A steel parts grinding device for engineering machinery production

Abstract

The present invention relates to the technical field of grinding machines, and discloses a steel grinding device for engineering machinery production, including a bed and a clamp on the bed, the bed is also slidably connected to a plurality of grinding devices, the plurality of grinding devices are connected to each other, one end of one of the grinding devices is installed with an adjustment device, the grinding device includes a first set connected to the upper end of the bed, the interior of the first set is slidably connected to a second column, the upper end of the second column passes through the first set and extends to the outside of the first set, the upper end of the second column is installed with a grinding sheet, the other end of the first set is connected to a second set, and a steering component is installed on the second set. The present invention utilizes an inclined surface to abut against a curved inner wall to reduce the contact area, and then when the grinding device continues to slide to one end, it is guided by a cone head to adjust the position of one end of the grinding device, so that the grinding device as a whole can pass through the special-shaped steel pipe.

Description

Technical Field

[0001] The invention relates to the field of grinding machines, in particular to a steel part grinding device used in the production of engineering machinery. Background Art

[0002] A grinder is a machine tool that uses abrasive tools to grind the surface of a workpiece. Most grinders use high-speed rotating grinding wheels for grinding, and a few use other grinding tools such as oilstones and abrasive belts and free abrasives for processing, such as honing machines, superfinishing machines, belt grinders, grinders and polishing machines. Among them, internal cylindrical grinders are mainly used to grind the inner hole surfaces and end faces of cylindrical, conical or other shaped lines.

[0003] The existing internal grinding of steel pipes cannot adapt to steel pipes of different diameters. When the steel pipe is too long, another set of grinding devices needs to be replaced. The grinding devices of appropriate length cannot be freely spliced ​​and assembled. When special-shaped steel pipes appear, the existing grinding devices cannot completely grind, and even the grinding devices cannot penetrate the special-shaped steel pipes. Summary of the invention

[0004] The present invention provides a steel grinding device for engineering machinery production, which solves the problem mentioned in the above background technology that the existing steel grinding device cannot be freely spliced ​​and assembled into a grinding device of appropriate length and the grinding effect of special-shaped steel pipes is poor.

[0005] The present invention provides the following technical solution: A steel part grinding device for engineering machinery production comprises a bed and a fixture on the bed, a plurality of grinding devices are slidably connected to the bed, the plurality of grinding devices are connected to each other, and an adjustment device is installed at one end of one of the grinding devices;

[0006] The grinding device comprises a first set connected to the upper end of the bed, a second column is slidably connected inside the first set, the upper end of the second column passes through the first set and extends to the outside of the first set, a grinding sheet is installed on the upper end of the second column, the other end of the first set is connected to the second set, a steering component is installed on the second set, and every two grinding devices are connected through the steering component;

[0007] The steering component comprises a second ball, a connecting sleeve and a first ball, wherein the second ball is connected to one end of the second sleeve, one end of the second ball is connected to the connecting sleeve, and one end of the connecting sleeve is connected to the first ball;

[0008] The adjusting device comprises a cone head connected to one end of the first sleeve, and an outer surface of the cone head is provided with an inclined surface.

[0009] As an optional solution of the steel grinding device for engineering machinery production described in the present invention, a piston cavity is arranged inside the cone head, an adjusting column is slidably connected inside the piston cavity, the adjusting column passes through the piston cavity and extends to the inclined surface, and a plurality of balls are rotatably connected to the upper end of the adjusting column.

[0010] As an optional solution of the steel grinding device for engineering machinery production of the present invention, wherein: the interior of the second set is slidably connected to a first column, the upper end of the first column passes through the second set and extends to the outside of the second set, and the upper end of the first column is hingedly connected to a support plate;

[0011] A rotating device is installed at the lower end of the first column, and the rotating device is used to drive the first column to slide and drive the first column to swing.

[0012] As an optional solution of the steel grinding device for engineering machinery production described in the present invention, wherein: a driving device is installed inside the first set, and the driving device includes a first conveying pipe connected to the first sphere, the connecting sleeve and the inside of the second sphere, one end of the first conveying pipe is connected to a first expansion pipe, one end of the first expansion pipe is connected to a second expansion pipe, one end of the second expansion pipe is connected to a second conveying pipe, the first expansion pipe is used to expand and squeeze the first column to slide, and the second expansion pipe is used to squeeze the second column to slide.

[0013] As an optional solution of the steel grinding device for engineering machinery production of the present invention, wherein: a telescopic column is installed at one end of the second sleeve, one end of the telescopic column is connected to a limiting sleeve, and one end of the second expansion tube is used for expansion and abutment against the limiting sleeve;

[0014] A spiral groove is arranged inside the first sleeve, a convex block is installed at the lower end of the limiting sleeve, and the convex block is slidably connected inside the spiral groove;

[0015] One end of the first sleeve is rotatably connected to one end of the second sleeve.

[0016] As an optional solution of the steel grinding device for engineering machinery production described in the present invention, one end of one of the second delivery pipes is connected to the piston chamber, and a fourth spring is also installed on the outer surface of the adjusting column, and the fourth spring is connected to the cone head.

[0017] As an optional solution of the steel part grinding device for engineering machinery production described in the present invention, the interior of the second sleeve is also connected to a third spring, and the third spring is connected to the first column.

[0018] As an optional solution of the steel grinding device for engineering machinery production described in the present invention, the lower end of the first column is slidably connected with a slide plate, a second spring is arranged between the slide plate and the first column, and the first expansion tube is used to rub the slide plate to make the slide plate slide to one end.

[0019] As an optional solution of the steel grinding device for engineering machinery production described in the present invention, a cylinder is also installed on the upper end of the bed, and a hose is installed at one end of the cylinder. The hose is used to transmit liquid to the inside of the first delivery pipe.

[0020] As an optional solution of the steel grinding device for engineering machinery production described in the present invention, wherein: a spray hole is provided on the first column, the upper end of the spray hole passes through the support plate, the lower end of the spray hole passes through the first column, the upper end of the first expansion tube is connected to a flexible shaft tube, one end of the flexible shaft tube is connected to the lower end of the spray hole;

[0021] The interior of the injection hole is also rotatably connected with a pressure relief valve.

[0022] The present invention has the following beneficial effects:

[0023] 1. The steel grinding device used in the production of engineering machinery uses a second ball to be inserted into the second ball of a second grinding device, and the circular groove is matched with the gap between the first ball and the second ball, so that several grinding devices can be assembled and spliced ​​through the second ball, the connecting sleeve and the first ball, so as to adapt to steel pipes of different lengths, and the second ball and the first ball can be used to adjust the angle of the first set and the second set to adapt to special-shaped steel pipes.

[0024] 2. The steel grinding device used in the production of engineering machinery uses an inclined surface to contact the curved inner wall to reduce the contact area. Then, when the grinding device continues to slide to one end, the position of one end of the grinding device is adjusted through the cone head guide, so that the grinding device can penetrate the special-shaped steel pipe as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 It is a schematic structural diagram of the first grinding device of the present invention.

[0027] Figure 3 It is a schematic diagram of the structure of the regulating device of the present invention.

[0028] Figure 4 It is a main cross-sectional view of the first grinding device of the present invention.

[0029] Figure 5 For the present invention Figure 1Schematic diagram of the local structure at point A.

[0030] Figure 6 For the present invention Figure 4 Schematic diagram of the local structure at location B.

[0031] In the figure: 1, bed; 2, fixture; 3, rotating device; 4, grinding device; 6, adjusting device; 7, cylinder; 9, driving device; 10, hose; 30, injection hole; 31, slide plate; 32, second spring; 33, pressure relief valve; 34, flexible shaft tube; 35, third spring; 41, first set; 42, grinding sheet; 43, first ball; 44, connecting sleeve; 45, second ball; 46, second set; 47, first column; 48, support plate; 49, second column; 61, cone head; 62, inclined surface; 63, piston chamber; 64, ball; 65, fourth spring; 66, adjusting column; 91, first conveying pipe; 92, first expansion pipe; 93, second expansion pipe; 94, second conveying pipe; 95, spiral groove; 96, bump; 97, limit sleeve; 98, telescopic column. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1

[0034] See also Figure 1-3 A steel part grinding device for engineering machinery production includes a bed 1 and a fixture 2 on the bed 1, a plurality of grinding devices 4 are slidably connected to the bed 1, and the plurality of grinding devices 4 are connected to each other, and an adjustment device 6 is installed at one end of one of the grinding devices 4;

[0035] The grinding device 4 includes a first set 41 connected to the upper end of the bed 1, a second column 49 is slidably connected inside the first set 41, the upper end of the second column 49 passes through the first set 41 and extends to the outside of the first set 41, a grinding sheet 42 is installed on the upper end of the second column 49, the other end of the first set 41 is connected to the second set 46, a steering component is installed on the second set 46, and every two grinding devices 4 are connected through the steering component;

[0036] The steering component includes a second ball 45, a connecting sleeve 44 and a first ball 43. The second ball 45 is connected to one end of the second sleeve 46. One end of the second ball 45 is connected to the connecting sleeve 44. One end of the connecting sleeve 44 is connected to the first ball 43.

[0037] The adjusting device 6 comprises a cone head 61 connected to one end of the first sleeve 41 , and an outer surface of the cone head 61 is provided with an inclined surface 62 .

[0038] The existing internal grinding of steel pipes cannot adapt to steel pipes of different diameters, and when the steel pipe is too long, another set of grinding devices needs to be replaced, and the grinding device of the appropriate length cannot be freely spliced ​​and assembled. When special-shaped steel pipes appear, the existing grinding device cannot completely grind, and even the grinding device cannot penetrate the special-shaped steel pipe;

[0039] Place the steel pipe on the fixture 2, and use the fixture 2 to clamp the outer surface of the steel pipe. Figure 2 As shown, every two grinding devices 4 are connected through the second ball 45, the connecting sleeve 44 and the first ball 43, and one end of the first sleeve 41 and one end of the second sleeve 46 are both provided with a circular card slot, the first ball 43 is used to snap into the first sleeve 41 of the first grinding device 4, and the second ball 45 is used to snap into the second ball 45 of the second grinding device 4, and the circular card slot and the first ball 43 and the second ball 45 are gap-matched, so that a plurality of grinding devices 4 are assembled and spliced ​​through the second ball 45, the connecting sleeve 44 and the first ball 43, so as to adapt to steel pipes of different lengths, and the second ball 45 and the first ball 43 can adjust the angle of the first sleeve 41 and the second sleeve 46, so as to adapt to special-shaped steel pipes;

[0040] according to Figure 3 As shown, when grinding is required, the grinding device 4 is inserted into the interior of the steel pipe, and the second column 49 is pushed to slide, and the second column 49 drives the grinding sheet 42 to slide, so that the grinding sheet 42 fits the inner wall of the steel pipe, so that the grinding sheet 42 can grind steel pipes with different inner diameters;

[0041] When encountering a special-shaped steel pipe, such as a steel pipe with one end being straight and the other end being bent downward, with the two ends of the steel pipe forming an obtuse angle, after the grinding device 4 is inserted into the interior of the steel pipe, the grinding device 4 at one end will be limited by the curved inner wall, and it is necessary to repeatedly plug and pull back and forth to adjust the position of one end of the grinding device 4 so that the one end of the grinding device 4 can continue to be inserted into the interior of the curved steel pipe, which is very troublesome. Therefore, a cone head 61 and a bevel 62 are installed at one end of the grinding device 4, wherein the cone head 61 is conical, and the bevel 62 is used to contact the curved inner wall to reduce the contact area. Subsequently, when the grinding device 4 continues to slide toward one end, it is guided by the cone head 61 to adjust the position of one end of the grinding device 4, so that the grinding device 4 can pass through the special-shaped steel pipe as a whole.

[0042] Example 2

[0043] This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 1-3A piston cavity 63 is provided inside the cone head 61, and an adjusting column 66 is slidably connected inside the piston cavity 63. The adjusting column 66 passes through the piston cavity 63 and extends to the inclined surface 62. The upper end of the adjusting column 66 is rotatably connected to a plurality of balls 64.

[0044] In order to improve the steering effect, an adjusting column 66 is slidably connected inside the cone head 61, and a ball 64 is rotatably connected to the upper end of the adjusting column 66. Figure 3 As shown, when the cone head 61 contacts the bend, the three adjustment columns 66 are moved by sliding so that the balls 64 on the three adjustment columns 66 all contact the inner wall of the steel pipe, and the cone head 61 is now located at the center of the bend. Then, the sliding grinding device 4 is used to make the cone head 61 no longer contact the bend, so that the cone head 61 can pass smoothly through the inside of the bend.

[0045] Example 3

[0046] This embodiment is an improvement made on the basis of embodiment 2. For details, please refer to Figure 1-4 The interior of the second sleeve 46 is slidably connected with a first column 47, the upper end of the first column 47 passes through the second sleeve 46 and extends to the outside of the second sleeve 46, and the upper end of the first column 47 is hingedly connected with a support plate 48;

[0047] A rotating device 3 is installed at the lower end of the first column 47, and the rotating device 3 is used to drive the first column 47 to slide and drive the first column 47 to swing;

[0048] A driving device 9 is installed inside the first sleeve 41. The driving device 9 includes a first delivery pipe 91 connected to the first ball 43, the connecting sleeve 44, and the second ball 45. One end of the first delivery pipe 91 is connected to a first expansion pipe 92, one end of the first expansion pipe 92 is connected to a second expansion pipe 93, and one end of the second expansion pipe 93 is connected to a second delivery pipe 94. The first expansion pipe 92 is used to expand and squeeze the first column 47 to slide, and the second expansion pipe 93 is used to squeeze the second column 49 to slide.

[0049] A telescopic column 98 is installed at one end of the second sleeve 46, and one end of the telescopic column 98 is connected to a limiting sleeve 97. One end of the second expansion tube 93 is used for expansion and abutment against the limiting sleeve 97.

[0050] The first sleeve 41 is provided with a spiral groove 95 inside, and a protrusion 96 is installed at the lower end of the limiting sleeve 97, and the protrusion 96 is slidably connected inside the spiral groove 95;

[0051] One end of the first sleeve 41 is rotatably connected to one end of the second sleeve 46 .

[0052] according to Figure 4As shown, by filling the first delivery pipe 91 with liquid, the first expansion pipe 92 and the second expansion pipe 93 are squeezed and expanded by the liquid, the first expansion pipe 92 is expanded and squeezed to make the first column 47 slide upward, and the first column 47 moves upward to drive the support plate 48 to contact the inner wall of the steel pipe, so that the second sleeve 46 and the first sleeve 41 are fixed by the support plate 48, and the second expansion pipe 93 is expanded and squeezed to make the second column 49 slide upward, and the second column 49 moves upward to drive the grinding sheet 42 to contact the inner wall of the steel pipe. As the second expansion pipe 93 continues to expand, the limiting sleeve 97 is squeezed to slide toward one end, and the limiting sleeve 97 drives the protrusion 96 to slide toward one end, and the protrusion 96 is slidably connected to the spiral groove 95. Since one end of the first sleeve 41 is rotatably connected to one end of the second sleeve 46, the first sleeve 41 is driven to rotate, so that the first sleeve 41 drives the second column 49 and the grinding sheet 42 to rotate, and the inner wall of the steel pipe is rubbed by the grinding sheet 42.

[0053] It should be noted that the lower end of the second column 49 is semi-spherical, so when the first sleeve 41 drives the second column 49 to rotate, the lower end of the second column 49 will not be stuck on the second expansion tube 93;

[0054] The telescopic column 98 includes a square tube, a square rod and a return spring. Therefore, when the limit sleeve 97 slides to one end, the limit sleeve 97 will pull the return spring of the telescopic column 98 to extend. When the liquid inside the second expansion tube 93 is depressurized, the return spring pulls the limit sleeve 97 to return to its original position.

[0055] Example 4

[0056] This embodiment is an improvement made on the basis of embodiment 3. For details, please refer to Figure 1-6 One end of a second delivery pipe 94 is connected to the piston chamber 63 , and a fourth spring 65 is installed on the outer surface of the adjustment column 66 , and the fourth spring 65 is connected to the cone head 61 .

[0057] The liquid is transmitted to the piston cavity 63 through the second delivery pipe 94 to push the adjustment column 66 inside the piston cavity 63 to slide;

[0058] The interior of the second sleeve 46 is also connected to the third spring 35 , and the third spring 35 is connected to the first column 47 .

[0059] The axis of the first column 47 is inclined to the axis of the driving device 9, and there is an acute angle between the axis of the first column 47 and the axis of the driving device 9;

[0060] Since several grinding devices 4 are spliced ​​together, they are highly plastic and can be deformed according to the degree of bending of the pipe. However, the strong plasticity will make the whole too soft. When the cylinder 7 pushes several grinding devices 4 to slide to one end, the thrust of the grinding device 4 at one end is the largest initially, and then the thrust will gradually decrease, resulting in the thrust of the grinding device 4 at the other end being too small to push the adjusting device 6 to move the steering position. Therefore, a rotating device 3 is set at one end of the first column 47, and the rotating device 3 is used to assist the support plate 48 to complete the boost of the first set 41. Specifically, according to Figure 6 As shown, when the second expansion tube 93 expands and squeezes the first column 47 to slide, and then when the second expansion tube 93 expands and pushes the limiting sleeve 97 to slide to one end, the second expansion tube 93 and the first expansion tube 92 will both expand and slide. Since the support plate 48 is fixed against the inner wall, the first column 47 rotates with the hinge point between the first column 47 and the support plate 48 as a fulcrum, so that the first expansion tube 92 rubs the lower end of the first column 47, so that the upper end of the first column 47 swings to one end, and the first column 47 drives the second sleeve 46 and the first sleeve 41 to slide to one end, so that when the cone head 61 turns, the cone head 61 has enough thrust to move, thereby assisting the cone head 61 to better complete the turning and adjusting position, and adapt to more complex special-shaped pipes;

[0061] It should be noted that when the spiral groove 95 is depressurized, the first column 47 is pulled back to its original position by the third spring 35 ;

[0062] The lower end of the first column 47 is slidably connected with a slide plate 31, a second spring 32 is provided between the slide plate 31 and the first column 47, and the first expansion tube 92 is used to rub the slide plate 31 so that the slide plate 31 slides toward one end;

[0063] The first expansion tube 92 is used to frictionally drive the slide plate 31 to slide, so that the grinding plate 42 is rotated to rub the inner wall of the steel pipe. Then, when the slide plate 31 slides to the limit position, the slide plate 31 drives the first column 47 to move, thereby first rubbing the rotating steel pipe and then driving the grinding device 4 to move as a whole.

[0064] Example 5

[0065] This embodiment is an improvement made on the basis of embodiment 4. For details, please refer to Figure 1-6 A cylinder 7 is also installed at the upper end of the bed 1, and a hose 10 is installed at one end of the cylinder 7. The hose 10 is used to transmit the liquid to the inside of the first delivery pipe 91 for communication.

[0066] according to Figure 5 As shown, when the grinding device 4 slides toward one end as a whole, the first delivery pipe 91 of one of the grinding devices 4 is slidably connected to the hose 10. Since the hose 10 is relatively long, it is adapted to the sliding of several grinding devices 4.

[0067] When the adjusting device 6 slides out from one end of the special-shaped steel pipe, the hose 10 is filled with liquid to change the hose 10 from being flexible to being rigid, so that the hose 10 is pushed to slide back and forth through the cylinder 7, and the grinding device 4 is driven by the hose 10 to slide back and forth and rub the inner wall of the steel pipe, so as to better grind the inner wall of the steel pipe.

[0068] Example 6

[0069] This embodiment is an improvement made on the basis of embodiment 5. For details, please refer to Figure 1-6 The first column 47 is provided with an injection hole 30, the upper end of the injection hole 30 penetrates the support plate 48, the lower end of the injection hole 30 penetrates the first column 47, the upper end of the first expansion tube 92 is connected to a flexible shaft tube 34, and one end of the flexible shaft tube 34 is connected to the lower end of the injection hole 30;

[0070] A pressure relief valve 33 is rotatably connected to the interior of the injection hole 30 .

[0071] In order to further improve the grinding effect, a spray hole 30 is provided inside the first column 47. Figure 3 and Figure 6 As shown, when the first delivery pipe 91, the first expansion pipe 92, the second expansion pipe 93 and the second delivery pipe 94 are filled with liquid, as the hydraulic pressure increases, the pressure relief valve 33 is pushed open, so that the liquid at the first expansion pipe 92 enters the interior of the injection hole 30 through the flexible shaft tube 34, and the liquid is sprayed out from the other end of the injection hole 30 to the outer surface of the grinding sheet 42, thereby washing the outer surface of the grinding sheet 42 and the inner wall of the steel pipe, so as to prevent impurities from adhering to the grinding sheet 42 and affecting the grinding effect, and as the liquid pressure inside the driving device 9 is released, the second expansion pipe 9 3. The liquid inside the first expansion tube 92 and the piston chamber 63 will no longer squeeze the first column 47, the second column 49 and the adjusting column 66, so that the first column 47, the second column 49 and the adjusting column 66 can be reset. Then, when the hydraulic pressure inside the driving device 9 is increased, the support plate 48 is used to contact the inner wall of the steel pipe again, and then the second set 46 and the first set 41 are pushed to move. This cycle can not only drive the first set 41 and the second set 46 to slide in the steel pipe, but also continuously adjust the contact point between the cone head 61 and the inner wall of the steel pipe, thereby continuously adjusting the position to better adapt to the special-shaped steel pipe.

[0072] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0073] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A steel part grinding device for use in engineering machinery production, comprising a bed (1) and a fixture (2) on the bed (1), characterized in that: The bed (1) is also slidably connected to a plurality of grinding devices (4), the plurality of grinding devices (4) being connected to each other, and an adjusting device (6) is installed at one end of one of the grinding devices (4); The grinding device (4) comprises a first sleeve (41) connected to the upper end of the bed (1); a second column (49) is slidably connected inside the first sleeve (41); the upper end of the second column (49) passes through the first sleeve (41) and extends to the outside of the first sleeve (41); a grinding sheet (42) is installed on the upper end of the second column (49); the other end of the first sleeve (41) is connected to the second sleeve (46); a steering component is installed on the second sleeve (46); and every two grinding devices (4) are connected via the steering component. The steering component comprises a second ball (45), a connecting sleeve (44) and a first ball (43); the second ball (45) is connected to one end of the second sleeve (46); one end of the second ball (45) is connected to the connecting sleeve (44); and one end of the connecting sleeve (44) is connected to the first ball (43); The adjusting device (6) comprises a cone head (61) connected to one end of the first sleeve (41), and an outer surface of the cone head (61) is provided with an inclined surface (62).

2. The steel part grinding device for engineering machinery production according to claim 1 is characterized in that: A piston cavity (63) is provided inside the cone head (61), and an adjusting column (66) is slidably connected inside the piston cavity (63). The adjusting column (66) passes through the piston cavity (63) and extends to the inclined surface (62). The upper end of the adjusting column (66) is rotatably connected to a plurality of balls (64).

3. The steel part grinding device for engineering machinery production according to claim 2 is characterized in that: The interior of the second sleeve (46) is slidably connected to a first column (47), the upper end of the first column (47) passes through the second sleeve (46) and extends to the outside of the second sleeve (46), and the upper end of the first column (47) is hingedly connected to a support plate (48); A rotating device (3) is installed at the lower end of the first column (47), and the rotating device (3) is used to drive the first column (47) to slide and drive the first column (47) to swing.

4. The steel part grinding device for engineering machinery production according to claim 3 is characterized in that: A driving device (9) is installed inside the first sleeve (41), and the driving device (9) comprises a first delivery pipe (91) connected to the first ball (43), the connecting sleeve (44) and the second ball (45); one end of the first delivery pipe (91) is connected to a first expansion pipe (92); one end of the first expansion pipe (92) is connected to a second expansion pipe (93); one end of the second expansion pipe (93) is connected to a second delivery pipe (94); the first expansion pipe (92) is used to expand and squeeze the first column (47) to slide; the second expansion pipe (93) is used to squeeze the second column (49) to slide.

5. The steel part grinding device for engineering machinery production according to claim 4 is characterized in that: A telescopic column (98) is installed at one end of the second sleeve (46), one end of the telescopic column (98) is connected to a limiting sleeve (97), and one end of the second expansion tube (93) is used to expand and abut against the limiting sleeve (97); The first sleeve (41) is provided with a spiral groove (95) inside, and a protrusion (96) is installed at the lower end of the limiting sleeve (97), and the protrusion (96) is slidably connected to the inside of the spiral groove (95); One end of the first sleeve (41) is rotatably connected to one end of the second sleeve (46).

6. The steel part grinding device for engineering machinery production according to claim 5 is characterized in that: One end of one of the second delivery pipes (94) is in communication with the piston chamber (63), and a fourth spring (65) is also installed on the outer surface of the adjustment column (66), and the fourth spring (65) is connected to the cone head (61).

7. The steel part grinding device for engineering machinery production according to claim 6 is characterized in that: A third spring (35) is also connected to the interior of the second sleeve (46), and the third spring (35) is connected to the first column (47).

8. The steel part grinding device for engineering machinery production according to claim 7 is characterized in that: The lower end of the first column (47) is slidably connected to a slide plate (31), a second spring (32) is provided between the slide plate (31) and the first column (47), and the first expansion tube (92) is used to rub the slide plate (31) so that the slide plate (31) slides toward one end.

9. The steel part grinding device for engineering machinery production according to claim 1, characterized in that: A cylinder (7) is also installed at the upper end of the bed (1), and a hose (10) is installed at one end of the cylinder (7). The hose (10) is used to transmit liquid to the inside of the first delivery pipe (91).

10. The steel part grinding device for engineering machinery production according to claim 8, characterized in that: The first column (47) is provided with an injection hole (30), the upper end of the injection hole (30) penetrates the support plate (48), and the lower end of the injection hole (30) penetrates the first column (47); the upper end of the first expansion tube (92) is connected to a flexible shaft tube (34), and one end of the flexible shaft tube (34) is connected to the lower end of the injection hole (30); A pressure relief valve (33) is also rotatably connected to the interior of the injection hole (30).

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