: An automatic tool setting device for a high-precision CNC grinding machine, including a base plate. A fixture mounting plate is fixedly installed on the base plate. A positioning assembly, a feeding assembly, and a switching assembly are arranged on the base plate. The positioning assembly includes an H-shaped positioning slide. A positioning ring plate is arranged on the H-shaped positioning slide. Eight trigger probes are movably arranged in a circumferential array on the positioning ring plate. A linkage unit and a calling unit are arranged between the eight trigger probes. The linkage unit is used to make the trigger probes move synchronously, and the calling unit is used to make the trigger probes move independently. The feeding assembly includes an H-shaped feeding slide. A long-arm base is fixedly installed on the H-shaped feeding slide. Expanding slides are symmetrically slidably installed on the long-arm base. Fixed rotating plates are rotatably installed on the expanding slides. A grinding wheel is arranged between the two fixed rotating plates. The switching assembly includes two support frames and two switching slides. Semi-circular strip plates II are symmetrically rotatably installed on the switching slides. Semi-circular strip plates I are symmetrically rotatably installed on the support frames. Arc-shaped chutes for cooperating with the semi-circular strip plates I and the semi-circular strip plates II are symmetrically arranged on both the H-shaped feeding slide and the H-shaped positioning slide. The semi-circular strip plates I and the semi-circular strip plates II are used to realize the switching between the positioning assembly and the feeding assembly.

[0005] Further, a commutation gear ring is rotatably mounted on the H-shaped alignment carriage. An inner side of the commutation gear ring is fixedly provided with a commutation ring plate. The alignment ring plate is fixedly mounted on an inner side of the commutation ring plate. Eight L-shaped sliding plates are slidably mounted on the alignment ring plate in a circumferential array. The trigger probes are respectively fixedly mounted at ends of the L-shaped sliding plates closest to the support frame.

[0006] Further, the linkage unit includes a driven ring plate rotatably mounted on the alignment ring plate. Eight alignment gears are rotatably mounted on the alignment ring plate in a circumferential array. A torsion spring is provided between the alignment gears and the alignment ring plate. Alignment racks are fixedly provided on sides of the L-shaped sliding plates. The alignment gears and the corresponding alignment racks form a first gear-rack pair. Driven gears are rotatably mounted on the alignment gears. A torsion spring is provided between the alignment gears and the driven gears. The elastic force of the torsion spring between the alignment gears and the driven gears is always greater than the elastic force of the torsion spring between the alignment gears and the alignment ring plate. Four arc-shaped racks are fixedly provided on the driven ring plate in a circumferential array. When the arc-shaped racks are engaged with the corresponding driven gears, they form a second gear-rack pair.

[0007] Further, the calling unit includes two arc-shaped ratchet bars and three linkage ratchets. Another commutation gear ring is rotatably mounted on the alignment ring plate. The two arc-shaped ratchet bars are fixedly mounted on the commutation gear ring in a circumferential array. The linkage ratchets are all rotatably mounted on the alignment ring plate. Two of the three linkage ratchets are arranged oppositely, and two of the three linkage ratchets are arranged adjacent to each other. When the linkage ratchets are engaged with the corresponding arc-shaped ratchet bars, they form a ratchet mechanism. A gear set is provided between the linkage ratchets and the corresponding driven gears.

[0008] Further, the axes of the commutation gear ring, the commutation ring plate, the alignment ring plate, the commutation gear ring, and the driven ring plate are on the same straight line. The circumferential directions of the alignment ring plate, the arc-shaped racks, and the arc-shaped ratchet bars are the same. Two linkage push blocks I are fixedly provided on the commutation gear ring in a circumferential array. Two linkage push blocks II are fixedly provided on the driven ring plate in a circumferential array. The linkage push blocks I and the linkage push blocks II are used to drive the driven ring plate to rotate by the commutation gear ring.

[0009] Further, six fixed short columns are fixedly provided on the fixed rotating plate in a circumferential array. Six slot holes for cooperating with the fixed short columns are provided on both sides of the grinding wheel in a circumferential array. Transmission belt wheels are rotatably mounted on the unfolding sliding plates. A second transmission group is provided between the transmission belt wheels and the corresponding fixed rotating plates. A double-headed spline shaft is rotatably mounted on the long-arm base. Two ends of the double-headed spline shaft respectively form a spline sliding fit with the corresponding transmission belt wheels.

[0010] Further, a double-headed threaded screw rod is rotatably mounted on the long-arm base. Threads at two ends of the double-headed threaded screw rod respectively form a screw pair with the corresponding unfolding sliding plates. A limiting ratchet is fixedly provided at an end of the double-headed threaded screw rod. A limiting ratchet ring is slidably mounted on the long-arm base. When the limiting ratchet and the limiting ratchet ring are engaged, they form a ratchet mechanism.

[0011] Further, two support frames are stacked and fixedly connected to each other, and two switching sliders are fixedly connected to each other. A vertical slider is slidably mounted on the bottom plate, and a longitudinal slider is slidably mounted on the vertical slider. The switching slider closest to the bottom plate is slidably mounted on the longitudinal slider. The semi-circular strip plates I and II have the same dimensions, and the projections of the semi-circular strip plate I and the corresponding semi-circular strip plate II on the lower surface of the bottom plate form a complete ring plate.

[0012] Further, switching gears I are fixedly mounted on the semi-circular strip plates II, and switching gears II are fixedly mounted on the semi-circular strip plates I. Auxiliary gears II are symmetrically and rotatably mounted on the switching sliders. The auxiliary gear II and the corresponding switching gear II engage to form a gear pair I. Auxiliary gears I are fixedly mounted on the auxiliary gears II. When the auxiliary gear I and the corresponding switching gear I engage, they form a gear pair II. A linkage group is provided between the four auxiliary gears II.

[0013] The beneficial effects of the present invention compared with the prior art are as follows: (1) By setting the linkage unit and the calling unit, the present invention can achieve precise tool setting for workpieces. The linkage unit can make four of the eight trigger probes move synchronously in a group, which is suitable for tool setting of workpieces with regular shapes. The calling unit can control the movement of the probes individually, which is suitable for tool setting of workpieces with irregular shapes, thus improving the flexibility and accuracy of tool setting and meeting the processing requirements of different workpieces; (2) By setting the switching component, the present invention can achieve rapid switching between the alignment component and the feeding component in cooperation with the semi-circular strip plate I and the semi-circular strip plate II, thereby avoiding synchronous movement and reducing the load during the operation of the device, thus increasing the service life of the device; (3) By setting the feeding component, when the laser distance sensor monitors that the diameter of the grinding wheel is insufficient in real time, the worn grinding wheel can be replaced in a timely and rapid manner, thus ensuring the processing quality and continuity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a side view of the overall structure of the present invention.

[0016] Figure 3 It is a schematic diagram of the structure of the alignment component of the present invention.

[0017] Figure 4 It is a schematic diagram of the structure at the alignment ring plate of the present invention.

[0018] Figure 5 It is Figure 4 a partial enlarged schematic view of A in

[0019] Figure 6It is the bottom view of the structure at the alignment ring plate of the present invention.

[0020] Figure 7 It is the top view of the structure at the alignment ring plate of the present invention.

[0021] Figure 8 It is Figure 7 The partial enlarged schematic view at position B in

[0022] Figure 9 It is the structural schematic diagram of the feed component of the present invention.

[0023] Figure 10 It is the structural schematic diagram at the fixed short column of the present invention.

[0024] Figure 11 It is the structural schematic diagram of the switching component of the present invention.

[0025] Figure 12 It is Figure 11 The partial enlarged schematic view at position C in

[0026] Figure 13 It is the structural schematic diagram at the support frame of the present invention.

[0027] Figure 14 It is Figure 13 The partial enlarged schematic view at position D in

[0028] Figure 15 It is the structural schematic diagram at the switching carriage of the present invention.

[0029] Figure 16 It is the top view of the structure at the switching carriage of the present invention.

[0030] Reference Signs: 101 - bottom plate; 102 - fixture mounting plate; 103 - support frame; 104 - H-shaped feed carriage; 105 - H-shaped alignment carriage; 106 - grinding wheel; 107 - trigger probe; 108 - long-arm base; 109 - L-shaped slide plate; 110 - commutation gear ring; 111 - commutation gear; 112 - commutation motor; 113 - commutation ring plate; 114 - alignment ring plate; 115 - alignment gear ring; 116 - driven ring plate; 117 - alignment rack; 118 - driving gear; 119 - alignment motor; 120 - arc rack; 121 - arc ratchet bar; 122 - linkage ratchet; 123 - first linkage gear; 124 - alignment gear; 125 - driven gear; 126 - second linkage gear; 127 - deployment slide plate; 128 - deployment motor; 129 - double-headed threaded lead screw; 130 - machining motor; 131 - double-headed spline shaft; 132 - first transmission group; 133 - belt pulley; 134 - fixed rotating plate; 135 - second transmission group; 136 - limit ratchet; 137 - limit electric cylinder; 138 - limit ratchet ring; 139 - fixed short column; 140 - vertical carriage; 141 - vertical lead screw; 142 - vertical motor; 143 - longitudinal carriage; 144 - transverse lead screw; 145 - transverse motor; 146 - switching carriage; 147 - first semi-circular strip plate; 148 - second semi-circular strip plate; 149 - first auxiliary gear; 150 - second auxiliary gear; 151 - first switching gear; 152 - second switching gear; 153 - third transmission group; 154 - transmission shaft; 155 - switching motor; 156 - first linkage push block; 157 - second linkage push block; 158 - longitudinal lead screw; 159 - longitudinal motor. Detailed Implementation Manner

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] Embodiment: Refer to Figures 1 - 16, An automatic tool setting device for a high-precision CNC grinding machine, including a base plate 101. A fixture mounting plate 102 is fixedly installed on the base plate 101. A positioning assembly is arranged on the base plate 101. The positioning assembly includes an H-shaped positioning slide carriage 105. A positioning ring plate 114 is arranged on the H-shaped positioning slide carriage 105. Eight trigger probes 107 are movably arranged in a circumferential array on the positioning ring plate 114. A switching gear ring 110 and a switching gear 111 are rotatably installed on the H-shaped positioning slide carriage 105. The switching gear ring 110 and the switching gear 111 form a third gear pair. A switching motor 112 is fixedly installed on the H-shaped positioning slide carriage 105. The output shaft of the switching motor 112 is fixedly connected to the switching gear 111. An inner side of the switching gear ring 110 is fixedly installed with a switching ring plate 113. The positioning ring plate 114 is fixedly installed on the inner side of the switching ring plate 113. Eight L-shaped sliding plates 109 are slidably installed in a circumferential array on the positioning ring plate 114. The trigger probes 107 are respectively fixedly installed at the ends of the L-shaped sliding plates 109 closest to the support frame 103.

[0033] A linkage unit is arranged between the eight trigger probes 107. The linkage unit is used to make the trigger probes 107 move synchronously. The linkage unit includes a driven ring plate 116 rotatably installed on the positioning ring plate 114. Eight positioning gears 124 are rotatably installed in a circumferential array on the positioning ring plate 114. A torsion spring is arranged between the positioning gear 124 and the positioning ring plate 114. One end of the torsion spring is fixedly connected to the positioning ring plate 114, and the other end of the torsion spring is fixedly connected to the positioning gear 124. Positioning racks 117 are fixedly arranged on the sides of the L-shaped sliding plates 109. The positioning gear 124 and the corresponding positioning rack 117 form a first gear-rack pair. Driven gears 125 are rotatably installed on the positioning gears 124. A torsion spring is arranged between the positioning gear 124 and the driven gear 125. One end of the torsion spring is fixedly connected to the positioning gear 124, and the other end of the torsion spring is fixedly connected to the driven gear 125. The elastic force of the torsion spring between the positioning gear 124 and the driven gear 125 is always greater than the elastic force of the torsion spring between the positioning gear 124 and the positioning ring plate 114. Four arc-shaped racks 120 are fixedly arranged in a circumferential array on the driven ring plate 116. When the arc-shaped rack 120 is engaged with the corresponding driven gear 125, it forms a second gear-rack pair.

[0034] In the initial position, the arc-shaped racks 120 are not engaged with the driven gears 125, and the torsion springs between the positioning gears 124 and the driven gears 125 and the torsion springs between the positioning gears 124 and the positioning ring plate 114 are not deformed. At this time, the L-shaped sliding plates 109 are all located at the positions farthest from the axis of the positioning ring plate 114, that is, at this time, the trigger probes 107 are all located at the positions farthest from the axis of the positioning ring plate 114.

[0035] Reference Figure 4 、 Figure 5, when machining a rectangular workpiece, the driven ring plate 116 is driven to rotate counterclockwise. The four arc-shaped racks 120 on the driven ring plate 116 rotate counterclockwise synchronously. The four arc-shaped racks 120 are respectively engaged with the driven gears 125. At this time, the driven gears 125 engaged with the arc-shaped racks 120 are arranged at intervals from the driven gears 125 not engaged with the arc-shaped racks 120. Under the action of the arc-shaped racks 120, the corresponding driven gears 125 rotate counterclockwise. Under the action of the torsion spring between the alignment gear 124 and the driven gear 125, the alignment gear 124 rotates counterclockwise synchronously. The torsion spring between the alignment gear 124 and the alignment ring plate 114 is compressed, thereby causing the corresponding alignment rack 117 to move towards the direction close to the axis of the alignment ring plate 114, and the corresponding L-shaped slide plate 109 to move towards the direction close to the axis of the alignment ring plate 114. The trigger probe 107 on the L-shaped slide plate 109 moves synchronously, that is, the four trigger probes 107 corresponding to the driven gears 125 engaged with the arc-shaped racks 120 at this time move towards the direction close to the axis of the alignment ring plate 114 synchronously. Finally, the four trigger probes 107 respectively contact the four surfaces of the workpiece to be machined, that is, the tool setting of the workpiece is completed. When the trigger probe 107 cannot move, that is, the L-shaped slide plate 109 cannot continue to move, and then the alignment gear 124 cannot continue to rotate. At this time, the torsion spring between the alignment gear 124 and the driven gear 125 is compressed.

[0036] After the tool setting of the workpiece is completed by these four trigger probes 107, the driven ring plate 116 is continuously driven to rotate counterclockwise, and finally the arc-shaped racks 120 are respectively disengaged from the engagement with these four driven gears 125. Under the action of the torsion spring between the alignment gear 124 and the driven gear 125 and the torsion spring between the alignment gear 124 and the alignment ring plate 114, these four trigger probes 107 return to the initial position. The driven ring plate 116 continues to rotate, so that the four arc-shaped racks 120 are respectively engaged with another four driven gears 125, that is, another four trigger probes 107 move towards the direction close to the axis of the alignment ring plate 114. Repeating the above steps enables these four trigger probes 107 to perform tool setting on the workpiece again, thereby ensuring the accuracy of the tool setting result of the workpiece.

[0037] A calling unit is also arranged between the eight trigger probes 107. The calling unit is used to move the trigger probes 107 individually. The calling unit includes two arc-shaped ratchet bars 121 and three linkage ratchets 122. A positioning tooth ring 115 is also rotatably installed on the positioning ring plate 114. The two arc-shaped ratchet bars 121 are fixedly installed on the positioning tooth ring 115 in a circumferential array. The linkage ratchets 122 are all rotatably installed on the positioning ring plate 114. Two of the three linkage ratchets 122 are arranged opposite to each other, and two of the three linkage ratchets 122 are arranged adjacent to each other. When the linkage ratchet 122 engages with the corresponding arc-shaped ratchet bar 121, a ratchet mechanism is formed. A gear set is arranged between the linkage ratchet 122 and the corresponding driven gear 125. The gear sets all include a first linkage gear 123 and a second linkage gear 126. The first linkage gear 123 is fixedly installed on the corresponding linkage ratchet 122, and the second linkage gear 126 is fixedly installed on the corresponding driven gear 125. The first linkage gear 123 and the second linkage gear 126 mesh to form a fourth gear pair. In the initial position, the arc-shaped ratchet bars 121 are not engaged with the linkage ratchets 122.

[0038] Reference Figure 4 、 Figure 5 , when machining a workpiece with an irregular shape on the opposite side, when driving the positioning tooth ring 115 to rotate counterclockwise, when the arc-shaped ratchet bar 121 moves to pass by the linkage ratchet 122, the arc-shaped ratchet bar 121 cannot drive the linkage ratchet 122 to rotate. Driving the positioning tooth ring 115 to rotate clockwise causes the arc-shaped ratchet bar 121 to engage with one of the two adjacent linkage ratchets 122. There is no linkage ratchet 122 arranged at the relative position of this linkage ratchet 122. At this time, the other arc-shaped ratchet bar 121 is not engaged with the linkage ratchet 122. Under the action of the arc-shaped ratchet bar 121, this linkage ratchet 122 rotates clockwise, and the first linkage gear 123 on the linkage ratchet 122 rotates clockwise synchronously. Furthermore, the second linkage gear 126 rotates counterclockwise, and the corresponding positioning gear 124 and the driven gear 125 of the second linkage gear 126 rotate counterclockwise synchronously, that is, the L-shaped slide plate 109 corresponding to this linkage ratchet 122 moves in the direction close to the axis of the positioning ring plate 114. At this time, the other L-shaped slide plates 109 will not move, that is, the position of this trigger probe 107 is adjusted individually, so that when machining a workpiece with an irregular shape, the trigger probe 107 can be individually controlled to perform tool setting on the workpiece.

[0039] Reference Figure 4 、 Figure 5, when machining a centrosymmetric polygonal workpiece, drive the alignment gear ring 115 to rotate clockwise. Under the action of the arc-shaped ratchet bar 121, first move the trigger probe 107 that can move independently to the position closest to the axis of the alignment ring plate 114. The alignment gear ring 115 continues to rotate, and the arc-shaped ratchet bar 121 disengages from the linkage ratchet 122 corresponding to this trigger probe 107, and this trigger probe 107 returns to its initial position. The alignment gear ring 115 continues to rotate clockwise, causing the two arc-shaped ratchet bars 121 to engage with the linkage ratchets 122 respectively. At this time, the two linkage ratchets 122 engaged with the arc-shaped ratchet bars 121 are arranged oppositely. The alignment gear ring 115 continues to rotate. Under the action of the arc-shaped ratchet bar 121, the two linkage ratchets 122 rotate clockwise synchronously, thereby causing the trigger probes 107 corresponding to these two oppositely arranged linkage ratchets 122 to move towards each other. Start the transposition motor 112 to drive the transposition gear 111 to rotate, and the transposition gear ring 110 rotates relative to the H-shaped alignment carriage 105, and the components on the transposition gear ring 110 rotate synchronously, that is, the positions of these two trigger probes 107 are adjusted by starting the transposition motor 112, so that these two trigger probes 107 perform tool setting on multiple surfaces of the workpiece.

[0040] The axes of the transposition gear ring 110, the transposition ring plate 113, the alignment ring plate 114, the alignment gear ring 115, and the driven ring plate 116 are on the same straight line. The circumferential directions of the alignment ring plate 114, the arc-shaped rack 120, and the arc-shaped ratchet bar 121 are the same. A positioning motor 119 is fixedly installed on the transposition ring plate 113. A transmission gear 118 is fixedly installed on the output shaft of the positioning motor 119. The transmission gear 118 and the alignment gear ring 115 are engaged to form a fifth gear pair. Two linkage push blocks one 156 are fixedly arranged in a circumferential array on the alignment gear ring 115. Two linkage push blocks two 157 are fixedly arranged in a circumferential array on the driven ring plate 116. The linkage push block one 156 and the linkage push block two 157 are used to make the alignment gear ring 115 drive the driven ring plate 116 to rotate.

[0041] Reference Figure 4 , Figure 5, in the initial position, the trigger probe 107 is located at the position farthest from the axis of the alignment ring plate 114. The arc-shaped rack 120 and the driven gear 125 are not in contact, and the arc-shaped ratchet bar 121 and the linkage ratchet wheel 122 are not in contact. At this time, the first linkage push block 156 and the corresponding second linkage push block 157 are in the engaged state, driving the alignment gear ring 115 to rotate counterclockwise. Under the action of the first linkage push block 156 and the second linkage push block 157, the driven ring plate 116 rotates counterclockwise synchronously, that is, the linkage unit works, so that the four evenly arranged trigger probes 107 move synchronously, driving the alignment gear ring 115 to rotate clockwise. The first linkage push block 156 moves away from the second linkage push block 157, that is, at this time, the alignment gear ring 115 rotates clockwise relative to the driven ring plate 116, so that the arc-shaped ratchet bar 121 is respectively engaged with different linkage ratchet wheels 122, that is, the calling unit works, so that one or two trigger probes 107 move.

[0042] A feeding assembly is arranged on the bottom plate 101. The feeding assembly includes an H-shaped feeding carriage 104. A long-arm base 108 is fixedly installed on the H-shaped feeding carriage 104. The lower ends of the long-arm base 108 are symmetrically and slidably installed with unfolding slide plates 127. Fixed rotating plates 134 are rotatably installed on the unfolding slide plates 127. A grinding wheel 106 is arranged between the two fixed rotating plates 134. Six fixed short columns 139 are fixedly arranged in a circumferential array on the fixed rotating plates 134. Six slot holes matched with the fixed short columns 139 are arranged in a circumferential array on both sides of the grinding wheel 106. Driving belt wheels 133 are rotatably installed on the unfolding slide plates 127. A second transmission group 135 is arranged between the driving belt wheel 133 and the corresponding fixed rotating plate 134. Each second transmission group 135 includes a belt wheel and a belt. The belt wheel in the second transmission group 135 is fixedly installed on the corresponding fixed rotating plate 134. The belt in the second transmission group 135 is arranged between the belt wheel in the second transmission group 135 and the driving belt wheel 133. A double-headed spline shaft 131 is rotatably installed on the long-arm base 108. The two ends of the double-headed spline shaft 131 are respectively in spline sliding fit with the corresponding driving belt wheels 133. A processing motor 130 is also fixedly installed on the long-arm base 108. A first transmission group 132 is arranged between the output shaft of the processing motor 130 and the double-headed spline shaft 131. The first transmission group 132 includes a belt and two belt wheels. The two belt wheels in the first transmission group 132 are respectively fixedly installed on the output shaft of the processing motor 130 and the double-headed spline shaft 131. The belt in the first transmission group 132 is arranged between the two belt wheels in the first transmission group 132.

[0043] A double-headed threaded lead screw 129 is rotatably installed on the long-arm base 108. The threads at both ends of the double-headed threaded lead screw 129 respectively form a screw pair with the corresponding deployment slide plates 127. An expansion motor 128 is fixedly installed on the long-arm base 108. The output shaft of the expansion motor 128 is fixedly connected to the double-headed threaded lead screw 129. A limit ratchet wheel 136 is fixedly arranged at the end of the double-headed threaded lead screw 129. A limit ratchet ring 138 is slidably installed on the long-arm base 108. A spring is arranged between the limit ratchet ring 138 and the long-arm base 108. When the limit ratchet wheel 136 and the limit ratchet ring 138 are engaged, a ratchet mechanism is formed. A limit electric cylinder 137 is also fixedly installed on the long-arm base 108. The piston rod end of the limit electric cylinder 137 is fixedly connected to the limit ratchet ring 138. A laser distance sensor is also fixedly installed at the lower end of the long-arm base 108. The laser distance sensor is used to monitor the change in the diameter of the grinding wheel 106.

[0044] In the initial position, the spring between the limit ratchet ring 138 and the long-arm base 108 is not compressed. At this time, the limit ratchet ring 138 and the limit ratchet wheel 136 are engaged to form a ratchet mechanism. Under the action of the limit ratchet wheel 136 and the limit ratchet ring 138, the double-headed threaded lead screw 129 can make the two deployment slide plates 127 move towards each other, and cannot make the two deployment slide plates 127 move away from each other. The two fixed rotating plates 134 are located at the closest position. The fixed short columns 139 on the fixed rotating plates 134 are engaged with the corresponding slots on the grinding wheel 106. Under the action of the fixed short columns 139, the grinding wheel 106 and the two fixed rotating plates 134 form a whole, that is, the grinding wheel 106 is fixedly installed between the two fixed rotating plates 134.

[0045] Start the processing motor 130. Under the action of the first transmission group 132, the double-headed spline shaft 131 rotates synchronously, and then the two belt pulleys 133 rotate synchronously. Under the action of the second transmission group 135, the two fixed rotating plates 134 rotate synchronously, that is, the grinding wheel 106 rotates. When the workpiece to be processed is installed on the fixture mounting plate 102, the workpiece is processed by the grinding wheel 106.

[0046] When the laser distance sensor on the long arm base 108 detects that the thickness of the grinding wheel 106 is insufficient, the limit electric cylinder 137 is activated to move the limit ratchet ring 138 away from the deployment motor 128. Eventually, the limit ratchet ring 138 disengages from the limit ratchet wheel 136, and the spring between the limit ratchet ring 138 and the long arm base 108 is compressed. Then, the deployment motor 128 is activated to drive the double-headed threaded lead screw 129 to rotate, thereby causing the two deployment slide plates 127 to move away from each other. The belt pulley 133 slides relative to the double-headed spline shaft 131, that is, causing the two fixed rotating plates 134 to move away from each other. Eventually, the fixed short posts 139 on the fixed rotating plates 134 disengage from the grinding wheel 106, so that the grinding wheel 106 can be removed. After installing a new grinding wheel 106 at the position between the two fixed rotating plates 134, the limit electric cylinder 137 is activated to move the limit ratchet ring 138 back to its initial position to re-engage with the limit ratchet wheel 136 to form a ratchet mechanism. The deployment motor 128 is activated to drive the double-headed threaded lead screw 129 to rotate in the reverse direction, and the limit ratchet wheel 136 rotates relative to the limit ratchet ring 138, causing the two fixed rotating plates 134 to move closer to each other. The fixed short posts 139 on the fixed rotating plates 134 re-engage with the slots on the grinding wheel 106, and finally the two fixed rotating plates 134 complete the fixation of the workpiece. Under the action of the limit ratchet wheel 136 and the limit ratchet ring 138, the fixed rotating plates 134 cannot move relative to the grinding wheel 106.

[0047] A switching component is provided on the bottom plate 101. The switching component includes two support frames 103 and two switching slide frames 146. The two support frames 103 are stacked, and are fixedly connected between the two support frames 103. The support frame 103 closest to the lower surface of the bottom plate 101 is fixedly installed on the bottom plate 101, and the support frame 103 farthest from the lower surface of the bottom plate 101 is fixedly installed on the support frame 103 closest to the lower surface of the bottom plate 101. The projections of the two support frames 103 on the lower surface of the bottom plate 101 coincide, and the two switching slide frames 146 are fixedly connected between them.

[0048] A vertical sliding frame 140 is slidably mounted on a bottom plate 101. A vertical lead screw 141 is rotatably mounted on the bottom plate 101. The vertical lead screw 141 and the vertical sliding frame 140 form a screw pair. A vertical motor 142 is fixedly mounted on the bottom plate 101. The output shaft of the vertical motor 142 is fixedly connected to the vertical lead screw 141. The axis of the vertical lead screw 141 is parallel to the axis of the alignment ring plate 114. A longitudinal sliding frame 143 is slidably mounted on the vertical sliding frame 140. A longitudinal lead screw 158 is rotatably mounted on the vertical sliding frame 140. The longitudinal lead screw 158 and the longitudinal sliding frame 143 form a screw pair. A longitudinal motor 159 is fixedly mounted on the vertical sliding frame 140. The output shaft of the longitudinal motor 159 is fixedly connected to the longitudinal lead screw 158. The switching sliding frame 146 closest to the bottom plate 101 is slidably mounted on the longitudinal sliding frame 143. A transverse lead screw 144 is rotatably mounted on the longitudinal sliding frame 143. The transverse lead screw 144 and the corresponding switching sliding frame 146 form a screw pair. A transverse motor 145 is fixedly mounted on the longitudinal sliding frame 143. The output shaft of the transverse motor 145 is fixedly connected to the transverse lead screw 144. The axis of the longitudinal lead screw 158 is perpendicular to the axis of the vertical lead screw 141. The axis of the transverse lead screw 144 is perpendicular to the axis of the vertical lead screw 141. The axis of the transverse lead screw 144 is perpendicular to the axis of the longitudinal lead screw 158. The axes of the transverse lead screw 144 and the longitudinal lead screw 158 are both parallel to the lower surface of the bottom plate 101.

[0049] Start the vertical motor 142 to drive the vertical lead screw 141 to rotate, so that the vertical sliding frame 140 moves up and down relative to the bottom plate 101. Start the longitudinal motor 159 to drive the longitudinal lead screw 158 to rotate, so that the longitudinal sliding frame 143 moves longitudinally along the axis of the semi-circular strip plate two 148. Start the transverse motor 145 to drive the transverse lead screw 144 to rotate, so that the distance switching sliding frame 146 moves transversely along the axis of the transverse lead screw 144.

[0050] On the switching carriage 146, semi-circular strip plates II 148 are symmetrically and rotatably installed. On the semi-circular strip plates II 148, switching gears I 151 are fixedly installed. On the support frames 103, semi-circular strip plates I 147 are symmetrically and rotatably installed. There is a frictional force between the semi-circular strip plates I 147 and the support frames 103. When the semi-circular strip plates I 147 are not subjected to external forces, they will not rotate relative to the support frames 103. On the semi-circular strip plates I 147, switching gears II 152 are fixedly installed. The axes of the switching gears I 151 and the corresponding switching gears II 152 are on the same straight line. The axes of the switching gears I 151 on one switching carriage 146 and the corresponding switching gears I 151 on the other switching carriage 146 are on the same straight line. On the H-shaped feed carriage 104 and the H-shaped alignment carriage 105, arc-shaped chutes that cooperate with the semi-circular strip plates I 147 and the semi-circular strip plates II 148 are symmetrically arranged. The semi-circular strip plates I 147 and the semi-circular strip plates II 148 have the same dimensions. The projections of the semi-circular strip plates I 147 and the corresponding semi-circular strip plates II 148 on the lower surface of the base plate 101 form a complete ring plate. The semi-circular strip plates I 147 and the semi-circular strip plates II 148 are used to realize the switching between the alignment assembly and the feed assembly.

[0051] On the switching carriage 146, auxiliary gears II 150 are also symmetrically and rotatably installed. The auxiliary gears II 150 and the corresponding switching gears II 152 engage to form a gear pair I. On the auxiliary gears II 150, auxiliary gears I 149 are fixedly installed. When the auxiliary gears I 149 and the corresponding switching gears I 151 engage, they form a gear pair II. A linkage group is arranged between the four auxiliary gears II 150. The linkage group includes a transmission shaft 154 and two transmission groups III 153. The transmission shaft 154 is rotatably installed between the two switching carriages 146. On the switching carriage 146 closest to the base plate 101, a switching motor 155 is fixedly installed. The output shaft of the switching motor 155 is fixedly connected to the transmission shaft 154. The transmission group III 153 includes a belt and three belt pulleys. One belt pulley in the transmission group III 153 is fixedly installed on the transmission shaft 154. The other two belt pulleys in the transmission group III 153 are respectively fixedly installed on the two auxiliary gears II 150 on the corresponding switching carriage 146. The belt in the transmission group III 153 is arranged between the three belt pulleys in the transmission group III 153.

[0052] In the initial position, the vertical carriage 140 is located at the position farthest from the lower surface of the base plate 101. At this time, the auxiliary gear II 150 and the corresponding switching gear II 152 are engaged to form a gear pair I. The semi-circular strip plates II 148 on the switching carriage 146 farthest from the base plate 101 are all in a engaged state with the H-shaped feed carriage 104. Under the action of the two semi-circular strip plates II 148, the H-shaped feed carriage 104 cannot move relative to the switching carriage 146. At this time, the semi-circular strip plates I 147 on the support frame 103 farthest from the base plate 101 do not contact the H-shaped feed carriage 104. The semi-circular strip plates II 148 on the switching carriage 146 closest to the base plate 101 do not contact the H-shaped alignment carriage 105. The semi-circular strip plates I 147 on the support frame 103 closest to the base plate 101 are all in a engaged state with the H-shaped alignment carriage 105. Under the action of the two semi-circular strip plates I 147, the H-shaped alignment carriage 105 cannot move relative to the support frame 103. At this time, the vertical motor 142 is started to move downward, and the components on the vertical motor 142 move downward synchronously. Under the action of the semi-circular strip plate II 148 on the switching carriage 146, the H-shaped feed carriage 104 moves downward synchronously. At this time, the H-shaped alignment carriage 105 cannot move downward, that is, the downward feed of the grinding wheel 106 is realized. The horizontal motor 145 and the longitudinal motor 159 are started, so that the long arm base 108 moves inside the alignment ring plate 114, and then the grinding wheel 106 moves relative to the fixture mounting plate 102, that is, the grinding wheel 106 processes the workpiece on the fixture mounting plate 102. That is, at this time, the switching component controls the feed component to work, and the alignment component cannot move.

[0053] When tool setting is required, start the vertical motor 142, horizontal motor 145, and longitudinal motor 159 to move the long arm base 108 to the center position of the alignment ring plate 114, and make the auxiliary gear II 150 engage with the corresponding switching gear II 152 respectively. Then start the switching motor 155 to drive the transmission shaft 154 to rotate. Under the action of the transmission group III 153, the auxiliary gears II 150 all rotate synchronously. Under the action of the auxiliary gear I 149, auxiliary gear II 150, switching gear I 151, and switching gear II 152, the semi-circular strip plate I 147 and semi-circular strip plate II 148 all rotate synchronously. Finally, the semi-circular strip plate II 148 on the switching carriage 146 farthest from the bottom plate 101 disengages from the H-shaped feed carriage 104, and the semi-circular strip plate I 147 on the support frame 103 farthest from the bottom plate 101 engages with the H-shaped feed carriage 104. Under the action of the two semi-circular strip plates I 147, the H-shaped feed carriage 104 cannot move relative to the support frame 103. The semi-circular strip plate II 148 on the switching carriage 146 closest to the bottom plate 101 engages with the H-shaped alignment carriage 105. Under the action of the two semi-circular strip plates II 148, the H-shaped alignment carriage 105 cannot move relative to the support frame 103. The semi-circular strip plate I 147 on the support frame 103 closest to the bottom plate 101 disengages from the H-shaped alignment carriage 105. At this time, the vertical carriage 140 moves downward, the H-shaped alignment carriage 105 moves downward synchronously, and the H-shaped feed carriage 104 cannot move downward. That is, at this time, the switching component controls the alignment component to work, and the feed component cannot move.

[0054] Working principle: Fix the workpiece to be machined on the fixture mounting plate 102, and then through the switching component, engage the H-shaped alignment carriage 105 to the corresponding switching carriage 146. At this time, the H-shaped feed carriage 104 is fixed on the support frame 103. That is, at this time, the switching component controls the alignment component to move. Then, adjust the position of the alignment ring plate 114 through the vertical motor 142, horizontal motor 145, and longitudinal motor 159, and then perform tool setting on the workpiece through the alignment component. According to the shape of the workpiece, control the linkage unit and call unit to work, so as to select a suitable tool setting method to perform tool setting on the workpiece.

[0055] After the tool setting of the workpiece is completed, place the alignment component on the support frame 103 through the switching component, and then make the switching component and the feed component engage, that is, control the feed component to move. Then start the machining motor 130 to drive the grinding wheel 106 to rotate, and realize the machining of the workpiece on the fixture mounting plate 102 under the action of the grinding wheel 106.

[0056] The present invention is not limited to the above specific embodiments. Those skilled in the art can make various transformations without creative labor starting from the above concepts, and all fall within the protection scope of the present invention.

Claims

1. An automatic tool setting device for a high-precision CNC grinding machine, comprising a base plate (101), on which a fixture mounting plate (102) is fixedly mounted, characterized in that: The bottom plate (101) is provided with an alignment component, a feeding component, and a switching component. The alignment component comprises an H-shaped alignment slide (105). An alignment ring plate (114) is provided on the H-shaped alignment slide (105). Eight trigger probes (107) are movably provided in a circular array on the alignment ring plate (114). A linkage unit and a calling unit are provided between the eight trigger probes (107). The linkage unit is used to make the trigger probes (107) move synchronously. The calling unit is used to make the trigger probes (107) move individually. The feeding component comprises an H-shaped feeding slide (104). A long arm base (108) is fixedly mounted on the H-shaped feeding slide (104). An unfolding slide plate (108) is symmetrically slidably mounted on the long arm base (108). 127), a fixed rotating plate (134) is rotatably mounted on the unfolding slide (127), a grinding wheel (106) is arranged between the two fixed rotating plates (134), the switching assembly comprises two support frames (103) and two switching slides (146), a semicircular strip plate 2 (148) is symmetrically rotatably mounted on the switching slide (146), a semicircular strip plate 1 (147) is symmetrically rotatably mounted on the support frame (103), an arc-shaped sliding groove cooperating with the semicircular strip plate 1 (147) and the semicircular strip plate 2 (148) is symmetrically arranged on the H-shaped feeding slide (104) and the H-shaped alignment slide (105), and the semicircular strip plate 1 (147) and the semicircular strip plate 2 (148) are used to realize the switching of the alignment assembly and the feeding assembly.

2. The automatic tool setting device for a high-precision CNC grinding machine according to claim 1, characterized in that: A transposition gear ring (110) is rotatably mounted on the H-shaped alignment slide (105), a transposition ring plate (113) is fixedly mounted on the inner side of the transposition gear ring (110), the alignment ring plate (114) is fixedly mounted on the inner side of the transposition ring plate (113), eight L-shaped slides (109) are slidably mounted in a circular array on the alignment ring plate (114), and the trigger probes (107) are respectively fixedly mounted on the ends of the L-shaped slides (109) closest to the support frame (103).

3. The automatic tool setting device for a high-precision CNC grinding machine according to claim 2, characterized in that: The linkage unit comprises a driven ring plate (116) rotatably mounted on an alignment ring plate (114); eight alignment gears (124) are rotatably mounted in a circumferential array on the alignment ring plate (114); a torsion spring is arranged between the alignment gear (124) and the alignment ring plate (114); alignment racks (117) are fixedly arranged on the sides of the L-shaped slide plate (109); the alignment gears (124) and the corresponding alignment racks (117) form a gear rack pair; and the alignment gears (124) are arranged on the alignment gears (124). A driven gear (125) is rotatably mounted, a torsion spring is arranged between the counter gear (124) and the driven gear (125), the elastic force of the torsion spring between the counter gear (124) and the driven gear (125) is always greater than the elastic force of the torsion spring between the counter gear (124) and the counter ring plate (114), four arc-shaped racks (120) are fixedly arranged in a circumferential array on the driven ring plate (116), and when the arc-shaped racks (120) and the corresponding driven gears (125) are engaged, a gear rack pair 2 is formed.

4. The automatic tool setting device for a high-precision CNC grinding machine according to claim 3, characterized in that: The calling unit comprises two arc-shaped ratchets (121) and three linked ratchets (122); an alignment toothed ring (115) is rotatably mounted on the alignment ring plate (114); the two arc-shaped ratchets (121) are fixedly mounted on the alignment toothed ring (115) in a circumferential array; the linked ratchets (122) are rotatably mounted on the alignment ring plate (114); two of the three linked ratchets (122) are arranged opposite to each other; two of the three linked ratchets (122) are arranged adjacent to each other; when the linked ratchets (122) and the corresponding arc-shaped ratchets (121) are engaged, a ratchet mechanism is formed; and a gear set is arranged between the linked ratchets (122) and the corresponding driven gear (125).

5. The automatic tool setting device for a high-precision CNC grinding machine according to claim 4, characterized in that: The axes of the transposition gear ring (110), the transposition ring plate (113), the alignment ring plate (114), the alignment gear ring (115), and the driven ring plate (116) are on the same straight line; the circumferential directions of the alignment ring plate (114), the arc-shaped rack (120), and the arc-shaped ratchet bar (121) are the same; two linkage push blocks (156) are fixedly arranged in a circumferential array on the alignment gear ring (115); and two linkage push blocks (157) are fixedly arranged in a circumferential array on the driven ring plate (116); the linkage push blocks (156) and the linkage push blocks (157) are used to enable the alignment gear ring (115) to drive the driven ring plate (116) to rotate.

6. The automatic tool setting device for a high-precision CNC grinding machine according to claim 5, characterized in that: Six fixed short columns (139) are fixedly arranged in a circumferential array on the fixed rotating plate (134), six slots matching the fixed short columns (139) are arranged in a circumferential array on both sides of the grinding wheel (106), a transmission pulley (133) is rotatably mounted on the unfolding slide plate (127), a transmission group 2 (135) is arranged between the transmission pulley (133) and the corresponding fixed rotating plate (134), a double-headed spline shaft (131) is rotatably mounted on the long arm base (108), and two ends of the double-headed spline shaft (131) respectively form a spline sliding fit with the corresponding transmission pulley (133).

7. The automatic tool setting device for a high-precision CNC grinding machine according to claim 6, characterized in that: A double-threaded screw rod (129) is rotatably mounted on the long arm base (108), the threads at both ends of the double-threaded screw rod (129) respectively form a screw pair with the corresponding unfolding slide plate (127), a limit ratchet (136) is fixedly arranged at the end of the double-threaded screw rod (129), and a limit ratchet ring (138) is slidably mounted on the long arm base (108), and the limit ratchet (136) and the limit ratchet ring (138) form a ratchet mechanism when they are engaged.

8. The automatic tool setting device for a high-precision CNC grinding machine according to claim 7, characterized in that: Two support frames (103) are stacked and fixedly connected to each other. Two switching slides (146) are fixedly connected to each other. A vertical slide (140) is slidably mounted on the bottom plate (101). A longitudinal slide (143) is slidably mounted on the vertical slide (140). The switching slide (146) closest to the bottom plate (101) is slidably mounted on the longitudinal slide (143). The semicircular strip plate 1 (147) and the semicircular strip plate 2 (148) have the same size. The projections of the semicircular strip plate 1 (147) and the corresponding semicircular strip plate 2 (148) on the lower surface of the bottom plate (101) form a complete ring plate.

9. The automatic tool setting device for a high-precision CNC grinding machine according to claim 8, characterized in that: A switching gear 1 (151) is fixedly mounted on each of the semicircular strip plates (148), a switching gear 2 (152) is fixedly mounted on each of the semicircular strip plates (147), an auxiliary gear 2 (150) is symmetrically mounted on the switching slide (146) for rotation, the auxiliary gear 2 (150) and the corresponding switching gear 2 (152) are engaged to form a gear pair 1, an auxiliary gear 1 (149) is fixedly mounted on each of the auxiliary gear 2 (150), the auxiliary gear 1 (149) and the corresponding switching gear 1 (151) are engaged to form a gear pair 2, and a linkage group is provided between the four auxiliary gears 2 (150).

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