A steel part polishing device for engineering machinery production

Abstract

The present application relates to the technical field of machining technology, and particularly relates to a steel part polishing device for engineering machinery production, which comprises a base, a clamping part and a polishing part capable of moving along the base; a grinding head mounting frame of the polishing part is mounted on a stand column through a buffer support integrating spring buffering and hydraulic damping functions. A polishing resistance response rod is arranged in a driving assembly of the polishing head; when the polishing resistance increases due to the rough surface of the workpiece, a phase difference is generated between the inner rod and the outer rod, a torque difference is converted into an axial thrust through a threaded guide structure, the outer rod is driven to generate axial displacement, a cooling water flow is increased through a synchronous linkage slide valve assembly, and a jet flow rate is preferably increased through a synchronous linkage extrusion assembly. The present application realizes real-time adaptive matching of cooling capacity and cutting heat generation, effectively preventing workpiece burning and grinding head overheating.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a steel grinding equipment for the production of engineering machinery. Background Technology

[0002] In the production of steel rotating parts such as hydraulic cylinder rods and drive shafts for construction machinery, external cylindrical grinding equipment is typically used for surface finishing to remove oxide scale, rust, or machining allowances. In this type of grinding operation, the cooling system plays a crucial role in dissipating the cutting heat generated during grinding and preventing thermal damage to the workpiece surface.

[0003] However, existing cylindrical grinding equipment is typically equipped with a constant-flow cooling spray system, meaning that the liquid supply from the cooling nozzles remains constant regardless of changes in grinding conditions. But in actual production, the surface quality of the steel parts being processed is often uneven, frequently exhibiting "rough areas" such as severe localized corrosion, weld slag residue, or uneven material hardness. When the grinding head reaches these areas, the grinding resistance increases instantaneously, causing a rapid surge in cutting heat. At this point, the existing constant-flow cooling system cannot detect this load change and increase the flow rate in time, resulting in insufficient cooling capacity relative to the rapidly accumulating heat. This easily leads to localized burns on the workpiece surface due to excessive temperature or damage to the grinding head due to overheating, severely affecting the surface quality and mechanical properties of the finished steel part. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a steel grinding equipment for the production of engineering machinery, so as to solve the problem that the existing external cylindrical grinding equipment cannot adaptively increase the cooling flow, resulting in insufficient local heat dissipation capacity and thus causing workpiece surface burns or grinding head overheating damage.

[0005] To achieve the above objectives, the present invention provides a steel grinding device for engineering machinery production, comprising a base, wherein a clamping member is disposed on the base and a grinding part movable along the base; the grinding part includes: The column is vertically mounted on the base. Grinding head mounting frame; A buffer support is provided, which connects the column and the grinding head mounting frame. The drive component, located on the grinding head mounting frame, is used to drive the grinding head to rotate; The slide valve assembly has an inlet end and an outlet end, with a nozzle connected to the outlet end; The drive assembly includes a drive motor and a grinding resistance response rod connected between the grinding head and the drive motor. The grinding resistance response rod includes an inner rod coaxially connected to the grinding head and an outer rod sleeved around the outer periphery of the inner rod. A threaded guide structure is provided between the inner rod and the outer rod. This threaded guide structure is configured such that when the grinding head is obstructed, causing a phase difference between the inner rod and the outer rod, the torque difference is converted into axial thrust, driving the outer rod to produce axial displacement relative to the inner rod. The outer rod is mechanically linked to the valve core of the slide valve assembly through a transmission assembly. When the grinding resistance increases and drives the outer rod to move axially, the transmission assembly synchronously drives the valve core to move, thereby increasing the water flow rate of the slide valve assembly.

[0006] Furthermore, the slide valve assembly includes a hollow valve body with a through hole one, and the valve core is slidably disposed therein and has a through hole two; the movement of the valve core can change the overlap between the through hole one and the through hole two; the grinding resistance response rod has the characteristic of monotonically increasing the water flow rate as the grinding resistance increases.

[0007] Furthermore, an external toothed ring sleeve is fixedly sleeved on the outer periphery of the outer rod, and a drive gear is provided at the output end of the drive motor. The drive gear meshes with the external toothed ring sleeve. In order to ensure power transmission during axial displacement, the effective axial engagement length of the external toothed ring sleeve is configured to be greater than the maximum axial movement stroke of the outer rod.

[0008] Furthermore, the inner cavity of the outer rod is provided with a return spring. The return spring is in a compressed state, and its two ends abut against the ends of the outer rod and the inner rod respectively, so as to provide a reverse thrust for the outer rod to return when the grinding resistance decreases.

[0009] Furthermore, the transmission assembly includes a stroke amplification assembly, which includes a mounting rod fixed to the outer wall of the slide valve assembly. The other end of the mounting rod is rotatably connected to a shaft and a large gear and a small gear fixed coaxially with the shaft. The outer rod is connected to a toothed plate one that meshes with the small gear, and the valve core is connected to a toothed plate two that meshes with the large gear. The stroke amplification assembly is used to amplify the response sensitivity of the valve core relative to the displacement of the outer rod.

[0010] Furthermore, a rubber sleeve made of elastic material is provided at the outlet of the nozzle, and a squeezing component is provided on the nozzle; The extrusion assembly is linked to the valve core and is configured to simultaneously extrude the rubber sleeve as the water flow rate of the slide valve assembly increases, thereby limiting the water outlet cross section and increasing the jet velocity.

[0011] Furthermore, the extrusion assembly includes a bidirectional lead screw and extrusion plates threadedly connected to the bidirectional lead screw. The bidirectional lead screw is driven by the displacement of the valve core through a gear transmission structure, converting the linear motion of the valve core into a clamping force on the rubber sleeve.

[0012] Furthermore, the gear transmission structure includes two sets of transmission teeth, which are respectively fixedly connected to one end of the bidirectional lead screw near the slide valve assembly, and can drive the bidirectional lead screw to rotate synchronously; A drive rack is slidably disposed at the bottom of the nozzle and simultaneously engaged with two sets of transmission teeth; one end of the drive rack extends and is connected to the transmission assembly, and is configured such that: when the valve core moves, it drives the drive rack to move linearly, thereby driving the transmission teeth to rotate, and finally driving the bidirectional screw to perform the opening and closing control of the extrusion plate.

[0013] Furthermore, the buffer support includes a sleeve rod, a slide rod, and a partition that divides the sleeve rod into a spring chamber and a hydraulic chamber; the slide rod is connected to a piston rod passing through the partition and a plug located in the hydraulic chamber; the hydraulic chamber is connected to the water inlet pipe through a connecting valve with a throttling function.

[0014] Furthermore, the threaded guide structure includes a helical guide groove formed on the outer wall of the inner rod and a guide block fixed on the inner wall of the outer rod; the helical guide groove is configured such that when the grinding head is obstructed and decelerated, it drives the outer rod to move towards the grinding head.

[0015] This invention incorporates a grinding resistance response rod in the drive assembly. When the grinding head encounters a high-resistance area, causing a sudden increase in cutting heat, the grinding resistance response rod automatically drives the outer rod to generate axial displacement using the torque generated by the phase difference. Simultaneously, it links the slide valve assembly to increase the flow area of ​​the cooling water, thereby achieving adaptive matching between the cooling flow rate and the grinding load and heat generation. This ensures that sufficient cooling medium is provided to remove accumulated heat under high-load conditions, effectively preventing workpiece surface burns and grinding head overheating damage. Under low-load conditions, the flow rate is automatically reduced to save medium consumption. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure of the grinding part according to an embodiment of the present invention; Figure 3 Embodiments of the present invention Figure 2A magnified structural diagram of A in the middle; Figure 4 This is a partial structural diagram of the grinding part according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of the buffer support according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the internal structure of the grinding resistance response rod according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the internal structure of the slide valve assembly according to an embodiment of the present invention; Figure 8 This is a schematic diagram of a through-hole structure according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the valve core and through hole structure according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the overall nozzle structure according to an embodiment of the present invention; Figure 11 Embodiments of the present invention Figure 10 A magnified structural diagram of B in the diagram.

[0018] The diagram is marked as follows: 1. Grinding section; 2. Buffer support; 21. Sleeve rod; 22. Slide rod; 23. Partition plate; 24. Piston rod; 25. Buffer spring; 26. Plug; 27. Connecting valve; 3. Grinding head mounting frame; 4. Grinding head; 5. Drive assembly; 51. Drive motor; 52. Drive gear; 53. Grinding resistance response rod; 531. Inner rod; 532. Outer rod; 533. External gear ring; 534. Helical guide groove; 535. Guide block; 536. Return spring; 6. Slide valve assembly; 61. Hollow valve body; 6 11. Through hole one; 62. Valve core; 621. Through hole two; 63. Water inlet pipe; 7. Transmission assembly; 71. Gear plate one; 72. Connecting rod; 721. Gear plate two; 73. Stroke amplification assembly; 731. Mounting rod; 732. Rotating shaft; 733. Large gear; 734. Small gear; 8. Nozzle; 81. Rubber sleeve; 9. Extrusion assembly; 91. Ear plate; 92. Two-way lead screw; 93. Extrusion plate; 94. Transmission gear; 95. Drive rack; 10. Base; 11. Clamping component; 12. Rod. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0020] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 As shown, a steel grinding device for engineering machinery production includes a base 10, a clamping member 11 disposed on the base 10, and a grinding section 1 movable along the base 10; the grinding section 1 includes: The column is vertically mounted on the base 10; Grinding head mounting frame 3; Buffer support 2, which is connected between the column and the grinding head mounting frame 3; Drive component 5, mounted on grinding head mounting frame 3, is used to drive grinding head 4 to rotate; The slide valve assembly 6 has an inlet end and an outlet end, and the outlet end is connected to a nozzle 8; The grinding resistance response rod 53 includes an inner rod 531 coaxially connected to the grinding head 4 and an outer rod 532 sleeved on the outer periphery of the inner rod 531. The mating gap between the outer rod 532 and the inner rod 531 is filled with a damping medium. A threaded guide structure is provided between the inner rod 531 and the outer rod 532. The threaded guide structure includes a spiral guide groove 534 provided on the outer wall of the inner rod 531 and a guide block 535 provided on the inner wall of the outer rod 532 and mating with the spiral guide groove 534. The threaded guide structure is configured such that when the inner rod 531 and the outer rod 532 rotate relative to each other in the rotation direction, the outer rod 532 is driven to produce an axial displacement relative to the inner rod 531. The outer rod 532 is mechanically linked to the valve core 62 of the slide valve assembly 6 through the transmission assembly 7, so that the axial displacement of the outer rod 532 drives the valve core 62 to move axially, thereby changing the water flow rate of the slide valve assembly 6.

[0022] The structure of the base 10 and the drive mechanism for driving the grinding part 1 to move laterally along the base 10 are both prior art in the field. When performing the grinding rod 12 operation, the grinding part 1 moves along the base 10 to perform cutting processing on the clamped and fixed steel part.

[0023] Through the grinding resistance response rod 53 in the drive assembly 5, the drive motor 51 drives the outer rod 532 to rotate, and drives the grinding head 4 to work through the threaded guide structure between the inner and outer rods 532. When the grinding head 4 grinds to a rough area, the grinding resistance increases due to the surface condition of the workpiece. The rotation speed of the inner rod 531 lags behind that of the outer rod 532. The threaded guide structure then converts the torque difference between the two into axial thrust, causing the outer rod 532 to produce axial displacement and synchronously linking with the slide valve assembly 6 to increase the opening of the valve core 62. Through the grinding resistance response rod 53, the load change caused by the grinding resistance can be directly converted into a flow regulation action, realizing the adaptive matching of cooling water flow and cutting heat generation: automatically increasing the flow in the high resistance area to prevent workpiece burning and grinding head overheating, and automatically reducing the flow in the low resistance area to reduce media consumption, thereby ensuring processing quality while taking into account energy saving and environmental protection.

[0024] Preferably, the valve assembly 6 includes a hollow valve body 61 with a through hole 611 and a valve core 62 slidably disposed in the hollow valve body 61 and having a through hole 621. The axial position of the valve core 62 can change the effective overlapping area of ​​through hole one 611 and through hole two 621 to adjust the water flow of the slide valve assembly 6.

[0025] The slide valve assembly 6 mainly consists of a hollow valve body 61 fixedly mounted on the support structure of the grinding section 1 and a valve core 62 coaxially slidingly fitted inside the valve body. The side wall of the hollow valve body 61 has a radially formed through-hole 611 connecting to the water inlet pipe 63, while the corresponding position of the valve core 62 has a through-hole 621 connecting to the water outlet path. To ensure sealing performance, a dynamic sealing ring is preferably provided between the valve core 62 and the inner wall of the hollow valve body 61 to prevent axial leakage of liquid.

[0026] The axial position of the valve core 62 determines the relative overlapping area of ​​through hole one 611 and through hole two 621, i.e., the flow cross-section. Under no-load and low-resistance conditions, the valve core 62 is in its initial position, at which point through hole two 621 and through hole one 611 only slightly overlap to maintain minimum lubrication flow. When the grinding resistance increases, it drives the outer rod 532 to displace and move the valve core 62 in conjunction. The valve core 62 slides, causing through hole two 621 to gradually move towards the center position of through hole one 611. The effective overlapping area of ​​the two increases with the increase of displacement. The grinding resistance response rod 53 has a monotonically increasing adjustment characteristic for water flow as the grinding resistance increases, i.e., the greater the load, the greater the water flow. Limited by the movement distance of the spiral guide groove, when the guide block 535 on the outer rod 532 moves to the other end, the effective overlapping area of ​​through hole two 621 and through hole one 611 is at its maximum.

[0027] Preferably, the outer circumference of the outer rod 532 is fixedly sleeved with an external toothed ring sleeve 533, and the output end of the drive motor 51 is provided with a drive gear 52, which meshes with the external toothed ring sleeve 533. In order to ensure that power transmission is maintained during axial displacement, the effective axial meshing length of the external toothed ring sleeve 533 is configured to be greater than the maximum axial movement stroke of the outer rod 532.

[0028] The drive assembly 5 provides rotational power to the entire grinding section 1. The drive motor 51 is fixedly mounted on the side wall of the grinding head mounting frame 3, and its output shaft is connected to the drive gear 52. An external toothed ring sleeve 533 is fixedly sleeved on the outer circumferential surface of the outer rod 532 of the grinding resistance response rod 53. The external toothed ring sleeve 533 is engaged with the drive gear 52, thereby transmitting the rotational torque of the motor to the outer rod 532.

[0029] To avoid the risk of power interruption due to disengagement of the outer rod 532 from the drive gear 52 during axial displacement, the effective tooth surface length of the outer gear ring 533 along the axial direction is designed to be greater than the theoretical maximum axial travel of the outer rod 532 under the action of the threaded guide structure. This ensures that the drive gear 52 is always within the tooth width coverage of the outer gear ring 533, guaranteeing continuous and stable meshing between the drive gear 52 and the outer gear ring 533, and realizing continuous transmission of rotational power under variable resistance adjustment conditions.

[0030] Preferably, the inner cavity of the outer rod 532 is provided with a return spring 536. The return spring 536 is in a compressed state, and its two ends abut against the ends of the outer rod 532 and the inner rod 531 respectively, so as to provide a reverse thrust for the outer rod 532 to return when the grinding resistance decreases.

[0031] The reset spring 536 is provided to ensure that the grinding resistance response rod 53 can automatically return to its initial state when the load is reduced. The two ends of the reset spring 536 are respectively abutted against the ends of the outer rod 532 and the inner rod 531 through spring seats, so as not to interfere with the relative rotation of the outer rod 532 and the inner rod 531.

[0032] Preferably, the transmission assembly 7 includes a stroke amplification assembly 73, which includes a mounting rod 731 fixed to the outer wall of the slide valve assembly 6. The other end of the mounting rod 731 is rotatably connected to a shaft 732 and a large gear 733 and a small gear 734 fixed coaxially with the shaft 732. The outer rod 532 is connected to a toothed plate 71 that meshes with the small gear 734, and the valve core 62 is connected to a toothed plate 721 that meshes with the large gear 733. The stroke amplification assembly 73 is used to amplify the response sensitivity of the valve core 62 relative to the displacement of the outer rod 532. In terms of specific structure, the stroke amplification assembly 73 includes a mounting rod 731 fixedly mounted on the outer wall of the hollow valve body 61. The end of the mounting rod 731 is provided with a bearing seat, and a rotating shaft 732 is rotatably supported inside the bearing seat. A large gear 733 and a small gear 734 are coaxially fixed at both ends of the rotating shaft 732. The two gears rotate synchronously and have the same angular velocity. The diameter of the large gear 733 is larger than the diameter of the small gear 734.

[0033] A toothed plate 71 is fixedly connected to the top of the vertical rod that is rotatably connected to the end of the outer rod 532. The outer wall of the toothed plate 71 is in sliding fit with the mounting rod 731, so that the toothed plate 71 can only slide horizontally along the mounting rod 731. The toothed plate 71 is engaged with the pinion 734. A connecting rod 72 is connected to the end of the valve core 62 of the slide valve assembly 6. A toothed plate 721 is fixed to the end of the connecting rod 72. The toothed plate 721 is engaged with the large gear 733.

[0034] When the grinding resistance increases, causing a slight axial displacement in the outer rod 532, the toothed plate 71 drives the pinion 734 to rotate by a specific angle. Since the large gear 733 is coaxially fixed with the pinion 734, the large gear 733 rotates by the same angle, but due to its larger radius, the toothed plate 721 meshing with it will produce a linear displacement several times greater than the displacement of the outer rod 532, thus pulling the valve core 62 to move significantly. This effectively amplifies the responsiveness of the valve core 62 relative to the displacement of the outer rod 532, allowing even small load fluctuations to trigger sufficient valve opening changes.

[0035] Preferably, a rubber sleeve 81 made of elastic material is provided at the water outlet of the nozzle 8, and a squeezing component 9 is provided on the nozzle 8; The extrusion assembly 9 is linked with the valve core 62 and is configured to simultaneously extrude the rubber sleeve 81 while the water flow rate of the slide valve assembly 6 increases, so as to limit the water outlet section and thereby increase the jet velocity. The extrusion assembly 9 includes a bidirectional lead screw 92 and extrusion plates 93 that are threadedly connected to the bidirectional lead screw 92. The bidirectional lead screw 92 is driven by the displacement of the valve core 62 through a gear transmission structure, which converts the linear motion of the valve core 62 into a clamping force on the rubber sleeve 81. The gear transmission structure includes two sets of transmission teeth 94, which are fixedly connected to one end of the bidirectional lead screw 92 near the slide valve assembly 6, and can drive the bidirectional lead screw 92 to rotate synchronously. The drive rack 95 is slidably disposed at the bottom of the nozzle 8 and simultaneously engaged with two sets of transmission teeth 94. One end of the drive rack 95 extends and is connected to the transmission assembly 7. It is configured such that when the valve core 62 moves, it drives the drive rack 95 to move linearly, thereby driving the transmission teeth 94 to rotate, and finally driving the bidirectional lead screw 92 to perform the opening and closing control of the extrusion plate 93.

[0036] The nozzle 8 has a rubber sleeve 81 made of highly elastic and wear-resistant material fitted at the water outlet. The rubber sleeve 81 has a certain degree of flexibility and can undergo elastic deformation when squeezed by external force to change the shape of the water outlet cross section, and quickly rebound to its original position after the external force is removed.

[0037] In conjunction with the rubber sleeve 81, the nozzle 8 is equipped with an extrusion assembly 9. The extrusion assembly 9 includes a bidirectional lead screw 92 disposed on both sides of the nozzle 8. The two ends of the bidirectional lead screw 92 are rotatably mounted on the ear plate 91 at the bottom of the nozzle 8 via bearing seats. The symmetrical threaded outer surfaces of the bidirectional lead screw 92 are screwed to two extrusion plates 93, which are located on opposite sides of the rubber sleeve 81.

[0038] The end of the bidirectional lead screw 92 near the slide valve assembly 6 is connected to a transmission gear 94. A drive rack 95 is slidably mounted on the bottom of the nozzle 8 via a slide rail, and the drive rack 95 is engaged with the transmission gear 94. One end of the drive rack 95 is connected to the toothed plate 721 via a connecting rod.

[0039] When the grinding resistance increases, causing the valve core 62 to move to increase the flow rate, the valve core 62 synchronously drives the drive rack 95 to move linearly. The linear motion of the drive rack 95 drives the transmission gear 94 to rotate, which in turn drives the double-acting screw 92 to rotate. The rotation of the double-acting screw 92 drives the two extrusion plates 93 to move synchronously inward along the axial direction, thereby applying a clamping force to the rubber sleeve 81 located in the middle. The rubber sleeve 81 is compressed and flattened, and its outlet cross-sectional area decreases accordingly.

[0040] As the flow rate of water increases in the slide valve assembly 6, the rubber sleeve 81 is simultaneously squeezed to restrict the water outlet cross section, thereby increasing the liquid flow velocity through the nozzle 8. The linear displacement of the valve core 62 is converted into a clamping force on the rubber sleeve 81, ensuring that when cleaning the high-heat, high-resistance grinding area, the cooling water can be flushed with extremely high kinetic energy, effectively removing cutting heat and adhering grinding debris.

[0041] Preferably, the buffer support 2 includes a sleeve 21, a slide rod 22, and a partition 23 that divides the sleeve 21 into a spring chamber and a hydraulic chamber; the slide rod 22 is connected to a piston rod 24 that passes through the partition 23 and a plug 26 located in the hydraulic chamber; the hydraulic chamber is connected to the water inlet pipe 63 through a connecting valve 27 with a throttling function.

[0042] The buffer support 2 includes a hollow sleeve rod 21 fixedly connected to the top of the column, and a sealing partition 23 is fixedly installed inside it. The partition 23 divides the inner cavity of the sleeve rod 21 into a spring buffer cavity near the grinding head and a hydraulic buffer cavity located at the rear.

[0043] The slide rod 22 is slidably inserted into the spring buffer cavity, and its front end extends out into the sleeve rod 21 and is fixedly connected to the grinding head mounting frame 3. Inside the spring buffer cavity, a high-strength buffer spring 25 is provided between the slide rod 22 and the partition plate 23 to withstand the cutting reaction force of the grinding head 4 and to allow the grinding head 4 to elastically retract when subjected to radial hard impact.

[0044] To suppress the simple harmonic vibrations that may occur in a pure spring structure, this embodiment introduces a hydraulic damping mechanism. A slender piston rod 24 is connected to the tail end of the slide rod 22. This piston rod 24 extends through a sealing hole in the center of the partition 23 into the rear hydraulic buffer chamber, and a plug 26 is fixed at its end. The outer diameter of the plug 26 slides in contact with the inner wall of the hydraulic buffer chamber.

[0045] The hydraulic buffer chamber is connected to the external water inlet pipe 63 via a connecting valve 27 mounted on the side wall. This connecting valve 27 has a small-diameter throttling orifice for throttling. When the grinding head 4 vibrates, causing the slide rod 22 to drive the plug 26 to move rapidly back and forth within the hydraulic chamber, the fluid in the hydraulic chamber must enter and exit the water inlet pipe 63 through the throttling orifice of the connecting valve 27. The viscous resistance generated by the fluid flowing through the throttling orifice dissipates vibration energy, thus forming a hydraulic shock absorber. Existing cooling water is used as the hydraulic medium, eliminating the need for a separate hydraulic oil station.

[0046] Preferably, the threaded guide structure includes a spiral guide groove 534 formed on the outer wall of the inner rod 531 and a guide block 535 fixed on the inner wall of the outer rod 532; the spiral direction of the spiral guide groove 534 is configured such that when the grinding head 4 is obstructed and decelerated, the outer rod 532 is driven to move closer to the grinding head 4.

[0047] When the grinding head 4 contacts the workpiece and the cutting resistance increases, the grinding head 4 and the inner rod 531 are obstructed and tend to lag, while the outer rod 532 driven by the motor maintains its original speed due to inertia and power input, so that the outer rod 532 "rotates ahead" of the inner rod 531.

[0048] Utilizing the principle of inclined planes, the guide block 535 slides relative to the spiral guide groove 534, decomposing the torque difference in the rotational direction into an axial component force. In this embodiment, when the outer rod 532 rotates ahead of the inner rod 531, the instantaneous increase in resistance generates a momentary speed difference, resulting in a phase change. This forces the outer rod 532 to overcome the resistance of the return spring 536 and displace axially towards the grinding head 4; thereby pushing the outer rod to move. When the spring force and the axial component force are balanced, the two resume synchronous rotation. Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0049] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A steel grinding device for the production of engineering machinery, comprising a base (10), wherein a clamping member (11) is disposed on the base (10) and a grinding part (1) movable along the base (10); characterized in that, The polishing part (1) includes: The column is vertically mounted on the base (10); Grinding head mounting frame (3); A buffer support (2) is connected between the column and the grinding head mounting frame (3); The drive assembly (5) is mounted on the grinding head mounting frame (3) and is used to drive the grinding head (4) to rotate; The slide valve assembly (6) has an inlet end and an outlet end, and the outlet end is connected to a nozzle (8). The drive assembly (5) includes a drive motor (51) and a grinding resistance response rod (53) connected between the output end of the drive motor (51) and the grinding head (4); the grinding resistance response rod (53) includes an inner rod (531) coaxially connected to the grinding head (4) and an outer rod (532) sleeved on the outer periphery of the inner rod (531). A threaded guide structure is provided between the inner rod (531) and the outer rod (532). The threaded guide structure includes a spiral guide groove (534) provided on the outer wall of the inner rod (531) and a guide block (535) provided on the inner wall of the outer rod (532) and cooperating with the spiral guide groove (534). The threaded guide structure is configured such that when the inner rod (531) and the outer rod (532) rotate relative to each other in the rotation direction, the outer rod (532) is driven to produce an axial displacement relative to the inner rod (531). The outer rod (532) is mechanically linked to the valve core (62) of the slide valve assembly (6) through the transmission assembly (7), so that the axial displacement of the outer rod (532) drives the valve core (62) to move axially, thereby changing the water flow rate of the slide valve assembly (6).

2. The steel grinding equipment for engineering machinery production as described in claim 1, characterized in that, The slide valve assembly (6) includes a hollow valve body (61) with a through hole one (611) and a valve core (62) that is slidably disposed in the hollow valve body (61) and has a through hole two (621). The axial position of the valve core (62) can change the effective overlapping area of ​​the through hole one (611) and the through hole two (621) to adjust the water flow of the slide valve assembly (6). The axial displacement of the outer rod (532) is transmitted to the valve core (62) through the transmission assembly (7), so that the moving direction of the valve core (62) is consistent with the changing direction of the water flow.

3. The steel grinding equipment for engineering machinery production as described in claim 1, characterized in that, The outer rod (532) is fixedly sleeved with an external toothed ring sleeve (533) on its outer periphery. The output end of the drive motor (51) is provided with a drive gear (52), which meshes with the external toothed ring sleeve (533). In order to ensure power transmission during axial displacement, the effective axial meshing length of the external toothed ring sleeve (533) is configured to be greater than the maximum axial movement stroke of the outer rod (532).

4. The steel grinding equipment for engineering machinery production as described in claim 1, characterized in that, The outer rod (532) is provided with a return spring (536) in its inner cavity. The return spring (536) is in a compressed state, and its two ends abut against the ends of the outer rod (532) and the inner rod (531) respectively. It is used to provide a reverse thrust for the outer rod (532) to return when the grinding resistance decreases.

5. The steel grinding equipment for engineering machinery production as described in claim 1, characterized in that, The transmission assembly (7) includes a stroke amplification assembly (73), which includes a mounting rod (731) fixed on the outer wall of the slide valve assembly (6). The other end of the mounting rod (731) is rotatably connected to a shaft (732) and a large gear (733) and a small gear (734) coaxially fixed with the shaft (732). The outer rod (532) is connected to a toothed plate (71) that meshes with the small gear (734), and the valve core (62) is connected to a toothed plate (721) that meshes with the large gear (733). The stroke amplification assembly (73) is used to amplify the response sensitivity of the valve core (62) relative to the displacement of the outer rod (532).

6. The steel grinding equipment for engineering machinery production as described in claim 1, characterized in that, The nozzle (8) is provided with a rubber sleeve (81) made of elastic material at the outlet, and the nozzle (8) is provided with a squeezing component (9). The extrusion assembly (9) is linked with the valve core (62) and is configured to simultaneously extrude the rubber sleeve (81) while the water flow rate of the slide valve assembly (6) increases, so as to limit the water outlet cross section and thereby increase the jet flow rate.

7. The steel grinding equipment for engineering machinery production as described in claim 6, characterized in that, The extrusion assembly (9) includes a bidirectional lead screw (92) and extrusion plates (93) that are threadedly connected to the bidirectional lead screw (92). The bidirectional lead screw (92) is driven by the displacement of the valve core (62) through a gear transmission structure, which converts the linear motion of the valve core (62) into a clamping force on the rubber sleeve (81).

8. The steel grinding equipment for engineering machinery production as described in claim 7, characterized in that, The gear transmission structure includes two sets of transmission teeth (94), which are fixedly connected to one end of the bidirectional lead screw (92) near the slide valve assembly (6), and can drive the bidirectional lead screw (92) to rotate synchronously; The drive rack (95) is slidably disposed at the bottom of the nozzle (8) and simultaneously engaged with the two sets of transmission teeth (94); one end of the drive rack (95) extends and is connected to the transmission assembly (7), and is configured such that when the valve core (62) moves, it drives the drive rack (95) to move linearly, thereby driving the transmission teeth (94) to rotate, and finally driving the bidirectional screw (92) to perform the opening and closing control of the extrusion plate (93).

9. The steel grinding equipment for engineering machinery production as described in claim 1, characterized in that, The buffer support (2) includes a sleeve (21), a slide rod (22), and a partition (23) that divides the sleeve (21) into a spring chamber and a hydraulic chamber; the slide rod (22) is connected to a piston rod (24) that passes through the partition (23) and a plug (26) located in the hydraulic chamber; the hydraulic chamber is connected to the water inlet pipe (63) through a connecting valve (27) with a throttling function.

10. The steel grinding equipment for engineering machinery production as described in claim 1, characterized in that, The threaded guide structure includes a spiral guide groove (534) formed on the outer wall of the inner rod (531) and a guide block (535) fixed on the inner wall of the outer rod (532); the spiral direction of the spiral guide groove (534) is configured such that when the grinding head (4) is obstructed and decelerated, the outer rod (532) is driven to move closer to the grinding head (4).

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