CN204397528U - A kind of automatic center hole grinding machine - Google Patents

Abstract

The utility model discloses an automatic center hole grinding machine. The left end of the grinding head supporting plate is equipped with a reciprocating supporting plate which can move along the 60° center hole bus line. The nut is connected with the reciprocating supporting plate, the reciprocating lead screw is connected with the reciprocating servo motor through a coupling, the upper right end of the grinding head supporting plate is equipped with an upper positioning top, and the grinding head supporting plate is installed on the slider of the rolling linear guide rail of the beam and the horizontal The nut on the moving screw is connected, and the horizontal moving screw is connected with the horizontal moving servo motor through the coupling. The center of the rotary plate is equipped with a tapered roller bearing and connected with the reciprocating pallet through the small shaft and the gland, and the rolling linear guide is moved up and down. There is a slide block connected with the electric spindle seat, and the electric spindle seat is equipped with a grinding electric spindle, and the grinding electric spindle seat is connected with the nut on the up and down moving screw, and the up and down moving screw is connected with the up and down through the coupling Motion servo motor connection.

Description

An automatic center hole grinder

Technical field:

The utility model relates to a grinding machine, which is especially suitable for use on a center hole grinding machine.

Background technique:

The existing center hole grinding machine is manual, the high-speed rotation of the grinding shaft is driven by an ordinary motor to rotate the large pulley, and the speed increase is realized by the large pulley driving the small pulley on the grinding shaft through a flat belt, and the speed of the grinding shaft is changed by changing the size Pulleys of different specifications are realized. The grinding shaft is mounted on the planetary main shaft at an eccentric distance from the center of the planetary main shaft, and can reciprocate along the direction of the generatrix of the 60° central hole. An ordinary motor is driven by a compound pulley. A V-belt and a round rope are connected to the compound pulley. The V-belt drives the rotation of the planetary main shaft to realize the planetary motion of the grinding shaft. The rod drives the control ring with three spiral grooves to move spirally up and down, and the control ring drives the 30° sliding guide rail to reciprocate along the direction of the 60° central hole generatrix through the cross bearing. The disadvantages are: the structure of some parts of the grinding head is complicated, there are many accumulated errors, and the accuracy of the machine tool is difficult to guarantee. The circular motion of the grinding wheel along the axis of the center hole is realized by the planetary spindle, so the diameter range of the grinding center hole is relatively small.

Existing CNC center hole grinder, such as HISCHER center hole grinder, the grinding head can move left and right on the guide rail of the bed, and the diameter of the grinding center hole increases, but because the left and right movement is manually controlled, manual tool setting is required for each processing , unable to achieve batch parts CNC machining.

The workpiece clamping device adopts a three-jaw chuck or a three-point support frame. When installing a part, the three-jaw chuck needs to insert the workpiece into the chuck hole, and manually clamp it after being aligned with a watch. The three-point support frame is at the top and bottom. Positioning, manual clamping, automatic positioning and mechanical operation cannot be realized in the two tightening methods, and the efficiency is low and the labor intensity is high.

Invention content:

The task of this utility model is to propose a kind of automatic center hole grinding machine whose grinding head part is composed of parts with simple structure, less accumulated errors and easy to guarantee the precision of the machine tool.

The task of this utility model is accomplished in this way, an automatic center hole grinder, characterized in that: the left end above the grinding head supporting plate is equipped with a reciprocating supporting plate that can move along the 60° central hole busbar, and the reciprocating supporting plate is installed On the cross ball linear guide rail, the nut on the reciprocating screw is connected to the reciprocating supporting plate. The reciprocating screw is connected to the reciprocating servo motor through a coupling. The right end of the grinding head supporting plate is equipped with an upper positioning center. , the grinding head supporting plate is installed on the slider of the beam rolling linear guide rail and connected with the nut on the laterally moving screw, and the laterally moving screw is connected with the laterally moving servo motor through a coupling, and the reciprocating supporting plate is There is an annular T-shaped slot on the surface of the plate, and the rotary disc is assembled in the annular T-shaped slot and connected by T-shaped screws. The center of the rotary disc is equipped with a tapered roller bearing and connected to the reciprocating pallet through a small shaft and a gland. The rotary table is equipped with an up and down rolling linear guide rail that is consistent with the length direction of the workpiece, and a slider is installed in the up and down rolling linear guide rail to connect with the electric spindle seat, and the electric spindle seat is equipped with a grinding electric spindle , the lower end of the grinding electric spindle is equipped with a 60° conical grinding wheel, the grinding electric spindle base is connected with the nut on the up and down moving screw, and the up and down moving screw is connected with the up and down servo motor through a coupling, The upper part of the vertical guide rail is fixed with a workpiece clamping device, and the lower part is fixed with a tailstock top device. The upper end of the cylinder seat hole is equipped with an upper end cover sealed by a sealing ring. The upper end cover is equipped with an air inlet joint. The rod is equipped with a compression spring, the lower end of the cylinder seat hole is provided with a lower end cover, the piston is connected with an upper positioning top, the machine tool is equipped with an operation box with a movable direction, and a display is installed on the operation box. The workpiece clamping device fixed on the upper part of the vertical guide rail is composed of a left slide plate and a right slide plate, and the left slide plate and the right slide plate are installed on a piece with a pitch of 4 mm at the left end and a pitch of 6 mm at the right end. Rotating to different clamping lead screws, the clamping lead screws are connected with the clamping servo motor through a shaft coupling. The bottom of the bed guide rail is fixed with a tailstock top device, on which a dial, a hand wheel and a lower positioning top are installed. The V-shaped claw is housed on the left slide plate, and the straight claw is housed on the right slide plate. The cross ball linear guide is installed under the grinding head supporting plate, and its length direction is parallel to the generatrix direction of the 60 center holes of the workpiece. The rotary table is equipped with a vertically moving rolling linear guide consistent with the length direction of the workpiece.

The utility model has the following effects: the grinding head part adopted by the technical scheme is composed of parts with simple structure, the accumulated error is less, and the accuracy of the machine tool is easy to guarantee; the processing of batch parts can be controlled by the program, and there is no need for repeated tool setting. The feed rate is consistent, the processing size is consistent, the production efficiency is high, and the labor intensity is small; it is controlled by the servo motor for workpiece clamping, the clamping center and the clamping gap are consistent, and the rotation accuracy is stable.

Description of drawings:

Figure 1 is a schematic diagram of the external structure of the utility model; Figure 2 is a cross-sectional view of the movement of the reciprocating pallet 5; Figure 3 is a cross-sectional view of the electric spindle seat moving up and down; Figure 4 is a structural cross-sectional view of the top top device; Figure 5 is a clamping device Top view; Figure 6 is a schematic diagram of the movement of the grinding spindle, the grinding wheel and the workpiece.

Drawing description: 1. Servo motor, 2. Servo motor moving up and down, 3. Rotary disc, 4. Grinding head support plate, 5. Reciprocating support plate, 6. Moving linear guide rail up and down, 7. Moving screw up and down, 8 , Upper positioning top device, 9, electric spindle seat, 10, grinding electric spindle, 11, beam rolling linear guide, 12, clamping servo motor, 13, grinding wheel, 14, clamping screw, 15, left sliding plate, 16. Upper positioning top, 17. Horizontal movement screw, 18. Horizontal movement servo motor, 19. Right sliding plate, 20. Workpiece, 21. Operation box, 22. Lower positioning top, 23. Dial, 24. Hand wheel , 25, vertical guide rail, 26, cross ball linear guide rail, 27, small shaft, 28, reciprocating screw, 29, tapered roller bearing, 30, gland, 31, T-slot screw, 32, lower end cover, 33, Cylinder seat, 34, compression spring, 35, piston, 36, O type sealing ring, 37, upper end cover, 38, V type claw, 39 straight claws.

Detailed ways:

The embodiment is described in detail in conjunction with the above drawings. The upper left end of the grinding head supporting plate 4 is equipped with a reciprocating supporting plate 5 that can reciprocate along the busbar of the 60° central hole. The reciprocating supporting plate 5 is installed on the reciprocating cross ball linear guide rail 26 On the upper guide rail (as shown in Figure 2), the lower guide rail of the reciprocating cross ball linear guide 26 is installed on the grinding head support plate 4, and the length direction of the reciprocating cross ball linear guide is in line with the 60° center hole of the workpiece 20 The direction of the bus bar is parallel, the reciprocating supporting plate 5 is connected with the nut on the reciprocating lead screw 28, the reciprocating lead screw 28 is connected with the reciprocating servo motor 1 through a coupling, and the reciprocating servo motor 1 can realize different directions under the action of the control signal, The movement at different speeds drives the reciprocating pallet to move according to the set data; the surface of the reciprocating pallet 5 is provided with an annular T-shaped groove, and the rotary disc 3 is assembled in the annular T-shaped groove and connected by a T-shaped screw 31. The center of the rotary disk is equipped with a tapered roller bearing 29 connected with the reciprocating pallet 5 through the small shaft 27 and the gland 30. The rotary disk is equipped with a vertically moving rolling linear guide 6 consistent with the length direction of the workpiece 20. The up and down moving rolling linear guide rail 6 is equipped with a slider connected with the electric spindle base 9 (as shown in Figure 3), and the electric spindle base 9 is equipped with a grinding electric spindle 10, and the grinding electric spindle 10 The lower end is equipped with a 60° conical grinding wheel 13 (as shown in Figure 6). The axis direction of the grinding electric spindle 10 is parallel to the length direction of the workpiece 20. By turning the rotary table 3 to adjust the machining error, the grinding electric spindle base 10 moves up and down. The nuts of the leading screw 7 are connected, and the up and down moving leading screw 7 is connected with the up and down moving servo motor 2 through a shaft coupling, and the up and down moving servo motor can realize rotation in different directions and at different speeds under the action of the control signal, thereby Drive the grinding electric spindle to move up and down according to the set data.

The upper right end of the above described grinding head supporting plate 4 is equipped with an upper positioning top device 8, and the grinding head supporting plate 4 is installed on the slider in the beam rolling linear guide rail 11 and connected with the laterally moving lead screw 17 nuts. The bar 17 is connected with the laterally moving servo motor 18 through a coupling, and the laterally moving servo motor can realize rotation in different directions and at different speeds under the action of the control signal, thereby driving the grinding head supporting plate 4 to roll the linear guide rail 11 on the beam. Press up to set the speed and distance to move left and right. It can realize the switching between workpiece installation positioning and grinding positioning.

The upper positioning top device 8 is installed on the grinding head supporting plate 4, and the upper positioning top device 8 (as shown in Figure 4) is composed of a cylinder block 33, a piston 35, an upper positioning top 16, a compression spring 34 , an upper end cover 37 and a lower end cover 32. Further speaking: an upper end cover 37 is installed on the upper end of the cylinder block 33 holes and is sealed by an O-ring 36. An air inlet joint is installed on the upper end cover 37, and the compressed air enters through the air intake joint. Piston 35 is housed in the cylinder base 33 of cylinder, and compression spring 34 is housed on the piston rod, plays the effect of supporting piston, and the lower end cover 32 of cylinder base 33 holes is equipped with, plays the effect of supporting compression spring, when leading into compressed air, piston 35 Moving down with the upper positioning top 16, when the compressed air is stopped to enter, the compression spring 34 returns to the initial position with the piston backstroke under the action of elastic force.

The workpiece clamping device (as shown in Figure 5), the workpiece clamping device is composed of a left slide 15 and a right slide 19, further: the left slide 15 and the right slide 19 are installed on a left end pitch It is 4mm, the pitch of the right end is 6mm, and the screw threads at both ends are screwed to different clamping screw 14, and the clamping screw 14 is connected with the clamping servo motor 12 through a coupling, and the left slide plate is equipped with V-shaped jaws 38, the height of the V-shaped jaws 38 and the right slide plate installation is 82 ° - 84 °, the best angle is 83 ° straight jaws 39 are housed on the right slide plate, the workpiece clamp The tightening device is fixed on the upper part of the vertical guide rail 25, and the position can be adjusted up and down according to the needs. The clamping servo motor 12 drives the clamping screw 14 to rotate under the action of the control signal, thereby driving the left slide plate 15 and the right slide plate 19 simultaneously. The opposite movement realizes the automatic centering clamping and loosening of the workpiece, the clamping force is consistent, and the positioning accuracy is high.

The bottom of the bed guide rail 25 is fixed with a tailstock top device, and the tailstock top device is equipped with a dial 23, a handwheel 24 and a lower positioning top 22, and the handwheel can move the tailstock top position up and down. The workpiece rotates. The lower positioning top 22 is used for double-center positioning of the workpiece. The machine tool is equipped with an operation box 21 that can rotate in the direction. The operation box 21 is integrally connected with the machine tool. There is a PLC numerical controller inside, which can program and control various actions of the machine tool.

During processing, the workpiece clamping device is fixed on the vertical guide rail of the bed. When the clamping motor drives the clamping screw to rotate, the left and right sliding plates move towards each other at the same time to realize the automatic centering clamping and loosening of the workpiece. The tailstock top device It is fixed on the lower part of the vertical guide rail of the bed, and the position can be moved up and down by shaking the hand wheel. The dial can move the workpiece to rotate. When the workpiece rotates, the grinding wheel also rotates and reciprocates along the generatrix of the cone surface of the 60° central hole to make the ground The surface forms non-overlapping cross-reticular lines, the left and right movement of the grinding head pallet, the reciprocating movement of the reciprocating parts, the up and down movement of the grinding electric spindle, and the clamping and loosening of the clamping device are all controlled by the servo motor. Realized, and completed by the control function, the corresponding data is displayed by the display on the operation box.

Claims (5)

1. an automatic center hole grinding machine, it is characterized in that: the left end above bistrique supporting plate is equipped with the reciprocal supporting plate that can move along 60 ° of bore bus bars, described reciprocal supporting plate is arranged on intersection ball line slideway and is connected with reciprocal supporting plate by the nut on reciprocal leading screw, described reciprocal leading screw is connected with reciprocating motion servomotor by shaft coupling, right-hand member above described bistrique supporting plate is equipped with locating centre, the slide block that bistrique supporting plate is arranged on crossbeam rolling linear guide is connected with the nut on transverse shifting leading screw, described transverse shifting leading screw is connected with transverse shifting servomotor by shaft coupling, the plate face of described reciprocal supporting plate has annular T-slot, rotary disk is assemblied in annular T-slot and is connected by T-shaped screw, the center of described rotary disk is equipped with taper roll bearing and is connected with reciprocal supporting plate with gland by little axle, described rotary disk is equipped with and consistent with Workpiece length direction moves up and down rolling linear guide, move up and down and in rolling linear guide, slide block is housed and is connected with electro spindle seat, in described electro spindle seat, grinding electric main shaft is housed, 60 ° of conical wheels are equipped with in described grinding electric main shaft lower end, grinding electric main shaft seat is connected with the nut moved up and down on leading screw, the described leading screw that moves up and down is connected with the servomotor that moves up and down by shaft coupling, vertical guide rail top is fixed with Workpiece clamping device, its underpart is fixed with tailstock centre device, cylinder bore upper end is equipped with upper end cover and is sealed by sealing ring, upper end cover is equipped with inlet suction port, described cylinder block is built with piston, piston rod is equipped with Compress Spring, the lower end of cylinder bore is provided with bottom end cover, piston is connected with locating centre, lathe is furnished with the control box of movable direction, control box is provided with display.

2. a kind of automatic center hole according to claim 1 grinding machine, it is characterized in that: described Workpiece clamping device is made up of left slide carriage and right slide carriage, it is 4mm that described left slide carriage and right slide carriage are arranged on a left end pitch, and right-hand member pitch is 6mm, on the clamping leading screw that two ends thread rotary orientation is different.

3. a kind of automatic center hole according to claim 1 grinding machine, is characterized in that: described tailstock centre device is equipped with driver plate, handwheel and lower locating centre.

4. a kind of automatic center hole according to claim 2 grinding machine, is characterized in that: described left slide carriage is equipped with V-arrangement claw, described right slide carriage is equipped with straight claw.

5. a kind of automatic center hole grinding machine according to claim 1 or 4, is characterized in that: described intersection ball line slideway is arranged on below bistrique supporting plate, and length direction is parallel with 60 ° of bore bus bars directions of workpiece.