CN111843512A - Hydraulic hose universal joint machining production line and machining process - Google Patents
Hydraulic hose universal joint machining production line and machining process Download PDFInfo
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- CN111843512A CN111843512A CN202010639996.6A CN202010639996A CN111843512A CN 111843512 A CN111843512 A CN 111843512A CN 202010639996 A CN202010639996 A CN 202010639996A CN 111843512 A CN111843512 A CN 111843512A
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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
- B23P23/06—Metal-working plant comprising a number of associated machines or apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
- B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
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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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
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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
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/11—Joints, e.g. ball joints, universal joints
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Abstract
The invention belongs to the technical field of hose universal joints, in particular to a hydraulic hose universal joint processing production line and a processing technology, which comprises a casting process for casting a workpiece, a cutting process for processing the workpiece, an installation process for installing a part and a detection process for detecting a product, wherein the casting process comprises a raw material mixing mechanism, a casting forming mechanism, a heat treatment mechanism and a grinding mechanism which are sequentially distributed, the raw material mixing mechanism and the casting forming mechanism are used for casting raw materials into a part blank, and the heat treatment mechanism is used for increasing the strength of the part blank; the product that will install is placed on fixture to by fixture to carry out the centre gripping to the product, then with the both ends sealing connection of leakproofness detection mechanism and product, actuating mechanism drive product removes, makes the relative rotation take place in the position that turns to of product, and whether the observation has the phenomenon of revealing, improves the qualification rate that the product dispatched from the factory.
Description
Technical Field
The invention belongs to the technical field of hose universal joints, and particularly relates to a hydraulic hose universal joint processing production line and a hydraulic hose universal joint processing technology.
Background
The universal joint is used for connecting the pipeline and the pipeline so as to adjust the angle of the two pipelines, and when the two pipelines are adjusted in an angle rotating mode, leakage cannot occur, the universal joint is widely applied to equipment which needs to be inclined and rotated on the pipeline, and in the hydraulic field, the universal joint can achieve the purpose of connecting hydraulic hoses, so that the two hydraulic hoses can be inclined and rotated relatively.
The existing hydraulic hose universal joint processing production line and the existing hydraulic hose universal joint processing technology need to detect the produced universal joint, and the existing detection equipment cannot rotate rotating parts of products when being used for observing water injection, so that the detection result is not accurate.
Disclosure of Invention
To solve the problems set forth in the background art described above. The invention provides a hydraulic hose universal joint machining production line and a machining process, and has the characteristic of high detection precision.
In order to achieve the purpose, the invention provides the following technical scheme: hydraulic hose universal joint machining production line, including the casting process that is used for casting the work piece, the cutting process that is used for processing the work piece, the installation process that is used for installing the part and the detection process that is used for detecting the product, the casting process is including the raw materials mixing mechanism, the casting forming mechanism, heat treatment mechanism and the grinding machanism that distribute in order, raw materials mixing mechanism with the casting forming mechanism is used for casting into the part stock with the raw materials, heat treatment mechanism is used for increasing the intensity of part stock, grinding machanism is used for polishing the part stock surface, the cutting process includes rough machining mechanism, finish machining mechanism and the spraying coating mechanism that distributes in order, rough machining mechanism with the finish machining mechanism is used for machine-shaping part stock, spraying coating mechanism is used for spraying coating to fashioned part surface, the installation process includes the part classification mechanism that distributes in order, Sealing member installation mechanism, sealed glue coating mechanism and spare part block mechanism, part sorting mechanism is used for categorizing the part, sealing member installation mechanism is used for installing the sealing member to the part inside, sealed glue coating mechanism is used for sealed glue of part coating, spare part block mechanism is used for assembling each spare part block, the detection process is including fixture, actuating mechanism and the leakproofness detection mechanism that distributes in order, fixture is used for carrying out the centre gripping to the finished product, leakproofness detection mechanism is used for supplying water to the finished product, actuating mechanism is used for driving the finished product and carries out circular motion.
The machining process of the hydraulic hose universal joint machining production line is characterized in that: the method comprises the following steps:
s1: adding raw materials for casting into the raw material mixing mechanism, mixing by the raw material mixing mechanism, and then conveying the mixed raw materials into the casting forming mechanism, wherein the casting forming mechanism melts the raw materials and then casts the raw materials into a part blank;
s2: the heat treatment mechanism carries out heat treatment on the part blank to eliminate internal stress and improve the strength of the part blank, and then the polishing mechanism polishes the part blank to improve the flatness of the surface of the part;
s3: the rough machining mechanism carries out rapid rough machining on the part blank, then the finish machining mechanism carries out finish machining to meet the assembly size requirement, and then the spraying mechanism carries out spraying of anti-rust paint on the surface of the part to improve the anti-rust performance of the surface of the part;
s4: the part sorting mechanism sorts the processed parts, the sealing element mounting mechanism mounts the sealing elements on the parts, the sealing adhesive coating mechanism coats the parts with sealing adhesive to improve the sealing effect when the parts are matched, and the part clamping mechanism mounts each part;
S5: the installed product is placed on the clamping mechanism, the clamping mechanism clamps the product, then the sealing detection mechanism is connected with two ends of the product in a sealing mode, the actuating mechanism drives the product to move, the steering part of the product rotates relatively, and whether a leakage phenomenon exists or not is observed.
Preferably, the clamping mechanism comprises a limiting ring and four threaded pipes which penetrate through the limiting ring at intervals, and threaded rods penetrate through the four threaded pipes in a threaded manner.
Preferably, one end of each of the four screw rods is fixedly connected with a contact head, and the contact heads are located on the inner side of the limiting ring.
Preferably, the contact is spherical.
Preferably, the actuating mechanism includes the install bin and fixes the extension board at its inner wall, the top fixedly connected with step motor of extension board, step motor and external power source electric connection, the coaxial fixedly connected with carousel of step motor's output, the top surface of carousel is connected with the slide bar along rotating outward, the spout has been seted up to one side intermediate position department of install bin, the sliding sleeve is equipped with the slider on the slide bar, the slider slides in the spout, the spacing ring with the slide bar is kept away from the one end fixed connection of carousel.
Preferably, the inner wall of the sliding groove is fixedly connected with a sliding rail, and the sliding block is connected with the sliding rail in a sliding manner.
Preferably, the tightness detection mechanism comprises a lower support plate and a hose which penetrates through the lower support plate in a sliding mode, the top end of the hose is connected with a joint in a sealing mode, the joint is located below the clamping mechanism, the detection process further comprises an upper support plate and a spring fixed to the bottom surface of the upper support plate, a sealing head is fixedly connected to the bottom end of the spring and located above the clamping mechanism, and the lower support plate and the upper support plate are fixedly connected with the installation box.
Preferably, the spring is an extension spring.
Preferably, the length of the screw is greater than the 1/2 inner diameter of the stop collar.
Compared with the prior art, the invention has the beneficial effects that:
the product that will install is placed on fixture to carry out the centre gripping to the product by fixture, then with the both ends sealing connection of leakproofness detection mechanism and product, actuating mechanism drive product removes, makes the relative rotation take place in the position that turns to of product, and whether the observation has the phenomenon of revealing, and the sealed effect of detectable rotating member under the long-time relative pivoted condition improves the qualification rate that the product dispatched from the factory simultaneously.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a production flow diagram of the present invention;
FIG. 2 is a schematic structural view of a sealing performance testing mechanism according to the present invention;
FIG. 3 is a schematic view of the actuating mechanism of the present invention;
FIG. 4 is a schematic view of a clamping mechanism according to the present invention;
in the figure: 1. a casting process; 11. a raw material mixing mechanism; 12. a casting forming mechanism; 13. a heat treatment mechanism; 14. a polishing mechanism; 2. a cutting process; 21. a rough machining mechanism; 22. a finish machining mechanism; 23. a spraying mechanism; 3. an installation procedure; 31. a part sorting mechanism; 32. a seal mounting mechanism; 33. a sealant coating mechanism; 34. a component engaging mechanism; 4. a detection process; 401. a chute; 41. a clamping mechanism; 411. a limiting ring; 412. a threaded pipe; 413. a screw; 414. a contact head; 42. an actuating mechanism; 421. installing a box; 422. a support plate; 423. a stepping motor; 424. a turntable; 425. a slide bar; 426. a slider; 427. a slide rail; 43. a sealing performance detection mechanism; 431. a lower support plate; 432. a hose; 433. a joint; 434. an upper support plate; 435. a spring; 436. and (6) sealing the head.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides the following technical solutions: the hydraulic hose universal joint machining production line comprises a casting process 1 for casting a workpiece, a cutting process 2 for machining the workpiece, an installation process 3 for installing a part and a detection process 4 for detecting a product, wherein the casting process 1 comprises a raw material mixing mechanism 11, a casting forming mechanism 12, a heat treatment mechanism 13 and a grinding mechanism 14 which are sequentially distributed, the raw material mixing mechanism 11 and the casting forming mechanism 12 are used for casting raw materials into a part blank, the heat treatment mechanism 13 is used for increasing the strength of the part blank, the grinding mechanism 14 is used for grinding the surface of the part blank, the cutting process 2 comprises a rough machining mechanism 21, a fine machining mechanism 22 and a spraying mechanism 23 which are sequentially distributed, the rough machining mechanism 21 and the fine machining mechanism 22 are used for machining and forming the part blank, the spraying mechanism 23 is used for spraying the surface of the formed part, and the installation process 3 comprises a part classifying mechanism 31 which is sequentially distributed, The part sorting mechanism 31 is used for classifying parts, the sealing element mounting mechanism 32 is used for mounting sealing elements inside the parts, the sealing adhesive coating mechanism 33 is used for coating sealing adhesive on the parts, the part clamping mechanism 34 is used for assembling and clamping all the parts, the detection process 4 comprises a clamping mechanism 41, an action mechanism 42 and a sealing property detection mechanism 43 which are sequentially distributed, the clamping mechanism 41 is used for clamping finished products, the sealing property detection mechanism 43 is used for supplying water to the finished products, and the action mechanism 42 is used for driving the finished products to perform circular motion.
The processing technology of the hydraulic hose universal joint processing production line comprises the following steps:
s1: adding raw materials for casting into the raw material mixing mechanism 11, mixing by the raw material mixing mechanism 11, then conveying the mixed raw materials into the casting forming mechanism 12, melting the raw materials by the casting forming mechanism 12, and then casting into a part blank;
s2: the heat treatment mechanism 13 carries out heat treatment on the part blank to eliminate internal stress and improve the strength of the part blank, and then the polishing mechanism 14 polishes the part blank to improve the flatness of the surface of the part;
s3: the rough machining mechanism 21 carries out rapid rough machining on the part blank, then the finish machining mechanism 22 carries out finish machining to enable the part blank to meet the assembly size requirement, and then the spraying mechanism 23 carries out spraying anti-rust paint on the surface of the part to improve the anti-rust performance of the surface of the part;
s4: the part classifying mechanism 31 classifies processed parts, the sealing element mounting mechanism 32 mounts the sealing element on the part, the sealing adhesive coating mechanism 33 coats the part with sealing adhesive, so as to improve the sealing effect when the part is matched, and the part clamping mechanism 34 mounts each part;
S5: the installed product is placed on the clamping mechanism 41, the clamping mechanism 41 clamps the product, then the sealing detection mechanism 43 is connected with two ends of the product in a sealing mode, the actuating mechanism 42 drives the product to move, the turning portion of the product rotates relatively, and whether the leakage phenomenon exists or not is observed.
In this embodiment: the casting process 1 carries out melting casting on raw materials, the heat treatment mechanism 13 carries out heat treatment on the part blank to eliminate internal stress and improve the strength of the part blank, the cutting process 2 carries out cutting processing on the part blank, the spraying mechanism 23 carries out spraying anti-rust paint on the surface of the part to improve the anti-rust performance of the surface of the part, the mounting process 3 carries out classified assembly on the processed part, finally, the mounted product is placed on the clamping mechanism 41 and clamped by the clamping mechanism 41, then the tightness detection mechanism 43 is hermetically connected with two ends of the product, the action mechanism 42 drives the product to move, the steering part of the product rotates relatively, whether leakage phenomenon exists or not is observed, and the product delivery qualification rate is improved.
Specifically, the clamping mechanism 41 includes a limiting ring 411 and four threaded pipes 412 which penetrate through the limiting ring 411 at intervals, and threaded rods 413 are screwed on the four threaded pipes 412; the product is placed on the inner side of the limiting ring 411, the four screws 413 are rotated, and the four screws 413 move inwards along the threaded pipes 412 respectively to clamp the product.
Specifically, one end of each of the four screws 413 is fixedly connected with a contact head 414, and the contact heads 414 are located on the inner side of the limit ring 411; the contact head 414 contacts the product and the screw 413 directly contacts the product to cause scratching.
Specifically, the contact 414 is spherical; can compress tightly the contact with multiple curved surfaces, the suitability is higher.
Specifically, the actuating mechanism 42 includes a mounting box 421 and a support plate 422 fixed on the inner wall thereof, the top end of the support plate 422 is fixedly connected with a stepping motor 423, the stepping motor 423 is electrically connected with an external power supply, the output end of the stepping motor 423 is coaxially and fixedly connected with a rotary plate 424, the top outer edge of the rotary plate 424 is rotatably connected with a slide bar 425, a slide groove 401 is formed in the middle position of one side of the mounting box 421, a slide block 426 is slidably sleeved on the slide bar 425, the slide block 426 slides in the slide groove 401, and a limit ring 411 is fixedly connected with one end of the slide bar 425 far away from; step motor 423 drives turntable 424 to rotate, and the connection point of slide bar 425 and turntable 424 rotates synchronously, and simultaneously slide bar 425 slides at slider 426, and slider 426 slides along spout 401 for the inside product of spacing ring 411 carries out circular motion.
Specifically, the inner wall of the sliding groove 401 is fixedly connected with a sliding rail 427, and the sliding block 426 is connected with the sliding rail 427 in a sliding manner; the slider 426 slides along the slide rail 427, and the slide of the slider 426 is guided.
Specifically, the tightness detection mechanism 43 comprises a lower support plate 431 and a hose 432 slidably penetrating through the lower support plate 431, the top end of the hose 432 is hermetically connected with a joint 433, the joint 433 is positioned below the clamping mechanism 41, the detection process 4 further comprises an upper support plate 434 and a spring 435 fixed on the bottom surface of the upper support plate 434, the bottom end of the spring 435 is fixedly connected with a sealing head 436, the sealing head 436 is positioned above the clamping mechanism 41, and both the lower support plate 431 and the upper support plate 434 are fixedly connected with the installation box 421; the joint 433 is connected with one end of a product in a sealing mode, the sealing head 436 is connected with the other end of the product in a sealing mode, an external high-pressure water source enters the interior of the product through the hose 432, when the product does circular motion, the upper portion of the product is subjected to oblique tension of the spring 435, the lower portion of the product is subjected to oblique tension of the hose 432 and the joint 433, the hose 432 slides up and down along the lower support plate 431, and under the action of inertia, the rotating part of the product can rotate relatively, whether water leaks out when the rotating part rotates is tested, the sealing degree of the product is detected, and meanwhile the sealing effect of the rotating part under the condition of long-time relative rotation can be detected.
Specifically, the spring 435 is an extension spring; an effective pulling force is provided to prevent the spring 435 from plastically deforming.
Specifically, the length of the screw 413 is greater than the 1/2 inner diameter of the limiting ring 411; the clamping device can clamp products with different sizes, and the adjusting range is large.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Hydraulic hose universal joint processing lines, its characterized in that: the workpiece grinding device comprises a casting process (1) for casting a workpiece, a cutting process (2) for machining the workpiece, an installation process (3) for installing a part and a detection process (4) for detecting a product, wherein the casting process (1) comprises a raw material mixing mechanism (11), a casting forming mechanism (12), a heat treatment mechanism (13) and a grinding mechanism (14) which are sequentially distributed, the raw material mixing mechanism (11) and the casting forming mechanism (12) are used for casting raw materials into a part blank, the heat treatment mechanism (13) is used for increasing the strength of the part blank, the grinding mechanism (14) is used for grinding the surface of the part blank, the cutting process (2) comprises a rough machining mechanism (21), a fine machining mechanism (22) and a spraying mechanism (23) which are sequentially distributed, and the rough machining mechanism (21) and the fine machining mechanism (22) are used for machining and forming the part blank, the spraying mechanism (23) is used for spraying the fashioned part surface, installation process (3) are including the part classification mechanism (31), sealing member installation mechanism (32), sealed glue coating mechanism (33) and the spare part block mechanism (34) that distribute in order, part classification mechanism (31) are used for categorizing the part, sealing member installation mechanism (32) are used for installing the sealing member to the part inside, sealed glue coating mechanism (33) are used for coating sealed glue to the part, spare part block mechanism (34) are used for assembling each spare part block, detection process (4) are including fixture (41), actuating mechanism (42) and leakproofness detection mechanism (43) that distribute in order, fixture (41) are used for carrying out the centre gripping to the finished product, leakproofness detection mechanism (43) are used for supplying water to the finished product, the actuating mechanism (42) is used for driving the finished product to do circular motion.
2. The machining process of the hydraulic hose universal joint machining production line according to claim 1, characterized in that: the method comprises the following steps:
s1: adding raw materials for casting into the raw material mixing mechanism (11), mixing by the raw material mixing mechanism (11), and then conveying the mixed raw materials into the casting forming mechanism (12), wherein the casting forming mechanism (12) melts the raw materials and then casts the raw materials into a part blank;
s2: the heat treatment mechanism (13) carries out heat treatment on the part blank to eliminate internal stress and improve the strength of the part blank, and then the polishing mechanism (14) polishes the part blank to improve the flatness of the surface of the part;
s3: the rough machining mechanism (21) carries out rapid rough machining on a part blank, then the finish machining mechanism (22) carries out finish machining to enable the part blank to meet the assembly size requirement, and then the spraying mechanism (23) carries out spraying anti-rust paint on the surface of the part to improve the anti-rust performance of the surface of the part;
s4: the part classifying mechanism (31) classifies processed parts, the sealing element mounting mechanism (32) mounts the sealing elements on parts, the sealing adhesive coating mechanism (33) coats the parts with sealing adhesive to improve the sealing effect of the parts during matching, and the part clamping mechanism (34) mounts each part;
S5: the installed product is placed on the clamping mechanism (41), the clamping mechanism (41) clamps the product, then the sealing detection mechanism (43) is connected with two ends of the product in a sealing mode, the actuating mechanism (42) drives the product to move, the turning portion of the product rotates relatively, and whether leakage occurs or not is observed.
3. The hydraulic hose universal joint machining production line as claimed in claim 1, characterized in that: the clamping mechanism (41) comprises a limiting ring (411) and four threaded pipes (412) penetrating through the limiting ring (411) at intervals, and threaded rods (413) penetrate through the four threaded pipes (412) in a threaded mode.
4. The hydraulic hose universal joint machining production line as claimed in claim 3, characterized in that: four the equal fixedly connected with contact head (414) of one end of screw rod (413), contact head (414) are located spacing ring (411) inboard.
5. The hydraulic hose universal joint machining production line of claim 4, characterized in that: the contact (414) is spherical.
6. The hydraulic hose universal joint machining production line as claimed in claim 3, characterized in that: actuating mechanism (42) include install bin (421) and fix extension board (422) at its inner wall, the top fixedly connected with step motor (423) of extension board (422), step motor (423) and external power source electric connection, the coaxial fixedly connected with carousel (424) of output of step motor (423), the top surface of carousel (424) is connected with slide bar (425) along rotating outward, spout (401) have been seted up to one side intermediate position department of install bin (421), sliding sleeve is equipped with slider (426) on slide bar (425), slider (426) slide in spout (401), spacing ring (411) with slide bar (425) are kept away from the one end fixed connection of carousel (424).
7. The hydraulic hose universal joint machining production line of claim 6, characterized in that: the inner wall of the sliding groove (401) is fixedly connected with a sliding rail (427), and the sliding block (426) is connected with the sliding rail (427) in a sliding mode.
8. The hydraulic hose universal joint machining production line of claim 6, characterized in that: the tightness detection mechanism (43) comprises a lower support plate (431) and a hose (432) which penetrates through the lower support plate (431) in a sliding mode, the top end of the hose (432) is connected with a joint (433) in a sealing mode, the joint (433) is located below the clamping mechanism (41), the detection process (4) further comprises an upper support plate (434) and a spring (435) fixed to the bottom surface of the upper support plate, a sealing head (436) is fixedly connected to the bottom end of the spring (435), the sealing head (436) is located above the clamping mechanism (41), and the lower support plate (431) and the upper support plate (434) are fixedly connected with the installation box (421).
9. The hydraulic hose universal joint machining production line as claimed in claim 8, characterized in that: the spring (435) is an extension spring.
10. The hydraulic hose universal joint machining production line as claimed in claim 3, characterized in that: the length of the screw (413) is larger than the 1/2 inner diameter of the limiting ring (411).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010639996.6A CN111843512B (en) | 2020-07-06 | 2020-07-06 | Hydraulic hose universal joint machining production line and machining process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010639996.6A CN111843512B (en) | 2020-07-06 | 2020-07-06 | Hydraulic hose universal joint machining production line and machining process |
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| CN111843512A true CN111843512A (en) | 2020-10-30 |
| CN111843512B CN111843512B (en) | 2022-07-22 |
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| US20200132129A1 (en) * | 2018-10-24 | 2020-04-30 | Jtekt Corporation | Manufacturing method and manufacturing apparatus for universal joint |
| CN111300071A (en) * | 2019-12-09 | 2020-06-19 | 长沙市雷锋重型锻造有限公司 | Production line for engineering machinery parts |
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| CN102896497A (en) * | 2012-10-22 | 2013-01-30 | 江苏和信石油机械有限公司 | Automatic production line device of oil drill rod joints |
| CN102975028A (en) * | 2012-11-30 | 2013-03-20 | 天津市天锻压力机有限公司 | Production line for producing oil drill rod joint |
| US20200132129A1 (en) * | 2018-10-24 | 2020-04-30 | Jtekt Corporation | Manufacturing method and manufacturing apparatus for universal joint |
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|---|---|
| CN111843512B (en) | 2022-07-22 |
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