CN109434473B - Finish machining device for end part of exhaust valve rod - Google Patents
Finish machining device for end part of exhaust valve rod Download PDFInfo
- Publication number
- CN109434473B CN109434473B CN201811625472.0A CN201811625472A CN109434473B CN 109434473 B CN109434473 B CN 109434473B CN 201811625472 A CN201811625472 A CN 201811625472A CN 109434473 B CN109434473 B CN 109434473B
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- connecting rod
- rod
- box body
- rotation
- piece
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/02—Machine tools for performing different machining operations
Abstract
The invention relates to the field of valve machining, in particular to a finish machining device for the end part of an exhaust valve rod, which comprises a box body, wherein a sliding plate is connected to the box body in a sliding manner, a chamfer surface is arranged at the end part of the sliding plate, the top of the box body is connected with a workbench in a sliding manner, a driving mechanism is arranged on the workbench, a slotting cutter is arranged above the workbench, and a chamfer block is arranged on the slotting cutter; the box rotates and is connected with the rotation piece, rotate the first connecting rod of fixedly connected with on the piece, the one end rotation connection that the rotation piece was kept away from to first connecting rod is on the workstation, fixedly connected with second connecting rod on the position that the rotation piece is connected with the rotation of box, the one end rotation that the rotation piece was kept away from to the second connecting rod is connected with the third connecting rod, the third connecting rod rotates and connects on the slide, it is connected with the fourth connecting rod to rotate on the box, the one end rotation connection that the box was kept away from to the fourth connecting rod is. The three steps of processing of the valve rod clamping groove, chamfering processing of the groove edge and processing of the small-end chamfering are all carried out on the same device.
Description
Technical Field
The invention relates to the field of valve machining, in particular to a finish machining device for an end part of an exhaust valve rod.
Background
Exhaust valves, which are one type of valve, are important components in engines and function to control the exhaust of combusted exhaust gases from the engine.
The exhaust valve mainly comprises a valve rod and a valve head, and the valve head and the valve rod are fixedly connected together. The valve head is in the shape of a horn. As shown in FIG. 6, the right end of the valve stem is used to fixedly connect with the valve head, a locking clip groove 28 is provided on the valve stem near the left end, a chamfer is provided on the groove edge 30 of the locking clip groove 28, and a small circumferential chamfer 29 is provided on the left end of the valve stem. In the process of processing the valve rod, a clamping groove 28 needs to be processed on the valve rod, then the groove edge 30 of the clamping groove 28 is chamfered, and finally the end part of the valve rod is processed by a small-end chamfer 29. In the prior art, the three processing steps need to be carried out on three different devices, and after one processing step is finished, the valve rod needs to be transferred to another device, so that the operation is troublesome. In addition, three different devices are needed for processing the valve rod, so the occupied area of the devices is large, and the cost for purchasing the devices by enterprises is high.
Disclosure of Invention
The invention aims to provide a finish machining device for the end part of an exhaust valve rod, which is used for realizing that three steps of machining a valve rod clamping groove, chamfering the edge of the groove and chamfering a small end are all carried out on the same equipment.
In order to achieve the purpose, the technical scheme of the invention is as follows: the finish machining device for the end part of the exhaust valve rod comprises a box body, wherein a sliding plate is vertically and slidably connected to the box body, an inclined chamfer surface is arranged at the end part of the sliding plate, a workbench is transversely and slidably connected to the top of the box body, a driving mechanism for driving the valve rod to rotate is arranged on the workbench, a slotting cutter is arranged above the workbench, chamfer blocks are arranged on two sides of a cutting edge of the slotting cutter, and the slotting cutter and the sliding plate synchronously move; the box rotates and is connected with the rotation piece, rotates and to go up first connecting rod of fixedly connected with and second connecting rod on the piece, and the one end rotation connection of keeping away from the rotation piece of first connecting rod is on the workstation, and the one end rotation connection of keeping away from the rotation piece of second connecting rod is connected with the third connecting rod, and the third connecting rod rotates and connects on the slide, rotates on the box and is connected with the fourth connecting rod, and the one end rotation connection of keeping away from the box of fourth connecting rod is on the workstation.
The working principle of the scheme is as follows: the driving mechanism is used for driving the valve rod to rotate. The slotting tool is used for processing the locking and clamping groove on the valve rod, and the chamfering block on the slotting tool is used for chamfering the groove edge of the locking and clamping groove. The chamfer surface at the end part of the sliding plate is used for carrying out small-end chamfer processing on the valve rod. The fourth connecting rod is used for supporting the workbench, so that the workbench is stably and transversely connected to the top of the box body in a sliding mode. When the rotating piece rotates, the first connecting rod is fixedly connected to the rotating piece, so that the rotating piece drives the first connecting rod to swing, and the first connecting rod pushes the workbench to transversely slide; meanwhile, the second connecting rod is fixedly connected to the rotating piece, so that the rotating piece drives the second connecting rod to swing together, and the second connecting rod drives the sliding plate to vertically slide through the third connecting rod.
Through this scheme, when the slide down-shifting, the workstation drives the valve stem and removes the below of slotting tool, because slotting tool and slide synchronous motion, so the slotting tool also moves down, and the slotting tool is close to the valve stem, has realized automatic feed, and the valve stem rotates for the slotting tool, and the slotting tool processes the valve stem to form the collet groove. As the slotter knife continues to move downward, the chamfer block on the knife edge of the slotter knife just abuts against the slot edge, thereby chamfering the slot edge. When the sliding plate moves upwards, the slotting cutter moves upwards, and the slotting cutter leaves the valve rod, so that cutter withdrawing is realized. Meanwhile, the workbench drives the end part of the valve rod to move to the side part of the box body, the chamfer surface at the end part of the sliding plate is exposed out of the top of the box body, the end part of the valve rod is attached to the chamfer surface at the end part of the sliding plate, and the chamfer surface is circumferentially polished on the end part of the valve rod along with the rotation of the valve rod, so that the step of small-head chamfering treatment is completed.
When adopting above-mentioned technical scheme, have following beneficial effect:
1. the three steps of processing the locking clamp groove of the valve rod, processing the chamfer at the edge of the groove and the small-end chamfer can be carried out on the same equipment without being carried out on different equipment, and the processing process does not need to transfer workpieces and is simple and convenient to operate. Moreover, by the scheme, the using quantity of the equipment is reduced, the occupied area is reduced, and the purchase cost of the equipment is reduced for enterprises.
2. The valve rod can be moved, the slotting tool can be advanced and retracted, and the sliding plate can be moved vertically by rotating the rotating piece, so that the operation is simple and convenient. When the clamping groove needs to be machined, the machining table drives the valve rod to move to the position below the slotting cutter, the slotting cutter moves downwards, and the chamfer surface of the sliding plate is far away from the valve rod; when the small-end chamfer processing of the valve rod needs to be carried out, the processing table drives the valve rod to be far away from the slotting tool, the sliding plate moves upwards, and the slotting tool is far away from the valve rod, so that the movement of the processing table, the movement of the sliding plate and the movement of the slotting tool are matched ingeniously.
Furthermore, the driving mechanism comprises a driving chain wheel and a plurality of rotatable driven chain wheels, triangular chucks are arranged at the end parts of the driven chain wheels, chains are connected between the driven chain wheels and the driving chain wheels, and the driving chain wheels are connected with motors. The triangle chuck is used for fixing the valve rod. Therefore, the motor drives the driving chain wheel to rotate, and the driving chain wheel drives the driven chain wheel to rotate through the chain, so that the valve rod is driven to rotate. Because driven sprocket has a plurality ofly, so can fix a plurality of valve stems to realize a plurality of valve stems and carry out the processing, improved the machining efficiency of valve stem.
Further, it is fan-shaped to rotate the piece, and the bottom of box is equipped with main gasbag, rotates the piece and rotates the position of connecting at the box and rotate with first connecting rod and be connected, is equipped with the card hole on the first connecting rod, rotates to be equipped with smooth chamber on the piece, and sliding connection has the bolt in the smooth chamber, is connected with on the bolt and makes the bolt insert the spring in the card hole, is equipped with in the smooth chamber to be used for making the bolt follow the gasbag of taking out in the card hole, main gasbag and follow the gasbag intercommunication. Because the rotating piece is fan-shaped, compare the tip and be circular rotating piece to realize rotating the piece and in the rotation process, the piece that rotates can offset with main gasbag intermittently. When rotating the piece and removing to being close to main gasbag direction, the bolt inserted the card hole this moment, rotated piece and first connecting rod fixed connection together, rotated the piece and rotated with first connecting rod together, rotated the piece and driven the workstation through first connecting rod and to being close to box middle part direction lateral shifting, simultaneously, rotated the piece and driven the slide through second connecting rod and third connecting rod and move down, and the slotting tool also moves down and is close to the valve stem. When rotating the piece and offsetting with main gasbag, it extrudees main gasbag to rotate the piece, main gasbag receives the extrusion and makes gas enter into from the gasbag, atmospheric pressure grow in the gasbag, from the gasbag inflation, it removes to drive the bolt from the gasbag, the bolt is taken out from the card hole, the bolt makes the spring hold power, but first connecting rod and rotation piece relative rotation this moment, along with the continuation rotation of rotating the piece, it continues the downstream through second connecting rod and third connecting rod drive slide to rotate the piece, the slotting tool continues the feed, and first connecting rod is in quiescent condition, thereby make the workstation be in quiescent condition, and like this, when the slotting tool processing collet groove, the workstation is in quiescent condition, thereby make the precision of the collet groove of processing higher. After the lock presss from both sides groove and groove edge chamfer and finishes, when making to rotate a reverse rotation, the piece that rotates keeps away from main gasbag gradually, the extrusion degree that main gasbag received reduces, gas in the follow gasbag gradually enters into main gasbag, from the gasbag shrink, along with the rotation of rotating the piece, treat that card hole is relative again with the bolt, the bolt is under the elastic force effect of spring and insert card hole in, first connecting rod links together with the piece that rotates, it continues to drive first connecting rod pendulum, first connecting rod makes workstation reverse movement.
Further, the top of the box body is provided with an inclined opening for the chamfer surface to pass through. The inclined opening is convenient for exposing the chamfer surface of the sliding plate from the top of the box body.
Furthermore, a supporting seat is arranged on the workbench, a supporting rod is fixedly connected to the supporting seat, and the driven chain wheel is rotatably connected to the supporting rod. Thereby, the mounting and fixing of the driven sprocket is achieved.
Furthermore, a vertical rod is connected between the slotting cutter and the sliding plate. From this, the slide links together through montant and slotting tool, has realized that slotting tool and slide move jointly.
Drawings
FIG. 1 is a longitudinal cross-sectional view of a finishing treatment device for the end of an exhaust valve stem;
FIG. 2 is a top view of the right side table of FIG. 1;
FIG. 3 is a right side view of the slotter knife on the right side of FIG. 1;
FIG. 4 is a schematic view of the connection of the driven sprocket to the support shaft;
fig. 5 is a left side view of the connection structure of the first link on the left side and the sector gear on the left side in fig. 1;
FIG. 6 is a schematic view of a valve stem configuration;
reference numerals in the drawings of the specification include: the device comprises a box body 1, a sector gear 2, a main air bag 3, a fourth connecting rod 4, a first connecting rod 5, a second connecting rod 6, a third connecting rod 7, a sliding plate 8, a workbench 9, a supporting seat 10, a supporting rod 11, a chain 12, a driven chain wheel 13, a slotting cutter 14, a vertical rod 15, a motor 16, a chamfering block 17, a cutting edge 18, a cross rod 19, a triangular chuck 20, a bearing 21, a baffle 22, a bolt 23, a slave air bag 24, a pressure spring 25, a sliding cavity 26, a rotating rod 27, a locking and clamping groove 28, a small-end chamfer 29 and a groove edge 30.
Detailed Description
The following is further detailed by way of specific embodiments:
the embodiment is basically as shown in the attached figures 1-6: be used for finish machining processing apparatus of blast gate rod tip, including frame and box 1, vertical sliding connection has slide 8 in the box 1, and is concrete, is equipped with the slider on the slide 8, is equipped with the spout of vertical setting on the left and right inner wall of box 1, and slider sliding connection is in the spout. The top of the left end part and the top of the right end part of the sliding plate 8 are both provided with inclined chamfer surfaces, the chamfer surfaces have the polishing effect of chamfers, and the left end and the right end of the top of the box body 1 are both provided with inclined openings for the chamfer surfaces of the left end part and the right end part of the sliding plate 8 to pass through. Left side at the top of box 1, right side lateral sliding is connected with two workstations 9, workstation 9 is also lateral sliding connection in the frame, all be equipped with on two workstations 9 and be used for driving valve stem pivoted actuating mechanism, it is concrete, combine shown in fig. 2 and fig. 4, the welding has three supporting seat 10 on the workstation 9, all the welding has bracing piece 11 on the three supporting seat 10, actuating mechanism includes a drive sprocket and three driven sprocket 13, driven sprocket 13 rotates through bearing 21 and connects on bracing piece 11, be equipped with triangle chuck 20 on driven sprocket 13's the tip of keeping away from bracing piece 11, be connected with chain 12 between driven sprocket 13 and the drive sprocket, be connected with motor 16 on the drive sprocket.
As shown in fig. 3, six slotter knives 14 are arranged above the workbench 9, each three slotter knives 14 form a group, the group of the left slotter knives 14 is located above the left workbench 9, and the group of the right slotter knives 14 is located above the right workbench 9. A cross rod 19 is connected between the three slotting tools 14 in each group, and a vertical rod 15 is connected between the cross rod 19 and the sliding plate 8; the chamfering blocks 17 are welded to both sides of the cutting edge 18 at the bottom of the slotter knife 14. Two rotating parts are rotatably connected to the box body 1, the rotating parts in the embodiment are sector gears 2, and two main airbags 3 which can abut against the sector gears 2 are adhered to the bottom of the box body 1. The sector gear 2 is connected with a first connecting rod 5, as shown in fig. 5, the sector gear 2 is rotatably connected with the first connecting rod 5 at a position of the box body 1 through a rotating rod 27, a clamping hole is formed in the first connecting rod 5, a sliding cavity 26 is formed in the sector gear 2, a bolt 23 is slidably connected in the sliding cavity 26, a baffle 22 is arranged at the right end of the bolt 23, a pressure spring 25 enabling the bolt 23 to be inserted into the clamping hole is connected between the baffle 22 and the right inner wall of the sliding cavity 26, a telescopic cylinder is sleeved on the outer side of the pressure spring 25, a slave airbag 24 enabling the bolt 23 to be drawn out from the clamping hole is arranged between the baffle 22 and the left inner wall of the sliding cavity 26, the slave airbag 24 is annular, the bolt 23 penetrates through the slave airbag 24, the master airbag 3 is communicated with the slave airbag 24 through an air pipe, and the slave airbag 24 is annular. The top of first connecting rod 5 rotates through the round pin axle and connects on workstation 9, and the welding has second connecting rod 6 on the position that sector gear 2 is connected with the rotation of box 1, and the top of second connecting rod 6 rotates through the round pin axle and is connected with third connecting rod 7, and the top of third connecting rod 7 rotates through the round pin axle and connects on slide 8, rotates through the round pin axle on the box 1 and is connected with fourth connecting rod 4, and the top of fourth connecting rod 4 rotates through the round pin axle and connects on workstation 9. In the practical process, the sector gear 2 on the left side can be coaxially connected with a hand wheel, so that the sector gear 2 can be rotated manually.
The specific implementation process is as follows: six valve stems are fixed by triangular chucks 20 on driven sprockets 13 on two tables 9, respectively, and the right end of the valve stem on the left side is extended from the right end of the table 9, and the left end of the valve stem on the right side is extended from the left end of the table 9.
The motor 16 is started, the motor 16 drives the driving chain wheel to rotate, the driving chain wheel drives the driven chain wheel 13 to rotate through the chain 12, and the driven chain wheel 13 drives the valve rod to rotate together through the triangular chuck 20. Rotate the hand wheel, make the hand wheel drive left sector gear 2 clockwise rotation, left sector gear 2 drives 2 anticlockwise rotations of sector gear on right side through the meshing, because bolt 23 on the sector gear 2 inserts in the card hole of first connecting rod 5, so left sector gear 2 drives first connecting rod 5 clockwise swing, sector gear 2 on right side drives first connecting rod 5 anticlockwise swing, two first connecting rods 5 are close to each other, first connecting rod 5 makes two workstations 9 be close to each other, workstation 9 drives the valve stem and removes the below of slotting cutter 14, and fourth connecting rod 4 follows the removal of workstation 9 and swings. Simultaneously, left sector gear 2 drives second connecting rod 6 clockwise swing, and second connecting rod 6 drives slide 8 downstream through third connecting rod 7, and similarly, sector gear 2 on right side also makes slide 8 downstream through second connecting rod 6 and third connecting rod 7, and slide 8 drives slotting tool 14 downstream through montant 15, and slotting tool 14 is close to the valve stem to the feed has been realized. With the continuous rotation of the sector gear 2, the bottom of the sector gear 2 abuts against the main airbag 3, the main airbag 3 is squeezed to press gas into the secondary airbag 24 through the gas pipe, the gas pressure in the secondary airbag 24 increases, the secondary airbag 24 expands, the baffle plate 22 is pushed by the airbag 24 to slide in the sliding cavity 26 in a direction away from the first connecting rod 5, the baffle plate 22 drives the bolt 23 to be drawn out from the clamping hole, the first connecting rod 5 is separated from the fixation of the sector gear 2, the sector gear 2 can rotate relative to the first connecting rod 5 through the rotating rod 27, so that in the rotation of the sector gear 2, the first connecting rod 5 does not swing along with the sector gear 2, the workbench 9 is in a static state, the sliding plate 8 continues to be in a downward moving state, the sliding plate 8 drives the slotting tool 14 to move downward through the vertical rod 15, the slotting tool 14 abuts against the rotating valve stem, the slotting tool 14 opens a clamping groove 28 as shown in fig. 6 on the valve stem, as the slotter knife 14 continues to move down, the chamfer block 17 on the slotter knife 14 abuts the slot edge 30 of the latching and clamping slot 28, and the chamfer block 17 chamfers the slot edge 30.
After the groove chamfering process of the collet groove 28 and the groove edge 30, it is necessary to perform a small end chamfering process on the end of the valve stem. At this time, the hand wheel is rotated counterclockwise, the hand wheel drives the left sector gear 2 to rotate counterclockwise, and the right sector gear 2 rotates clockwise under the meshing action. The sector gear 2 upwards pushes the sliding plate 8 under the action of the second connecting rod 6 and the third connecting rod 7, the sliding plate 8 upwards moves, the sliding plate 8 drives the slotting tool 14 to upwards move through the vertical rod 15, the slotting tool 14 is far away from the valve rod, and tool retracting of the slotting tool 14 is realized. Meanwhile, the sector gear 2 leaves the main airbag 3 gradually, the degree of extrusion of the main airbag 3 is reduced, gas in the air bag 24 enters the main airbag 3 through an air pipe, the air bag 24 contracts, the baffle plate 22 slides in the direction close to the first connecting rod 5 under the action of the pressure spring 25, along with the rotation of the sector gear 2, a clamping hole in the first connecting rod 5 is opposite to the bolt 23 at all times, at the moment, the bolt 23 is inserted into the clamping hole under the action of the pressure spring 25, the first connecting rod 5 and the sector gear 2 are fixedly connected together again, the sector gear 2 drives the first connecting rod 5 to swing reversely, namely, the first connecting rod 5 on the left side swings anticlockwise, the first connecting rod 5 on the right side swings clockwise, the two workbenches 9 are far away from each other under the action of the first connecting rod 5, and the fourth connecting rod 4 swings along with the movement of the workbenches 9. After the sliding plate 8 slides upwards to the top, the chamfer surfaces at the two ends of the sliding plate 8 extend out of the inclined openings at the two ends of the top of the box body 1, the two working tables 9 also move to the two sides of the box body 1 just, the end part of the valve rod, which is far away from the driven chain wheel 13, is attached to the chamfer surfaces on the sliding plate 8, and the small end chamfer 29 treatment of the end part of the valve rod is realized under the rotation of the valve rod.
After the small-end chamfer 29 is machined, the motor 16 stops rotating, and the valve rod is taken down, so that the valve rod is machined in batches, the three steps of machining the clamping groove 28 of the valve rod, chamfering the groove edge 30 and processing the small-end chamfer 29 are carried out on the same equipment, the operation is simple and convenient, and the cost for purchasing equipment by enterprises is saved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various changes and modifications without departing from the concept of the present invention, and these should be construed as the scope of protection of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent. The techniques, shapes, and structural parts, which are omitted from the description of the present invention, are all known techniques.
Claims (6)
1. A be used for exhaust valve rod tip finish machining processing apparatus which characterized in that: the valve rod automatic chamfering device comprises a box body, wherein a sliding plate is vertically and slidably connected onto the box body, an inclined chamfering surface is arranged at the end part of the sliding plate, a workbench is transversely and slidably connected onto the top of the box body, a driving mechanism for driving a valve rod to rotate is arranged on the workbench, a slotting cutter is arranged above the workbench, chamfering blocks are arranged on two sides of a cutting edge of the slotting cutter, and the slotting cutter and the sliding plate synchronously move; the utility model discloses a rotary connecting device, including box, first connecting rod, second connecting rod, third connecting rod, fourth connecting rod, rotation is connected with the rotation piece on the box, rotate first connecting rod and the second connecting rod of fixedly connected with on the rotation piece, the one end rotation connection of rotating the piece is kept away from to first connecting rod is on the workstation, the one end rotation connection of rotating the piece is kept away from to the second connecting rod is connected with the third connecting rod, the third connecting rod rotates and connects on the slide, the rotation is connected with the fourth connecting rod on the box, the one.
2. The finishing treatment device for the end of an exhaust valve stem according to claim 1, characterized in that: the driving mechanism comprises a driving chain wheel and a plurality of rotatable driven chain wheels, triangular chucks are arranged at the end parts of the driven chain wheels, chains are connected between the driven chain wheels and the driving chain wheels, and the driving chain wheels are connected with motors.
3. The finishing treatment device for the end of an exhaust valve stem according to claim 1, characterized in that: the fan-shaped rotary part is characterized in that a main airbag is arranged at the bottom of the box body, the rotary part is rotatably connected to the position of the box body and rotatably connected with a first connecting rod, a clamping hole is formed in the first connecting rod, a sliding cavity is formed in the rotary part, a bolt is slidably connected in the sliding cavity, a spring enabling the bolt to be inserted into the clamping hole is connected to the bolt, a secondary airbag used for enabling the bolt to be drawn out from the clamping hole is arranged in the sliding cavity, and the main airbag is communicated with the secondary airbag.
4. The finishing treatment device for the end of an exhaust valve stem according to claim 1, characterized in that: the top of the box body is provided with an inclined opening for the chamfer surface to pass through.
5. The finishing treatment apparatus for an end of an exhaust valve rod according to claim 2, characterized in that: the supporting seat is arranged on the workbench, the supporting seat is fixedly connected with a supporting rod, and the driven chain wheel is rotatably connected to the supporting rod.
6. The finishing treatment device for the end of an exhaust valve stem according to claim 1, characterized in that: a vertical rod is connected between the slotting cutter and the sliding plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811625472.0A CN109434473B (en) | 2018-12-28 | 2018-12-28 | Finish machining device for end part of exhaust valve rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811625472.0A CN109434473B (en) | 2018-12-28 | 2018-12-28 | Finish machining device for end part of exhaust valve rod |
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| Publication Number | Publication Date |
|---|---|
| CN109434473A CN109434473A (en) | 2019-03-08 |
| CN109434473B true CN109434473B (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811625472.0A Expired - Fee Related CN109434473B (en) | 2018-12-28 | 2018-12-28 | Finish machining device for end part of exhaust valve rod |
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| CN111066645B (en) * | 2020-01-03 | 2021-09-10 | 佛山市嘉沃农业科技合伙企业（有限合伙） | Aquatic plant cultivation device capable of automatically adding nutrient solution in equal proportion according to surplus |
| CN111615891A (en) * | 2020-06-19 | 2020-09-04 | 广州睿喑科技有限公司 | Dig hole and integrative scientific and technological intelligent seeder of seeding |
| CN113814914B (en) * | 2021-11-02 | 2022-11-18 | 重庆德卡汽车零部件制造有限公司 | Automobile differential shell machining clamp |
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| JPS632602A (en) * | 1986-06-20 | 1988-01-07 | Toshiba Corp | Pipe end machining tool |
| CN202715891U (en) * | 2012-05-29 | 2013-02-06 | 尹时中 | Precision processing equipment for hard broaching of internal keyway surfaces |
| CN102699419B (en) * | 2012-05-29 | 2014-04-30 | 尹时中 | Hard broaching finish machining process for surface of internal keyway and device |
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Effective date of registration: 20210128 Address after: 401520 no.63-2, Xinyou Road, Yinxiang new town, Tuchang Town, Hechuan District, Chongqing Patentee after: Chongqing henglei industry and Trade Co., Ltd Address before: 401520 sankou village, Tuchang Town, Hechuan District, Chongqing Patentee before: CHONGQING JIANDA HENGYI VALVE Co.,Ltd. |
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