A screw thread grinding device for producing a screw valve

Abstract

This invention relates to the field of thread grinding technology, specifically to a thread grinding apparatus for screw valve production. The apparatus includes a fixing unit with a feed mechanism mounted on a support for fixing the screw valve screw, and a rotation mechanism mounted on the support. The grinding unit includes a grinding mechanism mounted on the support for thread grinding of the screw surface, a drive mechanism mounted on the support for driving the grinding mechanism in linear reciprocating motion, and an adjustment mechanism mounted on the support for adjusting the stroke of the linear reciprocating motion of the grinding mechanism. By coordinating the drive mechanism and the adjustment mechanism with the grinding mechanism, the distance between the grinding wheel and the screw surface can be kept consistent, further improving the product yield. Furthermore, the adjustment mechanism allows for thread grinding of screw valve screws with different thread groove depths and sizes, effectively enhancing the applicability and flexibility of the equipment in various production scenarios.

Description

Technical Field

[0001] This invention relates to the field of thread grinding technology, and more specifically to a thread grinding apparatus for screw valve production. Background Technology

[0002] In industrial fields such as fluid control and precision injection molding, screw valves are core components for achieving precise media delivery and pressure regulation. The core working component is the screw, which controls the opening and closing of the fluid channel and regulates flow through a combination of rotation and axial movement. During long-term use, the screw valve screw frequently comes into contact with the valve body and the fluid medium, facing dual wear and tear. Therefore, the industry commonly uses thread grinding technology to precisely machine the screw surface. Thread grinding precisely shapes the screw thread profile, improving the screw's hardness and wear resistance. The screw valve's surface is smooth and corrosion-resistant, thus extending its service life and reducing equipment maintenance costs. However, the threaded grooves on the screw surface create an uneven surface. If a fixed grinding wheel is used, the distance between the grinding wheel and the threaded groove will suddenly increase when the wheel moves to the threaded groove position, which may lead to a decrease in grinding accuracy and insufficient machining precision. If the distance is too small when the wheel moves to the thread crest position, it may cause surface burns, cracks, or deformation. It is difficult to make timely adjustments to the distance, which can easily lead to uneven grinding precision and affect the product qualification rate.

[0003] In view of this, we propose a thread grinding processing device for screw valve production. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a thread grinding device for screw valve production. This device effectively solves the problem of uneven surface texture caused by thread grooves on the screw surface, which makes it difficult to compensate and adjust the distance between the grinding wheel and the screw surface during fixed grinding wheel processing. This can easily lead to insufficient processing accuracy, surface burns, and ultimately uneven grinding accuracy, affecting product qualification rate.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a thread grinding apparatus for screw valve manufacturing, comprising a support frame, and including... The fixing unit includes a feed mechanism mounted on a bracket for fixing the screw of the screw valve, and a rotating mechanism mounted on the bracket. The rotating mechanism can be used to drive the screw in a linear motion state to rotate synchronously. The grinding unit includes a grinding mechanism mounted on a support for thread grinding of a screw surface, a drive mechanism mounted on the support for driving the grinding mechanism to perform linear reciprocating motion, and an adjustment mechanism mounted on the support for adjusting the stroke of the linear reciprocating motion of the grinding mechanism.

[0006] Furthermore, the feeding mechanism includes an electric cylinder fixedly connected to the top of the support, a base fixedly connected to the output end of the electric cylinder, a guide rail slidably connected to the inner wall of the base, and the bottom of the guide rail slidably connected to the top of the support.

[0007] Furthermore, a fixed shaft is rotatably connected to the inner wall of the base, and an electric clamp for clamping and fixing the screw of the screw valve is fixedly connected to the end of the fixed shaft away from the electric cylinder.

[0008] Furthermore, the rotating mechanism includes a guide rod that is inclinedly arranged on the bracket, both ends of which are fixedly connected to the inner wall of the bracket, and a slider is slidably connected to the surface of the guide rod.

[0009] Furthermore, a rack is fixedly connected to the side of the slider near the base, the surface of the rack is slidably connected to the inner wall of the base, and a gear is meshed with the top of the rack, the inner wall of the gear is fixedly connected to the surface of the fixed shaft.

[0010] Furthermore, the grinding mechanism includes a thread grinding spindle mounted above the base, a fixed rod fixedly connected to one side of the thread grinding spindle, a guide rail two fixedly connected to the surface of the fixed rod, and the side of the guide rail two away from the thread grinding spindle fixedly connected to the inner wall of the bracket.

[0011] Furthermore, the drive mechanism includes a motor 1 fixedly connected to one side of the bracket, and a fixed shaft 2 fixedly connected to the motor 1 via an output shaft.

[0012] Furthermore, the end of the fixed shaft two away from the motor one rotates through the bracket, and the end of the fixed shaft two passing through the bracket is fixedly connected to a fixed frame.

[0013] Furthermore, the adjustment mechanism includes a second motor fixedly connected to the top of the fixed frame, a lead screw fixedly connected to the second motor via an output shaft, the bottom of the lead screw being rotatably connected to the inner wall of the fixed frame, a threaded sleeve being threadedly connected to the surface of the lead screw, and the surface of the threaded sleeve being slidably connected to the inner wall of the fixed frame.

[0014] Furthermore, a limiting disc is fixedly connected to one side of the threaded sleeve. An annular groove is provided on the side of the limiting disc away from the threaded sleeve. A guide wheel is slidably connected to the inner wall of the annular groove. The guide wheel is rotatably connected to one end of the fixed rod on the side away from the limiting disc.

[0015] The technical solution provided by this invention has the following advantages compared with known public technologies: This invention utilizes a drive mechanism and an adjustment mechanism to coordinate the movement of the grinding mechanism. The drive mechanism drives the grinding mechanism to perform linear reciprocating motion along the screw surface, while the adjustment mechanism adjusts the reciprocating stroke according to the screw thread groove depth. This reduces manual intervention and ensures that the grinding wheel and screw surface maintain a consistent distance, effectively avoiding uneven grinding accuracy caused by changes in distance. It effectively solves defects such as insufficient processing accuracy and surface burns, significantly improving the deviation range of grinding processing accuracy and further enhancing the product qualification rate. Furthermore, the adjustment mechanism allows for thread grinding of screw valve screws with different thread groove depths and specifications, effectively improving the applicability and flexibility of the equipment in different production scenarios. Through the coordinated action of the feeding mechanism and the rotating mechanism, the feeding mechanism drives the screw to make linear feed motion, and the rotating mechanism can drive the screw to rotate synchronously while it moves linearly. There is no need to stop the machine midway to adjust the screw direction. It can cover the entire circumference of the screw in one go, and at the same time eliminates the need for manual flipping and calibration steps, which can effectively shorten the processing time of a single screw and significantly improve production efficiency. Attached Figure Description

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

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the fixed unit structure of the present invention; Figure 3 This is a cross-sectional view of the base of the present invention; Figure 4 This is a cross-sectional view of the bracket of the present invention; Figure 5 This is a cross-sectional view of the fixing frame of the present invention; Figure 6 This is a cross-sectional view of the limiting disc of the present invention.

[0018] The numbers in the diagram represent: 100, bracket; 200. Fixed unit; 201. Feeding mechanism; 2011. Electric cylinder; 2012. Base; 2013. Guide rail one; 2014. Electric clamp; 2015. Fixed shaft one; 202. Rotating mechanism; 2021. Guide rod; 2022. Slider; 2023. Rack; 2024. Gear; 300. Grinding unit; 301. Grinding mechanism; 3011. Thread grinding spindle; 3012. Fixed rod; 3013. Guide rail two; 302. Drive mechanism; 3021. Motor one; 3022. Fixed frame; 3023. Fixed shaft two; 303. Adjustment mechanism; 3031. Motor two; 3032. Lead screw; 3033. Threaded sleeve; 3034. Limiting plate; 3035. Annular groove; 3036. Guide wheel. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] The present invention will be further described below with reference to embodiments.

[0021] like Figures 1 to 6 As shown, a thread grinding device for screw valve production includes a support 100 and a fixing unit 200. The support 100 includes a feed mechanism 201 for fixing the screw of the screw valve and a rotating mechanism 202 mounted on the support 100. The rotating mechanism 202 can be used to drive the screw to rotate synchronously in a linear motion state. The support 100 serves as the carrier of the overall equipment, supporting and fixing the overall structure of the equipment. The feed mechanism 201 can fix the screw of the screw valve and drive the screw to move linearly. The rotating mechanism 202 can drive the screw to rotate synchronously while the feed mechanism 201 drives the screw to move linearly, thereby facilitating thread grinding on the entire surface of the screw. Specifically, the feeding mechanism 201 includes an electric cylinder 2011 fixedly connected to the top of the support 100. The output end of the electric cylinder 2011 is fixedly connected to a base 2012. A guide rail 2013 is slidably connected to the inner wall of the base 2012. The bottom of the guide rail 2013 is fixedly connected to the top of the support 100. A fixed shaft 2015 is rotatably connected to the inner wall of the base 2012. An electric clamp 2014 for clamping and fixing the screw of the screw valve is fixedly connected to the end of the fixed shaft 2015 away from the electric cylinder 2011. The electric clamp 2014 can be an electric multi-jaw self-centering chuck adapted to the screw valve screw clamping requirements. The screw valve screw is clamped and fixed by its own electric driving clamping structure. It should be noted that the electric clamp 2014 can clamp and fix one end of the screw valve screw. Then, the electric cylinder 2011 is activated, which can drive the base 2012 to slide on the guide rail 2013, thereby driving the electric clamp 2014 fixed on the fixed shaft 2015 to move linearly, and at the same time driving the screw valve screw on the electric clamp 2014 to move. Specifically, the rotating mechanism 202 includes an inclined guide rod 2021 on the support 100. Both ends of the guide rod 2021 are fixedly connected to the inner wall of the support 100. A slider 2022 is slidably connected to the surface of the guide rod 2021. A rack 2023 is fixedly connected to the side of the slider 2022 near the base 2012. The surface of the rack 2023 is slidably connected to the inner wall of the base 2012. A gear 2024 is meshed with the top of the rack 2023. The inner wall of the gear 2024 is fixedly connected to the surface of the fixed shaft 2015. Through the inclined guide rod 2021 and the limiting and guiding of the rack 2023 by the base 2012, the rack 2023 can be driven to move while the screw moves linearly. It should be noted that when the screw moves linearly following the base 2012 and the electric clamp 2014, the inclined guide rod 2021 and the base 2012 guide the rack 2023, which can drive the rack 2023 fixedly connected to the slider 2022 to move to one side while following the linear movement of the base 2012. This drives the gear 2024 to rotate, and at the same time drives the fixed shaft 2015 fixedly connected to the gear 2024 to rotate. This allows the screw to rotate while moving linearly, ensuring that the entire surface of the screw valve screw can be threaded without repeatedly adjusting the direction and position of the screw. Furthermore, the grinding unit 300 includes a grinding mechanism 301 mounted on the support 100 for thread grinding of the screw surface, a drive mechanism 302 mounted on the support 100 for driving the grinding mechanism 301 to perform linear reciprocating motion, and an adjustment mechanism 303 mounted on the support 100 for adjusting the stroke of the linear reciprocating motion of the grinding mechanism 301. The drive mechanism 302 and the adjustment mechanism 303 can drive the grinding mechanism 301 to move up and down reciprocally. When grinding the screw surface, since the screw surface has threaded grooves, the up and down reciprocating motion of the grinding mechanism 301 can ensure that the distance between the grinding equipment and the screw surface is always consistent, thus ensuring the quality of the screw surface grinding. At the same time, the adjustment mechanism 303 can also adjust the stroke of the up and down reciprocating motion of the grinding mechanism 301 according to the depth of the screw threaded grooves, so as to be applicable to the thread grinding of screw valve screws of different specifications and sizes. Specifically, the grinding mechanism 301 includes a thread grinding spindle 3011 mounted above the base 2012. A fixing rod 3012 is fixedly connected to one side of the thread grinding spindle 3011, and a guide rail 3013 is fixedly connected to the surface of the fixing rod 3012. The side of the guide rail 3013 away from the thread grinding spindle 3011 is fixedly connected to the inner wall of the support 100. The thread grinding spindle 3011 can be a high-precision grinding machine, and the thread grinding spindle 3011 is driven by a grinding spindle motor. The moving grinding wheel rotates at high speed to perform thread grinding on the screw surface. At the same time, the coolant supply device delivers coolant. Driven by the drive mechanism 302 and the adjustment mechanism 303, the fixed rod 3012 moves linearly back and forth along the guide rail 3013. The adjustment mechanism 303 can adjust the reciprocating stroke of the thread grinding spindle 3011 to complete the grinding on the screw surface of the screw valve that moves linearly and rotates synchronously with the fixed unit 200, thereby improving the machining accuracy and surface quality of the screw thread. Specifically, the drive mechanism 302 includes a motor 3021 fixedly connected to one side of the bracket 100. A fixed shaft 3023 is fixedly connected to the motor 3021 via an output shaft. The end of the fixed shaft 3023 away from the motor 3021 rotates through the bracket 100. A fixed frame 3022 is fixedly connected to the end of the fixed shaft 3023 passing through the bracket 100. The adjustment mechanism 303 includes a motor 3031 fixedly connected to the top of the fixed frame 3022. A lead screw 3032 is fixedly connected to the motor 3031 via an output shaft. The bottom of the screw 3032 is rotatably connected to the inner wall of the fixed frame 3022. The surface of the screw 3032 is threadedly connected to the threaded sleeve 3033. The surface of the threaded sleeve 3033 is slidably connected to the inner wall of the fixed frame 3022. One side of the threaded sleeve 3033 is fixedly connected to the limiting plate 3034. The side of the limiting plate 3034 away from the threaded sleeve 3033 is provided with an annular groove 3035. The inner wall of the annular groove 3035 is slidably connected to the guide wheel 3036. The side of the guide wheel 3036 away from the limiting plate 3034 is rotatably connected to one end of the fixed rod 3012. It should be noted that while the screw valve screw is driven to move by the electric cylinder 2011, the motor 3021 is started simultaneously. The fixed frame 3022 is rotated by the fixed shaft 3023, and the limiting plate 3034 connected to the threaded sleeve 3033 is rotated at the same time. The annular groove 3035 opened in the limiting plate 3034 and the guide wheel 3036 sliding in the annular groove 3035, together with the fixed rod 3012, form an eccentric structure. Thus, while the fixed frame 3022 is rotated by the motor 3021, the thread grinding spindle 3011 can be driven to move up and down reciprocally by the fixed rod 3012. This ensures that the grinding wheel of the thread grinding spindle 3011 and the surface of the screw valve screw during the movement and rotation always maintain the same distance. Furthermore, when machining screws for different screw valves, since the depth of the thread grooves on the screw surface varies, to ensure the thread grinding process on the screw surface, the motor 3031 can be started to drive the lead screw 3032 in the fixed frame 3022 to rotate. This, in turn, drives the limit plate 3034 to move axially through the threaded sleeve 3033, thereby adjusting the eccentric distance and thus adjusting the size of the reciprocating stroke of the thread grinding spindle 3011. This allows it to be applied to the thread grinding process of screw valve screws of different specifications and sizes.

[0022] The working principle of this invention is as follows: The electric clamp 2014 is fixedly connected to the end of the fixed shaft 2015 away from the electric cylinder 2011. An electric multi-jaw self-centering chuck adapted to the screw valve screw clamping requirements is selected. In use, one end of the screw valve screw is first aligned with the clamping center of the electric clamp 2014. The electric drive system of the electric clamp 2014 is started to drive multiple jaws to move radially synchronously until the jaws are tightly attached to the screw surface, thereby achieving centering and clamping of the screw and ensuring that the screw axis coincides with the axis of the fixed shaft 2015 to avoid radial offset in subsequent movements. Since the electric clamp 2014 is existing technology, it will not be described in detail here. The electric cylinder 2011 is fixedly connected to the top of the bracket 100, and its output end is rigidly connected to the base 2012. The inner wall of the base 2012 is slidably engaged with the guide rail 2013, and the bottom of the guide rail 2013 is fixed to the top of the bracket 100. When it is necessary to drive the screw to move linearly, the electric cylinder 2011 is activated, and the piston rod of the electric cylinder 2011 extends or retracts, driving the base 2012 to slide along the extension direction of the guide rail 2013. Since the fixed shaft 2015 is rotatably connected to the inner wall of the base 2012, and the electric clamp 2014 is fixed to the end of the fixed shaft 2015, the sliding of the base 2012 will synchronously drive the fixed shaft 2015, the electric clamp 2014 and the clamped screw to move in a straight line, realizing the axial feed of the screw. The feed speed can be adjusted by the control parameters of the electric cylinder 2011 to adapt to different grinding process requirements. The guide rod 2021 is fixed to the inner wall of the bracket 100 in an inclined state, and its surface is slidably connected to the slider 2022. The inclination angle can be designed according to the ratio of the required rotational speed of the screw to the linear feed speed. When the base 2012 moves linearly along the guide rail 2013 under the drive of the electric cylinder 2011, the inner wall of the base 2012 generates an axial thrust on the rack 2023. The end of the rack 2023 away from the gear 2024 is fixedly connected to the slider 2022. Therefore, the rack 2023 will drive the slider 2022 to slide along the inclination direction of the guide rod 2021. The inclined structure of the guide rod 2021 decomposes the axial movement of the rack 2023 into a following movement along the axial direction of the base 2012 and a transverse movement perpendicular to the axial direction. The surface of rack 2023 slides against the inner wall of base 2012, and its top meshes with gear 2024. The inner wall of gear 2024 is fixed to the surface of fixed shaft 2015. When slider 2022 drives rack 2023 to slide along guide rod 2021, rack 2023 will have a lateral displacement, which will drive gear 2024 to rotate around the axis of fixed shaft 2015. Since gear 2024 is fixed to fixed shaft 2015, the rotation of gear 2024 will synchronously drive fixed shaft 2015 to rotate, and fixed shaft 2015 will drive screw to rotate through electric clamp 2014. In actual machining operations, by adjusting the tilt angle of the guide rod 2021, the lateral displacement of the rack 2023 can be changed, thereby adjusting the rotational speed of the gear 2024, ultimately achieving a precise match between the screw rotational speed and the linear feed speed, ensuring that every area of ​​the screw surface can be ground evenly. The thread grinding spindle 3011 is a high-precision thread grinding machine, installed above the base 2012. One side of it is connected to the guide rail 3013 via a fixing rod 3012. During operation, the grinding spindle motor of the thread grinding spindle 3011 drives the grinding wheel to rotate at high speed. The grinding wheel contacts the surface area to be ground on the screw, performing precision grinding. At the same time, the coolant supply device of the thread grinding spindle 3011 delivers coolant to the contact area between the grinding wheel and the workpiece through coolant pipelines, cooling and lubricating the grinding area and washing away the grinding chips. As the screw moves linearly and rotates, the grinding area cools and solidifies with the movement of the grinding contact area, forming a reinforced surface on the screw surface that is precisely formed with the base material, which can significantly improve the hardness, wear resistance and corrosion resistance of the screw. One end of the fixed rod 3012 is fixedly connected to the thread grinding spindle 3011, and the other end is rotatably connected to the guide wheel 3036. The surface of the fixed rod 3012 is fixedly connected to the guide rail 3013. The side of the guide rail 3013 away from the thread grinding spindle 3011 is fixed to the inner wall of the bracket 100. The extension direction of the guide rail 3013 is a vertical direction perpendicular to the screw axis. Its function is to provide guidance for the up-and-down reciprocating motion of the thread grinding spindle 3011, ensuring that the thread grinding spindle 3011 moves only in the vertical direction under the drive of the drive mechanism 302 and the adjustment mechanism 303, avoiding horizontal deviation, and ensuring the relative position stability of the grinding wheel and the screw surface. The fixed rod 3012 serves as the connection carrier between the thread grinding spindle 3011 and the guide wheel 3036, transmitting the power of the adjustment mechanism 303 to the thread grinding spindle 3011 to achieve synchronous transmission of motion. Motor 3021 is fixedly connected to one side of bracket 100. A servo motor is selected to ensure stable and precise speed control. When working, motor 3021 is started. The output shaft of motor 3021 is rigidly connected to fixed shaft 3023 through a coupling, transmitting rotational power to fixed shaft 3023. The rotation direction of motor 3021 can be switched by the control system. The rotation speed can be adjusted according to the pitch of the screw thread groove and the screw rotation speed to ensure that the reciprocating frequency of the thread grinding spindle 3011 matches the feed rhythm of the screw thread groove. The end of the fixed shaft 3023 away from the motor 3021 rotates through the bracket 100, and the end of the fixed shaft 3023 passing through the bracket 100 is fixedly connected to the fixed frame 3022. The fixed frame 3022 provides a mounting carrier for the adjustment mechanism 303. When the fixed shaft 3023 rotates under the drive of the motor 3021, it will synchronously drive the fixed frame 3022 to rotate around the axis of the fixed shaft 3023. Since the fixed frame 3022, the adjustment mechanism 303, and the fixed rod 3012 are linked through the guide wheel 3036, the rotation of the fixed frame 3022 will be converted into the vertical reciprocating motion of the thread grinding spindle 3011 along the guide rail 3013. When the fixed frame 3022 rotates, the limiting plate 3034 in the adjusting mechanism 303 will move in a circular motion with the fixed frame 3022, and the guide wheel 3036 will slide in the annular groove 3035 of the limiting plate 3034, which will generate a vertical thrust on the fixed rod 3012, thereby driving the thread grinding spindle 3011 to move up and down along the guide rail 3013 to achieve the gap compensation between the grinding wheel and the thread groove surface of the screw. Motor 2 3031 is fixedly connected to the top of the fixed frame 3022. A servo motor is selected to achieve precise speed and angle control. Its output shaft is fixedly connected to the lead screw 3032 through a coupling. The bottom of the lead screw 3032 is rotatably connected to the inner wall of the fixed frame 3022 through a bearing. When it is necessary to adjust the reciprocating stroke of the grinding mechanism 301, Motor 2 3031 is started. The output shaft of Motor 2 3031 drives the lead screw 3032 to rotate around its own axis. The rotation direction of the lead screw 3032 determines the movement direction of the threaded sleeve 3033. The threaded sleeve 3033 is threadedly engaged with the lead screw 3032, and its surface is slidably connected to the inner wall of the fixed frame 3022. The limiting plate 3034 is fixedly connected to one side of the threaded sleeve 3033, and an annular groove 3035 is opened on the side away from the threaded sleeve 3033. When the lead screw 3032 rotates, the threaded sleeve 3033 will move along the axial direction of the lead screw 3032, and synchronously drive the limiting plate 3034 to move up and down. Since the guide wheel 3036 is slidably connected in the annular groove 3035, and the guide wheel 3036 is rotatably connected to the fixed rod 3012, the up and down movement of the limiting plate 3034 will change the position of the annular groove 3035 relative to the guide wheel 3036, thereby changing the sliding stroke of the guide wheel 3036 in the annular groove 3035 when the fixed frame 3022 rotates. When the limiting plate 3034 rises, the highest point of the annular groove 3035 moves upward, the vertical displacement of the guide wheel 3036 increases, and the reciprocating stroke of the thread grinding spindle 3011 increases accordingly. Conversely, when the limiting plate 3034 falls, the highest point of the annular groove 3035 moves downward, the vertical displacement of the guide wheel 3036 decreases, and the reciprocating stroke of the thread grinding spindle 3011 decreases accordingly, thereby achieving adaptation to thread grooves of different depths. The guide wheel 3036 is rotatably connected to one end of the fixed rod 3012. Its outer wall slides in contact with the inner wall of the annular groove 3035 and remains in contact during the sliding process. When the fixed frame 3022 rotates under the drive of the motor 3021, the limit plate 3034 moves in a circular motion with the fixed frame 3022. The inner wall of the annular groove 3035 will generate a periodic thrust on the guide wheel 3036. Since the guide wheel 3036 can only rotate around its own axis and the fixed rod 3012 can only move vertically along the guide rail 3013, the thrust will be converted into the vertical reciprocating motion of the fixed rod 3012, which will drive the thread grinding spindle 3011 to move up and down along the guide rail 3013, ensuring that the distance between the grinding wheel and the screw surface is always consistent, and avoiding uneven grinding accuracy or workpiece surface burn due to changes in distance. After the entire surface of the screw to be ground is finished, turn off the grinding spindle motor and coolant supply device of the thread grinding spindle 3011, stop the operation of electric cylinder 2011, motor 1 3021 and motor 2 3031, start electric clamp 2014 to release the jaws, take out the processed screw, and complete one grinding cycle.

[0023] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thread grinding apparatus for screw valve production, comprising a support (100), characterized in that, include, The fixing unit (200) includes a feed mechanism (201) for fixing the screw of the screw valve on the bracket (100) and a rotating mechanism (202) on the bracket (100). The rotating mechanism (202) can be used to drive the screw in linear motion to rotate synchronously. The grinding unit (300) includes a grinding mechanism (301) mounted on a bracket (100) for thread grinding of the screw surface, a drive mechanism (302) mounted on the bracket (100) for driving the grinding mechanism (301) to perform linear reciprocating motion, and an adjustment mechanism (303) mounted on the bracket (100) for adjusting the stroke of the linear reciprocating motion of the grinding mechanism (301).

2. The thread grinding apparatus for screw valve production according to claim 1, characterized in that, The feeding mechanism (201) includes an electric cylinder (2011) fixedly connected to the top of the bracket (100), a base (2012) fixedly connected to the output end of the electric cylinder (2011), a guide rail (2013) slidably connected to the inner wall of the base (2012), and the bottom of the guide rail (2013) fixedly connected to the top of the bracket (100).

3. The thread grinding apparatus for screw valve production according to claim 2, characterized in that, The inner wall of the base (2012) is rotatably connected to a fixed shaft (2015), and an electric clamp (2014) for clamping and fixing the screw of the screw valve is fixedly connected to the end of the fixed shaft (2015) away from the electric cylinder (2011).

4. The thread grinding apparatus for screw valve production according to claim 3, characterized in that, The rotating mechanism (202) includes a guide rod (2021) that is inclined on the bracket (100). Both ends of the guide rod (2021) are fixedly connected to the inner wall of the bracket (100), and a slider (2022) is slidably connected to the surface of the guide rod (2021).

5. The thread grinding apparatus for screw valve production according to claim 4, characterized in that, A rack (2023) is fixedly connected to the side of the slider (2022) near the base (2012). The surface of the rack (2023) is slidably connected to the inner wall of the base (2012). A gear (2024) is meshed with the top of the rack (2023). The inner wall of the gear (2024) is fixedly connected to the surface of the fixed shaft (2015).

6. The thread grinding apparatus for screw valve production according to claim 5, characterized in that, The grinding mechanism (301) includes a thread grinding spindle (3011) disposed above a base (2012). A fixed rod (3012) is fixedly connected to one side of the thread grinding spindle (3011). A guide rail (3013) is fixedly connected to the surface of the fixed rod (3012). The side of the guide rail (3013) away from the thread grinding spindle (3011) is fixedly connected to the inner wall of the bracket (100).

7. The thread grinding apparatus for screw valve production according to claim 6, characterized in that, The drive mechanism (302) includes a motor (3021) fixedly connected to one side of the bracket (100), and a fixed shaft (3023) fixedly connected to the motor (3021) via the output shaft.

8. The thread grinding apparatus for screw valve production according to claim 7, characterized in that, The end of the fixed shaft 2 (3023) away from the motor 1 (3021) rotates through the bracket (100), and the end of the fixed shaft 2 (3023) passing through the bracket (100) is fixedly connected to the fixed frame (3022).

9. A thread grinding apparatus for screw valve production according to claim 8, characterized in that, The adjustment mechanism (303) includes a motor (3031) fixedly connected to the top of the fixed frame (3022), a lead screw (3032) fixedly connected to the motor (3031) via an output shaft, the bottom of the lead screw (3032) being rotatably connected to the inner wall of the fixed frame (3022), and a threaded sleeve (3033) being threadedly connected to the surface of the lead screw (3032), the surface of the threaded sleeve (3033) being slidably connected to the inner wall of the fixed frame (3022).

10. A thread grinding apparatus for screw valve production according to claim 9, characterized in that, A limiting plate (3034) is fixedly connected to one side of the threaded sleeve (3033). An annular groove (3035) is provided on the side of the limiting plate (3034) away from the threaded sleeve (3033). A guide wheel (3036) is slidably connected to the inner wall of the annular groove (3035). The guide wheel (3036) is rotatably connected to one end of the fixed rod (3012) on the side away from the limiting plate (3034).

Images