Four main shaft numerical control combined grinding special machine

Abstract

The application relates to the technical field of grinding machine tools, and discloses a four-spindle numerical control combined grinding special machine, which comprises a base, an outer diameter grinding abrasive wheel and an electric sliding table arranged on the base, clamps and a motor arranged on the electric sliding table, a flexible shaft connected to a motor output shaft, and the other end of the flexible shaft being connected with the clamps, the clamps being arranged in pairs, the clamps being arranged on the two sides of the outer diameter grinding abrasive wheel, a mounting seat being arranged on the electric sliding table, the clamps being arranged in the mounting seat, a liquid cavity being arranged in the mounting seat, a first liquid pipe and a second liquid pipe being arranged on the outside of the mounting seat, the first liquid pipe and the second liquid pipe being respectively communicated with the liquid cavity, a liquid pump being arranged on the base, and the liquid outlet end of the liquid pump being connected with the liquid cavity pipeline. The two sides of the outer diameter grinding abrasive wheel are respectively subjected to frictional forces from workpieces, the outer diameter grinding abrasive wheel is subjected to more uniform forces as a whole, the equipment runs stably, and the grinding efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of grinding machine tool technology, specifically to a four-spindle CNC combined grinding machine. Background Technology

[0002] A CNC combination grinding machine is an integrated grinding machine tool that uses multiple motors to servo feed the workpiece, enabling sequential grinding of multiple parts of a single workpiece.

[0003] For example, Chinese patent application CN116038516A discloses a dressing grinding machine tool, including a bed that provides stable support; a dresser is fixedly installed on one side of the top of the bed; a workpiece holder is fixed on the other side of the top of the bed; a grinding wheel holder plate is movably arranged on the bed, located between the dresser and the workpiece holder; and a moving mechanism is provided on the bed. The beneficial effects of this invention are: the workpiece holder is fixed to the dresser, and the grinding wheel moves back and forth by the reciprocating movement of the grinding wheel holder plate, thus performing grinding and dressing, which is different from the traditional method where the grinding wheel holder is fixed and the workpiece holder moves back and forth to achieve grinding.

[0004] In the aforementioned patent, the workpiece exerts friction on the grinding wheel during grinding operations. This friction causes the grinding wheel to be subjected to force on one side, resulting in unstable operation of the grinding wheel at high speeds. This makes the equipment prone to vibration and increases frictional wear. Therefore, we propose a four-spindle CNC combined grinding machine. Summary of the Invention

[0005] This invention provides a four-spindle CNC combined grinding machine, which can solve the problem mentioned in the background art that when the workpiece exerts friction on the grinding wheel during grinding operations, the grinding wheel is subjected to force on one side, which causes the grinding wheel to be unstable when rotating at high speed, making the equipment prone to vibration and increasing the frictional wear of the equipment.

[0006] To achieve the above objectives, this solution provides a four-spindle CNC combined grinding machine, including a base, on which an outer diameter grinding wheel and an electric slide are mounted. A fixture and a motor are mounted on the electric slide. A flexible shaft is connected to the output shaft of the motor, and the other end of the flexible shaft is connected to the fixture. A pair of fixtures are provided, located on either side of the outer diameter grinding wheel. A mounting base is provided on the electric slide, and the fixture is mounted within the mounting base. A liquid chamber is provided within the mounting base, and a first liquid pipe and a second liquid pipe are provided on the outside of the mounting base. The first liquid pipe and the second liquid pipe are respectively connected to the liquid chamber.

[0007] A liquid pump is installed on the base, and the outlet end of the liquid pump is connected to the liquid chamber pipe.

[0008] Optionally, a baffle for sealing the second liquid tube is provided inside the liquid chamber, a first compression spring is installed inside the liquid chamber, the other end of the first compression spring is connected to the baffle, the edges of the baffle are rounded, and an abutment rod is installed on the clamp, the abutment rod intermittently abuts against the baffle.

[0009] Optionally, a rotating sleeve is installed in the mounting base, the rotating sleeve is connected to the flexible shaft, the clamp is rotatably installed in the rotating sleeve, a first torsion spring is provided in the rotating sleeve, one end of the first torsion spring is connected to the rotating sleeve, and the other end of the first torsion spring is connected to the clamp.

[0010] The rotating sleeve has a through groove, and the abutment rod is slidably disposed in the through groove.

[0011] Optionally, a pair of flat plates are provided on the electric slide, and a rotating block is installed on the flat plate. The rotating block is fixedly connected to the mounting base. A second torsion spring is provided in the lower flat plate. One end of the second torsion spring is connected to the flat plate, and the other end of the second torsion spring is connected to the rotating block.

[0012] Optionally, a constant pressure through groove is formed in the upper plate, which is connected to the outside. A flow channel is formed in the rotating block, and a connecting groove is connected to the top of the flow channel. The connecting groove is connected to the constant pressure through groove. A push plate is provided on the rotating block, and the push plate is slidably installed in the constant pressure through groove.

[0013] A sealing plate is provided at the top of the constant pressure through groove, a limit plate is provided at one end of the sealing plate, and a spring plate for limiting the push plate is installed on the side of the limit plate.

[0014] Optionally, a chute is provided in the liquid cavity, a slide plate is installed in the chute, a tension spring is provided in the slide plate, the other end of the tension spring is connected to the slide plate, a first through hole is opened on the slide plate, the first through hole communicates with the liquid cavity, a second through hole is opened in the chute, and the second through hole communicates with the flow channel.

[0015] Optionally, the abutment rod is slidably inserted into the clamp, the clamp is provided with a second compression spring inside, the other end of the second compression spring is connected to the abutment rod, a guide block is installed on the side of the abutment rod, and a guide strip is provided on the inner wall of the through groove for abutting against the guide block.

[0016] Optionally, a lever is hinged to the slide plate, and a third torsion spring is provided at the end of the lever. One end of the third torsion spring is connected to the lever, and the other end of the third torsion spring is connected to the slide plate.

[0017] When the grinding force on the workpiece decreases, the abutment rod abuts against the lever plate.

[0018] Optionally, a bolt is threaded onto the upper plate, one side of which is fixedly connected to the sealing plate. A pointer is provided on the sealing plate, and a scale corresponding to the pointer is provided on the plate.

[0019] Optionally, the base is also provided with a flat grinding wheel for grinding the end face of the workpiece.

[0020] Through the above technical solution, the four-spindle CNC combined grinding machine provided by this solution grinds the workpiece on both sides of the outer diameter grinding wheel, so that the outer diameter grinding wheel is subjected to frictional force from the workpiece on both sides, making the overall force of the outer diameter grinding wheel more uniform. This not only reduces the vibration effect of the outer diameter grinding wheel itself, making the equipment run smoothly, but also grinds two workpieces at the same time, improving grinding efficiency. Moreover, every time the fixture rotates, the contact rod on the fixture contacts the baffle once, causing the baffle to move towards compressing the first compression spring, so that the second liquid pipe is connected to the liquid chamber, and then the cutting fluid is sprayed out from the second liquid pipe 205 to cool the workpiece. This intermittent cooling method can prevent frictional heat from causing thermal damage to the workpiece surface, and at the same time prevent local overcooling of the workpiece from causing thermal stress cracks.

[0021] Furthermore, by monitoring whether the fixture and the rotating sleeve rotate relative to each other, it can be determined whether the workpiece is subjected to frictional force. If the workpiece is not being ground, the mounting base deflects towards the outer diameter grinding wheel, and the angle of the workpiece is finely adjusted so that the workpiece contacts the outer diameter grinding wheel, ensuring that the force on both sides of the outer diameter grinding wheel is balanced.

[0022] Other features and advantages of this solution will be described in detail in the following detailed implementation section. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the installation structure of the clamp of the present invention.

[0026] Figure 3 This is a cross-sectional structural diagram of the mounting base of the present invention.

[0027] Figure 4 This is an exploded structural diagram of the clamp, rotating sleeve, and mounting base of the present invention.

[0028] Figure 5 This is a schematic cross-sectional view of the groove structure of the present invention.

[0029] Figure 6 Appendix to this invention Figure 5 A magnified structural diagram of point A in the middle.

[0030] Figure 7 This is a schematic cross-sectional view of the flat plate of the present invention.

[0031] Figure 8 Appendix to this invention Figure 7 A magnified structural diagram at point B in the middle.

[0032] Figure 9 This is an exploded structural diagram of the bolt, plate, and rotating block of the present invention.

[0033] Figure 10 Appendix to this invention Figure 9 A magnified structural diagram at point C.

[0034] Figure 11 This is a schematic diagram of the mounting structure of the flat grinding wheel of the present invention.

[0035] Explanation of reference numerals in the attached drawings: 101, base; 103, electric slide; 104, clamp; 105, motor; 106, flexible shaft; 107, outer diameter grinding wheel; 108, surface grinding wheel; 1041, contact rod; 1042, second compression spring; 1043, guide block; 201, liquid pump; 204, first liquid pipe; 205, second liquid pipe; 301, mounting base; 302, liquid chamber; 303, rotating sleeve; 304, first torsion spring; 305, first compression spring; 306. Baffle; 307. Rotating block; 308. Flow channel; 309. Connecting groove; 310. Push plate; 311. Through groove; 312. Guide strip; 313. Slide groove; 314. Slide plate; 315. Tension spring; 316. No. 1 through hole; 317. No. 2 through hole; 318. Paddle plate; 319. No. 3 torsion spring; 401. Flat plate; 402. Bolt; 403. No. 2 torsion spring; 404. Constant pressure through groove; 405. Spring plate; 406. Sealing plate; 407. Limiting plate. Detailed Implementation

[0036] To make the aforementioned objectives, features, and advantages of this solution more apparent and understandable, the specific embodiments of this solution are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this solution. However, this solution can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this solution. Therefore, this solution is not limited to the specific embodiments disclosed below.

[0037] In the description of this solution, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this solution and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this solution. The terms "first" and "second" are used to distinguish one element from another and do not have sequential or importance. Furthermore, in the following description, when referring to the accompanying drawings, the same reference numerals in different drawings indicate the same or similar elements, which will not be repeated here.

[0038] In this solution, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this solution based on the specific circumstances.

[0039] Based on some implementation methods of this solution, a four-spindle CNC combined grinding machine is provided, for reference. Figures 1 to 11 As shown, the four-spindle CNC combined grinding machine includes a base 101, on which an outer diameter grinding wheel 107 and an electric slide 103 are mounted. The outer diameter grinding wheel 107 is used to grind the conical surface of the workpiece. In the prior art, the base 101 is equipped with a drive motor for rotating the outer diameter grinding wheel 107, and the electric slide 103 is used for servo feeding of the workpiece. The electric slide 103 is equipped with a clamp 104 and a motor 105. A flexible shaft 106 is connected to the output shaft of the motor 105, and the other end of the flexible shaft 106 is connected to the clamp 104. The clamp 104 is provided in pairs. A pair of clamps 104 are located on both sides of the outer diameter grinding wheel 107. An electric slide table 103 has a mounting base 301. The clamps 104 are installed inside the mounting base 301, which contains a liquid chamber 302. A first liquid pipe 204 and a second liquid pipe 205 are located on the outside of the mounting base 301. The first liquid pipe 204 and the second liquid pipe 205 are respectively connected to the liquid chamber 302. A liquid pump 201 for drawing cutting fluid is installed on the base 101. The inlet of the liquid pump 201 is connected to the cutting fluid container pipe, and the outlet of the liquid pump 201 is connected to the liquid chamber 302 pipe. (See...) Figure 1Liquid pipe 204 is set to correspond to the outer diameter grinding wheel 107, and liquid pipe 205 is set to correspond to the workpiece.

[0040] Therefore, during operation, the outer diameter grinding wheel 107 grinds the workpiece on both sides, resulting in the outer diameter grinding wheel 107 being subjected to frictional forces from the workpiece on both sides. This makes the overall force on the outer diameter grinding wheel 107 more uniform, which not only reduces the vibration effect of the outer diameter grinding wheel 107 itself, making the equipment run smoothly, but also improves grinding efficiency by grinding two workpieces simultaneously. It should be noted that a large amount of frictional heat is generated during the grinding process of the outer diameter grinding wheel 107 on the workpiece. When the outer diameter grinding wheel 107 grinds two workpieces simultaneously, the frictional heat will increase significantly. Therefore, after the equipment has been running for a certain period of time, the liquid pump 201 is started. The liquid pump 201 sends the cutting fluid from the cutting fluid container into the liquid chamber 302, and sprays it out through the first liquid pipe 204 and the second liquid pipe 205 to cool the outer diameter grinding wheel 107 and the workpiece, preventing thermal damage to the workpiece surface.

[0041] It should be noted that in the existing technology, cutting fluids with lower temperatures are often used to achieve the cooling effect. If the cutting fluid with a low temperature is used to cool the workpiece for a long time, it will cause uneven temperature on the surface of the workpiece, resulting in thermal stress cracks and a decrease in the yield of the workpiece.

[0042] Therefore, please refer to Figure 3 Inside the liquid chamber 302, there is a baffle 306 for sealing the second liquid pipe 205. A first compression spring 305 is installed inside the liquid chamber 302, and the other end of the first compression spring 305 is connected to the baffle 306. The edges of the baffle 306 are rounded. A contact rod 1041 is installed on the fixture 104. The contact rod 1041 intermittently contacts the baffle 306. Under normal conditions, the baffle 306 seals the second liquid pipe 205, and the second liquid pipe 205 will not spray cutting fluid to the outside. Every time the fixture 104 rotates one revolution, the contact rod 1041 on the fixture 104 contacts the baffle 306 once, causing the baffle 306 to move in the direction of compressing the first compression spring 305, so that the second liquid pipe 205 is connected to the liquid chamber 302, and then the cutting fluid is sprayed out from the second liquid pipe 205 to cool the workpiece.

[0043] Through the above technical solution, the four-spindle CNC combined grinding machine provided by this solution, when the equipment is running, grinds the workpiece on both sides of the outer diameter grinding wheel 107, so that the outer diameter grinding wheel 107 is subjected to frictional force from the workpiece on both sides, making the overall force of the outer diameter grinding wheel 107 more uniform. This not only reduces the vibration effect of the outer diameter grinding wheel 107 itself, making the equipment run smoothly, but also grinds two workpieces at the same time, improving grinding efficiency. Moreover, every time the fixture 104 rotates, the abutment rod 1041 on the fixture 104 abuts against the baffle 306 once, causing the baffle 306 to move towards compressing the first compression spring 305, so that the second liquid pipe 205 is connected to the liquid chamber 302, and then the cutting fluid is sprayed out from the second liquid pipe 205 to cool the workpiece. This intermittent cooling method can prevent frictional heat from causing thermal damage to the workpiece surface, and at the same time prevent local overcooling of the workpiece from causing thermal stress cracks.

[0044] It should be noted that when the outer diameter grinding wheel 107 of this equipment grinds two workpieces simultaneously, different degrees of frictional wear will occur on both sides of the outer diameter grinding wheel 107. Ultimately, one workpiece will be in a grinding state while the other workpiece will be in a non-contact state. At this time, the presence of the two workpieces can no longer balance the function of the outer diameter grinding wheel 107. Therefore, it is necessary to monitor this situation in real time. In the prior art, torque sensors are often used to monitor the torque on the object. However, in this equipment, the fixture 104 is not only subjected to the frictional force of the outer diameter grinding wheel 107, but also to the driving force of the flexible shaft 106. Therefore, the fixture 104 is subjected to dual torque. Conventional torque sensors are difficult to specifically monitor the frictional torque on the fixture 104.

[0045] In some implementations of this solution, reference is made to Figure 4 As shown, a rotating sleeve 303 is rotatably mounted inside the mounting base 301. The rotating sleeve 303 is connected to the flexible shaft 106. The clamp 104 is rotatably mounted inside the rotating sleeve 303. A first torsion spring 304 is provided inside the rotating sleeve 303. One end of the first torsion spring 304 is connected to the rotating sleeve 303, and the other end of the first torsion spring 304 is connected to the clamp 104. Therefore, when the flexible shaft 106 drives the rotating sleeve 303 to rotate, the rotating sleeve 303 drives the clamp 104 to deflect through the first torsion spring 304. At this time, when the workpiece on the clamp 104 is subjected to the frictional force brought by grinding, the clamp 104 and the rotating sleeve 303 should rotate relative to each other. If there is no relative rotation, it means that the workpiece is not subjected to frictional force.

[0046] Furthermore, the rotating sleeve 303 has a through groove 311, and the abutment rod 1041 is slidably disposed in the through groove 311. When the workpiece is in a normal grinding state, the fixture 104 and the rotating sleeve 303 rotate relative to each other. At this time, the abutment rod 1041 on the fixture 104 slides along the through groove 311 until the abutment rod 1041 slides to one end of the through groove 311, so that the abutment rod 1041 abuts against the end of the through groove 311, thereby applying a stable reaction force to the abutment rod 1041 at the end of the through groove 311, which further drives the fixture 104 to rotate.

[0047] Additionally, see Figure 9 A pair of flat plates 401 are provided on the electric slide table 103. A rotating block 307 is installed on the flat plate 401. The rotating block 307 is fixedly connected to the mounting base 301. A second torsion spring 403 is provided in the lower flat plate 401. One end of the second torsion spring 403 is connected to the flat plate 401, and the other end of the second torsion spring 403 is connected to the rotating block 307.

[0048] Furthermore, a constant pressure through-slot 404 is formed within the upper plate 401, communicating with the outside. A flow channel 308 is formed within the rotating block 307, with a connecting groove 309 connected to the top of the flow channel 308. The connecting groove 309 communicates with the constant pressure through-slot 404. A push plate 310 is mounted on the rotating block 307, slidingly installed within the constant pressure through-slot 404. A sealing plate 406 is positioned at the top of the constant pressure through-slot 404, with a limit plate 407 at one end. A spring sheet 405 is installed on the side of the limit plate 407 to limit the push plate 310. Therefore, please refer to... Figure 8 The constant pressure through groove 404 on the left side of the push plate 310 is connected to the outside, and the constant pressure through groove 404 on the right side of the push plate 310 is connected to the flow channel 308.

[0049] Please refer to Figure 5 A slide groove 313 is provided in the liquid chamber 302, and a slide plate 314 is installed in the slide groove 313. A tension spring 315 is fixedly installed in the slide groove 313, and the other end of the tension spring 315 is connected to the slide plate 314. A first through hole 316 is provided on the slide plate 314, which communicates with the liquid chamber 302. A second through hole 317 is provided in the slide groove 313, which communicates with the flow channel 308. Under normal conditions, the slide plate 314 seals the second through hole 317. When the slide plate 314 moves towards the second through hole 317, the first through hole 316 will communicate with the second through hole 317, thereby connecting the liquid chamber 302 with the flow channel 308 and increasing the liquid pressure inside the flow channel 308. When the liquid pressure inside the flow channel 308 increases, the push plate 310 is pushed by the liquid pressure on the right side, causing the push plate 310 to drive the rotating block 307 to deflect.

[0050] Please refer to Figure 5The abutment rod 1041 is slidably inserted into the fixture 104. A second compression spring 1042 is provided inside the fixture 104. The other end of the second compression spring 1042 is connected to the abutment rod 1041. A guide block 1043 is installed on the side of the abutment rod 1041. A guide strip 312 for abutting against the guide block 1043 is provided on the inner wall of the through groove 311. When the workpiece is in normal grinding state, the abutment rod 1041 will slide towards the upper end of the through groove 311. During this process, the guide block 1043 and the guide strip 312 abut against each other, causing the abutment rod 1041 to move into the fixture 104 while sliding, resulting in a reduction in the length of the abutment rod 1041 extending out of the fixture 104.

[0051] Please refer to Figure 6 A lever 318 is hinged to the slide plate 314. A torsion spring 319 is provided at the end of the lever 318. One end of the torsion spring 319 is connected to the lever 318, and the other end of the torsion spring 319 is connected to the slide plate 314. When the grinding force on the workpiece decreases, the abutment rod 1041 abuts against the lever 318. If the workpiece is in a non-contact state, there is no relative rotation between the fixture 104 and the rotating sleeve 303. The abutment rod 1041 on the fixture 104 is fully extended. When the fixture 104 rotates with the rotating sleeve 303, the abutment rod 1041 will abut against the lever 318, causing the slide plate 314 to slide.

[0052] In addition, a bolt 402 is threaded onto the upper plate 401. One side of the bolt 402 is fixedly connected to the sealing plate 406. A pointer is provided on the sealing plate 406, and a scale corresponding to the pointer is provided on the plate 401.

[0053] In summary, the operating principle of this equipment is as follows: If the workpiece is in a non-grinding state, there is no relative rotation between the fixture 104 and the rotating sleeve 303. The abutment rod 1041 on the fixture 104 is fully extended. When the fixture 104 rotates with the rotating sleeve 303, the abutment rod 1041 will abut against the push plate 318, causing the slide plate 314 to slide. When the slide plate 314 moves towards the second through hole 317, the first through hole 316 will connect with the second through hole 317, thereby connecting the liquid chamber 302 with the flow channel 308, increasing the liquid pressure inside the flow channel 308. Since the constant pressure through groove 404 on the right side of the push plate 310 is connected to the flow channel 308, when the flow channel 308... When the internal liquid pressure increases, the push plate 310 is pushed by the liquid pressure on the right side, causing the push plate 310 to drive the rotating block 307 to deflect. The rotating block 307 further drives the mounting base 301 to deflect towards the outer diameter grinding wheel 107, so that the workpiece contacts the outer diameter grinding wheel 107, ensuring that the force on both sides of the outer diameter grinding wheel 107 is balanced.

[0054] If the workpiece is in a grinding state, the abutment rod 1041 will slide towards the upper end of the through groove 311. During this process, the guide block 1043 and the guide strip 312 abut against each other, causing the abutment rod 1041 to move into the fixture 104 while sliding. This results in a reduction in the length of the abutment rod 1041 extending out of the fixture 104. When the fixture 104 rotates with the rotating sleeve 303, the abutment rod 1041 will not abut against the lever plate 318.

[0055] It should be noted that the grinding of the workpiece includes rough grinding and fine grinding. In this equipment, the outer diameter grinding wheel 107 is used for preliminary rough grinding of the workpiece. Please refer to [reference needed]. Figure 9 , Figure 10 When the push plate 310 moves, it will break through the spring plate 405. At the same time, the spring plate 405 is limited by the limiting plate 407 and is not easy to deflect in the opposite direction. Therefore, the spring plate 405 can limit the push plate 310 after deflection. When the push plate 310 needs to be reset, the bolt 402 can be turned to unscrew the bolt 402. The bolt 402 will drive the spring plate 405 to move upward, thereby releasing the limitation on the push plate 310 and allowing the push plate 310 to be reset smoothly. In addition, when the bolt 402 is screwed in, it will position the spring plate 405 in the constant pressure groove 404, thereby limiting the push plate 310 to different positions and presetting the deflection angle of the push plate 310, thereby achieving controllable workpiece deflection angle and ensuring the rough grinding accuracy of the workpiece.

[0056] In some implementations of this solution, reference is made to Figure 11 As shown, the base 101 is also provided with a flat grinding wheel 108 for grinding the end face of the workpiece. The flat grinding wheel 108 is driven by a drive motor. When the equipment is in use, the flat grinding wheel 108 is used to rough grind the end face of the workpiece, and the outer diameter grinding wheel 107 is used to rough grind the conical surface of the workpiece. This allows the equipment to perform multi-directional grinding on the workpiece, increasing the applicability of the equipment.

[0057] The preferred embodiments of this solution have been described in detail above with reference to the accompanying drawings. However, this solution is not limited to the specific details in the above embodiments. Within the scope of the technical concept of this solution, various simple modifications can be made to the technical solution, and these simple modifications all fall within the protection scope of this solution.

[0058] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this solution will not describe the various possible combinations separately.

[0059] Furthermore, various implementations of this solution can be combined in any way, as long as they do not violate the spirit of this solution, they should also be regarded as the content disclosed in this solution.

Claims

1. A four-spindle CNC combined grinding machine, comprising a base (101), wherein an outer diameter grinding wheel (107) and an electric slide (103) are disposed on the base (101), a clamp (104) and a motor (105) are disposed on the electric slide (103), a flexible shaft (106) is connected to the output shaft of the motor (105), and the other end of the flexible shaft (106) is connected to the clamp (104), characterized in that: The clamps (104) are provided in pairs, and the pair of clamps (104) are respectively located on both sides of the outer diameter grinding wheel (107). The electric slide (103) is provided with a mounting base (301). The clamps (104) are installed in the mounting base (301). A liquid chamber (302) is provided in the mounting base (301). A first liquid pipe (204) and a second liquid pipe (205) are provided on the outside of the mounting base (301). The first liquid pipe (204) and the second liquid pipe (205) are respectively connected to the liquid chamber (302). A liquid pump (201) is provided on the base (101), and the outlet end of the liquid pump (201) is connected to the liquid chamber (302) pipe. The liquid chamber (302) is provided with a baffle (306) for sealing the second liquid tube (205). A first compression spring (305) is installed in the liquid chamber (302). The other end of the first compression spring (305) is connected to the baffle (306). The edges of the baffle (306) are rounded. An abutment rod (1041) is installed on the clamp (104). The abutment rod (1041) abuts against the baffle (306) intermittently. A rotating sleeve (303) is installed inside the mounting base (301). The rotating sleeve (303) is connected to the flexible shaft (106). The clamp (104) is rotatably installed in the rotating sleeve (303). A first torsion spring (304) is provided inside the rotating sleeve (303). One end of the first torsion spring (304) is connected to the rotating sleeve (303), and the other end of the first torsion spring (304) is connected to the clamp (104). The rotating sleeve (303) has a through groove (311), and the abutting rod (1041) is slidably disposed in the through groove (311); A pair of flat plates (401) are provided on the electric slide (103). A rotating block (307) is installed on the flat plate (401). The rotating block (307) is fixedly connected to the mounting base (301). A second torsion spring (403) is provided in the lower flat plate (401). One end of the second torsion spring (403) is connected to the flat plate (401), and the other end of the second torsion spring (403) is connected to the rotating block (307).

2. The four-spindle CNC combined grinding machine according to claim 1, characterized in that: A constant pressure through groove (404) is provided in the upper plate (401), and the constant pressure through groove (404) is connected to the outside. A flow channel (308) is provided in the rotating block (307), and a connecting groove (309) is connected to the top of the flow channel (308). The connecting groove (309) is connected to the constant pressure through groove (404). A push plate (310) is provided on the rotating block (307), and the push plate (310) is slidably installed in the constant pressure through groove (404). The constant pressure through groove (404) is provided with a sealing plate (406) at the top, and a limiting plate (407) is provided at one end of the sealing plate (406). A spring sheet (405) for limiting the push plate (310) is installed on the side of the limiting plate (407).

3. A four-spindle CNC combined grinding machine according to claim 2, characterized in that: The liquid cavity (302) is provided with a groove (313), and a slide plate (314) is installed in the groove (313). A tension spring (315) is provided in the slide plate (314), and the other end of the tension spring (315) is connected to the slide plate (314). A first through hole (316) is opened on the slide plate (314), and the first through hole (316) is connected to the liquid cavity (302). A second through hole (317) is opened in the groove (313), and the second through hole (317) is connected to the flow channel (308).

4. A four-spindle CNC combined grinding machine according to claim 3, characterized in that: The abutment rod (1041) is slidably inserted into the clamp (104). A second compression spring (1042) is provided inside the clamp (104). The other end of the second compression spring (1042) is connected to the abutment rod (1041). A guide block (1043) is installed on the side of the abutment rod (1041). A guide strip (312) for abutting against the guide block (1043) is provided on the inner wall of the through groove (311).

5. A four-spindle CNC combined grinding machine according to claim 4, characterized in that: A lever (318) is hinged to the slide plate (314). A third torsion spring (319) is provided at the end of the lever (318). One end of the third torsion spring (319) is connected to the lever (318), and the other end of the third torsion spring (319) is connected to the slide plate (314). When the grinding force on the workpiece decreases, the abutment rod (1041) abuts against the lever plate (318).

6. A four-spindle CNC combined grinding machine according to claim 5, characterized in that: A bolt (402) is threaded onto the upper plate (401), one side of which is fixedly connected to the sealing plate (406). A pointer is provided on the sealing plate (406), and a scale corresponding to the pointer is provided on the plate (401).

7. A four-spindle CNC combined grinding machine according to claim 6, characterized in that: The base (101) is also provided with a flat grinding wheel (108) for grinding the end face of the workpiece.

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