CN109176306B - Automatic indexing device for cross workpiece and control method - Google Patents
Automatic indexing device for cross workpiece and control method Download PDFInfo
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- CN109176306B CN109176306B CN201811208996.XA CN201811208996A CN109176306B CN 109176306 B CN109176306 B CN 109176306B CN 201811208996 A CN201811208996 A CN 201811208996A CN 109176306 B CN109176306 B CN 109176306B
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- shaft
- cross workpiece
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/005—Feeding or manipulating devices specially adapted to grinding machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/10—Single-purpose machines or devices
- B24B7/16—Single-purpose machines or devices for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings
Abstract
The utility model relates to an automatic indexing device for a cross workpiece, which comprises: the first bracket and the reversing mechanism further comprise a main leveling mechanism which can be in friction contact with the outer wall surface of the first shaft of the cross workpiece placed on the first bracket, and the main leveling mechanism can be used for friction driving the cross workpiece to rotate around the axis of the first shaft; the proximity switch can identify whether the second shaft of the cross workpiece rotates to a horizontal state or not; and the controller is communicated with the reversing mechanism, the main leveling mechanism and the proximity switch and controls the reversing mechanism and the main leveling mechanism to act according to a preset program. The automatic indexing device for the cross workpiece adopts a friction transmission mode to level the cross workpiece placed on the first bracket, so that the applicability is wider, and no leveling dead angle exists. The utility model also relates to a control method of the automatic indexing device of the cross workpiece.
Description
Technical Field
The utility model relates to the technical field of grinding processing of cross workpieces, in particular to an automatic indexing device and a control method of a cross workpiece.
Background
The conventional cross workpiece, such as a cross shaft, needs to be ground at two axial ends, and in the conventional grinding production line, the feeding process of placing the cross workpiece on a grinding machine is a critical operation step. At present, most of feeding devices for cross workpieces are hooked through movable hooks or clamped through manipulators, wherein two hooking portions of the hooks or two clamping portions of the manipulators are horizontally arranged, and therefore two shaft ends of the cross workpieces to be clamped or hooked need to be in a horizontal state, and the cross workpieces can be conveniently and accurately grasped by the hooks or the manipulators.
In the actual production process, when two axial ends of a cross workpiece are ground, and two end parts in the other axial direction are required to be ground, the cross workpiece is usually taken out of a grinding machine through a manipulator and then placed on a reversing table, the cross workpiece is rotated on the reversing table for 90 degrees to be reversed, and then the manipulator clamps the two axial ends of the cross workpiece after being reversed, and then the cross workpiece is placed on the grinding machine for grinding. When the cross workpiece is taken out from the grinding machine and placed on the reversing table, the two shaft ends of the cross workpiece to be clamped or to be hooked are not necessarily in a horizontal state, so that the cross workpiece needs to be adjusted to be in a horizontal state by the leveling device so as to be clamped by the mechanical arm. Such indexing means capable of leveling the alignment of a cross-shaped workpiece are shown in the feed mechanism of a centerless grinder disclosed in chinese patent application No. CN201520255889.8 (publication No. CN 204546288U).
However, there is a certain disadvantage in the indexing device of the feeding mechanism of the centerless grinding machine, specifically, the indexing device levels the cross workpiece by moving downwards through the aligning block driven by the air cylinder arranged above the reversing table, however, when the manipulator takes the cross workpiece out of the grinding machine and places the cross workpiece on the reversing table, the shaft end of the cross workpiece which can swing freely may be in a vertical state or a nearly vertical state, so that the aligning block in the above patent is difficult to adjust the cross workpiece to a horizontal state, and a leveling dead angle occurs, thus greatly influencing the feeding efficiency of the cross workpiece, even causing equipment failure, and leading to the failure of the grinding production line of the cross workpiece.
Therefore, the conventional automatic indexing device for the cross-shaped workpiece needs to be further improved.
Disclosure of Invention
The utility model aims to solve the first technical problem of providing an automatic indexing device for cross workpieces without leveling dead angles, aiming at the current state of the art.
The second technical problem to be solved by the utility model is to provide a control method of an automatic indexing device of a cross workpiece without leveling dead angles aiming at the current state of the art.
The utility model solves the first technical problem by adopting the technical scheme that: an automatic indexing device for a cross-shaped workpiece, comprising: the first supports are respectively used for supporting two ends of a first shaft of the cross workpiece to be ground; the reversing mechanism can drive the first bracket to rotate, and correspondingly, a cross workpiece to be ground, which is placed on the first bracket, can rotate along with the first bracket; the main leveling mechanism can be in friction contact with the outer wall surface of the first shaft of the cross workpiece placed on the first bracket, and the main leveling mechanism can be used for friction driving the cross workpiece to rotate around the axis of the first shaft; the proximity switch can identify whether the second shaft of the cross workpiece rotates to a horizontal state or not; and the controller is communicated with the reversing mechanism, the main leveling mechanism and the proximity switch and controls the reversing mechanism and the main leveling mechanism to act according to a preset program.
As an improvement, the main leveling mechanism comprises a friction wheel assembly and a first driving device for driving the friction wheel assembly to rotate; the outer wall surface of the first shaft of the cross-shaped workpiece is in friction contact with the friction wheel assembly, and the rotation of the friction wheel assembly can drive the cross-shaped workpiece to rotate around the axis of the first shaft. Of course, other friction parts except the friction wheel assembly can be adopted by the main leveling mechanism, and the friction part can be in friction contact with the outer wall surface of the first shaft of the cross workpiece and drive the cross workpiece to rotate around the axis of the first shaft under the driving of the first driving device, so that the leveling of the cross workpiece is realized.
As an improvement, the friction wheel assembly comprises a driving wheel and two friction wheels which are respectively connected with the driving wheel in a transmission way; the first driving device is a driving motor, and an output shaft of the driving motor is in driving connection with the driving wheel; the two friction wheels can be matched with two sides of the outer wall surface of the first shaft of the cross workpiece so as to drive the cross workpiece to rotate. According to the structure, the two friction wheels are arranged to be matched on the two sides of the outer wall surface of the first shaft of the cross workpiece, so that the friction force born by the cross workpiece is increased, the rotation process of the cross workpiece around the first shaft is more stable, and the problem of slipping caused by insufficient friction force born by the cross workpiece is avoided; of course, the number of friction wheels can be correspondingly increased according to the mass of the cross workpiece or the friction coefficient of the friction wheels, so that the cross workpiece can smoothly rotate to further realize the leveling purpose of the cross workpiece.
As an improvement, the two main leveling mechanisms are respectively fixed on the two first brackets and can rotate along with the first brackets; the two friction wheels of the main leveling mechanism are rotatably fixed at the upper end of the first bracket, wherein two ends of the first shaft of the cross workpiece can be respectively placed on the two friction wheels of the two main leveling mechanisms. Of course, the two friction wheels respectively provided on the two first brackets may also be driven by the same driving motor.
Alternatively, the main leveling mechanism is provided with one and is fixed on one of the first brackets and can rotate along with the first bracket; the two friction wheels of the main leveling mechanism are rotatably fixed at the upper end of the first bracket, and correspondingly, the upper end of the other first bracket is fixedly provided with two auxiliary wheels capable of rotating freely, wherein the two ends of the first shaft of the cross workpiece can be placed on the two friction wheels and the two auxiliary wheels respectively. The auxiliary wheel is arranged, so that the cross workpiece only needs to be driven at one end part of the first shaft, correspondingly, the other end part of the first shaft of the cross workpiece can rotate on the auxiliary wheel, the rotation of the cross workpiece is more flexible, and the number of parts of the main leveling mechanism is reduced.
As an improvement, the device also comprises an auxiliary leveling mechanism communicated with the controller, wherein the auxiliary leveling mechanism comprises a second driving device and two second brackets which are driven by the second driving device and can move up and down; the two second brackets can be propped against two ends of the second shaft of the cross workpiece under the drive of the second driving device, so that the cross workpiece is in a horizontal state. When the cross workpiece performs leveling action through the main leveling mechanism, the leveling of the cross workpiece is not in place due to feedback time delay possibly caused by insufficient precision of the controller, and the auxiliary leveling mechanism is arranged, so that the cross workpiece which is not in place in leveling can be finely adjusted and kept in a horizontal state, and the grabbing of the feeding manipulator is facilitated.
As an improvement, the upper ends of the two second brackets are provided with concave parts for supporting the two end parts of the second shaft of the cross-shaped workpiece; the second driving device is an air cylinder. The concave part at the upper end of the second bracket can be V-shaped, arc-shaped or other shapes, so long as the limit on the two ends of the second shaft of the cross-shaped workpiece can be met; in addition, the telescopic stroke of the air cylinder is matched with the height of the second bracket and the height of the second shaft of the cross workpiece in a horizontal state, so that the second bracket can be supported just below the two end parts of the second shaft of the cross workpiece, and of course, the second driving device can also adopt other conventional driving devices such as electric driving, hydraulic driving and the like.
As an improvement, the reversing mechanism comprises a rotary cylinder and a rotating shaft driven by the rotary cylinder; the two first brackets are fixedly connected to the rotating shaft and can rotate along with the rotating shaft of the rotating cylinder. Of course, the reversing mechanism may be driven by electric drive, hydraulic drive, or other conventional driving methods.
The utility model solves the second technical problem by adopting the technical scheme that: the control method of the automatic indexing device for the cross workpiece comprises a reversing step, a leveling step and a resetting step, wherein the reversing step is as follows: the controller controls the reversing mechanism to drive the first bracket to rotate, and the cross workpiece to be ground placed on the first bracket can rotate along with the first bracket to finish reversing operation.
Leveling: the controller controls the first driving device of the main leveling mechanism to drive the friction wheel assembly to rotate, so that the cross workpiece in friction contact with the friction wheel assembly is driven to rotate around the axis of the first shaft of the cross workpiece, when the second shaft of the cross workpiece rotates to be in a horizontal state or is close to the horizontal state, the proximity switch can identify the state and feed back the signal to the controller, and the controller controls the first driving device to be closed, so that leveling operation of the cross workpiece is completed.
Resetting: when the cross workpiece is grabbed and separated from the first support, the controller controls the reversing mechanism to drive the first support to rotate to the initial position, and reset operation is completed.
Preferably, under the control of the controller, the reversing operation of the cross workpiece is finished through the reversing mechanism, then the leveling operation of the cross workpiece is finished through the main leveling mechanism, and after the cross workpiece is grabbed and separated from the first bracket, the resetting operation of the first bracket is finished through the reversing mechanism, so that the next cross workpiece can be placed.
Or under the control of the controller, the leveling operation of the cross workpiece is finished through the main leveling mechanism, then the reversing operation of the cross workpiece is finished through the reversing mechanism, and after the cross workpiece is grabbed and separated from the first bracket, the resetting operation of the first bracket is finished through the reversing mechanism so as to place the next cross workpiece.
Compared with the prior art, the utility model has the advantages that: the utility model provides an automatic indexing device for a cross workpiece, which comprises a main leveling mechanism, wherein the main leveling mechanism can be in friction contact with the outer wall surface of a first shaft of the cross workpiece placed on a first bracket and drive the cross workpiece to rotate around the axis of the first shaft. The automatic cross workpiece indexing device adopts a friction transmission mode to level the cross workpiece placed on the first bracket, has wider applicability and no leveling dead angle, namely, when the cross workpiece is placed on the first bracket, no matter whether the second shaft of the cross workpiece is in a vertical state or is close to the vertical state, the leveling mechanism of the automatic cross workpiece indexing device can level the second shaft of the cross workpiece, and under the cooperation of the controller, the reversing mechanism and the proximity switch, the leveling operation, the reversing operation and the resetting operation of the cross workpiece are automatically completed according to a preset program, the automatic degree is high, the automatic degree can be conveniently applied to the feeding working procedure of the grinding production line of the cross workpiece, the production efficiency is greatly improved, the indexing reliability is remarkably improved, and the production efficiency is greatly improved.
Drawings
FIG. 1 is a schematic perspective view of an automatic indexing device for a cross workpiece according to an embodiment of the present utility model, wherein the automatic indexing device is in an initial state in which the cross workpiece is not placed;
FIG. 2 is a schematic perspective view showing an initial state of the automatic indexing device for a cross workpiece according to an embodiment of the present utility model after the cross workpiece is placed;
FIG. 3 is a schematic perspective view of an automatic indexing device for a cross workpiece according to an embodiment of the present utility model, wherein the cross workpiece is in a leveling state before being shifted, and an auxiliary leveling mechanism is in an initial state;
FIG. 4 is a schematic perspective view of an automatic indexing device for a cross workpiece according to an embodiment of the present utility model, wherein the cross workpiece is in a leveling state before being shifted, and an auxiliary leveling mechanism is propped against two ends of a second shaft of the cross workpiece;
FIG. 5 is a schematic perspective view of an automatic indexing device for a cross workpiece according to an embodiment of the present utility model, wherein the cross workpiece is in a leveling state after reversing;
FIG. 6 is a schematic perspective view of a main leveling mechanism of an automatic indexing device for cross-shaped workpieces and a first bracket according to an embodiment of the present utility model;
fig. 7 is a front view showing a state in which a first shaft of a cross work and a friction wheel assembly of the automatic indexing device for the cross work according to the embodiment of the present utility model are engaged.
Detailed Description
The utility model is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1 to 5, the automatic indexing device for a cross workpiece includes a first bracket 10, a reversing mechanism 20, a main leveling mechanism 30, a proximity switch 40, and a controller (not shown), in this embodiment, the reversing mechanism 20 is fixedly connected to a base 50, specifically, the reversing mechanism 20 includes a rotary cylinder 21 and a rotation shaft 22 driven by the rotary cylinder 21, the rotary cylinder 21 is fixed to the base 50, wherein two first brackets 10 are fixed to the rotation shaft 22 and can rotate along with the rotation shaft 22, specifically, two first brackets 10 are fixedly connected to the rotation shaft 22 through a fixing frame 80 and a first connecting plate 81, wherein the fixing frame 80 is fixed to the rotation shaft 22 and can rotate along with the rotation shaft 22, the first connecting plate 81 is fixedly connected to the fixing frame 80 in this embodiment, the first connecting plate 81 may be a T-shaped slot plate so as to be conveniently connected with other components, specifically, the bottoms of the two first brackets 10 are fixedly connected to the first connecting plate 81, the upper parts of the two first brackets 10 may be used for supporting two ends of a first shaft 101 of the cross workpiece 100 to be ground, more specifically, the rotating cylinder 21 of the reversing mechanism 20 acts to drive the rotating shaft 22 to rotate, the rotating shaft 22 rotates to drive the first bracket 10 to rotate, meanwhile, the cross workpiece 100 to be ground placed on the first bracket 10 can rotate along with the first bracket 10, so that reversing operation of the cross workpiece 100 between a first position and a second position is realized, wherein the first position refers to an initial position where the cross workpiece 100 starts to be placed on the first bracket 10, and the second position refers to a position where the cross workpiece 100 rotates 90 degrees along with the first bracket 10. In this embodiment, the main leveling mechanism 30 is used to adjust the cross workpiece 100 to be ground placed on the first bracket 10 to a horizontal state, so as to facilitate the feeding manipulator (not shown) to grasp two ends of the second shaft 102 of the cross workpiece 100, and specifically, the main leveling mechanism 30 can be in friction contact with an outer wall surface of the first shaft 101 of the cross workpiece 100 placed on the first bracket 10, so as to drive the cross workpiece 100 to rotate around the axis of the first shaft 101. When the second shaft 102 of the cross-shaped workpiece 100 is rotated to a horizontal state, the proximity switch 40 can recognize the state and feed back to the controller. In the present embodiment, the controller communicates with the reversing mechanism 20, the main leveling mechanism 30, and the proximity switch 40, and is capable of controlling the reversing mechanism 20 and the main leveling mechanism 30 to operate according to a preset program.
The automatic indexing device for the cross workpiece in this embodiment adopts a friction transmission mode to level the cross workpiece 100 placed on the first bracket 10, so that the applicability is wider, and no leveling dead angle exists, that is, when the cross workpiece 100 is placed on the first bracket 10, no matter whether the second shaft 102 of the cross workpiece 100 is in a vertical state or is close to the vertical state, the main leveling mechanism 30 of the automatic indexing device for the cross workpiece can level the cross workpiece, and under the cooperation of the controller, the reversing mechanism 20 and the proximity switch 40, the leveling operation, the reversing operation and the resetting operation of the cross workpiece 100 are automatically completed according to a preset program, so that the automatic degree is high, the automatic indexing device can be conveniently applied to the feeding working procedure of the grinding production line of the cross workpiece 100, the reliability of indexing is remarkably improved, and the automatic degree and the production efficiency are greatly improved.
Referring to fig. 2, the main leveling mechanism 30 includes a friction wheel assembly 31 and a first driving device 32 for driving the friction wheel assembly 31 to rotate, specifically, the first driving device 32 is a driving motor, the friction wheel assembly 31 includes a driving wheel 311 and two friction wheels 312 respectively connected with the driving wheel 311 in a driving manner, wherein an output shaft of the driving motor is connected with the driving wheel 311 in a driving manner, the two friction wheels 312 can be matched with two sides of an outer wall surface of the first shaft 101 of the cross workpiece 100, and further drive the cross workpiece 100 to rotate around an axle center of the first shaft 101 in a friction transmission manner. In this embodiment, by arranging two friction wheels 312 to form a holding state on two sides of the outer wall surface of the first shaft 101 of the cross workpiece 100, the friction force applied to the cross workpiece 100 is increased, so that the rotation process of the cross workpiece 100 around the first shaft 101 is more stable, the problem of slipping caused by insufficient friction force applied to the cross workpiece 100 is avoided, and of course, the number of friction wheels 312 can be correspondingly increased according to the mass of the cross workpiece 100 or the friction coefficient of the friction wheels 312, so that the cross workpiece 100 can rotate stably to achieve the leveling purpose. Of course, other friction components, such as friction belts, besides the friction wheel assembly 31 can be adopted by the main leveling mechanism 30, so long as the friction components can be in friction contact with the outer wall surface of the first shaft 101 of the cross workpiece 100 and drive the cross workpiece 100 to rotate around the axis of the first shaft 101 under the driving of the first driving device 32, so as to level the cross workpiece 100.
The friction wheel 312 for friction driving the cross work 100 to rotate around the axis of the first shaft 101 may be provided at any position that can contact the outer wall surface of the first shaft 101 of the cross work 100, as long as the rotation of the friction wheel 312 can drive the cross work 100 to rotate. In this embodiment, in order to increase the friction between the friction wheels 312 and the outer wall surface of the first shaft 101 of the cross work 100, so that the leveling rotation process of the cross work 100 is more convenient to operate, two friction wheels 312 are provided at the upper end of the first bracket 10 and serve to support the end of the first shaft 101 of the cross work 100, specifically, the main leveling mechanism 30 is fixed on the first bracket 10 and can rotate with the first bracket 10, the upper end of the first bracket 10 has two support angles on which the two friction wheels 312 of the main leveling mechanism 30 are fixedly connected by the support bearings 90, respectively, and the end of the first shaft 101 of the cross work 100 can be placed on the two friction wheels 312. In this embodiment, the two friction wheels 312 fixed at the upper end of the first bracket 10 can rub to drive the cross workpiece 100 to rotate on one hand, and can be used to support the cross workpiece 100 on the other hand, so that the cross workpiece 100 is prevented from directly contacting with the first bracket 10, the friction force between the friction wheels 312 and the first shaft 101 of the cross workpiece 100 is greatly increased under the action of self gravity of the cross workpiece 100, and the rotation process of the cross workpiece 100 is further stable and flexible, and the problem of slipping caused by insufficient friction force of the cross workpiece 100 is avoided. More specifically, referring to fig. 7, when the two friction wheels 312 on the first bracket 10 are on the same horizontal plane and the first shaft 101 of the cross-shaped workpiece 100 is placed on the two friction wheels 312, an included angle α formed by two tangent lines of the two friction wheels 312 tangent to the outer wall surface of the first shaft 101 is 30 ° to 150 °, preferably 70 ° to 100 °, at which the friction force of the cross-shaped workpiece 100 is large and the leveling process is smoother. In addition, the driving motor of the main leveling mechanism 30 is also fixed on the first bracket 10, and drives the two friction wheels 312 to rotate by driving the rotation of the driving wheel 311, in this embodiment, the driving wheel 311 drives the two friction wheels 312 to rotate by friction transmission, specifically, referring to fig. 6, an annular caulking groove 313 recessed inwards is formed in the circumferential direction of the driving wheel 311, an O-shaped rubber ring (not shown) is installed in the annular caulking groove 313, and the O-shaped rubber ring can friction drive the two friction wheels 312 to rotate, and of course, it is conceivable for those skilled in the art that transmission between the driving wheel 311 and the two friction wheels 312 can also be realized by adopting a gear transmission, a belt transmission or the like.
The number of the main leveling mechanisms 30 may be two, and the main leveling mechanisms are respectively fixed on the two first brackets 10 and can rotate along with the first brackets 10, that is, one driving motor and friction wheel assembly 31 is fixed on each of the two first brackets 10. In this embodiment, referring to fig. 1 and 2, in order to reduce the number of parts of the main leveling mechanism 30 and simplify the structure of the automatic indexing device for the cross workpiece, the main leveling mechanism 30 may be provided with one, and the main leveling mechanism 30 may be fixed on one of the first brackets 10 and may rotate with the first bracket 10, wherein two friction wheels 312 of the main leveling mechanism 30 may be freely rotatably fixed on an upper end of one of the first brackets 10 through a support bearing 90, and correspondingly, an upper end of the other first bracket 10 may be also fixed with two freely rotatable auxiliary wheels 60 through a support bearing 90, wherein the auxiliary wheels 60 and the friction wheels 312 may be the same size and may be on the same horizontal plane, such that both ends of the first shaft 101 of the cross workpiece 100 may be horizontally placed on the two friction wheels 312 and the two auxiliary wheels 60, respectively. In this embodiment, the two auxiliary wheels 60 are arranged, so that the cross workpiece 100 only needs to be driven at one end of the first shaft 101, and correspondingly, the other end of the first shaft 101 of the cross workpiece 100 also rotates on the auxiliary wheels 60, so that the rotation of the cross workpiece 100 is more flexible, and the number of parts of the main leveling mechanism 30 is reduced.
In this embodiment, the automatic indexing device for a cross workpiece further includes an auxiliary leveling mechanism 70 in communication with the controller, the auxiliary leveling mechanism 70 includes a second driving device 71 and two second brackets 72 driven by the second driving device 71 and capable of moving up and down, the two second brackets 72 can be extended upwards and supported at two ends of the second shaft 102 of the cross workpiece 100 under the driving of the second driving device 71, so that the cross workpiece 100 is kept in a horizontal state, specifically, the bottoms of the two second brackets 72 are connected by a second connecting plate 82, the second connecting plate 82 can be driven by the second driving device 71 and drives the two second brackets 72 to stretch, more specifically, the auxiliary leveling mechanism 70 is fixed on the fixed frame 80 and can rotate along with the rotation of the rotation shaft 22 of the rotation cylinder 21, so as to ensure that the two second brackets 72 of the auxiliary leveling mechanism 70 can be positioned right below the second shaft 102 of the cross workpiece 100, the upper ends of the two second brackets 72 are provided with concave parts 721 for supporting the two ends of the second shaft 102 of the cross workpiece 100, wherein the concave parts 721 of the upper ends of the second brackets 72 can be V-shaped, arc-shaped or other shapes, as long as the limit of the two ends of the second shaft 102 of the cross workpiece 100 can be met, furthermore, the second driving device 71 is a cylinder, specifically, a sliding table cylinder can be adopted, wherein the telescopic stroke of the sliding table cylinder is matched with the position of the sliding table cylinder, the height of the second brackets 72 and the height when the two ends of the second shaft 102 of the cross workpiece 100 are in a horizontal state, to ensure that the second support 72 is supported just below the two ends of the second shaft 102 of the cross-shaped workpiece 100, although other conventional driving devices such as electric driving, hydraulic driving, etc. may be used for the second driving device 71. The auxiliary leveling mechanism 70 is arranged, so that the cross workpiece 100 which is not leveled in place can be finely adjusted and kept in a horizontal state, and the two ends of the second shaft 102 of the cross workpiece 100 can be conveniently grabbed by the feeding mechanical arm. Specifically, after the main leveling mechanism 30 completes the leveling operation, the controller controls the auxiliary leveling mechanism 70 to act, so that the two second brackets 72 are supported at two ends of the second shaft 102 of the cross workpiece 100, so that the feeding manipulator can grasp the cross workpiece 100 or the automatic indexing device of the cross workpiece can conveniently perform the next reversing operation.
In this embodiment, the control method of the automatic indexing device for the cross workpiece includes a reversing step, a leveling step and a resetting step, wherein the reversing step is that the controller controls the reversing mechanism 20 to drive the first bracket 10 to rotate, and the cross workpiece 100 to be ground placed on the first bracket 10 can rotate together with the first bracket 10 to complete the reversing operation. In the leveling step, the controller controls the first driving device 32 of the main leveling mechanism 30 to drive the friction wheel assembly 31 to rotate, so as to drive the cross workpiece 100 in friction contact with the friction wheel assembly 31 to rotate around the axis of the first shaft 101 of the cross workpiece 100, and when the second shaft 102 of the cross workpiece 100 rotates to be in a horizontal state or is close to the horizontal state, the proximity switch 40 can identify the state and feed back the signal to the controller, and the controller controls the first driving device 32 to be closed, so that the leveling operation of the cross workpiece 100 is completed. The resetting step is that after the cross workpiece 100 is grabbed and separated from the first bracket 10, the controller controls the reversing mechanism 20 to drive the first bracket 10 to rotate to the initial position, so as to complete the resetting operation. Referring to fig. 2 to 5, in the present embodiment, the automatic indexing device for a cross workpiece is operated according to a procedure of performing a leveling step, then performing a reversing step, and finally performing a resetting step, that is, according to a preset procedure, the controller performs the leveling operation of the cross workpiece 100 by controlling the main leveling mechanism 30, then performs the reversing operation of the cross workpiece 100 by controlling the reversing mechanism 20, and after the cross workpiece 100 is grabbed and separated from the first bracket 10, performs the resetting operation of the first bracket 10 by controlling the reversing mechanism 20, so as to place the next cross workpiece 100, wherein, since the automatic indexing device performs the leveling operation first, the proximity switch 40 capable of identifying the leveling state of the cross workpiece 100 can be fixed on the base 50 through the one upright 83 and can be close to one end of the second shaft 102 of the initially placed cross workpiece 100. More specifically, referring to fig. 3 and 4, after the leveling operation of the cross workpiece 100 placed on the first bracket 10 is completed by the main leveling mechanism 30, the controller may control the auxiliary leveling mechanism 70 to act, so that the second bracket 72 is propped against two ends of the second shaft 102 of the cross workpiece 100, and further, the cross workpiece 100 which is not leveled in place can be finely tuned and kept in a horizontal state, where the recess 721 at the upper end of the second bracket 72 can be blocked and held at the end of the second shaft 102 of the cross workpiece 100, so that the cross workpiece 100 which is leveled is prevented from rotating to be in a non-leveling state due to the fact that the second shaft 102 is not supported when the cross workpiece 100 is subjected to the next reversing operation, and the next feeding manipulator is affected to grasp the cross workpiece. Referring to fig. 5, the cross-shaped workpiece 100 is shown in a state in which the second bracket 72 of the auxiliary leveling mechanism 70 is propped against two ends of the second shaft 102 of the cross-shaped workpiece 100, and then the reversing mechanism 20 is used for reversing the cross-shaped workpiece. When the cross workpiece 100 is grabbed and separated from the first bracket 10 during the operation according to the setting program, the controller can control the cylinder of the auxiliary leveling mechanism 70 to shrink and return to the initial state, so as to avoid affecting the placement or leveling of the next cross workpiece 100. Of course, when the friction force between the main leveling mechanism 30 and the first shaft 101 of the cross workpiece 100 is large, that is, when the reversing operation is performed, the leveling-already-leveled cross workpiece 100 is not deviated from the horizontal state, the auxiliary leveling mechanism 70 can be omitted, so as to reduce the number of parts and operation steps, and improve the production efficiency.
Of course, as another embodiment, the automatic indexing device of the cross workpiece may also operate according to the procedure of performing the reversing step, the leveling step and the reset step, wherein when the automatic indexing device of the cross workpiece operates according to the setting procedure, the automatic indexing device of the cross workpiece rotates by 90 degrees through the reversing mechanism 20 under the control of the controller to complete the reversing of the positions of the first shaft 101 and the second shaft 102 of the cross workpiece 100, then the leveling operation of the cross workpiece 100 is completed through the main leveling mechanism 30, and after the cross workpiece 100 is grabbed and separated from the first bracket 10, the reset operation of the first bracket 10 is completed through the reversing mechanism 20, so as to place the next cross workpiece 100. It will be appreciated by those skilled in the art that, since the automatic indexing device performs the leveling operation after the reversing operation, the proximity switch 40 capable of identifying the leveling state of the cross workpiece 100 may be fixed to the base 50 by a vertical rod 83 and may be close to one end of the second shaft 102 of the cross workpiece 100 after the reversing operation is completed, or the proximity switch 40 may be directly fixed to the rotating shaft 22 of the rotating cylinder 21 so as to be capable of rotating with the cross workpiece 100 and always close to one end of the second shaft 102 of the cross workpiece 100, so as to identify the leveling state of the cross workpiece 100. Similarly, when the cross workpiece 100 placed on the first bracket 10 is operated according to the set program, after the leveling operation is completed through the main leveling mechanism 30, the controller can control the auxiliary leveling mechanism 70 to act, so that the second bracket 72 is propped against two ends of the second shaft 102 of the cross workpiece 100, and further, the cross workpiece 100 which is not leveled in place can be finely tuned and kept in a horizontal state, so that the feeding manipulator can grab two ends of the second shaft 102 of the cross workpiece 100, and after the cross workpiece 100 is grabbed and separated from the first bracket 10, the controller can control the cylinder of the auxiliary leveling mechanism 70 to shrink back to the initial state, thereby avoiding affecting the placement or leveling operation of the next cross workpiece 100. Of course, when the control precision of the main leveling mechanism 30 is higher and the delay time of the feedback of the proximity switch 40 is shorter, the cross workpiece 100 can be in a horizontal state where the feeding manipulator can grasp the second shaft 102 of the cross workpiece 100 conveniently only by the main leveling mechanism 30, and the auxiliary leveling mechanism 70 can be omitted, so as to reduce the number of parts and operation steps, and improve the production efficiency.
The foregoing description of the preferred embodiment of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (6)
1. An automatic indexing device for a cross-shaped workpiece, comprising:
a first bracket (10), wherein the first bracket (10) is respectively used for supporting two ends of a first shaft (101) of a cross workpiece (100) to be ground;
the reversing mechanism (20) can drive the first bracket (10) to rotate, and correspondingly, a cross workpiece (100) to be ground, which is placed on the first bracket (10), can rotate along with the first bracket (10);
the method is characterized in that: the device further comprises a main leveling mechanism (30) which can be in friction contact with the outer wall surface of a first shaft (101) of the cross workpiece (100) placed on the first bracket (10), and the main leveling mechanism (30) can be used for friction driving the cross workpiece (100) to rotate around the axis direction of the first shaft (101); a kind of electronic device with high-pressure air-conditioning system
A proximity switch (40), the proximity switch (40) being capable of identifying whether a second shaft (102) of the cross-shaped workpiece (100) is rotated to a horizontal state;
the controller is communicated with the reversing mechanism (20), the main leveling mechanism (30) and the proximity switch (40) and controls the reversing mechanism (20) and the main leveling mechanism (30) to act according to a preset program;
the auxiliary leveling mechanism (70) is communicated with the controller, and the auxiliary leveling mechanism (70) comprises a second driving device (71) and two second brackets (72) which are driven by the second driving device (71) and can move up and down;
two second brackets (72) can be propped against two ends of a second shaft (102) of the cross workpiece (100) under the drive of the second driving device (71), so that the cross workpiece (100) is in a horizontal state;
the main leveling mechanism (30) comprises a friction wheel assembly (31) and a first driving device (32) for driving the friction wheel assembly (31) to rotate;
the outer wall surface of a first shaft (101) of the cross-shaped workpiece (100) is in friction contact with the friction wheel assembly (31), wherein the rotation of the friction wheel assembly (31) can drive the cross-shaped workpiece (100) to rotate around the axis of the first shaft (101);
the friction wheel assembly (31) comprises a driving wheel (311) and two friction wheels (312) which are respectively connected with the driving wheel (311) in a transmission way, and the two friction wheels (312) can be matched with two sides of the outer wall surface of the first shaft (101) of the cross workpiece (100) so as to drive the cross workpiece (100) to rotate;
the value range of an included angle (alpha) formed by two tangents of the two friction wheels (312) and the outer wall surface of the first shaft (101) is 30-150 degrees;
the two main leveling mechanisms (30) are respectively fixed on the two first brackets (10) and can rotate along with the first brackets (10), two friction wheels (312) of the main leveling mechanism (30) are rotatably fixed at the upper ends of the first brackets (10), and two ends of a first shaft (101) of the cross workpiece (100) can be respectively placed on the two friction wheels (312) of the two main leveling mechanisms (30); or alternatively
The main leveling mechanism (30) is provided with one, is fixed on one of the first brackets (10) and can rotate along with the first brackets (10), two friction wheels (312) of the main leveling mechanism (30) are rotatably fixed at the upper end of the first brackets (10), and correspondingly, the upper end of the other first bracket (10) is fixedly provided with two auxiliary wheels (60) capable of rotating freely, wherein two ends of a first shaft (101) of the cross workpiece (100) can be placed on the two friction wheels (312) and the two auxiliary wheels (60) respectively.
2. The automatic indexing device for cross-shaped workpieces according to claim 1, wherein:
the first driving device (32) is a driving motor, and an output shaft of the driving motor is in driving connection with the driving wheel (311).
3. The automatic indexing device for a cross-shaped workpiece according to claim 1 or 2, characterized in that: the upper ends of the two second brackets (72) are provided with concave parts (721) for supporting the two end parts of the second shaft (102) of the cross-shaped workpiece (100);
the second driving device (71) is a cylinder.
4. An automatic indexing device for a cross-shaped workpiece according to claim 3, wherein: the reversing mechanism (20) comprises a rotary cylinder (21) and a rotating shaft (22) driven by the rotary cylinder (21);
the two first brackets (10) are fixedly connected to the rotating shaft (22) and can rotate along with the rotating shaft (22) of the rotating cylinder (21).
5. A control method of the automatic indexing device for a cross workpiece according to any one of claims 1 to 4, characterized by comprising the steps of:
reversing: the controller controls the reversing mechanism (20) to drive the first bracket (10) to rotate, and a cross workpiece (100) to be ground, which is placed on the first bracket (10), can rotate along with the first bracket (10) to finish reversing operation;
leveling: the controller controls a first driving device (32) of the main leveling mechanism (30) to drive the friction wheel assembly (31) to rotate so as to drive a cross workpiece (100) in friction contact with the friction wheel assembly (31) to rotate around the axis of a first shaft (101) of the cross workpiece (100), and when a second shaft (102) of the cross workpiece (100) rotates to be in a horizontal state or is close to the horizontal state, the proximity switch (40) can identify the state and feed back the signal to the controller, and the controller controls the first driving device (32) to be closed so as to finish leveling operation of the cross workpiece (100);
resetting: when the cross workpiece (100) is grabbed and separated from the first bracket (10), the controller controls the reversing mechanism (20) to drive the first bracket (10) to rotate to an initial position, and reset operation is completed.
6. The method for controlling an automatic indexing device for a cross-shaped workpiece according to claim 5, wherein: under the control of a controller, the reversing operation of the cross workpiece (100) is finished through the reversing mechanism (20), then the leveling operation of the cross workpiece (100) is finished through the main leveling mechanism (30), and after the cross workpiece (100) is grabbed and separated from the first bracket (10), the resetting operation of the first bracket (10) is finished through the reversing mechanism (20) so as to place the next cross workpiece (100);
or under the control of the controller, the leveling operation of the cross workpiece (100) is finished through the main leveling mechanism (30), then the reversing operation of the cross workpiece (100) is finished through the reversing mechanism (20), and after the cross workpiece (100) is grabbed and separated from the first bracket (10), the resetting operation of the first bracket (10) is finished through the reversing mechanism (20) so as to place the next cross workpiece (100).
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