CN112959139A - Synchronous grinding method for workpiece with multiple inclined inner holes - Google Patents

Abstract

The invention discloses a synchronous grinding method for a workpiece with multiple inclined inner holes, and belongs to the field of machining. The device includes: the supporting seat is provided with a guide sliding chute; the grinding device comprises a grinding shaft, a first supporting block and two second supporting blocks, wherein the two second supporting blocks are symmetrically arranged on two sides of the first supporting block, the two second supporting blocks are slidably arranged in the guide sliding groove, the grinding shaft is fixedly arranged on each of the first supporting block and the second supporting block, an included angle is formed between the grinding shaft on each second supporting block and the grinding shaft on the first supporting block, the grinding shafts on the two second supporting blocks are symmetrically arranged along the grinding shaft on the first supporting block, and a grinding head is arranged at one end of each grinding shaft, which is far away from the first supporting block and/or the second supporting block, and is used for grinding an inner hole of a workpiece; and the electric telescopic rod is used for driving the supporting seat to move. The device has the advantages of simple structure, low single machine cost, no need of complex control process, only need of clamping the workpiece, synchronous grinding of multiple inner holes and improvement of grinding efficiency.

Description

Synchronous grinding method for workpiece with multiple inclined inner holes

Technical Field

The invention relates to the field of machining, in particular to a method for synchronously grinding a workpiece with multiple inclined inner holes.

Background

In the field of product processing, processing inner holes of products is a common processing mode. For some precision parts, the precision size and the surface roughness of the inner hole are all required to be higher. Usually, for external dimensions, such as the outer diameter of a rod or a component, which are easy to machine, dimensional accuracy can be effectively ensured by a grinding machine. However, for the inner hole, feeding is inconvenient to control, and the machining allowance is small, so that the product is unqualified easily due to the problems of improper feeding control, residual burrs after machining and the like during finish machining. The traditional equipment such as through hole grinding machine, hole burnishing machine, the unit is with high costs, and the operating efficiency is lower. To the accurate part of minor diameter, also require higher to the precision of grinding the axle, grind the axle and diminish in the back diameter of grinding, need often change the grinding axle so that can guarantee the machining dimension, lead to batch production cost on the high side, production efficiency is lower.

As shown in FIG. 1, the number of the inner holes to be machined of the component is three, the three inner holes form an included angle with each other, and the two inner holes are symmetrically arranged about the middle inner hole. Three hole is owing to have the angle, and traditional lathe is owing to only have the unipolar, and single operation can only polish single direction, consequently can only single hole at every turn process, greatly reduced machining efficiency.

Disclosure of Invention

The invention provides a method for synchronously grinding a workpiece with multiple inclined inner holes, which can solve the problems of higher processing cost and lower processing efficiency in the prior art when a workpiece with multiple inner holes and included angles between the axial leads of the inner holes is polished.

A method of simultaneous grinding a workpiece having multiple inclined inner bores for grinding the inner bores of the workpiece, the workpiece having at least a first inner bore, a second inner bore and a third inner bore, the first and third inner bores arranged in a figure-eight pattern, the first and third inner bores arranged symmetrically about the second inner bore, the method comprising:

s1, providing a grinder, the grinder comprising:

the supporting seat is provided with a guide sliding chute;

the grinding device comprises a grinding shaft, a first supporting block and two second supporting blocks, the two second supporting blocks are symmetrically arranged on two sides of the first supporting block, the two second supporting blocks are slidably arranged in the guide sliding groove, the grinding shaft is fixedly arranged on each of the first supporting block and the second supporting block, an included angle is formed between the grinding shaft on the second supporting block and the grinding shaft on the first supporting block, the grinding shafts on the two second supporting blocks are symmetrically arranged along the grinding shaft on the first supporting block, and one end, away from the first supporting block and/or the second supporting block, of each grinding shaft is provided with a grinding head for grinding an inner hole of a workpiece;

the electric telescopic rod is used for driving the supporting seat to move;

s2, clamping the workpiece to enable the axis of the second inner hole to coincide with the axis of the grinding shaft on the first supporting block;

s3, starting the electric telescopic rod to extend and drive the supporting seat to move, wherein the supporting seat drives the first supporting block and the second supporting block to move so as to drive the grinding shaft to move towards the workpiece direction, so that the grinding shafts on the first supporting block enter the second inner hole and grind the second inner hole, the grinding shafts on the two second supporting blocks enter the first inner hole and the third inner hole respectively, and the first inner hole and the third inner hole are ground;

and S4, retracting the electric telescopic rod to drive the supporting seat to move backwards and drive the first supporting block and the second supporting block to move backwards, so that the grinding shaft is separated from the first inner hole, the second inner hole and the third inner hole.

Preferably, the grinding shaft comprises a position-giving section, a through-checking section and a through-stopping section, wherein the diameter of the position-giving section is smaller than the diameter of the inner hole of the workpiece, the outer diameter of the through-checking section is the lower limit value of the diameter of the inner hole of the workpiece, the outer diameter of the through-stopping section is the upper limit value of the diameter of the inner hole of the workpiece, and the diameter of the position-giving section is smaller than the diameter of the position-giving section.

Preferably, the grinding machine further comprises a yielding spring, the grinding section comprises a yielding section and a passing detection sleeve, the passing detection sleeve comprises a passing detection section and a stopping section, the diameter of the yielding section is smaller than the diameter of an inner hole of a workpiece, the outer diameter of the passing detection section is the lower limit value of the diameter of the inner hole of the workpiece, the outer diameter of the stopping section is the upper limit value of the diameter of the inner hole of the workpiece, and the diameter of the yielding section is smaller than the diameter of the passing detection section;

the general inspection sleeve is slidably arranged on the grinding shaft, one end of the abdicating spring is fixedly connected to the general member sleeve, and the other end of the abdicating spring is fixedly connected to the grinding shaft;

the S3 further includes:

s31, after the grinding shaft penetrates through the first inner hole, the second inner hole and the third inner hole simultaneously, the electric telescopic rod is continuously driven to drive the grinding shaft to move;

when the three through inspection sections respectively enter the first inner hole, the second inner hole and the third inner hole and the three through stopping sections respectively move backwards, the electric telescopic rod is controlled to drive the grinding shaft to move reversely to return to the initial position;

when three lead to when examining arbitrary one of section and moving backward, then control electric telescopic handle drives grinding axle reverse movement gets back to initial position after, repeats S2, until three lead to examine the section and all get into the hole, three when ending the section and moving backward respectively, control electric telescopic handle drives grinding axle reverse movement gets back to initial position.

Preferably, the grinding head comprises a supporting block, a connecting rod, an elastic pad and a grinding layer, the supporting block is connected to one end of the grinding shaft through the connecting rod, an air inlet hole is formed in the grinding shaft, connecting holes for connecting an external air source are formed in the first supporting block and the second supporting block, the air inlet hole penetrates into the connecting hole, an air inlet pipe is externally connected to the connecting hole, the elastic pad is of an annular structure, two ends of the elastic pad are respectively connected to the grinding shaft and the supporting block in a sealing mode, the grinding layer is wrapped on the outer side of the elastic pad, and when the air inlet hole is filled with air, the elastic pad drives the grinding layer to protrude outwards along the radial direction of the grinding shaft;

the S3 includes:

s31, connecting the two air inlet pipes with an external air source;

s32, start outside air supply and start electric telescopic handle makes electric telescopic handle extension and drive the supporting seat removes, the cushion under atmospheric pressure to the outside protruding deformation in week side of grinding axle drives the surface of wearing layer conflict at first hole, second hole and third hole is right first hole the second hole with the third hole is ground.

Preferably, the supporting block is provided with a pressure relief hole, and the axis of the pressure relief hole coincides with the axis of the grinding shaft.

Preferably, the grinding head is a grinding ring, the grinding ring comprises a ring body, a support shaft and a rotating blade, an air inlet hole is formed in the grinding shaft, connecting holes for connecting an external air source are formed in the first support block and the second support block, the air inlet hole penetrates into the connecting holes, an air inlet pipe is connected outside the connecting holes, and the front end of the air inlet hole is of a hollow structure and used for enabling air to flow out; the rotating blade is positioned in the air inlet, the ring body is positioned on the outer side of the grinding shaft, the supporting shaft is rotatably arranged at the front end of the grinding shaft, the rotating blade is fixedly arranged at one end of the supporting shaft positioned in the air inlet, and the ring body is fixedly arranged at one end of the supporting shaft positioned on the outer side of the grinding shaft;

an inflation cavity is formed in the ring body, the cross section of the ring body is of a C-shaped structure, the ring body is provided with an opening end and a bottom wall opposite to the opening end, the opening end faces the grinding shaft, a discharge hole is formed in the bottom wall, and the area of the projection of the discharge hole in the axial direction of the grinding shaft is smaller than the area of the projection of the opening end in the axial direction of the grinding shaft;

the periphery of the ring body is hermetically coated with an annular elastic pad, one side of the elastic pad, which is far away from the ring body, is fixedly provided with a grinding layer, and when the air inlet is filled with air, the elastic pad drives the grinding layer to bulge outwards along the radial direction of the ring body;

when the air inlet is filled with air, the rotating blades drive the ring body to rotate under the action of airflow;

the S3 includes:

s31, connecting the two air inlet pipes with an external air source;

s32, starting an external air source and starting the electric telescopic rod to extend the electric telescopic rod and drive the supporting seat to move, wherein the elastic pad protrudes outwards towards the periphery of the grinding shaft under the action of air pressure and deforms to drive the grinding layer to abut against the surfaces of the first inner hole, the second inner hole and the third inner hole so as to grind the first inner hole, the second inner hole and the third inner hole;

and S33, the airflow drives the rotating blades to rotate, and the rotating blades drive the ring body to rotate through the supporting shaft.

The invention provides a method for synchronously grinding a workpiece with multiple inclined inner holes, wherein an electric telescopic rod drives a supporting seat to move, a grinding shaft is driven to move forwards in the moving process of the supporting seat, the grinding shaft is driven to move in the advancing process of the supporting seat, the axis of the grinding shaft on a first supporting block is superposed with the axis of the electric telescopic rod, the grinding shaft on the first supporting block moves linearly, and the grinding shafts on two second supporting blocks are forced to move away from or close to each other under the guiding action of the inner holes after extending into the inner holes to be processed of the workpiece, and a stroke space is provided by a guide sliding chute, so that the inner holes with included angles can be synchronously ground; the device has simple structure and low cost of a single machine, only needs to clamp a workpiece without complex control process, and improves the grinding efficiency because multiple inner holes are synchronously ground.

Drawings

FIG. 1 is a schematic structural view of a part to be machined;

FIG. 2 is a schematic structural diagram of a method for synchronously grinding a workpiece with multiple inclined inner holes according to the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a first schematic view of a grinding spindle;

FIG. 5 is a second schematic structural view of the grinding spindle;

FIG. 6 is a schematic diagram illustrating an exemplary operating condition of the polishing head;

FIG. 7 is an enlarged view of a portion A of FIG. 6;

FIG. 8 is a schematic view of another embodiment of a polishing head;

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

fig. 10 is a partial enlarged view of fig. 9 at C.

Description of reference numerals:

10 grinding the shaft; 101 a polishing head; 102 a trailing bit section; 103, a general detection section; 104 a stop-pass section; 105 a yielding spring; 11 a support block; 111 a pressure relief vent; 20 a first support block; 21 a second support block; 30, supporting a seat; 31a guide chute; 40 grinding ring; 401 a drain hole; 402 inflating the chamber; 403 resilient pads; 404 a polishing layer; 405 a connecting rod; 41 supporting the shaft; 42 blades; 50 electric telescopic rod.

Detailed Description

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.

The first embodiment is as follows:

as shown in fig. 1, fig. 1 is a structure of a workpiece to be processed. The workpiece at least comprises a first inner hole, a second inner hole and a third inner hole, wherein the first inner hole and the third inner hole are arranged in a splayed manner, and the first inner hole and the third inner hole are symmetrically arranged relative to the second inner hole.

As shown in fig. 2 and 3, an embodiment of the present invention provides a method for synchronously grinding a workpiece with multiple inclined inner holes, the method comprising:

s1, providing a grinder, the grinder comprising:

the supporting seat 30 is provided with a guide sliding chute 31;

the grinding device comprises a grinding shaft 10, a first supporting block 20 and two second supporting blocks 21, wherein the two second supporting blocks 21 are symmetrically arranged at two sides of the first supporting block 20, the two second supporting blocks 21 are slidably arranged in the guide sliding grooves 31, the grinding shaft 10 is fixedly arranged on each of the first supporting block 20 and the second supporting block 21, the grinding shaft 10 on each of the second supporting blocks 21 and the grinding shaft 10 on each of the first supporting blocks 20 form an included angle, the grinding shafts 10 on the two second supporting blocks 21 are symmetrically arranged along the grinding shaft 10 on each of the first supporting blocks 20, and one end of each grinding shaft 10, which is far away from the first supporting block 20 and/or the second supporting block 21, is provided with a grinding head 101 for grinding an inner hole of a workpiece;

the electric telescopic rod 50 is used for driving the supporting seat 30 to move;

s2, clamping the workpiece to ensure that the axis of the second inner hole coincides with the axis of the grinding shaft 10 on the first supporting block 20;

s3, starting the electric telescopic rod 50, so that the electric telescopic rod 50 extends and drives the supporting seat 30 to move, the supporting seat 30 drives the first supporting block 20 and the second supporting block 21 to move and further drives the grinding shaft 10 to move towards the workpiece direction, so that the grinding shaft 10 on the first supporting block 20 enters the second inner hole and grinds the second inner hole, so that the grinding shafts 10 on the two second supporting blocks 21 enter the first inner hole and the third inner hole respectively, and the first inner hole and the third inner hole are ground;

s4, retracting the electric telescopic rod 50 to drive the supporting seat 30 to move backward and drive the first supporting block 20 and the second supporting block 21 to move backward, so that the grinding shaft 10 is separated from the first inner hole, the second inner hole and the third inner hole.

During operation, press from both sides the work piece tightly, make three grinding axle 10 respectively with the first hole of work piece, second hole and third hole are coaxial to be arranged, start electric telescopic handle 50, electric telescopic handle 50 drives supporting seat 30 and removes, supporting seat 30 drives grinding axle 10 and removes, the direction linear motion of grinding axle 10 towards the second hole in the middle of being located, and two grinding axle 10 that are located both sides get into first hole and third hole respectively after, receive the guide effect of first hole and third hole, drive second supporting shoe 21 and remove in direction spout 31, compensate the displacement that grinding axle 10 on the second supporting shoe 21 formed, thereby first hole to the work piece, second hole and third hole are polished. After the grinding shaft 10 penetrates through the first inner hole, the second inner hole and the third inner hole, the electric telescopic rod 50 is controlled to retract, and the grinding shaft 10 is driven to return to the initial position.

Example two:

on the basis of the first embodiment, during grinding, the machining allowance is small, the requirement on dimensional accuracy is high, frequent inspection is required after grinding, and machining and inspection efficiency is reduced, as shown in fig. 4, the grinding shaft 10 includes a yielding section 102, a through inspection section 103 and a through stopping section 104, the diameter of the yielding section 102 is smaller than the diameter of the inner hole of the workpiece, the outer diameter of the through inspection section 103 is the lower limit value of the diameter of the inner hole of the workpiece, the outer diameter of the through stopping section 104 is the upper limit value of the diameter of the inner hole of the workpiece, and the diameter of the yielding section 102 is smaller than the diameter of the through inspection section 103. In the grinding process, if the grinding size exceeds the through inspection section 103, the through inspection section 103 can enter, which indicates that the lower limit value of the size of the inner hole meets the requirement; the grinding size is smaller than the stop-through section 104, and the stop-through section 104 cannot enter, so that the upper limit value of the size of the inner hole meets the requirement, and the grinding size and the stop-through section meet the requirement at the same time, so that the size is qualified. Thus, detection can be achieved without shutdown.

In another embodiment, as shown in fig. 5, the polishing device further comprises a yielding spring 105, the polishing section comprises a yielding section 102 and a pass-through detection sleeve, the pass-through detection sleeve comprises a pass-through detection section 103 and a pass-through stop section 104, the diameter of the yielding section 102 is smaller than the diameter of the inner hole of the workpiece, the outer diameter of the pass-through detection section 103 is the upper limit value of the diameter of the inner hole of the workpiece, the outer diameter of the pass-through stop section 104 is the lower limit value of the diameter of the inner hole of the workpiece, and the diameter of the yielding section 102 is smaller than the diameter of; the checking sleeve is slidably arranged on the grinding shaft 10, one end of the abdicating spring 105 is fixedly connected to the through piece sleeve, and the other end is fixedly connected to the grinding shaft 10.

The S3 further includes:

s31, after the grinding shaft 10 penetrates through the first inner hole, the second inner hole and the third inner hole at the same time, continuously making the electric telescopic rod 50 drive the grinding shaft 10 to move;

after the three through inspection sections 103 enter the first inner hole, the second inner hole and the third inner hole respectively, and when the three through stopping sections 104 move backwards respectively, the electric telescopic rod 50 is controlled to drive the grinding shaft 10 to move reversely to return to the initial position;

when any one of the three through inspection sections 103 moves backwards, the electric telescopic rod 50 is controlled to drive the grinding shaft 10 to move reversely, and after the grinding shaft returns to the initial position, the step S2 is repeated until the three through inspection sections 103 all enter the inner hole, and when the three through stopping sections 104 move backwards respectively, the electric telescopic rod 50 is controlled to drive the grinding shaft 10 to move reversely and return to the initial position.

In operation, as the grinding is continuously performed, when all the pass-through sections 103 on the three grinding shafts 10 can pass through and all the pass-through sections 104 cannot pass through, the machining is qualified. When the workpiece is not machined in place, only the electric telescopic rod 50 needs to be controlled to retract reversely, and reciprocating grinding is achieved. In order to avoid the damage caused by the collision of the through stopping segment 104 and/or the through checking segment 103 against the orifice, in the scheme, the through checking sleeve is arranged on the grinding shaft 10 in a sliding manner and is connected to the grinding shaft 10 through a spring, so that the through checking sleeve can form a yielding position when touching the orifice, an operator can have enough observation time, and the orifice is prevented from being damaged.

Example three:

on the basis of the first or second embodiment, since the outer diameter of the polishing head 101 becomes smaller after the polishing head 101 with a fixed size is used for multiple times, so that the polished aperture becomes smaller, and a new polishing head 101 needs to be frequently replaced, so that the processing cost is higher, in this embodiment, as shown in fig. 6 and 7, the polishing head 101 includes a supporting block 11, a connecting rod 405, an elastic pad 403, and a polishing layer 404, the supporting block 11 is connected to one end of the polishing shaft 10 through the connecting rod 405, an air inlet is formed in the polishing shaft 10, as shown in fig. 2 and 3, connecting holes for connecting an external air source are formed in the first supporting block 20 and the second supporting block 21, the air inlet penetrates into the connecting holes, an air inlet pipe (not shown) is connected outside the connecting holes, the elastic pad 403 is in an annular structure, two ends of the elastic pad are respectively connected to the polishing shaft 10 and the supporting block 11 in a sealing manner, the outer side of the, when the air inlet is filled with air, the elastic pad 403 drives the grinding layer 404 to bulge outwards along the radial direction of the grinding shaft 10.

The S3 includes:

S31A, connecting the two air inlet pipes with an external air source;

S32A starts external air supply and starts electric telescopic handle 50, makes electric telescopic handle 50 extension and drive supporting seat 30 removes, cushion 403 is under the effect of atmospheric pressure to the outside protruding deformation of week side of grinding axle 10 drives the surface at first hole, second hole and third hole of conflict of wearing layer 404, right first hole the second hole with the third hole is ground.

Of course, it is understood that the scheme in the present embodiment may be performed on the basis of the scheme in the second embodiment.

During the grinding, let in the air through the connecting hole, the air passes through the connecting hole and gets into in the inlet port, and is gaseous to be filled in the inlet port to thereby make the cushion 403 receive atmospheric pressure outside protruding conflict including the pore surface, realize grinding. Because the elastic margin of the elastic pad 403 is large, the elastic pad can deform through air pressure, so as to effectively compensate the grinding layer 404 which becomes thinner gradually, thereby effectively reducing the replacement frequency of the grinding head 101, and although the deformation of the elastic pad 403 is uncontrollable, the elastic pad can work in combination with a general detection sleeve, so that the detection without stopping can be realized, and the processing efficiency can be improved under the condition of having a large compensation margin.

In the embodiment, as shown in fig. 6, a pressure relief hole 111 is formed in the support block 11, and an axis of the pressure relief hole 111 coincides with an axis of the grinding shaft 10. The aperture of the pressure relief hole 111 is smaller than that of the air inlet hole. Therefore, although the pressure relief hole 111 will cause the air flow to flow out, the aperture of the pressure relief hole 111 is small, so that the air pressure in the air inlet can still be kept high, and the elastic pad 403 can effectively compensate.

Example four:

in this embodiment, as shown in fig. 8, 9 and 10, the grinding head 101 is a grinding ring 40, the grinding ring 40 includes a ring body, a supporting shaft 41 and a rotating blade 42, an air inlet hole is formed in the grinding shaft 10, connecting holes for connecting an external air source are formed in the first supporting block 20 and the second supporting block 21, the air inlet hole penetrates into the connecting holes, an air inlet pipe (not shown in the figure) is externally connected to the connecting holes, and a front end of the air inlet hole (an end portion far away from the first supporting block 20 and/or the second supporting block 21) is a hollow structure for allowing air to flow out; the rotating blades 42 are positioned in the air inlet holes, the ring body is positioned on the outer side of the grinding shaft 10, the supporting shaft 41 is rotatably arranged at the front end of the grinding shaft 10, the rotating blades 42 are fixedly arranged at one end of the supporting shaft 41 positioned in the air inlet holes, and the ring body is fixedly arranged at one end of the supporting shaft 41 positioned on the outer side of the grinding shaft 10;

an inflation cavity 402 is formed in the ring body, the cross section of the ring body is of a C-shaped structure, the ring body is provided with an opening end and a bottom wall opposite to the opening end, the opening end faces the grinding shaft 10, the bottom wall is provided with a drainage hole 401, and the area of the projection of the drainage hole 401 in the axial direction of the grinding shaft 10 is smaller than the area of the projection of the opening end in the axial direction of the grinding shaft 10, so that high pressure can be effectively formed in the inflation cavity 402;

the periphery of the ring body is hermetically covered with an annular elastic pad 403, one side of the elastic pad 403, which is far away from the ring body, is fixedly provided with a grinding layer 404, and when the air inlet is filled with air, the elastic pad 403 drives the grinding layer 404 to bulge outwards along the radial direction of the ring body;

when the inlet is inflated, the rotating blades 42 drive the ring body to rotate under the action of the airflow.

The S3 includes:

s31, connecting the two air inlet pipes with an external air source;

s32, starting an external air source and starting the electric telescopic rod 50, so that the electric telescopic rod 50 extends and drives the supporting seat 30 to move, and the elastic pad 403 protrudes outward toward the circumferential side of the grinding shaft 10 under the action of air pressure and deforms, so as to drive the grinding layer 404 to abut against the surfaces of the first inner hole, the second inner hole and the third inner hole, thereby grinding the first inner hole, the second inner hole and the third inner hole;

s33, the airflow drives the rotating blade 42 to rotate, and the rotating blade 42 drives the ring body to rotate through the supporting shaft 41.

The during operation, aerify through the intake pipe, the air current passes through the inlet port, the fretwork position that sees through the inlet port front end gets into aerifys chamber 402, because the projected area of discharge orifice 401 is less than the area of ring body open end, consequently, the air input of air current is greater than the air output, thereby make and form atmospheric pressure in aerifing chamber 402, force cushion 403 to warp, drive wearing layer 404 and contradict on the lateral wall of hole, and the air current flow in-process, can drive blade 42 and rotate, blade 42 rotates and drives the ring body and rotate and then drive wearing layer 404, because grinding axle 10 itself has a rotation rate, the rotational speed of wearing layer 404 is grinding axle 10's rotational speed plus the rotational speed of ring body, thereby realize high-speed grinding, improve grinding efficiency and effect.

The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the above embodiments, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.

Claims (6)

1. A method for synchronously grinding a workpiece with multiple inclined inner bores, which is used for grinding the inner bores of the workpiece, wherein the workpiece at least comprises a first inner bore, a second inner bore and a third inner bore, the first inner bore and the third inner bore are arranged in a splayed shape, and the first inner bore and the third inner bore are symmetrically arranged relative to the second inner bore, and the method comprises the following steps:

s1, providing a grinder, the grinder comprising:

the supporting seat is provided with a guide sliding chute;

the grinding device comprises a grinding shaft, a first supporting block and two second supporting blocks, the two second supporting blocks are symmetrically arranged on two sides of the first supporting block, the two second supporting blocks are slidably arranged in the guide sliding groove, the grinding shaft is fixedly arranged on each of the first supporting block and the second supporting block, an included angle is formed between the grinding shaft on the second supporting block and the grinding shaft on the first supporting block, the grinding shafts on the two second supporting blocks are symmetrically arranged along the grinding shaft on the first supporting block, and one end, away from the first supporting block and/or the second supporting block, of each grinding shaft is provided with a grinding head for grinding an inner hole of a workpiece;

the electric telescopic rod is used for driving the supporting seat to move;

s2, clamping the workpiece to enable the axis of the second inner hole to coincide with the axis of the grinding shaft on the first supporting block;

s3, starting the electric telescopic rod to extend and drive the supporting seat to move, wherein the supporting seat drives the first supporting block and the second supporting block to move so as to drive the grinding shaft to move towards the workpiece direction, so that the grinding shafts on the first supporting block enter the second inner hole and grind the second inner hole, the grinding shafts on the two second supporting blocks enter the first inner hole and the third inner hole respectively, and the first inner hole and the third inner hole are ground;

and S4, retracting the electric telescopic rod to drive the supporting seat to move backwards and drive the first supporting block and the second supporting block to move backwards, so that the grinding shaft is separated from the first inner hole, the second inner hole and the third inner hole.

2. The method as claimed in claim 1, wherein the grinding shaft comprises an abdicating section, a checking section and a stopping section, the abdicating section has a diameter smaller than the diameter of the inner hole of the workpiece, the checking section has an outer diameter of a lower limit value of the diameter of the inner hole of the workpiece, the stopping section has an outer diameter of an upper limit value of the diameter of the inner hole of the workpiece, and the abdicating section has a diameter smaller than the diameter of the abdicating section.

3. The method for synchronously grinding the workpiece with the multiple inclined inner holes according to claim 1, wherein the grinding machine further comprises a yielding spring, the grinding section comprises a yielding section and a passing detection sleeve, the passing detection sleeve comprises a passing detection section and a stopping section, the diameter of the yielding section is smaller than the diameter of the inner hole of the workpiece, the outer diameter of the passing detection section is the lower limit value of the diameter of the inner hole of the workpiece, the outer diameter of the stopping section is the upper limit value of the diameter of the inner hole of the workpiece, and the diameter of the yielding section is smaller than the diameter of the passing detection section;

the general inspection sleeve is slidably arranged on the grinding shaft, one end of the abdicating spring is fixedly connected to the general member sleeve, and the other end of the abdicating spring is fixedly connected to the grinding shaft;

the S3 further includes:

s31, after the grinding shaft penetrates through the first inner hole, the second inner hole and the third inner hole simultaneously, the electric telescopic rod is continuously driven to drive the grinding shaft to move;

when the three through inspection sections respectively enter the first inner hole, the second inner hole and the third inner hole and the three through stopping sections respectively move backwards, the electric telescopic rod is controlled to drive the grinding shaft to move reversely to return to the initial position;

when three lead to when examining arbitrary one of section and moving backward, then control electric telescopic handle drives grinding axle reverse movement gets back to initial position after, repeats S2, until three lead to examine the section and all get into the hole, three when ending the section and moving backward respectively, control electric telescopic handle drives grinding axle reverse movement gets back to initial position.

4. The method for synchronously grinding the workpiece with the multiple inclined inner holes according to claim 1, wherein the grinding head comprises a support block, a connecting rod, an elastic pad and a grinding layer, the support block is connected to one end of the grinding shaft through the connecting rod, an air inlet hole is formed in the grinding shaft, connecting holes for connecting an external air source are formed in the first support block and the second support block, the air inlet hole penetrates into the connecting holes, an air inlet pipe is connected outside the connecting holes, the elastic pad is of an annular structure, two ends of the elastic pad are respectively connected to the grinding shaft and the support block in a sealing mode, the grinding layer is wrapped on the outer side of the elastic pad, and when the air inlet hole is filled with air, the elastic pad drives the grinding layer to protrude outwards along the radial direction of the grinding shaft;

the S3 includes:

s31, connecting the two air inlet pipes with an external air source;

s32, start outside air supply and start electric telescopic handle makes electric telescopic handle extension and drive the supporting seat removes, the cushion under atmospheric pressure to the outside protruding deformation in week side of grinding axle drives the surface of wearing layer conflict at first hole, second hole and third hole is right first hole the second hole with the third hole is ground.

5. The method of claim 1, wherein the support block defines a relief hole having an axis coincident with an axis of the grinding shaft.

6. The method for synchronously grinding the workpiece with the multiple inclined inner holes according to claim 1, wherein the grinding head is a grinding ring, the grinding ring comprises a ring body, a supporting shaft and rotating blades, an air inlet hole is formed in the grinding shaft, connecting holes for connecting an external air source are formed in the first supporting block and the second supporting block, the air inlet hole penetrates into the connecting holes, an air inlet pipe is externally connected with the connecting holes, and the front end of the air inlet hole is of a hollow structure and is used for enabling air to flow out; the rotating blade is positioned in the air inlet, the ring body is positioned on the outer side of the grinding shaft, the supporting shaft is rotatably arranged at the front end of the grinding shaft, the rotating blade is fixedly arranged at one end of the supporting shaft positioned in the air inlet, and the ring body is fixedly arranged at one end of the supporting shaft positioned on the outer side of the grinding shaft;

an inflation cavity is formed in the ring body, the cross section of the ring body is of a C-shaped structure, the ring body is provided with an opening end and a bottom wall opposite to the opening end, the opening end faces the grinding shaft, a discharge hole is formed in the bottom wall, and the area of the projection of the discharge hole in the axial direction of the grinding shaft is smaller than the area of the projection of the opening end in the axial direction of the grinding shaft;

the periphery of the ring body is hermetically coated with an annular elastic pad, one side of the elastic pad, which is far away from the ring body, is fixedly provided with a grinding layer, and when the air inlet is filled with air, the elastic pad drives the grinding layer to bulge outwards along the radial direction of the ring body;

when the air inlet is filled with air, the rotating blades drive the ring body to rotate under the action of airflow;

the S3 includes:

s31, connecting the two air inlet pipes with an external air source;

s32, starting an external air source and starting the electric telescopic rod to extend the electric telescopic rod and drive the supporting seat to move, wherein the elastic pad protrudes outwards towards the periphery of the grinding shaft under the action of air pressure and deforms to drive the grinding layer to abut against the surfaces of the first inner hole, the second inner hole and the third inner hole so as to grind the first inner hole, the second inner hole and the third inner hole;

and S33, the airflow drives the rotating blades to rotate, and the rotating blades drive the ring body to rotate through the supporting shaft.

Images