CN111408661A - Extrusion forming process for stepped hole of jacking head seat of hydraulic jack - Google Patents
Extrusion forming process for stepped hole of jacking head seat of hydraulic jack Download PDFInfo
- Publication number
- CN111408661A CN111408661A CN202010283638.6A CN202010283638A CN111408661A CN 111408661 A CN111408661 A CN 111408661A CN 202010283638 A CN202010283638 A CN 202010283638A CN 111408661 A CN111408661 A CN 111408661A
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- punch
- hole
- extruding
- stepped hole
- extrusion
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Classifications
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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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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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
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
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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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
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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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/34—Perforating tools; Die holders
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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
- B21D37/01—Selection of materials
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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
- B21D37/18—Lubricating, e.g. lubricating tool and workpiece simultaneously
Abstract
The invention relates to an extrusion forming process of a stepped hole of a head seat of an oil jack, which comprises the following specific steps of S1, blanking a plate body to obtain a blank disc material, and reserving a central hole during blanking; s2, extruding and flanging, namely applying pressure to one end face of the blank disc material through a first punch of a 200T oil press for cold extrusion, and extruding the upper end of the blank disc material to obtain a flanging to obtain a first intermediate piece; s3, extruding the step holes, applying pressure to the end face, with the flanging, of the blank disc material through a second punch of the punch press for cold extrusion, wherein the diameter of the second punch is smaller than that of the first punch, and is larger than that of the central hole in the step S1, and the step holes are formed with the central hole to obtain a second intermediate piece; and S4, extruding the center hole, wherein the second punch and the third punch adopt a structure of coaxial mutual embedding, and the diameter of the third punch is larger than that of the center hole in the step S1. The invention has the following advantages: avoid the pore wall to generate stress concentration and ensure the structural strength of the top head seat.
Description
The technical field is as follows:
the invention belongs to the field of production of oil jacks, and particularly relates to an extrusion forming process of a stepped hole of a head seat of an oil jack.
Background art:
the hydraulic jack has one hydraulic cylinder to lift the product, one stepped hole in the head seat and connected to the base of the hydraulic jack. The prior oil jack head seat has the following technical defects during production:
1. the hot-press forming machine is adopted to carry out one-time hot-press forming on the stepped hole of the top head seat, however, in the hot-press forming process, a residual compressive stress layer is introduced into the hole wall, the hot-press process is easy to cause the internal structure of the top head seat to generate thermal stress, and the hole edge and the hole wall are easy to generate fatigue cracks and fatigue fracture, particularly the top head seat for the hydraulic jack has extremely high structural strength requirement, so the hot-press forming process cannot meet the structural strength of the top head seat;
2. adopt cold extrusion or hank to cut, the hank cuts the process and can cause the pore wall to take place elastoplastic deformation, and the pressure that needs during cold extrusion is great, produces very high temperature rise among the extrusion process, and the deformation resistance of the headstock by the extrusion is high, and calorific capacity is big, and the drift bears higher temperature, uses the life and the extrusion effect that influence the drift for a long time, and the centre bore position not only has the shrinkage cavity, and the tissue is thick moreover.
The invention content is as follows:
the invention aims to overcome the defects and provide an extrusion forming process of a stepped hole of a top head seat of an oil jack, so that stress concentration on the hole wall is avoided, and the structural strength of the top head seat is ensured.
The purpose of the invention is realized by the following technical scheme: an extrusion forming process of a stepped hole of a head seat of an oil jack comprises the following specific steps,
s1, blanking the plate body to obtain a blank disc material, wherein a central hole is reserved during blanking;
s2, extruding and flanging, namely applying pressure to one end face of a blank disc material through a first punch of a 200T oil press for cold extrusion, extruding the upper end of the blank disc material to obtain a flanging, and cleaning impurities and chips generated by extrusion from a central hole to obtain a first intermediate piece;
s3, extruding the step holes, applying pressure to the end face, with the flanging, of the blank disc material through a second punch of the punch press for cold extrusion, wherein the diameter of the second punch is smaller than that of the first punch, and is larger than that of the central hole in the step S1, and the step holes are formed with the central hole to obtain a second intermediate piece;
and S4, extruding the center hole, pressing the center of the second intermediate piece by a third punch of the punch press to perform cold extrusion, wherein the second punch and the third punch adopt a structure of coaxial mutual embedding, and the diameter of the third punch is larger than that of the center hole in the step S1, so that the punch seat with the step hole is obtained.
The invention is further improved in that: the punch press comprises a second punch and a third punch which are mutually embedded, and further comprises a machine frame, a connecting frame and a driving cylinder, wherein the connecting frame is fixedly connected with the machine frame, the driving cylinder is vertically arranged to penetrate through the connecting frame, the driving end of the driving cylinder is composed of an inner piston rod and an outer piston rod which are mutually embedded, the driving end of the inner piston rod is fixedly connected with the upper end face of the third punch, and the driving end of the outer piston rod is fixedly connected with the upper end face of the second punch.
The invention is further improved in that: the connecting frame is provided with a plurality of inclined nozzles which are uniformly distributed at positions above the second punch and are all inclined downwards towards the outer end face of the second punch.
The invention is further improved in that: and the time interval from the step hole extrusion of the second punch to the central hole extrusion of the third punch is 1s-2 s.
The invention is further improved in that: the spraying fluid of the inclined nozzle is cooling lubricating fluid.
The invention is further improved in that: a sensor is arranged on any one inclined nozzle, the upper end face of the second punch is higher than the sensor in an initial state, when the second punch falls down under the driving of an outer piston rod of a driving cylinder to start extruding a stepped hole, the sensor detects the second punch, the inclined nozzle sprays the outer end face of the second punch until the sensor cannot detect the second punch, at the moment, the inclined nozzle stops spraying, and cooling lubricating liquid extends downwards along with the second punch; and after the second punch presses the step hole, the second punch is kept still, the third punch continues to press the central hole along with the pushing of the inner piston rod, and the third punch and the second punch ascend to separate from the punch seat after the pressing stroke is finished.
The invention is further improved in that: the driving cylinder is a hydraulic cylinder.
The invention is further improved in that: the first punch, the second punch and the third punch are made of carburized steel 20 CrMnTi.
Compared with the prior art, the invention has the following advantages:
1. the central hole is reserved firstly, then the stepped hole is extruded by adopting the punch with double punches, the reservation of the central hole is convenient for discharging scraps and impurities generated in the extruding and flanging process, and the influence of the scraps and the impurities on the surface smoothness and the surface quality of the subsequent extruding stepped hole is avoided; in the process of extruding the step hole, the blank disc material of the ejector seat is pressed by the second punch, and the internal tissue moves towards the direction of the central hole, so that the inner diameter of the central hole is reduced, the tissue of the central hole is large, and the central hole is immediately extruded after the step hole is extruded, so that the technical defect is overcome, and the surface quality of the step hole of the ejector seat is improved.
2. The inclined nozzle is arranged to spray cooling lubricating liquid to the outer edge of the second punch, so that the extrusion step hole and the central hole are lubricated, the high-temperature phenomena of the punch and the hole wall caused by extrusion can be avoided, and the structural strength of the punch seat is improved.
Description of the drawings:
fig. 1 is a schematic structural diagram of a punch press for an extrusion molding process of a stepped hole of a head seat of an oil jack according to the present invention.
Fig. 2 is a schematic structural diagram of a processed head base of an extrusion molding process of a stepped hole of a head base of an oil jack according to the present invention.
Reference numbers in the figures:
1-center hole, 2-flanging, 3-step hole, 4-second punch, 5-third punch, 6-frame, 7-connecting frame, 8-inner piston rod, 9-outer piston rod, 10-inclined nozzle and 11-sensor.
The specific implementation mode is as follows:
for the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship, such as one based on the drawings, are used only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the structure or unit indicated must have a specific orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, and therefore the features defined "first" and "second" may explicitly or implicitly include one or more of the features described.
In the present invention, unless otherwise specified and limited, terms such as "connected," "provided," "having," and the like are to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, or directly connected, and may be connected through an intermediate medium, so that those skilled in the art can understand the basic meaning of the above terms in the present invention according to specific situations.
The invention relates to an implementation mode of an extrusion forming process of a stepped hole of a head seat of an oil jack, which comprises the following specific steps,
s1, blanking the plate body to obtain a blank disc material, wherein a central hole (1) is reserved during blanking;
s2, extruding and flanging, namely applying pressure to one end face of a blank disc material through a first punch of a 200T oil press for cold extrusion, extruding the upper end of the blank disc material to obtain a flanging 2, and cleaning impurities and chips generated by extrusion from a central hole 1 to obtain a first intermediate piece;
s3, extruding the step holes, applying pressure to the end face, with the turnup 2, of the blank disc material through a second punch 4 of the punch press to perform cold extrusion, wherein the diameter of the second punch 4 is smaller than that of the first punch, the diameter of the second punch 4 is larger than that of the central hole in the step S1, and the step holes 3 are formed with the central hole 1 to obtain a second intermediate piece;
and S4, extruding the center hole, pressing the center of the second intermediate piece by a third punch 5 of the punch press to perform cold extrusion, wherein the second punch 4 and the third punch 5 adopt a structure of coaxial mutual embedding, and the diameter of the third punch 5 is larger than that of the center hole 1 in the step S1, so that the punch seat with the step hole 3 is obtained.
Further, the punch press includes second drift 4 and third drift 5 of mutual gomphosis, still includes frame 6, link 7 and driving cylinder, link 7 and frame 6 fixed connection, the vertical through connection frame (7) setting of driving cylinder, the drive end of driving cylinder comprises interior piston rod 8 and outer piston rod 9 of mutual gomphosis, the drive end of interior piston rod 8 and the up end fixed connection of third drift 5, the drive end of outer piston rod 9 and the up end fixed connection of second drift 4.
Further, the connecting frame 7 is provided with a plurality of inclined nozzles 10, the inclined nozzles 10 are uniformly distributed at positions above the second punch 4, and the inclined nozzles 10 are inclined downwards towards the outer end face of the second punch 4.
Further, the time interval from the second punch 4 pressing the stepped hole 3 to the third punch 5 pressing the center hole 1 is 1s-2 s.
The center hole 1 is reserved firstly, then the step hole 3 is extruded by adopting a punch with double punches, the reservation of the center hole 1 is convenient for discharging scraps and impurities generated in the process of extruding and flanging 2, and the influence of the scraps and the impurities on the surface smoothness and the surface quality of the subsequent extrusion step hole 3 is avoided; in the process of extruding the stepped hole 3, the blank disc material of the ejector seat is pressed by the second punch 4, and the internal structure moves towards the direction of the central hole 1, so that the inner diameter of the central hole 1 is reduced, the structure of the central hole 1 is thick, and the central hole 1 is immediately extruded after the stepped hole is extruded, so that the technical defect is overcome, and the surface quality of the stepped hole of the ejector seat is improved.
Further, the spraying fluid of the inclined nozzle 10 is cooling lubricating fluid.
Further, a sensor 11 is arranged on any one of the inclined nozzles 10, the upper end face of the second punch 4 is higher than the sensor 11 in the initial state, when the second punch 4 falls down under the driving of the outer piston rod 9 of the driving cylinder to start extruding the stepped hole 3, the sensor 11 detects the second punch 4, the inclined nozzle 10 sprays the outer end face of the second punch 4 until the sensor 11 cannot detect the second punch 4, at the moment, the inclined nozzle 10 stops spraying, and the cooling lubricating liquid extends downwards along with the second punch 4; after the second punch 4 finishes extruding the stepped hole 3, the second punch 4 is kept still, the third punch 5 continues to punch the central hole 1 along with the pushing of the inner piston rod 8, and after the punching stroke is finished, the third punch 5 and the second punch 4 ascend to separate from the punch seat.
The inclined nozzle 10 is arranged to spray cooling lubricating liquid to the outer edge of the second punch 4, so that the extrusion step hole 3 and the central hole 1 are lubricated, the high-temperature phenomena of the punch and the hole wall caused by extrusion can be avoided, and the structural strength of the punch seat is improved. In the process of extruding the step hole 3, the generated scraps or impurities move to the position of the central hole 1, and the third punch 5 extrudes the central hole 1, so that the structural size of the central hole can be ensured, and the function of deburring, scraps or impurities is achieved.
Furthermore, the driving cylinder is a hydraulic cylinder, and the driving of the hydraulic cylinder is more stable.
Furthermore, the first punch, the second punch 4 and the third punch 5 are made of carburizing steel 20CrMnTi, the extrusion effect of the punches made of the materials is remarkable, and the service life and the structural strength of the punches can be guaranteed.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only for the purpose of illustrating the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides an extrusion forming technology in hydraulic jack headstock step hole which characterized in that: the method comprises the specific steps of,
s1, blanking the plate body to obtain a blank disc material, wherein a central hole (1) is reserved during blanking;
s2, extruding and flanging, namely applying pressure to one end face of a blank disc material through a first punch of a 200T oil press for cold extrusion, extruding the upper end of the blank disc material to obtain a flanging (2), and cleaning impurities and chips generated by extrusion from a central hole (1) to obtain a first intermediate piece;
s3, extruding the step holes, applying pressure to the end face, provided with the flanging (2), of the blank disc material through a second punch (4) of the punch press to perform cold extrusion, wherein the diameter of the second punch (4) is smaller than that of the first punch, the diameter of the second punch (4) is larger than that of the central hole in the step S1, and the step holes (3) are formed with the central hole (1) to obtain a second intermediate piece;
and S4, extruding the center hole, pressing the center of the second intermediate piece by a third punch (5) of the punch press to perform cold extrusion, wherein the second punch (4) and the third punch (5) adopt a structure of coaxial mutual embedding, and the diameter of the third punch (5) is larger than that of the center hole (1) in the step S1, so that the punch holder with the step hole (3) is obtained.
2. The extrusion molding process of the stepped hole of the head seat of the oil jack according to claim 1, characterized in that: the punch press includes second drift (4) and third drift (5) of mutual gomphosis, still includes frame (6), link (7) and actuating cylinder, link (7) and frame (6) fixed connection, the vertical through connection frame (7) setting of actuating cylinder, the drive end of actuating cylinder comprises interior piston rod (8) and outer piston rod (9) of mutual gomphosis, the drive end of interior piston rod (8) and the up end fixed connection of third drift (5), the drive end of outer piston rod (9) and the up end fixed connection of second drift (4).
3. The extrusion molding process of the stepped hole of the head seat of the oil jack according to claim 2, characterized in that: the connecting frame (7) is provided with a plurality of inclined nozzles (10), the inclined nozzles (10) are uniformly distributed at positions above the second punch (4), and the inclined nozzles (10) are inclined downwards towards the outer end face of the second punch (4).
4. The extrusion molding process of the stepped hole of the head seat of the oil jack according to claim 3, characterized in that: the time interval from the second punch (4) extruding the stepped hole (3) to the third punch (5) extruding the central hole (1) is 1-2 s.
5. The extrusion molding process of the stepped hole of the head seat of the oil jack according to claim 4, wherein: the spraying fluid of the inclined nozzle (10) is cooling lubricating liquid.
6. The extrusion molding process of the stepped hole of the head seat of the oil jack according to claim 5, wherein: a sensor (11) is arranged on any one inclined nozzle (10), the upper end face of the second punch (4) is higher than the sensor (11) in the initial state, when the second punch (4) falls down under the driving of an outer piston rod (9) of a driving cylinder to start extruding the stepped hole (3), the sensor (11) detects the second punch (4), the inclined nozzle (10) sprays the outer end face of the second punch (4) until the sensor (11) cannot detect the second punch (4), at the moment, the inclined nozzle (10) stops spraying, and cooling lubricating liquid extends downwards along with the second punch (4); after the second punch (4) finishes extruding the stepped hole (3), the second punch (4) is kept still, the third punch (5) continues to punch the central hole (1) along with the pushing of the inner piston rod (8), and after the punching stroke is finished, the third punch (5) and the second punch (4) rise to separate from the punch holder.
7. The extrusion molding process of the stepped hole of the head seat of the oil jack according to claim 6, wherein: the driving cylinder is a hydraulic cylinder.
8. The extrusion molding process of a stepped hole of a head base of an oil jack according to any one of claims 1 to 7, wherein: the first punch, the second punch (4) and the third punch (5) are made of carburized steel 20 CrMnTi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010283638.6A CN111408661B (en) | 2020-04-13 | 2020-04-13 | Extrusion forming process for stepped hole of jacking head seat of hydraulic jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010283638.6A CN111408661B (en) | 2020-04-13 | 2020-04-13 | Extrusion forming process for stepped hole of jacking head seat of hydraulic jack |
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| Publication Number | Publication Date |
|---|---|
| CN111408661A true CN111408661A (en) | 2020-07-14 |
| CN111408661B CN111408661B (en) | 2021-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010283638.6A Active CN111408661B (en) | 2020-04-13 | 2020-04-13 | Extrusion forming process for stepped hole of jacking head seat of hydraulic jack |
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| CN (1) | CN111408661B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112893644A (en) * | 2021-01-29 | 2021-06-04 | 无锡鹏德汽车配件有限公司 | Punch structure for fine punching and extruding composite forming of metal plate |
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| JPS53125960A (en) * | 1977-04-11 | 1978-11-02 | Komatsu Mfg Co Ltd | Forming method of material with stepped through hole |
| CN103495644A (en) * | 2013-08-26 | 2014-01-08 | 格林精密部件(苏州)有限公司 | Method and equipment for machining automobile steering pump motor shaft stepped hole |
| CN204093916U (en) * | 2014-07-22 | 2015-01-14 | 滁州市成业机械制造有限公司 | A kind of two plunger chip die |
| CN104550441A (en) * | 2014-12-17 | 2015-04-29 | 天津市津荣天宇精密机械有限公司 | Blanking forming technical method for processing step holes by adopting smooth feeding mold |
| CN106270137A (en) * | 2016-08-24 | 2017-01-04 | 新昌县宏宇制冷有限公司 | The aluminum ceiling board perforating press that a kind of cooling performance is good |
| CN206588225U (en) * | 2017-03-20 | 2017-10-27 | 安徽江淮汽车集团股份有限公司 | Stamping parts of automobile composite die |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53125960A (en) * | 1977-04-11 | 1978-11-02 | Komatsu Mfg Co Ltd | Forming method of material with stepped through hole |
| CN103495644A (en) * | 2013-08-26 | 2014-01-08 | 格林精密部件(苏州)有限公司 | Method and equipment for machining automobile steering pump motor shaft stepped hole |
| CN204093916U (en) * | 2014-07-22 | 2015-01-14 | 滁州市成业机械制造有限公司 | A kind of two plunger chip die |
| CN104550441A (en) * | 2014-12-17 | 2015-04-29 | 天津市津荣天宇精密机械有限公司 | Blanking forming technical method for processing step holes by adopting smooth feeding mold |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112893644A (en) * | 2021-01-29 | 2021-06-04 | 无锡鹏德汽车配件有限公司 | Punch structure for fine punching and extruding composite forming of metal plate |
| CN112893644B (en) * | 2021-01-29 | 2024-04-09 | 江苏鹏德工业科技有限公司 | Punch structure for metal plate fine punching extrusion composite forming |
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| CN111408661B (en) | 2021-07-16 |
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