阅读说明：本技术 一种滚珠丝杆螺母复合磨削装置 (Ball screw nut composite grinding device ) 是由 张群 杨才军 邹兴 于 2020-12-15 设计创作，主要内容包括：本发明涉及磨削技术领域,具体是涉及一种滚珠丝杆螺母复合磨削装置,包括有：自旋转支撑,其内圈设置能够同轴转动的转动圈；三爪中段夹持器,设置在转动圈中,且其内圈有三个抵接块；预呈料定位器,设置在自旋转支撑两侧,所述预呈料定位器工作端设置开口朝上用于放置丝杆螺母的V槽托板,所述V槽托板相对三爪中段夹持器外端倾斜设置有用于抵接丝杆螺母两端的端面抵接片；丝杆平移驱动器,所述丝杆平移驱动器工作端移动方向沿三爪中段夹持器径向设置在自旋转支撑两端,其工作端依次设置有同轴向朝向三爪中段夹持器的定位测量机构、内周面磨削机构、端面磨削机构、抵接旋转机构和外周面磨削机器人,本装置加工精度高。(The invention relates to the technical field of grinding, in particular to a ball screw nut composite grinding device, which comprises: the self-rotating support is provided with a rotating ring which can coaxially rotate in the inner ring; the three-jaw middle section clamp holder is arranged in the rotating ring, and the inner ring of the three-jaw middle section clamp holder is provided with three abutting blocks; the pre-material positioner is arranged on two sides of the self-rotation support, a V-groove supporting plate with an upward opening is arranged at the working end of the pre-material positioner and used for placing the screw nut, and end surface abutting pieces used for abutting against two ends of the screw nut are obliquely arranged on the V-groove supporting plate relative to the outer end of the three-jaw middle section clamp holder; the working end of the screw rod translation driver is sequentially provided with a positioning measuring mechanism, an inner peripheral surface grinding mechanism, an end surface grinding mechanism, a butt rotating mechanism and an outer peripheral surface grinding robot which are coaxially arranged towards the three-jaw middle section clamp holder, and the device is high in machining precision.)

1. The utility model provides a compound grinding device of ball screw nut which characterized in that, including:

the self-rotating support (1), the axis of the self-rotating support (1) is vertically arranged, and the inner ring of the self-rotating support is provided with a rotating ring (1a) capable of coaxially rotating;

the three-jaw middle-section clamp holder (2) is coaxially and fixedly arranged in the rotating ring (1a), and three abutting blocks (2a) which synchronously move along the radial direction are uniformly distributed on the inner ring of the three-jaw middle-section clamp holder (2);

the pre-forming material positioner (3) is characterized in that the working end of the pre-forming material positioner (3) inclines towards the axis of the three-jaw middle section clamp holder (2) and is arranged on two sides of the self-rotating support (1), the working end of the pre-forming material positioner (3) is provided with a V-shaped groove support plate (3a) with an upward opening and used for placing a screw nut, the V-shaped groove support plate (3a) is obliquely provided with end surface abutting pieces (3b) used for abutting two ends of the screw nut relative to the outer end of the three-jaw middle section clamp holder (2), and in a working state, the working end of the pre-forming material positioner (3) inclines towards the axis of the three-jaw middle section clamp holder (2) and moves to two sides of the;

screw rod translation driver (4), screw rod translation driver (4) working end moving direction radially sets up at autogyration support (1) both ends along three-jaw middle section holder (2), screw rod translation driver (4) working end sets gradually location measuring mechanism (4a), inner peripheral surface grinding mechanism (4b), end face grinding mechanism (4c), butt rotary mechanism (4d) and outer peripheral face grinding robot (4e) of coaxial orientation three-jaw middle section holder (2).

2. A ball screw nut compound grinding apparatus according to claim 1, characterized in that the three-jaw mid-section holder (2) further comprises:

the fixing ring (2b) is coaxially and fixedly arranged at the inner ring of the fixing ring (1 b 0), three sliding grooves (2b1) arranged along the radial direction are uniformly distributed in the fixing ring (2b), the abutting block (2a) is arranged in the sliding groove (2b1) in a sliding mode along the radial direction, and a sliding hole (2a1) is formed in one end, facing the axis of the fixing ring (2b), of the abutting block (2 a);

the internal thread sliding block (2c), the said internal thread sliding block (2c) is set up in the runner (2b1) in a manner of sliding radially;

the first fixing pin (2d) is fixedly arranged at the axial end, deviating from the fixing ring (2b), of the abutting block (2a) along the radial direction, and the first fixing pin (2d) penetrates through the second fixing pin (2c) along the radial direction and is in sliding fit with the second fixing pin;

the first spring (2e), the said first spring (2e) is coaxially fitted over the first fixed pin (2d), and both ends of the said first spring (2e) abut against and abut against the block (2a) of the abutting joint and opposite ends of the fixed ring (2b) separately;

the threaded rod (2f) is rotatably arranged in the sliding groove (2b1) along the radial direction, the threaded rod (2f) is screwed with the internal thread sliding block (2c) in a coaxial manner, and the sliding hole (2a1) is in coaxial sliding fit with the threaded rod (2 f);

the thread cutting device comprises a bevel gear (2g) and a bevel gear ring (2h), wherein the bevel gear (2g) is coaxially and fixedly arranged at the outer end of a threaded rod (2f), the bevel gear (2g) is coaxially and rotatably arranged on the periphery of a fixing ring (2b), and the axes of the bevel gear (2g) and the bevel gear ring (2h) are vertical and are meshed with each other;

the output shaft of the servo motor (2i) is coaxially and fixedly connected with the outer end of a threaded rod (2 f).

3. A ball screw nut compound grinding device according to claim 1, characterized in that the pre-form positioner (3) further comprises:

the working end of the multi-rod cylinder (3c) is arranged at the top ends of two sides of the self-rotating support (1) towards the axis of the three-jaw middle section clamp holder (2) in an inclined mode;

the push plate (3d) is fixedly connected with the working end of the multi-rod cylinder (3 c);

lifting member (3e) are adjusted to manual formula lead screw, lifting member (3e) working end is adjusted to manual formula lead screw removes along vertical direction and sets up in push pedal (3d) one side, and V groove layer board (3a) is fixed to be set up at manual formula lead screw adjustment lifting member (3e) working end.

4. A ball screw nut compound grinding device according to claim 1, characterized in that the abutment rotating mechanism (4d) comprises:

the working end of the rotating machine (4d1) is arranged at the working end of the screw rod translation driver (4) and faces to the three-jaw middle section clamp holder (2) in the same axial direction;

the axial compressor (4d2), the axial compressor (4d2) is coaxially and fixedly connected with the working end of the rotating machine (4d 1);

the positioning cone (4d3), the tip of the positioning cone (4d3) faces the three-jaw middle section gripper (2) and is coaxially arranged at the working end of the axial compressor (4d2), and the periphery of the axial compressor (4d2) is coaxially and fixedly provided with a fixed ring (4d4) relative to the end of the axial compressor (4d 2);

an abutting ring (4d5), wherein the abutting ring (4d5) is coaxially and slidably matched with the fixing ring (4d4) through a second fixing pin (4d6), and the abutting ring (4d5) is positioned at the outer ring of the tip of the positioning cone (4d 3);

the second spring (4d7), the second spring (4d7) is coaxially sleeved on the abutting ring (4d5), and two ends of the second spring (4d7) abut against the opposite ends of the fixed ring (4d4) and the abutting ring (4d5) respectively.

5. The ball screw nut compound grinding device as claimed in claim 1, characterized in that the positioning cone (4d3) has a first rib (4d8) distributed around the periphery of the tip of the positioning cone along the conical direction.

6. The ball screw nut compound grinding device as claimed in claim 2, characterized in that the abutting block (2a) is further provided with a first limiting groove (2a2) at both sides along the radial direction of the fixing ring (2b), and the sliding groove (2b1) is provided with a first limiting block (2b2) at both sides opposite to the axial end thereof, wherein the first limiting block is slidably matched with the 2c 2.

7. The ball screw nut compound grinding device as claimed in claim 2, characterized in that the slide hole (2a1) is also coaxially and fixedly provided with a fixing rod (2a3), and the threaded rod (2f) is coaxially provided with a stabilizing hole (2f1) coaxially and slidably engaged with the fixing rod (2a 3).

8. A ball screw nut compound grinding device according to claim 2, characterized in that the abutment block (2a) is equally spaced from the axial end of the fixed ring (2b) by second ribs (2a4) along its axial direction.

9. The ball screw nut composite grinding device as claimed in claim 2, characterized in that the two sides of the sliding hole (2a1) are provided with fixing rods (2a3) along the radial direction, and the two ends of the internal thread sliding block (2c) are provided with second limiting blocks (2c1) which slide along the radial direction of the fixing rods (2a 3).

10. The ball screw nut compound grinding device as claimed in claim 2, characterized in that the periphery of the fixed ring (2b) is provided with a limiting edge (2b4) and a limiting ring (2b5) for limiting the axial movement of the bevel gear ring (2h), and the opposite side of the limiting edge (2b4) and the limiting ring (2b5) are in coaxial clearance fit with the two ends of the bevel gear ring (2 h).

Technical Field

The invention relates to the technical field of grinding, in particular to a ball screw nut composite grinding device.

Background

The traditional ball screw nut grinding method is characterized in that the structure is simple, the traditional machine tool can be realized, but two devices are needed to finish the grinding, and the coaxiality of the internal thread and the external diameter of the ball screw nut can be reduced due to secondary clamping, so that the ball screw nut is not suitable for ball screw nuts with ultrahigh requirements.

With the rapid development of the manufacturing industry level and the improvement of various artificial land costs in recent years, the demand of a composite efficient processing method is stronger and stronger, so that the traditional processing device cannot meet the market demand.

Chinese patent CN201821612949.7 discloses a ball screw nut composite grinding device, which comprises a machine body, wherein the machine body is provided with a workpiece carriage unit, an external diameter end face grinding wheel spindle carriage unit, an internal thread grinding wheel spindle carriage unit and an internal thread grinding wheel finishing unit; a workpiece drive unit; an outer diameter end face grinding wheel dressing unit; an outer diameter end face grinding spindle unit; an internal thread grinding spindle unit; the measuring unit is arranged on the internal thread grinding wheel shaft unit; the workpiece rotary circular grating is arranged at the front end of the workpiece driving unit; the workpiece carriage linear grating is arranged at the front end of the workpiece carriage unit.

The device can not adapt to lead screw nuts with different structures and can not effectively grind the periphery of the lead screw nut, namely the end surface of the other side.

Disclosure of Invention

In order to solve the technical problem, the composite grinding device for the ball screw nut is provided, and the technical scheme solves the problem of grinding the composite inner periphery and the end face of the screw nut.

In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:

a ball screw nut composite grinding device comprises: the self-rotating support is vertically arranged, and the inner ring of the self-rotating support is provided with a rotating ring capable of coaxially rotating; the three-jaw middle section gripper is coaxially and fixedly arranged in the rotating ring, and three abutting blocks which synchronously move along the radial direction are uniformly distributed on the inner ring of the three-jaw middle section gripper; the pre-material-forming positioner is arranged on two sides of the self-rotating support in a manner that the working end of the pre-material-forming positioner inclines towards the axis of the three-jaw middle-section clamp holder, the working end of the pre-material-forming positioner is provided with a V-groove supporting plate with an upward opening for placing a screw rod nut, the V-groove supporting plate is obliquely provided with end surface abutting pieces for abutting against two ends of the screw rod nut relative to the outer end of the three-jaw middle-section clamp holder, and the working end of the pre-material-forming positioner inclines towards the axis of the three-jaw middle-section clamp holder and moves to two sides of; the working end of the screw rod translation driver is sequentially provided with a positioning measuring mechanism, an inner peripheral surface grinding mechanism, an end surface grinding mechanism, a butt rotating mechanism and an outer peripheral surface grinding robot, wherein the positioning measuring mechanism, the inner peripheral surface grinding mechanism, the end surface grinding mechanism, the butt rotating mechanism and the outer peripheral surface grinding robot are coaxially arranged towards the three-jaw middle section holder.

Preferably, the three-jaw mid-section gripper further comprises: the fixed ring is coaxially and fixedly arranged on the inner ring, three sliding grooves which are arranged along the radial direction are uniformly distributed in the fixed ring, the abutting block is arranged in the sliding grooves in a sliding mode along the radial direction, and a sliding hole is formed in one end, facing the axis of the fixed ring, of the abutting block; the internal thread sliding block is arranged in the sliding groove in a sliding mode along the radial direction; the first fixing pin is fixedly arranged at the axial end of the abutting block deviating from the fixed ring along the radial direction, and penetrates through the first fixing pin along the radial direction and is in sliding fit with the first fixing pin; the first spring is coaxially sleeved on the first fixing pin, and two ends of the first spring are respectively abutted against opposite ends of the abutting block and the fixing ring; the threaded rod is rotatably arranged in the sliding groove along the radial direction, the threaded rod is screwed with the internal thread sliding block in a coaxial threaded manner, and the sliding hole is in coaxial sliding fit with the threaded rod; the bevel gear and the bevel gear ring are coaxially and fixedly arranged at the outer end of the threaded rod, the bevel gear is coaxially and rotatably arranged at the periphery of the fixing ring, and the axes of the bevel gear and the bevel gear ring are vertical and are mutually meshed; and the output shaft of the servo motor is coaxially and fixedly connected with the outer end of a threaded rod.

Preferably, the pre-presenting positioner further comprises: the working end of the multi-rod cylinder is arranged at the top ends of two sides of the self-rotating support towards the axis of the three-jaw middle section clamp holder in an inclined mode; the push plate is fixedly connected with the working end of the multi-rod cylinder; the lifter is adjusted to manual formula lead screw, the lifter working end is adjusted to manual formula lead screw is removed along vertical direction and is set up in push pedal one side, and the fixed setting of V groove tray is adjusted the lifter working end at manual formula lead screw.

Preferably, the abutting rotation mechanism comprises: the working end of the rotating machine is coaxially arranged at the working end of the screw rod translation driver towards the three-jaw middle section holder; the axial compressor is coaxially and fixedly connected with the working end of the rotating machine; the tip end of the positioning cone faces the three-jaw middle section clamp holder and is coaxially arranged at the working end of the axial telescopic machine, and a fixing ring is coaxially and fixedly arranged on the periphery of the axial telescopic machine relative to the end of the axial telescopic machine; the abutting ring is coaxially and slidably matched with the fixing ring through a second fixing pin, and the abutting ring is positioned on the outer ring of the tip end of the positioning cone; the second spring is coaxially sleeved on the abutting ring, and two ends of the second spring are respectively abutted to opposite ends of the fixed ring and the abutting ring.

Preferably, the periphery of the tip of the positioning cone is uniformly provided with first convex strips along the cone direction.

Preferably, the butt joint piece both sides still are provided with first spacing groove along solid fixed ring is radial, the spout both sides relative its axis end be provided with sliding fit's first stopper.

Preferably, a fixing rod is coaxially and fixedly arranged in the sliding hole, and a stabilizing hole which is coaxially and slidably matched with the fixing rod is coaxially arranged in the threaded rod.

Preferably, the abutting block is uniformly distributed with second convex strips along the axial direction of the abutting block relative to the axial end of the fixed ring at equal intervals.

Preferably, the sliding hole both sides still are provided with the dead lever along radial, and the internal thread sliding block both ends are provided with the second stopper along dead lever radial slip.

Preferably, the periphery of the fixing ring is provided with a limiting edge and a limiting ring for limiting the bevel gear ring to move along the axial direction, and the limiting edge is in coaxial clearance fit with the two ends of the bevel gear ring on the opposite side of the limiting ring.

Compared with the prior art, the invention has the beneficial effects that:

the three-jaw middle section clamp is used for clamping the central vertical surface of the screw rod nut along the horizontal direction, so that the end surface and the inner periphery of the screw rod nut are convenient to grind, the screw rod nut can be coaxially abutted and repositioned through the abutting rotating mechanism, the outer periphery of the screw rod nut is convenient to process, and specifically, during work, the multi-rod air cylinder is started, so that the working end of the multi-rod air cylinder drives the V-groove supporting plate to obliquely extend out towards the axial direction of the three-jaw middle section clamp, and the opening of the V-groove supporting plate is upwards positioned at; horizontally placing the thread axis of the screw rod on the opening of the V-groove supporting plate, and enabling the end surface abutting piece to abut against two ends of the screw rod nut, so that the abutting piece and the screw rod nut are concentric to form a vertical surface; starting a servo motor to enable the internal thread sliding block to drive the abutting block to slide along the radial direction, and enabling the abutting block to overcome the elastic force of the first spring to abut against the outer periphery of the center of the screw nut along the radial direction, namely, the screw nut is coaxially fixed relative to the three-jaw middle section clamp; the multi-rod cylinder drives the V-groove supporting plate and the end face abutting piece to reset, namely the V-groove supporting plate and the end face abutting piece are separated from the screw nut, so that the screw nut and the three-jaw middle section clamp are coaxial and have the same vertical surface, namely pore channels and end faces on two sides of screw threads of the screw are not shielded; starting the lead screw translation driver to enable the positioning and measuring mechanism to move to be coaxial with the lead screw nut so as to enable the positioning and measuring mechanism to be in contact with the positioning surface of the lead screw nut and automatically measure the processing starting point of the internal thread, and after the measurement is finished, starting the lead screw translation driver again to enable the inner peripheral surface grinding mechanism to be coaxial with the lead screw thread so as to grind the lead screw thread through the inner peripheral surface grinding mechanism; starting the self-rotating support, so that the rotating ring drives the three-jaw middle section clamp to coaxially rotate, namely the three-jaw middle section clamp drives the screw rod nut to coaxially rotate, and then grinding the threaded end face of the screw rod through the end face grinding mechanism; when the outer periphery of the screw thread of the screw rod needs to be ground, the axial telescopic machine is started, the working end of the axial telescopic machine drives the positioning cones to be coaxially inserted at two ends of the screw rod nut, meanwhile, the positioning correction is carried out on the screw rod nut, the three-jaw middle section clamping device is started, the abutting block is enabled to reset and is separated from the outer periphery of the screw rod nut, the outer periphery of the adjacent side of the abutting rotary mechanism is not shielded, a grinding robot for the outer periphery of the abutting rotary mechanism is started, grinding operation is carried out on the outer periphery of the screw rod nut, the abutting rotary mechanism is started in the process, the two ends of the screw rod nut can be coaxially rotated in the abutting state, the outer periphery of the screw rod nut is convenient to evenly grind, compared with the existing equipment, the.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a perspective view of the three-jaw mid-section clamp of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a front view of the three-jaw mid-section clamp of the present invention;

FIG. 5 is a cross-sectional view at section B-B of FIG. 4;

FIG. 6 is an enlarged view of a portion of FIG. 5 at C;

FIG. 7 is a side view of the three-pronged mid-section clamp of the present invention;

FIG. 8 is a cross-sectional view at section D-D of FIG. 7;

FIG. 9 is an enlarged view of a portion of FIG. 8 at E;

fig. 10 is an axial cross-sectional view of the lead screw translation driver of the present invention.

The reference numbers in the figures are:

1-self-rotating support; 1 a-a rotating ring;

2-a three-jaw middle-section clamp holder; 2 a-a butt block; 2a 1-sliding hole; 2a 2-first retaining groove; 2a 3-fixation bar; 2a 4-second rib; 2 b-a fixed ring; 2b 1-chute; 2b 2-a first stopper; 2b 3-a second retaining groove; 2b 4-stop edge; 2b 5-stop collar; 2 c-internal thread sliding block; 2c 1-a second stopper; 2 d-a first fixation pin; 2 e-a first spring; 2 f-threaded rod; 2f 1-stabilization well; 2 g-bevel gear; 2 h-bevel gear ring; 2 i-a servo motor;

3-pre-material presentation positioner; 3a-V groove supporting plates; 3 b-end face abutment tab; 3 c-a multi-rod cylinder; 3 d-push plate; 3 e-manual screw rod adjusting lifting piece;

4-screw translation driver; 4 a-positioning measuring mechanism; 4 b-inner peripheral surface grinding mechanism; 4 c-an end face grinding mechanism; 4 d-an abutment rotation mechanism; 4d 1-rotating machine; 4d 2-axial compressor; 4d 3-locating cone; 4d 4-retaining ring; 4d 5-abutment ring; 4d6 — second retaining pin; 4d7 — second spring; 4d 8-first rib; 4 e-peripheral surface grinding robot.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

Referring to fig. 1, a ball screw nut compound grinding apparatus includes:

the self-rotating support 1 is vertically arranged on the axis of the self-rotating support 1, and a rotating ring 1a capable of coaxially rotating is arranged in the inner ring of the self-rotating support 1;

the three-jaw middle section gripper 2 is coaxially and fixedly arranged in the rotating ring 1a, and three abutting blocks 2a which synchronously move along the radial direction are uniformly distributed on the inner ring of the three-jaw middle section gripper 2;

the pre-material-forming positioner is characterized by comprising a pre-material-forming positioner 3, wherein the working end of the pre-material-forming positioner 3 is arranged at two sides of a self-rotating support 1 in an inclined manner towards the axis of a three-jaw middle section holder 2, the working end of the pre-material-forming positioner 3 is provided with a V-shaped groove supporting plate 3a with an upward opening for placing a screw nut, the V-shaped groove supporting plate 3a is obliquely provided with end surface abutting pieces 3b for abutting against two ends of the screw nut relative to the outer end of the three-jaw middle section holder 2, and the working end of the pre-material-forming positioner 3 is inclined towards the axis of the three-jaw middle section holder 2 to move;

the automatic grinding device comprises a screw rod translation driver 4, wherein the moving direction of the working end of the screw rod translation driver 4 is radially arranged at two ends of a self-rotating support 1 along a three-jaw middle section clamp holder 2, and the working end of the screw rod translation driver 4 is sequentially provided with a positioning measuring mechanism 4a, an inner peripheral surface grinding mechanism 4b, an end surface grinding mechanism 4c, a butt rotating mechanism 4d and an outer peripheral surface grinding robot 4e which are coaxially arranged towards the three-jaw middle section clamp holder 2.

When the device works, the working end of the pre-material-forming positioner 3 is inclined and extends out towards the axial direction of the three-jaw middle-section clamp holder 2, so that the opening of the V-shaped groove supporting plate 3a is upwards positioned at two sides of the inner ring of the three-jaw middle-section clamp holder 2;

horizontally placing the screw thread axis of the screw rod on the opening of the V-groove supporting plate 3a, and enabling the end surface abutting piece 3b to abut against two ends of the screw rod nut, so that the abutting piece 2a and the screw rod nut are concentric to form a vertical surface;

starting the three-jaw middle-section clamp holder 2 to enable the abutting block 2a to abut against the outer periphery of the center of the feed screw nut along the radial direction, namely, the feed screw nut is coaxially fixed relative to the three-jaw middle-section clamp holder 2;

the working end of the pre-material positioner 3 drives the V-groove supporting plate 3a and the end surface abutting piece 3b to reset, namely the V-groove supporting plate 3a and the end surface abutting piece 3b are separated from the screw rod nut, so that the screw rod nut and the three-jaw middle section clamp holder 2 are coaxial and have the same vertical surface, namely pore passages and end surfaces on two sides of screw threads of the screw rod are not shielded;

starting the lead screw translation driver 4 to enable the positioning measurement mechanism 4a to move to be coaxial with the lead screw nut so as to enable the positioning measurement mechanism to be in contact with the positioning surface of the lead screw nut and automatically measure the processing starting point of the internal thread, and after the measurement is finished, starting the lead screw translation driver 4 again to enable the inner peripheral surface grinding mechanism 4b to be coaxial with the lead screw thread so as to grind the lead screw thread through the inner peripheral surface grinding mechanism 4 b; starting the self-rotating support 1, so that the rotating ring 1a drives the three-jaw middle section clamp holder 2 to coaxially rotate, namely the three-jaw middle section clamp holder 2 drives the screw rod nut to coaxially rotate, and then grinding the threaded end face of the screw rod through the end face grinding mechanism 4 c;

when the outer periphery of the screw thread of the screw rod needs to be ground, the abutting rotary mechanism 4d is started, the working end of the abutting rotary mechanism is enabled to be coaxially abutted against two ends of the screw nut, meanwhile, the positioning correction is carried out on the screw nut, the three-jaw middle section clamp holder 2 is started, the abutting block 2a is reset to be separated from the outer periphery of the screw nut, so that the outer periphery of the screw nut is not shielded, the outer periphery grinding robot 4e on the adjacent side of the abutting rotary mechanism 4d is started, so that the outer periphery of the screw nut is ground, in the process, the abutting rotary mechanism 4d is started, two ends of the screw nut can coaxially rotate in the abutting state, and therefore the outer periphery;

the self-rotating support 1, the positioning and measuring mechanism 4a, the inner peripheral surface grinding mechanism 4b, the end surface grinding mechanism 4c and the outer peripheral surface grinding robot 4e are mature in the prior art and will not be described here.

As shown in fig. 6 and 9, the three-jaw mid-section clamp 2 further includes:

the fixing ring 2b is coaxially and fixedly arranged at the inner ring of the fixing ring 2b, three sliding grooves 2b1 which are arranged along the radial direction are uniformly distributed in the fixing ring 2b, the abutting block 2a is arranged in the sliding groove 2b1 in a sliding mode along the radial direction, and one end, facing the axis of the fixing ring 2b, of the abutting block 2a is provided with a sliding hole 2a 1;

an internal thread sliding block 2c, wherein the internal thread sliding block 2c is arranged in the sliding groove 2b1 in a sliding way along the radial direction;

the first fixing pin 2d is fixedly arranged at the axial end of the abutting block 2a deviating from the fixing ring 2b along the radial direction, and the first fixing pin 2d penetrates through the second fixing pin 2c along the radial direction and is in sliding fit with the second fixing pin;

the first spring 2e is coaxially sleeved on the first fixing pin 2d, and two ends of the first spring 2e are respectively abutted against opposite ends of the abutting block 2a and the fixing ring 2 b;

the threaded rod 2f is rotatably arranged in the sliding groove 2b1 along the radial direction, the threaded rod 2f is screwed with the internal thread sliding block 2c in a coaxial manner, and the sliding hole 2a1 is in coaxial sliding fit with the threaded rod 2 f;

the bevel gear 2g and the bevel gear ring 2h, the bevel gear 2g is coaxially and fixedly arranged at the outer end of the threaded rod 2f, the bevel gear 2g is coaxially and rotatably arranged on the periphery of the fixing ring 2b, and the axes of the bevel gear 2g and the bevel gear ring 2h are vertical and are mutually meshed;

and an output shaft of the servo motor 2i is coaxially and fixedly connected with the outer end of a threaded rod 2 f.

When the screw threads of the screw rod are positioned and placed on the pre-presenting positioner 3, the servo motor 2i is started, an output shaft of the servo motor drives the threaded rod 2f to coaxially rotate, the bevel gear 2g drives the bevel gear ring 2h to synchronously rotate, namely, the threaded rods 2f in all the sliding grooves 2b1 are coaxially rotated, the internal thread sliding block 2c is screwed with the coaxial threads of the threaded rod 2f, namely, the internal thread sliding block 2c drives the abutting block 2a to radially move through the first fixing pin 2d, namely, the sliding hole 2a1 is separated from the threaded rod 2f, and the abutting block 2a abuts against the periphery of the screw nut, so that the screw nut is conveniently and synchronously positioned and clamped, and the inner periphery and the end face are conveniently processed.

As shown in fig. 2 and 3, the pre-feeding positioner 3 further includes:

the working end of the multi-rod cylinder 3c is arranged at the top ends of two sides of the self-rotating support 1 towards the axis of the three-jaw middle section clamp holder 2 in an inclined mode;

the push plate 3d is fixedly connected with the working end of the multi-rod cylinder 3 c;

the lifter 3e is adjusted to manual formula lead screw, the lifter 3e working end is adjusted to manual formula lead screw removes along vertical direction and sets up in push pedal 3d one side, and the fixed lifting 3e working end is adjusted at manual formula lead screw that sets up of V groove layer board 3 a.

Start multi-rod cylinder 3c, make its working end pass through push pedal 3d slope promotion V groove layer board 3a and terminal surface butt piece 3b, thereby make screw-nut can the axis level place on V groove layer board 3a opening, and its tip and terminal surface butt piece 3b butt, thereby be convenient for 2 location centre gripping to screw-nut of three-jaw middle section holder, can adjust both sides V groove layer board 3a and terminal surface butt piece 3b height through manual formula lead screw regulation lifter 3e, thereby be convenient for adapt to the not unidimensional screw-nut in location.

As shown in fig. 10, the abutment rotation mechanism 4d includes:

the working end of the rotary machine 4d1 is coaxially arranged at the working end of the screw rod translation driver 4 towards the three-jaw middle section clamp 2;

the axial compressor 4d2, the axial compressor 4d2 is coaxially and fixedly connected with the working end of the rotating machine 4d 1;

the positioning cone 4d3, the tip of the positioning cone 4d3 is coaxially arranged at the working end of the axial compressor 4d2 towards the three-jaw middle section gripper 2, and the periphery of the axial compressor 4d2 is coaxially and fixedly provided with a fixed ring 4d4 relative to the end of the axial compressor 4d 2;

an abutting ring 4d5, wherein the abutting ring 4d5 is coaxially and slidably matched with a fixed ring 4d4 through a second fixed pin 4d6, and the abutting ring 4d5 is positioned at the outer ring of the tip of the positioning cone 4d 3;

the second spring 4d7, the second spring 4d7 is coaxially sleeved on the abutting ring 4d5, and two ends of the second spring 4d7 abut against the opposite ends of the fixed ring 4d4 and the abutting ring 4d5 respectively.

The axial telescopic machine 4d2 is started, the working end of the axial telescopic machine drives the positioning cone 4d3 to be coaxially inserted at two ends of the screw nut, the abutting ring 4d5 overcomes the elastic abutting of the second spring 4d7 at the end face of the screw nut in the process, so that the screw thread can be coaxially corrected, the fixing ring 4d4 is used for being coaxially and slidably connected with the second fixing pin 4d6 through the second fixing pin 4d6, the rotating machine 4d1 is started, the screw nut can rotate coaxially under the coaxial abutting state at two ends, and the periphery of the screw nut can be uniformly ground.

As shown in FIG. 10, the positioning cones 4d3 have first convex strips 4d8 distributed around the tip of the positioning cones along the conical direction.

The first protruding strip 4d8 can prevent the screw nut from rotating coaxially relative to the positioning cone 4d3 when the positioning cone 4d3 is coaxially inserted into the screw nut.

As shown in fig. 6 and 9, first limiting grooves 2a2 are further provided on both sides of the abutment block 2a along the radial direction of the fixing ring 2b, and first limiting blocks 2b2 slidably engaged with 2c2 are provided on both sides of the sliding groove 2b1 with respect to the axial end thereof.

The first stopper 2b2 is vertically slidably fitted in the first stopper groove 2a2 along the radial direction, so that the abutting block 2a is prevented from sliding off the fixing ring 2b along the radial direction, i.e., the structure is more stable.

As shown in fig. 6 and 9, the sliding hole 2a1 is also coaxially and fixedly provided with a fixed rod 2a3, and the threaded rod 2f is coaxially provided with a stabilizing hole 2f1 coaxially and slidably engaged with the fixed rod 2a 3.

Through the coaxial sliding fit of dead lever 2a3 and stability hole 2f1, thereby make the piece 2a of butt joint more stable when relative break away from threaded rod 2f, thus facilitate location and butt joint.

As shown in fig. 6 and 9, the second protrusions 2a4 are uniformly distributed along the axial direction of the abutment block 2a at equal intervals relative to the axial end of the fixed ring 2 b.

When the abutment block 2a abuts on the outer periphery of the lead screw nut coaxial with the fixed ring 2b via the second projecting strip 2a4, the lead screw nut is less likely to want to rotate the fixed ring 2b in the circumferential direction, thereby facilitating grinding.

As shown in fig. 6 and 9, fixing rods 2a3 are further provided at both sides of the sliding hole 2a1 in the radial direction, and second stoppers 2c1 which slide in the radial direction of the fixing rods 2a3 are provided at both ends of the internal thread sliding block 2 c.

By making the second stopper 2c1 slide-fit with the fixed lever 2a3 in the radial direction, the internally threaded slide block 2c is made more stable when sliding relative to the fixed ring 2 b.

As shown in fig. 6 and 9, the periphery of the fixing ring 2b is provided with a limiting edge 2b4 and a limiting ring 2b5 for limiting the axial movement of the bevel gear ring 2h, and the limiting edge 2b4 is in coaxial clearance fit with two ends of the bevel gear ring 2h on the opposite side of the limiting ring 2b 5.

The bevel gear ring 2h can be limited to be coaxially limited on the fixing ring 2b through the limiting edge 2b4 and the limiting ring 2b5, so that the bevel gear ring 2h can coaxially rotate relative to the fixing ring 2b, even if the abutting block 2a synchronously moves along the radial direction relative to the fixing ring 2b, and positioning and clamping are facilitated.

The working principle of the invention is as follows:

the device realizes the functions of the invention through the following steps, thereby solving the technical problems provided by the invention:

firstly, during work, starting a multi-rod cylinder 3c, so that a working end of the multi-rod cylinder drives a V-groove supporting plate 3a to incline and extend out towards the axis direction of a three-jaw middle-section clamp holder 2, and an opening of the V-groove supporting plate 3a is upwards positioned at two sides of an inner ring of the three-jaw middle-section clamp holder 2;

horizontally placing the thread axis of the screw rod on the opening of the V-groove supporting plate 3a, and enabling the end surface abutting piece 3b to abut against two ends of the screw rod nut, so that the abutting piece 2a and the screw rod nut are concentric to form a vertical surface;

step three, starting the servo motor 2i to enable the internal thread sliding block 2c to drive the abutting block 2a to slide along the radial direction, and enabling the abutting block 2a to overcome the elastic force of the first spring 2e to abut against the central peripheral position of the screw nut along the radial direction, namely enabling the screw nut to be coaxially fixed relative to the three-jaw middle section clamp holder 2;

fourthly, the multi-rod cylinder 3c drives the V-groove supporting plate 3a and the end surface abutting piece 3b to reset, namely the V-groove supporting plate 3a and the end surface abutting piece 3b are separated from the screw nut, so that the screw nut and the three-jaw middle section clamp holder 2 are coaxial and have the same vertical surface, namely the pore passages and the end surfaces on the two sides of the screw thread of the screw rod are not shielded;

step five, starting the lead screw translation driver 4 to enable the positioning measurement mechanism 4a to move to be coaxial with the lead screw nut so as to enable the positioning measurement mechanism to be in contact with the positioning surface of the lead screw nut and automatically measure the processing starting point of the internal thread, and after the measurement is finished, starting the lead screw translation driver 4 again to enable the inner peripheral surface grinding mechanism 4b to be coaxial with the lead screw thread so as to grind the lead screw thread through the inner peripheral surface grinding mechanism 4 b;

step six, starting the self-rotating support 1, so that the rotating ring 1a drives the three-jaw middle section holder 2 to coaxially rotate, namely the three-jaw middle section holder 2 drives the screw rod nut to coaxially rotate, and then grinding the threaded end face of the screw rod through the end face grinding mechanism 4 c;

seventhly, when the outer periphery of the screw thread of the screw rod needs to be ground, the axial telescopic machine 4d2 is started, the working end of the axial telescopic machine drives the positioning cone 4d3 to be coaxially inserted at two ends of the screw nut, meanwhile, the positioning correction is carried out on the screw nut, the three-jaw middle section clamping device 2 is started, the abutting block 2a is reset and separated from the outer periphery of the screw nut, the outer periphery of the screw nut is enabled to be free of shielding, the grinding robot 4e for the outer periphery of the adjacent side of the abutting rotary mechanism 4d is started, grinding operation is carried out on the outer periphery of the screw nut, the abutting rotary mechanism 4d is started in the process, two ends of the screw nut can be enabled to coaxially rotate in the coaxial abutting state.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.