Grinding wheel dressing mechanism of vertical parallel surface grinding machine

Abstract

The invention discloses a grinding wheel dressing mechanism of a vertical parallel surface grinding machine, which is positioned between an upper grinding wheel and a lower grinding wheel of an upper grinding head assembly and a lower grinding head assembly of the vertical parallel surface grinding machine, and comprises a driving oil cylinder fixed on a grinding machine box body and a tool dressing arm driven by the driving oil cylinder to do reciprocating swing, the upper roller and the lower roller are arranged at the front end of the trimming knife arm through a roller supporting shaft, the driven belt wheel is fixed on the roller supporting shaft, the roller power transmission system is arranged on the trimming knife arm and connected with the driven belt wheel through a synchronous belt, and a roller synchronous belt tensioning device is arranged between the roller power transmission system and the driven belt wheel. The rolling wheels have the autorotation function, one more relative motion is achieved compared with a conventional oilstone finishing process, the grinding track is complex, and the finishing precision is high.

Description

Technical Field

[0001] The invention belongs to a grinding machine, and in particular relates to a grinding wheel dressing mechanism of a vertical double-end surface grinding machine. Background Art

[0002] In the grinding process, the linear speed of the grinding wheel has a great influence on the grinding accuracy of the workpiece, and there is a positive correlation between the two. Since the diameter of the grinding wheel of the vertical double-end grinder is large, the linear speed of the grinding wheel at different radial positions varies greatly. The existing technology uses an oil stone to dress the grinding wheel. In the oil stone dressing process, the oil stone is fixed relative to the dressing disk, and there are only two relative movements between the oil stone and the grinding wheel abrasive, namely the circular motion of the grinding wheel and the reciprocating swing of the dressing disk (and the oil stone) relative to the grinding wheel. The dressing trajectory is relatively simple, the shaping effect is relatively ordinary, the linear speed of the oil stone relative to the grinding wheel is low, the dressing effect is poor, and the accuracy is not ideal. Summary of the invention

[0003] The purpose of the present invention is to provide a grinding wheel dressing mechanism for a vertical double-end surface grinder with high dressing accuracy in view of the problems existing in the prior art.

[0004] The technical solution of the present invention is achieved in this way: The grinding wheel dressing mechanism of the vertical double-end surface grinder provided by the present invention is located between the upper grinding wheel and the lower grinding wheel of the upper grinding head assembly and the lower grinding head assembly of the vertical double-end surface grinder, and includes a driving cylinder fixed on the grinding machine box and a trimming arm driven by the driving cylinder to swing back and forth; it also includes upper and lower sets of rollers arranged at the front end of the trimming arm through a roller support shaft, a driven pulley fixed on the roller support shaft, and a roller power transmission system arranged on the trimming arm and connected to the driven pulley through a synchronous belt, and a roller synchronous belt tensioning device is provided between the roller power transmission system and the driven pulley.

[0005] The driving oil cylinder and the trimming arm are fixed to the grinding machine box through the oil cylinder seat and the mounting seat respectively; the trimming arm is rotatably fixed to the mounting seat through the trimming shaft; and the upper end of the trimming shaft is hinged to the joint of the driving oil cylinder piston rod through the oil cylinder swing arm.

[0006] The upper and lower ends of the trimming shaft are fixed on the mounting seat through a first bearing seat and a first bearing, and the upper end of the trimming arm and the cylinder swing arm are covered by a protective cover.

[0007] The roller power transmission system comprises a hydraulic motor fixed on the trimming arm through a motor mounting plate, and a driving pulley fixed on the rotating shaft of the hydraulic motor and connected to the synchronous belt.

[0008] The roller synchronous belt tensioning device comprises a motor mounting plate fixed on the knife trimming arm, a fixing block fixed on the knife trimming arm, and an adjusting bolt threadedly connected to the fixing block for limiting the position of the motor mounting plate on the knife trimming arm.

[0009] The trimming arm and the motor mounting plate are sealed with an O-ring, and the mounting hole on the trimming arm corresponding to the driving pulley is sealed with an end cover.

[0010] The two sets of rollers are fixed at the upper and lower ends of the roller support shaft, the driven pulley is placed in the middle of the roller support shaft, and the upper and lower ends of the roller support shaft are fixed in the roller mounting seat at the front end of the trimming arm through the second bearing and the second bearing seat.

[0011] The roller is made of composite material, the base is structural steel, the working surface is an annular abrasive grain coating surface, and the abrasive grain material is diamond or CBN. Beneficial Effects

[0012] 1. The roller has the function of self-rotation, which has one more relative motion than the conventional oilstone dressing process. The grinding track is complex and the dressing accuracy is high.

[0013] 2. The working surface area of ​​the roller is much larger than that of the oilstone, so the contact area with the grinding wheel is large and the dressing efficiency is high.

[0014] 3. The roller is driven by a hydraulic motor with strong driving force and high rotation speed, which can further improve the dressing efficiency.

[0015] 4. The working surface of the roller is CBN or diamond, which is much more durable than oilstone and can effectively improve the efficiency of equipment use.

[0016] The technical solution of the present invention is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a vertical double-end surface grinder using the present invention.

[0018] Figure 2 It is an axonometric view of the present invention.

[0019] Figure 3 It is a schematic diagram of the use state of the present invention.

[0020] Figure 4 It is a cross-sectional view of the present invention. DETAILED DESCRIPTION

[0021] See Figure 1 —— Figure 4The grinding wheel dressing mechanism 1 of the vertical double-end surface grinder provided by the present invention adopts a double roller swing arm dressing mechanism, which is located between the upper grinding wheel 7 and the lower grinding wheel 8 of the upper grinding head assembly 3 and the lower grinding head assembly 5 of the vertical double-end surface grinder, and includes a driving cylinder 102 and a trimming arm 108 fixed to the grinding machine box 2 through a cylinder seat 101 and a mounting seat 106 respectively, and the trimming arm 108 is rotatably fixed to the mounting seat 106 through a trimming shaft 105, and the upper end of the trimming shaft 105 is hinged to the joint 103 of the piston rod of the driving cylinder 102 through a cylinder swing arm 104; it also includes upper and lower sets of rollers 1 arranged at the front end of the trimming arm 108 through a roller support shaft 121 07 and 107', a driven pulley 119 fixed on the roller support shaft 121, a roller power transmission system arranged on the trimming arm 108 and connected to the driven pulley 119 through a synchronous belt 122, and a roller synchronous belt tensioning device is arranged between the roller power transmission system and the driven pulley 119; the upper and lower ends of the trimming shaft 105 are fixed on the mounting seat 106 through a bearing seat 113 and a bearing 112, and the upper end of the trimming arm 105 and the cylinder swing arm 104 are covered by a protective cover 110; the rollers 107 and 107' are made of composite materials, the matrix is ​​structural steel, the working surface is an annular abrasive coating layer, and the abrasive material is diamond or CBN.

[0022] The roller power transmission system includes a hydraulic motor 109 fixed to the trimming arm 108 through a motor mounting plate 114, and a driving pulley 123 fixed to the rotating shaft of the hydraulic motor 109 and connected to the synchronous belt 122; the roller synchronous belt tensioning device includes a motor mounting plate 114 fixed to the trimming arm 108 through screws, a fixing block 115 fixed to the trimming arm 108, and an adjusting bolt 116 provided on the fixing block 115 through a threaded connection for limiting the position of the motor mounting plate 114 on the trimming arm 108; the two sets of rollers 107 and 107′ are fixed to the two ends of the roller support shaft 121 with bolts and pins, and the driven pulley 119 is placed in the middle of the roller support shaft 121. The upper and lower ends of the roller support shaft 121 are fixed in the roller mounting seat 120 at the front end of the knife repair arm 108 through bearings 117 and bearing seats 118; the hydraulic motor 109 drives the driving pulley 123, and the driving pulley 123 drives the driven pulley 119 to rotate through the synchronous belt 122, and then drives the two sets of rollers 107 and 107' to rotate through the roller support shaft 121; the disassembly and assembly and tensioning of the synchronous belt 122 can be achieved by adjusting the adjusting bolt 116 in the roller synchronous belt tensioning device, the knife repair arm 108 and the motor mounting plate 114 are sealed with an O-ring, and the mounting hole corresponding to the driving pulley 123 on the knife repair arm 108 is sealed with an end cover 111 to prevent foreign objects from invading the knife repair arm 108.

[0023] When the present invention works, Figure 1 , Figure 3The upper grinding head assembly 3 and the lower grinding head assembly 5 of the vertical double-end surface grinder are driven by a driving device (not shown in the figure) in the vertical direction to move up and down, and at the same time, the spindles in the upper grinding head assembly 3 and the lower grinding head assembly 5 are driven by pulleys 4 and 6 in the horizontal direction to rotate, driving the upper grinding wheel 7 and the lower grinding wheel 8 to grind the upper and lower surfaces of the workpiece (not shown in the figure). When the grinding wheel is worn, the oil cylinder 102 and the oil cylinder swing arm 104 drive the trimming arm 108 to swing back and forth, and the upper roller 107 and the roller 107' respectively trim the upper grinding wheel 7 and the lower grinding wheel 8. The self-rotation of the rollers 107 and 107' and the revolution of the trimming arm 108 can eliminate the trimming error caused by the speed difference between the inner and outer lines of the grinding wheel, and improve the accuracy of the trimmed surface.

Claims

1. A grinding wheel dressing mechanism for a vertical double-end surface grinder, located between the upper grinding wheel and the lower grinding wheel of the upper grinding head assembly and the lower grinding head assembly of the vertical double-end surface grinder, characterized in that It includes a driving oil cylinder fixed on the grinding machine box and a knife trimming arm driven by the driving oil cylinder to swing back and forth; it also includes two sets of upper and lower rollers arranged at the front end of the knife trimming arm through a roller support shaft, a driven pulley fixed on the roller support shaft, and a roller power transmission system arranged on the knife trimming arm and connected to the driven pulley through a synchronous belt, and a roller synchronous belt tensioning device is arranged between the roller power transmission system and the driven pulley.

2. The grinding wheel dressing mechanism of the vertical double-end grinder according to claim 1 is characterized in that The driving oil cylinder and the trimming arm are fixed to the grinding machine box through the oil cylinder seat and the mounting seat respectively; the trimming arm is rotatably fixed to the mounting seat through the trimming shaft; and the upper end of the trimming shaft is hinged to the joint of the driving oil cylinder piston rod through the oil cylinder swing arm.

3. The grinding wheel dressing mechanism of the vertical double-end grinder according to claim 2 is characterized in that The upper and lower ends of the trimming shaft are fixed on the mounting seat through a first bearing seat and a first bearing, and the upper end of the trimming arm and the cylinder swing arm are covered by a protective cover.

4. The grinding wheel dressing mechanism of the vertical double-end grinder according to claim 1 is characterized in that The roller power transmission system comprises a hydraulic motor fixed on the trimming arm through a motor mounting plate, and a driving pulley fixed on the rotating shaft of the hydraulic motor and connected to the synchronous belt.

5. The grinding wheel dressing mechanism of the vertical double-end grinder according to claim 4 is characterized in that The roller synchronous belt tensioning device comprises a motor mounting plate fixed on the knife trimming arm, a fixing block fixed on the knife trimming arm, and an adjusting bolt threadedly connected to the fixing block for limiting the position of the motor mounting plate on the knife trimming arm.

6. The grinding wheel dressing mechanism of the vertical double-end grinder according to claim 5 is characterized in that The trimming arm and the motor mounting plate are sealed with an O-ring, and the mounting hole on the trimming arm corresponding to the driving pulley is sealed with an end cover.

7. The grinding wheel dressing mechanism of the vertical double-end grinder according to claim 1 is characterized in that The two sets of rollers are fixed at the upper and lower ends of the roller support shaft, the driven pulley is placed in the middle of the roller support shaft, and the upper and lower ends of the roller support shaft are fixed in the roller mounting seat at the front end of the trimming arm through the second bearing and the second bearing seat.

8. The grinding wheel dressing mechanism of the vertical double-end grinder according to claim 1 is characterized in that The roller is made of composite material, the base is structural steel, the working surface is an annular abrasive grain coating surface, and the abrasive grain material is diamond or CBN.

Images