WO2018036091A1 - Tige de vis à pas variable à profondeur variable, procédé de forgeage à finition immédiate de rainures de vis associé, et dispositif de forgeage associé - Google Patents

Tige de vis à pas variable à profondeur variable, procédé de forgeage à finition immédiate de rainures de vis associé, et dispositif de forgeage associé Download PDF

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Publication number
WO2018036091A1
WO2018036091A1 PCT/CN2017/070939 CN2017070939W WO2018036091A1 WO 2018036091 A1 WO2018036091 A1 WO 2018036091A1 CN 2017070939 W CN2017070939 W CN 2017070939W WO 2018036091 A1 WO2018036091 A1 WO 2018036091A1
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WO
WIPO (PCT)
Prior art keywords
forging
screw
forging die
die
spiral
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PCT/CN2017/070939
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English (en)
Chinese (zh)
Inventor
张连华
张晖
马海军
Original Assignee
中聚信海洋工程装备有限公司
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Application filed by 中聚信海洋工程装备有限公司 filed Critical 中聚信海洋工程装备有限公司
Publication of WO2018036091A1 publication Critical patent/WO2018036091A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/02—Dies or mountings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/56—Making machine elements screw-threaded elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws

Definitions

  • the invention relates to a screw and a manufacturing method thereof, in particular to a screw and a net shape forging a screw groove and a forging device thereof, which are continuously changing pitch and groove depth, and belongs to the technical field of forging type.
  • Screw is an indispensable part of mechanical equipment. It is generally a screw with equal depth and equidistant groove. It is widely used.
  • the drive screw used on the machine tool is used to push the components such as the carriage along the machine track, and some of them are used in the mechanical transmission of the machine tool. These applications are very successful and very effective.
  • plastic extruders because of the use of isometric deep-screw screws as extrusion rods, often form holes or bubbles in plastic products, resulting in products becoming Product. After exploration and research, it is proved that the screw with the variable depth variable pitch groove can be used as the extrusion rod to effectively solve the above problems.
  • the conventional method for making the screw with variable depth and variable pitch groove is very complicated.
  • the second is the screw that cuts the groove, destroys the structure of the continuous fiber on the surface of the blank, and forces the looser material at the center.
  • the utilization rate of the material is very low, and more waste is generated. 6.
  • the material performance of the core portion of the screw shaft is poor.
  • the traditional plastic machine screw cutting processing form does not meet the modern "least energy consumption, the least displacement, the highest material utilization rate, the highest production efficiency, the shortest process flow, the shortest delivery time, the best product quality, production
  • the lowest cost green forging concept Therefore, designing a screw that deepens the variable pitch groove and a method of making the continuous blank of the original blank on the surface of the screw are urgent problems to be solved.
  • the object of the present invention is to provide a deep-distance variable pitch screw and a net shape forging groove thereof, and a forging device, which aims to improve the screw strength, increase the toughness and wear resistance of the screw by the method, and utilize the forging type. Achieve no cutting, subversive changes in traditional production methods.
  • a deep-depth variable pitch screw comprising: a thread, a groove, the surface of the thread and the groove being continuous A metal fiber having a surface formed by a squeeze flow.
  • the number of spiral grooves on the screw is N, and the N grooves are sequentially divided into X gradient steps from the first end to the second end of the screw, and each step includes one or more groove grooves.
  • the spiral groove depth, the spiral groove width and the helix angle of the groove of the step near the second end are respectively larger than the spiral groove depth and the spiral groove width of the groove of the step near the first end.
  • the helix angle, where N, X is greater than or equal to 2.
  • the helix angles of the N slots vary uniformly with the gradient steps; or, the helix angles of the N slots vary randomly with the gradient steps.
  • the spiral groove depth, the spiral groove width, and the helix angle of each of the slots in the same step are equal, and the large diameter of the screw is a predetermined value D.
  • the present invention provides a forging device for preparing a variable pitch variable pitch screw, the screw comprising: a screw, a screw groove, and the number of spiral grooves on the screw is N, from the first end of the screw to The second end divides the N slots into X gradient steps, each step includes one or more slots, and the spiral groove depth of the slot of the step adjacent to the second end of any two adjacent steps
  • the difference of the spiral groove depth of the groove of the step near the first end is a predetermined groove depth difference
  • the difference of the spiral groove width of the groove of the step near the second end and the groove of the step near the first end is predetermined
  • the difference in groove width, the difference between the helix angle of the groove of the step near the second end and the helix angle of the groove of the step near the first end is a predetermined angle difference, wherein N, X is greater than or equal to 2, the screw
  • the large diameter is a predetermined value D
  • the forging device comprises X step forging dies, wherein each
  • the forging device further comprises a forging press and a guiding die sleeve, each step forging die being separately mountable in the guiding die sleeve, the upper forging die and the lower forging die center in the same step forging die
  • the spiral protrusions on the section are offset from each other by 180° along the spiral angle of the pitch, and the forging press presses the upper forging die and the lower forging die located in the guiding die sleeve through the hammer head, and forging is located at the upper forging die and A screw blank between the lower forging dies.
  • the present invention provides a deep variable pitch snail using a forging device
  • the method of the rod the screw comprises: a screw thread, a screw groove, the number of spiral grooves on the screw is N, and the N screw grooves are sequentially divided into X gradient steps from the first end to the second end of the screw, each step Including one or more groove grooves, wherein the spiral groove depth, the spiral groove width and the helix angle of the groove of the step adjacent to the second end of any two adjacent steps are respectively larger than the groove of the step adjacent to the first end a spiral groove depth, a spiral groove width and a helix angle, wherein N, X is greater than or equal to 2, the large diameter of the screw is a predetermined value D, and the forging device comprises X step forging dies, wherein each step forging die corresponds to a step of the screw, each step forging die comprises an upper forging die and a lower forging die, and the upper forging die and the lower forging die in each step forging
  • the method comprises: installing an upper forging die and a lower forging die in a first step forging die in a guiding die sleeve of a forging device, and placing a screw blank heated to a forging temperature on the upper forging die that is mutually engaged And the lower forging die, the first step of forging the screw blank to make N screw grooves on the screw blank; installing the upper forging die and the lower forging die in the second step forging die In the guiding die sleeve of the forging device, the first stage forged screw blank is placed between the upper forging die and the lower forging die which are engaged with each other, and all the grooves from the second step are subjected to the first Two-stage forging; and so on, the upper forging die and the lower forging die in the X-th step forging die are installed in the guiding die sleeve of the forging device, and the screw blanks after the forging of the (X-1) stage are placed on each other.
  • the X-stage forging is
  • the screw blank when forging the screw blank at each stage, the screw blank needs to be forged multiple times, after the end of one forging, the screw blank is rotated by a predetermined angle, and the screw blank moves along the axis. A function of the pitch, and then the next forging, and finally forging all the grooves that need to be forged.
  • any step forging die installed in the guiding die sleeve has spiral projections on the central section of the upper forging die and the lower forging die offset from each other by 180° along the spiral angle of the pitch, and A spring is disposed between the forging die and the lower forging die.
  • the beneficial contribution of the invention is that the screw groove is made of forging, the material of the screw surface is better, the continuity of the material of the surface of the slab is kept and the structure is tight, and the material with good mechanical properties is distributed throughout the whole.
  • the surface of the screw and the net shape forging of the screw groove do not require cutting, so the various properties of the screw are well optimized, and the service life is also greatly improved, because the screw is maintained on the basis of the original precision for a long time. Therefore, it is used in a plastic machine to make the produced material superior and the product performance better.
  • Figure 1 is a front view showing the structure of a deep variable pitch screw of the present invention
  • Figure 2 is a front view showing the structure of the forging device of the present invention.
  • Figure 3 is a cross-sectional structural view of the A-A section of Figure 2;
  • Figure 4 is a cross-sectional structural view showing a section B-B of Figure 2;
  • Figure 5 is a schematic left side view of Figure 2;
  • Figure 6 is a view showing the working state of the forged first step screw groove of the present invention.
  • Figure 7 is a view showing the working state of the forged second step screw groove of the present invention.
  • Figure 8 is a view showing the working state of the forged X-th step screw groove of the present invention.
  • variable pitch screw 1 includes a thread 101 and a groove 102, and the surfaces of the thread 101 and the groove 102 are pushed by the hammer 3 on the liquid forging machine 2.
  • the forging die 5 and the lower forging die 6 are pressed to form a continuous metal fiber.
  • the spiral groove number of the variable pitch screw 1 of the present invention is N, and the N screw grooves are sequentially divided into X gradient steps from the first end to the second end of the screw 1, and each step includes one or more screw grooves.
  • the spiral groove depth, the spiral groove width, and the helix angle of each of the grooves in the same step are equal.
  • the spiral groove depth, the spiral groove width and the helix angle of the step near the second end are respectively larger than the spiral groove depth, the spiral groove width and the helix angle of the step near the first end, wherein N , X is greater than or equal to 2.
  • each step includes one or more grooved grooves, and the difference between the spiral groove depth of the groove of the step near the second end and the groove depth of the groove of the step near the first end of any two adjacent steps
  • the value is the predetermined groove depth difference, close to the second end
  • the difference between the spiral groove width of the stepped groove and the groove of the step near the first end is a predetermined groove width difference, the spiral angle of the groove of the step near the second end and the groove of the step near the first end
  • the difference in the helix angle is the predetermined angle difference.
  • the helix angle of the N grooves varies uniformly with the gradual steps. In another embodiment, the helix angles of the N slots vary randomly with the gradient steps.
  • the gradation amount is ⁇ h 2 (set value), the groove width gradation amount is the elongation ⁇ l 2 after forging of a single spiral groove in the first step; and so on, the X step is relative to the X-1 step
  • the groove depth gradient amount is ⁇ h X (set value), and the groove width gradient amount is the elongation amount ⁇ l X after forging of a single spiral groove in the X-1 step.
  • the helix angle is ⁇ 2 ( ⁇ 2 > ⁇ 1 ).
  • the helix angle is ⁇ X ( ⁇ X > ⁇ X-1 ).
  • FIG. 2 is a schematic front view of the forging device of the present invention, which can be used to forge the deep-depth variable pitch screw 1 of the present invention.
  • the forging apparatus shown in Fig. 2 includes a hydraulic machine 2, a guide sleeve 4, an anvil 7, and X step forging dies (not labeled).
  • each step of the screw 1 is provided with a step forging die, and each step forging die is composed of an upper forging die 5 and a lower forging die 6.
  • the upper forging die 5 and the lower forging die 6 in each step forging die are respectively formed with spiral convex shapes 501, 601 having the same spiral rising angle and the same groove width in the axial center plane of the screw, and each step forging
  • the upper forging die 5 and the lower forging die 6 in the die are also uniformly provided with an inner cylindrical arc surface having a screw diameter D.
  • Each step forging die can be separately installed in the guiding die sleeve 4, and any step forging die installed in the guiding die sleeve 4, the spiral protrusions on the central section of the upper forging die 5 and the lower forging die 6 are in the inner edge of the pitch The spiral angles are offset from each other by 180°, and a spring is disposed between the upper forging die 5 and the lower forging die 6.
  • the guide bushing 4 is fixed to the anvil 7 below the hammer head 3 of the hydraulic machine 2.
  • the hydraulic press 2 presses the upper forging die 5 and the lower forging die 6 located in the guide die sleeve 4 by the hammer head 3 to forge the screw blank located between the upper die die 5 and the lower die die 6.
  • the shape of the spiral bulge on the upper forging die 5 and the lower forging die 6 in each step forging die, the spiral groove depth, the spiral groove width and the helix angle of the groove in the step corresponding to the step forging die Based on the settings. That is, the spiral groove depth, the spiral groove width and the helix angle of the groove in the gradient step of the screw corresponding to each step forging die are set as the spiral forging on the upper forging die and the lower forging die in the step forging die shape.
  • the spiral forging shapes 501 and 601 of the upper forging die 5 and the lower forging cross 6 in the first step forging die are formed at the spiral groove depth h 1 , the spiral groove width l 1 , and the helix angle ⁇ 1 are set values.
  • variable depth pitch screw using the forging device shown in FIG. 5 will be specifically described based on FIGS. 6, 7, and 8.
  • the method of the present invention for manufacturing a variable depth pitch screw comprises the following steps.
  • Step 1 As shown in FIG. 6, the upper forging die 5 and the lower forging die 6 in the first step forging die are mounted in the guiding die sleeve 4, and the guiding die sleeve 4 is fixed on the anvil 7 below the hammerhead 3. , the screw blank is heated to the forging temperature.
  • a spring 8 is provided between the upper forging die 5 and the lower forging die 6, and the spiral forging shapes 501 and 601 on the central section of the upper forging die 5 and the lower forging die 6 are offset from each other by 180° in the pitch.
  • the rules for installing other step forging dies in the guiding dies 4 are the same, and therefore will not be described below.
  • Step 2 placing a screw blank heated to the forging temperature between the upper forging die 5 and the lower forging die 6, and performing the first forging on the screw blank to obtain N pieces on the screw blank Screw groove.
  • Step 3 As shown in Fig. 7, the upper forging die 5 and the lower forging die 6 of the second step forging die are mounted in the guiding die sleeve 4, and the guiding die sleeve 4 is fixed to the anvil 7 below the hammerhead 3.
  • Step 4 placing the first forged spiral blank between the upper forging die 5 and the lower forging die 6, and performing a second forging on all the grooves from the second step.
  • the upper forging die 5 and the lower forging in the X-step forging die The mold 6 is installed in the guide die sleeve 4 of the forging device; the first (X-1) forged screw blank is placed between the upper forging die 5 and the lower forging die 6 for the step from the Xth step For all the grooves, the Xth forging is performed.
  • the present invention provides a step forging die for each step of the variable pitch variable pitch screw 1, and each step forging die can be separately installed in the guiding die sleeve 4.
  • the first step forging die can be first installed in the guiding die sleeve 4, and the screw blank is forged for the first time to make N screw grooves on the screw blank, thereby forming a deep variable pitch screw.
  • the second step forging die is installed in the guiding die sleeve 4, and the second forging is performed on all the grooves on the spiral blank after the first forging from the second step, thereby forming a deepening change.
  • variable depth groove on the screw of the invention is forged, and the material of the screw surface is better, the continuity of the material of the surface of the slab is kept and the structure is tight, and the material with good mechanical properties is distributed throughout the screw.
  • the surface of the groove and the net shape forging do not require cutting, so the various properties of the screw are well optimized, and the service life is also greatly improved, because the screw is kept on the basis of the original accuracy for a long time. Therefore, it is used in a plastic machine to make the produced material excellent and the product performance is better.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

La présente invention concerne une tige de vis à pas variable à profondeur variable (1), un procédé de forgeage à finition immédiate de rainures de vis (102) associé, et un dispositif de forgeage associé. La vis à pas variable à profondeur variable (1) comprend des filets de vis (101) et des rainures de vis (102), et les surfaces des filets de vis (101) et des rainures de vis (102) sont soumises à un flux de compression à l'aide d'une machine de forgeage hydraulique (2) pour former des fibres métalliques continues. Le procédé de forgeage à finition immédiate de rainures de vis (102) comprend : le montage d'une filière de forgeage supérieure (5) et d'une filière de forgeage inférieure (6) dans une première étape forgeant une filière dans un manchon de filière guide (4) d'un dispositif de forgeage et de compression, et la conduite d'un premier stade de forgeage et de compression sur une ébauche de tige de vis ; le montage d'une filière de forgeage supérieure (5) et d'une filière de forgeage inférieure (6) dans une seconde étape de forgeage de filière dans un manchon de filière guide (4), et la conduite du second stade de forgeage et de compression sur toutes les rainures de vis (102) en commençant à partir de la seconde étape ; et de manière similaire, le montage d'une filière de forgeage supérieure (5) et d'une filière de forgeage inférieure (6) dans une filière de forgeage de la Xième étape dans un manchon de filière guide (4), et l'exécution du Xième stade de forgeage et de compression sur toutes les rainures de vis (102) en commençant à partir de la Xième étape. Les rainures de vis (102) sont formées par forgeage, de sorte que la continuité des fibres de matière sur la surface d'une ébauche de coulée peut être maintenue, et la structure est compacte ; en outre, aucun usinage de découpe n'est nécessaire pour le forgeage à finition immédiate, et diverses performances de la tige de vis peuvent être bien optimisées.
PCT/CN2017/070939 2016-08-22 2017-01-12 Tige de vis à pas variable à profondeur variable, procédé de forgeage à finition immédiate de rainures de vis associé, et dispositif de forgeage associé WO2018036091A1 (fr)

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CN201610696544.5 2016-08-22
CN201610696544.5A CN106313478B (zh) 2016-08-22 2016-08-22 一种变深变距螺杆及其净形锻制螺槽的工艺方法

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Cited By (1)

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CN110479868A (zh) * 2019-09-24 2019-11-22 大冶威普换热器有限公司 一种用于连续加工螺旋散热片的模具

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Publication number Priority date Publication date Assignee Title
CN106313478B (zh) * 2016-08-22 2018-11-30 中聚信海洋工程装备有限公司 一种变深变距螺杆及其净形锻制螺槽的工艺方法

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CN106313478A (zh) * 2016-08-22 2017-01-11 中聚信海洋工程装备有限公司 一种变深变距螺杆及其净形锻制螺槽的工艺

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CN1116942C (zh) * 1999-11-17 2003-08-06 常熟市千斤顶厂 以热轧圆钢冷挤压无切削成形的调整螺杆加工方法
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CN102284659A (zh) * 2011-08-23 2011-12-21 山东理工大学 锻压件的数控成形方法
CN103978147A (zh) * 2014-05-21 2014-08-13 西安交通大学 一种径向锻造渐进增量成形大齿高螺纹件的方法
CN106313478A (zh) * 2016-08-22 2017-01-11 中聚信海洋工程装备有限公司 一种变深变距螺杆及其净形锻制螺槽的工艺

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Publication number Priority date Publication date Assignee Title
CN110479868A (zh) * 2019-09-24 2019-11-22 大冶威普换热器有限公司 一种用于连续加工螺旋散热片的模具

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