CN108015740B - Extension bar parallel type automatic scribing device - Google Patents
Extension bar parallel type automatic scribing device Download PDFInfo
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- CN108015740B CN108015740B CN201711138059.7A CN201711138059A CN108015740B CN 108015740 B CN108015740 B CN 108015740B CN 201711138059 A CN201711138059 A CN 201711138059A CN 108015740 B CN108015740 B CN 108015740B
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- scribing
- sliding rail
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- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 210000000078 claw Anatomy 0.000 claims abstract description 30
- 239000010720 hydraulic oil Substances 0.000 claims description 23
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 4
- 241000357216 Oplegnathus woodwardi Species 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H7/00—Marking-out or setting-out work
- B25H7/04—Devices, e.g. scribers, for marking
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses an extension bar parallel automatic scribing device, which comprises a workbench, wherein a plurality of sliding rails which can move on the workbench and are parallel to each other are arranged on the workbench at intervals, and clamping mechanisms for fixing workpieces are arranged on the sliding rails; the center of the workbench is provided with a scribing mechanism, the scribing mechanism comprises cutter holders which are perpendicular to the sliding rails and are positioned above the sliding rails, the cutter holders are provided with blade claws the same as the sliding rails in number, and the blade claws can move along the axial direction perpendicular to or parallel to the sliding rails. The device has the advantages of high intelligent degree, safety, reliability, high accuracy, high efficiency, high product quality, low cost, time and labor saving, wide application range and the like.
Description
Technical Field
The invention relates to the technical field of machining, in particular to an extension bar parallel type automatic scribing device.
Background
Currently, with the advancement of technology, most machine manufacturers basically implement automation or semi-automation in the mold processing mode. The stand column is used as a main supporting component of the hydraulic support and is used for bearing the load of the top plate, and the stand column is generally provided with a single telescopic stand column and a double telescopic stand column, and has the characteristics of high reliability, simple structure, low processing cost, large expansion ratio and the like. The extension bar is used as a main part of the upright post, and the processing technology requirement is strict; the scribing is the most important one-step process of the extension rod, and the accuracy of scribing positioning must be ensured.
However, most post machine manufacturers still use manual or hand-operated mechanical scoring in connection with the extension rod scoring process, and these conventional scoring processes suffer from a number of drawbacks: 1. when a worker is scribing, the extension bar is not easy to fix firmly on the scribing platform, and phenomena such as rolling and sliding can possibly occur, so that the reference positioning is inaccurate, and the scribing precision is reduced. Repeated scribing is often carried out, time and labor are consumed, and the processing cost of enterprises is increased. 2. The extension bar belongs to a large bar workpiece, has large size and large weight, and can generate production accidents such as smashing injury, extrusion and the like when rolling, sliding and the like occur. 3. When a worker makes a line, only a single extension bar can be made at a time, the line making efficiency is low, and the enterprise benefit is reduced. 4. The manual scribing or manual mechanical scribing mode has inaccurate reference positioning, so that scribing errors are increased. 5. The degree of intellectualization of manual scribing or mechanical scribing is low. 6. The qualification rate of the scribing products is lower.
Disclosure of Invention
The invention aims to provide an extension bar parallel type automatic scribing device which is used for solving the problems of low precision, low efficiency, low qualification rate, poor safety, high cost and the like in the conventional extension bar scribing process.
In order to realize the tasks, the invention adopts the following technical scheme:
the parallel automatic scribing device for the extension bar comprises a workbench, wherein a plurality of sliding rails which can move on the workbench and are parallel to each other are arranged on the workbench at intervals, and a clamping mechanism for fixing a workpiece is arranged on the sliding rails; the center of the workbench is provided with a scribing mechanism, the scribing mechanism comprises cutter holders which are perpendicular to the sliding rails and are positioned above the sliding rails, the cutter holders are provided with blade claws the same as the sliding rails in number, and the blade claws can move along the axial direction perpendicular to or parallel to the sliding rails.
Further, a pair of mounting tables are arranged on the workbench, mounting holes are formed in the mounting tables, a screw rod penetrates through the mounting holes, and one end of the screw rod is connected with a servo motor arranged on the workbench through an elastic coupling and a contact bearing; the screw rod between the pair of mounting tables is provided with a sliding block, the sliding block is provided with a first hydraulic oil cylinder, the tool rest is arranged on an output shaft of the first hydraulic oil cylinder, and the tool rest is perpendicular to the sliding rail.
Further, a pressure sensor is arranged between the blade claw and the tool rest.
Further, a position sensor and an encoder are arranged at the tail end of the screw rod.
Further, the blade claw is formed by connecting two arc-shaped blades from the middle part, and the blade claw is of a crisscross arc-shaped structure.
Further, the clamping mechanism comprises a first clamping frame and a second clamping frame, wherein the first clamping frame is fixed at one end of the sliding rail, and a positioning plate is arranged on the first clamping frame; the second clamping frame can move along the axial direction of the sliding rail.
Further, the first clamping frame comprises clamping blocks which are symmetrically arranged, an arc-shaped clamping surface is processed from the top surface of each clamping block to the side surface of each clamping block, and a plurality of clamping grooves with the same interval are formed in the bottom of each clamping block; the locating plate is located on one side of the clamping surface, and a plurality of clamping blocks matched with the clamping grooves are paved on the sliding rail at equal intervals along the axial direction of the sliding rail.
Further, a second hydraulic oil cylinder is arranged at the end part of the workbench, and a pushing plate capable of moving up and down is arranged on an output shaft of the second hydraulic oil cylinder; the output shaft of the second hydraulic cylinder is vertically provided with a clamping tube, the side surface of the clamping tube is provided with a strip-shaped groove along the axial direction, a sliding shaft is arranged in the clamping tube, and the sliding shaft is connected with the pushing plate through a connecting plate penetrating through the strip-shaped groove; the bottom of the clamping tube is provided with an electric telescopic rod, and the axial direction of the electric telescopic rod is parallel to the axial direction of the clamping tube; the output shaft of the electric telescopic rod is connected with the pushing plate through a connecting rod.
Further, a first displacement sensor is arranged on the first hydraulic oil cylinder, and a second displacement sensor is arranged on the second hydraulic oil cylinder; the first hydraulic cylinder and the second hydraulic cylinder are connected to the hydraulic pump through a first electromagnetic directional valve and a second electromagnetic directional valve respectively.
Further, the servo motor, the first hydraulic cylinder and the second hydraulic cylinder are controlled by a PLC.
The invention has the following technical characteristics:
the positioning scribing device can realize accurate scribing positioning, the scribing error is strictly controlled within the standard range of dimensional tolerance, and the problem of low accuracy during manual scribing is solved; through the movable workpiece clamping mechanism, the extension bar is prevented from rolling, sliding and the like in the scribing process, and the scribing of various products is realized, so that the extension bar is not limited to the extension bar. Determining a scribing reference through a position sensor and a displacement sensor, realizing positioning scribing, and solving the error existing in the determination of the scribing reference; the parallel connection mode and the scribing operation mode are combined to realize one-time scribing of a plurality of products, so that the scribing efficiency is improved, and the processing cost is saved; the whole process adopts automatic control operation, so that the probability of accident occurrence caused by irregular operation of workers is greatly reduced, and the safety is higher. The device is easy to operate, high in intelligent degree and low in technical requirements on staff. In general, the device has the advantages of safety, reliability, high accuracy, high efficiency, high product quality, low cost, time and labor saving, wider application range and the like.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention:
fig. 2 is a schematic diagram of the front view structure of the present invention:
fig. 3 is a schematic top view of the present invention:
fig. 4 is a right-side view of the present invention:
FIG. 5 is a schematic view of the structure of the first clamping frame portion;
FIG. 6 is a schematic side view of a second hydraulic ram and thrust plate portion;
FIG. 7 is a schematic top view of a cartridge portion;
FIG. 8 is a schematic diagram of the control function of the PLC according to the embodiment of the invention;
the reference numerals in the figures represent: 1-a workbench; 2-a servo motor; 3-a sliding rail; 4-a clamping mechanism; 5-a positioning plate; 6, a workpiece; 7-blade claws; 8-a knife rest; 9-a position sensor; 10-an encoder; 11-a lead screw; 12-a second clamping frame; 13-a first clamping frame; 14-elastic coupling; 15-a nut and a washer; 16-contact bearings; 17-a pressure sensor; 18-a first hydraulic cylinder; 19-a first displacement sensor; 20-a first electromagnetic directional valve; 21-clamping blocks; 22-a second electromagnetic directional valve; 23-a second hydraulic cylinder; 24-pushing plate; 25-second displacement sensor, 26-clamping surface, 27-clamping groove, 28-clamping block, 29-clamping tube, 30-electric telescopic rod, 31-connecting rod, 32-connecting plate and 33-sliding shaft.
Detailed Description
As shown in fig. 1 to 5, the invention discloses an extension bar parallel automatic scribing device, which comprises a workbench 1, wherein a plurality of sliding rails 3 which can move on the workbench 1 and are parallel to each other are arranged on the workbench 1 at intervals, and a clamping mechanism 4 for fixing a workpiece 6 (extension bar) is arranged on the sliding rails 3; the center of the workbench 1 is provided with a scribing mechanism, the scribing mechanism comprises a cutter rest 8 which is perpendicular to the sliding rail 3 and is positioned above the sliding rail 3, the cutter rest 8 is provided with blade claws 7 the same as the sliding rail 3 in number, and the blade claws 7 can move along the axial direction perpendicular to or parallel to the sliding rail 3.
The workbench 1 in the invention is optionally a rectangular platform with a plane upper surface; a plurality of strip-shaped sliding rails 3 are arranged on the platform, and the sliding rails 3 can move on the workbench 1; specifically, a plurality of mutually parallel adjusting grooves are arranged on the upper surface of the workbench 1 at intervals, and preferably, the intervals of the adjusting grooves are the same so as to be matched with the scribing mechanism better; the bottom of the slide rail 3 is fitted in the adjustment groove by a slide block so that the slide rail 3 can move along the adjustment groove. The slide rail 3 adopts the structural design of adjustable position, is in consideration of factors such as in actual industrial process, in order to cooperate with the mounted position of work piece 6 hoist and mount mechanism, needs to confirm the mounted position of slide rail 3 according to actual conditions, and after the position of slide rail 3 is confirmed, passes through the bolt fastening with slide rail 3 on workstation 1.
The slide rail 3 is provided with a clamping mechanism 4 for fixing the workpiece 6, and as shown in fig. 1, 4 and 5, the clamping mechanism 4 is used for fixing two ends of the workpiece 6, so that the workpiece 6 can be effectively fixed, and the subsequent scribing is facilitated. The scribing is achieved by a scribing mechanism, in particular, the scribing mechanism is installed in the middle of the workbench 1, namely at the center of all the sliding rails 3, and the purpose of the scribing mechanism is to balance the tool rest 8 left and right, so that each blade claw 7 can better contact with the workpiece 6 and scribe. The scribing mechanism is provided with a strip-shaped cutter rest 8, the cutter rest 8 is positioned above all the sliding rails 3, and a blade claw 7 arranged at the bottom of the cutter rest 8 is used for scribing the workpiece 6.
In actual use, the position of the slide rail 3 on the workbench 1 is adjusted and fixed, and then the position of the clamping mechanism 4 on the slide rail 3 is adjusted and fixed, so that all the clamping mechanisms 4 are aligned with each other, and the positions of the workpieces 6 after being placed on the clamping mechanisms 4 can be aligned with each other. And a workpiece 6 is placed in the clamping mechanism 4 on each sliding rail 3 by using a hoisting mechanism, then the tool rest 8 is moved downwards until the blade claw 7 is contacted with the surface of the workpiece 6, and then the blade claw 7 is moved along the axial direction parallel to the sliding rails 3, so that scribing can be performed on the surface of the workpiece 6 through the blade claw 7. Because the parallel structure is adopted in the scheme and the workpiece 6 is clamped and fixed, accurate scribing positioning can be realized, rolling and sliding phenomena of the workpiece 6 are avoided, scribing of a plurality of workpieces 6 can be performed at one time, and scribing efficiency is effectively improved.
As shown in fig. 1, 4 and 6, the workbench 1 is provided with a pair of mounting tables, mounting holes are formed in the mounting tables, a screw rod 11 is arranged through the mounting holes, and a bearing is arranged between the mounting holes and the screw rod 11; one end of the screw rod 11 is connected with a servo motor 2 arranged on the workbench 1 through an elastic coupling 14 and a contact bearing 16; the screw rod 11 between the pair of mounting tables is provided with a sliding block, the sliding block is in threaded fit with the screw rod 11, the bottom of the sliding block is provided with a T-shaped block, and the sliding block is assembled in a T-shaped groove formed in the workbench 1, so that when the screw rod 11 rotates, the sliding block can move along the axial direction of the screw rod 11 and does not rotate; the sliding block is provided with a first hydraulic oil cylinder 18, the tool rest 8 is arranged on an output shaft of the first hydraulic oil cylinder 18, the tool rest 8 is perpendicular to the sliding rail 3, and the tool rest 8 is parallel to the upper surface of the workbench 1. The above structure is a driving mechanism of the blade claw 7 for realizing contact of the blade claw 7 with the workpiece 6 and scribing of the surface of the workpiece 6. Specifically, the position of the tool holder 8 in the vertical direction is adjusted by the first hydraulic cylinder 18 so that the blade claw 7 is brought into surface contact with the workpiece 6; the position of the slide block is adjusted by the rotation of the screw rod 11, and the slide block moves to drive the blade claw 7 to axially move on the surface of the workpiece 6 so as to scribe. When scribing is completed, the cutter holder 8 is lifted by the first hydraulic oil cylinder 18, the blade claw 7 is separated from contact with the surface of the workpiece 6, and then the workpiece 6 is taken down. The blade claw 7 is formed by connecting two arc-shaped blades from the middle part, and the blade claw 7 is of a crisscross arc-shaped structure; optionally, the blade jaw 7 is detachably provided with a color-coatable crisscross arcuate blade sleeve. The distance between the centers of adjacent blade claws 7 is the same as the distance between the centers of said adjacent slide rails 3 so that each blade claw 7 can correspond exactly to the position of the workpiece 6 on its lower slide rail 3. The screw 11 is provided with a nut and washer 15 for adjusting the slide on the screw 11.
As shown in fig. 4, a pressure sensor is provided between the blade jaw 7 and the blade holder 8. The pressure sensor 17 is used for measuring a pressure signal when the knife rest 8 moves downwards, if the knife jaw 7 contacts with the surface of the workpiece 6, the pressure sensor 17 can determine that the position of the knife jaw 7 is proper through the pressure signal, then the first hydraulic oil cylinder 18 is stopped to be driven, and the servo motor 2 is driven to start scribing the knife jaw 7. Another function of the pressure sensor 17 is to monitor the contact pressure of the blade jaw 7 with the surface of the workpiece 6, so that the scribing depth of the blade jaw 7 can be adjusted. The tail end of the lead screw 11 is provided with a position sensor 9 and an encoder 10, wherein the encoder 10 is used for recording the rotating speed of the lead screw 11, the displacement sensor 13 is used for recording the position of the sliding block, and the two are matched to determine the scribing reference, so that positioning scribing is realized, and the problem of error in determining the scribing reference in the prior art is solved.
As shown in fig. 1 and 5, the clamping mechanism 4 optionally comprises a first clamping frame 13 and a second clamping frame 12, wherein the first clamping frame 13 is fixed at one end of the sliding rail 3, and the first clamping frame 13 is provided with a positioning plate 5; the second clamping frame 12 can move along the axial direction of the sliding rail 3. Taking fig. 1 as an example, the first clamping frame 13 is at the front end of the sliding rail 3 and is close to the servo motor 2, and the first clamping frame 13 is fixed. The second clamping frame 12 is adjustable in position, and the position of the second clamping frame 12 can be adjusted to enable different distances between the first clamping frame 13 and the second clamping frame 12 to be generated so as to adapt to different sizes of workpieces 6. After the position of the second clamping frame 12 is adjusted, the second clamping frame 12 is fixed on the sliding rail 3 through bolts.
Specifically, the first clamping frame 13 includes symmetrically arranged clamping blocks 21, an arc-shaped clamping surface 26 is machined from the top surface of the clamping block 21 to the side surface direction of the clamping block 21, and the clamping surfaces 26 on the two clamping blocks 21 are used for placing and fixing the workpiece 6 together; the workpiece 6 is generally in a cylindrical structure, so that the clamping surface 26 adopts an arc-shaped structure design, so that the clamping surface can better adapt to the shape of the workpiece 6, and the workpiece 6 is effectively fixed; the bottom of the clamping block 21 is provided with a plurality of clamping grooves 27 with the same interval; the locating plate 5 is located at one side of the clamping surface 26, and a plurality of clamping blocks 28 matched with the clamping grooves 27 are paved on the sliding rail 3 at equal intervals along the axial direction of the sliding rail 3. The spacing between the clamping blocks 28 is the same as the spacing between the clamping grooves 27, and different spacing can be generated between the clamping blocks 21 by inserting the clamping grooves 27 on the clamping blocks 21 into different clamping blocks 28, so that the clamping mechanism 4 can be used for placing cylindrical workpieces 6, rectangular workpieces 6 and workpieces 6 with other shapes with different shaft diameters, and the diversity of scribing functions is realized. After the spacing between the clamping blocks 21 of the first clamping frames 13 is adjusted, fixing the clamping blocks by bolts, and enabling the positions of the first clamping frames 13 on all the sliding rails 3 to be on the same straight line; the second clamping frame 12 has substantially the same structure as the first clamping frame 13, except that the second clamping frame 12 has no positioning plate 5 thereon, and the rest has the same structure. After the spacing between the clamping blocks 21 of the second clamping frame 12 is adjusted, the second clamping frame 12 can be pushed on the sliding rail 3 so as to adjust the spacing between the first clamping frame 13 and the second clamping frame 12, and the clamping blocks are fixed through bolts after the positions of the clamping blocks are proper.
The positioning plate 5 has the function of positioning when the workpiece 6 is placed; when placing the workpiece 6, firstly, one end of the workpiece 6 is placed on the first clamping frame 13 by using the hoisting mechanism, the end of the workpiece 6 is propped against the positioning plate 5, and then the other end of the workpiece 6 is placed; because all the first clamping frames 13 are positioned on the same straight line, after the end parts of the workpieces 6 are propped against the positioning plate 5 and put down, the end parts of all the workpieces 6 can be identical, so that the positions of the workpieces 6 on all the slide rails 3 are identical, and the scribing is more accurate.
Preferably, in order to facilitate the adjustment of the position of the slide rail 3 and the second clamping frame 12 before the position is fixed, in the scheme, a second hydraulic cylinder 23 is installed at the end part of the workbench 1, and a pushing plate 24 capable of moving up and down is installed on an output shaft of the second hydraulic cylinder 23; the output shaft of the second hydraulic cylinder 23 is vertically provided with a clamping tube 29, the side surface of the clamping tube 29 is axially provided with a strip-shaped groove, a sliding shaft 33 is arranged in the clamping tube 29, and the sliding shaft 33 is connected with the pushing plate 24 through a connecting plate 32 penetrating through the strip-shaped groove; the bottom of the clamping tube 29 is provided with an electric telescopic rod 30, and the axial direction of the electric telescopic rod 30 is parallel to the axial direction of the clamping tube 29; the output shaft of the electric telescopic rod 30 is connected with the pushing plate 24 through a connecting rod 31. As shown in fig. 2 and 6, the horizontal position of the second clamping frame 12 is higher, the horizontal position of the sliding rail 3 is lower, and the pushing plate 24 realizes the adjustment of the positions of the sliding rail 3 and the second clamping frame 12 according to the requirement. Specifically, when the positions of all the sliding rails 3 on the workbench 1 need to be adjusted, the electric telescopic rods 30 are extended to enable the positions of the pushing plates 24 to be lowered, then the pushing plates 24 are pushed by the second hydraulic oil cylinders 23, the pushing plates 24 are gradually contacted with the end portions of the sliding rails 3, and the sliding rails 3 are pushed to reach the proper positions for fixing. When the position of the second clamping frame 12 needs to be adjusted, the electric telescopic rod 30 is contracted, so that the position of the pushing plate 24 is raised, and then the second clamping frame 12 is pushed to adjust the distance between the pushing plate and the first clamping frame 13. The pushing plate 24 structure ensures that the position adjustment of the sliding rail 3 and the position adjustment of the second clamping frame 12 are not affected, and simultaneously ensures the consistency of the different sliding rails 3 and the second clamping frames 12 in the position adjustment.
More specifically, the first hydraulic cylinder 18 is provided with a first displacement sensor 19, and the second hydraulic cylinder 23 is provided with a second displacement sensor 25; the displacement sensor 13 is used for monitoring the stroke of the output shaft of the hydraulic cylinder so as to electrically control the output shaft of the hydraulic cylinder; the first hydraulic cylinder 18 and the second hydraulic cylinder 23 are connected to the hydraulic pump through the first electromagnetic directional valve 20 and the second electromagnetic directional valve 22, respectively, so that the two hydraulic cylinders can be controlled through the cooperation of one hydraulic pump and the electromagnetic directional valve.
The scheme can be used for marking through automatic control, the servo motor 2, the first hydraulic oil cylinder 18 and the second hydraulic oil cylinder 23 are controlled through a PLC controller, and the electronic components such as the sensors, the encoder 10, the electromagnetic reversing valve, the hydraulic pump and the like are connected with the PLC controller to receive control or provide information.
The control system of the scheme is shown in fig. 8, and comprises a 360V power supply, a soft starter, a servo motor 2, a low-voltage electric appliance, a PIZZ safety relay, a PLC controller and a touch display panel. The soft starter plays a role in stabilizing voltage and stabilizing current and ensures stable operation of the servo motor 2, the PIZZ safety relay can realize an emergency stop control function, the touch display panel is in communication connection with the PLC controller, a control signal output end of the PLC is connected with a control signal input end of the servo motor 2, a control signal output end of the PLC is connected with input ends of the first electromagnetic directional valve 20 and the second electromagnetic directional valve 22, and relevant technical parameters of scribing are input on the touch display panel, so that the servo motor 2 is driven to move through the PLC control output end to drive the lead screw 11 to move so as to complete scribing operation.
The low-voltage electrical appliance and the PLC are used for controlling the switch, forward rotation and reverse rotation of the servo motor 2 and the extension and retraction of a piston rod of the first hydraulic oil cylinder 18 to realize vertical up-and-down reciprocating motion and the extension and retraction of a piston rod of the second hydraulic oil cylinder 23 to realize horizontal reciprocating motion. The input switching value (0/1) of the PLC comprises a switch SB1, a forward rotation switch SB2, a reverse rotation switch SB3 of the servo motor 2, an extension switch SB4, a contraction switch SB5 of a piston rod of the first hydraulic cylinder 18, an extension switch SB6, a contraction switch SB7, a proximity switch SQ1 and a proximity switch SQ2 of a piston rod of the second hydraulic cylinder 23, a switch SQ2 of the pressure sensor 17 and the coding switch SQ3.
The output signals of the PLC comprise a switch signal A1, forward and reverse rotation signals A3 and A4 and an asymptotic contact displacement display signal of the servo motor 2. The PLC is in communication connection with the touch display panel and is used for realizing a man-machine interaction function. The touch display panel can carry out input of switching value and setting of parameters, and the touch display panel can read and display the output quantity of the PLC output module, such as: the state of the motor 2 shows the action state of the hydraulic cylinder, and the movement displacement of the scribing device.
When the workpiece 6 needs to be positioned and marked, firstly, the workpiece 6 to be processed is hung on each separable clamping mechanism fixed on the workbench 1, a control system is started, an extension switch SB6 of a second hydraulic oil cylinder 23 is started in a touch display panel, the workpiece 6 is contacted with the positioning plate 5 under the thrust action of the second hydraulic oil cylinder 23, and the end part of the workpiece 6 is aligned with one end of the clamping mechanism; then, the contraction switch SB7 of the second hydraulic cylinder 23 is activated, and the piston rod of the second hydraulic cylinder 23 returns to the original position.
Secondly, according to the drawing size requirement of the processed workpiece 6, scribing parameters are input into a parameter setting area on the touch display panel, a forward rotation key of the servo motor 2 is started, the rotation number of turns of an output shaft of the servo motor 2 can be controlled through control of a PLC and a low-voltage electrical appliance, and the servo motor 2 drives the screw rod 11 to rotate together through an elastic coupling 14. The circular motion of the screw 11 can be converted into linear motion of the slider, so that the second hydraulic cylinder 23 mounted on the slider performs corresponding linear motion, and stops moving when reaching a preset position. Then, a first hydraulic cylinder 18 and a shrinkage switch SB5 of a piston rod on the touch display panel are started, the piston rod of the first hydraulic cylinder 18 is shrunk to drive the tool rest 8 to vertically move downwards, when the pressure sensor 17 on the blade claw 7 contacts the workpiece 6, namely, when the pressure sensor 17 receives a force signal, the switching value signal of the pressure sensor 17 and the shrinkage of the piston rod of the first hydraulic cylinder 18 and the descending function of the tool rest 8 are released through the processing and control of the PLC, and then the servo motor 2 is used for driving the blade claw 7 to realize scribing operation on the workpiece 6.
Finally, the extension switch SB4 of the piston rod of the first hydraulic cylinder 18 is started, the tool rest 8 returns to the initial position, and if the piston rod of the first hydraulic cylinder 18 passes through the first displacement sensor 19 during extension, the PLC reads the variable switching value of the first displacement sensor 19 and cancels the cylinder extension function, and at this time, one scribing operation is completed. The operation is repeated in this way, and the batch parallel automatic positioning scribing of the workpieces 6 can be realized.
Claims (5)
1. The parallel automatic scribing device for the extension bars comprises a workbench (1) and is characterized in that a plurality of sliding rails (3) which can move on the workbench (1) and are parallel to each other are arranged on the workbench (1) at intervals, and a clamping mechanism (4) for fixing a workpiece (6) is arranged on the sliding rails (3); the center of the workbench (1) is provided with a scribing mechanism, the scribing mechanism comprises cutter holders (8) which are perpendicular to the sliding rail (3) and are positioned above the sliding rail (3), the cutter holders (8) are provided with blade claws (7) the same in number as the sliding rail (3), and the blade claws (7) can move along the axial direction perpendicular to or parallel to the sliding rail (3);
a pair of mounting tables are arranged on the workbench (1), mounting holes are formed in the mounting tables, a screw rod (11) penetrates through the mounting holes, and one end of the screw rod (11) is connected with a servo motor (2) arranged on the workbench (1) through an elastic coupling (14) and a contact bearing (16); a sliding block is assembled on the lead screw (11) between the pair of mounting tables, a first hydraulic oil cylinder (18) is arranged on the sliding block, the tool rest (8) is arranged on an output shaft of the first hydraulic oil cylinder (18), and the tool rest (8) is perpendicular to the sliding rail (3);
the clamping mechanism (4) comprises a first clamping frame (13) and a second clamping frame (12), wherein the first clamping frame (13) is fixed at one end of the sliding rail (3), and a positioning plate (5) is arranged on the first clamping frame (13); the second clamping frame (12) can move along the axial direction of the sliding rail (3);
the end part of the workbench (1) is provided with a second hydraulic oil cylinder (23), and an output shaft of the second hydraulic oil cylinder (23) is provided with a pushing plate (24) capable of moving up and down; a clamping tube (29) is vertically arranged on an output shaft of the second hydraulic oil cylinder (23), a strip-shaped groove is formed in the side surface of the clamping tube (29) along the axial direction, a sliding shaft (33) is arranged in the clamping tube (29), and the sliding shaft (33) is connected with the pushing plate (24) through a connecting plate (32) penetrating through the strip-shaped groove; an electric telescopic rod (30) is arranged at the bottom of the clamping tube (29), and the axial direction of the electric telescopic rod (30) is parallel to the axial direction of the clamping tube (29); the output shaft of the electric telescopic rod (30) is connected with the pushing plate (24) through a connecting rod (31);
when the positions of all the sliding rails (3) on the workbench (1) are required to be adjusted, the position of the pushing plate (24) is lowered by extending the electric telescopic rod (30), then the pushing plate (24) is pushed by the second hydraulic oil cylinder (23), the pushing plate (24) is gradually contacted with the end parts of the sliding rails (3), and the sliding rails (3) are pushed to a proper position for fixing; when the position of the second clamping frame (12) needs to be adjusted, the electric telescopic rod (30) is contracted, so that the position of the pushing plate (24) is raised, and then the second clamping frame (12) is pushed to adjust the distance between the pushing plate and the first clamping frame (13).
2. Extension bar parallel type automatic scribing device according to claim 1, characterized in that a pressure sensor is arranged between the blade jaw (7) and the tool holder (8).
3. The extension bar parallel type automatic scribing device according to claim 1, wherein a position sensor (9) and an encoder (10) are arranged at the tail end of the lead screw (11).
4. The extension bar parallel type automatic scribing device according to claim 1, wherein the blade claw (7) is formed by connecting two arc-shaped blades from the middle part, and the blade claw (7) is in a crisscross arc-shaped structure.
5. The extension bar parallel type automatic scribing device according to claim 4, wherein the first clamping frame (13) comprises symmetrically arranged clamping blocks (21), an arc-shaped clamping surface (26) is processed from the top surface of the clamping blocks (21) to the side surface direction of the clamping blocks (21), and a plurality of clamping grooves (27) with the same interval are formed in the bottom of the clamping blocks (21); the locating plate (5) is located on one side of the clamping surface (26), and a plurality of clamping blocks (28) matched with the clamping grooves (27) are paved on the sliding rail (3) at equal intervals along the axial direction of the sliding rail (3).
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| CN201711138059.7A CN108015740B (en) | 2017-11-16 | 2017-11-16 | Extension bar parallel type automatic scribing device |
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| CN201711138059.7A CN108015740B (en) | 2017-11-16 | 2017-11-16 | Extension bar parallel type automatic scribing device |
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| CN108015740A CN108015740A (en) | 2018-05-11 |
| CN108015740B true CN108015740B (en) | 2024-04-05 |
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| CN111243556B (en) * | 2020-01-13 | 2023-09-26 | 台州伟兴科技有限公司 | Batch linkage scribing device for flutes |
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