A method for measuring and rolling an integrated bolt

Abstract

The application discloses a kind of screw measuring roll pressing integrated processing method, comprising the following steps: roll pressing tool axial in situ measurement;Clamping bolt;Screw axial in situ measurement;Establish axial tool setting compensation quantity;Establish radial tool setting compensation quantity;Tool setting and roll pressing processing;Complete roll pressing processing.The application utilizes contact probe and dynamometer to automatically complete the online position measurement of roll pressing tool and bolt root R, relief groove, thread root, ensure the online position measurement accuracy of roll pressing tool and bolt roll pressing position, improve the consistency of tool setting accuracy and roll pressing surface quality consistency, thereby reduce the scrap rate, prolong the fatigue life of bolt.The application can complete the roll pressing processing of the batch workpiece by editing measurement, tool setting and roll pressing program only once for the same batch of bolt roll pressing;For different batch of bolt roll pressing, only need to input bolt structure size, the automatic measurement, tool setting and roll pressing processing of different structure bolt sample can be completed;Greatly improve the processing efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bolt processing, in particular to a bolt measuring and rolling integrated processing method. BACKGROUND

[0002] Bolt connectors are widely used in various aircraft structure assemblies, such as body connecting bolts, landing gear force bolts, etc., due to their good stress performance, reliability and other advantages. With the development of China's aviation technology and the improvement of military power, the working conditions of aircraft under extreme conditions such as high speed, high temperature and high pressure, and dynamic load are increasing. During flight, cracks are prone to occur and expand from defects at stress concentration sites such as bolt root, thread root and relief groove, eventually leading to bolt fracture failure. Statistics show that in the fatigue failure of bolts, the head root accounts for 25%, the thread root accounts for 60%, and the relief groove accounts for 15%. Therefore, the bolt root, thread root and relief groove must be rolled and strengthened to introduce residual stress to improve the fatigue life of the bolt.

[0003] At present, the rolling process of the bolt head root, thread root and relief groove surface is mostly carried out on a general lathe. The root rolling tool, relief groove rolling tool and thread root rolling tool are installed on the tool turret of the general lathe, and then the surface strengthening treatment is carried out by manual visual and manual repeated tool setting. Due to the complex structure of the bolt head root and the relief groove surface, including multiple circular arcs and inclined step surfaces, and the very narrow space of the thread root, a large tool setting accuracy error is caused when manually visualizing the tool setting, and the tool setting accuracy consistency is poor when repeatedly changing and setting the tool, which greatly increases the work intensity of workers and seriously reduces the processing efficiency. Therefore, the current manual tool setting for surface rolling of bolts on a general lathe cannot realize the automatic processing of measuring and rolling. The traditional processing method has low processing efficiency, poor workpiece precision consistency, high scrap rate, and extremely high technical requirements for operators, and has been unable to meet the requirements of precise and efficient surface rolling processing and mass production of bolts. Therefore, there is an urgent need to invent or develop a new bolt measuring and rolling integrated processing method to solve the above problems and realize precise, efficient and automatic rolling processing of the bolt surface, and to provide technical support for the precision machining of key parts for aerospace. SUMMARY

[0004] To solve the above problems existing in the prior art, the present application designs a high-efficiency and precise automatic in-situ measuring and tool setting bolt measuring and rolling integrated processing method.

[0005] In order to achieve the above object, the technical scheme of the present application is as follows: a bolt measurement and rolling integrated machining method is processed by using a bolt rolling and strengthening machining equipment, the bolt rolling and strengthening equipment comprises a bed body, a main shaft motor, a main shaft box, a main shaft chuck, a contact probe, a probe feeding unit, a tail center, a tool turret feeding unit, a dynamometer, a tool turret, a tool withdrawal groove rolling tool, a thread rolling tool, a root rolling tool, a machine tool control system and a display unit; the tool turret feeding unit comprises X1 feeding device and Z1 feeding device, and the probe feeding unit comprises X2 feeding device and Z2 feeding device;

[0006] The probe feeding unit moves along the X2 axis and the Z2 axis respectively, and the X2 axis and the Z2 axis origin are at the intersection of the upper end of the bed body and the tail end of the tail center, the X2 axis is perpendicular to the lateral center line of the bed body, and the positive direction is backward to the center line, and the Z2 axis is parallel to the lateral center line of the bed body, and the positive direction is backward to the main shaft box;

[0007] The tool turret feeding unit moves along the X1 axis and the Z1 axis respectively, and the X1 axis and the Z1 axis origin are at the intersection of the lower end of the bed body and the tail end of the tail center, the X1 axis is perpendicular to the lateral center line of the bed body, and the positive direction is away from the center line, and the Z1 axis is parallel to the lateral center line of the bed body, and the positive direction is backward to the main shaft box;

[0008] The machining method comprises the following steps:

[0009] A, axial in-situ measurement of rolling tool

[0010] The probe feeding unit is driven, and the contact probe measures the left end surface Z2 direction position of the root rolling tool, the tool withdrawal groove rolling tool and the thread rolling tool respectively, and is recorded as Z21, Z22 and Z23 respectively; the axial compensation relationship R1 between the tool withdrawal groove rolling tool and the root rolling tool and the axial compensation relationship R2 between the thread rolling tool and the root rolling tool are established, and R1=Z22-Z21 and R2=Z23-Z21;

[0011] B, clamping bolt

[0012] The main shaft chuck clamps the bolt head and the tail center clamps the bolt tail; the nut diameter of the bolt is D1, the rod diameter is D2, the major diameter of the thread is D3, the minor diameter of the thread is d, and the pitch is P;

[0013] C, axial in-situ measurement of bolt

[0014] The contact probe measures the Z2 axial position of the right end surface of the bolt nut and the thread root, and the contact probe feeds back to the machine tool control system and records the right end surface Z2 direction position coordinate Z25 of the nut and the thread root Z2 direction position coordinate Z28;

[0015] D, establishing axial tool compensation amount

[0016] establishing the axial compensation relationship R3 between the root rolling tool and the bolt root, the axial compensation relationship R4 between the relief rolling tool and the bolt relief, and the axial compensation relationship R5 between the thread rolling tool and the thread root, and R3=Z21-Z25, R4=R3-L1+R1, and R5=Z21-Z28+R2, wherein L1 is the axial distance between the relief starting point and the right end surface of the nut;

[0017] E、establishing the radial tool setting compensation

[0018] driving the tool turret feed unit to make the root rolling tool, the relief rolling tool, and the thread rolling tool contact the bolt surface, at which time the dynamometer feeds a contact signal to the machine tool control system and the display unit, and the display unit displays the force value; when the force value starts to change from 0, the coordinate positions of the root rolling tool, the relief rolling tool, and the thread rolling tool in the X1 direction at this time are recorded as X12, X13, and X14, respectively; the radial compensation relationship R6 between the root rolling tool and the bolt, the radial compensation relationship R7 between the relief rolling tool and the bolt, and the radial compensation relationship R8 between the thread rolling tool and the bolt are established, and R6=X12-D2 / 2, R7=X13-D2 / 2, and R8=X14-D2 / 2;

[0019] F、tool setting and rolling processing

[0020] the root rolling tool is moved to the K point position, the relief rolling tool is moved to the M point position, and the thread rolling tool is moved to the N point position to complete the tool setting; interpolation motion is performed according to the surface profile size of the bolt root, the relief, and the thread root, wherein the coordinate positions of the K point in the X1 and Z1 directions are R6+D2 / 2+ap1 and Z11-R3, respectively, the coordinate positions of the M point in the X1 and Z1 directions are R7+D2 / 2+ap1 and Z11-R4, respectively, and the coordinate positions of the N point in the X1 and Z1 directions are R8+d / 2+ap1 and Z11-R5-h+4.5P, respectively, ap1 is the rolling feed depth, and h is the axial distance between the left end surface of the thread rolling tool tip and the center of the thread rolling tool tip;

[0021] G、complete rolling processing.

[0022] Further, in the step A, the axial position measurement of the rolling tool is performed by using a contact probe, including the following steps:

[0023] A1、driving the tool turret feed unit to make the tool turret move to the middle safe position of the rolling machine tool, and recording the coordinate positions of the middle safe position of the rolling machine tool in the X1 and Z1 directions as X11 and Z11, respectively;

[0024] A2, drive the turret rotation makes the root roll tool as a working tool, drive the probe feed unit to make the contact probe touch the left end face of the root roll tool, at this time the contact probe sends a signal to the machine tool control system and display unit, records the current Z2 direction position coordinate Z21 of the root roll tool, and then the contact probe moves to the machine tool origin in the X2 direction;

[0025] A3, the turret rotation makes the retreat tool groove roll tool as a working tool, drive the probe feed unit to make the contact probe touch the left end face of the retreat tool groove roll tool, at this time the contact probe sends a signal to the machine tool control system and display unit, records the current Z2 direction position coordinate Z22 of the retreat tool groove roll tool, and then the contact probe moves to the machine tool origin in the X2 direction;

[0026] A4, the turret rotation makes the thread roll tool as a working tool, drive the probe feed unit to make the contact probe touch the left end face of the thread roll tool, at this time the contact probe sends a signal to the machine tool control system and display unit, records the current Z2 direction position coordinate Z23 of the thread roll tool, and then drive the turret feed unit and the probe feed unit to move to their respective origin coordinate positions;

[0027] A5, calculate Z21, Z22 and Z23, and establish the data compensation relationship of Z22 to Z21 and Z23 based on the reference coordinate Z21.

[0028] Further, in step C, the axial position measurement of the right end face of the bolt and nut and the thread root is carried out by using the contact probe, including the following steps:

[0029] C1, drive the probe feed unit to make the contact probe touch the surface of the bolt in the X2 direction, record the current position coordinates X24 and Z24 of the contact probe in the X2 and Z2 directions; then the contact probe moves to X24+(D1-D2) / 2 in the X2 direction, and touches the right end face of the bolt and nut in the Z2 direction, records the current position coordinates X24+(D1-D2) / 2 and Z25 of the contact probe in the X2 and Z2 directions;

[0030] C2, drive the probe feed unit to move the contact probe to the third thread position at the tail end of the bolt thread, the position coordinates of the third thread position in the X2 and Z2 directions are X24+(D3-D2) / 2 and Z25+L2-3P respectively; make the contact probe move 0.5mm in the negative direction of X2, wherein L2 is the axial distance from the right end face of the bolt and nut to the tail end of the thread;

[0031] C3, determine whether the contact probe touches the threaded part, if the contact probe touches the threaded part, send a signal to the machine tool control system and the display unit, execute step C4, if the contact probe does not touch the threaded part, execute step C5;

[0032] C4, drive the X2 feed device to move the contact probe in the X2 positive direction by 0.5mm, drive the Z2 feed device to move the contact probe in the Z2 negative direction by 0.1mm, drive the X2 feed device to move the contact probe in the X2 negative direction by 0.5mm, and then execute step C3;

[0033] C5, drive the Z2 feed device to make the contact probe touch the two ends of the thread in the Z2 direction, respectively obtain the Z2 direction coordinate positions Z26 and Z27 of the two ends of the thread, at this time the thread root position Z28 is the average of Z26 and Z27, and then drive the probe feed unit to move to the X2, Z2 direction zero point coordinate position.

[0034] Further, in step E, the force gauge is used to feedback the contact between the rolling tool and the surface of the bolt round bar, and the radial in-position compensation relationship between the rolling tool and the bolt is established, which has the following steps:

[0035] E1, rotate the tool turret to make the root rolling tool as the working tool, drive the X1 feed device to make the root rolling tool contact with the surface of the bolt shank in the X1 direction, at this time the force gauge feeds back the signal to the machine tool control system and the display unit, when the force value displayed by the display unit starts to change from 0, record the X1 direction coordinate position X12 of the root rolling tool at this time, and then move the root rolling tool to the zero point coordinate position in the X1 direction;

[0036] E2, rotate the tool turret to make the relief groove rolling tool as the working tool, drive the X1 feed device to make the relief groove rolling tool contact with the surface of the bolt shank in the X1 direction, at this time the force gauge feeds back the signal to the machine tool control system and the display unit, when the force value displayed by the display unit starts to change from 0, record the X1 direction coordinate X13 of the relief groove rolling tool at this time, and then move the relief groove rolling tool to the zero point coordinate position in the X1 direction;

[0037] E3, rotate the tool turret to make the thread rolling tool as the working tool, drive the X1 feed device to make the thread rolling tool contact with the surface of the bolt shank in the X1 direction, at this time the force gauge feeds back the signal to the machine tool control system and the display unit, when the force value displayed by the display unit starts to change from 0, record the X1 direction coordinate X14 of the thread rolling tool at this time, and then drive the tool turret feed unit to move to the zero point coordinate position of the machine tool X1, Z1 direction;

[0038] E4, the bolt shank diameter D2 and X12, X13, X14 are calculated, the root rolling tool and the bolt radial compensation relationship R6, the relief groove rolling tool and the bolt radial compensation relationship R7 and the thread rolling tool and the bolt radial compensation relationship R8 are established, then R6=X12-D2 / 2, R7=X13-D2 / 2 and R8=X14-D2 / 2.

[0039] Further, in the step F, the bolt root, the relief groove and the thread are rolled by different rolling tools, and the steps are as follows:

[0040] F1, the tool turret is rotated to make the root rolling tool as the working tool, the tool turret feed unit is driven to move the root rolling tool to K point to complete tool setting, then interpolation motion is carried out to roll the root surface, the spindle speed is n1, and the axial feed amount is f r1 After rolling is completed, the tool turret feed unit is moved to the original position in the X1, Z1 direction;

[0041] F2, the tool turret is rotated to make the relief groove rolling tool as the working tool, the tool turret feed unit is driven to move the relief groove rolling tool to M point to complete tool setting, then interpolation motion is carried out to roll the relief groove surface, the spindle speed is n1, and the axial feed amount is f r1 After rolling is completed, the tool turret feed unit is moved to the original position in the X1, Z1 direction;

[0042] F3, the tool turret is rotated to make the thread rolling tool as the working tool, the tool turret feed unit is driven to move the thread rolling tool to N point to complete tool setting, then thread interpolation motion is carried out to roll the thread root surface, the spindle speed is n2, and the axial feed amount is f r2 After rolling is completed, the tool turret feed unit is moved to the original position in the X1, Z1 direction;

[0043] Further, in the step F3, the maximum allowable spindle speed n2 is 0-100 r / min, and the axial feed amount f r2 = the thread pitch P.

[0044] Compared with the prior art, the present application has the following beneficial effects:

[0045] 1. The present application automatically completes the online position measurement of the rolling tool and the bolt root R, the relief groove and the thread root by using the contact probe and the force gauge, avoids the manual visual inspection and repeated manual tool setting in the traditional rolling process, ensures the online position measurement accuracy of the rolling tool and the bolt rolling position, improves the consistency of tool setting accuracy and the consistency of rolling surface quality, thereby reducing the scrap rate and prolonging the fatigue life of the bolt.

[0046] 2、The invention is for the same batch of bolt rolling, only need to edit once the measurement, tool setting and rolling program can complete the batch workpiece rolling; for different batch of bolt rolling, only need to input the bolt structure size can complete the automatic measurement, tool setting and rolling of different structure bolt sample; the invention is suitable for single piece small batch production, also suitable for batch production, at the same time, the operation is simple, reduces the technical requirements for operators, greatly improves the processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 It is a schematic diagram of the measuring-rolling integrated numerical control bolt rolling equipment.

[0048] Figure 2 It is a flowchart of the invention.

[0049] Figure 3 It is a schematic diagram of the root rolling tool and the in-situ measurement of the bolt root.

[0050] Figure 4 It is a schematic diagram of the relief groove rolling tool and the in-situ measurement of the bolt relief groove.

[0051] Figure 5 It is a schematic diagram of the thread rolling tool and the in-situ measurement of the bolt thread root.

[0052] Figure 6 It is a schematic diagram of the root rolling tool and the tool setting and rolling of the bolt root.

[0053] Figure 7 It is a schematic diagram of the relief groove rolling tool and the tool setting and rolling of the bolt relief groove.

[0054] Figure 8 It is a schematic diagram of the thread rolling tool and the tool setting and rolling of the bolt thread root.

[0055] In the figure: 1, main shaft motor, 2, main shaft box, 3, main shaft chuck, 4, contact probe, 5, probe feeding unit, 6, Z2 axis, 7, tail center, 8, X2 axis, 9, X1 axis, 10, Z1 axis, 11, bed, 12, tool turret feeding unit, 13, dynamometer, 14, tool turret, 15, relief groove rolling tool, 16, thread rolling tool, 17, root rolling tool, 18, machine tool control system and display unit. DETAILED DESCRIPTION

[0056] The invention will be further described below in conjunction with the drawings.

[0057] A bolt measuring-rolling integrated machining method, based on Figure 1The shown bolt roll strengthening processing equipment is realized, the roll equipment includes spindle motor 1, spindle box 2, spindle chuck 3, contact probe 4, probe feed unit 5, Z2 axis 6, tail center 7, X2 axis 8, X1 axis 9, Z1 axis 10, bed 11, tool turret feed unit 12, dynamometer 13, tool turret 14, tool withdrawal groove roll tool 15, thread roll tool 16, root roll tool 17, machine tool control system and display unit 18.The contact probe 4 is fixedly installed on the probe feed unit 5, the tool turret 14 is fixedly installed on the tool turret feed unit 12, the probe feed unit 5 moves on the X2 axis 8 and the Z2 axis 6, the tool turret feed unit 12 moves on the X1 axis 9 and the Z1 axis 10, the spindle chuck 3 is connected with the spindle box 2, the spindle box 2 is driven to rotate by the spindle motor 1, the spindle chuck 3 is provided with three jaws, one end of the bolt workpiece is clamped by the three jaws, and the other end is tightly pressed by the tail center 7, and the tool withdrawal groove roll tool 15, the thread roll tool 16 and the root roll tool 17 are fixedly connected on the tool turret 14.

[0058] A kind of bolt measurement-rolling integrated processing method, as shown in Figures 2-8 Including the following steps:

[0059] A, roll tool axial in-situ measurement

[0060] Drive probe feed unit 5, so that contact probe 4 measures the left end surface Z2 direction position of root roll tool 17, tool withdrawal groove roll tool 15 and thread roll tool 16 respectively, and is recorded as Z21, Z22 and Z23 respectively;Establish the axial compensation relationship R1 of tool withdrawal groove roll tool 15 and root roll tool 17 and the axial compensation relationship R2 of thread roll tool 16 and root roll tool 17, then R1=Z22-Z21, R2=Z23-Z21;

[0061] B, clamp bolt

[0062] Spindle chuck 3 clamps bolt head, tail center 7 tightens bolt tail;Record the nut diameter of bolt as D1, the screw diameter as D2, the major diameter of thread as D3, the minor diameter of thread as d, and the pitch as P;

[0063] C, bolt axial in-situ measurement

[0064] Contact probe 4 measures the Z2 axial position of the right end surface of bolt nut and thread tooth root, and contact probe 4 feeds back to machine tool control system 18 and records the right end surface Z2 direction position coordinate Z25 of nut and the Z2 direction position coordinate Z28 of thread tooth root;

[0065] D, establish axial tool setting compensation

[0066] The axial compensation relationship R3 between the root rolling tool 17 and the bolt root, the axial compensation relationship R4 between the relief rolling tool 15 and the bolt relief, and the axial compensation relationship R5 between the thread rolling tool 16 and the thread root are established, and R3 = Z21-Z25, R4 = R3-L1+R1, and R5 = Z21-Z28+R2, wherein L1 is the axial distance between the relief starting point and the right end surface of the nut;

[0067] E. Establishing the radial tool setting compensation

[0068] The tool turret feed unit 12 is driven to make the root rolling tool 17, the relief rolling tool 15, and the thread rolling tool 16 contact the bolt surface. At this time, the force gauge 13 feeds back a contact signal to the machine tool control system and the display unit 18. The display unit 18 displays the force value. When the force value starts to change from 0, the coordinate positions of the root rolling tool 17, the relief rolling tool 15, and the thread rolling tool 16 in the X1 direction at this time are recorded as X12, X13, and X14, respectively. The radial compensation relationship R6 between the root rolling tool 17 and the bolt, the radial compensation relationship R7 between the relief rolling tool 15 and the bolt, and the radial compensation relationship R8 between the thread rolling tool 16 and the bolt are established, and R6 = X12-D2 / 2, R7 = X13-D2 / 2, and R8 = X14-D2 / 2.

[0069] F. Tool setting and rolling processing

[0070] The root rolling tool 17 moves to the K point position, the relief rolling tool 15 moves to the M point position, and the thread rolling tool 16 moves to the N point position to complete the tool setting. Interpolation motion is performed according to the surface profile size of the bolt root, the relief, and the thread root, wherein the coordinate positions of the K point in the X1 and Z1 directions are R6+D2 / 2+ap1 and Z11-R3, respectively, the coordinate positions of the M point in the X1 and Z1 directions are R7+D2 / 2+ap1 and Z11-R4, respectively, and the coordinate positions of the N point in the X1 and Z1 directions are R8+d / 2+ap1 and Z11-R5-h+4.5P, respectively, ap1 is the rolling feed depth, and h is the axial distance between the left end surface of the thread rolling tool nose and the center of the nose.

[0071] G. Complete rolling processing.

[0072] Further, in the step A, the axial position measurement of the rolling tool is performed by using a contact probe, which includes the following steps:

[0073] A1. The tool turret feed unit 5 is driven to move the tool turret 14 to the middle safety position of the rolling machine tool. The coordinate positions of the middle safety position of the rolling machine tool in the X1 and Z1 directions are X11 and Z11, respectively.

[0074] A2, drive the turret 14 rotation makes the root roll tool 17 as a working tool, drive the probe feed unit 5 makes the contact probe 4 touch the left end surface of the root roll tool 17, at this time the contact probe 4 sends a signal to the machine tool control system and display unit 18, records the current Z2 direction position coordinate Z21 of the root roll tool 17, then the contact probe 4 moves to the machine tool origin in the X2 direction;

[0075] A3, the turret 14 rotation makes the tool withdrawal groove roll tool 15 as a working tool, drive the probe feed unit 5 makes the contact probe 4 touch the left end surface of the tool withdrawal groove roll tool 15, at this time the contact probe 4 sends a signal to the machine tool control system and display unit 18, records the current Z2 direction position coordinate Z22 of the tool withdrawal groove roll tool 15, then the contact probe 4 moves to the machine tool origin in the X2 direction;

[0076] A4, the turret 14 rotation makes the thread roll tool 16 as a working tool, drive the probe feed unit 5 makes the contact probe 4 touch the left end surface of the thread roll tool 16, at this time the contact probe 4 sends a signal to the machine tool control system and display unit 18, records the current Z2 direction position Z23 of the thread roll tool 16, then drive the turret feed unit 12 and the probe feed unit 5 move to the machine tool X1, Z1, X2 and Z2 direction origin coordinate position;

[0077] A5, calculate Z21, Z22 and Z23, and establish the data compensation relationship of Z22 to Z21 and Z23 based on the reference coordinate Z21.

[0078] Further, in step C, the axial position measurement of the right end surface of the bolt and nut and the thread root is carried out by using the contact probe, which includes the following steps:

[0079] C1, drive the probe feed unit 5 to make the contact probe 4 touch the surface of the bolt in the X2 direction, and record the current position coordinates X24 and Z24 of the contact probe 4 in the X2 and Z2 directions; then the contact probe 4 moves to X24+(D1-D2) / 2 in the X2 direction, touches the right end surface of the bolt and nut in the Z2 direction, and records the current position coordinates X24+(D1-D2) / 2 and Z25 of the contact probe 4 in the X2 and Z2 directions;

[0080] C2, drive the probe feed unit 5 to move the contact probe 4 to the third thread position at the tail end of the bolt thread, and the position coordinates of the third thread position in the X2 and Z2 directions are X24+(D3-D2) / 2 and Z25+L2-3P respectively; make the contact probe 4 move 0.5mm in the negative direction of X2, wherein L2 is the axial distance from the right end surface of the bolt and nut to the tail end of the thread;

[0081] C3, determine whether the contact probe 4 touches the threaded portion, if the contact probe 4 touches the threaded portion, send a signal to the machine tool control system and display unit 18, execute step C4, if the contact probe 4 does not touch the threaded portion, execute step C5;

[0082] C4, drive the X2 feed device to move the contact probe 4 in the positive direction of X2 by 0.5mm, drive the Z2 feed device to move the contact probe in the negative direction of Z2 by 0.1mm, drive the X2 feed device to move the contact probe in the negative direction of X2 by 0.5mm, and then execute step C3;

[0083] C5, drive the Z2 feed device to make the contact probe 4 touch both ends of the thread in the Z2 direction, and obtain the coordinate positions Z26 and Z27 of both ends of the thread in the Z2 direction, at this time the thread root position Z28 is the average of Z26 and Z27, then drive the probe feed unit 5 to move to the X2, Z2 direction zero coordinate position.

[0084] Further, in step E, the force gauge is used to feedback the contact between the rolling tool and the surface of the bolt round bar, and the radial in-position compensation relationship between the rolling tool and the bolt is established, which has the following steps:

[0085] E1, rotate the tool turret 14 to make the root rolling tool 17 the working tool, drive the X1 feed device to make the root rolling tool 17 contact the surface of the bolt shank in the X1 direction, at this time the force gauge 13 feeds back the signal to the machine tool control system and display unit 18, when the force value displayed by the display unit 18 starts to change from 0, record the position coordinate X12 of the root rolling tool 17 in the X1 direction at this time, and then move the root rolling tool 17 to the zero coordinate position in the X1 direction;

[0086] E2, rotate the tool turret 14 to make the relief groove rolling tool 15 the working tool, drive the X1 feed device to make the relief groove rolling tool 15 contact the surface of the bolt shank in the X1 direction, at this time the force gauge 13 feeds back the signal to the machine tool control system and display unit 18, when the force value displayed by the display unit 18 starts to change from 0, record the position coordinate X13 of the relief groove rolling tool 15 in the X1 direction at this time, and then move the relief groove rolling tool 15 to the zero coordinate position in the X1 direction;

[0087] E3, rotate the tool turret 14 to make the thread rolling tool 16 the working tool, drive the X1 feed device to make the thread rolling tool 16 contact the surface of the bolt shank in the X1 direction, at this time the force gauge 13 feeds back the signal to the machine tool control system and display unit 18, when the force value displayed by the display unit 18 starts to change from 0, record the position coordinate X14 of the thread rolling tool 16 in the X1 direction at this time, and then drive the tool turret feed unit 12 to move to the machine tool X, Z direction zero coordinate position;

[0088] E4, the bolt shank diameter D2 and X12, X13, X14 are calculated, the root rolling tool 17 and the bolt radial compensation relationship R6, the relief groove rolling tool 15 and the bolt radial compensation relationship R7 and the thread rolling tool 16 and the bolt radial compensation relationship R8 are established, then R6=X12-D2 / 2, R7=X13-D2 / 2 and R8=X14-D2 / 2.

[0089] Further, in the step F, the bolt root, the relief groove and the thread are rolled by different rolling tools, and the steps are as follows:

[0090] F1, the tool holder 14 is rotated to make the root rolling tool 17 as a working tool, the tool holder feed unit 12 is driven to move the root rolling tool 17 to the K point to complete tool setting, and then interpolation motion is carried out to roll the root surface, the spindle speed is n1, and the axial feed amount is f r1 After rolling is completed, the tool holder feed unit 12 is moved to the X, Z direction origin position;

[0091] F2, the tool holder 14 is rotated to make the relief groove rolling tool 15 as a working tool, the tool holder feed unit 12 is driven to move the relief groove rolling tool 15 to the M point to complete tool setting, and then interpolation motion is carried out to roll the relief groove surface, the spindle speed is n1, and the axial feed amount is f r1 After rolling is completed, the tool holder feed unit 12 is moved to the X, Z direction origin position;

[0092] F3, the tool holder 14 is rotated to make the thread rolling tool 16 as a working tool, the tool holder feed unit 12 is driven to move the thread rolling tool 16 to the N point to complete tool setting, and then thread interpolation motion is carried out to roll the thread root surface, the spindle speed is n2, and the axial feed amount is f r2 After rolling is completed, the tool holder feed unit 12 is moved to the X, Z direction origin position;

[0093] Further, in the step F3, the maximum allowable spindle speed n2 is 0-100 r / min, and the axial feed amount f r2 = the thread pitch P.

[0094] The embodiments of the application are as follows:

[0095] A, the axial in-situ measurement of the rolling tool

[0096] The contact probe 4 is driven by the probe feed unit 5 to measure the left end surface Z2 direction positions of the root rolling tool 17, the relief groove rolling tool 15 and the thread rolling tool 16 respectively, and is recorded as Z21, Z22 and Z23 respectively; the relief groove rolling tool 15 and the root rolling tool 17 axial compensation relationship R1 and the thread rolling tool 16 and the root rolling tool 17 axial compensation relationship R2 are established, then R1=Z22-Z21, R2=Z23-Z21;

[0097] B, clamping bolt

[0098] The spindle chuck 3 clamping bolt head, tail center 7 tail bolt end; the bolt nut diameter is D1=28mm, the screw diameter is D2=10.2mm, the thread major diameter is D3=10mm, the thread minor diameter is d=8.04mm, and the pitch is P=1.5mm;

[0099] C, bolt axial in-situ measurement

[0100] The contact probe 4 measures the Z2 axial position of the right end face of the bolt nut and the thread root, and the contact probe 4 is fed back to the machine tool control system 18 and the Z2 direction position coordinates Z25 of the right end face of the nut and the Z2 direction position coordinates Z28 of the thread root are recorded;

[0101] D, establish axial tool setting compensation

[0102] The axial compensation relationship R3 between the root rolling tool 17 and the bolt root, the axial compensation relationship R4 between the relief groove rolling tool 15 and the bolt relief groove, and the axial compensation relationship R5 between the thread rolling tool 16 and the thread root are established, that is, R3=Z21-Z25, R4=R3-Z28+R1, and R5=Z21-Z28+R2, wherein L1=28mm is the axial distance between the start of the relief groove and the right end face of the nut;

[0103] E, establish radial tool setting compensation

[0104] The driving tool tower feeding unit 12 is driven to make the root rolling tool 17, the relief groove rolling tool 15 and the thread rolling tool 16 contact with the bolt surface. At this time, the force meter 13 feeds back the contact signal to the machine tool control system and the display unit 18, and the display unit 18 displays the force value. When the force value changes from 0, the coordinate positions of the root rolling tool 17, the relief groove rolling tool 15 and the thread rolling tool 16 in the X1 direction are recorded at this time, which are X12, X13 and X14 respectively. The radial compensation relationship R6 between the root rolling tool 17 and the bolt, the radial compensation relationship R7 between the relief groove rolling tool 15 and the bolt, and the radial compensation relationship R8 between the thread rolling tool 16 and the bolt are established, that is, R6=X12-10.2 / 2, R7=X13-10.2 / 2, and R8=X14-10.2 / 2;

[0105] F, tool setting and rolling processing

[0106] ​The root rolling tool 17 moves to the K point position, the relief groove rolling tool 15 moves to the M point position, and the thread rolling tool 16 moves to the N point position to complete the tool setting. According to the bolt root, the relief groove, and the thread tooth bottom surface profile size, interpolation motion is carried out, wherein the K point is at the coordinate positions of R6+5.1-0.1 and Z11-R3 in the X1 and Z1 directions, respectively, the M point is at the coordinate positions of R7+5.1-0.1 and Z11-R4 in the X1 and Z1 directions, respectively, and the N point is at the coordinate positions of R8+4.02-0.1 and Z11-R5-1+4.5*1.5 in the X1 and Z1 directions, respectively, ap1=-0.1 mm is the rolling feed depth, and h=1 mm is the axial distance between the left end face of the tool tip of the thread rolling tool and the center of the tool tip.

[0107] G, completing the rolling processing.

[0108] Further, in the step A, the axial position measurement of the rolling tool is carried out by using the contact probe, which includes the following steps:

[0109] A1, driving the tool turret feed unit 5 to move the tool turret 14 to the middle safety position of the rolling machine, and recording that the coordinate positions of the middle safety position of the rolling machine in the X1 and Z1 directions are X11 and Z11, respectively;

[0110] A2, driving the tool turret 14 to rotate to make the root rolling tool 17 as the working tool, driving the probe feed unit 5 to make the contact probe 4 touch the left end face of the tool tip of the root rolling tool 17 in the Z2 direction, at this time, the contact probe 4 sends a signal to the machine tool control system and the display unit 18, records the current Z2 direction position coordinate Z21 of the tool tip of the root rolling tool 17, and then the contact probe 4 moves to the machine tool origin in the X2 direction;

[0111] A3, rotating the tool turret 14 to make the relief groove rolling tool 15 as the working tool, driving the probe feed unit 5 to make the contact probe 4 touch the left end face of the tool tip of the relief groove rolling tool 15 in the Z2 direction, at this time, the contact probe 4 sends a signal to the machine tool control system and the display unit 18, records the current Z2 direction position coordinate Z22 of the tool tip of the relief groove rolling tool 15, and then the contact probe 4 moves to the machine tool origin in the X2 direction;

[0112] A4, rotating the tool turret 14 to make the thread rolling tool 16 as the working tool, driving the probe feed unit 5 to make the contact probe 4 touch the left end face of the tool tip of the thread rolling tool 16 in the Z2 direction, at this time, the contact probe 4 sends a signal to the machine tool control system and the display unit 18, records the current Z2 direction position Z23 of the tool tip of the thread rolling tool 16, and then drives the tool turret feed unit 12 and the probe feed unit 5 to move to the coordinate position of the machine tool origin in the X1, Z1, X2, and Z2 directions;

[0113] A5, calculate Z21, Z22, Z23, and establish the data compensation relationship of Z22 to Z21 and Z23 based on the coordinate of Z21.

[0114] Further, in the step C, the axial position measurement of the right end surface of the bolt and nut and the thread root is performed by using the contact probe, including the following steps:

[0115] C1, drive the probe feeding unit 5 to make the contact probe 4 touch the bolt screw surface in the X2 direction, record the current position coordinates X24 and Z24 of the contact probe 4 in the X2 and Z2 directions; then the contact probe 4 is moved to X24+(28-10.2) / 2 in the X2 direction, and the right end surface of the bolt and nut is touched in the Z2 direction, and the current position coordinates X24+(28-10.2) / 2 and Z25 of the contact probe 4 in the X2 and Z2 directions are recorded.

[0116] C2, drive the probe feeding unit 5 to move the contact probe 4 to the third thread position at the tail end of the bolt thread, and the position coordinates of the third thread position in the X2 and Z2 directions are X24+(10-10.2) / 2 and Z25+48-3*1.5 respectively; then the contact probe 4 is moved by 0.5mm in the negative direction of X2, wherein L2=48mm is the axial distance from the right end surface of the bolt and nut to the tail end of the thread;

[0117] C3, determine whether the contact probe 4 touches the thread position, if the contact probe 4 touches the thread position, send a signal to the machine tool control system and the display unit 18, and execute step C4, if the contact probe 4 does not touch the thread position, execute step C5;

[0118] C4, drive the X2 feeding device to move the contact probe 4 by 0.5mm in the positive direction of X2, drive the Z2 feeding device to move the contact probe 4 by 0.1mm in the negative direction of Z2, drive the X2 feeding device to move the contact probe 4 by 0.5mm in the negative direction of X2, and then execute step C3;

[0119] C5, drive the Z2 feeding device to make the contact probe 4 touch the thread tooth ends in the Z2 direction, and obtain the Z2 direction coordinate positions Z26 and Z27 of the thread tooth ends respectively, at this time the thread root position Z28 is the average of Z26 and Z27, then drive the probe feeding unit 5 to move to the zero coordinate position in the X2 and Z2 directions.

[0120] Further, in the step E, the contact between the rolling tool and the bolt round bar surface is fed back by using the force gauge, and the in-place compensation relationship between the rolling tool and the bolt radial direction is established, which has the following steps:

[0121] E1, the root rolling tool 17 is the working tool when the tool turret 14 rotates, the X1 feed device is driven to make the root rolling tool 17 contact with the bolt screw surface in the X1 direction, at this time the dynamometer 13 feeds back signals to the machine tool control system and the display unit 18, when the force value displayed by the display unit 18 changes from 0, the position coordinate X12 of the root rolling tool 17 in the X1 direction at this time is recorded, then the root rolling tool 17 is moved to the zero point coordinate position in the X1 direction;

[0122] E2, the tool turret 14 rotates to make the relief groove rolling tool 15 the working tool, the X1 feed device is driven to make the relief groove rolling tool 15 contact with the bolt screw surface in the X1 direction, at this time the dynamometer 13 feeds back signals to the machine tool control system and the display unit 18, when the force value displayed by the display unit 18 changes from 0, the position coordinate X13 of the relief groove rolling tool 15 in the X1 direction at this time is recorded, then the relief groove rolling tool 15 is moved to the zero point coordinate position in the X1 direction;

[0123] E3, the tool turret 14 rotates to make the thread rolling tool 16 the working tool, the X1 feed device is driven to make the thread rolling tool 16 contact with the bolt screw surface in the X1 direction, at this time the dynamometer 13 feeds back signals to the machine tool control system and the display unit 18, when the force value displayed by the display unit 18 changes from 0, the position coordinate X14 of the thread rolling tool 16 in the X1 direction at this time is recorded, then the tool turret feed unit 12 is driven to move to the zero point coordinate position in the machine tool X, Z directions;

[0124] E4, the bolt screw diameter D2 and X12, X13, X14 are calculated, the radial compensation relationship R6 between the root rolling tool 17 and the bolt, the radial compensation relationship R7 between the relief groove rolling tool 15 and the bolt and the radial compensation relationship R8 between the thread rolling tool 16 and the bolt are established, then R6=X12-10.2 / 2, R7=X13-10.2 / 2 and R8=X14-10.2 / 2.

[0125] Further, in the step F, the bolt root, the relief groove and the thread are rolled by different rolling tools, and the steps are as follows:

[0126] F1, the tool turret 14 rotates to make the root rolling tool 17 the working tool, the tool turret feed unit 12 is driven to move the root rolling tool 17 to the K point to complete tool setting, then interpolation motion is carried out to roll the root surface, the spindle speed is n1, the axial feed amount is f r1 , after rolling, the tool turret feed unit 12 moves to the original position in the X, Z directions, wherein the spindle speed is n1=600r / min and the axial feed amount is f r1 =0.05mm / r;

[0127] F2, the knife tower 14 rotates and makes the knife groove rolling tool 15 as a working tool, drives the knife tower feed unit 12 to make the knife groove rolling tool 15 move to the M point to complete tool setting, then carries out interpolation movement to roll the surface of the knife groove, the spindle speed is n1, the axial feed amount is f r1 , after the rolling is completed, the knife tower feed unit 12 moves to the X, Z direction original point position, wherein the spindle speed is n1=600r / min, the axial feed amount is f r1 =0.05mm / r;

[0128] F3, the knife tower 14 rotates and makes the thread rolling tool 16 as a working tool, drives the knife tower feed unit 12 to make the thread rolling tool 16 move to the N point to complete tool setting, then carries out thread interpolation movement to roll the surface of the thread root, the spindle speed is n2, the axial feed amount is f r2 , after the rolling is completed, the knife tower feed unit 12 moves to the X, Z direction original point position, wherein the spindle speed is n2=20r / min, the axial feed amount is f r1 =1.5mm / r;

[0129] The present application is not limited to the embodiment, any equivalent concept or change within the technical range disclosed in the present application is included in the protection scope of the present application.

Claims

1. A bolt measurement and rolling integrated processing method, using bolt rolling and strengthening processing equipment, the bolt rolling and strengthening processing equipment including a bed (11), a spindle motor (1), a spindle box (2), a spindle chuck (3), a contact probe (4), a probe feed unit (5), a tailstock center (7), a turret feed unit (12), a force gauge (13), a turret (14), a relief groove rolling tool (15), a thread rolling tool (16), a root rolling tool (17), and a machine tool control system and display unit (18); the turret feed unit (12) includes an X1 feed device and a Z1 feed device; the probe feed unit (5) includes an X2 feed device and a Z2 feed device; The probe feed unit (5) moves along the X2 axis (8) and the Z2 axis (6) respectively. The origin of the X2 axis (8) and the Z2 axis (6) is at the intersection of the upper end of the bed (11) and the tail end of the tail tip (7). The X2 axis (8) is perpendicular to the transverse center line of the bed (11) and the direction away from the center line is the positive direction. The Z2 axis (6) is parallel to the transverse center line of the bed (11) and the direction away from the spindle box (2) is the positive direction. The turret feed unit (12) moves along the X1 axis (9) and Z1 axis (10) respectively. The origin of the X1 axis (9) and Z1 axis (10) is at the intersection of the lower end of the bed (11) and the tail end of the tail tip (7). The X1 axis (9) is perpendicular to the transverse center line of the bed (11) and the direction away from the center line is the positive direction. The Z1 axis (10) is parallel to the transverse center line of the bed (11) and the direction away from the spindle box (2) is the positive direction. Its features are: The processing method includes the following steps: A. Axial in-situ measurement of the rolling tool Drive the probe feed unit (5) so that the contact probe (4) measures the Z2 position of the left end face of the root rolling tool (17), the relief groove rolling tool (15) and the thread rolling tool (16) respectively, and records them as Z21, Z22 and Z23 respectively; establish the axial compensation relationship R1 between the relief groove rolling tool (15) and the root rolling tool (17) and the axial compensation relationship R2 between the thread rolling tool (16) and the root rolling tool (17), then R1 = Z22 - Z21, R2 = Z23 - Z21; B. Clamping bolts The spindle chuck (3) clamps the head and tail of the bolt, and the center (7) tightens the tail of the bolt; the diameter of the bolt nut is D1, the diameter of the bolt rod is D2, the major diameter of the thread is D3, the minor diameter of the thread is d, and the pitch is P; C. Bolt axial in-situ measurement The contact probe (4) measures the Z2 axis (6) position of the right end face of the bolt and nut and the root of the thread. The contact probe (4) feeds back to the machine tool control system and records the Z2 direction position coordinate Z25 of the right end face of the nut and the Z2 direction position coordinate Z28 of the root of the thread. D. Establish axial tool setting compensation. Establish the axial compensation relationship R3 between the root rolling tool (17) and the bolt root, the axial compensation relationship R4 between the relief groove rolling tool (15) and the bolt relief groove, and the axial compensation relationship R5 between the thread rolling tool (16) and the thread root. Then R3 = Z21 - Z25, R4 = R3 - L1 + R1 and R5 = Z21 - Z28 + R2, where L1 is the axial distance between the starting point of the relief groove and the right end face of the nut. E. Establish radial tool setting compensation amount Drive the turret feed unit (12) to make the root rolling tool (17), the relief groove rolling tool (15) and the thread rolling tool (16) contact the bolt surface. At this time, the force measuring instrument (13) feeds the contact signal back to the machine tool control system and the display unit (18). The display unit displays the force value. When the force value changes from 0, record the coordinate position of the root rolling tool (17), the relief groove rolling tool (15) and the thread rolling tool (16) in the X1 direction, which are X12, X13 and X14 respectively. Establish the radial compensation relationship R6 between the root rolling tool (17) and the bolt, the radial compensation relationship R7 between the relief groove rolling tool (15) and the bolt and the radial compensation relationship R8 between the thread rolling tool (16) and the bolt. Then R6 = X12-D2 / 2, R7 = X13-D2 / 2 and R8 = X14-D2 / 2. F. Tool setting and burnishing The root rolling tool (17) is moved to point K, the relief groove rolling tool (15) is moved to point M, and the thread rolling tool is moved to point N to complete the tool setting. The interpolation movement is performed according to the contour dimensions of the bolt root, relief groove and thread root surface. The coordinate positions of point K in the X1 and Z1 directions are R6+D2 / 2+ap1 and Z11-R3, respectively. The coordinate positions of point M in the X1 and Z1 directions are R7+D2 / 2+ap1 and Z11-R4, respectively. The coordinate positions of point N in the X1 and Z1 directions are R8+d / 2+ap1 and Z11-R5-h+4.5P, respectively. ap1 is the rolling depth, and h is the axial distance between the left end face of the thread rolling tool (16) tip and the tip center. G. Complete the roll forming process.

2. The bolt measurement and rolling integrated processing method according to claim 1, characterized in that: In step A, the axial position of the rolling tool is measured using a contact probe (4), which includes the following steps: A1. Drive the turret feed unit (12) to move the turret (14) to the middle safe position of the rolling mill. Record the coordinates of the middle safe position of the rolling mill in the X1 and Z1 directions as X11 and Z11, respectively. A2. Drive the turret (14) to rotate so that the root rolling tool (17) becomes the working tool. Drive the probe feed unit (5) so that the contact probe (4) touches the left end face of the root rolling tool (17) tip in the Z2 direction. At this time, the contact probe (4) sends a signal to the machine tool control system and the display unit (18) to record the current Z2 direction position coordinate Z21 of the root rolling tool (17) tip. Then the contact probe (4) moves to the machine tool origin in the X2 direction. A3. The turret (14) rotates to make the relief groove rolling tool (15) the working tool, and drives the probe feed unit (5) to make the contact probe (4) touch the left end face of the tip of the relief groove rolling tool (15) in the Z2 direction. At this time, the contact probe (4) sends a signal to the machine tool control system and the display unit (18) to record the current Z2 direction position coordinate Z22 of the tip of the relief groove rolling tool (15). Then the contact probe (4) moves to the machine tool origin in the X2 direction. A4. The turret (14) rotates to make the thread rolling tool (16) the working tool, and drives the probe feed unit (5) to make the contact probe (4) touch the left end face of the tip of the thread rolling tool (16) in the Z2 direction. At this time, the contact probe (4) sends a signal to the machine tool control system and the display unit (18) to record the current Z2 direction position Z23 of the tip of the thread rolling tool (16). Then, the turret feed unit (12) and the probe feed unit (5) are driven to move to their respective origin coordinate positions. A5. Calculate Z21, Z22, and Z23, and establish the data compensation relationship between Z22 and Z21 and between Z23 and Z21 with Z21 as the reference coordinate.

3. The bolt measurement and rolling integrated processing method according to claim 1, characterized in that: In step C, the axial position measurement of the right end face of the bolt and nut and the root of the thread is performed using a contact probe (4), including the following steps: C1. Drive the probe feed unit (5) to make the contact probe (4) touch the bolt thread surface in the X2 direction, and record the current position coordinates X24 and Z24 of the contact probe (4) in the X2 and Z2 directions; then the contact probe (4) moves to X24+(D1-D2) / 2 in the X2 direction and touches the right end face of the bolt nut in the Z2 direction, and records the current position coordinates X24+(D1-D2) / 2 and Z25 of the contact probe (4) in the X2 and Z2 directions; C2. Drive the probe feed unit (5) to move the contact probe (4) to the position of the third thread at the end of the bolt thread. The position coordinates of the third thread in the X2 and Z2 directions are X24+(D3-D2) / 2 and Z25+L2-3P, respectively. Move the contact probe (4) 0.5mm along the negative X2 direction, where L2 is the axial distance from the right end face of the bolt nut to the end of the thread. C3. Determine whether the contact probe (4) has touched the threaded part. If the contact probe (4) has touched the threaded part, send a signal to the machine tool control system and display unit (18) and execute step C4. If the contact probe (4) has not touched the threaded part, execute step C5. C4. Drive the X2 feed device to move the contact probe (4) 0.5mm in the positive X2 direction, drive the Z2 feed device to move the contact probe (4) 0.1mm in the negative Z2 direction, drive the X2 feed device to move the contact probe (4) 0.5mm in the negative X2 direction, and then execute step C3. C5. Drive the Z2 feed device to make the contact probe (4) touch the two ends of the thread in the Z2 direction, and obtain the coordinate positions Z26 and Z27 of the two ends of the thread in the Z2 direction respectively. At this time, the thread root position Z28 is the average value of Z26 and Z27. Then drive the probe feed unit (5) to move to the zero coordinate position in the X2 and Z2 directions respectively.

4. The bolt measurement and rolling integrated processing method according to claim 1, characterized in that: In step E, the force gauge (13) is used to provide feedback on the contact between the rolling tool and the surface of the bolt round bar, establishing a radial in-situ compensation relationship between the rolling tool and the bolt, which includes the following steps: E1, the turret (14) rotates to make the root rolling tool (17) the working tool, and drives the X1 feed device to make the root rolling tool (17) contact the bolt thread surface in the X1 direction. At this time, the force gauge (13) feeds the signal back to the machine tool control system and the display unit (18). When the force value displayed by the display unit changes from 0, the position coordinate position X12 of the root rolling tool (17) in the X1 direction is recorded. Then the root rolling tool (17) is moved to the zero point coordinate position in the X1 direction. E2. The turret (14) rotates to make the relief groove rolling tool (15) the working tool. The X1 feed device is driven to make the relief groove rolling tool (15) contact the bolt thread surface in the X1 direction. At this time, the force gauge (13) feeds the signal back to the machine tool control system and the display unit (18). When the force value displayed by the display unit changes from 0, the X1 direction position coordinate X13 of the relief groove rolling tool (15) is recorded. Then the relief groove rolling tool (15) is moved to the zero point coordinate position in the X1 direction. E3, the turret (14) rotates to make the thread rolling tool (16) the working tool, and drives the X1 feed device to make the thread rolling tool (16) contact the bolt thread surface in the X1 direction. At this time, the force gauge (13) feeds the signal back to the machine tool control system and the display unit (18). When the force value displayed by the display unit changes from 0, the X1 direction position coordinate X14 of the thread rolling tool (16) is recorded. Then the turret feed unit (12) is driven to move to the zero point coordinate position of the machine tool in the X1 and Z1 directions. E4. Calculate the bolt diameters D2 and X12, X13, and X14 to establish the radial compensation relationship R6 between the root rolling tool (17) and the bolt, the radial compensation relationship R7 between the relief groove rolling tool (15) and the bolt, and the radial compensation relationship R8 between the thread rolling tool (16) and the bolt. Then, R6 = X12 - D2 / 2, R7 = X13 - D2 / 2, and R8 = X14 - D2 / 2.

5. The bolt measurement and rolling integrated processing method according to claim 1, characterized in that: In step F, the bolt root, relief groove, and threads are rolled using different rolling tools, which involves the following steps: F1. The turret (14) rotates to make the root rolling tool (17) the working tool, and drives the turret feed unit (12) to move the root rolling tool (17) to point K to complete the tool setting. Then, the interpolation motion is performed to roll the root surface. The spindle speed is n1 and the axial feed is f. r1 After the rolling process is completed, the turret feed unit (12) moves to the origin position in the X1 and Z1 directions; F2. The turret (14) rotates to make the unscratching tool (15) the working tool. The turret feed unit (12) is driven to move the unscratching tool (15) to point M to complete the tool setting. Then, interpolation motion is performed to roll the unscratching surface. The spindle speed is n1 and the axial feed is f. r1 After the rolling process is completed, the turret feed unit (12) moves to the origin position in the X1 and Z1 directions; F3. The turret (14) rotates to make the thread rolling tool (16) the working tool, and drives the turret feed unit (12) to move the thread rolling tool to point N to complete the tool setting. Then, the thread interpolation motion is performed to roll the thread root surface. The spindle speed is n2 and the axial feed is f. r2 After the rolling process is completed, the turret feed unit (12) moves to the origin position in the X1 and Z1 directions.

6. The bolt measurement and rolling integrated processing method according to claim 1, characterized in that: In step F3, the maximum permissible spindle speed n2 is 0-100 r / min, and the axial feed rate f r2 = Thread pitch P.

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