CN113916279B - Axial rolling force and rolling piece rotating speed measuring device for cross wedge rolling forming - Google Patents

Axial rolling force and rolling piece rotating speed measuring device for cross wedge rolling forming Download PDF

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Publication number
CN113916279B
CN113916279B CN202111005009.8A CN202111005009A CN113916279B CN 113916279 B CN113916279 B CN 113916279B CN 202111005009 A CN202111005009 A CN 202111005009A CN 113916279 B CN113916279 B CN 113916279B
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rolling
blank
axial
measuring
transmission shaft
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CN113916279A (en
Inventor
王宝雨
王佳鹏
刘晋平
周靖
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University of Science and Technology Beijing USTB
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University of Science and Technology Beijing USTB
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/08—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-force
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/12—Rolling load or rolling pressure; roll force
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The invention relates to the technical field of metal plastic forming technology and equipment, and provides a device for measuring axial rolling force and rolling piece rotating speed of cross wedge rolling forming, which comprises a die, a blank, a guide plate and a measuring unit; the mould is a half wedge mould; the measuring unit is used for measuring the axial rolling force and the rotating speed of the blank in the rolling process in real time; the guide plate is used for supporting and guiding blanks in the rolling process; one end of the measuring unit is provided with a connecting sleeve, and the measuring unit is coaxially connected with the blank through the connecting sleeve; the measuring unit is integrally and fixedly arranged on the rolling mill stand. The invention has simple and compact structure, low manufacturing cost, convenient use and high measuring precision, can measure the axial rolling force and the rotating speed change condition of a rolled piece in the cross wedge rolling forming process in real time, has important significance for further researching the cross wedge rolling forming movement and the force energy parameter measurement, can verify the correctness of the finite element simulation result of the cross wedge rolling forming, and has wide application prospect.

Description

Axial rolling force and rolling piece rotating speed measuring device for cross wedge rolling forming
Technical Field
The invention relates to the technical field of metal plastic forming technology and equipment, in particular to a device for measuring axial rolling force and rolling piece rotating speed of cross wedge rolling forming.
Background
Cross wedge rolling is a new technology for forming shaft parts without cutting or with less cutting, and belongs to advanced near net forming manufacturing technology. Because of the advantages of high production efficiency, high material utilization rate, good product quality and the like, various countries in the world adopt a cross wedge rolling process to produce shaft parts, blanks and the like. The cross wedge rolling technology is widely applied to the fields of aviation, automobiles, railways and the like at present, and good economic benefits are obtained.
With the wide application of the cross wedge rolling technology, the continuous perfection and the deep research of the cross wedge rolling theory become very important. In the current stage, the research on the cross wedge rolling theory is mostly remained in the finite element numerical simulation research stage, and the lack of accurate experimental data verifies the accuracy of the finite element analysis result, so that the deep research on the cross wedge rolling theory becomes very difficult.
Disclosure of Invention
The invention aims to at least overcome one of the defects in the prior art, provides a device for measuring axial rolling force and rolling piece rotating speed of cross wedge rolling, solves the problem that the axial rolling force change condition and rolling piece rotating speed change condition of a rolling piece in the conventional cross wedge rolling process cannot be accurately measured, and has important significance for researching in-depth research on cross wedge rolling theory such as metal flow rules, rolling radius change condition and the like in the cross wedge rolling process.
The invention adopts the following technical scheme:
the device for measuring axial rolling force and rolling piece rotating speed of cross wedge rolling forming comprises a die, a blank, a guide plate and a measuring unit;
the die is a half wedge die, is obtained by cutting a complete cross wedge rolling die along a central symmetry plane, and avoids the mutual offset of axial forces born by a rolled piece in the cross wedge rolling forming process;
the measuring unit is used for measuring the axial rolling force and the rotating speed of the blank in the rolling process in real time;
the guide plate is used for supporting and guiding the blank in the rolling process;
the measuring unit comprises a connecting sleeve and is arranged at one end of the connecting sleeve, and the measuring unit is coaxially connected with the blank through the connecting sleeve; the measuring unit is integrally and fixedly arranged on the rolling mill stand.
In any of the possible implementations described above, there is further provided an implementation, the measurement unit includes a housing, a connection sleeve, a transmission shaft, an axial pressure sensor, and an optoelectronic encoder;
one end of the connecting sleeve is connected with the blank, and the other end of the connecting sleeve is connected with the transmission shaft; the blank, the connecting sleeve and the transmission shaft synchronously rotate under the rolling action of the die;
the axial pressure sensor is arranged on the transmission shaft and is used for measuring the axial tension applied to the transmission shaft;
the photoelectric encoder is coaxially connected with the transmission shaft and is used for measuring the rotating speed of the transmission shaft;
the transmission shaft and the axial pressure sensor are both arranged in the shell, and the shell is fixed on the rolling mill stand.
In any of the possible implementations described above, there is further provided an implementation in which one end of the billet is a cylinder that receives the rolling force, the other end is a connecting head, and the cylinder and the connecting head are integrally connected by a connecting rod.
In any of the possible implementations described above, there is further provided an implementation, the connecting sleeve includes a first end connected to the blank, and a second end connected to the drive shaft;
the first end adopts a semi-closed structure, and is provided with a non-circular cross section through hole matched with the connector part of the blank and a semicircular groove matched with the connecting rod of the blank;
the second end is provided with a waist round hole matched with the transmission shaft, and the transmission shaft penetrates through the waist round hole and is fixedly connected with the second end through bolts.
In any of the possible implementations described above, there is further provided an implementation in which the cross section of the connecting head is a non-circular cross section.
In any of the possible implementations described above, there is further provided an implementation in which the non-circular cross section is rectangular, square, or regular polygon with a number of sides greater than four.
In any of the possible implementations described above, there is further provided an implementation manner, wherein one end of the housing is provided with a bottom plate, the other end of the housing is provided with a fixed end cover, a slotted hole is provided in the bottom plate (so that the measuring unit is conveniently mounted on the rolling mill stand), and the housing is fixedly connected with the rolling mill stand through the bottom plate and the fixed end cover.
In any of the possible implementations described above, there is further provided an implementation in which the connection sleeve has a thermal insulation layer or is thermally insulated and heat resistant.
In any one of the possible implementation manners described above, there is further provided an implementation manner, wherein the inner ring of the axial pressure sensor is connected with a shaft shoulder arranged on the transmission shaft, and the outer ring is coaxially connected with the inner step of the sleeve.
The beneficial effects of the invention are as follows: the invention has simple and compact structure, low manufacturing cost, convenient use and high measuring precision, can measure the axial rolling force and the rotating speed change condition of a rolled piece in the cross wedge rolling forming process in real time, has important significance for further researching the cross wedge rolling forming movement and the force energy parameter measurement, can verify the correctness of the finite element simulation result of the cross wedge rolling forming, and has wide application prospect.
Drawings
Fig. 1 is a schematic structural diagram of a device for measuring axial rolling force and rolling piece rotation speed in cross wedge rolling forming according to an embodiment of the invention.
Fig. 2 is a schematic diagram of the structure of a measuring unit in the embodiment.
FIG. 3 is a schematic diagram showing the structure of the mold in the embodiment.
Fig. 4 shows a schematic diagram of a blank structure in an embodiment.
Fig. 5 is a schematic view of the structure of the connecting sleeve in the embodiment.
Fig. 6 is a schematic view of a housing structure in an embodiment.
FIG. 7 is a diagram showing a comparison of a complete mold and a half wedge mold; a is a traditional complete mould, and B is a half wedge mould in the embodiment of the invention.
In the figure: 1. a mold; 2. blank material; 3. a guide plate; 4. a rolling mill stand; 5. a connecting sleeve; 6. fixing the end cover; 7. a transmission shaft; 8. an axial pressure sensor; 9. a housing; 10. a cover is closed; 11. a photoelectric encoder; A. a die (half wedge); B. (blank) connecting head; C. (blank) connecting rods; D. a connecting sleeve non-circular cross-section through hole; E. a semicircular groove of the connecting sleeve; F. a waist round hole of the connecting sleeve; G. a housing floor.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be regarded as being isolated, and they may be combined with each other to achieve a better technical effect. In the drawings of the embodiments described below, like reference numerals appearing in the various drawings represent like features or components and are applicable to the various embodiments.
As shown in fig. 1, the axial rolling force and the rotating speed of a rolled piece in cross wedge rolling forming are measured in real time by adopting a measuring unit, so that the real-time measurement of parameters of the rolled piece in cross wedge rolling forming is realized.
The device comprises a die 1, a blank 2, a guide plate 3 and a measuring unit. The measuring unit is fixedly connected with the rolling mill stand 4 through threads; the projecting end of the measuring unit is coaxially connected to the blank 2.
The mold 1 of the present invention is a half wedge mold, as shown in fig. 7, in comparison with a conventional complete mold pair. The traditional cross wedge rolling belongs to symmetrical rolling, the left axial force and the right axial force of a rolled piece are mutually offset, and the specific axial force cannot be measured. The axial force during rolling can be measured by adopting the half wedge die.
As shown in fig. 2-6, in a preferred embodiment, the measuring unit comprises a connecting sleeve 5, a fixed end cap 6, a drive shaft 7, an axial pressure sensor 8, a housing 9, a cover 10, a photoelectric encoder 11; a half wedge structure A arranged on the die 1; a connecting head B and a connecting rod C arranged on the blank 2; a non-circular cross section through hole D, a semicircular groove E and a kidney-shaped hole F which are arranged on the connecting sleeve 5; a bottom plate G provided on the housing 9; the connecting head B of the blank 2 corresponds to the non-circular cross section through hole D of the connecting sleeve 5, and the connecting rod C of the blank 2 corresponds to the semicircular groove E of the connecting sleeve 5, so that the axial rolling force and the rotary motion of the blank in the rolling process are transmitted; the extending end of the transmission shaft 7 corresponds to the kidney-shaped hole F of the connecting sleeve 5 and is locked through the bolt to prevent loosening.
For the purpose of fixing the measuring unit, the measuring unit is provided with a shell 9 and a fixed end cover 6, as shown in fig. 1, the shell 9 is provided with a bottom plate G, and the bottom plate G of the shell 9 is fixedly connected with the outer side of the rolling mill stand 4 through bolts; the fixed end cover 6 is fixedly connected with the inner side of the rolling mill stand 4 through bolts and provides an intermediate support, so that the fixed firmness of the measuring unit is ensured (the fixed place of the integral measuring device and the stand is mainly provided with two places, one place is the bottom plate of the shell 9, see figure 6, and the other place is the fixed end cover 6, because the integral structure is that the axial distance between the measuring device, the blank and the mould is longer, the fixed end cover 6 is only fixed with the stand by the bottom plate of the shell 9, the fixed end cover is unstable, and an intermediate support is needed, and the fixed end cover 6 is fixedly connected with the stand to play the roles of intermediate support and stability).
The cover 10 is mounted on the end of the housing 9 (the end of the base plate G) and serves to compress the inner bearing and mount the photoelectric encoder 11. The photoelectric encoder 11 is fixed on the blank cap 10, and the shell of the photoelectric encoder 11 is fixed with the blank cap 10; the optical axis of the photoelectric encoder 11 is inserted into the inside of the transmission shaft 7, and the optical axis rotates as the transmission shaft 7 rotates to transmit the instantaneous rotation speed.
It should be noted that the installation mode of the measuring unit is not only the only one of the above embodiments, but also various installation modes in the prior art, so as to achieve the purpose of installing and fixing the measuring unit.
Preferably, as shown in fig. 5, a through hole D with a non-circular cross section is formed at the connecting end of the connecting sleeve 5 and the blank 2, so as to synchronously transmit the rotation motion of the blank to the transmission shaft 7; the connecting sleeve 5 and the connecting section of the blank 2 are processed into a semicircular groove E, are in contact fit with the end face of the connecting head part B of the blank 2, and synchronously transmit the axial rolling force in the rolling process.
Preferably, clearance fit is arranged between the transmission shaft 7 and the inner ring of the axial pressure sensor 8 and between the outer ring of the axial pressure sensor 8 and the inner ring of the shell 9, so that inaccurate measurement results caused by overlarge friction force are avoided.
The working principle of the embodiment of the invention is as follows:
the blank 2 is subjected to axial rolling force under the wedge cross rolling forming action of the die 1 and rotates along with the die 1; the blank 2 transmits axial rolling force and rotary motion applied to the blank 2 to a transmission shaft 7 through a connecting sleeve 5; the transmission shaft 7 transmits axial rolling force to the axial pressure sensor 8 through a shaft shoulder, and transmits rotary motion to the photoelectric encoder 11 which is rigidly connected with the transmission shaft, so that the change condition of the axial rolling force and the rotating speed of a rolled piece in the cross wedge rolling forming process can be measured in real time.
Although a few embodiments of the present invention have been described herein, those skilled in the art will appreciate that changes can be made to the embodiments herein without departing from the spirit of the invention. The above-described embodiments are exemplary only, and should not be taken as limiting the scope of the claims herein.

Claims (6)

1. The device for measuring the axial rolling force and the rolling piece rotating speed of the cross wedge rolling forming is characterized by comprising a die, a blank, a guide plate and a measuring unit;
the die is a half wedge die and is obtained by cutting along a central symmetry plane by using a complete wedge cross rolling die;
the measuring unit is used for measuring the axial rolling force and the rotating speed of the blank in the rolling process in real time;
the guide plate is used for supporting and guiding the blank in the rolling process;
the measuring unit comprises a connecting sleeve and is arranged at one end of the connecting sleeve, and the measuring unit is coaxially connected with the blank through the connecting sleeve; the whole measuring unit is fixedly arranged on the rolling mill stand;
the measuring unit further comprises a shell, a transmission shaft, an axial pressure sensor and a photoelectric encoder;
one end of the connecting sleeve is connected with the blank, and the other end of the connecting sleeve is connected with the transmission shaft; the blank, the connecting sleeve and the transmission shaft synchronously rotate under the rolling action of the die;
the axial pressure sensor is arranged on the transmission shaft and is used for measuring the axial tension applied to the transmission shaft; the transmission shaft transmits the axial rolling force to the axial pressure sensor through the shaft shoulder;
the photoelectric encoder is coaxially connected with the transmission shaft and is used for measuring the rotating speed of the transmission shaft;
the transmission shaft and the axial pressure sensor are arranged in the shell, and the shell is fixed on the rolling mill stand;
one end of the blank is a cylinder bearing rolling acting force, the other end of the blank is a connecting head, and the cylinder and the connecting head are connected into a whole through a connecting rod;
the connecting sleeve comprises a first end connected with the blank and a second end connected with the transmission shaft;
the first end adopts a semi-closed structure, and is provided with a non-circular cross section through hole matched with the connector part of the blank and a semicircular groove matched with the connecting rod of the blank;
the second end is provided with a waist round hole matched with the transmission shaft, and the transmission shaft penetrates through the waist round hole and is fixedly connected with the second end through bolts.
2. The cross wedge rolling axial rolling force and rolling piece rotating speed measuring device according to claim 1, wherein the cross section of the connecting head part is a non-circular cross section.
3. The device for measuring axial rolling force and rolling speed of cross wedge rolling according to claim 2, wherein the non-circular cross section is rectangular, square or regular polygon with sides greater than four.
4. The device for measuring axial rolling force and rolling member rotating speed of cross wedge rolling forming according to claim 1, wherein one end of the shell is provided with a bottom plate, the other end is provided with a fixed end cover, a slotted hole is arranged on the bottom plate, and the shell is fixedly connected with the rolling mill frame through the bottom plate and the fixed end cover.
5. The cross wedge rolling axial rolling force and rolling piece rotating speed measuring device according to claim 1, wherein the connecting sleeve is provided with a heat insulation layer or is subjected to heat insulation and heat resistance treatment.
6. The device for measuring axial rolling force and rolling member rotating speed of cross wedge rolling forming according to claim 1, wherein an inner ring of the axial pressure sensor is connected with a shaft shoulder arranged on the transmission shaft, and an outer ring of the axial pressure sensor is coaxially connected with the inner step of the sleeve.
CN202111005009.8A 2021-08-30 2021-08-30 Axial rolling force and rolling piece rotating speed measuring device for cross wedge rolling forming Active CN113916279B (en)

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CN202111005009.8A CN113916279B (en) 2021-08-30 2021-08-30 Axial rolling force and rolling piece rotating speed measuring device for cross wedge rolling forming

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CN202111005009.8A CN113916279B (en) 2021-08-30 2021-08-30 Axial rolling force and rolling piece rotating speed measuring device for cross wedge rolling forming

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CN113916279B true CN113916279B (en) 2023-04-21

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