CN113102665B - Automatic bar rolling straight thread machine tool - Google Patents
Automatic bar rolling straight thread machine tool Download PDFInfo
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- CN113102665B CN113102665B CN202110541155.6A CN202110541155A CN113102665B CN 113102665 B CN113102665 B CN 113102665B CN 202110541155 A CN202110541155 A CN 202110541155A CN 113102665 B CN113102665 B CN 113102665B
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- machine head
- steel bar
- sliding
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- 238000005096 rolling process Methods 0.000 title claims abstract description 90
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 62
- 239000010959 steel Substances 0.000 claims abstract description 62
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 239000003921 oil Substances 0.000 claims description 28
- 238000003860 storage Methods 0.000 claims description 17
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 14
- 241000719178 Carangoides ruber Species 0.000 claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 6
- 239000010720 hydraulic oil Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
- B21H3/04—Making by means of profiled-rolls or die rolls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H9/00—Feeding arrangements for rolling machines or apparatus manufacturing articles dealt with in this subclass
- B21H9/02—Feeding arrangements for rolling machines or apparatus manufacturing articles dealt with in this subclass for screw-rolling machines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses an automatic steel bar rolling straight thread machine tool, which comprises a frame and a working table plate fixedly arranged at the top of the frame; the workbench plate is sequentially provided with the following components from front to back: the clamping mechanism is used for clamping the steel bar to be rolled, the positioning mechanism is used for realizing the alignment of the center of the steel bar to be rolled and the center of the thread rolling machine head, and the feeding mechanism is used for pushing the thread rolling machine head to advance towards the end part of the steel bar and roll threads. The automatic steel bar rolling straight thread machine tool has high holding force and can realize the automatic positioning center of the steel bars.
Description
Technical Field
The invention belongs to the technical field of manufacturing of steel bar connection machinery, and particularly relates to an automatic steel bar rolling straight thread machine tool.
Background
In the construction industry, as the requirements of customers on quality are higher and higher, the diameters of required steel bars are larger and larger, and with the increase of labor cost, automatic steel bar rolling straight thread machine tools are becoming a trend to replace labor. However, as the application range of the automatic bar rolling straight thread machine tool is wider and wider, the thread rolling machine on the market cannot meet the demands of customers. The reasons for this are the following: (1) The existing automatic bar rolling straight thread machine tool is pneumatic clamping, the clamping force is small, the automatic bar rolling straight thread machine tool is only suitable for small-diameter bars, and the phenomenon of bar rotation obviously occurs when the bars above 32 are processed; (2) The vices of the existing thread rolling machine are usually held in two directions, and in the holding process, if the vices are held in the direction of the transverse ribs, the steel bars are easy to rotate in the thread rolling process; (3) The vice of the existing thread rolling machine can not position the center by itself, and in the reinforcing steel bar clamping process, the reinforcing steel bar needs to be manually adjusted to the center of the vice, so that the labor is wasted, and when the vice clamps the reinforcing steel bar, the center of the reinforcing steel bar and the center of the thread rolling machine head can not be ensured to be coaxial.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing an automatic steel bar rolling straight thread machine tool with large holding force and an automatic steel bar positioning center.
In order to solve the technical problems, the invention adopts the following technical scheme:
An automatic bar rolling straight thread machine tool comprises a frame and a working table plate fixedly arranged at the top of the frame; the workbench plate is sequentially provided with the following components from front to back: the clamping mechanism is used for clamping the steel bar to be rolled, the positioning mechanism is used for realizing the alignment of the center of the steel bar to be rolled and the center of the thread rolling machine head, and the feeding mechanism is used for pushing the thread rolling machine head to advance towards the end part of the steel bar and roll threads.
Further, the clamping mechanism comprises a vice bracket, a vice backing plate and a vice body which are sequentially and fixedly arranged on the working table plate from bottom to top; the center of the vice body is provided with a steel bar jack, four square holes which are connected with the steel bar jack into a whole are uniformly formed in the periphery of the steel bar jack, each of the four square holes is provided with a jaw, two jaws close to a vice backing plate are respectively fixedly arranged in the square hole where the jaw is positioned, and the other two jaws are respectively arranged in the square hole where the jaw is positioned in a sliding manner; the vice body is fixedly provided with two hydraulic cylinders, and piston rods of the two hydraulic cylinders are respectively connected with two jaws which are arranged in a sliding manner; the two jaws which are arranged in a sliding way respectively move towards the center of the reinforcing steel bar jack so as to clamp reinforcing steel bars placed on the other two jaws which are arranged fixedly.
Further, a lower jaw seat is fixedly arranged outside two square holes where two jaws close to the vice base plate are located, and the two jaws are fixedly arranged in the lower jaw seat; an upper jaw seat is respectively and slidably arranged in two square holes where the other two jaws are located, the two jaws are respectively and fixedly arranged in the two upper jaw seats, and each upper jaw seat is respectively and fixedly connected with a piston rod of a hydraulic cylinder.
Further, a steel bar bracket for supporting and guiding the steel bars extending to the clamping mechanism from front to back is arranged on the working table plate and positioned at the front side of the clamping mechanism; the steel bar support comprises a support plate fixedly arranged at the front part of the working table plate, a tubular roller seat vertically and fixedly arranged on the support plate, a sliding block, a pressure spring, a sliding column, a roller support fixedly arranged at the top of the sliding column and a V-shaped roller rotatably arranged on the roller support, wherein the sliding block, the pressure spring and the sliding column are sequentially inserted into the roller seat from bottom to top.
Further, a strip-shaped limit hole is vertically formed in the outer wall of the roller seat, a limit column is fixedly arranged on the sliding column along the radial direction of the sliding column, and the outer end of the limit column is inserted into the limit hole in a sliding manner.
Further, through holes are formed in the supporting plate and located right below the roller seat, nuts are fixedly arranged below the through holes, and height adjusting bolts are arranged in the nuts and the through holes.
Further, the positioning mechanism comprises two baffle plates fixedly arranged on the workbench plate along the direction vertical to the reinforcing steel bars, a pair of opposite plates fixedly arranged on the top of one baffle plate seat, a baffle plate hinged between the pair of opposite plates through a pin roll and capable of turning over to the other baffle plate seat and horizontally keeping the baffle plate seat, and a push plate capable of moving and lifting the baffle plate in a horizontal state along the front-back direction; the push plate is arranged on one side close to the pin shaft, and the upper part of the front end of the push plate is provided with an inclined plane which is used for sliding contact with the bottom surface of the baffle plate; the front side of the baffle, which faces the clamping mechanism, is provided with a positioning screw, and when the baffle is in a horizontal state, the center of the positioning screw and the center of the thread rolling machine head are positioned on the same straight line.
Further, a front-back transparent groove is formed in the top of the baffle seat provided with the pin shaft and positioned at the inner side of the pin shaft, an optical axis is arranged in the groove along the left-right direction, a cam is arranged on the optical axis through a bearing, and a push plate jack which is transparent in front-back and exposes the bearing is formed in the middle of the lower half part of the cam; when the push plate moves forwards, the front end of the push plate is inserted into the push plate jack, and the cam is rotated so as to lift the baffle plate.
Further, the feeding mechanism comprises two bar supports fixedly arranged on the working table plate along the front-back direction, a pair of sliding bars fixedly arranged on the two bar supports, a sliding table slidingly arranged on the sliding bars, a thread rolling motor and a speed reducer fixedly arranged on the sliding table, a thread rolling machine head fixedly arranged on an output shaft of the speed reducer and a machine head feeding cylinder fixedly arranged at the rear part of the working table plate and used for pushing and pulling the sliding table to move along the sliding bars; the back fixedly connected with extension board of push pedal to the extension board is fixed to be set up on the slip table.
Further, the frame is also provided with an air source and an oil storage tank for storing hydraulic oil; the tail part of the machine head feeding cylinder is provided with an oil inlet, and the head part of the machine head feeding cylinder is provided with an air inlet; the air source is connected with an air inlet of the oil storage tank through an air pipe with an electromagnetic valve, and an oil outlet of the oil storage tank is connected with an oil inlet of a machine head feeding cylinder through a pipeline, so that the advancing of the thread rolling machine head is realized in a hydraulic mode; the air source is connected with an air inlet of the machine head feeding cylinder through an air pipe with an electromagnetic valve on the other hand, and the thread rolling machine head is retreated in an air pressure mode.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in:
(1) The vice adopts double-cylinder hydraulic cross clamping, so that the clamping force is high, the clamping is firm, and the rotation of the steel bars can be effectively prevented; (2) The jaw of the vice can enable the steel bars with different specifications to be coaxial with the thread rolling machine head through the adjusting gasket, so that the stability of thread rolling is ensured; (3) The vice is clamped by a cross, so that the center of the steel bar can be automatically coaxial with the thread rolling machine head, and the quality of the machining thread head is improved; (4) The steel bar bracket can enable the steel bars to automatically separate from the jaw of the vice after finishing thread rolling, the inside is provided with a pressure spring which can jack up the steel bars, and the lower part is provided with a height adjusting screw which can adjust the height of the steel bar bracket; (5) The positioning mechanism of the steel bar adopts full mechanical positioning, does not have pneumatic components such as an air cylinder and the like, has simple structure and is stable and reliable in positioning; (6) The machine head feeding cylinder adopts a pneumatic and hydraulic combined mode, so that the feeding of the thread rolling machine head is stable.
Drawings
Fig. 1 is a front view of an automatic bar rolling straight thread machine tool of the present invention;
fig. 2 is a side view of an automatic bar rolling straight thread machine tool of the present invention;
FIG. 3 is a schematic view of the clamping mechanism of the present invention;
Fig. 4 is a schematic structural view of the reinforcing bar stand of the present invention;
Fig. 5 is a cross-sectional view of the reinforcing bar stand of the present invention;
FIG. 6 is a schematic view of the positioning mechanism of the present invention;
FIG. 7 is a partial cross-sectional view of the positioning mechanism of the present invention;
FIG. 8 is a workflow diagram of the present invention;
In the figure: 1. the screw rolling motor, 2, a machine head feeding cylinder, 3, a sliding table, 4, an oil storage tank, 5, a sliding bar, 6, a vice bracket, 7, a steel bar bracket, 7-1, a roller seat, 7-2, a limiting hole, 7-3, a limiting column, 7-4, a sliding column, 7-5, a roller bracket, 7-6, a V-shaped roller, 7-7, a pressure spring, 7-7, a height adjusting bolt, 7-9, a sliding block, 7-10, a nut, 7-11 and a supporting plate; 8. the clamping mechanism comprises 8-1 parts of clamping mechanism, 8-2 parts of vice backing plate, 8-3 parts of vice body, 8-4 parts of reinforcing steel bar jack, 8-5 parts of jaw, 8-6 parts of hydraulic cylinder, lower jaw seat, 8-7 parts of upper jaw seat, 8-8 parts of cylinder mounting plate; 9. 9-1 parts of positioning mechanism, 9-2 parts of push plate, 9-3 parts of baffle seat, 9-4 parts of support plate, 9-5 parts of baffle, bearing, 9-6 parts of cam; 10. the machine comprises a thread rolling machine head, 11, a frame, 12, a water tank, 13, a control box, 14, a speed reducer, 15 and a working table plate.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
As shown in fig. 1 and 2, the present invention provides an automatic bar rolling straight thread machine tool, comprising a frame 11 and a table 15 fixedly arranged on the top of the frame 11; the table 15 is provided with: a reinforcing bar support 7 for supporting and guiding reinforcing bars extending from front to back to the clamping mechanism 8, the clamping mechanism 8 for clamping the reinforcing bars to be rolled, a positioning mechanism 9 for aligning the center of the reinforcing bars to be rolled with the center of the thread rolling machine head 10, and a feeding mechanism for pushing the thread rolling machine head 10 to travel towards the end of the reinforcing bars and roll threads.
As shown in fig. 3, the clamping mechanism 8 comprises a vice stand 6, a vice backing plate 8-1 and a vice body 8-2 which are fixedly arranged on a working table 15 from bottom to top in sequence; the center of the vice body 8-2 is provided with a steel bar jack 8-3, four square holes which are distributed in a cross shape and are connected with the steel bar jack 8-3 into a whole are uniformly formed around the steel bar jack 8-3, one jaw 8-4 is respectively arranged in the four square holes, two jaws 8-4 which are close to the vice backing plate 8-1 are respectively fixedly arranged in the square holes where the jaw 8-4 is positioned, and the other two jaws 8-4 are respectively slidably arranged in the square holes where the jaw 8-4 is positioned; the vice body 8-2 is fixedly provided with two hydraulic cylinders 8-5. The hydraulic cylinder 8-5 is first fixedly mounted on the cylinder mounting plate 8-8, and then the cylinder mounting plate 8-8 is fixedly mounted on the vice body 8-2. The piston rods of the two hydraulic cylinders 8-5 are respectively connected with two jaws 8-4 which are arranged in a sliding way; the two jaws 8-4 which are slidably disposed are moved toward the center of the reinforcing bar insertion hole 8-3, respectively, so as to clamp the reinforcing bars placed on the other two jaws 8-4 which are fixedly disposed.
A lower jaw seat 8-6 is fixedly arranged outside two square holes where two jaws 8-4 close to the vice backing plate 8-1 are positioned, and the two jaws 8-4 are fixedly arranged in the lower jaw seat 8-6; an upper jaw seat 8-7 is respectively and slidably arranged in two square holes where the other two jaws 8-4 are located, the two jaws 8-4 are respectively and fixedly arranged in the two upper jaw seats 8-7, and each upper jaw seat 8-7 is respectively and fixedly connected with a piston rod of one hydraulic cylinder 8-5.
The vice adopts double-cylinder hydraulic cross clamping, so that the clamping force on the steel bars is high and the clamping is firm, and the steel bars can be effectively prevented from rotating; the vice adopts cross clamping, so that the center of the steel bar can be automatically coaxial with the thread rolling machine head, and the quality of the machining thread head is improved. Under the action of the piston of the hydraulic cylinder 8-5, the upper jaw seat 8-7 drives the jaw 8-4 to move in the square hole, so as to achieve the purpose of clamping the reinforcing steel bars. The purpose of arranging the upper jaw seat 8-7 and the lower jaw seat 8-6 is to easily change jaws when the specification of the steel bar to be rolled is changed, so that the center of the steel bar is kept unchanged, and the rolling is more stable.
As shown in fig. 4 and 5, the reinforcement bracket 7 includes a support plate 7-11 fixedly disposed at the front of the work platen 15, a roller seat 7-1 vertically fixedly disposed on the support plate 7-11 and having a tubular shape, a slider 7-9, a compression spring 7-7 and a slide post 7-4 movably inserted into the roller seat 7-1 from bottom to top in sequence, the top end of the slide post 7-4 is located at the outside of the roller seat 7-1, and the top of the slide post 7-4 is fixedly provided with a roller bracket 7-5, and a V-shaped roller 7-6 is rotatably disposed on the roller bracket 7-5. A strip-shaped limit hole 7-2 is vertically formed in the outer wall of the roller seat 7-1, a limit column 7-3 is fixedly arranged on the sliding column 7-4 along the radial direction of the sliding column, and the outer end of the limit column 7-3 is slidably inserted into the limit hole 7-2. Through holes are formed in the supporting plate 7-11 and located right below the roller seat 7-1, nuts 7-10 are fixedly arranged below the through holes, and height adjusting bolts 7-8 are arranged in the nuts 7-10 and the through holes.
When the steel bar is fed into the machine tool from front to back, the pressure spring 7-7 plays a role in jacking the steel bar, and the steel bar is prevented from being collided with the two jaws 8-4 fixedly arranged on the lower side of the vice. Then when the vice clamps the steel bar, the steel bar descends and contacts with the two jaws 8-4 at the lower side, and the pressure spring 7-7 is compressed along with the descending of the steel bar; the vice is released after the thread rolling, the compression spring 7-7 is extended upwards, the steel bar is lifted to be separated from the jaw 8-4 at the lower side, and then the steel bar is sent out. The height of the V-roller 7-6 is adjustable by a height adjusting bolt 7-10.
As shown in fig. 6, the positioning mechanism 9 includes two baffle holders 9-2 fixedly provided on the work table 15 in a direction perpendicular to the reinforcing bars, a pair of plates 9-7 fixedly provided on the top of one of the baffle holders 9-2, a baffle 9-4 hinged between the pair of plates 9-7 by a pin and capable of being turned over toward the other baffle holder 9-2 and being held horizontally on the baffle holder 9-2, and a push plate 9-1 movable in the front-rear direction toward and lifting the baffle 9-4 in a horizontal state, a stopper pin for supporting the free end of the horizontal baffle 9-4 being fixedly provided on the side surface of the other baffle holder 9-2; the push plate 9-1 is arranged at one side close to the pin shaft, the upper part of the front end of the push plate is provided with an inclined plane which is used for sliding contact with the bottom surface of the baffle plate 9-4, the lowest position of the front end of the inclined plane is slightly lower than the bottom surface of the baffle plate 9-4 in a horizontal state, and the free end of the baffle plate 9-4 is lifted by the inclined plane when the push plate 9-1 moves forwards, so that the thread rolling machine head 10 can roll threads on the steel bars; the front side of the barrier 9-4 facing the clamping mechanism 8 is provided with a set screw, and when the barrier 9-4 is in a horizontal state, the set screw center and the center of the thread roller head 10 are on the same line.
The positioning mechanism 9 has the functions of: on one hand, the steel bars are prevented from colliding with the thread rolling machine head when being conveyed from the feeding mechanism of the material arranging line, on the other hand, the function of positioning the end part of the steel bars is played, the end part of the conveyed steel bars is propped against the positioning mechanism 9 to stop, and when the thread rolling machine head advances to roll threads, the thread rolling is started from the position, so that the accurate thread rolling length is convenient. The positioning mechanism 9 adopts full mechanical positioning, does not have pneumatic components such as an air cylinder and the like, has simple structure, stable and reliable positioning, avoids errors caused by electrical reasons and the like, and has lower cost.
As shown in fig. 7, further, a front-rear transparent groove is formed in the top of the baffle seat 9-2 provided with the pin shaft and located at the inner side of the pin shaft, an optical axis is arranged in the groove along the left-right direction, a cam 9-6 is mounted on the optical axis through a bearing 9-5, and a push plate jack 9-8 which is transparent in front-rear and exposes the bearing 9-5 is formed in the middle of the lower half part of the cam 9-6; the front end of the push plate 9-1 is inserted into the push plate insertion hole 9-8 when it moves forward, and the cam 9-6 is rotated to lift the shutter 9-4. The positioning mechanism 9 can effectively avoid the abrasion of the baffle plate 9-4 by additionally installing the bearing 9-5 and the cam 9-6.
As shown in fig. 2, the feeding mechanism includes two bar holders fixedly provided on the table plate 15 in the front-rear direction, a pair of slide bars 5 fixedly provided on the two bar holders, a slide table 3 slidably provided on the slide bars 5, a thread rolling motor 1 and a speed reducer 14 fixedly provided on the slide table 3, a thread rolling die 10 fixedly mounted on an output shaft of the speed reducer 14, and a die feeding cylinder 2 fixedly provided at a rear portion of the table plate 15 and for pushing and pulling the slide table 3 to move along the slide bars 5; the back part of the push plate 9-1 is fixedly connected with a support plate 9-3, and the support plate 9-3 is fixedly arranged on the sliding table 3.
The push plate 9-1 can move back and forth under the drive of the sliding table 3. When thread rolling starts, the thread rolling machine head 10 is driven by the sliding table 3 to advance, and meanwhile the push plate 9-1 moves forwards so as to lift the baffle plate 9-4; when the thread rolling is completed, the thread rolling machine head 10 is retreated, the push plate 9-1 is also moved backwards, and the baffle plate 9-4 is lowered back to the original position. The baffle 9-4 is positioned in a horizontal state in situ to position the steel bars.
The frame 11 is also provided with an air source and an oil storage tank 4 for storing hydraulic oil; the tail part of the machine head feeding cylinder 2 is provided with an oil inlet, and the head part of the machine head feeding cylinder is provided with an air inlet; the air source is connected with the air inlet of the oil storage tank 4 through an air pipe with an electromagnetic valve, and the oil outlet of the oil storage tank 4 is connected with the oil inlet of the machine head feeding cylinder 2 through a pipeline, so that the advancing of the thread rolling machine head 10 is realized in a hydraulic mode; the air source is connected with the air inlet of the machine head feeding cylinder 2 through an air pipe with an electromagnetic valve, and the back-out of the thread rolling machine head 10 is realized in an air pressure mode. An air source processor for oil-gas separation is arranged on an air pipe connected with an air inlet of the machine head feeding air cylinder 2, and an oil outlet of the air source processor is connected with an oil storage tank 4 through an oil guide pipe.
The head feeding cylinder 2 is used for realizing feeding of the thread rolling head 10, and the feeding requirement of the thread rolling head 10 is relatively stable, and in actual work, it is found that a clamping phenomenon often occurs when a common cylinder adopting a pure pneumatic mode is used for realizing feeding. In order to effectively solve the problem, the machine head feeding cylinder 2 adopts a pneumatic and hydraulic combined mode, so that the feeding of the thread rolling machine head 10 is smoother, and the phenomenon of clamping is avoided. As shown in fig. 8, when the thread rolling die head 10 is required to advance, gas in the gas source flows into the oil storage tank 4 from the upper gas inlet of the oil storage tank 4 through the electromagnetic valve, so that the pressure in the oil storage tank 4 is increased due to the entering of the gas, hydraulic oil in the oil storage tank 4 is discharged from the lower surface of the oil storage tank 4, flows into the tail part of the die head feeding cylinder 2 through the pipeline, and the cylinder rod is ejected out, so that the advancing of the thread rolling die head 10 is realized; when the thread rolling machine head 10 is to be retreated, gas in a gas source flows into the head of the machine head feeding cylinder 2 through the electromagnetic valve, so that the cylinder rod is retracted, hydraulic oil in the machine head feeding cylinder 2 flows back into the oil storage tank 4, and the retreating of the thread rolling machine head 10 is realized.
The frame 11 is also provided with a water tank 12 and a cooling pump connected with the water tank 12. The working platen 15 is also provided with a control box 13 for controlling the operation of all the execution elements such as the thread rolling machine head 10, the hydraulic cylinder 8-5 of the clamping mechanism 8, the machine head feeding cylinder 2 of the feeding mechanism, the thread rolling motor 1 and the like, and the control box 13 is provided with: the machine head forward/backward switch of the forward/backward rotation of the thread rolling motor 1 is controlled, the machine head forward/backward switch of the machine head feeding cylinder 2 for the forward/backward movement of the thread rolling machine head 10 is controlled, the vice clamping/opening switch of the vice clamping and loosening is controlled, the hydraulic station/water pump switch, the automatic switch, the standby switch and the emergency stop switch are controlled.
The application process of the invention is as follows:
(1) Connecting with air source, and normal air pressure is 0.6-0.8MPa.
(2) It is checked whether the rotation buttons on the control box 13 are all in the neutral position. A main power switch (comprising a hydraulic station power supply) of the distribution box is closed, and an emergency stop switch is closed. Checking whether each button is normal; turning the nose positive/negative switch to see if the turning direction of the thread rolling nose 10 is consistent with the switch direction (positive thread right-hand, negative thread left-hand); rotating a machine head forward/backward switch to check whether the speed reducer is fed at a constant speed and the feeding direction is consistent with the switching direction; rotating a vice clamping/opening switch to check whether the clamping/opening direction of the vice is consistent with the opening direction; the thread rolling motor 1 and the cooling pump are operated in a working state; checking the rotation direction of the cooling pump, wherein the cooling liquid is sufficient to supply and the return water is smooth; check if the scram button can be used normally.
(3) And (3) test run: placing the steel bar on a vice, and enabling the end part of the steel bar to prop against a positioning screw on the baffle plate 9-4; the "hydraulic station/pump" button is pressed and the hydraulic station and pump are started.
(4) Pressing the button "auto" button, the thread rolling die 10 starts to rotate and advances; the shutter 9-4 is raised.
(5) The thread rolling die 10 continues to advance and thread rolling is performed.
(6) After finishing the thread rolling, the thread rolling machine head 10 is reversed and retreated.
(7) The thread rolling machine head 10 is retreated to the proper position, the thread rolling machine head 10 stops rotating, the reinforcing steel bars are taken out, and the thread rolling is finished.
Claims (8)
1. An automatic bar rolling straight thread machine tool comprises a frame (11), a working table plate (15) fixedly arranged at the top of the frame (11) and a thread rolling machine head (10) arranged above the working table plate (15) along the front-back direction; the method is characterized in that: the workbench plate (15) is sequentially provided with: the clamping mechanism (8) is used for clamping the steel bar to be rolled, the positioning mechanism (9) is used for realizing the alignment of the center of the steel bar and the center of the thread rolling machine head (10), and the feeding mechanism is used for pushing the thread rolling machine head (10) to advance towards the end of the steel bar and roll threads; the positioning mechanism (9) comprises two baffle seats (9-2) fixedly arranged on the workbench plate (15) along the direction perpendicular to the steel bars, a pair of opposite plates (9-7) fixedly arranged on the top of one baffle seat (9-2), a baffle (9-4) hinged between the pair of opposite plates (9-7) through a pin roll and capable of turning over to the other baffle seat (9-2) and horizontally keeping on the baffle seat (9-2), and a push plate (9-1) capable of moving to the baffle (9-4) in a horizontal state along the front and back directions and lifting the baffle; the push plate (9-1) is arranged on one side close to the pin shaft, and the upper part of the front end of the push plate is provided with an inclined plane which is used for sliding contact with the bottom surface of the baffle plate (9-4); the front side of the baffle plate (9-4) facing the clamping mechanism (8) is provided with a positioning screw, and when the baffle plate (9-4) is in a horizontal state, the center of the positioning screw and the center of the thread rolling machine head (10) are positioned on the same straight line; the baffle seat (9-2) provided with the pin shaft is provided with a front-back transparent groove at the top and at the inner side of the pin shaft, an optical axis is arranged in the groove along the left-right direction, a cam (9-6) is arranged on the optical axis through a bearing (9-5), and a push plate jack (9-8) which is transparent front and back and exposes the bearing (9-5) is arranged in the middle of the lower half part of the cam (9-6); when the push plate (9-1) moves forwards, the front end of the push plate is inserted into the push plate insertion hole (9-8), and the cam (9-6) is rotated so as to lift the baffle plate (9-4).
2. The automatic bar rolling straight thread machine of claim 1 wherein: the clamping mechanism (8) comprises a vice bracket (6), a vice backing plate (8-1) and a vice body (8-2) which are sequentially and fixedly arranged on the workbench plate (15) from bottom to top; the center of the vice body (8-2) is provided with a steel bar jack (8-3), four square holes which are connected with the steel bar jack (8-3) into a whole are uniformly formed in the periphery of the steel bar jack, one jaw (8-4) is arranged in each of the four square holes, two jaws (8-4) which are close to a vice backing plate (8-1) are respectively fixedly arranged in the square hole where the jaw is located, and the other two jaws (8-4) are respectively arranged in the square hole where the jaw is located in a sliding manner; the vice body (8-2) is fixedly provided with two hydraulic cylinders (8-5), and piston rods of the two hydraulic cylinders (8-5) are respectively connected with two jaws (8-4) which are arranged in a sliding manner; the two jaws (8-4) which are arranged in a sliding way respectively move towards the center of the reinforcing steel bar jack (8-3) so as to clamp reinforcing steel bars placed on the other two jaws (8-4) which are arranged in a fixed way.
3. The automatic bar rolling straight thread machine of claim 2 wherein: a lower jaw seat (8-6) is fixedly arranged outside two square holes where two jaws (8-4) close to the vice backing plate (8-1) are positioned, and the two jaws (8-4) are fixedly arranged in the lower jaw seat (8-6); an upper jaw seat (8-7) is respectively and slidably arranged in two square holes where the other two jaws (8-4) are located, the two jaws (8-4) are respectively and fixedly arranged in the two upper jaw seats (8-7), and each upper jaw seat (8-7) is respectively and fixedly connected with a piston rod of one hydraulic cylinder (8-5).
4. The automatic bar rolling straight thread machine of claim 1 wherein: a reinforcing steel bar bracket (7) which is used for supporting and guiding the reinforcing steel bar bracket to extend to the clamping mechanism (8) from front to back is arranged on the working table plate (15) and positioned at the front side of the clamping mechanism (8); the steel bar support (7) comprises a support plate (7-11) fixedly arranged at the front part of a working table plate (15), a tubular roller seat (7-1) vertically and fixedly arranged on the support plate (7-11), a sliding block (7-9), a pressure spring (7-7) and a sliding column (7-4) which are sequentially inserted into the roller seat (7-1) from bottom to top, a roller support (7-5) fixedly arranged at the top of the sliding column (7-4) and a V-shaped roller (7-6) rotatably arranged on the roller support (7-5).
5. The automatic bar-rolling straight thread machine tool according to claim 4, wherein: the outer wall of the roller seat (7-1) is vertically provided with a strip-shaped limiting hole (7-2), the sliding column (7-4) is fixedly provided with a limiting column (7-3) along the radial direction of the sliding column, and the outer end of the limiting column (7-3) is inserted into the limiting hole (7-2) in a sliding manner.
6. The automatic bar-rolling straight thread machine tool according to claim 4, wherein: through holes are formed in the supporting plates (7-11) and located right below the roller seat (7-1), nuts (7-10) are fixedly arranged below the through holes, and height adjusting bolts (7-8) are arranged in the nuts (7-10) and the through holes.
7. The automatic bar rolling straight thread machine of claim 1 wherein: the feeding mechanism comprises two bar supports fixedly arranged on a working table plate (15) along the front-back direction, a pair of sliding bars (5) fixedly arranged on the two bar supports, a sliding table (3) slidingly arranged on the sliding bars (5), a thread rolling motor (1) and a speed reducer (14) fixedly arranged on the sliding table (3), a thread rolling machine head (10) fixedly arranged on an output shaft of the speed reducer (14) and a machine head feeding cylinder (2) fixedly arranged at the rear part of the working table plate (15) and used for pushing and pulling the sliding table 3 to move along the sliding bars 5; the back part of the push plate (9-1) is fixedly connected with a support plate (9-3), and the support plate (9-3) is fixedly arranged on the sliding table (3).
8. The automatic bar rolling straight thread machine of claim 7 wherein: an air source and an oil storage tank (4) for storing hydraulic oil are also arranged on the frame (11); the tail part of the machine head feeding cylinder (2) is provided with an oil inlet, and the head part of the machine head feeding cylinder is provided with an air inlet; the air source is connected with an air inlet of the oil storage tank (4) through an air pipe with an electromagnetic valve, and an oil outlet of the oil storage tank (4) is connected with an oil inlet of the machine head feeding cylinder (2) through a pipeline, so that the thread rolling machine head (10) is hydraulically driven to move forward; the air source is connected with an air inlet of the machine head feeding cylinder (2) through an air pipe with an electromagnetic valve on the other hand, and the thread rolling machine head (10) is retreated in an air pressure mode.
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