A new energy automobile main reduction gear blank outer circle runout detection device

Abstract

The application discloses a kind of new energy automobile main reduction gear blank outer circle run-out detection device, including base, base is connected with vertical plate, vertical plate is connected with horizontal plate, horizontal plate is connected with lower limit seat, and the top of lower limit seat is connected with upper limit seat;Upper limit seat and lower limit seat are slidably fitted with upper center, and lower center is connected with upper center concentric on base, and upper center and lower center are detachably connected with mandrel;Horizontal plate bottom is connected with stop sleeve, and upper center can be inserted into stop sleeve;Upper center is connected with handle, handle extends to the outside of upper limit set, and horizontal plate is connected with locking mechanism for locking handle;Mandrel side base is connected with table frame, and dial gauge is connected to table frame.Compared with prior art, the application is convenient to disassemble and assemble when in use, and a single person can operate, reduce labor intensity, while ensuring the improvement of detection accuracy and efficiency, widely used in large disc type gear blank outer circle run-out detection.

Description

TECHNICAL FIELD

[0001] The application relates to a detection device for the outer circle runout of a gear blank of a main reduction gear of a new energy automobile. BACKGROUND

[0002] With the rapid development of the automobile industry, the types of automobile gear machining are increasing, and most of the disc gears are large-module and large-diameter, the net weight of the single piece of the gear is basically more than 5 kg, and the product outer diameter is greater than 200 mm. The detection of the end face and the radial runout in the precision detection of the gear blank before gear machining is an indispensable detection link. For small disc products, a taper mandrel and a runout instrument can be used to realize single-person operation, but for large disc gears, it is very inconvenient for a person to operate the runout instrument with one hand, and basically two persons are needed to assist each other to operate, the product runout detection frequency is low and the speed is slow.

[0003] With the increase of the types of similar products, a quick-change type convenient, simple and efficient runout detection device must be designed and manufactured to meet the production and use requirements. SUMMARY

[0004] The application aims to provide a detection device for the outer circle runout of a gear blank of a main reduction gear of a new energy automobile, which is convenient to disassemble and assemble, can be operated by a single person, reduces the labor intensity of employees, and ensures the improvement of detection accuracy and efficiency, so as to solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme:

[0006] A detection device for the outer circle runout of a gear blank of a main reduction gear of a new energy automobile, comprising a base, a vertical plate connected to the base, a horizontal plate connected to the vertical plate, a lower limit seat connected to the horizontal plate, and an upper limit seat connected to the top end of the lower limit seat; the upper limit seat and the lower limit seat are slidably connected with an upper center, the base is connected with a lower center concentric with the upper center, and the upper center and the lower center are detachably connected with a mandrel; the horizontal plate is connected with a blocking sleeve at the bottom, and the upper center can extend into the blocking sleeve; a handle is connected to the upper center, the handle extends to the outside of the upper limit sleeve, and a locking mechanism for locking the handle is connected to the horizontal plate; a table stand is connected to the base at the side of the mandrel, and a dial gauge is connected to the table stand.

[0007] In a further scheme of the application, a plurality of supporting corner columns are connected to the lower surface of the base, and the horizontal plate is connected to one side of the fixed end of the vertical plate; a mounting hole is vertically formed in the end of the horizontal plate away from the vertical plate, the lower limit seat is in interference fit with the mounting hole and is fixed to the horizontal plate, and a center through hole is arranged at the center of the lower limit seat; a two-stage stepped through hole concentric with the center through hole is arranged at the center of the upper limit seat, and the upper segment of the two-stage stepped through hole is smaller than the lower segment.

[0008] Further, the upper center is divided into three sections, the bottom end of the upper center is a center body, the middle is a slide column, and the top end is a slide rod; the center body is slidingly fitted in the center through hole, the slide column is slidingly fitted in the stepped through hole of the lower section, and the slide rod is slidingly fitted in the stepped through hole of the upper section; a first spring is sleeved on the outer wall of the slide rod inside the upper limit seat.

[0009] Further, one end of the handle is rotationally connected to the slide column, the side wall of the upper limit seat is provided with a notch penetrating the stepped through hole, and the handle is rotationally connected to the notch through a pin shaft.

[0010] Further, the locking mechanism includes a base plate connected to the cross plate; the base plate is provided with an upper slide hole and a lower slide hole arranged in parallel, a locking pin and a limiting pin are slidingly fitted in the upper slide hole and the lower slide hole respectively, and one end of the locking pin and the limiting pin away from the handle is connected with a baffle.

[0011] Further, the upper slide hole is a stepped hole, the locking pin includes a pin head, a pin rod and a pin tail; the pin rod is slidingly fitted in the large diameter section of the upper slide hole, and the outer wall of the pin tail in the stepped hole is sleeved with a second spring; the bottom of one end of the pin head is provided with an inclined wedge, and the handle is provided with a wedge groove matched with the wedge.

[0012] Further, the center of the limiting sleeve is provided with a containing hole concentric with the center through hole, and the side wall of the limiting sleeve is provided with an aperture penetrating the containing hole.

[0013] Further, the mandrel is of a liquid expansion structure, the outer wall of the mandrel is connected with a concentric disc, the upper side of the disc is connected with a concentric boss, the boss outer circular surface is connected with an expansion sleeve, and an oil cavity is arranged between the expansion sleeve and the boss; one end of the spool is provided with an oil channel, one end of the oil channel is threadedly fitted with a pressurizing screw, and the oil cavity is in communication with the oil channel; the outer wall of the mandrel is provided with anti-skid lines, and the upper and lower ends of the mandrel are provided with taper holes for centering.

[0014] Further, one end of the cross plate is threadedly fitted with a limiting screw, and the limiting screw can abut against the outer wall of the center body of the upper center.

[0015] A new energy automobile main reduction gear blank outer circle runout detection method uses the new energy automobile main reduction gear blank outer circle runout detection device, and the specific steps are as follows:

[0016] S1, gear blank clamping: the gear blank is sleeved on the outer wall of the circular table, and the web of the gear blank is clamped on the upper surface of the disc; the operator rotates the pressurizing screw clockwise by means of the inner hexagonal wrench, the hydraulic oil in the oil channel is extruded by the pressurizing screw, the hydraulic oil enters the oil cavity and is continuously compressed, the expansion sleeve is deformed by extrusion, and the inner wall of the center hole of the gear blank is expanded;

[0017] S2, the mandrel clamping: the operating personnel press down the handle, the upper center extrudes the first spring to move upward, when the handle hits the locking pin, the locking pin extrudes the second spring, and moves to the end of the baffle together, until the wedge gap on the pin head is clamped into the wedge groove, at this time the operating personnel releases the handle, the handle is limited by the locking pin and will not move downward to reset; the operating personnel holds the mandrel which is integrated with the tooth blank with one hand, puts the bottom end of the mandrel into the lower center, and then puts the top end of the mandrel into the lower center of the upper center from the gap of the blocking sleeve; the operating personnel holds the mandrel with one hand and holds the handle with the other hand, and pushes the limit pin with the thumb, because the limit pin, the baffle and the locking pin are integrated, when the limit pin is pushed, the locking pin will continue to extrude the second spring and move, the wedge gap on the pin head is separated from the wedge groove, and then the handle is pulled upward, the handle moves above the locking pin, and the limit pin is released, the first spring extrudes the upper center to move downward, and the upper center is inserted into the taper hole at the top end of the mandrel; finally, the limit screw is tightened, the limit screw extrudes the outer wall of the upper center to prevent the upper center from moving upward under stress;

[0018] S3, the outer circle runout detection: before detection, the sample gauge needs to be clamped according to S1 and S2, the probe of the sample gauge dial gauge is in contact with the outer circle surface of the sample gauge, the sample gauge is rotated, and the value of the dial gauge is adjusted to zero; during actual detection, the outer circle of the tooth blank is in contact with the probe, the operating personnel rotates the tooth blank, the tooth blank rotates together with the mandrel, the operating personnel observes and records the value change in the dial gauge, if the value of the dial gauge is within the allowed variation range, it is judged that the outer circle runout of the tooth blank is qualified, if the value of the dial gauge is not within the allowed variation range, it is judged that the outer circle runout of the tooth blank is unqualified;

[0019] S4, the mandrel disassembly: the operating personnel first loosens the limit screw, presses down the handle, the upper center extrudes the first spring to move upward, when the handle hits the locking pin, the locking pin extrudes the second spring, and moves to the end of the baffle together, until the wedge gap on the pin head is clamped into the wedge groove, at this time the operating personnel releases the handle, the handle is limited by the locking pin and will not move downward to reset, the operating personnel removes the mandrel;

[0020] S5, the tooth blank disassembly: the operating personnel rotates the press screw counterclockwise with the help of the internal hex wrench, the hydraulic oil pressure is released, and the expansion sleeve is reset, so that the tooth blank can be removed.

[0021] The beneficial effects of the present application are:

[0022] The tooth blank outer circle runout detection device of the new energy automobile main reduction gear of the present application is convenient to disassemble and assemble, and can be operated by a single person, which reduces the labor intensity of employees and ensures the improvement of detection accuracy and efficiency.

[0023] The tooth blank outer circle runout detection device of the new energy automobile main reduction gear of the present application, the mandrel is positioned by the upper and lower centers together, and the detection data is more accurate.

[0024] The tooth blank outer circle runout detection device of the new energy automobile main reduction gear of the application, the locking mechanism can ensure that the locking pin can be clamped with the handle when the mandrel is disassembled and assembled, and single-person operation is realized.

[0025] The tooth blank outer circle runout detection device of the new energy automobile main reduction gear of the application, the mandrel adopts a liquid expansion structure, facilitating rapid installation of the tooth blank.

[0026] The tooth blank outer circle runout detection device of the new energy automobile main reduction gear of the application, when detecting, the upper center is locked by the limiting screw, and the upper center will not be forced to move upward, so that the detection result is more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 It is a structural schematic diagram of the tooth blank.

[0028] Fig. 2 It is a front sectional view of the application.

[0029] Fig. 3 It is a side sectional view of the application.

[0030] Fig. 4 It is a sectional view of the mandrel of the application.

[0031] Fig. 5 It is an axonometric view of the upper limiting seat of the application.

[0032] Fig. 6 It is a structural schematic diagram of the locking mechanism of the application.

[0033] Fig. 7 It is a structural schematic diagram of the working state of the application.

[0034] In the figure: 1 - base, 101 - vertical plate, 102 - horizontal plate, 103 - table frame, 104 - support angle column, 105 - lower center, 2 - lower limiting seat, 201 - center through hole, 3 - upper limiting seat, 301 - stepped through hole, 302 - notch, 4 - upper center, 401 - center body, 402 - sliding column, 403 - sliding rod, 5 - mandrel, 501 - disc, 502 - boss, 503 - expansion sleeve, 504 - oil cavity, 505 - oil channel, 506 - press screw, 6 - blocking sleeve, 601 - gap, 7 - handle, 8 - locking mechanism, 801 - base plate, 802 - upper sliding hole, 803 - lower sliding hole, 804 - baffle, 805 - locking pin, 8051 - pin head, 8052 - pin rod, 8053 - pin tail, 8054 - wedge opening, 806 - limiting pin, 9 - dial indicator, 10 - first spring, 11 - second spring, 12 - limiting screw, 13 - tooth blank, 1301 - center hole, 1302 - web. DETAILED DESCRIPTION

[0035] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0036] Example 1: As Figs. 1-7 As shown, a device for detecting the runout of the outer circle of the main reduction gear blank in a new energy vehicle includes a base 1, a vertical plate 101 connected to the base 1, a horizontal plate 102 connected to the vertical plate 101, a lower limit seat 2 connected to the horizontal plate 102, and an upper limit seat 3 connected to the top of the lower limit seat 2; an upper center 4 is slidably fitted between the upper limit seat 3 and the lower limit seat 2, a lower center 105 concentric with the upper center 4 is connected to the base 1, and a spindle 5 is detachably connected between the upper center 4 and the lower center 105; a stop sleeve 6 is connected to the bottom of the horizontal plate 102, and the upper center 4 can extend into the stop sleeve 6; a handle 7 is connected to the upper center 4, the handle 7 extends to the outside of the upper limit sleeve, and a locking mechanism 8 for locking the handle 7 is connected to the horizontal plate 102; a dial indicator 103 is connected to the base 1 on the side of the spindle 5, and the dial indicator 9 has an insertion hole, into which the sleeve of the dial indicator 9 is inserted and fixed.

[0037] Several supporting corner posts 104 are connected to the lower surface of the base 1. The horizontal plate 102 is connected to one side of the fixed end of the vertical plate 101. The horizontal plate 102 is vertically provided with a mounting hole at the end away from the vertical plate 101. The lower limit seat 2 is interference-fitted into the mounting hole and fixed to the horizontal plate 102. The lower limit seat 2 is provided with a central through hole 201 at its center. The upper limit seat 3 is provided with a two-stage stepped through hole 301 concentric with the central through hole 201 at its center. The upper section of the stepped through hole 301 is smaller than the lower section.

[0038] The upper tip 4 is divided into three sections: the bottom of the upper tip 4 is the tip body 401, the middle is the sliding column 402, and the top is the sliding rod 403. The tip body 401 is slidably fitted to the central through hole 201, the sliding column 402 is slidably fitted to the stepped through hole 301 of the lower section, and the sliding rod 403 is slidably fitted to the stepped through hole 301 of the upper section. The outer wall of the sliding rod 403 inside the upper limit seat 3 is fitted with a first spring 10.

[0039] One end of the handle 7 is rotatably connected to the slide column 402. The side wall of the upper limit seat 3 is provided with a notch 302 that passes through the stepped through hole 301, and the handle 7 is rotatably connected to the notch 302 by a pin.

[0040] The locking mechanism 8 includes a base plate 801, which is connected to the horizontal plate 102. The base plate 801 is provided with an upper sliding hole 802 and a lower sliding hole 803 arranged in parallel. The locking pin 805 and the limiting pin 806 are respectively slidably engaged in the upper sliding hole 802 and the lower sliding hole 803. A baffle 804 is connected to the end of the locking pin 805 and the limiting pin 806 away from the handle 7.

[0041] The upper sliding hole 802 is a stepped hole, the locking pin 805 comprises a pin head 8051, a pin rod 8052 and a pin tail 8053, the pin rod 8052 is slidingly fitted in the large-diameter section of the upper sliding hole 802, the outer wall of the pin tail 8053 in the stepped hole is sleeved with the second spring 11, and the pin head 8051 is provided with an inclined wedge gap 8054 at one end of the bottom, and the handle 7 is provided with a wedge groove matched with the wedge gap 8054.

[0042] The center of the limiting sleeve is provided with a containing hole concentric with the center through hole 201, and the side wall of the limiting sleeve is provided with a gap 601 penetrating the containing hole.

[0043] The mandrel 5 is of a liquid expansion type, the outer wall of the mandrel 5 is connected with a disc 501 arranged concentrically, the disc 501 is connected with a boss 502 arranged concentrically above, the boss 502 is connected with an expansion sleeve 503 on the outer circular surface, and an oil cavity 504 is arranged between the expansion sleeve 503 and the boss 502; one end of the spool is provided with an oil channel 505, one end of the oil channel 505 is threadedly connected with a pressurizing screw 506, and the oil cavity 504 is in communication with the oil channel 505; the outer wall of the mandrel 5 is provided with anti-skid lines, and the upper and lower ends of the mandrel 5 are provided with taper holes for centering.

[0044] One end of the horizontal plate 102 is threadedly connected with a limiting screw 12, and the limiting screw 12 can abut against the outer wall of the top body 401 of the upper center 4.

[0045] The specific working principle of the present application is as follows:

[0046] S1, tooth blank clamping: the tooth blank 13 is sleeved on the outer wall of the circular table, and the web plate 1302 of the tooth blank 13 is clamped on the upper surface of the disc 501; the operating personnel rotates the pressurizing screw 506 clockwise by means of a hexagonal wrench, the pressurizing screw 506 extrudes the hydraulic oil in the oil channel 505, the hydraulic oil enters the oil cavity 504 and is continuously compressed, and the expansion sleeve 503 is extruded and deformed to expand the inner wall of the center hole 1301 of the tooth blank 13;

[0047] S2, the mandrel clamping: the operating personnel press down the handle 7, the upper center 4 extrudes the first spring 10 to move up, when the handle 7 hits the locking pin 805, the locking pin 805 extrudes the second spring 11, and moves to the end where the baffle 804 is together with the limit pin 806, until the wedge gap 8054 on the pin head 8051 is clamped into the wedge slot, at this time the operating personnel releases the handle 7, the handle 7 is limited by the locking pin 805 and will not move down to reset; the operating personnel holds the mandrel 5 which is integrated with the tooth blank 13, puts the bottom end of the mandrel 5 into the lower center 105, inserts the lower center 105 into the taper hole at the bottom of the mandrel 5, and then puts the top end of the mandrel 5 into the lower center 4 from the gap 601 of the alignment sleeve 6; the operating personnel holds the mandrel 5 with one hand and holds the handle 7 with the other hand, and pushes the limit pin 806 with the thumb, since the limit pin 806, the baffle 804 and the locking pin 805 are integrated, when the limit pin 806 is pushed, the locking pin 805 will continue to extrude the second spring 11 and move, the wedge gap 8054 on the pin head 8051 is separated from the wedge slot, and then the handle 7 is pulled up, the handle 7 moves above the locking pin 805 and the limit pin 806 can be released, the first spring 10 extrudes the upper center 4 to move down, and the upper center 4 is inserted into the taper hole at the top end of the mandrel 5; finally, the limit screw 12 is tightened, the limit screw 12 extrudes the outer wall of the upper center 4 to prevent the upper center 4 from moving up under stress;

[0048] S3, the outer circle run-out detection: before detection, the gauge needs to be clamped according to S1 and S2, the probe of the gauge dial indicator 9 is in contact with the outer circle of the gauge, the gauge is rotated, and the value of the dial indicator 9 is adjusted to zero; during actual detection, the outer circle of the tooth blank 13 is in contact with the probe, the operating personnel rotates the tooth blank 13, the tooth blank 13 rotates together with the mandrel 5, the operating personnel observes and records the value change in the dial indicator 9, if the value of the dial indicator 9 is within the allowed variation range, it is judged that the outer circle run-out of the tooth blank 13 is qualified, if the value of the dial indicator 9 is not within the allowed variation range, it is judged that the outer circle run-out of the tooth blank 13 is unqualified;

[0049] S4, the mandrel disassembly: the operating personnel first loosens the limit screw 12, presses down the handle 7, the upper center 4 extrudes the first spring 10 to move up, when the handle 7 hits the locking pin 805, the locking pin 805 extrudes the second spring 11, and moves to the end where the baffle 804 is together with the limit pin 806, until the wedge gap 8054 on the pin head 8051 is clamped into the wedge slot, at this time the operating personnel releases the handle 7, the handle 7 is limited by the locking pin 805 and will not move down to reset, the operating personnel removes the mandrel 5;

[0050] S5, the tooth blank disassembly: the operating personnel rotates the press screw 506 counterclockwise with the help of the internal hex wrench, the hydraulic oil pressure is released, the expansion sleeve 503 resets, and the tooth blank 13 can be removed.

[0051] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent transformation or modification according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A new energy automobile main reduction gear blank outer circle runout detection device, characterized in that: The utility model provides a kind of centering device, including base (1), base (1) is connected with vertical plate (101), vertical plate (101) is connected with horizontal plate (102), horizontal plate (102) is connected with lower limit seat (2), the top of lower limit seat (2) is connected with upper limit seat (3);Upper limit seat (3) and lower limit seat (2) are slidably fitted with upper center (4), base (1) is connected with lower center (105) concentric with upper center (4), and upper center (4) and lower center (105) are detachably connected with mandrel (5);The bottom of horizontal plate (102) is connected with stop sleeve (6), and upper center (4) can be extended into stop sleeve (6);Upper center (4) is connected with handle (7), handle (7) extends to the outside of upper limit sleeve, and horizontal plate (102) is connected with locking mechanism (8) for locking handle (7);The bottom of the side of mandrel (5) is connected with table stand (103), and dial gauge (9) is connected to table stand (103); The locking mechanism (8) includes a base plate (801), which is connected to the horizontal plate (102);The base plate (801) is provided with upper and lower slide holes (802) and (803) arranged in parallel, and a locking pin (805) and a limiting pin (806) are slidably fitted in the upper and lower slide holes (802) and (803), respectively, and the ends of the locking pin (805) and the limiting pin (806) away from the handle (7) are connected with a baffle (804); The upper slide hole (802) is a stepped hole, and the locking pin (805) includes a pin head (8051), a pin shaft (8052), and a pin tail (8053);The pin shaft (8052) is slidably fitted in the large-diameter section of the upper slide hole (802), and the outer wall of the pin tail (8053) in the stepped hole is sleeved with a second spring (11);The bottom of one end of the pin head (8051) is provided with an inclined wedge opening (8054), and the handle (7) is provided with a wedge groove matched with the wedge opening (8054); The mandrel (5) is of a liquid expansion type structure, and the outer wall of the mandrel (5) is connected with a concentric disc (501), the upper side of the disc (501) is connected with a concentric boss (502), the outer circular surface of the boss (502) is connected with an expansion sleeve (503), and an oil cavity (504) is arranged between the expansion sleeve (503) and the boss (502);One end of the mandrel (5) is provided with an oil channel (505), one end of the oil channel (505) is threadedly connected with a pressurizing screw (506), and the oil cavity (504) is in communication with the oil channel (505);The outer wall of the mandrel (5) is provided with anti-slip lines, and the upper and lower ends of the mandrel (5) are provided with tapered holes for centering; One end of the horizontal plate (102) is threadedly connected with a limiting screw (12), and the limiting screw (12) can abut against the outer wall of the center body (401) of the upper center (4). The base (1) lower surface is connected with several support angle columns (104), the horizontal plate (102) is connected to one side of the fixed end of the vertical plate (101); the horizontal plate (102) is vertically provided with a mounting hole at the end away from the vertical plate (101), the lower limit seat (2) is interference fitted in the mounting hole and fixed to the horizontal plate (102), the center of the lower limit seat (2) is provided with a center through hole (201); the center of the upper limit seat (3) is provided with two stepped through holes (301) concentric with the center through hole (201), the upper segment of the stepped through hole (301) is smaller than the lower segment; The upper center (4) is divided into three segments, the bottom end of the upper center (4) is a center body (401), the middle is a sliding column (402), and the top end is a sliding rod (403); the center body (401) is slidingly fitted in the center through hole (201), the sliding column (402) is slidingly fitted in the lower segment of the stepped through hole (301), the sliding rod (403) is slidingly fitted in the upper segment of the stepped through hole (301), and the outer wall of the sliding rod (403) on the inner side of the upper limit seat (3) is sleeved with a first spring (10); One end of the handle (7) is rotatably connected to the sliding column (402), the side wall of the upper limit seat (3) is provided with a notch (302) penetrating the stepped through hole (301), and the handle (7) is rotatably connected to the notch (302) through a pin shaft; The center of the limiting sleeve is provided with a containing hole concentric with the center through hole (201), and the side wall of the limiting sleeve is provided with an aperture (601) penetrating the containing hole.

2. A method for detecting the outer circle runout of a gear blank of a new energy automobile main reduction gear, using the device for detecting the outer circle runout of the gear blank of the new energy automobile main reduction gear according to claim 1, characterized in that The method comprises the following steps: S1, tooth blank clamping: the tooth blank (13) is sleeved on the outer wall of the circular table, and the web (1302) of the tooth blank (13) is connected to the upper surface of the disc (501); the operator rotates the pressing screw (506) clockwise by means of the inner hexagonal wrench, the pressing screw (506) extrudes the hydraulic oil in the oil channel (505), the hydraulic oil enters the oil cavity (504) and is continuously compressed, the expansion sleeve (503) is extruded and deformed, and the inner wall of the central hole (1301) of the tooth blank (13) is expanded; S2, the mandrel clamping: the operating personnel press down the handle (7), the upper tip (4) extrudes the first spring (10) to move upward, the handle (7) encounters the locking pin (805), the locking pin (805) extrudes the second spring (11), and moves to the end where the baffle (804) is together with the limit pin (806), until the wedge gap (8054) on the pin head (8051) is clamped into the wedge groove, at this time, the operating personnel releases the handle (7), the handle (7) is limited by the locking pin (805) and will not move downward to reset; the operating personnel holds the mandrel (5) integrated with the tooth blank (13), puts the bottom end of the mandrel (5) into the lower tip (105), inserts the lower tip (105) into the taper hole at the bottom of the mandrel (5), and then puts the top end of the mandrel (5) into the lower tip (105) from the gap (601) of the alignment sleeve (6) below the upper tip (4); the operating personnel holds the mandrel (5) with one hand, holds the handle (7) with the other hand, and pushes the limit pin (806) with the thumb, because the limit pin (806), the baffle (804) and the locking pin (805) are integrated, when the limit pin (806) is pushed, the locking pin (805) will continue to extrude the second spring (11) and move, the wedge gap (8054) on the pin head (8051) is separated from the wedge groove, and then the handle (7) is pulled upward, the handle (7) moves to the upper side of the locking pin (805), the limit pin (806) can be released, the first spring (10) extrudes the upper tip (4) to move downward, and the upper tip (4) is inserted into the taper hole at the top end of the mandrel (5); finally, the limit screw (12) is tightened, the limit screw (12) extrudes the outer wall of the upper tip (4) to prevent the upper tip (4) from moving upward under stress; S3, the outer circle runout detection: before detection, the sample gauge needs to be clamped according to S1 and S2, the probe of the sample gauge dial gauge (9) is in contact with the outer circle surface of the sample gauge, the sample gauge is rotated, and the value of the dial gauge (9) is adjusted to zero; during actual detection, the outer circle surface of the tooth blank (13) is in contact with the probe, the operating personnel rotates the tooth blank (13), the tooth blank (13) rotates together with the mandrel (5), the operating personnel observes and records the value change in the dial gauge (9), if the value of the dial gauge (9) is within the allowable variation range, it is judged that the outer circle runout of the tooth blank (13) is qualified, if the value of the dial gauge (9) is not within the allowable variation range, it is judged that the outer circle runout of the tooth blank (13) is unqualified; S4, the mandrel disassembly: the operating personnel first loosens the limit screw (12), presses down the handle (7), the upper tip (4) extrudes the first spring (10) to move upward, the handle (7) encounters the locking pin (805), the locking pin (805) extrudes the second spring (11), and moves to the end where the baffle (804) is together with the limit pin (806), until the wedge gap (8054) on the pin head (8051) is clamped into the wedge groove, at this time, the operating personnel releases the handle (7), the handle (7) is limited by the locking pin (805) and will not move downward to reset, the operating personnel removes the mandrel (5) and can be used. S5, tooth blank disassembly: the operator with the help of the inner hexagonal wrench counterclockwise rotation loose press screw (506), hydraulic oil pressure release, the expansion sleeve (503) reset, the tooth blank (13) can be removed.

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