A precision grinding machine for die steel production

Abstract

The application relates to the technical field of die steel production, in particular to a fine grinding machine for die steel production, which comprises a main machining machine tool, a machine tool moving guide rail platform at both ends and a workpiece transmission machine table outside; the main machining machine tool comprises a main support base, a machine tool support foot pad, a fine grinding compartment base and a fine grinding machining compartment at the top; a workpiece support carrier assembly, a plurality of fine grinding machining units and a cold air circulating device are arranged in the fine grinding machining compartment; the units and the cold air device are staggered and arranged in sequence along the carrier. The fine grinding machining unit comprises an internal fixed frame of the unit, an upper and lower support frame and a transmission belt roller, and a fine grinding machining belt is arranged around; a connecting rod transmission assembly drives the lower transmission belt roller to adjust the fine grinding speed and direction; the upper support frame adjusts the position of the upper transmission belt roller to change the fine grinding direction; guide limiting wheels at both sides of the unit limit the edges of the fine grinding belt, so that the track stability is ensured. The design reduces heat accumulation through instant cooling, solves the die steel thermal deformation, realizes dynamic parameter adjustment and high-precision grinding.

Description

Technical Field

[0001] This invention relates to the field of mold steel production technology, specifically a precision grinding machine for mold steel production. Background Technology

[0002] As a key material for manufacturing various molds, mold steel plays a vital role in numerous fields such as machinery manufacturing, automotive industry, and aerospace. The quality and performance of molds directly affect the precision, surface quality, and production efficiency of products, and the machining precision of mold steel is one of the core factors determining mold quality. Precision grinding can significantly improve the surface finish, dimensional accuracy, and shape accuracy of mold steel, ensuring that it meets the requirements of high-precision mold manufacturing. In the field of precision machining of mold steel, the precision grinding process is a crucial step in ensuring the dimensional accuracy, surface quality, and microstructure stability of workpieces.

[0003] Traditional precision grinding equipment for mold steel typically employs continuous grinding followed by centralized cooling, or relies on dispersed cooling devices, resulting in the inability to dissipate heat generated during grinding in a timely manner. Due to the poor thermal conductivity of mold steel (such as high-carbon high-alloy steel), heat easily accumulates inside the workpiece during prolonged continuous grinding or heavy-duty machining, leading to excessively high peak temperatures in the grinding zone. This, in turn, causes microstructural burns and macroscopic thermal deformation, severely impacting workpiece performance and service life. Furthermore, traditional precision grinding equipment often uses grinding wheels as the grinding medium. While their rigid structure ensures a certain level of processing efficiency, their insufficient ductility and microstructural consistency make them unsuitable for processing complex-shaped workpieces or materials with varying hardness. Summary of the Invention

[0004] The purpose of this invention is to provide a precision grinding machine for mold steel production, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A precision grinding machine for mold steel production includes a main machining center, two machine tool moving guide platforms located at both ends of the main machining center, and two workpiece transfer tables located outside the two machine tool moving guide platforms. The main machining center includes a main support base, machine tool support feet located on both sides of the main support base, a precision grinding chamber base located on the main support base, and a precision grinding chamber located on top of the precision grinding chamber base. The workpiece transfer tables are mounted on the transfer table support base located on the machine tool support feet. The machine tool is characterized in that...

[0007] The precision grinding chamber is equipped with a workpiece support carrier assembly, several precision grinding units, and several air circulation devices. The workpiece support carrier assembly is installed at the bottom of the precision grinding chamber and its two ends are respectively connected to the corresponding machine tool moving guide rail platform. The several precision grinding units are installed above the workpiece support carrier assembly. The several air circulation devices are suspended at the top of the inner cavity of the precision grinding chamber.

[0008] The precision grinding units and the air circulation devices are arranged in a staggered manner along the direction of the workpiece support carrier assembly. Each precision grinding unit is followed by an air circulation device, and the next precision grinding unit is followed by each air circulation device.

[0009] As a further aspect of the present invention: the precision grinding unit includes:

[0010] Internal fixed frame of the unit;

[0011] The lower support frame located below the fixed frame inside the unit and the lower drive belt roller supported thereon;

[0012] An upper support frame located above a fixed frame inside the unit and an upper drive belt roller supported thereon;

[0013] A precision-ground belt wound around the lower and upper drive belt rollers;

[0014] A linkage drive assembly is located on the side of the fixed frame inside the unit. The linkage drive assembly is used to drive the lower drive belt roller to rotate in order to adjust the fine grinding rate and direction of the fine grinding belt.

[0015] The guide limit wheels, located on both sides of the fixed frame inside the unit and driven by the upper support frame, are used to limit the edge of the precision-ground belt.

[0016] The upper support frame is used to adjust the position of the upper transmission belt roller to change the fine grinding orientation of the fine grinding belt.

[0017] As a further aspect of the present invention: the linkage transmission assembly includes:

[0018] A drive shaft located on the side edge of a fixed frame inside the unit;

[0019] A connecting rotating bolt located at the end of the transmission shaft;

[0020] The transmission drive link is mounted on the connecting rotating bolt;

[0021] A swing drive arm installed at the swing end of the transmission drive link;

[0022] The lower support frame is provided with a bottom support rod at the bottom, and a steering connecting sleeve is installed at the top of the bottom support rod through a swing joint; the end of the rotating shaft section of the lower transmission belt roller is fixed inside the steering connecting sleeve; the swing drive arm is connected to the steering connecting sleeve.

[0023] As a further aspect of the present invention: the upper support frame includes:

[0024] Frame support base;

[0025] A steering adjustment device and an adjustment rotating shaft driven by its drive end, mounted on a frame support base;

[0026] Steering support base installed on the frame support base;

[0027] A swing drive frame is mounted on a steering support base, and the end of the adjusting rotation shaft is connected to the swing drive frame;

[0028] The end support rod of the shaft frame located at the top of the swing drive frame is used to support the roller mounting bracket of the upper drive belt roller.

[0029] As a further embodiment of the present invention: the guide limiting wheel includes a wheel body mounting seat, a wheel hub disposed on the wheel body mounting seat, and a left half guide wheel and a right half guide wheel coaxially sleeved on the wheel hub; a guide limiting gap is formed between the left half guide wheel and the right half guide wheel for fine grinding and embedding of the edge line; the wheel body mounting seat is fixed to a side edge protection bracket connected to the side edge of the swing drive frame.

[0030] As a further aspect of the present invention: the main body of the cold air circulation device is a cold air storage box; the top of the cold air storage box is provided with a cold air delivery nozzle, and the bottom is provided with an airflow diffusion guide plate; the cold air storage box is generally flat and trapezoidal, and the thickness of the internal space gradually decreases and the width gradually increases from the end where the cold air delivery nozzle is located to the end where the airflow diffusion guide plate is located; the airflow diffusion guide plate is an inclined strip structure; the cold air storage box is suspended on a top hoisting bracket provided at the top of the inner cavity of the precision grinding chamber by several hoisting connecting rods arranged around it.

[0031] As a further aspect of the present invention: the workpiece transfer machine includes:

[0032] Main support frame of the machine tool;

[0033] An internal support frame plate located along the inner edge of the main support frame of the machine tool;

[0034] Several workpiece transfer rollers are installed in parallel between the internal support frame plates, with their roller ends passing through the main support frame of the machine platform and driven synchronously by a gear belt.

[0035] Lateral protective supports are installed on both sides below the main support frame of the machine tool.

[0036] An adjusting screw is located between the two lateral protective supports and a bottom limiting base is movably mounted on the adjusting screw;

[0037] Several lateral limiting guide wheels are provided on the top of the bottom limiting base frame. The lateral limiting guide wheels on the same side are arranged in a row. The lateral limiting guide wheels pass through the gap between the rollers of the workpiece transfer roller and are used to fit the two sides of the mold steel workpiece.

[0038] As a further aspect of the present invention: the workpiece support carrier assembly includes:

[0039] The main base of the vehicle is located on both sides of the base of the precision grinding chamber;

[0040] Structural reinforcement blocks and internal support frames installed on the main base of the vehicle;

[0041] Several support conveyor rollers are installed between the internal support base frames on both sides; each support conveyor roller is in a group of two, and each group of support conveyor rollers is equipped with a workpiece clamping and positioning plate through a synchronous transmission wheel;

[0042] An internal sliding guide rail is located on the inner edge of the internal support base; the workpiece clamping positioning plate is slidably installed on the internal sliding guide rail to adjust the spacing of each set of support conveyor rollers.

[0043] As a further embodiment of the present invention: a lateral auxiliary support frame is installed on the inner wall of the precision grinding chamber; one end of the internal fixed frame of the unit is fixedly installed on the lateral auxiliary support frame, and the other end is supported by the lower support frame; the bottom of the lower support frame is fixed to the internal support base frame on the corresponding side.

[0044] One end of the support shaft section of the lower drive belt roller is provided with a rotating shaft section, which is mounted on the lower support frame by bearings; the other end of the support shaft section is provided with a shaft end support; the main base of the carrier is provided with a support fixing seat and several fixed support bearings thereon, and the shaft end support is fixedly installed on the corresponding fixed support bearings.

[0045] As a further embodiment of the present invention: a frame connecting fixing seat is provided in the middle position of the fixed frame inside the unit; a lifting drive cylinder and a lifting drive push rod driven by the cylinder are installed on the frame connecting fixing seat; the bottom of the roller body mounting bracket of the upper transmission belt roller is supported on the support end of the lifting drive push rod by a flip support bracket.

[0046] Compared with the prior art, the beneficial effects of the present invention are:

[0047] This invention designs an interleaved multi-stage grinding cooling principle. By using an interleaved arrangement of "precision grinding unit - cold air circulation device" along the workpiece support carrier, it achieves immediate and powerful cooling after local grinding. This principle breaks through the traditional cooling method after continuous grinding, enabling rapid cooling before the heat from a single grinding cycle accumulates and diffuses in large quantities within the workpiece. This minimizes the peak temperature in the grinding zone and, in particular, solves the problem of microstructure burns and macroscopic thermal deformation caused by heat accumulation that easily occurs in mold steel during long-term continuous grinding and heavy-load grinding.

[0048] Each precision grinding unit integrates an upper support frame, a connecting rod transmission assembly, and guide limit wheels: the upper support frame adjusts the working angle of the grinding belt, and the connecting rod transmission assembly precisely controls the linear speed and direction; these two are the core process parameter adjustments. The guide limit wheels move synchronously with the angle adjustment to ensure high stability of the grinding belt trajectory. This configuration gives the grinding machine dynamic adjustment capabilities, allowing it to switch grinding modes in a single operation based on the shape and hardness of the workpiece area, achieving flexible machining.

[0049] The use of a precision grinding belt instead of a traditional grinding wheel provides better ductility and micro-uniformity. The guide limit wheels on both sides actively constrain and correct the trajectory to resist sway or vibration. They are the core mechanical constraints for controlling grinding accuracy and ensuring the positional accuracy of the grinding surface.

[0050] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0051] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Furthermore, these drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments.

[0052] Figure 1 This is a schematic diagram of the overall structure of a precision grinding machine for producing mold steel, provided in an embodiment of the present invention.

[0053] Figure 2 This is a schematic diagram of the structure of the precision grinding chamber provided in an embodiment of the present invention.

[0054] Figure 3 This is an installation diagram of the air circulation device and the precision grinding unit provided in the embodiments of the present invention.

[0055] Figure 4 This is a schematic diagram of the structure of the workpiece transfer machine provided in an embodiment of the present invention.

[0056] Figure 5 This is a schematic diagram of the structure of the air cooling circulation device provided in an embodiment of the present invention.

[0057] Figure 6 This is a schematic diagram of the workpiece support carrier assembly provided in an embodiment of the present invention.

[0058] Figure 7 This is a schematic diagram of the structure of the lower drive belt roller provided in an embodiment of the present invention.

[0059] Figure 8 This is a schematic diagram of the linkage transmission assembly provided in an embodiment of the present invention.

[0060] Figure 9 This is a schematic diagram of the upper drive belt roller provided in an embodiment of the present invention.

[0061] Figure 10 For the present invention Figure 9 A schematic diagram of the structure of region A in the middle.

[0062] Figure 11 This is a schematic diagram of the guide wheel provided in an embodiment of the present invention.

[0063] In the diagram: 1. Main machining tool; 11. Main support base; 12. Machine tool support feet; 13. Precision grinding chamber base; 14. Transfer table support base; 15. Precision grinding chamber; 16. Top hoisting bracket; 17. Lateral auxiliary support frame; 2. Machine tool moving guide rail platform; 3. Workpiece transfer table; 31. Main support frame of the machine table; 32. Internal support frame plate; 33. Workpiece transfer roller; 34. Lateral protective bracket; 35. Bottom limiting base frame; 36. Lateral limiting guide wheel; 37. Adjusting screw; 4. Cold air circulation device 41. Cold air conveying nozzle; 42. Cold air storage box; 43. Airflow diffuser; 44. Lifting connecting rod; 5. Workpiece support carrier assembly; 51. Carrier main base; 52. Structural reinforcing block; 53. Internal support base frame; 54. Internal sliding guide rail; 55. Support conveying roller; 56. Synchronous transmission wheel; 57. Workpiece clamping positioning plate; 58. Support fixing seat; 59. Fixed support bearing; 6. Precision grinding unit; 61. Internal fixing frame of the unit; 611. Frame connecting fixing seat; 612. Top 613. Lifting drive cylinder; 614. Lifting drive push rod; 62. Tilting support bracket; 63. Linkage transmission assembly; 64. Transmission shaft; 65. Connecting rotating bolt; 66. Transmission drive link; 67. Swing drive arm; 68. Bottom support rod; 69. Steering connecting sleeve; 60. Lower transmission belt roller; 61. Support shaft section; 62. Shaft end support; 63. Rotating shaft section; 64. Lower roller body; 65. Guide limit wheel; 66. Wheel body mounting seat; 67. Wheel hub; 68. Left half guide wheel. 644. Right half guide wheel; 645. Guide limit gap; 65. Upper support frame; 651. Frame support base; 652. Steering adjustment device; 653. Adjustment rotating shaft; 654. Swing drive frame; 655. Steering support base; 656. Shaft end support rod; 657. Lateral side bracket; 658. Side edge protection bracket; 66. Upper transmission belt roller; 661. Upper roller body; 662. Roller body support shaft; 663. Roller body mounting bracket; 67. Lower support frame; 7. Precision ground belt. Detailed Implementation

[0064] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, examples of which are illustrated in the drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or identical elements.

[0065] Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0066] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0067] Example 1, please refer to Figures 1-3 A precision grinding machine for mold steel production is provided, comprising a main machining tool 1, a machine tool moving guide platform 2, and two workpiece transfer tables 3 arranged side by side. The main machining tool 1 is the core support and processing unit of the entire grinding machine. Its basic structure consists of a main support base 11, with machine tool support feet 12 installed on both sides of the bottom of the main support base 11 to stabilize and support the entire equipment and adjust its level. A precision grinding chamber base 13 is fixedly installed at the top center of the main support base 11. At the same time, a raised transfer table support base 14 is provided above the corresponding position of each machine tool support foot 12. The two workpiece transfer tables 3 are respectively mounted on the corresponding transfer table support bases 14 for conveying the mold steel workpieces to be processed and those that have already been processed. At each end of the length direction of the precision grinding chamber base 13, one of the machine tool moving guide platforms 2 is fixedly installed (i.e., two in total). The structural design of each machine tool moving guide platform 2 ensures that it can be precisely and seamlessly connected and docked with the corresponding workpiece transfer platform 3 to form a continuous material transfer channel, which facilitates the smooth and accurate transfer of workpieces between the conveying and processing areas.

[0068] A sealed precision grinding chamber 15 is installed on top of the precision grinding chamber base 13 to provide a stable environment for precision grinding operations. The internal space of the precision grinding chamber 15 integrates core processing, workpiece support, and environmental control components.

[0069] The workpiece support carrier assembly 5 is fixedly installed in the central area of ​​the bottom of the precision grinding chamber 15, providing precise and stable support and positioning for the mold steel workpiece during grinding. The workpiece support carrier assembly 5 has openings at both ends along its length, and its structural design allows both ends to precisely connect with the left and right machine tool moving guide rail platforms 2, ensuring smooth input and output of the workpiece to the precision grinding station via the guide rail platforms. Inside the precision grinding chamber 15, along the longitudinal direction of the workpiece support carrier assembly 5 (i.e., the workpiece conveying and processing direction), multiple precision grinding units 6 and multiple air circulation devices 4 are arranged. These precision grinding units 6 and air circulation devices 4 are arranged in a staggered manner. Specifically, looking along the workpiece processing direction: a air circulation device 4 is located immediately behind the first precision grinding unit 6, and the next precision grinding unit 6 is immediately behind the air circulation device 4, and so on in a staggered manner. All the air circulation devices 4 are installed and fixed to the top of the inner cavity of the precision grinding chamber 15 by means of hoisting, so that their efficient cold air can cover the workpiece grinding area below from above. All the precision grinding units 6 are installed and fixed inside the precision grinding chamber 15 by their respective support structures, and are precisely positioned directly above the workpiece support carrier assembly 5, so that their grinding action point can accurately act on the surface of the workpiece supported on the workpiece support carrier assembly 5.

[0070] Each precision grinding unit 6 is an execution unit for achieving high-precision grinding. Its structure includes a rigid internal fixed frame 61, which provides structural support for the entire unit. Above the internal fixed frame 61, an upper support frame 65 is provided via a movable connecting mechanism. An upper drive belt roller 66 is rotatably mounted on this upper support frame 65. Correspondingly, a lower support frame 67 is also provided below the internal fixed frame 61. A rotatable lower drive belt roller 63 is mounted on the lower support frame 67. A continuous precision grinding belt 7 with specified abrasive characteristics is fitted between the upper drive belt roller 66 and the lower drive belt roller 63. By driving one of the belt rollers to rotate through a transmission system, the precision grinding belt 7 can be driven to circulate at high speed, and its working section can grind the workpiece. The key structural feature is that the upper support frame 65 is positionally adjustable relative to the internal fixed frame 61 of the unit. This adjustment changes the spatial position of the upper drive belt roller 66 relative to the lower drive belt roller 63, thereby precisely adjusting the working angle of the grinding section of the fine grinding belt 7 to adapt to the grinding requirements of different workpiece surfaces. A linkage transmission assembly 62 is also installed on the internal fixed frame 61 of the unit. Its function is to directly connect to and control the rotation of the lower drive belt roller 63. The linkage transmission assembly 62 allows for stepless or stepped adjustment of the rotation speed of the lower drive belt roller 63, thereby precisely controlling the linear speed (fine grinding rate) of the fine grinding belt 7 and its rotation direction (fine grinding direction, such as clockwise or counterclockwise grinding) to meet the optimal grinding conditions for different materials and precision requirements. Furthermore, at least one pair of guide limit wheels 64 are symmetrically arranged on both sides of the internal fixed frame 61 of the unit (usually corresponding to both sides of the running direction of the fine grinding belt 7). These guide and limiting wheels 64 are connected to the drive mechanism that adjusts the upper drive belt roller 66 via a linkage mechanism, ensuring that the guide and limiting wheels 64 move synchronously when the position of the upper drive belt roller 66 is adjusted to change the grinding orientation of the grinding belt 7. The function of the guide and limiting wheels 64 is to approach and constrain the two sides or specific positions of the grinding belt 7, applying guiding and lateral limiting forces to the high-speed running belt, ensuring that the grinding belt 7 maintains a precise trajectory and smooth operation even after angle or position adjustments, without swaying or twisting, thereby controlling the overall grinding accuracy and preventing workpiece deviation caused by misalignment.

[0071] The working process of this embodiment is designed as follows:

[0072] 1. Workpiece transfer and loading: The mold steel workpiece to be precision ground is first placed on one of the workpiece transfer stations 3. The workpiece transfer station 3 is started, and the workpiece is smoothly transported to the inlet end of the machine tool moving guide platform 2 that is connected to it.

[0073] 2. Entering the fine grinding zone: The machine tool moving guide platform 2 operates, receiving and continuing to transport the workpiece. Through its interface with the workpiece support carrier assembly 5, the workpiece is precisely transported into the fine grinding chamber 15 and positioned on the workpiece support carrier assembly 5. At the same time or slightly earlier, the workpiece transfer station 3 at the other end prepares to receive the processed workpiece (this process is coordinated by the control system during continuous processing).

[0074] 3. Multi-stage Precision Grinding and Cooling: The workpiece, positioned on the workpiece support assembly 5, moves at a constant speed along the direction (usually longitudinally) of the workpiece support assembly 5, driven by the drive device (or via the workpiece's own conveying device, such as rollers or chains). When the workpiece moves below the first precision grinding unit 6, the precision grinding belt 7 of this unit performs the first precision grinding on the workpiece surface at high speed, removing excess material and improving surface flatness. Immediately afterwards, the workpiece moves into the area below the first cold air circulation device 4. This device is activated, forcefully blowing low-temperature cold air downwards onto the workpiece's freshly ground surface for forced cooling, quickly removing the localized high heat generated by grinding, effectively suppressing workpiece thermal deformation and preventing burns. Subsequently, the workpiece enters the area below the next precision grinding unit 6 for a second precision grinding operation, further improving accuracy and surface quality, and then undergoes another cooling cycle through the next cold air circulation device 4. The above-mentioned staggered arrangement of "fine grinding (unit) - cooling (device) - fine grinding (unit) - cooling (device)..." is repeated until the workpiece passes through all the preset processing and cooling stations in the fine grinding chamber 15 in sequence, completing the entire fine grinding process.

[0075] 4. Fine Grinding Process Control: When each fine grinding unit 6 grinds a workpiece: a. The position of the upper drive belt roller 66 can be dynamically changed by adjusting the position of the upper support frame 65 of the unit according to the specific requirements of the current workpiece, thereby adjusting the fine grinding orientation (contact angle) between the fine grinding belt 7 and the workpiece in real time. b. By controlling the linkage transmission assembly 62 of the unit, the speed and rotation direction of the lower drive belt roller 63 can be adjusted, thereby precisely controlling the fine grinding rate (linear speed) and fine grinding direction (clockwise / counterclockwise) of the fine grinding belt 7. c. During the adjustments in items a and b above, the guide limit wheel 64 moves automatically and synchronously under the action of the drive mechanism, always applying constraint force to both sides of the fine grinding belt 7 to ensure that the belt position is accurate and stable, without swaying, and ensuring the accuracy of controlling the grinding trajectory.

[0076] 5. Workpiece Output: After precision grinding and cooling, the workpiece is moved out from the other end by the workpiece support carrier assembly 5 and smoothly transferred to the corresponding workpiece transfer machine 3 via the machine tool moving guide platform 2 at that end. The workpiece transfer machine 3 then starts and transports the precision-ground mold steel workpiece off the production line.

[0077] This embodiment employs a staggered multi-stage grinding cooling principle. By strictly adhering to the staggered arrangement of the precision grinding unit 6 and the cooling air circulation device 4 along the workpiece support assembly 5 in the sequence of "grinding unit - cooling device - grinding unit - cooling device - ...", targeted and powerful cooling is immediately implemented after each local grinding operation. This principle breaks through the traditional continuous grinding (post-cooling) or dispersed cooling methods, achieving rapid cooling before the heat from a single grinding operation accumulates and diffuses significantly within the workpiece. This minimizes the peak temperature in the grinding zone and effectively solves the problems of microstructural burns (tempering or secondary quenching) and macroscopic thermal deformation caused by heat accumulation, which are prone to occur in mold steel during long-term continuous grinding and heavy-load grinding.

[0078] Each precision grinding unit 6 integrates an upper support frame 65, a connecting rod drive assembly 62, and a guide limit wheel 64. The position adjustment of the upper support frame 65 changes the working angle of the grinding belt (precision grinding direction), while the connecting rod drive assembly 62 precisely controls the linear speed (precision grinding rate) and direction (precision grinding direction) of the grinding belt. These two actions are the core process parameter adjustments. The guide limit wheel 64 is a crucial safety mechanism; it moves synchronously with the angle adjustment action, ensuring that the grinding belt's trajectory remains highly stable when changing the grinding angle and speed. This principle gives the grinding machine the ability to adjust process parameters instantly and dynamically, allowing for switching between different grinding modes (angle, speed, direction) within a single processing cycle based on the shape of different areas of the workpiece, changes in material hardness, or special precision requirements, achieving flexible processing.

[0079] This embodiment uses a precision grinding belt 7 as the grinding medium, which has better ductility and microstructure consistency compared to traditional grinding wheels. Guide and limiting wheels 64, positioned at key locations (both sides) along the grinding belt's path, actively apply constraint forces under varying machining parameters or long-term working loads, continuously correcting the grinding belt's trajectory and effectively resisting potential wobble or vibration. This principle directly ensures the positional accuracy of the grinding line / surface and is the core mechanical constraint mechanism for controlling grinding accuracy.

[0080] The embodiments of the present invention provide an efficient solution for the precision grinding of mold steel, especially high-precision, complex-shaped mold steel parts, through the above-mentioned innovative mechanical structure layout, dynamic parameter adjustment and precision assurance mechanism, and the accompanying efficient thermal management process. It comprehensively achieves multiple goals of high efficiency, high quality (high precision, no thermal damage), high flexibility and high equipment durability.

[0081] Example 2, please refer to Figure 1 and Figure 4 This embodiment further refines the structure of the workpiece transfer platform 3 based on the precision grinding machine for mold steel production described in Embodiment 1.

[0082] Each workpiece transfer station 3 is a key transfer unit used to carry and transport mold steel workpieces to be processed or already processed. Its main structure includes a rigid, longitudinally extending main support frame 31, which provides basic support and contour positioning for the entire transfer station. Parallel internal support frame plates 32 are fixedly installed along the inner edge of the frame of the main support frame 31. These internal support frame plates 32 are distributed along the length of the station, serving to strengthen the structure and provide mounting base points.

[0083] Multiple workpiece transfer rollers 33 are installed longitudinally between parallel internal support frame plates 32. The journals at both ends of each workpiece transfer roller 33 are internally mounted within the corresponding sidewalls of the main support frame 31 of the machine. The key drive structure involves a transmission gear at the same end of all workpiece transfer rollers 33. These gears are interconnected by one or more encircling gear belts and powered by a single drive motor. This synchronous drive via gear belts ensures that all workpiece transfer rollers 33 rotate at completely identical speeds, guaranteeing smooth and uniform movement of the workpiece on the workpiece transfer machine 3 and preventing workpiece deviation or jamming due to differences in roller speeds.

[0084] To further improve the positioning accuracy of the workpiece during transmission, especially to prevent lateral displacement or shaking, two sets of robust lateral protective supports 34 are fixedly installed below the inner edge of the main support frame 31 of the machine tool, located on both sides of the machine tool's width direction. These two lateral protective supports 34 are arranged parallel to the length direction of the machine tool and support the core positioning adjustment mechanism along its length.

[0085] The adjustment mechanism, consisting of the bottom limiting base 35 and the adjusting screw 37, has several lateral limiting guide wheels 36 arranged on the top platform of the bottom limiting base 35 along the length of the machine. These lateral limiting guide wheels 36 are typically freely rotatable rollers or bearing structures, and the lateral limiting guide wheels 36 on the same side are arranged in a row along the length of the machine. More importantly, the installation position of the lateral limiting guide wheels 36 is precisely calculated so that they can pass upward through the gap between the roller bodies of adjacent workpiece transfer rollers 33, and that the apex of their top working surface is slightly higher than the working surface of the workpiece transfer roller 33.

[0086] Rows of lateral limiting guide wheels 36 form a continuous, rolling guide barrier along the transport direction. This principle ensures that the entire side of the workpiece receives a uniform, low-friction constraint force throughout the transport process. Compared to point-contact or intermittent-contact limiting blocks, this linear continuous guide wheel constraint greatly improves positioning stability, reduces guiding resistance and potential scratch risks, and ensures the accuracy of the workpiece's linear motion.

[0087] Example 3, please refer to Figure 2 , Figure 3 and Figure 5 Based on the precision grinding machine for mold steel production described in Example 1, this embodiment has made targeted optimizations to the specific structure and working principle of the cold air circulation device 4:

[0088] A top-mounted suspension bracket 16 is fixedly installed at the top of the inner cavity of the precision grinding chamber 15 described in Embodiment 1. This bracket is typically a rigid beam frame structure with crisscrossing beams, providing stable and reliable suspension support points for the cold air circulation device. The core cold air circulation device 4 in this embodiment has a hollow cold air storage box 42 as its main body. This box is designed to receive and temporarily store low-temperature cold air (such as low-temperature dry air or nitrogen) supplied from an external refrigeration system (not shown in the figure). The cold air storage box 42 is suspended by a number (usually four or more symmetrically distributed) of suspension connecting rods 44 provided at its four edges or specific connection points.

[0089] The cold air storage box 42 has a flat trapezoidal structure. Along the main direction of gas flow inside, from the end where the cold air delivery nozzle 41 is located (the air inlet) to the side where the airflow diffuser 43 is located (the bottom, i.e., the air outlet), the thickness of its internal space (the internal dimension of the box perpendicular to the bottom) gradually decreases, while the width of its internal space (the internal dimension of the box parallel to the bottom and perpendicular to the main airflow direction) gradually increases. This carefully designed gradual change in internal space plays a key role in regulating airflow. An airflow diffuser 43 is located at the bottom of the cold air storage box 42. This airflow diffuser 43 is not a flat plate, but rather composed of multiple slender, inclined strip-shaped structures (or guide vanes) arranged in parallel. Each guide vane has a specific inclination angle (e.g., 30°-60°), designed to guide the airflow from inside the box to the desired coverage area.

[0090] After the cold air enters the chamber, it first experiences initial buffering and deceleration in the thicker front section, mitigating the jet impact. Subsequently, the airflow moves along the main direction of the chamber's internal space (from the inlet to the outlet). During this flow, as the thickness of the internal space gradually decreases, the airflow channel is gradually compressed in the vertical direction, passively accelerating the airflow velocity in that direction (a reverse application of the Venturi effect). Simultaneously, as the width of the internal space gradually increases, the airflow has space to naturally diffuse in the width direction. This combined effect of compression and diffusion effectively transforms the concentrated high-speed jet from the cold air delivery nozzle 41 into a relatively low-speed fluid with a more uniform flow rate and a wider coverage area (matching the grinding bandwidth).

[0091] This embodiment transforms traditional centralized cooling into efficient, uniform, and directional wide-area cooling, perfectly realizing precise temperature management of high-temperature areas during the precision grinding process, effectively suppressing thermal damage, and providing strong hardware support for the staggered cooling mechanism proposed in Embodiment 1, ultimately ensuring high-quality output of mold steel precision grinding.

[0092] Example 4, please refer to Figures 2-9 Based on the precision grinding machine for mold steel production described in Example 1, this embodiment provides a detailed structural description of the workpiece support carrier assembly 5 and its linkage support and adjustment mechanism with the precision grinding unit 6.

[0093] The workpiece support carrier assembly 5 is the core load-bearing and transport unit of the grinding machine, precisely mounted on the bottom of the precision grinding chamber 15. Its main structure includes rigid carrier main bases 51 respectively located on both sides (longitudinal direction) of the precision grinding chamber base 13. Multiple structural reinforcing blocks 52 are fixedly installed on each carrier main base 51 to enhance overall rigidity. Between the two carrier main bases 51, an inner edge internal support frame 53 is mounted along the longitudinal direction. To provide higher load-bearing stability and a better mounting base, internal sliding guide rails 54 are precisely installed on the inner edge of the inner edge internal support frame 53 (near the center area of ​​the carrier).

[0094] The key workpiece carrying and conveying unit is installed between the internal support bases 53 on both sides: several support conveyor rollers 55 are arranged at intervals along the length of the carrier. These support conveyor rollers 55 are uniquely designed to be installed in pairs. In each pair, a workpiece clamping positioning plate 57 is mounted at both ends of the support conveyor roller 55 via a synchronous drive wheel 56 (such as a gear or sprocket). Importantly, the workpiece clamping positioning plate 57 is not directly fixed to the roller; its bottom is slidably mounted on the aforementioned internal sliding guide rail 54 via a suitable structure (such as a slider). This design allows the operator or drive mechanism (such as a lead screw nut or hydraulic cylinder, not shown) to flexibly adjust the spacing of each pair of support conveyor rollers 55 by moving the position of the workpiece clamping positioning plate 57 on the guide rail, thereby adapting to the support and conveying needs of workpieces of different lengths. The synchronous drive wheel 56 ensures that the rotation of the two rollers in the same pair is completely synchronized, preventing workpiece tilting.

[0095] The key support relationships of the precision grinding unit 6 and its linkage structure have been further clarified:

[0096] A lateral auxiliary support frame 17 is fixedly installed on the inner wall of the precision grinding chamber 15. The internal fixed frame 61 of the precision grinding unit 6 has high structural strength, with one end fixedly installed on the lateral auxiliary support frame 17 for stable lateral support. The other end of the internal fixed frame 61 is supported on the lower support frame 67 below. The bottom of the lower support frame 67 is fixed to the internal support base 53 on the corresponding side of the workpiece support carrier assembly 5. This arrangement forms a complete and stable sandwich-type support and transmission system of "chamber wall support - unit frame - lower support frame - carrier base", effectively distributing the grinding force to the carrier foundation and the base of the large base.

[0097] The lower drive belt roller 63 is a key drive roller that drives the precision grinding belt 7. Its structure includes a central support shaft section 631, on which the lower roller body 634, which contacts the grinding belt, is mounted and fixed. One end of the support shaft section 631 has a rotating shaft section 633, which is mounted on the lower support frame 67 via a precision bearing for rotational support. The other end of the support shaft section 631 has a shaft end support part 632. A support fixing seat 58 is provided on the main base 51 of the carrier, and a high-precision, high-rigidity fixed support bearing 59 is mounted on the support fixing seat 58. The shaft end support part 632 is directly fixedly mounted on the corresponding fixed support bearing 59. Thus, one end of the lower drive belt roller 63 is rotatable on the lower support frame 67 (drive end), while the other end is rigidly fixed on the main base 51 of the carrier via the fixed support bearing 59 (fixed end), forming an extremely stable double-support structure that minimizes radial runout of the drive roller.

[0098] At the bottom of the lower support frame 67 (near the rotating shaft segment 633), a bottom support rod 625 is vertically downwardly mounted. A steering coupling sleeve 626 is mounted on the top of the bottom support rod 625 via a freely movable pivot joint (such as a universal joint or ball joint). The end of the rotating shaft segment 633 (i.e., the drive input end) is fixed within the steering coupling sleeve 626. The steering coupling sleeve 626 is the junction point for power transmission and steering adjustment.

[0099] The linkage drive assembly 62 is the core actuator that drives the lower transmission belt roller 63 to rotate (speed and direction). When the transmission shaft 621 rotates, it drives the transmission drive linkage 623 through the connecting rotating bolt 622, which in turn drives the swing drive arm 624 to swing. The swing drive arm 624 acts on the steering connecting sleeve 626, and because the rotating shaft section 633 is fixed inside it, it forces the rotating shaft section 633 (i.e., the lower transmission belt roller 63) to rotate around its own axis. By controlling the rotation angle and speed of the transmission shaft 621, the grinding rate (linear speed) and direction (forward / reverse rotation) of the grinding belt 7 can be precisely adjusted.

[0100] The support and angle adjustment of the upper drive belt roller 66 are designed as follows in this embodiment:

[0101] The upper drive belt roller 66 is a key driven roller for adjusting the angle and tension of the grinding belt. Its structure includes a main roller mounting bracket 663 supporting the main roller body, and an upper roller body 661 rotatably supported and mounted on the roller mounting bracket 663 via a roller body support shaft 662. A frame connecting fixing seat 611 is located in the middle of the fixed frame 61 inside the unit. A lifting drive cylinder 612 (or other linear actuator, such as a hydraulic cylinder) is mounted on the frame connecting fixing seat 611. A lifting drive push rod 613 is provided at the piston rod end of the lifting drive cylinder 612. The bottom (non-roller shaft end) of the roller mounting bracket 663 is supported on the supporting end of the lifting drive push rod 613 via a rigid flipping support bracket 614 (shaped like an L-shaped bracket or arm). In this way, the extension and retraction action of the lifting drive cylinder 612 can directly raise or lower one end of the roller mounting bracket 663 through the lifting drive push rod 613 and the flip support bracket 614, thereby changing the spatial inclination angle of the entire upper transmission belt roller 66 (i.e. the fine grinding orientation of the working section of the grinding belt).

[0102] In order to stabilize the other end of the support roller mounting bracket 663 and achieve smooth angle changes, an upper support frame 65 is also provided on the fixed frame 61 inside the unit.

[0103] The upper support frame 65 includes a frame support base 651 fixed to the unit frame, and a precision steering adjustment device 652 mounted on the frame support base 651. An adjustment rotation shaft 653 is installed at the output end (drive end) of the steering adjustment device 652. At the other end of the frame support base 651, a steering support base 655 is installed. Mounted on the steering support base 655 is a swing drive frame 654 (such as a double-arm crank or sector gear frame). The shaft end of the adjustment rotation shaft 653 is connected to the center or one end of the swing drive frame 654 via a coupling or keyway. A shaft end support rod 656 is provided at the top of the swing drive frame 654, and this shaft end support rod 656 is supported at the bottom of the roller mounting bracket 663.

[0104] When the grinding angle needs to be adjusted: First, the steering adjustment device 652 is driven, causing the adjustment rotating shaft 653 to rotate. The adjustment rotating shaft 653 drives the swing drive frame 654 to swing around its fulcrum on the steering support base 655. The swinging motion of the swing drive frame 654 is transmitted through the shaft end support rod 656, applying a lifting or lateral displacement (depending on the swing direction) to the other end of the bottom of the roller mounting bracket 663. This action, in conjunction with the lifting drive cylinder 612 driving the lifting of one end of the bottom of the roller mounting bracket 663 through the lifting drive push rod 613, together achieves a stable change in the tilt angle of the roller mounting bracket 663 in space, that is, precisely drives the upper drive belt roller 66, or more precisely, adjusts the relative position and angle of the grinding working section formed by the lower drive belt roller 63 and the upper drive belt roller 66, forming the required fine grinding orientation.

[0105] This embodiment achieves highly flexible workpiece support, maximized system rigidity, a leap in transmission stability, and precise adjustment of grinding parameters through the coordinated design of the adjustable internal structure of the workpiece support carrier assembly 5, the rigid linkage support between the precision grinding unit 6 and the base, the revolutionary double support structure of the core lower transmission belt roller 63, and the angle adjustment mechanism of the upper transmission belt roller 66. Together, these elements form the core hardware foundation for meeting the requirements of high-precision and high-efficiency precision grinding of mold steel.

[0106] Example 5, please refer to Figure 3 , Figure 9 , Figure 10 and Figure 11 Based on the structure described in Embodiment 4, this embodiment further clarifies the precision mounting structure and double-half-wheel design of the guide limiting wheel 64, and explains its mechanical linkage relationship with the swing drive frame 654:

[0107] A robust lateral support 657 is provided along the side edges (typically both sides in the longitudinal direction) of the swing drive frame 654. This support is an extension of the main structure of the swing drive frame 654.

[0108] From each lateral edge bracket 657, a side edge protection bracket 658 extends outward (away from the center of the swing drive frame 654). The side edge protection bracket 658 is a rigid support arm, the end of which is designed to install a guide limit wheel 64 and precisely position the wheel near the edge line of the precision grinding belt 7.

[0109] Each guide wheel 64 consists of the following key components:

[0110] Wheel mounting base 641: This is a base structure that is fixed to the pre-set mounting holes on the side guard bracket 658 by bolts or tight fitting.

[0111] Hub 642: A slender spindle whose root (inner end) is mounted on the wheel mounting base 641 by means of bearings or interference fit, ensuring that it can rotate freely around its own axis.

[0112] Left half guide wheel 643 and right half guide wheel 644: These are two key friction guiding components. They each have a rim (the working surface in contact with the grinding belt) and are fitted parallel to each other on the outer cylindrical surface of the hub 642. The two halves can rotate independently or float slightly on the hub 642. Importantly, the left half guide wheel 643 and right half guide wheel 644 are not tightly fitted together, but rather a guide limiting gap 645 with a precise width is maintained. The width of this gap is precisely calculated and manufactured, slightly larger than the thickness of the corresponding edge of the precision-ground belt 7 (e.g., belt edge thickness + a small margin). The working surfaces of the wheel bodies formed by the left half guide wheel 643 and right half guide wheel 644 can be stably embedded into the edge of the running trajectory of the precision-ground belt 7 through the guide limiting gap 645.

[0113] At the moment and throughout the entire process when the direction of fine grinding changes, causing a corresponding adjustment in the running path (angle, position) of the fine grinding processing zone 7:

[0114] The side edges (edges) of the precision grinding belt 7 are always embedded within the guide limiting gaps 645 of the corresponding guide limiting wheels 64. Since the guide limiting wheels 64 are mechanically rigidly connected to the swing drive frame 654 for driving angle adjustment, their movements are completely synchronized. Therefore, no matter which new position the precision grinding belt 7 moves to in space due to angle adjustment, the guide limiting wheels 64 responsible for constraining its edges will "follow" it and move synchronously to the new corresponding position. During high-speed operation of the precision grinding belt 7, its edges are always constrained within the guide limiting gaps 645. The left half guide wheel 643 and the right half guide wheel 644 can rotate freely under the action of the belt's lateral force, providing low-friction rolling constraints. This fully synchronized "accompanying constraint" ensures that throughout the entire precision grinding orientation change process and at any subsequent adjustment position, the edges of the precision grinding belt 7 are always subjected to precise lateral guiding forces applied by the guide limiting wheels 64 in the correct position, perfectly avoiding temporary belt slippage, deviation, or twisting caused by changes in angle or position. It maintained a high degree of stability and accuracy in the trajectory of the belt.

[0115] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0116] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A precision grinding machine for die steel production, comprising a main machining machine tool (1), two machine tool moving guide rail platforms (2) respectively arranged at both ends of the main machining machine tool (1), and two workpiece transmission machine tables (3) respectively arranged outside the two machine tool moving guide rail platforms (2); the main machining machine tool (1) comprises a main support base (11), machine tool support foot pads (12) arranged on both sides of the main support base (11), a precision grinding chamber base (13) arranged on the main support base (11), and a precision grinding machining chamber (15) arranged on the top of the precision grinding chamber base (13); the workpiece transmission machine table (3) is arranged on a transmission table support base (14) arranged on the machine tool support foot pad (12); characterized in that, a workpiece support carrier assembly (5), a plurality of precision grinding machining units (6), and a plurality of cold air circulation devices (4) are arranged in the precision grinding machining chamber (15); the workpiece support carrier assembly (5) is installed at the bottom of the precision grinding machining chamber (15) and is respectively connected to the corresponding machine tool moving guide rail platform (2) at both ends; the plurality of precision grinding machining units (6) are installed above the workpiece support carrier assembly (5); and the plurality of cold air circulation devices (4) are hung on the top of the chamber inner cavity of the precision grinding machining chamber (15). The precision grinding machining units (6) and the cold air circulation devices (4) are arranged in a staggered manner along the direction of the workpiece support carrier assembly (5), one cold air circulation device (4) is arranged behind each precision grinding machining unit (6), and the next precision grinding machining unit (6) is arranged behind each cold air circulation device (4).

2. The precision grinding machine for mold steel production according to claim 1, characterized by, The precision grinding machining unit (6) comprises: an internal fixed frame (61) of the unit; a lower support frame (67) arranged below the internal fixed frame (61) of the unit and a lower transmission belt roller (63) supported thereon; an upper support frame (65) arranged above the internal fixed frame (61) of the unit and an upper transmission belt roller (66) supported thereon; a precision grinding belt (7) wound around the lower transmission belt roller (63) and the upper transmission belt roller (66); a connecting rod transmission assembly (62) arranged on the side of the internal fixed frame (61) of the unit, which is used to drive the lower transmission belt roller (63) to rotate to adjust the precision grinding rate and direction of the precision grinding belt (7); a guide limiting wheel (64) arranged on both sides of the internal fixed frame (61) of the unit and driven by the upper support frame (65), which is used to limit the edges of the precision grinding belt (7); wherein the upper support frame (65) is used to adjust the position of the upper transmission belt roller (66) to change the precision grinding direction of the precision grinding belt (7).

3. The precision grinding machine for mold steel production according to claim 2, characterized by, The connecting rod transmission assembly (62) comprises: a transmission rotating shaft (621) arranged on the side of the internal fixed frame (61) of the unit; a connecting rotating bolt (622) arranged on the shaft end of the transmission rotating shaft (621); a transmission driving connecting rod (623) installed on the connecting rotating bolt (622); a swing driving arm (624) installed on the swing end of the transmission driving connecting rod (623); The bottom of the lower support frame (67) is provided with a bottom support rod (625), and a steering connecting sleeve (626) is installed at the top end of the bottom support rod (625) through a swing joint; the terminal end of the rotating shaft section (633) of the lower transmission belt roller (63) is fixed in the steering connecting sleeve (626); and the swing driving arm (624) is connected with the steering connecting sleeve (626).

4. The precision grinding machine for mold steel production according to claim 3, characterized by, The upper support frame (65) comprises: a frame support base (651); a steering adjusting device (652) arranged on the frame support base (651) and a adjusting rotating shaft (653) driven by the driving end of the steering adjusting device (652); a steering support base (655) arranged on the frame support base (651); a swing driving machine frame (654) erected on the steering support base (655), and the shaft end of the adjusting rotating shaft (653) is connected with the swing driving machine frame (654); a shaft frame end support rod (656) arranged on the top of the swing driving machine frame (654) and used for supporting the roller body mounting bracket (663) of the upper transmission belt roller (66).

5. The precision grinding machine for mold steel production according to claim 4, characterized by, The guide limiting wheel (64) comprises a wheel body mounting seat (641), a hub (642) arranged on the wheel body mounting seat (641), and left and right half guide wheels (643) and (644) coaxially sleeved on the hub (642); the left and right half guide wheels (643) and (644) form a guide limiting gap (645) for the edge line of the fine grinding processing belt (7) to be embedded; and the wheel body mounting seat (641) is fixed on the side edge protection bracket (658) connected to the side edge of the swing driving machine frame (654).

6. The precision grinding machine for mold steel production according to any one of claims 1 to 5, characterized by, The main body of the cold air circulating device (4) is a cold air storage box body (42); the top of the cold air storage box body (42) is provided with a cold air conveying nozzle (41), and the bottom is provided with an air flow diffusion guide plate (43); the cold air storage box body (42) is in the form of a flat trapezoid as a whole, and the space inside gradually narrows in thickness and gradually increases in width from one end of the cold air conveying nozzle (41) to the other end of the air flow diffusion guide plate (43); the air flow diffusion guide plate (43) is in the form of an inclined strip. The cold air storage box body (42) is hoisted on the top hoisting bracket (16) arranged on the top of the inner cavity of the fine grinding processing compartment (15) through the hoisting connecting rods (44) arranged around the cold air storage box body (42).

7. The precision grinding machine for mold steel production according to any one of claims 1 to 5, characterized by, The workpiece conveying machine table (3) comprises: a machine table main support frame (31); an internal support frame plate (32) arranged on the inner side of the machine table main support frame (31); a plurality of workpiece conveying rollers (33) installed in parallel between the internal support frame plates (32), the roller ends of which penetrate the machine table main support frame (31) and are synchronously driven through a gear belt; two side protection brackets (34) arranged below the frame body of the machine table main support frame (31) along the sides; an adjusting screw (37) arranged between the two side protection brackets (34) and a bottom limiting base frame (35) movably mounted on the adjusting screw (37); and A plurality of lateral limiting guide wheels (36) are arranged on the top of the bottom limiting base frame (35), and the lateral limiting guide wheels (36) on the same side are arranged in a row, and the lateral limiting guide wheels (36) pass through the gap between the roller bodies of the workpiece conveying roller (33) and are used to fit the two sides of the die steel workpiece.

8. The precision grinding machine for mold steel production according to claim 5, characterized by, The workpiece supporting carrier assembly (5) comprises: A carrier main base (51) is arranged on the two sides of the fine grinding cabin base (13); A structure reinforcing support (52) and an internal support base frame (53) are installed on the carrier main base (51); A plurality of supporting conveying rollers (55) are installed between the two internal support base frames (53); each two of the supporting conveying rollers (55) form a group, and each group of supporting conveying rollers (55) is provided with a workpiece clamping positioning disc (57) through a synchronous transmission wheel (56); An internal sliding guide rail (54) is arranged on the inner side of the internal support base frame (53); and the workpiece clamping positioning disc (57) is slidingly installed on the internal sliding guide rail (54) to adjust the spacing of each group of supporting conveying rollers (55).

9. The precision grinder for producing a die steel according to claim 8, wherein A lateral auxiliary support frame (17) is installed on the inner cabin wall of the fine grinding processing cabin (15); one end of the machine set internal fixed frame (61) is fixedly installed on the lateral auxiliary support frame (17), and the other end is supported by the lower support frame (67); and the lower support frame (67) is fixed to the corresponding internal support base frame (53) on the bottom. The support shaft section (631) of the lower transmission belt roller (63) is provided with a rotating shaft section (633) at one end, the rotating shaft section (633) is installed on the lower support frame (67) through a bearing, and the other end of the support shaft section (631) is provided with a shaft end support part (632); the carrier main base (51) is provided with a support fixing seat (58) and a plurality of fixed support bearings (59) arranged thereon, and the shaft end support part (632) is fixedly installed on the corresponding fixed support bearing (59).

10. The precision grinding machine for mold steel production according to any one of claims 2 to 5, characterized by, The machine set internal fixed frame (61) is provided with a frame connecting fixing seat (611) at the middle position; the frame connecting fixing seat (611) is provided with a jacking drive cylinder (612) and a jacking drive push rod (613) driven by the jacking drive cylinder (612); and the roller body mounting bracket (663) of the upper transmission belt roller (66) is arranged on the support end of the jacking drive push rod (613) through a turnover supporting bracket (614) at the bottom.

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