CN111940622A - Fan pivot dynamic balance axle correcting unit - Google Patents

Fan pivot dynamic balance axle correcting unit Download PDF

Info

Publication number
CN111940622A
CN111940622A CN202010910884.XA CN202010910884A CN111940622A CN 111940622 A CN111940622 A CN 111940622A CN 202010910884 A CN202010910884 A CN 202010910884A CN 111940622 A CN111940622 A CN 111940622A
Authority
CN
China
Prior art keywords
correcting
dynamic balance
plate
driving
rotating shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010910884.XA
Other languages
Chinese (zh)
Inventor
牛余会
丘朝庆
曹凤娟
于雪娇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANDONG SANNIU MACHINERY CO Ltd
Original Assignee
SHANDONG SANNIU MACHINERY CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANDONG SANNIU MACHINERY CO Ltd filed Critical SHANDONG SANNIU MACHINERY CO Ltd
Priority to CN202010910884.XA priority Critical patent/CN111940622A/en
Publication of CN111940622A publication Critical patent/CN111940622A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00Feeding, 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
    • B21D43/003Positioning devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/10Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts between rams and anvils or abutments

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a fan rotating shaft dynamic balance shaft correcting device which comprises a correcting top plate, a driving bin body and a detecting plate, wherein a fixing bolt penetrates through the correcting top plate, an inner attaching plate is sleeved on the inner wall of the correcting top plate, a connecting side pile is connected to the right end face of the correcting top plate, an electric push rod is installed on the right side of the connecting side pile, a supporting main body is installed on the right side of the electric push rod, the driving bin body is installed on the side surface of the supporting main body, a driving motor is installed on the inner wall of the driving bin body, and the detecting plate is installed below the electric push rod. This fan pivot dynamic balance axle correcting unit can real-time detection correct the dynamic balance axis body after accomplishing, can acquire the dynamic balance axis body after accomplishing of correction whether still have crooked condition, improves the correction quality of whole device, utilizes the driving-disc to make the dynamic balance axis body autogiration when correcting, and then realizes correcting the circumference extrusion of dynamic balance axis body, replaces artificial rotation, improves extrusion correction efficiency.

Description

Fan pivot dynamic balance axle correcting unit
Technical Field
The invention relates to the technical field of rotating shaft correction, in particular to a fan rotating shaft dynamic balance shaft correcting device.
Background
The fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of the input mechanical energy, is a short form of gas compression and gas conveying machine in China, and generally comprises a ventilator, a blower and a wind driven generator, wherein the fan mainly comprises blades, a rotating shaft, a motor and a frame.
At present, the pivot takes place the bending and needs mechanical to press when correcting and correct, owing to adopt columniform pivot, is comparatively complicated during the correction, and the artifical extrusion angle of adjusting occupies great manpower, makes whole correction efficiency slower moreover, corrects the quality that can't guarantee after accomplishing in addition, for this reason, we provide a fan pivot dynamic balance axle correcting unit.
Disclosure of Invention
The invention aims to provide a fan rotating shaft dynamic balance shaft correcting device, which solves the problems that the traditional rotating shaft needs mechanical pressure correction when being bent for correction, the correction is complicated due to the adoption of a cylindrical rotating shaft, the manual adjustment of an extrusion angle occupies large manpower, the whole correction efficiency is slow, and the correction quality cannot be ensured after the correction is finished.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a fan pivot dynamic balance axle correcting unit, is including correcting the roof, the drive storehouse body and pick-up plate, it has fixing bolt to run through in the inside of correcting the roof, and corrects the inner wall of roof and cup jointed the laminating inner panel, the right-hand member face of correcting the roof is connected with the connection side stake, and connects the right side of side stake and install electric putter, electric putter's right side is installed and is supported the main part, the drive storehouse body is installed in the side surface that supports the main part, and the inner wall of the drive storehouse body installs driving motor, the pick-up plate is installed in electric putter's below, and the inner wall of pick-up plate.
Preferably, a correction main plate is fixed on the side end face of the attached inner plate, and a dynamic balance shaft body is arranged below the correction main plate.
Preferably, laminating inner panel constitutes detachable construction through cup jointing with the side opening of correcting the roof, and corrects the inside through-thread hole of roof, correct the mainboard and be the design of U type with the laminating inner panel.
Preferably, a correcting bottom plate is attached to the lower portion of the dynamic balance shaft body, and a bearing support plate is arranged on the left side of the correcting bottom plate.
Preferably, the bearing supporting plate is U-shaped in appearance structure, the bottom end face of the bearing supporting plate and the upper end face of the correcting bottom plate are located on the same horizontal direction, and the right end face of the correcting bottom plate is fixedly connected with the supporting main body.
Preferably, driving motor's output is connected with the driving-disc, and the driven plate is installed in the left side of driving-disc, the inner wall of driving-disc is fixed with small-size push rod, and the preceding terminal surface of small-size push rod installs the connection frame pole, the drive roller is installed to the inner wall of connection frame pole.
Preferably, the driving disc is engaged with the driven disc, a telescopic structure is formed between the small push rods and the connecting frame rods and between the small push rods and the driving roller, and 3 groups of the small push rods and the connecting frame rods are circumferentially distributed about the central point of the driven disc.
Preferably, the outer surface of the driving roller is attached with an attaching outer layer, and a connecting side plate is fixed to the side surface of the detection plate.
Preferably, the shape structure of the detection plate is arc-shaped, and the infrared distance meters are arranged on the inner wall of the detection plate at intervals.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can adjust the application type according to the size and the diameter of the rotating shaft, can replace the correction main boards of different styles, has stronger correction application capability, and can correct and check the corrected rotating shaft by being provided with correction detection equipment;
2. the correcting main boards with different radians can be replaced according to the dynamic balance shafts with different sizes and radiuses, the correcting application range of the device is improved, fixing of the positions of the attached inner plates is achieved through the penetrating fixing bolts, the correcting main boards are designed in an up-down symmetrical mode, correcting efficiency is high, and mounting difficulty is low;
3. the dynamic balance shaft body to be corrected is supported by the bearing support plate and the correcting bottom plate, so that the operation is simple, the automatic teaching process of the rotating shaft with a certain bending radian is realized, and the labor is greatly saved;
4. the infrared distance measuring instruments with the built-in spacing distribution can detect the dynamic balance shaft body after the correction is finished in real time, can acquire whether the dynamic balance shaft body after the correction is finished is still bent or not, and improves the correction quality of the whole device;
5. the dynamic balance shaft body can automatically rotate during correction, so that circumferential extrusion correction of the dynamic balance shaft body is realized, manual rotation is replaced, the extrusion correction efficiency is improved, and meanwhile, the driving rollers of three groups of internal motors which are distributed in a triangular mode are used for driving the dynamic balance shaft body to move forward, so that the automatic capacity is high.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic side view of the driving bin of the present invention;
FIG. 3 is a schematic side view of the detection plate of the present invention;
FIG. 4 is a schematic side view of the structure of the inner plate of the present invention;
FIG. 5 is a schematic side view of a carrier plate according to the present invention.
In the figure: 1. correcting the top plate; 2. fixing the bolt; 3. attaching an inner plate; 4. correcting the main board; 5. connecting side piles; 6. an electric push rod; 7. a support body; 8. driving the bin body; 9. a drive motor; 10. a drive disc; 11. a driven plate; 12. a small push rod; 13. connecting the frame rod; 14. a drive roller; 15. attaching the outer layer; 16. a dynamic balance shaft body; 17. straightening the bottom plate; 18. detecting a plate; 19. an infrared range finder; 20. connecting the side plates; 21. a load bearing plate.
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, a fan rotating shaft dynamic balance shaft correcting device comprises a correcting top plate 1, a driving cabin 8 and a detecting plate 18, wherein a fixing bolt 2 penetrates through the inside of the correcting top plate 1, an inner wall of the correcting top plate 1 is sleeved with an attaching inner plate 3, a connecting side pile 5 is connected to the right end face of the correcting top plate 1, an electric push rod 6 is installed on the right side of the connecting side pile 5, a supporting main body 7 is installed on the right side of the electric push rod 6, the driving cabin 8 is installed on the side surface of the supporting main body 7, a driving motor 9 is installed on the inner wall of the driving cabin 8, the detecting plate 18 is installed below the electric push rod 6, and an infrared distance meter 19 is installed on the inner wall of the detecting plate 18, the correcting device can adjust the application type according to the rotating shaft with the size and the diameter, can replace correcting main boards 4 with different types, the rotating shaft after correction can be corrected and checked, and the quality after correction is further improved.
The side end face of the attached inner plate 3 is fixedly provided with a correction main plate 4, a dynamic balance shaft body 16 is arranged below the correction main plate 4, the attached inner plate 3 and a side opening of the correction top plate 1 are sleeved to form a detachable structure, a threaded hole is penetrated in the correction top plate 1, and the correction main plate 4 and the attached inner plate 3 are in a U-shaped design;
the correcting bottom plate 17 is attached to the lower portion of the dynamic balance shaft body 16, the bearing supporting plate 21 is arranged on the left side of the correcting bottom plate 17, the bearing supporting plate 21 is U-shaped in appearance structure, the bottom end face of the bearing supporting plate 21 and the upper end face of the correcting bottom plate 17 are located on the same horizontal direction, and the right end face of the correcting bottom plate 17 is fixedly connected with the supporting main body 7.
The output end of a driving motor 9 is connected with a driving disc 10, a driven disc 11 is installed on the left side of the driving disc 10, a small push rod 12 is fixed on the inner wall of the driving disc 10, a connecting frame rod 13 is installed on the front end face of the small push rod 12, a driving roller 14 is installed on the inner wall of the connecting frame rod 13, the driving disc 10 is meshed with the driven disc 11, a telescopic structure is formed among the small push rod 12, the connecting frame rod 13 and the driving roller 14, and 3 groups of small push rods 12 and connecting frame rods 13 are circumferentially distributed about the central point of the driven disc 11.
According to the invention, the outer surface of the driving roller 14 is attached with the attaching outer layer 15, the side surface of the detection plate 18 is fixed with the connecting side plate 20, the shape structure of the detection plate 18 is arc-shaped, and the infrared distance measuring instruments 19 are positioned on the inner wall of the detection plate 18 at intervals.
The working principle is as follows: for the correction device, firstly, the device is externally connected with a power supply, then the front end of a dynamic balance shaft body 16 needing to be corrected is placed on the inner side of a small push rod 12 with a U-shaped design, then a correction main board 4 with a corresponding size radian is adopted according to the size and the radius of the dynamic balance shaft body 16, a joint inner board 3 fixedly connected with the upper end face of the correction main board 4 is sleeved in an opening on the side end face of a correction top board 1, the correction main board 4 is installed on the lower end face of the correction top board 1, then the position of the correction main board 4 is fixed by penetrating a threaded hole through a fixing bolt 2, and the correction main board 4 at the bottom of the dynamic balance shaft body 16 is installed above a correction bottom board 17 by the same installation method;
then, an electric push rod 6 can be started, the electric push rod 6 is utilized to drive the two groups of connecting side piles 5 to move downwards, so that the correcting top plate 1 fixedly connected with the side end faces of the connecting side piles 5 moves downwards, the two groups of correcting main plates 4 which are designed in an up-and-down symmetrical mode are utilized to clamp and correct a curved dynamic balance shaft body 16, after one round is repeated, the front end face of the dynamic balance shaft body 16 is plugged into the inner hole of the driving cabin body 8, the three groups of small push rods 12 are utilized to drive the connecting frame rods 13 to move inwards, and therefore the driving rollers 14 which are distributed in a triangular mode are attached to the surface of the dynamic;
simultaneously driving motor 9 makes driving-disc 10 rotatory, and then make driven plate 11 rotatory of being connected with the meshing of driving-disc 10, make the dynamic balance axis body 16 take place rotatoryly, then electric putter 6 promotes once more that connect the side stake 5 is certain downwards, extrude and correct another part angle of dynamic balance axis body 16, after repeating all correct once with the circumference of dynamic balance axis body 16 and can utilize the outer 15 rotation of laminating outer 15 built-in motor drive laminating, automatic dragging dynamic balance axis body 16 moves to the right, be located the infrared distance meter 19 detection dynamic balance axis body 16 of the inside arc distribution of pick-up plate 18 simultaneously, when detecting the interval great, the dynamic balance axis body 16 that explains this position is not corrected the completion, can the secondary correct.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides a fan pivot dynamic balance axle correcting unit, is including correcting roof (1), drive storehouse body (8) and pick-up plate (18), its characterized in that: fixing bolt (2) have been run through to the inside of correcting roof (1), and the inner wall of correcting roof (1) has cup jointed laminating inner panel (3), the right-hand member face of correcting roof (1) is connected with connects side stake (5), and connects the right side of side stake (5) and install electric putter (6), support main part (7) are installed on the right side of electric putter (6), the drive storehouse body (8) are installed in the side surface that supports main part (7), and the inner wall of the drive storehouse body (8) installs driving motor (9), install in the below of electric putter (6) pick-up plate (18), and infrared distance meter (19) are installed to the inner wall of pick-up plate (18).
2. The fan rotating shaft dynamic balance shaft correcting device according to claim 1, characterized in that: the side end face of the attached inner plate (3) is fixed with a correction main plate (4), and a dynamic balance shaft body (16) is arranged below the correction main plate (4).
3. The fan rotating shaft dynamic balance shaft correcting device according to claim 2, characterized in that: laminating inner panel (3) and the side trompil of correcting roof (1) constitute detachable construction through cup jointing, and correct the inside through-thread hole of roof (1), correct mainboard (4) and laminating inner panel (3) and be the design of U type.
4. The fan rotating shaft dynamic balance shaft correcting device according to claim 2, characterized in that: the lower part of the dynamic balance shaft body (16) is attached with a correcting bottom plate (17), and a bearing support plate (21) is arranged on the left side of the correcting bottom plate (17).
5. The fan rotating shaft dynamic balance shaft correcting device according to claim 4, characterized in that: the bearing support plate (21) is U-shaped in appearance structure, the bottom end face of the bearing support plate (21) and the upper end face of the correcting bottom plate (17) are located on the same horizontal direction, and the right end face of the correcting bottom plate (17) is fixedly connected with the supporting main body (7).
6. The fan rotating shaft dynamic balance shaft correcting device according to claim 1, characterized in that: the output of driving motor (9) is connected with driving-disc (10), and driven plate (11) are installed in the left side of driving-disc (10), the inner wall of driving-disc (10) is fixed with small-size push rod (12), and the preceding terminal surface of small-size push rod (12) installs connection frame pole (13), drive roller (14) are installed to the inner wall of connection frame pole (13).
7. The fan rotating shaft dynamic balance shaft correcting device according to claim 4, characterized in that: the driving disc (10) is meshed with the driven disc (11), a telescopic structure is formed among the small push rods (12), the connecting frame rods (13) and the driving roller (14), and 3 groups of the small push rods (12) and the connecting frame rods (13) are distributed on the circumference of the center point of the driven disc (11).
8. The fan rotating shaft dynamic balance shaft correcting device according to claim 6, characterized in that: the outer surface of the driving roller (14) is attached with an attaching outer layer (15), and a connecting side plate (20) is fixed on the side surface of the detection plate (18).
9. The fan rotating shaft dynamic balance shaft correcting device according to claim 8, characterized in that: the shape structure of the detection plate (18) is arc-shaped, and the infrared distance meters (19) are arranged on the inner wall of the detection plate (18) at intervals.
CN202010910884.XA 2020-09-02 2020-09-02 Fan pivot dynamic balance axle correcting unit Pending CN111940622A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010910884.XA CN111940622A (en) 2020-09-02 2020-09-02 Fan pivot dynamic balance axle correcting unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010910884.XA CN111940622A (en) 2020-09-02 2020-09-02 Fan pivot dynamic balance axle correcting unit

Publications (1)

Publication Number Publication Date
CN111940622A true CN111940622A (en) 2020-11-17

Family

ID=73368008

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010910884.XA Pending CN111940622A (en) 2020-09-02 2020-09-02 Fan pivot dynamic balance axle correcting unit

Country Status (1)

Country Link
CN (1) CN111940622A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116241758A (en) * 2022-12-15 2023-06-09 宜昌东阳建设工程有限公司 Infrared intelligent monitoring alarm device for building site
CN117244997A (en) * 2023-11-16 2023-12-19 山西富兴通重型环锻件有限公司 Flange punching device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08300043A (en) * 1995-05-10 1996-11-19 Hitachi Ltd Strain straightening method of long size material and device therefor
CN205798229U (en) * 2016-07-10 2016-12-14 哈尔滨理工大学 Full-automatic fin pipe production line
CN109290459A (en) * 2018-10-09 2019-02-01 虞家俨 A kind of Pipe necking machine machine mouth regulating device
CN209531764U (en) * 2018-12-25 2019-10-25 南京东升冶金机械有限公司 Can multi-faceted straightening long shaft straightener
CN111389984A (en) * 2020-03-30 2020-07-10 大同新成新材料股份有限公司 Two-side radian calibrator for intelligent pantograph carbon slide plate and use method thereof
CN211304305U (en) * 2019-12-26 2020-08-21 郑州工业应用技术学院 Roll shaft straightening device for machining
CN213052441U (en) * 2020-09-02 2021-04-27 山东三牛机械集团股份有限公司 Fan pivot dynamic balance axle correcting unit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08300043A (en) * 1995-05-10 1996-11-19 Hitachi Ltd Strain straightening method of long size material and device therefor
CN205798229U (en) * 2016-07-10 2016-12-14 哈尔滨理工大学 Full-automatic fin pipe production line
CN109290459A (en) * 2018-10-09 2019-02-01 虞家俨 A kind of Pipe necking machine machine mouth regulating device
CN209531764U (en) * 2018-12-25 2019-10-25 南京东升冶金机械有限公司 Can multi-faceted straightening long shaft straightener
CN211304305U (en) * 2019-12-26 2020-08-21 郑州工业应用技术学院 Roll shaft straightening device for machining
CN111389984A (en) * 2020-03-30 2020-07-10 大同新成新材料股份有限公司 Two-side radian calibrator for intelligent pantograph carbon slide plate and use method thereof
CN213052441U (en) * 2020-09-02 2021-04-27 山东三牛机械集团股份有限公司 Fan pivot dynamic balance axle correcting unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116241758A (en) * 2022-12-15 2023-06-09 宜昌东阳建设工程有限公司 Infrared intelligent monitoring alarm device for building site
CN116241758B (en) * 2022-12-15 2024-05-03 宜昌东阳建设工程有限公司 Infrared intelligent monitoring alarm device for building site
CN117244997A (en) * 2023-11-16 2023-12-19 山西富兴通重型环锻件有限公司 Flange punching device
CN117244997B (en) * 2023-11-16 2024-01-30 山西富兴通重型环锻件有限公司 Flange punching device

Similar Documents

Publication Publication Date Title
CN111940622A (en) Fan pivot dynamic balance axle correcting unit
KR101027793B1 (en) The solar tracking apparatus for a sunlight power generator
CN213052441U (en) Fan pivot dynamic balance axle correcting unit
CN104325275A (en) Dust collector motor press fitting device and dust collector motor press fitting method
CN209562472U (en) A kind of alternating expression photovoltaic bracket convenient for adjusting angle
CN208560916U (en) Automatic charging device
CN207440628U (en) A kind of photovoltaic module erecting device of new belt supporting frame
CN102627246B (en) Multifunctional three-dimensional-rotating aerial work platform
CN214616868U (en) Wind wheel device and wind generating set
CN204123053U (en) Motor of dust collector press-loading apparatus
CN210306492U (en) Front and back face overturning welding frame device for motor tricycle frame
CN206164458U (en) Novel biax photovoltaic tracking system
CN212842646U (en) Drying device is used in wheat tea production
CN216912669U (en) Aerogenerator pivot welding set
CN216853299U (en) Solar irrigation device for farmland
CN212810555U (en) Outdoor antenna with reinforced bottom supporting structure
CN215670943U (en) Lifting construction platform
CN216649555U (en) Wind-solar-storage combined power generation system control device
CN214701309U (en) Front support structure of solar support
CN216044172U (en) Wind power water diversion device
CN219834042U (en) Unilateral electrodeless regulation tripod structure of photovoltaic
CN214276420U (en) Environmental protection sample drying device
CN214868458U (en) Shape correcting device for elliptical circular ring workpiece
KR101548628B1 (en) Apparatus of vertical axis windmill for wind turbine
CN210321651U (en) Wind power generation blade detection device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination