Synchronous grinding device and method for double-sided grinding of internal threads of lead screw nut

Abstract

The invention relates to a synchronous grinding device and method for double-sided grinding of an internal thread of a lead screw nut. The technical problems that coaxiality errors are caused by existing multiple clamping, and internal threads are machined by rotating the angle of a grinding head are solved. Comprising a middle drive main shaft with a main shaft rotating part, a clamping channel allowing a lead screw nut part to penetrate is arranged on the circumferential inner side of the main shaft rotating part, a clamping structure is arranged in the clamping channel, cutter installing sliding tables are movably arranged on the outer sides of the two ends of the middle drive main shaft respectively, and the cutter installing sliding tables are connected with sliding table driving mechanisms capable of driving the cutter installing sliding tables to move in the axial direction. An online measuring head assembly is arranged at one end of the tool mounting sliding table, a turning tool assembly is arranged at the other end of the tool mounting sliding table, and an outer circle inner hole grinding assembly and an internal thread grinding assembly are arranged between the online measuring head assembly and the turning tool assembly. The device has the advantages that a plurality of procedures such as turning, grinding and online detection are integrated, the two ends of a workpiece can be synchronously machined through the symmetrical layout of the two cutter mounting sliding tables, the workpiece clamping frequency is reduced, the machining period is greatly shortened, and the working efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of turning and grinding equipment, and particularly relates to a device and method for synchronously grinding the internal threads of a lead screw nut on both sides. Background Art

[0002] Lead screw nuts are key components in precision transmission. The machining accuracy of the nut's internal threads, inner bores at both ends, and outer diameter directly impacts transmission efficiency, load capacity, and lifespan. Traditional machining equipment mostly uses a single-end machining process, machining one end of the workpiece first and then the other. However, this machining method requires multiple clamping steps, which can easily lead to coaxiality errors and make it difficult to ensure consistent machining accuracy at both ends. Furthermore, some lead screw nut parts machine the internal threads by rotating the grinding head. This deflection causes the shaft to contact the workpiece's inner bore, making it impossible to grind both sides of the internal thread simultaneously. Summary of the Invention

[0003] The purpose of the present invention is to provide a synchronous grinding device for double-sided grinding of the internal thread of a screw nut in order to solve the above problems.

[0004] Another object of the present invention is to provide a method for synchronous double-sided grinding of the internal thread of a screw nut in order to solve the above-mentioned problem.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a synchronous double-sided grinding device for the internal thread of a screw nut, comprising a middle-drive spindle with a spindle rotating part, the circumferential inner side of the spindle rotating part having a clamping channel for the screw nut part to penetrate, and the clamping channel is provided with a clamping structure that can clamp the middle part of the screw nut part, the outer sides of both ends of the middle-drive spindle are respectively provided with tool-mounting slides arranged parallel to each other, the tool-mounting slide is connected to a slide drive mechanism that can drive the tool-mounting slide to move axially, one end of the tool-mounting slide is provided with an online probe assembly and the other end is provided with a turning tool assembly, and an outer circle and inner hole grinding assembly and an internal thread grinding assembly are respectively provided between the online probe assembly and the turning tool assembly. The mid-drive spindle cooperates with the clamping channel and clamping structure to achieve precise positioning and stable clamping of the workpiece, providing a basis for high-precision machining. At the same time, the tool-mounting slides at both ends integrate the turning tool assembly, outer circle and inner hole grinding assembly, internal thread grinding assembly and online probe assembly, integrating the turning, grinding and inspection processes. At the same time, turning, grinding and other processing operations are performed on both ends of the screw and nut parts, reducing the workpiece clamping time and improving machining efficiency.

[0006] In the above-mentioned synchronous grinding device for double-sided grinding of the internal thread of a screw nut, the online probe assembly, the turning tool assembly, the outer circle inner hole grinding assembly and the internal thread grinding assembly on the two tool-mounting slides are respectively arranged in a one-to-one correspondence, and the online probe assembly has a probe seat, one end of which is provided with a measuring rod, and the turning tool assembly has a turning tool seat, one end of which is provided with a turning tool part; or, the turning tool assembly is a power turret device. The symmetrical layout design enables the device to process both ends of the screw nut part at the same time, improving processing efficiency and ensuring processing accuracy. The measuring rod of the online probe assembly can detect the workpiece size in real time during the processing, provide data support for the dynamic adjustment of processing parameters, and realize closed-loop control of processing accuracy. The turning tool part of the turning tool assembly can complete the turning process, remove most of the processing allowance, lay the foundation for the subsequent grinding process, and improve overall processing efficiency.

[0007] In the aforementioned synchronous double-sided grinding device for internal threads of a lead screw nut, grinding wheel dressers are located outside the center drive spindle, circumferentially outwardly at each end of the spindle's rotating portion. The grinding wheel dressers enable online dressing during the grinding process, promptly correcting shape errors caused by wear of the turning tool or grinding head, ensuring that the turning tool or grinding head consistently maintains optimal cutting performance.

[0008] In the above-mentioned synchronous grinding device for double-sided grinding of the internal thread of a lead screw nut, a clamping mounting portion is provided at one end of the clamping channel, and clamping inclined surfaces are respectively provided at both ends of the clamping mounting portion. A partition protrusion is provided between the two clamping inclined surfaces, and the inner diameter of the clamping inclined surface close to one end of the partition protrusion gradually increases to the other end; the clamping structure includes a clamping block arranged on the circumferential inner side of the clamping inclined surface, a clamping block inclined surface matching the clamping inclined surface is provided on the circumferential outer side of the clamping block, a clamping block fixing portion is respectively provided at both ends of the partition protrusion, and a clamping block fixing groove corresponding to the clamping block fixing portion is respectively provided on the outer side of one end of the clamping block close to the partition protrusion, and the lead screw nut part is arranged between the two clamping blocks. The cooperation between the clamping block fixing portion and the clamping block fixing groove limits the circumferential movement of the clamping block and prevents the workpiece from loosening during processing. This structure not only improves the clamping reliability, but also facilitates the disassembly and maintenance of the clamping block.

[0009] In the above-mentioned double-sided synchronous grinding device for the internal thread of a screw nut, the outer circle and inner hole grinding assembly has an outer circle and inner hole grinding electric spindle, the outer circle and inner hole grinding electric spindle has an outer circle and inner hole grinding rod at one end close to the middle drive spindle, and the outer circle and inner hole grinding rod has an outer circle and inner hole grinding head at one end away from the outer circle and inner hole grinding electric spindle.

[0010] In the aforementioned synchronous double-sided grinding device for the internal threads of a lead screw nut, the internal thread grinding assembly comprises an internal thread grinding electric spindle, the internal thread grinding electric spindle having an internal thread grinding rod at one end close to the central drive spindle, and the internal thread grinding rod having an internal thread grinding head at one end away from the internal thread grinding electric spindle. The external cylindrical inner hole grinding assembly and the internal thread grinding assembly are respectively equipped with an external cylindrical inner hole grinding head and an internal thread grinding head, with a clear division of labor. They can simultaneously complete the external cylindrical grinding and thread grinding processes, reducing tool change time. The electric spindle directly drives the grinding head, resulting in a short transmission chain and a fast response speed, enabling high-speed, high-precision grinding. The independent drive shaft design facilitates the replacement of grinding heads of different specifications to meet diverse processing needs.

[0011] In the above-mentioned synchronous grinding device for double-sided grinding of the internal thread of a screw nut, the internal thread grinding head has a grinding head portion, and the outer circumferential side of the grinding head portion has an inclined grinding surface inclined toward the inner side of the screw nut part, and the inner circumferential side of the screw nut part is provided with a single-head internal thread with an internal thread groove. The inclined grinding surface of the internal thread grinding head on the tool mounting slide on the left of the two tool mounting slides corresponds to the right side surface of the internal thread groove, and the inclined grinding surface of the internal thread grinding head on the tool mounting slide on the right corresponds to the left side surface of the internal thread groove. ; Or, the internal thread grinding head has a plurality of grinding heads, and the circumferential outer sides of the grinding heads respectively have inclined grinding surfaces inclined in the same direction toward the inner side of the screw nut part, and the circumferential inner side of the screw nut part is provided with a multi-head internal thread with a plurality of internal thread grooves, and the inclined grinding surfaces of the internal thread grinding head on the tool mounting slide on the left of the two tool mounting slides respectively correspond to the right side surfaces of each internal thread groove, and the inclined grinding surfaces of the internal thread grinding head on the tool mounting slide on the right respectively correspond to the left side surfaces of each internal thread groove.

[0012] A method for synchronously grinding the internal thread of a screw nut on both sides, the method comprising the following steps:

[0013] S1. The screw and nut parts are placed in the clamping channel of the middle drive spindle. The clamping structure clamps the screw and nut parts, and the middle drive spindle drives the screw and nut parts to rotate.

[0014] S2. The tool-mounting slide is driven to move by the slide drive mechanism, and the turning tool assembly, the outer circle and inner hole grinding assembly and the internal thread grinding assembly perform turning, internal thread grinding and outer circle and inner hole grinding on the screw nut parts.

[0015] In the above-mentioned method for synchronous double-sided grinding of the internal thread of a screw nut, the step S2 includes the following steps:

[0016] S21. When grinding the internal thread groove of the screw nut part, the two tool-mounting slides move relative to each other toward the two ends of the screw nut part, the internal thread grinding head on the left tool-mounting slide penetrates the inner side of the left end of the screw nut part and moves toward the right end, and at the same time, the internal thread grinding head on the right tool-mounting slide penetrates the inner side of the right end of the screw nut part and moves toward the left end, the inclined grinding surface of the internal thread grinding head on the left tool-mounting slide grinds the right side of the internal thread groove, and the inclined grinding surface of the internal thread grinding head on the right tool-mounting slide grinds the left side of the internal thread groove;

[0017] S22. When grinding to the middle position of the internal thread groove, the internal thread grinding head on the tool mounting slide on the left continues to move toward the right end of the screw nut part. At the same time, the internal thread grinding head on the tool mounting slide on the right pulls out the screw nut part and the outer circle and inner hole grinding head on the tool mounting slide on the right grinds the outer circle of the right end of the screw nut part. When the internal thread grinding head on the tool mounting slide on the left finishes grinding the right side of the internal thread groove, the internal thread grinding head on the tool mounting slide on the left pulls out the screw nut part and the outer circle and inner hole grinding head on the tool mounting slide on the left grinds the screw nut part. The outer circle is ground at the left end, and at the same time, the internal thread grinding head on the tool-mounting slide on the right is re-inserted into the screw nut part to the middle position of the internal thread groove to grind the remaining left side of the internal thread groove; or, when grinding to the middle position of the internal thread groove, the internal thread grinding head on the tool-mounting slide on the left continues to move toward the right end of the screw nut part, and at the same time, the internal thread grinding head on the tool-mounting slide on the right is staggered with the internal thread grinding head on the tool-mounting slide on the left and continues to move toward the left end of the screw nut part until the left and right sides of the internal thread groove are completely ground.

[0018] In the above-mentioned method for synchronous double-sided grinding of the internal thread of a screw nut, in the early stage of processing the screw nut parts, the step S2 first grinds and dresses the turning tool assembly, the outer circle and inner hole grinding assembly and the internal thread grinding assembly through the grinding wheel dressing wheel. After step S2 completes the processing of the screw nut parts, the online probe assembly monitors the processing status in real time through the control system and detects the processing accuracy.

[0019] Compared with the existing technology, the advantages of the present invention are:

[0020] 1. The device integrates multiple processes such as turning, grinding and online detection. Through the symmetrical layout of two tool-mounting slides, it can achieve synchronous processing of both ends of the workpiece, reduce the number of workpiece clamping times, significantly shorten the processing cycle, and improve work efficiency.

[0021] 2. The device's internal thread grinding head has a multi-grinding head design that can correspond one-to-one with multiple internal thread grooves, completing multi-thread grinding at the same time, which improves efficiency compared to traditional single-head processing. In addition, the design of the inclined grinding surface allows for one-time grinding without rotating the grinding head angle, thereby avoiding interference between the shaft and the inner hole of the workpiece.

[0022] 3. The online probe assembly of the device can detect the workpiece size in real time after processing. After the detection data is fed back to the control system, the feed rate of the turning tool assembly or the grinding parameters of the grinding head assembly can be adjusted in time to achieve closed-loop control of processing accuracy and reduce the scrap rate.

[0023] 4. The grinding wheel dressing wheel of this device can perform online dressing on the external cylindrical inner hole grinding head and the internal thread grinding head during the grinding process, ensuring that the grinding head always remains sharp, avoiding fluctuations in processing quality due to grinding head wear, and at the same time reducing downtime for dressing, further improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of embodiment 1 of the present invention.

[0025] Figure 2 It is a structural sectional view of the middle drive main shaft in the first embodiment of the present invention.

[0026] Figure 3 It is an internal cross-sectional view of the middle drive main shaft in the first embodiment of the present invention.

[0027] Figure 4 It is a structural schematic diagram of the clamping block in embodiment 1 of the present invention.

[0028] Figure 5 It is a structural schematic diagram of the internal thread grinding rod in embodiment 1 of the present invention.

[0029] Figure 6 It is a structural cross-sectional view of the internal thread processing in Example 1 of the present invention.

[0030] Figure 7 This is the first embodiment of the present invention Figure 6 A magnified view of the structure at point A in the middle.

[0031] Figure 8 This is the first embodiment of the present invention Figure 6 A magnified view of the structure at point B.

[0032] Figure 9 It is a structural schematic diagram of the internal thread grinding rod in the second embodiment of the present invention.

[0033] Figure 10 It is a structural cross-sectional view of the internal thread processing in the second embodiment of the present invention.

[0034] Figure 11This is the second embodiment of the present invention Figure 10 Enlarged view of the structure at point C in the middle.

[0035] Figure 12 This is the second embodiment of the present invention Figure 10 Enlarged view of the structure at point D in the middle.

[0036] In the figure: the middle drive spindle 1, the spindle rotating part 11, the clamping channel 12, the screw nut part 13, the grinding wheel dressing wheel 14, the clamping mounting part 15, the clamping inclined surface 16, the separating protrusion 17, the clamping structure 2, the clamping block 21, the clamping block inclined surface 22, the clamping block fixing part 23, the clamping block fixing groove 24, the tool mounting slide 3, the online probe assembly 4, the probe seat 41, the measuring rod 42, the turning tool assembly 5, the turning tool seat 51, the turning tool part 52, the outer circle and inner hole grinding assembly 6, the outer circle and inner hole grinding electric spindle 61, the outer circle and inner hole grinding rod 62, the outer circle and inner hole grinding head 63, the internal thread grinding assembly 7, the internal thread grinding electric spindle 71, the internal thread grinding rod 72, the internal thread grinding head 73, the grinding head 74, the inclined grinding surface 75, the internal thread groove 76, the right side 77, and the left side 78. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Example 1

[0039] like Figure 1-8 As shown, a synchronous grinding device for double-sided grinding of the internal thread of a screw nut comprises a middle drive spindle 1 with a spindle rotating part 11, the spindle rotating part 11 has a clamping channel 12 on the circumferential inner side thereof for the screw nut part 13 to penetrate, and a clamping structure 2 is provided in the clamping channel 12 which can clamp the middle part of the screw nut part 13, tool mounting slides 3 arranged parallel to each other are movably provided on the outer sides of both ends of the middle drive spindle 1, the tool mounting slide 3 is connected to a slide driving mechanism which can drive the tool mounting slide 3 to move axially, an online probe assembly 4 is provided at one end of the tool mounting slide 3 and a turning tool assembly 5 is provided at the other end, and an outer circle and inner hole grinding assembly 6 and an internal thread grinding assembly 7 are respectively provided between the online probe assembly 4 and the turning tool assembly 5. The center-drive spindle 1 cooperates with the clamping channel 12 and the clamping structure 2 to achieve precise positioning and stable clamping of the workpiece, providing a basis for high-precision processing. At the same time, the tool-mounting slides 3 at both ends integrate the turning tool assembly 5, the outer circle and inner hole grinding assembly 6, the internal thread grinding assembly 7 and the online probe assembly 4, integrating the turning, grinding and inspection processes, and performing turning, grinding and other processing operations on both ends of the screw nut part 13 at the same time, reducing the workpiece clamping time and improving processing efficiency.

[0040] like Figure 1As shown, the online probe assembly 4, the turning tool assembly 5, the outer cylindrical inner hole grinding assembly 6, and the internal thread grinding assembly 7 on the two tool mounting slides 3 are respectively arranged in a one-to-one correspondence. The online probe assembly 4 has a probe base 41, and a measuring rod 42 is provided at one end of the probe base 41. The turning tool assembly 5 has a turning tool seat 51, and a turning tool part 52 is provided at one end of the turning tool seat 51; alternatively, the turning tool assembly 5 is a power turret device. The symmetrical layout design enables the device to process both ends of the screw nut part 13 simultaneously, improving processing efficiency and ensuring processing accuracy. The measuring rod 42 of the online probe assembly 4 can detect the workpiece size in real time during the processing, providing data support for the dynamic adjustment of processing parameters and realizing closed-loop control of processing accuracy. The turning tool part 52 of the turning tool assembly 5 can complete the turning process, remove most of the processing allowance, lay the foundation for the subsequent grinding process, and improve overall processing efficiency.

[0041] like Figure 2 As shown, grinding wheel dressing wheels 14 are respectively provided on the outer sides of the central drive spindle 1 at the circumferential sides of both ends of the spindle rotating part 11. The provision of the grinding wheel dressing wheels 14 enables online dressing during the grinding process, which can promptly correct the shape errors caused by wear of the turning tool or grinding head, ensuring that the turning tool or grinding head always maintains ideal cutting performance.

[0042] Combine Figure 2-Figure 4 As shown, a clamping mounting portion 15 is provided at one end of the clamping channel 12, and a clamping inclined surface 16 is provided at both ends of the clamping mounting portion 15. A separation protrusion 17 is provided between the two clamping inclined surfaces 16, and the inner diameter of the clamping inclined surface 16 gradually increases from one end close to the separation protrusion 17 to the other end. The clamping structure 2 includes a clamping block 21 arranged on the circumferential inner side of the clamping inclined surface 16, and a clamping block inclined surface 22 is provided on the circumferential outer side of the clamping block 21 to match the clamping inclined surface 16. A clamping block fixing portion 23 is provided at both ends of the separation protrusion 17, and a clamping block fixing groove 24 corresponding to the clamping block fixing portion 23 is provided on the outer side of one end of the clamping block 21 close to the separation protrusion 17, and the screw nut part 13 is arranged between the two clamping blocks 21. The cooperation between the clamping block fixing portion 23 and the clamping block fixing groove 24 limits the circumferential movement of the clamping block 21 and prevents the workpiece from loosening during processing. This structure not only improves the clamping reliability, but also facilitates the disassembly and maintenance of the clamping block 21.

[0043] like Figure 1 As shown, the outer circle and inner hole grinding assembly 6 has an outer circle and inner hole grinding electric spindle 61, and the outer circle and inner hole grinding electric spindle 61 has an outer circle and inner hole grinding rod 62 at one end close to the middle drive spindle 1, and an outer circle and inner hole grinding head 63 at one end of the outer circle and inner hole grinding electric spindle 61 away from the outer circle and inner hole grinding electric spindle 61.

[0044] The internal thread grinding assembly 7 includes an internal thread grinding motorized spindle 71. The internal thread grinding motorized spindle 71 has an internal thread grinding rod 72 at the end closest to the center drive spindle 1, and an internal thread grinding head 73 at the end of the internal thread grinding rod 72 away from the internal thread grinding motorized spindle 71. The external cylindrical and internal hole grinding assembly 6 and the internal thread grinding assembly 7 are equipped with an external cylindrical and internal hole grinding head 63 and an internal thread grinding head 73, respectively. With a clear division of labor, they can simultaneously complete the external cylindrical grinding and thread grinding processes, reducing tool change time. The motorized spindle directly drives the grinding head, resulting in a short transmission chain and fast response speed, enabling high-speed, high-precision grinding. The independent drive shaft design facilitates the replacement of grinding heads of different specifications to meet diverse processing needs.

[0045] Combine Figure 5-Figure 8 As shown, the internal thread grinding head 73 has a grinding head portion 74, and the grinding head portion 74 has an inclined grinding surface 75 on the circumferential outer side inclined toward the inner side of the screw nut part 13, and the screw nut part 13 is provided with a single-head internal thread with an internal thread groove 76 on the circumferential inner side. The inclined grinding surface 75 of the internal thread grinding head 73 on the tool mounting slide 3 on the left of the two tool mounting slides 3 corresponds to the right side surface 77 of the internal thread groove 76, and the inclined grinding surface 75 of the internal thread grinding head 73 on the tool mounting slide 3 on the right corresponds to the left side surface 78 of the internal thread groove 76.

[0046] Among them, a method for synchronous double-sided grinding of the internal thread of a screw nut comprises the following steps:

[0047] S1. The screw nut part 13 is placed in the clamping channel 12 of the middle drive spindle 1. The clamping structure 2 clamps the screw nut part 13, and the middle drive spindle 1 drives the screw nut part 13 to rotate;

[0048] S2. The tool mounting slide 3 is driven to move by the slide drive mechanism, and the turning tool assembly 5, the outer circle inner hole grinding assembly 6 and the internal thread grinding assembly 7 perform turning, internal thread grinding and outer circle inner hole grinding on the screw nut part 13.

[0049] Specifically, step S2 includes the following steps:

[0050] S21, when grinding the internal thread groove 76 of the screw nut part 13, the two tool-mounting slides 3 move relative to each other toward the two ends of the screw nut part 13, the internal thread grinding head 73 on the left tool-mounting slide 3 penetrates into the inner side of the left end of the screw nut part 13 and moves toward the right end, and at the same time, the internal thread grinding head 73 on the right tool-mounting slide 3 penetrates into the inner side of the right end of the screw nut part 13 and moves toward the left end, the inclined grinding surface 75 of the internal thread grinding head 73 on the left tool-mounting slide 3 grinds the right side 77 of the internal thread groove 76, and the inclined grinding surface 75 of the internal thread grinding head 73 on the right tool-mounting slide 3 grinds the left side 78 of the internal thread groove 76;

[0051] S22, when grinding to the middle position of the internal thread groove 76, the internal thread grinding head 73 on the tool mounting slide 3 on the left side continues to move toward the right end of the screw nut part 13, and at the same time, the internal thread grinding head 73 on the tool mounting slide 3 on the right side pulls out the screw nut part 13 and the outer circle and inner hole grinding head 63 on the tool mounting slide 3 on the right side grinds the outer circle of the right end of the screw nut part 13. When the internal thread grinding head 73 on the tool mounting slide 3 on the left side grinds all the right side surfaces 77 of the internal thread groove 76, the internal thread grinding head 73 on the tool mounting slide 3 on the left side pulls out the screw nut part 13 and the outer circle and inner hole grinding head 63 on the tool mounting slide 3 on the left side grinds the outer circle of the screw nut part 1 3 is ground at the left end thereof, and at the same time, the internal thread grinding head 73 on the right tool-mounting slide 3 re-enters the lead screw nut part 13 to the middle position of the internal thread groove 76 to grind the remaining left side surface 78 of the internal thread groove 76; or, when grinding to the middle position of the internal thread groove 76, the internal thread grinding head 73 on the left tool-mounting slide 3 continues to move toward the right end of the lead screw nut part 13, and at the same time, the internal thread grinding head 73 on the right tool-mounting slide 3 is staggered with the internal thread grinding head 73 on the left tool-mounting slide 3 and continues to move toward the left end of the lead screw nut part 13 until the left side surface 78 and the right side surface 77 of the internal thread groove 76 are completely ground.

[0052] At the same time, in the early stage of processing the screw nut part 13, step S2 first grinds and dresses the turning tool assembly 5, the outer circle and inner hole grinding assembly 6 and the internal thread grinding assembly 7 through the grinding wheel dressing wheel 14. After step S2 completes the processing of the screw nut part 13, the online probe assembly 4 monitors the processing status in real time through the control system and detects the processing accuracy.

[0053] The principle of this embodiment is:

[0054] The screw nut part 13 passes through the clamping channel 12 into the middle drive spindle 1, and the clamping block 21 clamps the screw nut part 13 through hydraulic drive. The spindle rotating part 11 of the middle drive spindle 1 drives the screw nut part 13 to rotate. The grinding wheel dressing wheels 14 at both ends of the spindle rotating part 11 are used to dress the surface of the outer circle inner hole grinding head 63 and the internal thread grinding head 73 to ensure the shape accuracy of the grinding wheel and maintain the stability of the processing quality; the slide drive mechanism drives the tool slide 3 to move, realizing the turning tool assembly 5, the outer circle inner hole grinding assembly 6, and the internal thread grinding The positions of the component 7 and the online probe component 4 are adjusted. At the same time, the online probe component 4, the turning tool component 5, the outer circle and inner hole grinding component 6, and the internal thread grinding component 7 on the two tool mounting slides 3 correspond to each other one by one, and the two ends of the workpiece can be processed synchronously to improve the processing efficiency and processing accuracy. The turning tool component 5 is used for rough processing of the outer circle and end face, the outer circle and inner hole grinding component 6 is used for fine processing of the outer ring and end face, and the internal thread grinding component 7 is used for internal thread grinding. After turning or grinding, the measuring rod 42 contacts the workpiece surface to detect the processing size in real time.

[0055] Example 2

[0056] Combine Figure 9-12 As shown, the principles and steps of this embodiment are similar to those of the first embodiment, with the difference being that, in the first embodiment, the internal thread grinding head 73 has a single grinding head 74. In this embodiment, the internal thread grinding head 73 has multiple grinding heads 74, each of which has inclined grinding surfaces 75 arranged in the same direction, tilted toward the inside of the screw nut component 13, on the circumferential inner side of the screw nut component 13. Multiple internal threads with multiple internal thread grooves 76 are provided on the circumferential inner side of the screw nut component 13. The inclined grinding surfaces 75 of the internal thread grinding head 73 on the left-hand tool-mounting slide 3 of the two tool-mounting slides 3 correspond one-to-one with the right side surfaces 77 of each internal thread groove 76, and the inclined grinding surfaces 75 of the internal thread grinding head 73 on the right-hand tool-mounting slide 3 correspond one-to-one with the left side surfaces 78 of each internal thread groove 76. This structural design allows for simultaneous grinding of multiple threads, significantly reducing processing time. It also covers the entire length of the thread, avoids tool marks associated with traditional one-way grinding, and improves the surface finish of the thread.

[0057] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0058] Although this article uses more terms such as the mid-drive spindle 1, spindle rotating part 11, clamping channel 12, screw nut part 13, grinding wheel dressing wheel 14, clamping mounting part 15, clamping inclined surface 16, partition protrusion 17, clamping structure 2, clamping block 21, clamping block inclined surface 22, clamping block fixing part 23, clamping block fixing groove 24, tool mounting slide 3, online probe assembly 4, probe seat 41, measuring rod 42, turning tool assembly 5, turning tool seat 51, turning tool part 52, outer cylindrical and inner hole grinding assembly 6, outer cylindrical and inner hole grinding electric spindle 61, outer cylindrical and inner hole grinding rod 62, outer cylindrical and inner hole grinding head 63, internal thread grinding assembly 7, internal thread grinding electric spindle 71, internal thread grinding rod 72, internal thread grinding head 73, grinding head 74, inclined grinding surface 75, internal thread groove 76, right side 77, left side 78, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; any additional limitation construed in them would be contrary to the spirit of the present invention.

Claims

1. A synchronous double-sided grinding device for internal threads of a screw nut, comprising a central drive spindle (1) having a spindle rotating portion (11), characterized in that: The spindle rotating part (11) has a clamping channel (12) on the inner side thereof for the screw nut part (13) to pass through, and a clamping structure (2) capable of clamping the middle part of the screw nut part (13) is provided in the clamping channel (12). The outer sides of both ends of the central drive spindle (1) are respectively provided with tool mounting slides (3) arranged parallel to each other. The tool mounting slide (3) is connected to a slide driving mechanism capable of driving the tool mounting slide (3) to move horizontally and vertically. An online probe assembly (4) is provided at one end of the tool mounting slide (3) and a turning tool assembly (5) is provided at the other end. An outer circle inner hole grinding assembly (6) and an inner thread grinding assembly (7) are respectively provided between the online probe assembly (4) and the turning tool assembly (5).

2. A synchronous double-sided grinding device for internal threads of a lead screw nut according to claim 1, characterized in that: The online probe assembly (4), the turning tool assembly (5), the outer circle inner hole grinding assembly (6) and the internal thread grinding assembly (7) on the two tool mounting slides (3) are respectively arranged in a one-to-one correspondence, and the online probe assembly (4) has a probe seat (41), one end of which is provided with a measuring rod (42), and the turning tool assembly (5) has a turning tool seat (51), one end of which is provided with a turning tool part (52); or, the turning tool assembly (5) is a power tool turret device.

3. The double-sided synchronous grinding device for the internal thread of a lead screw nut according to claim 1, characterized in that: Grinding wheel dressing wheels (14) located outside the middle drive main shaft (1) are respectively provided on the circumferential outer sides of both ends of the main shaft rotating part (11).

4. A synchronous double-sided grinding device for internal threads of a lead screw nut according to claim 1, 2 or 3, characterized in that: The clamping channel (12) is provided with a clamping mounting portion (15) at one end, and the clamping mounting portion (15) has clamping inclined surfaces (16) at both ends respectively, and a separation protrusion (17) is provided between the two clamping inclined surfaces (16), and the inner diameter of the clamping inclined surface (16) close to one end of the separation protrusion (17) gradually increases to the other end; the clamping structure (2) includes a clamping block (21) arranged on the circumferential inner side of the clamping inclined surface (16), and the clamping block (21) is provided with a clamping block inclined surface (22) matching the clamping inclined surface (16) on the circumferential outer side, and clamping block fixing portions (23) are respectively provided at both ends of the separation protrusion (17), and the clamping block (21) is provided with a clamping block fixing groove (24) corresponding to the clamping block fixing portion (23) on the outer side of one end close to the separation protrusion (17), and the screw nut part (13) is clamped and fixed between the two clamping blocks (21).

5. The double-sided synchronous grinding device for the internal thread of a lead screw nut according to claim 1, characterized in that: The outer circle and inner hole grinding assembly (6) has an outer circle and inner hole grinding electric spindle (61), the outer circle and inner hole grinding electric spindle (61) has an outer circle and inner hole grinding rod (62) at one end close to the middle drive spindle (1), and the outer circle and inner hole grinding rod (62) has an outer circle and inner hole grinding head (63) at one end away from the outer circle and inner hole grinding electric spindle (61).

6. The device for synchronously grinding the internal thread of a screw nut and a double-sided grinder according to claim 1, characterized in that: The internal thread grinding assembly (7) comprises an internal thread grinding electric spindle (71), an internal thread grinding rod (72) is provided at one end of the internal thread grinding electric spindle (71) close to the middle drive spindle (1), and an internal thread grinding head (73) is provided at one end of the internal thread grinding rod (72) away from the internal thread grinding electric spindle (71).

7. A synchronous double-sided grinding device for internal threads of a lead screw nut according to claim 6, characterized in that: The internal thread grinding head (73) has a grinding head portion (74), and the grinding head portion (74) has an inclined grinding surface (75) tilted toward the inner side of the screw nut part (13) on the circumferential outer side, and the screw nut part (13) is provided with a single-head internal thread with an internal thread groove (76) on the circumferential inner side, and the inclined grinding surface (75) of the internal thread grinding head (73) on the left tool mounting slide (3) of the two tool mounting slides (3) corresponds to the right side surface (77) of the internal thread groove (76), and the inclined grinding surface (75) of the internal thread grinding head (73) on the right tool mounting slide (3) corresponds to the left side surface (78) of the internal thread groove (76); or, the internal thread grinding head (73) has a plurality of grinding heads (74), and the outer circumferential sides of the grinding heads (74) respectively have inclined grinding surfaces (75) inclined in the same direction toward the inner side of the screw nut part (13), and the inner circumferential side of the screw nut part (13) is provided with a multi-head internal thread with a plurality of internal thread grooves (76). The inclined grinding surfaces (75) of the internal thread grinding heads (73) on the tool mounting slide (3) on the left of the two tool mounting slides (3) respectively correspond to the right side surfaces (77) of each internal thread groove (76), and the inclined grinding surfaces (75) of the internal thread grinding heads (73) on the tool mounting slide (3) on the right respectively correspond to the left side surfaces (78) of each internal thread groove (76).

8. A method for synchronously grinding the internal threads of a screw nut and a device ... according to claims 1 to 7, characterized in that: This method comprises the following steps: S1, the screw nut part (13) is placed in the clamping channel (12) of the middle drive main shaft (1), the clamping structure (2) clamps the screw nut part (13), and the middle drive main shaft (1) drives the screw nut part (13) to rotate; S2, the tool mounting slide (3) is driven to move by the slide drive mechanism, and the turning tool assembly (5), the outer circle inner hole grinding assembly (6) and the internal thread grinding assembly (7) perform turning, internal thread grinding and outer circle inner hole grinding on the screw nut part (13).

9. The method for synchronous double-sided grinding of the internal thread of a lead screw nut according to claim 8, characterized in that: The step S2 comprises the following steps: S21, when grinding the internal thread groove (76) of the screw nut part (13), the two tool-mounting slides (3) move relative to each other toward the two ends of the screw nut part (13), the internal thread grinding head (73) on the tool-mounting slide (3) on the left side penetrates into the inner side of the left end of the screw nut part (13) and moves toward the right end, and at the same time, the internal thread grinding head (73) on the tool-mounting slide (3) on the right side penetrates into the inner side of the right end of the screw nut part (13) and moves toward the left end, the inclined grinding surface (75) of the internal thread grinding head (73) on the tool-mounting slide (3) on the left side grinds the right side (77) of the internal thread groove (76), and the inclined grinding surface (75) of the internal thread grinding head (73) on the tool-mounting slide (3) on the right side grinds the left side (78) of the internal thread groove (76); S22, when grinding to the middle position of the internal thread groove (76), the internal thread grinding head (73) on the tool mounting slide (3) on the left side continues to move toward the right end of the screw nut part (13), and at the same time, the internal thread grinding head (73) on the tool mounting slide (3) on the right side pulls out the screw nut part (13) and the outer circle inner hole grinding head (63) on the tool mounting slide (3) on the right side grinds the outer circle of the right end of the screw nut part (13). When the internal thread grinding head (73) on the tool mounting slide (3) on the left side grinds all the right side (77) of the internal thread groove (76), the internal thread grinding head (73) on the tool mounting slide (3) on the left side pulls out the screw nut part (13) and the outer circle inner hole grinding head (63) on the tool mounting slide (3) on the left side grinds the outer circle of the screw nut part (13). 13) is ground at the left end thereof, and at the same time, the internal thread grinding head (73) on the tool mounting slide (3) on the right side is re-entered into the lead screw nut part (13) to the middle position of the internal thread groove (76) to grind the remaining left side (78) of the internal thread groove (76); or, when grinding to the middle position of the internal thread groove (76), the internal thread grinding head (73) on the tool mounting slide (3) on the left side continues to move toward the right end of the lead screw nut part (13), and at the same time, the internal thread grinding head (73) on the tool mounting slide (3) on the right side is staggered with the internal thread grinding head (73) on the tool mounting slide (3) on the left side and continues to move toward the left end of the lead screw nut part (13) until the left side (78) and the right side (77) of the internal thread groove (76) are completely ground.

10. A method for synchronous double-sided grinding of the internal thread of a lead screw nut according to claim 9, characterized in that: In the step S2, in the early stage of processing the screw nut part (13), the turning tool assembly (5), the outer circle inner hole grinding assembly (6) and the internal thread grinding assembly (7) are first ground and trimmed by the grinding wheel dressing wheel (14). After the step S2 completes the processing of the screw nut part (13), the online probe assembly (4) monitors the processing status in real time through the control system to detect the processing accuracy.

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