CN202377878U - Device for grinding convex arc surface - Google Patents

Abstract

A device for grinding a convex arc surface, which is composed of a fixed base, a sliding support seat, a rotating block, a telescopic tube, a clamp and a grinding wheel arranged on an internal grinding machine; there is a horizontally arranged long groove on the sliding support seat The setting direction of the long slot hole is perpendicular to the main shaft of the machine tool, and the sliding support seat is connected with the fixed base through the T-shaped bolts pierced in the long slot hole; the rotating block is connected with a rotating shaft pierced on the upper part of the sliding support seat Integrate; there are two through holes on the rotating block, the axis of the through holes is perpendicular to the axis of the rotating shaft, and the two telescopic tubes are respectively installed in the two through holes; the fixture is fixed at one end of the telescopic tube; the grinding wheel and the fixed The workpiece on the fixture is opposite, and the wheel axis of the grinding wheel is parallel to the axis of rotation. The invention solves the problem of grinding the convex arc surface of a workpiece with a large radius by the internal grinding machine, expands the radius range of the grinding convex arc surface, and has simple structure and low manufacturing cost.

Description

A device for grinding convex arc surface

technical field

The utility model relates to a device for grinding the arc surface of a workpiece, in particular to a device for grinding a convex arc surface with an internal grinding machine.

Background technique

At present, the known method of grinding the convex arc surface is to install the workpiece on the headstock of the cylindrical grinding machine through the fixture for grinding. The grinding radius is the maximum radius of the spindle turning, so the workpiece whose radius is larger than the maximum turning radius of the spindle cannot be ground. The maximum grinding radius of the cylindrical grinding machine is limited by the grinding range of the machine tool, which is very limited. Blindly increasing the specifications of the cylindrical grinding machine to grind large-radius workpieces is not only costly, but also very uneconomical, and sometimes such machine tools cannot be found around. There is a certain application in the method of grinding the small inner hole by the cylindrical grinder, but there is no information in the relevant literature on the method of grinding the outer arc surface by the internal grinder, and it is still blank.

Utility model content

The technical problem to be solved by this utility model is to provide a device for grinding a convex arc surface on an internal grinding machine, which solves the problem of grinding a convex arc surface of a workpiece with a large radius, and the grinding range can be adjusted conveniently.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is: a device for grinding a convex arc surface, which is arranged on an internal grinding machine, and consists of a fixed base, a sliding support seat, a rotating block, a telescopic tube, a clamp and It is composed of grinding wheel; the fixed base is fixed on the internal grinding machine, and the grinding wheel is set on the machine tool spindle of the internal grinding machine; there is a horizontally arranged long slot hole on the sliding support seat, and the setting direction of the long slot hole is perpendicular to the machine tool spindle. The support seat is connected to the fixed base through T-shaped bolts pierced in the long slot hole; the rotating block is connected with a rotating shaft as a whole, and the rotating shaft is passed through the shaft hole on the upper part of the sliding support seat, and can be inserted into the shaft hole Internal rotation; there are two through holes on the rotating block, the axis of the through holes is perpendicular to the axis of the rotating shaft, and the two telescopic tubes are respectively inserted in the two through holes and fixed by locking screws; the fixture is fixed on the telescopic One end of the tube; the grinding wheel is opposite the workpiece fixed in the fixture, and the wheel axis of the grinding wheel is parallel to the axis of rotation.

The clamp is composed of a clamp body, a pressing plate and a pressing bolt, and the pressing plate is connected with the clamping body through the pressing bolt.

The clamp body is provided with a T-shaped slot, and one end of the pressing bolt is stuck in the T-shaped slot, and the other end is connected with the pressing plate.

The clamp body is further provided with a tightening bolt, and the tightening bolt is pushed against the end of the pressure plate away from the workpiece.

The fixed base is also provided with a driving mechanism, the driving mechanism is composed of a bracket, a screw, a screw nut and a hand wheel, the bracket is fixed on the fixed base, and the screw and the hand wheel arranged on the bracket are driven by a bevel gear. , the screw nut arranged on the lead screw is opposite to the fixture, and a dovetail groove with a direction different from the axial direction of the lead screw is provided on the side of the fixture facing the screw nut, and the tapered guide wheel on the screw nut is arranged in the dovetail groove.

The support is provided with a guide groove arranged along the axial direction of the lead screw, and the guide nail fixed on the screw nut is arranged in the guide groove.

The screw nut is also provided with an adjustment nail, and the adjustment nail is pushed against the clamp.

The beneficial effect of the utility model is that it solves the problem of grinding the convex arc surface of a workpiece with a large radius by the internal grinding machine. Both the bottom plate and the telescopic tube of the support seat can be made very long and the position can be adjusted, and the radius range of the convex arc surface to be ground can be greatly expanded. Except for the convex arc surface of the workpiece with a large radius, the smaller radius The convex arc surface can also be ground, and has a simple structure and low manufacturing cost. The driving mechanism makes the operation easy, and its guiding function improves the machining accuracy.

Description of drawings

Fig. 1 is a top view of the grinding device of the present invention.

Fig. 2 is a sectional view taken along line A-A of Fig. 1 .

Fig. 3 is a sectional view taken along line B-B of Fig. 1 .

Fig. 4 is a structural schematic diagram of the clamp.

Fig. 5 is a sectional view taken along line C-C in Fig. 2 .

Fig. 6 is a schematic diagram of a workpiece to be ground.

Marks in the figure: 1, fixed base, 2, sliding support seat, 201, slotted hole, 3, rotating block, 4, telescopic tube, 5, clamp, 501, clamp body, 502, pressure plate, 503, compression bolt , 504, T-shaped slot, 505, jacking bolt, 506, dovetail groove, 6, grinding wheel, 7, T-shaped bolt, 8, rotating shaft, 9, locking screw, 10, workpiece, 11, bracket, 111, guide Groove, 12, lead screw, 13, screw nut, 131, tapered guide wheel, 132, guide nail, 133, adjustment nail, 14, hand wheel, 15, bevel gear, 16, adjustment pad, 17, bushing, 18 , Upper positioning plate, 19, axle sleeve.

Detailed ways

The embodiment of the utility model is described in detail in conjunction with the accompanying drawings.

The device for grinding the convex arc surface of the utility model is arranged on an internal grinding machine, and consists of a fixed base 1, a sliding support seat 2, a rotating block 3, a telescopic tube 4, a clamp 5 and a grinding wheel 6. A fixed base 1 provided with a T-shaped through groove on the upper end surface is fixed on the bed of the internal grinding machine. Grinding wheel 6 is arranged on the main shaft of the machine tool of the internal grinding machine and rotates with the main shaft of the machine tool. The sliding support seat 2 is arranged on the fixed base 1, and there is a long slotted hole 201 arranged horizontally on the sliding support seat 2, and the setting direction of the long slotted hole 201 is perpendicular to the main shaft of the machine tool. The sliding support seat 2 is connected with the fixed base 1 through the T-bolt 7 pierced in the slotted hole 201 ; the position of the sliding support seat 2 can be adjusted on the fixed base 1 . The rotating block 3 is connected as a whole with a rotating shaft 8, and the connection mode can be keyed or welded. The rotating shaft 8 is passed through the shaft hole on the upper part of the sliding support seat 2, and can rotate in the shaft hole. Two through holes are arranged on the rotating block 3 , the axes of the through holes are perpendicular to the axis of the rotating shaft 8 , and the two telescopic tubes 4 are respectively inserted in the two through holes and locked and fixed by the locking screws 9 . By loosening and tightening the locking screw 9, the relative position of the telescopic tube 4 on the rotating block 3 can be adjusted. The fixture 5 for fixing the workpiece 10 to be ground is fixed on one end of the telescopic tube 4 and can rotate around the rotation axis 8 along with the telescopic tube 4 . The grinding wheel 6 is opposed to the workpiece 10 fixed on the jig 5 , and the wheel axis of the grinding wheel 6 is parallel to the rotation axis 8 .

The method for grinding using the device for grinding the convex arc surface comprises the following steps:

(1) Place the workpiece in the fixture, and make the processing surface of the workpiece to be ground face the grinding wheel, and clamp and fix the workpiece with the fixture;

(2) Loosen the locking screw, adjust the expansion and contraction of the telescopic tube, so that the distance from the processing surface of the workpiece to be ground to the axis of the rotating shaft is equal to the sum of the radius of the convex arc surface to be processed and the grinding amount, and then Fix the telescopic tube with locking screws;

(3) Loosen the T-shaped bolts, adjust the position of the sliding support seat on the fixed base, move the workpiece to the feeding range of the grinding wheel, and then fix the sliding support seat with the T-shaped bolts;

(4) Drive the fixture to rotate around the center of the rotation axis by manual or mechanical transmission. At the same time, start the main shaft of the machine tool to drive the grinding wheel to rotate, and perform feed movement according to the grinding amount, and use the grinding wheel to grind the processing surface until Grinding a convex arc surface that meets the predetermined radius requirements on the workpiece.

In order to facilitate fixing the workpiece 10 and keep it stable, the clamp 5 is composed of a clamp body 501, a pressing plate 502 and a hold-down bolt 503. The workpiece 10 is placed between the clamp body 501 and the press plate 502, and the press plate 502 is pressed The bolt 503 is connected with the clamp body 501 , so as to facilitate the pressing plate 502 to compress and fix the workpiece 10 .

The clamping body 501 is also provided with a clamping bolt 505, which is placed on the end of the pressure plate 502 away from the workpiece 10, with the clamping bolt 503 as the fulcrum, which is beneficial to the principle of leverage to further improve the clamping strength of the clamp and keep the workpiece 10 Stability during processing.

The clamp body 501 is provided with a T-shaped slot 504 , one end of the compression bolt 503 is stuck in the T-shaped slot 504 , and the other end is connected with the pressing plate 502 . By adjusting the position of the pressing bolt 503 in the T-shaped slot 504, the relative position of the pressing plate 502 and the clamp body 501 can be changed, so as to meet the needs of workpieces of different sizes and shapes.

One end of the rotating shaft 8 passes through the rotating block 3, and the end passing through the rotating block 3 has a cylindrical surface, which is used as a reference surface for measuring the radius of the convex arc surface. The distance from the cylindrical surface to the convex arc surface of the workpiece plus the radius of the cylindrical surface is the radius of the convex arc surface of the workpiece.

When directly pulling the telescopic tube 4 to make it rotate around the rotating shaft 8, the handle can be pressed on the clamp for easy operation. In order to make the operation easier, a driving mechanism can be provided on the fixed base 1 , and the telescopic tube 4 and the clamp can be driven by the driving mechanism to rotate around the rotating shaft 8 . The driving mechanism is composed of a bracket 11, a screw 12, a screw nut 13 and a hand wheel 14. The bracket 11 is fixed on the fixed base 1, and the screw 12 and the hand wheel 14 arranged on the bracket 11 are driven by a bevel gear and arranged on the wire The screw nut 13 on the bar 12 is opposite to the fixture 5. On the side of the fixture 5 facing the screw nut 13, a dovetail groove 506 with a direction different from the axial direction of the lead screw 12 is provided. The tapered guide wheel 131 on the screw nut 13 Set in the dovetail groove 506. The screw 12 is driven to rotate by the hand wheel 14 through the bevel gear. Since the tapered guide wheel 131 on the nut 13 is arranged in the dovetail groove 506 on the clamp, the nut 13 will not rotate. When the lead screw 12 rotates, the screw nut 13 moves up and down along the lead screw with the tapered guide wheel 131. The dovetail groove 506 and the lead screw 12 are arranged at a certain angle. When the screw nut 13 moves along the lead screw 12, the tapered guide wheel 131 moves along the dovetail groove 506, and drives the fixture to move to realize the circular feed movement of the workpiece. This way can effectively reduce the force required for the operation, make the operation easy and improve the safety of the operation. For the most effective driving, the lead screw 12 can be arranged vertically, and the dovetail groove 506 is arranged along the axial direction of the telescopic tube 4 .

In order to further improve the stability of the screw nut 13 during movement so that it does not shake, a guide groove 111 arranged axially along the screw 12 can be set on the support 11, and the guide groove 111 fixed on the screw nut 13 The nail 132 is arranged in the guide groove 111, and the radial force of the screw nut 13 is borne by the guide nail 132 and the guide groove 111, so as to reduce or avoid the radial force of the tapered guide wheel 131 on the clamp.

In order to ensure that the clamp is always in close contact with the tapered guide wheel 131 during movement and does not shake, an adjusting nail 133 can be set on the screw nut 13, and the adjusting nail 133 is pushed against the clamp 5, and the thrust of the adjusting nail 133 and The pulling force of the tapered guide wheels 131 acts together to ensure that the fixture does not shake in the axial direction of the rotating shaft 8 and to ensure machining accuracy.

Different models of internal grinding machines have different grinding ranges. This device is installed on a medium-to-small grinding machine in China, and the radius range of the convex arc surface that can be ground is roughly R200~700mm.

Between the rotating shaft 8 and the sliding support seat 2, and between the leading screw 12 and the support 11, a sliding bearing device can be used. In order to make the rotation light and fast, a rolling bearing can also be used instead.

Claims (7)

1. A device for grinding a convex arc surface, which is set on an internal grinding machine, and is characterized in that it consists of a fixed base (1), a sliding support seat (2), a rotating block (3), and a telescopic tube (4) , clamp (5) and grinding wheel (6); the fixed base (1) is fixed on the internal grinding machine, and the grinding wheel (6) is set on the machine tool spindle of the internal grinding machine; there is a level on the sliding bearing (2) The provided long slotted hole (201), the setting direction of the long slotted hole (201) is perpendicular to the main shaft of the machine tool, and the sliding support seat (2) is connected with the fixed base through the T-shaped bolt (7) which is penetrated in the long slotted hole (201). connected with the seat (1); the rotating block (3) is connected with a rotating shaft (8) as a whole, and the rotating shaft (8) is installed in the shaft hole on the upper part of the sliding bearing seat (2) and can rotate in the shaft hole ; There are two through holes on the rotating block (3), the axis of the through holes is perpendicular to the axis of the rotating shaft (8), and the two telescopic tubes (4) are respectively installed in the two through holes, and are locked by locking The screw (9) is fixed; the clamp (5) is fixed on one end of the telescopic tube (4); the grinding wheel (6) is opposite to the workpiece (10) fixed on the clamp (5), and the wheel shaft of the grinding wheel (6) is connected to the rotating shaft ( 8) Parallel. 2. A device for grinding a convex arc surface according to claim 1, characterized in that: the clamp (5) is composed of a clamp body (501), a pressure plate (502) and a compression bolt (503) , the pressure plate (502) is connected with the clamp body (501) through a compression bolt (503). 3. A device for grinding a convex arc surface according to claim 2, characterized in that: the clamp body (501) is provided with a T-shaped groove (504), and one end of the pressing bolt (503) It is stuck in the T-shaped slot (504), and the other end is connected with the pressure plate (502). 4. A device for grinding a convex arc surface according to claim 2, characterized in that: the clamp body (501) is also provided with a tightening bolt (505), and the tightening bolt (505) tops On the end of the pressing plate (502) away from the workpiece (10). 5. A device for grinding a convex arc surface according to claim 1, characterized in that: said fixed base (1) is also provided with a drive mechanism, the drive mechanism consists of a bracket (11), a screw (12), screw nut (13) and handwheel (14), the bracket (11) is fixed on the fixed base (1), and the lead screw (12) and handwheel (14) arranged on the bracket (11) Through bevel gear transmission, the screw nut (13) set on the lead screw (12) is opposite to the fixture (5), and a direction is set on the side of the fixture (5) facing the screw nut (13) to be aligned with the lead screw (12). ) dovetail grooves (506) with different axial directions, and the tapered guide wheel (131) on the nut (13) is set in the dovetail groove (506). 6. A device for grinding a convex arc surface according to claim 5, characterized in that: said bracket (11) is provided with a guide groove (111) arranged axially along the lead screw (12) , the guide nail (132) fixed on the screw nut (13) is set in the guide groove (111). 7. A device for grinding a convex arc surface according to claim 5, characterized in that: said screw nut (13) is also provided with an adjustment nail (133), and the adjustment nail (133) is pushed against the clamp (5) up.

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