CN114029400A - Die height adjusting device for punch press for double-control three-jaw puller production and machining - Google Patents
Die height adjusting device for punch press for double-control three-jaw puller production and machining Download PDFInfo
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- CN114029400A CN114029400A CN202111217049.9A CN202111217049A CN114029400A CN 114029400 A CN114029400 A CN 114029400A CN 202111217049 A CN202111217049 A CN 202111217049A CN 114029400 A CN114029400 A CN 114029400A
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- height adjusting
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- die height
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/04—Movable or exchangeable mountings for tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/20—Storage arrangements; Piling or unpiling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Presses And Accessory Devices Thereof (AREA)
Abstract
The invention discloses a die height adjusting device for a punch press for double-control three-jaw puller production and processing, which comprises die height adjusting equipment for a three-jaw puller punch press, wherein the die height adjusting equipment for the three-jaw puller punch press comprises a base, a transverse pushing mechanism, a stamping die, a multistage die height adjusting mechanism and a scrap processing mechanism, the left end of the base is connected with the transverse pushing mechanism in a sliding manner, a supporting plate is fixed at the right end of the base, the transverse pushing mechanism comprises a vertical plate which is vertically supported and a hydraulic cylinder I which is fixed at the top of the vertical plate, a guide groove is formed in the middle of the base, a sliding block is arranged in the guide groove in a sliding manner, a screw rod is inserted into a thread of the sliding block, a driving motor is arranged at the outer end of the screw rod, the driving motor is arranged on the supporting plate, and a power output end of the driving motor is connected with the end of the screw rod. The die height adjusting device for the punch press for producing and processing the double-control three-jaw puller can achieve the aim of automatically adjusting the die height in multiple stages, and improves the automation degree of the device.
Description
Technical Field
The invention relates to the technical field of three-jaw puller stamping dies, in particular to a die height adjusting device for a punch press, which is used for double-control three-jaw puller production and processing.
Background
Three-jaw pullers are frequently used tools in mechanical maintenance. The three-jaw puller is mainly used for axially detaching a damaged bearing from a shaft and can be used as an internal puller or an external puller. The bearing has two claws and three claws, and the main sizes are the length of the pulling claw, the distance between the pulling claws and the length of the screw rod so as to adapt to bearings with different diameters and different axial installation depths. When the three-jaw puller is used, the screw tip is positioned in the shaft end tip hole to adjust the position of the pull jaw, so that the pull jaw is hooked on the outer ring of the bearing, the rotating handle is rotated to enable the pull jaw to drive the bearing to move outwards along the axial direction for dismounting, and the three-jaw puller needs to be punched by special punching equipment in the production process.
However, the conventional press die for a three-jaw puller press machine has the following problems in the use process: (1) the structure of the stamping die is fixed, the three-jaw puller cannot be adaptively adjusted according to the specification of the three-jaw puller to be processed, when the specification of the three-jaw puller needs to be adjusted, the die needs to be replaced usually, and the operation is complicated; (2) the three-jaw puller punching machine is easy to cause metal scraps to splash in the process of punching the three-jaw puller, and a mechanism for processing the scraps is lacked. For this reason, a corresponding technical scheme needs to be designed to solve the existing technical problems.
Disclosure of Invention
The invention aims to provide a die height adjusting device for a punch press for double-control three-jaw puller production and processing, which solves the technical problems that the structure of a stamping die is fixed, the adaptive adjustment cannot be carried out according to the specification of a three-jaw puller to be processed, and when the specification of the three-jaw puller needs to be adjusted, the die needs to be replaced usually, and the operation is complicated.
In order to achieve the purpose, the invention provides the following technical scheme: a die height adjusting device for a punch press for double-control three-jaw puller production and processing comprises die height adjusting equipment for a three-jaw puller punch press, wherein the die height adjusting equipment for the three-jaw puller punch press comprises a base, a transverse pushing mechanism, a stamping die, a multi-stage die height adjusting mechanism and a scrap processing mechanism, the left end of the base is in sliding connection with the transverse pushing mechanism, a supporting plate is fixed at the right end of the base, the transverse pushing mechanism comprises a vertical plate which is vertically supported and a first hydraulic cylinder which is fixed at the top of the vertical plate, a guide groove is formed in the middle of the base, a sliding block is arranged in the guide groove in a sliding mode, a screw rod is inserted into a thread of the sliding block, a driving motor is arranged at the outer end of the screw rod, the driving motor is arranged on the supporting plate, the power output end of the driving motor is connected with the end of the screw rod, a first transverse plate is arranged at the power output end of the first hydraulic cylinder, two first guide rods are symmetrically inserted into two ends of the first transverse plate, install pneumatic cylinder two in the backup pad, diaphragm two and guide bar two are installed to the outer end and the both sides of pneumatic cylinder two, stamping die includes upper die base and the die holder that the cooperation was used, go up the module mount on horizontal pushing mechanism, the die holder is installed in the backup pad, multistage mould height adjustment mechanism includes one-level adjuster, second grade adjuster and tertiary adjuster, the one-level adjuster is installed in the both ends of diaphragm one, the second grade adjuster is installed in the junction of upper die base and diaphragm, tertiary adjuster is installed on the upper die set, crushed aggregates processing agency installs on the frame.
As a preferred embodiment of the present invention, the upper die holder has a two-section structure and includes a main block and a stamping bottom plate located below the main block, four sets of directional rods are uniformly inserted into the periphery of the main block, and the lower ends of the directional rods are connected to the periphery of the stamping bottom plate.
As a preferred embodiment of the present invention, the primary adjuster is composed of two sets of electric push rods, an adjusting roller and a connecting plate, the electric push rods are symmetrically installed at two ends of the first transverse plate, a power output end of the electric push rods is connected with an end portion of the adjusting roller, the adjusting roller is rotatably connected with the connecting plate, and an outer end of the connecting plate is rotatably connected with an end portion of the first transverse plate.
In a preferred embodiment of the present invention, the two-stage adjuster includes a pressing plate mounted on the first transverse plate in an inclined manner and pressing rollers located at both ends of the pressing plate, and the lower ends of the pressing plate and the pressing rollers are in contact with the adjusting roller.
As a preferred embodiment of the present invention, the three-stage adjuster includes a servo motor mounted on the first transverse plate and a lead screw mounted at a power output end of the servo motor, wherein an adjusting block is sleeved on the lead screw, and the adjusting block is fixed at one side of the stamping bottom plate.
As a preferred embodiment of the invention, a through hole is formed in the middle of the adjusting block, two groups of electromagnetic suction plates are symmetrically arranged inside the through hole, and the electromagnetic suction plates are in contact with the screw rod.
As a preferred embodiment of the present invention, the crushed material processing mechanism includes a plurality of groups of inlet notches uniformly formed on the machine base and a storage box fixed at the bottom of the machine base, and a dust exhaust fan is disposed outside the storage box.
As a preferred embodiment of the invention, two groups of material guide cavity channels are symmetrically arranged on the upper surface of the storage box, the heights of two ends of the two groups of material guide cavity channels are lower than the height of the middle part of the storage box, and two groups of sewage outlets are symmetrically arranged at two ends of the material guide cavity channels.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention designs a die height adjusting device for a punch press, which is specially used for double-control three-jaw puller production and processing, and mainly comprises a base, a transverse pushing mechanism, a stamping die, a multi-stage die height adjusting mechanism and a scrap processing mechanism, wherein one side of the base is provided with the transverse pushing mechanism in a sliding way, the other side of the base is provided with a supporting plate, the transverse pushing mechanism drives an upper die base to move transversely and is matched with a lower die base arranged on the supporting plate for stamping processing, the stamping die is provided with the multi-stage die height adjusting mechanism, the multi-stage die height adjusting mechanism comprises a first-stage adjuster, a second-stage adjuster and a third-stage adjuster, the upper die base is driven by the first-stage adjuster to carry out longitudinal large-amplitude adjustment, the upper die base is longitudinally small-amplitude adjustment by the second-stage adjuster, in addition, the bottom plate structure of the upper die base is longitudinally adjusted by the third-stage adjuster, thereby realizing the multi-stage adjustment of the upper die base, therefore, the die height can be flexibly adjusted, the three-jaw puller can be punched according to the requirement in the actual operation process to perform adaptive adjustment treatment, and the operation is simple and convenient.
2. The die height adjusting device for the punch press for the double-control three-jaw puller production and processing can achieve the aim of automatically adjusting the die height in multiple stages, improves the automation degree of the device, and ensures the cleanliness of equipment in the operation process by designing stamping chips on the base to be accommodated and processed.
Drawings
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is a partial A structural view of the present invention;
FIG. 3 is a partial B structural view of the present invention;
FIG. 4 is a diagram of a conditioning block according to the present invention;
FIG. 5 is a view showing the structure of the storage box according to the present invention.
In the figure, 1, a machine base; 2. a support plate; 3. a vertical plate; 4. a first hydraulic cylinder; 5. a guide groove; 6. a slider; 7. a screw; 8. a drive motor; 9. a first transverse plate; 10. a first guide rod; 11. a second hydraulic cylinder; 12. a transverse plate II; 13. a second guide rod; 14. an upper die holder; 15. a lower die holder; 16. a primary regulator; 17. a secondary regulator; 18. a three-stage regulator; 19. a master block; 20. stamping a bottom plate; 21. an orientation bar; 22. an electric push rod; 23. a regulating roller; 24. a connecting plate; 25. pressing a plate; 26. a compression roller; 27. a servo motor; 28. a lead screw; 29. an adjusting block; 30. perforating; 31. an electromagnetic suction plate; 32. a lead-in notch; 33. a storage bin; 34. a dust extraction fan; 35. a material guide cavity channel; 36. a sewage draining outlet.
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. 1-5, the present invention provides a technical solution: a die height adjusting device for a punch press for double-control three-jaw puller production and processing comprises die height adjusting equipment for a three-jaw puller punch press, wherein the die height adjusting equipment for the three-jaw puller punch press comprises a machine base 1, a transverse pushing mechanism, a stamping die, a multi-stage die height adjusting mechanism and a scrap processing mechanism, the left end of the machine base 1 is connected with the transverse pushing mechanism in a sliding mode, a supporting plate 2 is fixed at the right end of the machine base 1, the transverse pushing mechanism comprises a vertical plate 3 vertically supported and a hydraulic cylinder I4 fixed at the top of the vertical plate 3, a guide groove 5 is formed in the middle of the machine base 1, a sliding block 6 is arranged in the guide groove 5 in a sliding mode, a screw 7 is inserted into a thread of the sliding block 6, a driving motor 8 is arranged at the outer end of the screw 7, the driving motor 8 is arranged on the supporting plate 2, the power output end of the driving motor 8 is connected with the end of the screw 7, a transverse plate I9 is arranged at the power output end of the hydraulic cylinder I4, two groups of guide rods I10 are symmetrically inserted into two ends of the transverse plate I9, install pneumatic cylinder two 11 on backup pad 2, diaphragm two 12 and guide bar two 13 are installed to the outer end and the both sides of pneumatic cylinder two 11, stamping die is including upper die base 14 and the die holder 15 that the cooperation was used, it installs on horizontal pushing mechanism to go up the mould group, die holder 15 installs on backup pad 2, multistage mould height adjustment mechanism includes one-level adjuster 16, second grade adjuster 17 and tertiary adjuster 18, one-level adjuster 16 installs in the both ends of diaphragm one 9, second grade adjuster 17 installs in the junction of upper die base 14 and diaphragm, tertiary adjuster 18 installs on last module, crushed aggregates processing agency installs on frame 1.
In embodiment 2, as shown in fig. 1, the technical solution of this embodiment is an upper die holder 14 installed on the die height adjusting apparatus for the three-jaw puller punch press, the upper die holder 14 is a two-section structure and includes a main block 19 and a punch bottom plate 20 located below the main block 19, four sets of orientation rods 21 are uniformly inserted into the periphery of the main block 19, and the lower ends of the orientation rods 21 are connected to the periphery of the punch bottom plate 20.
Embodiment 4, as shown in fig. 3, the technical solution of this embodiment is a secondary regulator 17 installed on the die height adjusting apparatus for the three-jaw puller punch press, the secondary regulator 17 includes a pressing plate 25 installed on the first transverse plate 9 in an inclined manner and pressing rollers 26 located at two ends of the pressing plate 25, lower ends of the pressing plate 25 and the pressing rollers 26 are in contact with the adjusting roller 23, and the purpose of longitudinally adjusting the upper die base 14 can be achieved through the pressing plate 25 and the pressing rollers 26.
In embodiment 5, as shown in fig. 4, the technical solution of this embodiment is a three-stage adjuster 18 installed on the die height adjusting apparatus for the three-jaw puller punch press, where the three-stage adjuster 18 includes a servo motor 27 installed on the first transverse plate 9 and a lead screw 28 installed at a power output end of the servo motor 27, an adjusting block 29 is embedded on the lead screw 28, the adjusting block 29 is fixed to one side of the punch base plate 20, the lead screw 28 is driven by the servo motor 27 to move longitudinally, and the punch base plate 20 is driven to perform longitudinal adjustment during the movement.
The middle part of the adjusting block 29 is provided with a through opening 30, two groups of electromagnetic suction plates 31 are symmetrically arranged inside the through opening 30, the electromagnetic suction plates 31 are in contact with the lead screw 28, and the purpose of adsorption, limiting and fixing of the lead screw 28 can be achieved through the magnetic suction plates 31.
Specifically, two groups of material guide cavity channels 35 are symmetrically installed on the upper surface of the storage box 33, the heights of the two ends of the two groups of material guide cavity channels 35 are lower than the height of the middle part, and two groups of sewage outlets 36 are symmetrically formed in the two ends of the material guide cavity channels 35.
When in use: the invention designs a die height adjusting device for a punch press, which is specially used for double-control three-jaw puller production and processing, and mainly comprises a machine base 1, a transverse pushing mechanism, a stamping die, a multi-stage die height adjusting mechanism and a scrap processing mechanism, wherein one side of the base is provided with the transverse pushing mechanism in a sliding way, the other side of the base is provided with a supporting plate 2, an upper die base 14 is driven by the transverse pushing mechanism to move transversely and is matched with a lower die base 15 arranged on the supporting plate 2 for stamping processing, the stamping die is provided with the multi-stage die height adjusting mechanism, the multi-stage die height adjusting mechanism comprises a first-stage adjuster 16, a second-stage adjuster 17 and a third-stage adjuster 18, the upper die base 14 is driven by the first-stage adjuster 16 to carry out longitudinal large-amplitude adjustment, the upper die base 14 is longitudinally small-amplitude adjustment by the second-stage adjuster 17, and the bottom plate structure of the upper die base 14 is longitudinally adjusted by the third-stage adjuster 18, thereby realize carrying out multistage regulation to upper die base 14 to realize the nimble regulation of die height, can carry out the adjustment of adaptability according to the specification that the three-jaw of needs punching press draws the horse in actual operation process, easy operation convenient to use.
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 (8)
1. The utility model provides a die height adjusting device for punch press that is used for two accuse three-jaw draws horse to produce and process, includes three-jaw draws horse die height adjusting equipment for the punch press, its characterized in that: the die height adjusting equipment for the three-jaw puller punch comprises a base (1), a transverse pushing mechanism, a stamping die, a multistage die height adjusting mechanism and a scrap processing mechanism, wherein the left end of the base (1) is connected with the transverse pushing mechanism in a sliding manner, the right end of the base is fixed with a supporting plate (2), the transverse pushing mechanism comprises a vertical plate (3) which is vertically supported and a hydraulic cylinder I (4) which is fixed at the top of the vertical plate (3), the middle part of the base (1) is provided with a guide groove (5), a sliding block (6) is arranged in the guide groove (5) in a sliding manner, a screw rod (7) is inserted into a thread of the sliding block (6), the outer end of the screw rod (7) is provided with a driving motor (8), the driving motor (8) is arranged on the supporting plate (2), the power output end of the driving motor is connected with the end part of the screw rod (7), and the power output end of the hydraulic cylinder I (4) is provided with a transverse plate I (9), two groups of first guide rods (10) are symmetrically inserted into two ends of the first transverse plate (9), a second hydraulic cylinder (11) is installed on the support plate (2), a transverse plate II (12) and a guide rod II (13) are arranged at the outer end and two sides of the hydraulic cylinder II (11), the stamping die comprises an upper die holder (14) and a lower die holder (15) which are matched, the upper die set is arranged on the transverse pushing mechanism, the lower die holder (15) is arranged on the supporting plate (2), the multistage die height adjusting mechanism comprises a primary adjuster (16), a secondary adjuster (17) and a tertiary adjuster (18), the primary regulator (16) is arranged at two ends of the transverse plate I (9), the secondary regulator (17) is arranged at the joint of the upper die holder (14) and the transverse plate, the three-stage regulator (18) is arranged on the upper module, and the crushed aggregate processing mechanism is arranged on the machine base (1).
2. The die height adjusting device for the punch press used for the double-control three-jaw puller production and processing according to claim 1, is characterized in that: the upper die holder (14) is of a two-section structure and comprises a main block (19) and a stamping bottom plate (20) located below the main block (19), four groups of directional rods (21) are uniformly inserted into the periphery of the main block (19), and the lower ends of the directional rods (21) are connected with the periphery of the stamping bottom plate (20).
3. The die height adjusting device for the punch press used for the double-control three-jaw puller production and processing according to claim 1, is characterized in that: one-level adjuster (16) comprise electric putter (22), dancer rools (23) and connecting plate (24), electric putter (22) divide to be equipped with two sets ofly and the symmetry installs in the both ends of diaphragm (9), the power take off end of electric putter (22) is connected with the tip of dancer rools (23), dancer rools (23) are rotated with connecting plate (24) and are connected, the outer end of connecting plate (24) is rotated with the tip of diaphragm (9) and is connected.
4. The die height adjusting device for the punch press used for the double-control three-jaw puller production and processing according to claim 3, wherein: the two-stage regulator (17) comprises a pressing plate (25) which is obliquely arranged on the transverse plate I (9) and pressing rollers (26) which are positioned at two ends of the pressing plate (25), and the lower ends of the pressing plate (25) and the pressing rollers (26) are in contact with the adjusting roller (23).
5. The die height adjusting device for the punch press used for the double-control three-jaw puller production and processing according to claim 4, wherein: the three-stage adjuster (18) comprises a servo motor (27) arranged on the transverse plate I (9) and a lead screw (28) arranged at the power output end of the servo motor (27), an adjusting block (29) is embedded in the upper portion of the lead screw (28), and the adjusting block (29) is fixed on one side of the stamping bottom plate (20).
6. The die height adjusting device for the punch press used for the double-control three-jaw puller production and processing according to claim 5, wherein: a penetrating opening (30) is formed in the middle of the adjusting block (29), two groups of electromagnetic suction plates (31) are symmetrically arranged inside the penetrating opening (30), and the electromagnetic suction plates (31) are in contact with the screw rod (28).
7. The die height adjusting device for the punch press used for the double-control three-jaw puller production and processing according to claim 1, is characterized in that: crushed aggregates processing agency including evenly set up a plurality of leading-in notch of group (32) on frame (1) and be fixed in the storage of frame (1) bottom and receive case (33), the outside of storing up and receiving case (33) is provided with dust exhaust fan (34).
8. The die height adjusting device for the punch press used for the double-control three-jaw puller production and processing according to claim 7, wherein: two sets of guide chamber ways (35) are installed to the upper surface symmetry of storage case (33), and are two sets of the both ends height that guide chamber way (35) is less than the middle part height, two sets of drain (36) have been seted up to the both ends symmetry of guide chamber way (35).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111217049.9A CN114029400A (en) | 2021-10-19 | 2021-10-19 | Die height adjusting device for punch press for double-control three-jaw puller production and machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111217049.9A CN114029400A (en) | 2021-10-19 | 2021-10-19 | Die height adjusting device for punch press for double-control three-jaw puller production and machining |
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| Publication Number | Publication Date |
|---|---|
| CN114029400A true CN114029400A (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111217049.9A Pending CN114029400A (en) | 2021-10-19 | 2021-10-19 | Die height adjusting device for punch press for double-control three-jaw puller production and machining |
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| CN (1) | CN114029400A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109332465A (en) * | 2018-11-16 | 2019-02-15 | 泉州智驰自动化机械有限公司 | A kind of efficient press machine of auto parts and components processing |
| CN109604428A (en) * | 2018-12-12 | 2019-04-12 | 襄阳龙思达智控技术有限公司 | A kind of full-automatic mould changing device of NC turret punch machine |
| CN213352289U (en) * | 2020-07-24 | 2021-06-04 | 徐州双虎金属工具制造有限公司 | High-strength beam sliding two-jaw puller |
| CN213381319U (en) * | 2020-07-24 | 2021-06-08 | 徐州双虎金属工具制造有限公司 | Adjustable double-hole three-jaw puller device |
| CN213671520U (en) * | 2020-11-04 | 2021-07-13 | 内蒙古诚钢管道科技有限公司 | High-pressure-resistance spiral steel pipe blank joint roller device |
-
2021
- 2021-10-19 CN CN202111217049.9A patent/CN114029400A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109332465A (en) * | 2018-11-16 | 2019-02-15 | 泉州智驰自动化机械有限公司 | A kind of efficient press machine of auto parts and components processing |
| CN109604428A (en) * | 2018-12-12 | 2019-04-12 | 襄阳龙思达智控技术有限公司 | A kind of full-automatic mould changing device of NC turret punch machine |
| CN213352289U (en) * | 2020-07-24 | 2021-06-04 | 徐州双虎金属工具制造有限公司 | High-strength beam sliding two-jaw puller |
| CN213381319U (en) * | 2020-07-24 | 2021-06-08 | 徐州双虎金属工具制造有限公司 | Adjustable double-hole three-jaw puller device |
| CN213671520U (en) * | 2020-11-04 | 2021-07-13 | 内蒙古诚钢管道科技有限公司 | High-pressure-resistance spiral steel pipe blank joint roller device |
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Application publication date: 20220211 |