Horizontal machining center

Abstract

This invention discloses a horizontal machining center, belonging to the field of mechanical processing. It includes a bed, a tool magazine fixed within the bed, a slide and a multi-axis moving platform movably connected inside the bed, a worktable fixed to the upper end of the slide, and a spindle box fixed to the multi-axis moving platform. The tool magazine contains a tool holder repair unit, which includes a sleeve fixed inside the tool magazine and a rotating ring rotatably connected to one side of the sleeve. When a tool-changing robot pulls out the tool to be replaced from the spindle and inserts it into the sleeve, a puller grips the tool holder. As the puller rotates, causing the tool to rotate inside the sleeve, a sanding roller in the housing grinds the outer surface of the tool holder, removing minor burrs or unevenness, resulting in a smoother and more even outer surface. This improves the connection between the tool holder and the spindle hole, enhancing the fit between the tool and the spindle and increasing machining accuracy.

Description

Technical Field

[0001] This invention relates to the field of machining, and more specifically, to a horizontal machining center. Background Technology

[0002] A horizontal machining center is a type of equipment used for precision machining of parts on multiple working surfaces. It is a multi-functional and highly efficient CNC machine.

[0003] Both vertical and horizontal machining centers are equipped with tool magazines. A tool changer in the tool magazine allows for the automatic replacement of tools on the spindle by swapping the positions of the tools in the magazine with those on the spindle. The tool consists of a tool holder (the part connecting the spindle and the tool, responsible for transmitting the spindle's rotational power to the tool and ensuring its stability during machining. The tool holder needs to be matched with the spindle interface to ensure accurate and reliable transmission) and end mills (also called inserts, which directly participate in cutting and shaping operations on the workpiece. Different types of end mills can be selected according to different machining requirements, such as face cutters, ball end mills, and helical end mills).

[0004] During tool changing, the used tool needs to be removed from the spindle, and then an unused tool taken from the tool magazine is inserted into the spindle. When frequently changing tools for different machining operations, friction will occur at the contact point between the tool holder and the spindle each time the tool is removed or inserted. This friction will cause mechanical wear, resulting in a certain degree of wear on the surface of the tool holder. The wear will gradually change the contact surface between the tool holder and the spindle, affecting its concentricity (whether the cutting amount of each cutting edge is uniform when the tool rotates one revolution) and dynamic balance (whether the tool is stable when the spindle rotates), thus affecting the machining quality. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of this invention is to provide a horizontal machining center.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A horizontal machining center includes a bed, a tool magazine fixedly connected to the bed, a slide and a multi-axis moving platform movably connected to the bed, a worktable fixedly connected to the upper end of the slide, and a spindle box fixedly connected to the multi-axis moving platform. The tool magazine is connected to a tool holder repair unit, which includes a sleeve fixedly connected to the tool magazine, a rotating ring rotatably connected to one side of the sleeve, a broach and a repair assembly movably connected to the sleeve, and a groove formed inside the sleeve.

[0008] The repair assembly includes a swashplate sleeved on the outer surface of the puller claw, two movable seats symmetrically slidably connected in the slide groove, a fixed post fixed to one side of the two movable seats, a connecting rod fixed to the other side of the two movable seats, a guide rod fixed to the inner wall of the slide groove with one end inserted inside the connecting rod, a cover fixed to the outer surface of the connecting rod, a sanding roller connected inside the cover, and a spring movably sleeved outside the guide rod.

[0009] Furthermore, the outer surface of the connecting rod is connected to a rotary reciprocating motion unit, which includes a hollow sleeve fitted around the outside of the guide rod and rotatably connected to the connecting rod on one side, a guide block integrally formed on the inner wall of the hollow sleeve, a connector fixedly fitted around the outer surface of the guide rod, a connecting rod rotatably connected inside the connector, a gear one fixedly connected to one end of the connecting rod, a key opened on the outer surface of the hollow sleeve and meshing with the gear one, and a sliding sleeve movably fitted around the outside of the guide rod. The other end of the connecting rod passes through the cover and is fixedly connected to one end of the sand roller. The two ends of the spring are respectively connected to one side of the sliding sleeve and the inner wall of the sliding groove. The outer surface of the guide rod is provided with a guide groove that matches the guide block.

[0010] Furthermore, the inside of the cover is connected to a roller surface cleaning unit, which includes two brush rollers symmetrically rotatably connected inside the cover, two gears four symmetrically rotatably connected inside the cover and fixed to one side of the two brush rollers respectively, two gears three symmetrically rotatably connected inside the cover and meshing with the two gears four respectively, and a gear two located inside the cover and fixedly sleeved on the outer surface of the connecting rod, wherein the gear two meshes with the gear three.

[0011] Furthermore, the cover described above also has an installation groove inside, and a spray assembly is snapped into the installation groove, with the spray head of the spray assembly facing one of the brush rollers.

[0012] Furthermore, a ball bearing 1 is rotatably connected to the side of the fixed column adjacent to the swash plate, a plurality of ball bearing 2 are rotatably connected to the side of the sliding sleeve adjacent to the hollow sleeve, and a brush is fixedly attached to the inner wall of the sleeve.

[0013] Furthermore, a guide rod is fixedly connected to the inner wall of the chute, and a movable groove matching the guide rod is opened inside the movable seat. A through groove is opened inside the sleeve, and the through groove is used to pass through a pipe and connect to the spray assembly.

[0014] Furthermore, the sleeve is also equipped with an electroplating unit, which includes an anode electroplating end fixed to one side of the outer surface of the cover, an electroplating pen fixed to one side of the outer surface of the anode electroplating end, and a liquid outlet assembly snapped into the inside of the cover. The outer surface of the sleeve is also fixed with a power source, and the positive and negative terminals of the power source are connected to the electroplating pen and the rotating ring, respectively.

[0015] Furthermore, a hollowed-out insert plate is snapped onto one side of the outer surface of the anode brush plating end, and an anode support is fixed to the inner wall of the insert plate. A cotton storage cavity is opened inside the anode support, and the cotton storage cavity is filled with degreased cotton.

[0016] Furthermore, the insert plate also has a limiting groove inside, and a limiting frame is engaged in the limiting groove. The inner wall of the limiting groove is provided with anti-slip texture to prevent the limiting frame from moving.

[0017] Furthermore, a clearance groove is provided on the outer surface of the sleeve, and one end of the brush pen extends outward through the clearance groove.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] (1) This solution is equipped with a tool holder repair unit. When the tool changing robot pulls out the tool to be replaced from the spindle and sends it into the sleeve, the puller grips the tool holder. When the puller rotates and drives the tool to rotate inside the sleeve, the sanding roller in the cover grinds the outer surface of the tool holder, polishing the small burrs or uneven parts on the outer surface of the tool holder, making the outer surface of the tool holder smoother and flatter. This makes the connection between the tool holder and the spindle hole tighter and more stable, which not only improves the fit between the tool and the spindle, but also improves the machining accuracy.

[0020] (2) This solution is equipped with a swash plate, a fixed column, a connecting rod and a guide rod. During the rotation of the pull pawl, the swash plate will rotate, thereby pushing the connecting rod to move in translation outside the guide rod, which will drive the sanding roller to move in translation and reciprocate. By moving the sanding roller, it is possible to avoid over-grinding a certain position on the outer surface of the tool handle, making the grinding of the entire tool handle surface more uniform. At the same time, it can also prevent the sanding roller from staying in one place for too long, which will cause deep scratches or grooves on the surface of the tool handle. It can also help to disperse the heat generated by grinding friction.

[0021] (3) This solution provides a guide groove on the outer surface of the guide rod, and guide blocks and key teeth are provided inside and outside the hollow sleeve respectively. When the connecting rod moves in translation outside the guide rod, the hollow sleeve will rotate, driving the gear 1, connecting rod and sand roller to rotate. The sand roller will also rotate while it is moving in translation. The rotation of the sand roller can make the abrasive grains contact the outer surface of the tool holder at different angular velocities and directions, thereby improving the cutting effect. At the same time, it can also ensure that every part of the outer surface of the sand roller can contact the outer surface of the tool holder, avoiding excessive local wear of the sand roller. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the tool holder repair unit structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the repair component structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the guide block, key, connector, and connecting rod of the present invention.

[0026] Figure 5 This is a schematic diagram of the guide groove and sliding sleeve structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the sand roller and brush roller structure of the present invention;

[0028] Figure 7 This is a cross-sectional view of the cover body of the present invention;

[0029] Figure 8 This is a schematic diagram of the anode brush plating end, the plug-in card plate, and the cotton storage cavity structure of the present invention.

[0030] Figure 9 This is a schematic diagram of the limiting groove and anode support structure of the present invention.

[0031] Explanation of the labels in the diagram:

[0032] 1. Bed; 2. Slide; 3. Worktable; 4. Multi-axis moving platform; 5. Spindle box; 51. Spindle; 6. Tool magazine; 61. Tool changing robot; 7. Tool holder repair unit; 71. Sleeve; 72. Rotating ring; 73. Pulling claw; 74. Slide groove; 75. Repair assembly; 751. Swashplate; 752. Movable seat; 753. Fixed column; 754. Ball bearing; 755. Connecting rod; 756. Cover; 757. Sanding roller; 758. Guide rod; 76. Brush; 77. Rotary reciprocating motion unit; 771. Spring; 772. Slide sleeve; 773. Guide groove; 774. Hollow sleeve; 775, gear key; 776, guide block; 777, gear one; 778, connector; 779, connecting rod; 78, roller surface cleaning unit; 781, spray assembly; 782, gear two; 783, gear three; 784, brush roller; 785, gear four; 79, electroplating unit; 791, power supply; 792, brush plating pen; 793, anode brush plating end; 794, liquid outlet assembly; 795, plug-in card plate; 796, cotton storage cavity; 797, limiting frame; 798, limiting groove; 799, anode support; 8, through groove; 9, clearance groove; 10, guide rod. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1 to 9 A horizontal machining center includes a bed 1, a tool magazine 6 fixedly connected to the bed 1, a slide 2 and a multi-axis moving platform 4 movably connected inside the bed 1, a worktable 3 fixedly connected to the upper end of the slide 2, and a spindle box 5 fixedly connected to the multi-axis moving platform 4. The tool magazine 6 is internally connected to a tool holder repair unit 7. The tool holder repair unit 7 includes a sleeve 71 fixedly connected inside the tool magazine 6, a rotating ring 72 rotatably connected to one side of the sleeve 71, a broach 73 movably connected inside the sleeve 71 (the broach is usually a component for holding broaches and also a component for holding workpieces), a repair assembly 75, a groove 74 opened inside the sleeve 71, and an output unit (a power unit composed of a motor, reducer, coupling and other parts, used to drive the broach 73 to rotate) installed inside the tool magazine 6 and connected to the broach 73.

[0035] The repair assembly 75 includes a swashplate 751 sleeved on the outer surface of the puller claw 73, two movable seats 752 symmetrically slidably connected in the slide groove 74, a fixed post 753 fixed to one side of the two movable seats 752, a connecting rod 755 fixed to the other side of the two movable seats 752, a guide rod 758 fixed to the inner wall of the slide groove 74 with one end inserted inside the connecting rod 755, a cover 756 fixed to the outer surface of the connecting rod 755, a sanding roller 757 connected inside the cover 756, and a spring 771 movably sleeved outside the guide rod 758. A ball bearing 754 is rotatably connected to the side of the fixed post 753 adjacent to the swashplate 751. A guide rod 10 is fixed to the inner wall of the slide groove 74, and the movable seats 752 have movable grooves that match the guide rod 10.

[0036] By adopting the above technical solution, the tool changing method and structure of the tool magazine 6 are mature existing technologies, which will not be elaborated here. The tool changing robot 61 on the tool magazine 6 first clamps the tools in the tool magazine 6 and the tools in the spindle 51 in the spindle box 5. Then it extends forward to pull out the tools in the spindle 51. The tool changing robot 61 rotates to align the two tools with the tool holder repair unit 7 and then retracts to insert the tool holder into the sleeve 71. After insertion into the sleeve 71, the pull claw 73 clamps the pull rod on the tool holder. The power unit drives the pull claw 73 to rotate, thereby driving the tool holder to rotate in the sleeve 71. The sanding roller 757 in the cover 756 contacts the outer surface of the tool holder to grind the small burrs or unevenness on the outer surface of the tool holder. The outer surface of the tool holder after grinding is smoother and flatter. In this way, the connection between the tool holder and the spindle hole can be tighter and more stable, improving the fit between the tool and the spindle 51. To improve machining accuracy, while the broaching jaw 73 rotates, it can also drive the swashplate 751 to rotate. The rotation of the swashplate 751 can push the fixed column 753 to move in translation, thereby pushing the two symmetrically arranged movable seats 752 to move in translation along the guide rod 10 in the slide groove 74. The translation of the movable seats 752 drives the connecting rod 755 and the sanding roller 757 to also move in translation. The movement of the sanding roller 757 can avoid over-grinding a certain position on the outer surface of the tool holder, making the grinding of the entire tool holder surface more uniform. At the same time, it can also prevent the sanding roller 757 from staying in one place for too long, which would cause deep scratches or grooves on the surface of the tool holder. It can also help to dissipate the heat generated by grinding friction. The function of the spring 771 is to push the connecting rod 755 and the fixed column 753 to move and reset, so that the ball 754 at one end of the fixed column 753 can contact one side of the swashplate 751.

[0037] like Figure 3 - Figure 5 As shown, the outer surface of the connecting rod 755 is connected to a rotary reciprocating motion unit 77, which includes a hollow sleeve 774 sleeved on the outside of the guide rod 758 and rotatably connected to the connecting rod 755 on one side, a guide block 776 integrally formed on the inner wall of the hollow sleeve 774, a connector 778 fixedly sleeved on the outer surface of the guide rod 758, a connecting rod 779 rotatably connected inside the connector 778, a gear 777 fixedly connected to one end of the connecting rod 779, a key 775 formed on the outer surface of the hollow sleeve 774 and meshing with the gear 777, and a sliding sleeve 772 movably sleeved on the outside of the guide rod 758. The other end of the connecting rod 779 passes through the cover 756 and is fixedly connected to one end of the sand roller 757. The two ends of the spring 771 are respectively connected to one side of the sliding sleeve 772 and the inner wall of the sliding groove 74. The outer surface of the guide rod 758 is provided with a guide groove 773 that matches the guide block 776. The sliding sleeve 772 and the hollow sleeve 774 are rotatably connected to a plurality of ball bearings on the adjacent side.

[0038] By adopting the above technical solution, when the connecting rod 755 moves along the guide rod 758, the guide block 776 slides inside the guide groove 773. The guide groove 773 is spirally opened on the outer wall of the guide rod 758. When the guide block 776 slides along the guide groove 773, it will rotate, thereby driving the hollow sleeve 774 to rotate. The rotation of the hollow sleeve 774 drives the gear 777 and the connecting rod 779 to rotate. The rotation of the connecting rod 779 drives the sanding roller 757 to rotate. In this way, the sanding roller 757 can also rotate inside the cover 756 during the translation process. The rotation of the sanding roller 757 can make the abrasive grains contact the outer surface of the tool holder at different angular velocities and directions, improving the cutting effect. At the same time, it can also ensure that every part of the outer surface of the sanding roller 757 can contact the outer surface of the tool holder, avoiding excessive local wear of the sanding roller 757.

[0039] like Figure 6 and Figure 7 As shown, a roller surface cleaning unit 78 is connected inside the cover 756. The roller surface cleaning unit 78 includes two brush rollers 784 symmetrically rotatably connected inside the cover 756, two gears 785 symmetrically rotatably connected inside the cover 756 and fixed to one side of each of the two brush rollers 784, two gears 783 symmetrically rotatably connected inside the cover 756 and meshing with each of the two gears 785, and a gear 782 located inside the cover 756 and fixedly sleeved on the outer surface of the connecting rod 755. The gears 782 mesh with the gears 783. A brush 76 is fixedly connected to the inner wall of the sleeve 71.

[0040] By adopting the above technical solution, when the connecting rod 779 drives the sanding roller 757 to rotate, it will also drive the gear 2 782 to rotate. The rotation of the gear 2 782 will drive the gear 4 785 to rotate through the gear 3 783. The rotation of the gear 4 785 will drive the brush roller 784 to rotate. The rotation of the brush roller 784 can clean the outer surface of the tool holder and remove the impurities adhering to the outer surface of the tool holder. On the other hand, the rotation of the brush roller 784 can also clean the outer surface of the sanding roller 757, which helps to maintain the sharpness of the abrasive grains on the sanding roller 757, thereby improving grinding efficiency. Keeping the surface of the sanding roller 757 clean also helps to dissipate heat and reduce the accumulation of grinding heat.

[0041] like Figure 7 As shown, the cover 756 above also has an installation groove inside, and a spray assembly 781 is snapped into the installation groove. The spray head of the spray assembly 781 faces one of the brush rollers 784. The sleeve 71 has a through groove 8 inside, and the through groove 8 is used to pass a pipe through and connect to the spray assembly 781.

[0042] By adopting the above technical solution, the pipeline is connected to an external pump body, which pumps the coolant to the spray assembly 781. The spray assembly 781 sprays out the coolant, which can wash and clean the outer surface of the tool holder, the outer surface of the sanding roller 757 and the brush roller 784, and also cool the sanding roller 757 and the grinding area of ​​the tool holder.

[0043] like Figure 2 and Figure 8 As shown, the sleeve 71 is further provided with an electroplating unit 79, which includes an anode electroplating end 793 fixed to one side of the outer surface of the cover 756, an electroplating pen 792 fixed to one side of the outer surface of the anode electroplating end 793, and a liquid outlet assembly 794 snapped into the inside of the cover 756. A power supply 791 is also fixed to the outer surface of the sleeve 71, and the positive and negative terminals of the power supply 791 are connected to the electroplating pen 792 and the rotating ring 72, respectively. A clearance groove 9 is formed on the outer surface of the sleeve 71, and one end of the electroplating pen extends outward through the clearance groove 9.

[0044] By adopting the above technical solution, when the tool holder is inserted into the sleeve 71, the outer surface of the tool holder can contact the anode brush plating end 793. The liquid outlet assembly 794 is connected to a pump body through a pipe, and the pump body pumps the electrolyte into the liquid outlet assembly 794. The electrolyte is discharged from the liquid outlet assembly 794 and flows to the outer surface of the tool holder and the anode brush plating end 793. The negative terminal of the power supply 791 is connected to the rotating ring 72, and one side of the tool holder is in contact with one side of the rotating ring 72. In this way, the negative terminal of the power supply 791 can be connected to the tool holder. The anode brush plating end 793, which is filled with solution, is wiped on the surface of the tool holder, and the metal ions in the solution react with the anode brush plating end on the surface of the tool holder. Discharge crystallization occurs at each point of contact with phase 793, and gradually thickens over time. Due to the relative motion speed between the workpiece and the anode brush-plating end 793, the crystallization process is discontinuous for each point on the coating. A layer of metal is plated on the damaged part of the tool holder through electrochemical reaction. This metal layer is firmly bonded to the substrate. This method can repair the wear on the outer surface of the tool holder (suitable for wear less than 0.2mm), increase the wear resistance and corrosion resistance of the outer surface of the tool holder, extend the service life of the tool holder, and at the same time ensure the stability and accuracy of the connection between the tool holder and the spindle 51.

[0045] like Figure 9 As shown, a hollowed-out insert plate 795 is snapped onto one side of the outer surface of the anode brush plating end 793, and an anode support 799 is fixed to the inner wall of the insert plate 795. The anode support 799 has a cotton storage cavity 796 inside, which is filled with degreased cotton. A limiting groove 798 is also formed inside the insert plate 795, and a limiting frame 797 is snapped into the limiting groove 798. The inner wall of the limiting groove 798 has anti-slip textures to prevent the limiting frame 797 from moving.

[0046] By adopting the above technical solution, it is clear that the outer surface of the anode cannot be directly used for brush plating without being wrapped with an appropriate material. The purpose of wrapping the anode is to store the plating solution and prevent the anode from directly contacting the workpiece and short-circuiting, thus avoiding burning the workpiece. Therefore, cotton is often used to wrap the outer surface of the anode, and then a polyester cotton sleeve is used to wrap the cotton. In this application, a plug-in card 795 is snapped onto the anode brush plating end 793. The plug-in card 795 is made of a non-conductive insulating material, while the anode support 799 inside is made of a conductive material. The cotton is placed inside the cotton storage cavity 796, and then the cotton sleeve is wrapped around the side of the plug-in card 795 that contacts the tool holder. The wrapping method is to remove the limiting frame 797 from the limiting groove 798, and then place the cut cotton sleeve on one side of the plug-in card 795. When the cotton sleeve is inserted into the limiting groove 798, the limiting bracket 797 can also insert the cotton sleeve into the limiting groove 798, thereby realizing the installation of the cotton sleeve. Compared with the method of "cotton wrapped on the outer surface of the anode and then wrapped with polyester cotton sleeve", this installation method has the following advantages: the insertion card 795 can be quickly removed from the anode brush plating end 793, and the cotton storage cavity 796 separates the large pieces of cotton. This way, it is not necessary to replace the whole piece of cotton, but only to replace the unclean cotton in part of the cotton storage cavity 796, which reduces the processing cost. It also allows the polyester cotton sleeve to be quickly removed from the anode brush plating end 793 and replaced.

[0047] Operating Instructions: The tool changing robot 61 on the tool magazine 6 inserts the tool handle into the sleeve 71. After insertion, the pull claw 73 clamps the pull rod on the tool handle. The power unit drives the pull claw 73 to rotate, thereby causing the tool handle to rotate within the sleeve 71. The sanding roller 757 in the cover 756 contacts the outer surface of the tool handle to polish minor burrs or uneven areas. When the pull claw 73 rotates, it drives the swashplate 751 to rotate. The rotation of the swashplate 751 pushes the two movable seats 752 and the sanding rollers 757 inside the two covers 756 to move in a translational motion. The movement of the sanding rollers 757 can prevent over-polishing of a certain position on the outer surface of the tool handle. When the connecting rod 755 moves in translational motion along the guide rod 758, the guide block 776 slides inside the guide groove 773. The sliding of the guide block 776 drives the hollow sleeve... 774 rotates, thereby driving gear 777, connecting rod 779, and abrasive roller 757 to rotate. The rotation of abrasive roller 757 enables abrasive grains to contact the outer surface of the tool holder at different angular velocities and directions. When abrasive roller 757 rotates, it drives gear 2 782 to rotate. The rotation of gear 2 782 drives gear 4 785 to rotate through gear 3 783. The rotation of gear 4 785 drives brush roller 784 to rotate, cleaning the outer surface of the tool holder and abrasive roller 757. Electrolyte is discharged from liquid outlet assembly 794 and flows to the outer surface of the tool holder and anode brush plating end 793. Anode brush plating end 793 wipes the surface of the tool holder. Metal ions in the solution discharge and crystallize at various points on the surface of the tool holder that come into contact with anode brush plating end 793, plating a layer of metal on the damaged parts of the tool holder, increasing the wear resistance and corrosion resistance of the outer surface of the tool holder.

[0048] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A horizontal machining center, comprising a bed (1), a tool magazine (6) fixed in the bed (1), a slide (2) movably connected inside the bed (1) and a multi-axis moving platform (4), a worktable (3) fixed on the upper end of the slide (2), and a spindle box (5) fixed on the multi-axis moving platform (4), characterized in that: The tool magazine (6) is connected to a tool holder repair unit (7). The tool holder repair unit (7) includes a sleeve (71) fixed inside the tool magazine (6), a rotating ring (72) rotatably connected to one side of the sleeve (71), a puller claw (73) movably connected inside the sleeve (71), a repair component (75), and a groove (74) opened inside the sleeve (71). The repair assembly (75) includes a swashplate (751) sleeved on the outer surface of the puller claw (73), two movable seats (752) symmetrically slidably connected in the slide groove (74), a fixed post (753) fixed on one side of the two movable seats (752), a connecting rod (755) fixed on the other side of the two movable seats (752), a guide rod (758) fixed on the inner wall of the slide groove (74) and one end inserted into the connecting rod (755), a cover (756) fixed on the outer surface of the connecting rod (755), a sanding roller (757) connected inside the cover (756), and a spring (771) movably sleeved on the outside of the guide rod (758). The outer surface of the connecting rod (755) is connected to a rotary reciprocating motion unit (77), and the rotary reciprocating motion unit (77) includes a hollow sleeve (774) sleeved on the outside of the guide rod (758) and rotatably connected to the connecting rod (755) on one side, a guide block (776) integrally formed on the inner wall of the hollow sleeve (774), a connector (778) fixedly sleeved on the outer surface of the guide rod (758), a connecting rod (779) rotatably connected inside the connector (778), and a gear fixed to one end of the connecting rod (779). 777), a key (775) is opened on the outer surface of the hollow sleeve (774) and meshes with the gear (777), a sliding sleeve (772) is movably sleeved on the outside of the guide rod (758), the other end of the connecting rod (779) passes through the cover (756) and is fixedly connected to one end of the sand roller (757), the two ends of the spring (771) are respectively connected to one side of the sliding sleeve (772) and the inner wall of the slide groove (74), and a guide groove (773) matching the guide block (776) is opened on the outer surface of the guide rod (758). The cover (756) is connected to a roller surface cleaning unit (78), and the roller surface cleaning unit (78) includes two brush rollers (784) symmetrically rotatably connected inside the cover (756), two gears four (785) symmetrically rotatably connected inside the cover (756) and fixed to one side of the two brush rollers (784) respectively, two gears three (783) symmetrically rotatably connected inside the cover (756) and meshing with the two gears four (785) respectively, and a gear two (782) located inside the cover (756) and fixedly sleeved on the outer surface of the connecting rod (779), wherein the gear two (782) meshes with the gear three (783); The fixed column (753) is rotatably connected to the side adjacent to the swash plate (751) with a ball bearing (754), the sliding sleeve (772) is rotatably connected to the side adjacent to the hollow sleeve (774) with a plurality of balls bearings (76), and a brush (76) is fixedly attached to the inner wall of the sleeve (71).

2. A horizontal machining center according to claim 1, characterized in that: The cover (756) described above is also provided with an installation groove, and a spray assembly (781) is snapped into the installation groove. The spray head of the spray assembly (781) faces one of the brush rollers (784).

3. A horizontal machining center according to claim 2, characterized in that: A guide rod (10) is fixedly connected to the inner wall of the slide (74). The movable seat (752) has a movable groove that matches the guide rod (10). The sleeve (71) has a through groove (8) inside, and the through groove (8) is used to pass through a pipe and connect to the spray assembly (781).

4. A horizontal machining center according to claim 1, characterized in that: The sleeve (71) is also provided with an electroplating unit (79), and the electroplating unit (79) includes an anode electroplating end (793) fixed to one side of the outer surface of the cover (756), an electroplating pen (792) fixed to one side of the outer surface of the anode electroplating end (793), and a liquid outlet assembly (794) snapped into the inside of the cover (756). The outer surface of the sleeve (71) is also fixed with a power supply (791), and the positive and negative terminals of the power supply (791) are connected to the electroplating pen (792) and the rotating ring (72) respectively.

5. A horizontal machining center according to claim 4, characterized in that: The outer surface of the anode brush plating end (793) is fitted with an internally hollowed-out plug-in plate (795), and an anode support (799) is fixed on the inner wall of the plug-in plate (795). The anode support (799) has a cotton storage cavity (796) inside, and the cotton storage cavity (796) is filled with degreased cotton.

6. A horizontal machining center according to claim 5, characterized in that: The insert plate (795) also has a limiting groove (798) inside, and a limiting frame (797) is engaged in the limiting groove (798). The inner wall of the limiting groove (798) is provided with anti-slip texture to prevent the limiting frame (797) from moving.

7. A horizontal machining center according to claim 6, characterized in that: The outer surface of the sleeve (71) is provided with a relief groove (9), and one end of the brush pen extends outward through the relief groove (9).

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