An automatic center positioning fixture for linear rail grinding

Abstract

The present invention discloses an automatic center positioning fixture for a linear rail grinder. The present invention relates to the field of positioning fixture technology, comprising a large slide base, an electric suction cup installed on the top of the large slide base, a linear rail blank magnetically installed on the top of the electric suction cup, a column installed on the middle of the side of the large slide base, a horizontal grinding slide installed on the back of the column for driving the linear rail fixture to move up and down, and a horizontal grinding wheel installed on the back of the horizontal grinding slide for grinding the plane of the linear rail blank. The automatic center positioning fixture for a linear rail grinder completes the clamping method for positioning the linear rail blank by synchronously moving the auxiliary wheel and the needle bearing to the middle position, so that the positioning fixture can cope with linear rail blanks of different widths, so that no matter how much the width of the linear rail blank is, after the linear rail fixture clamps the linear rail blank, the reference surface is always the center position of the guide rail, and the center of the linear rail will not be offset, effectively ensuring the processing accuracy and processing efficiency of the linear rail blank.

Description

Technical Field

[0001] The invention relates to the technical field of positioning fixtures, in particular to an automatic center positioning fixture for a linear rail grinder. Background Art

[0002] The linear rail automatic positioning fixture currently used in linear rail grinding generally has a conventional structure in which one side is fixed and the other side is movable. The specific process is that the linear rail is placed on the electric suction cup. When calibrating the linear rail, the horizontal grinding slide moves downward, and the two sides of the linear rail are clamped by the fixture fixed on the slide, and then the linear rail is calibrated. By clamping the linear rail in this way, the purpose of calibrating the linear rail is achieved. However, this structure may have disadvantages in some cases. For example, during use, if the fixture of the above structure is used, when the width of the linear rail blank is inconsistent, this straightening method will cause the center of the linear rail to be offset, thereby affecting the processing accuracy and efficiency of the linear rail. Summary of the Invention

[0003] To achieve the above objectives, the present invention is implemented through the following technical solutions: an automatic center positioning fixture for a linear rail grinder, comprising a large slide base, an electric suction cup is installed on the top of the large slide base, a linear rail blank is magnetically mounted on the top of the electric suction cup, a column is installed in the middle of the side of the large slide base, a horizontal grinding slide is installed on the back of the column, which is used to drive the linear rail fixture to move up and down, and a horizontal grinding wheel is installed on the back of the horizontal grinding slide for grinding the flat surface of the linear rail blank;

[0004] It also includes a linear rail fixture, which is installed on the front side of the horizontal grinding slide and corresponds to the horizontal grinding wheel. The linear rail fixture includes a large plate seat installed on the front side of the horizontal grinding slide by bolts, and a cylinder is assembled on the side of the large plate seat away from the horizontal grinding slide. A small slide seat is installed on the side of the large plate seat away from the horizontal grinding slide. The large plate seat is installed with an inner slide rail on the side facing the horizontal grinding slide and the side away from the horizontal grinding slide. The small slide seat is slidably installed with the large plate seat through the inner slide rail.

[0005] A correction assembly is installed at the corner position of the large plate seat, and an auxiliary roller assembly is installed on the side of the large plate seat facing the horizontal grinding slide seat. The auxiliary roller assembly is slidably installed with the large plate seat through an inner slide rail, and the auxiliary roller assembly and the correction assembly are installed together on the same side of the large plate seat;

[0006] The auxiliary roller assembly is installed with an auxiliary seat assembly via bolts on the side away from the large plate seat, and the large plate seat is installed with a guide end plate via bolts on the side away from the horizontal grinding slide seat;

[0007] The large plate seat is provided with circular base grooves side by side near the middle of the side of the correction assembly, and a cylindrical seat is installed on the inner side of the circular base groove through a bolt flange, and a small bearing is provided on the outer surface of the cylindrical seat, and a hobbing is installed on the outer surface of the small bearing, and the hobbing is rotatably installed with the cylindrical seat through the small bearing, and the hobbing is installed between the correction assembly and the auxiliary roller assembly; the cylindrical seat flange can be installed on the inner side of the circular base groove to increase the contact area between the cylindrical seat and the large plate seat installation part, thereby ensuring the stability of the needle roller bearing when it moves horizontally on the side of the large plate seat;

[0008] The small sliding seat includes a seat plate, which is assembled on the inner slide rail by bolts. The seat plate is slidably installed with the large plate seat through the inner slide rail. A push-on plate is installed on the side of the seat plate close to the cylinder by bolts. The telescopic end of the cylinder is assembled with the push-on plate by a nut. The cylinder is assembled with the seat plate through the push-on plate.

[0009] The auxiliary roller assembly includes a base plate seat, which is slidably installed with the large plate seat through an inner slide rail. A second rack is installed on the top outer side of the base plate seat through bolts, and a second seat block is installed on the right end of the top outer side of the base plate seat through bolts.

[0010] Preferably, a first rack is installed on the bottom side bolts of the pedestal plate, and the first rack is installed on the side close to the correction assembly. A first seat block is installed on the bottom of the pedestal plate and on the side close to the correction assembly. A needle bearing is rotatably installed on the middle of a side of the first seat block away from the pedestal plate.

[0011] Preferably, the correction assembly includes a pump suction box, and a right-angle seat is installed at one end of the pump suction box facing the large plate seat through bolts. The pump suction box is assembled with the large plate seat through the right-angle seat, and a folded angle plate is fixedly connected to the middle of one end of the pump suction box away from the large plate seat, and a duct plate is fixedly connected between the middle of the edge of the folded angle plate away from the pump suction box and the pump suction box, and a right-angle frame is formed between the folded angle plate and the duct plate. Through this triangular stable structure, the structural installation strength between the large cover body and the pump suction box is enhanced.

[0012] Preferably, a suction pipe is installed on the inner side of one end of the conduit plate away from the angle plate, and a large cover is fixedly connected to the free end of the angle plate away from the pump suction box, and the large cover is fitted with a needle bearing.

[0013] Preferably, a heating roller is rotatably mounted on the middle part of the upper side of the large cover body, a DD motor is fixedly mounted on the lower side of the large cover body, a running roller is rotatably mounted on the output end of the DD motor, and a notch is provided at the position where the running roller and the large cover body are engaged, and the running roller is fitted with the bottom of the outer surface of the needle bearing through the notch, and the running roller can be driven to rotate clockwise around the output shaft by starting the DD motor, thereby driving the needle bearing to rotate clockwise inside the large cover body.

[0014] Preferably, a groove is provided on the inner side wall of the large cover body, and pressing plates are symmetrically connected to the lower edge of the groove. The free end of the suction guide tube passes through the large cover body and extends into the inner side of the groove, and is pressed onto the inner wall of the groove through the pressing plate. The free end of the suction guide tube fits with the inner wall of the groove, and by starting the pump suction box, the debris accumulated on the inner side of the groove can be collected through the suction guide tube and stored separately inside the pump suction box.

[0015] Preferably, two auxiliary wheels are installed in parallel on the middle part of the second seat block by bolts, and the auxiliary wheels are rotatably installed with the second seat block. The horizontal line of the center of the needle bearing coincides with the axis of symmetry between the two auxiliary wheels. The linear rail blank is straightened by the horizontal grinding wheel through the cooperation of the needle bearing and the two auxiliary wheels; the hobbing is engaged with the first rack and the second rack at the same time.

[0016] Preferably, the auxiliary seat assembly includes a square seat frame installed on the second seat block by bolts, and the square seat frame is integrally connected to a double hoop body at one end close to the auxiliary wheel, and a needle roller rod and a hoop are installed on the two semicircular curved walls of the double hoop body, and the hoop is fixedly connected to the curved wall of the double hoop body, and the needle roller rod is rotatably installed with the double hoop body through the hoop, and the auxiliary wheel is rotatably installed with the square seat frame through the cooperation of the needle roller rod and the double hoop body.

[0017] Preferably, an oblique support plate is fixedly connected to the two semicircular curved walls of the double hoop body, and the oblique support plate is installed in the gap between the two needle rollers, and the top of the oblique support plate is connected to an arc scraper, and the upper edge of the arc scraper is fitted with the outer surface of the auxiliary wheel, and the top of the arc scraper can fit and scratch the surface of the auxiliary wheel, and can scrape off the debris attached to the outer surface of the auxiliary wheel in time, and the end of the arc scraper away from the oblique support plate passes through the double hoop body and extends into the inner side of the square base frame, and an arc guide cavity is opened between the arc scraper and the double hoop body, which can guide the scraped debris into the inner side of the magnetic roller in time for storage.

[0018] Preferably, two magnetic rollers are installed on one side of the square seat frame away from the second seat block, and a magnetic rod is installed in the middle of the inner side of the magnetic roller to attract debris. A double-ear slot is opened on one side of the outer surface of the magnetic roller, and the double-ear slot is connected to the arc-shaped guide cavity, and blocking ears are symmetrically installed on both sides of the double-ear slot, which are semi-cylindrical and can prevent the debris collected inside the magnetic roller from flowing back or leaking out, thereby preventing the debris from leaking and clogging the arc-shaped guide cavity.

[0019] The present invention provides an automatic center positioning fixture for a linear rail grinder, which has the following beneficial effects:

[0020] 1. The automatic center positioning fixture of the linear rail grinding, when the cylinder pushes the first rack and needle bearing of the upper layer, drives the second rack of the lower layer to move synchronously through the hobbing fixed between the two racks, so that the two auxiliary wheels rotatably mounted on the second seat block move toward the center, thereby achieving the purpose of simultaneously moving the fixture toward the center to clamp the linear rail, and then activate the large slide base to cooperate with the horizontal grinding wheel and the linear rail fixture to straighten the linear rail blank. The above-mentioned auxiliary wheel and needle bearing move synchronously to the middle position to complete the clamping method of positioning the linear rail blank, so that the positioning fixture can cope with linear rail blanks of different widths, so that no matter how much the width of the linear rail blank is, after the linear rail fixture clamps the linear rail blank, the reference surface is always the center position of the guide rail.

[0021] 2. The automatic center positioning fixture of the linear rail grinding machine drives the needle roller bearing to return to the inside of the large cover when the cylinder needle roller bearing retracts. By observing whether the needle roller bearing can return to the inside of the large cover smoothly and whether a harsh scraping sound is generated during the return, the operator can automatically detect whether the positioning accuracy of the needle roller bearing has changed. The positioning accuracy of the needle roller bearing can be automatically detected and calibrated. By returning the needle roller bearing to the inside of the large cover, the correct position of the needle roller bearing can be corrected and adjusted, ensuring that the needle roller bearing accurately aligns and guides the next linear rail blank.

[0022] 3. The automatic center positioning fixture for the linear rail grinding machine, through the limited cooperation of the needle roller rod and the double hoop body, can ensure that the relative position of the auxiliary wheels will not change when the auxiliary wheels and needle roller bearings jointly position and straighten the linear rail blank. The two auxiliary wheels will not be tilted or offset to the other side due to excessive pressure from the needle roller bearings on the linear rail blank. The positioning and clamping accuracy of the two auxiliary wheels on the linear rail blank is guaranteed not to be affected by excessive pressure from the needle roller bearings, so that the two auxiliary wheels can always maintain straight positioning and guidance of the linear rail blank.

[0023] Fourth, the automatic center positioning fixture for the linear rail grinding can scrape off the debris protruding from the outer surface of the auxiliary wheel with the help of the arc scraper when the auxiliary wheel rotates inside the double hoop body. In addition, the auxiliary wheel can also use the active rotation of the auxiliary wheel relative to the arc scraper to achieve real-time scraping of the debris on the outer surface of the auxiliary wheel during the process of positioning and straightening the linear rail blank by the needle bearing and the auxiliary wheel. The metal debris generated when aligning the linear rail blank can be effectively transferred from the linear rail blank to the auxiliary wheel in a timely manner, and then the arc scraper can be used to transfer the debris to the magnetic roller in a timely manner, thereby avoiding the interference of debris on the positioning and straightening processes during the alignment of the linear rail blank.

[0024] 5. The linear rail grinding automatic center positioning fixture has the function of automatically scraping off debris through the correction assembly and the auxiliary seat assembly, so that the linear rail blank will not be disturbed by debris during the positioning and clamping or the straightening process. This straightening method will not cause the center of the linear rail to deviate, effectively ensuring the processing accuracy and efficiency of the linear rail blank. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the external structure of an automatic center positioning fixture for a linear rail grinder according to the present invention;

[0026] Figure 2 Schematic diagram of the structure of the linear rail clamp of the present invention;

[0027] Figure 3 Schematic diagram of the disassembled structure of the linear rail clamp of the present invention;

[0028] Figure 4 This is a schematic diagram of the disassembled structure of the auxiliary roller assembly and the large plate seat of the present invention;

[0029] Figure 5 This is a schematic diagram of the disassembled structure of the gear hobbing and the large plate seat of the present invention;

[0030] Figure 6 This is a schematic structural diagram of the correction assembly of the present invention;

[0031] Figure 7 This is a schematic structural diagram of the large cover body of the present invention;

[0032] Figure 8 It is a structural schematic diagram of the auxiliary seat assembly of the present invention;

[0033] Figure 9 It is a structural schematic diagram of the arc scraper and magnetic roller of the present invention.

[0034] In the figure: 1. Large slide base; 2. Electric suction cup; 3. Linear rail blank; 4. Column; 5. Horizontal grinding slide; 6. Horizontal grinding wheel; 7. Linear rail fixture; 71. Large plate seat; 72. Cylinder; 73. Small slide seat; 74. Correction assembly; 75. Auxiliary roller assembly; 76. Auxiliary seat assembly; 77. Guide end plate; 78. Inner slide rail; 79. Gear hobbing; 710. Cylindrical seat; 711. Small bearing; 731. Seat plate; 732. Push plate; 733. First rack; 734. First seat block; 735. Needle roller bearing; 7 51. Bottom plate seat; 752. Second rack; 753. Second seat block; 754. Auxiliary wheel; 741. Pump suction box; 742. Angle plate; 743. Conduit plate; 744. Suction pipe; 745. Large cover body; 746. Heating roller; 747. DD motor; 748. Walking roller; 749. Groove; 7410. Pressing sheet; 761. Square seat frame; 762. Double hoop body; 763. Needle roller; 764. Hoop; 765. Oblique support plate; 766. Arc scraper; 767. Magnetic roller; 768. Double ear slit. Implementation Method

[0035] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described to better illustrate the principles of the invention and its practical application, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for specific applications.

[0036] The first embodiment, as Figures 1 to 9 As shown, the present invention provides a technical solution: an automatic center positioning fixture for a linear rail grinder, comprising a large slide base 1, an electric suction cup 2 is installed on the top of the large slide base 1, a linear rail blank 3 is magnetically installed on the top of the electric suction cup 2, a column 4 is installed in the middle of the side of the large slide base 1, a horizontal grinding slide 5 is installed on the back of the column 4, and a horizontal grinding wheel 6 is installed on the back of the horizontal grinding slide 5;

[0037] It also includes a linear rail fixture 7, which is installed on the front side of the horizontal grinding slide 5 and corresponds to the horizontal grinding wheel 6. The linear rail fixture 7 includes a large plate seat 71 installed on the front side of the horizontal grinding slide 5 by bolts. The large plate seat 71 is assembled with a cylinder 72 on the side facing away from the horizontal grinding slide 5. A small slide seat 73 is installed on the side of the large plate seat 71 facing away from the horizontal grinding slide 5. The large plate seat 71 is installed with an inner slide rail 78 on both the side facing the horizontal grinding slide 5 and the side facing away from the horizontal grinding slide 5. The small slide seat 73 is slidably installed with the large plate seat 71 through the inner slide rail 78.

[0038] A correction assembly 74 is installed at the corner of the large plate seat 71. An auxiliary roller assembly 75 is installed on the side of the large plate seat 71 facing the horizontal grinding slide 5. The auxiliary roller assembly 75 is slidably installed with the large plate seat 71 through an inner slide rail 78, and the auxiliary roller assembly 75 and the correction assembly 74 are installed together on the same side of the large plate seat 71.

[0039] The auxiliary roller assembly 75 is mounted with an auxiliary seat assembly 76 on the side facing away from the large plate seat 71 by means of bolts, and the large plate seat 71 is mounted with a guide end plate 77 on the side facing away from the horizontal grinding slide seat 5 by means of bolts;

[0040] The large plate seat 71 is provided with a circular base groove in the middle of the side near the correction assembly 74. A cylindrical seat 710 is installed on the inner side of the circular base groove through a bolt flange. A small bearing 711 is provided on the outer surface of the cylindrical seat 710. A gear hob 79 is installed on the outer surface of the small bearing 711. The gear hob 79 is rotatably installed with the cylindrical seat 710 through the small bearing 711. The gear hob 79 is installed between the correction assembly 74 and the auxiliary roller assembly 75. The cylindrical seat 710 flange is installed on the inner side of the circular base groove to increase the rotation of the cylindrical seat 710. The contact area between the large cylindrical seat 710 and the mounting portion of the large plate seat 71 is increased to make the installation between the gear hobbing 79 and the large plate seat 71 tighter and more secure. When the gear hobbing 79 is engaged with the first rack 733 and the second rack 752 for transmission, the gear hobbing 79 is prevented from being partially offset or shaken, ensuring the stability of the needle bearing 735 when it moves horizontally on the side of the large plate seat 71, and providing the most basic guarantee for smooth transmission when the needle bearing 735 and the auxiliary wheel 754 jointly calibrate the linear rail blank 3.

[0041] When in use, first move the horizontal grinding wheel 6 toward the column 4 to clear the position of the linear rail clamp 7, start the cylinder 72 to retract, so that the needle roller bearing 735 is in a loose state, then install the linear rail blank 3 on the electric suction cup 2, turn on the electric suction cup 2 to enable the light magnetic attraction state, then control the horizontal grinding slide 5 to move downward, so that the linear rail clamp 7 moves downward together, so that the needle roller bearing 735 reaches the position of the linear rail blank 3, start the cylinder 72 to make a push-out action, and under the transmission condition that the hobbing gear 79 is simultaneously engaged with the first rack 733 and the second rack 752, the two auxiliary wheels 7 54 and the needle bearing 735 move synchronously to the middle position and clamp the linear rail blank 3. After the auxiliary wheel 754 and the needle bearing 735 clamp the two sides of the linear rail blank 3 together, the position correction begins: the large slide base 1 is activated to correct the position of the entire linear rail blank 3. During the correction process, the electric suction cup 2 continuously increases the magnetic force to ensure that the corrected position is accurate and firmly fixed. After the linear rail blank 3 is accurately corrected, the needle bearing 735 is released, and the horizontal grinding slide 5 moves up to complete the correction action. By repeating the above actions, the correction of the second linear rail blank 3 can be completed.

[0042] When the upper first rack 733 and needle bearing 735 are pushed by the cylinder 72, the lower second rack 752 is driven to move synchronously through the hobbing gear 79 fixed between the two racks, so that the two auxiliary wheels 754 rotatably mounted on the second seat block 753 move toward the center, thereby achieving the purpose of the clamp moving toward the center at the same time to clamp the linear rail, and then the large slide base 1 is activated to cooperate with the horizontal grinding wheel 6 and the linear rail clamp 7 to straighten the linear rail blank 3. The above-mentioned auxiliary wheel 754 and needle bearing 735 move synchronously to the middle position to complete the clamping method for positioning the linear rail blank 3, so that the positioning clamp can cope with linear rail blanks 3 of different widths, so that no matter how much the width of the linear rail blank 3 is, after the linear rail clamp 7 clamps the linear rail blank 3, the reference surface is always the center position of the guide rail.

[0043] The second embodiment, based on the first embodiment, see Figures 3 to 7 As shown, the small sliding seat 73 includes a seat plate 731, which is assembled on the inner slide rail 78 by bolts. The seat plate 731 is slidably installed with the large plate seat 71 through the inner slide rail 78. The side of the seat plate 731 close to the cylinder 72 is installed with a push plate 732 by bolts. The telescopic end of the cylinder 72 is assembled with the push plate 732 by a nut, and the cylinder 72 is installed in combination with the seat plate 731 through the push plate 732; the auxiliary roller assembly 75 includes a base plate seat 751, which is slidably installed with the large plate seat 71 through the inner slide rail 78, and the second rack 752 is installed with bolts on the top outer side of the base plate seat 751, and the second seat block 753 is installed with bolts on the right end of the top outer side of the base plate seat 751.

[0044] The bottom side of the pedestal plate 731 is bolted with a first rack 733, and the first rack 733 is installed on the side close to the correction assembly 74. The bottom of the pedestal plate 731 and the side close to the correction assembly 74 are installed with a first seat block 734. The middle part of the first seat block 734 away from the pedestal plate 731 is rotatably installed with a needle bearing 735; the correction assembly 74 includes a pump suction box 741, and the end of the pump suction box 741 facing the large plate seat 71 is bolted with The right-angle seat, the pump suction box 741 is assembled with the large plate seat 71 through the right-angle seat, and the middle part of the end of the pump suction box 741 away from the large plate seat 71 is fixedly connected with a corner plate 742, and the middle part of the edge of the corner plate 742 away from the pump suction box 741 and the pump suction box 741 are fixedly connected with a duct plate 743, and a right-angle frame is formed between the corner plate 742 and the duct plate 743. Through this triangular stable structure, the structural installation strength between the large cover body 745 and the pump suction box 741 is strengthened.

[0045] A suction pipe 744 is installed on the inner side of the end of the duct plate 743 away from the angle plate 742, and a large cover body 745 is fixedly connected to the free end of the angle plate 742 away from the pump suction box 741, and the large cover body 745 is fitted with a needle bearing 735; a heating roller 746 is rotatably installed in the middle of the upper side of the large cover body 745, and a DD motor 747 is fixedly installed on the lower side of the large cover body 745, and a walking roller 748 is rotatably installed on the output end of the DD motor 747, and a notch is provided at the position where the walking roller 748 and the large cover body 745 are engaged. The walking roller 748 fits with the bottom of the outer surface of the needle bearing 735 through the notch, and can drive the walking roller 748 to rotate clockwise around the output shaft by starting the DD motor 747, thereby driving the needle bearing 735 to rotate clockwise inside the large cover body 745.

[0046] A groove 749 is provided on the inner wall of the large cover 745, and pressing pieces 7410 are symmetrically connected on both sides of the lower edge of the groove 749. The free end of the suction pipe 744 passes through the large cover 745 and extends into the inner side of the groove 749. It is pressed on the inner wall of the groove 749 by the pressing piece 7410. The free end of the suction pipe 744 fits with the inner wall of the groove 749. By starting the pump suction box 741, the debris accumulated on the inner side of the groove 749 can be collected into the pump suction box through the suction pipe 744. 741 is stored separately on the inside; two auxiliary wheels 754 are installed in parallel on the middle of the second seat block 753 by bolts, and the auxiliary wheels 754 are rotatably installed with the second seat block 753. The horizontal line of the center of the needle bearing 735 coincides with the symmetry axis between the two auxiliary wheels 754. The linear rail blank 3 is straightened by the horizontal grinding wheel 6 through the cooperation of the needle bearing 735 and the two auxiliary wheels 754; the hobbing 79 is engaged with the first rack 733 and the second rack 752 at the same time.

[0047] When in use, the needle roller bearing 735 can be returned to the inner side of the large cover body 745 through the needle roller bearing 735, and the outer surface of the needle roller bearing 735 is fitted with the inner wall of the large cover body 745. The upper edge of the groove 749 is used to scrape off excess debris attached to the outer surface of the needle roller bearing 735, so that the debris is collected on the inner side of the groove 749, and the debris is transferred to the inner side of the pump suction box 741 in time by the suction pipe 744, avoiding the secondary attachment of debris to the outer surface of the needle roller bearing 735, ensuring that the outer surface of the needle roller bearing 735 is clean and tidy, thereby ensuring that the needle roller bearing 735 and the auxiliary wheel 754 can jointly accurately align the linear rail blank 3, effectively avoiding the interference of debris on the alignment processing accuracy, and at the same time, timely dispose of the debris attached to the surface of the needle roller bearing 735, so as to prepare for the next alignment processing of another set of linear rail blanks 3.

[0048] When the needle roller bearing 735 retracts through the cylinder 72, it drives the needle roller bearing 735 to return to the inside of the large cover body 745. By observing whether the needle roller bearing 735 can return to the inside of the large cover body 745 smoothly and whether a harsh scraping sound is generated during the return, the operator can automatically detect whether the positioning accuracy of the needle roller bearing 735 has changed. The positioning accuracy of the needle roller bearing 735 can be automatically detected and calibrated. By returning the needle roller bearing 735 to the inside of the large cover body 745, the correct position of the needle roller bearing 735 can be corrected and adjusted, ensuring that the needle roller bearing 735 accurately aligns and guides the next linear rail blank 3.

[0049] The third embodiment, based on the first and second embodiments, see Figure 8 and Figure 9 As shown, the auxiliary seat assembly 76 includes a square seat frame 761 installed on the second seat block 753 by bolts, and the square seat frame 761 is integrally connected to a double hoop body 762 at one end close to the auxiliary wheel 754. A needle rod 763 and a hoop ring 764 are installed on the two semicircular curved walls of the double hoop body 762. The hoop ring 764 is fixedly connected to the curved wall of the double hoop body 762. The needle rod 763 is rotatably installed with the double hoop body 762 through the hoop ring 764, and the auxiliary wheel 754 is rotatably installed with the square seat frame 761 through the needle rod 763 and the double hoop body 762.

[0050] The two semicircular curved walls of the double hoop body 762 are fixedly connected with an oblique support plate 765, and the oblique support plate 765 is installed in the gap between the two needle rollers 763. The top of the oblique support plate 765 is connected with an arc scraper 766. The upper edge of the arc scraper 766 is fitted with the outer surface of the auxiliary wheel 754. The top of the arc scraper 766 can fit with the surface of the auxiliary wheel 754 and scrape off the debris attached to the outer surface of the auxiliary wheel 754 in time. The end of the arc scraper 766 away from the oblique support plate 765 passes through the double hoop body 762 and extends into the inner side of the square base frame 761. The arc scraper 766 and the double hoop body 762 are connected. An arc-shaped guide cavity is provided between them, which can guide the scraped debris into the inner side of the magnetic roller 767 in time and store it; a magnetic roller 767 is inserted on the side of the square base frame 761 away from the second base block 753, and a magnetic rod is installed in the middle of the inner side of the magnetic roller 767 to attract the debris, and a double ear slot 768 is provided on one side of the outer surface of the magnetic roller 767, and the double ear slot 768 is connected to the arc-shaped guide cavity, and blocking ears are symmetrically installed on both sides of the double ear slot 768, which are semi-cylindrical and are used to prevent the debris collected inside the magnetic roller 767 from flowing back or leaking out, so as to prevent the debris from leaking and clogging the arc-shaped guide cavity.

[0051] When in use, the auxiliary wheel 754 is always mounted on the inner sides of the two semicircular curved walls of the double hoop body 762. The needle roller rod 763 is used to enable the auxiliary wheel 754 to rotate relative to the double hoop body 762. Through the limited cooperation of the needle roller rod 763 and the double hoop body 762, it can be ensured that when the auxiliary wheel 754 and the needle roller bearing 735 jointly position and straighten the linear rail blank 3, the relative position of the auxiliary wheel 754 will not change, and the two auxiliary wheels 754 will not be tilted or offset to the other side due to excessive pressure from the needle roller bearing 735 on the linear rail blank 3. The accuracy of the positioning and clamping of the linear rail blank 3 by the two auxiliary wheels 754 can be guaranteed not to be affected by excessive pressure from the needle roller bearing 735, so that the two auxiliary wheels 754 can always maintain the straight positioning and guidance of the linear rail blank 3.

[0052] Secondly, when the auxiliary wheel 754 rotates inside the double hoop body 762, the arc scraper 766 can be used to scrape off the debris protruding from the outer surface of the auxiliary wheel 754. In addition, in the process of the needle bearing 735 and the auxiliary wheel 754 jointly positioning and straightening the linear rail blank 3, the active rotation movement of the auxiliary wheel 754 relative to the arc scraper 766 can be used to realize real-time scraping of the debris on the outer surface of the auxiliary wheel 754. The metal debris generated when calibrating the linear rail blank 3 can be effectively transferred from the linear rail blank 3 to the auxiliary wheel 754 in time, and then the arc scraper 766 can be used to transfer the debris to the magnetic roller 767 in time, so as to avoid the interference of debris on the positioning and straightening processes during the process of calibrating the linear rail blank 3.

[0053] In addition, the correction assembly 74 and the auxiliary seat assembly 76 both have the functional structure of automatically scraping off debris, so that the linear rail blank 3 will not be disturbed by debris whether it is being positioned and clamped or in the straightening process. This straightening method will not cause the center of the linear rail to deviate, effectively ensuring the processing accuracy and efficiency of the linear rail blank 3.

[0054] Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A linear rail grinding automatic center positioning fixture, comprising a large slide base (1), characterized in that: An electric suction cup (2) is installed on the top of the large slide base (1), a linear rail blank (3) is magnetically installed on the top of the electric suction cup (2), a column (4) is installed in the middle of the side of the large slide base (1), a horizontal grinding slide (5) is installed on the back of the column (4), and a horizontal grinding wheel (6) is installed on the back of the horizontal grinding slide (5); It also includes a linear rail fixture (7), which is installed on the front of the horizontal grinding slide (5) and corresponds to the horizontal grinding wheel (6), the linear rail fixture (7) includes a large plate seat (71) installed on the front of the horizontal grinding slide (5) by bolts, the large plate seat (71) is assembled with a cylinder (72) on the side facing away from the horizontal grinding slide (5), the large plate seat (71) is installed with a small slide seat (73) on the side facing away from the horizontal grinding slide (5), the large plate seat (71) is installed with an inner slide rail (78) on the side facing the horizontal grinding slide (5) and the side facing away from the horizontal grinding slide (5), and the small slide seat (73) is slidably installed with the large plate seat (71) through the inner slide rail (78); A correction assembly (74) is installed at a corner position of the large plate seat (71), and an auxiliary roller assembly (75) is installed on the side of the large plate seat (71) facing the horizontal grinding slide seat (5). The auxiliary roller assembly (75) is slidably installed with the large plate seat (71) through an inner slide rail (78), and the auxiliary roller assembly (75) and the correction assembly (74) are installed together on the same side of the large plate seat (71); The auxiliary roller assembly (75) is mounted with an auxiliary seat assembly (76) via bolts on a side facing away from the large plate seat (71), and the large plate seat (71) is mounted with a guide end plate (77) via bolts on a side facing away from the horizontal grinding slide seat (5); The large plate seat (71) is provided with circular base grooves in parallel in the middle of the side near the correction assembly (74), and a cylindrical seat (710) is installed on the inner side of the circular base groove via a bolt flange. A small bearing (711) is sleeved on the outer surface of the cylindrical seat (710), and a gear hob (79) is installed on the outer surface of the small bearing (711). The gear hob (79) is rotatably installed with the cylindrical seat (710) via the small bearing (711), and the gear hob (79) is installed between the correction assembly (74) and the auxiliary roller assembly (75); The small sliding seat (73) includes a seat plate (731), the seat plate (731) is assembled on the inner slide rail (78) by bolts, the seat plate (731) is slidably installed with the large plate seat (71) through the inner slide rail (78), a push plate (732) is installed on the side of the seat plate (731) close to the cylinder (72) by bolts, the telescopic end of the cylinder (72) is assembled with the push plate (732) by a nut, and the cylinder (72) is assembled with the seat plate (731) by the push plate (732); The auxiliary roller assembly (75) includes a base plate seat (751), the base plate seat (751) is slidably mounted with the large plate seat (71) via an inner slide rail (78), a second rack (752) is mounted on the top outer side of the base plate seat (751) via bolts, and a second seat block (753) is mounted on the right end of the top outer side of the base plate seat (751) via bolts; A first rack (733) is bolted to the bottom side of the pedestal plate (731), and the first rack (733) is installed on a side close to the correction assembly (74). A first seat block (734) is installed at the bottom of the pedestal plate (731) and on a side close to the correction assembly (74). A needle bearing (735) is rotatably installed in the middle of a side of the first seat block (734) away from the pedestal plate (731). The correction assembly (74) includes a pump suction box (741), one end of the pump suction box (741) facing the large plate seat (71) is installed with a right-angle seat by means of bolts, the pump suction box (741) is assembled with the large plate seat (71) through the right-angle seat, the middle part of one end of the pump suction box (741) away from the large plate seat (71) is fixedly connected with a folded angle plate (742), the middle part of the edge of the folded angle plate (742) away from the pump suction box (741) is fixedly connected with a conduit plate (743) between the pump suction box (741), and a right-angle frame is formed between the folded angle plate (742) and the conduit plate (743); A suction guide tube (744) is installed on the inner side of one end of the conduit plate (743) away from the angled plate (742); a large cover (745) is fixedly connected to the free end of the angled plate (742) away from the pump suction box (741); the large cover (745) is fitted with the needle roller bearing (735); A heating roller (746) is rotatably mounted on the middle portion of the upper side of the large cover (745), a DD motor (747) is fixedly mounted on the lower side of the large cover (745), a running roller (748) is rotatably mounted on the output end of the DD motor (747), and a notch is provided at the portion where the running roller (748) and the large cover (745) are engaged, and the running roller (748) is in contact with the bottom of the outer surface of the needle bearing (735) through the notch; A groove (749) is provided on the inner side wall of the large cover body (745), and pressing pieces (7410) are symmetrically connected to the lower edges of the groove (749). The free end of the suction guide tube (744) passes through the large cover body (745) and extends into the inner side of the groove (749), and is pressed onto the inner wall of the groove (749) through the pressing piece (7410). The free end of the suction guide tube (744) fits in contact with the inner wall of the groove (749).

2. The automatic center positioning fixture for a linear rail grinder according to claim 1, characterized in that: Two auxiliary wheels (754) are installed in parallel in the middle of the second seat block (753) by bolts. The auxiliary wheels (754) are rotatably installed with the second seat block (753). The horizontal line of the center of the needle bearing (735) coincides with the symmetry axis between the two auxiliary wheels (754). The hobbing gear (79) is engaged with the first rack (733) and the second rack (752) at the same time.

3. The automatic centering fixture for a linear rail grinder according to claim 2, characterized in that: The auxiliary seat assembly (76) includes a square seat frame (761) mounted on the second seat block (753) by bolts, and a double hoop body (762) is integrally connected to one end of the square seat frame (761) close to the auxiliary wheel (754). A needle rod (763) and a hoop ring (764) are mounted on both semicircular curved walls of the double hoop body (762), and the hoop ring (764) is fixedly connected to the curved wall of the double hoop body (762). The needle rod (763) is rotatably mounted on the double hoop body (762) through the hoop ring (764), and the auxiliary wheel (754) is rotatably mounted on the square seat frame (761) through the needle rod (763) and the double hoop body (762).

4. The automatic centering fixture for a linear rail grinder according to claim 3, characterized in that: An oblique support plate (765) is fixedly connected to the two semicircular curved walls of the double hoop body (762), and the oblique support plate (765) is installed in the gap between the two needle rollers (763). The top of the oblique support plate (765) is connected to an arc scraper (766), and the upper edge of the arc scraper (766) is arranged to fit the outer surface of the auxiliary wheel (754). The end of the arc scraper (766) away from the oblique support plate (765) passes through the double hoop body (762) and extends into the inner side of the square base frame (761). An arc guide cavity is opened between the arc scraper (766) and the double hoop body (762).

5. The automatic centering fixture for a linear rail grinder according to claim 4, characterized in that: A magnetic roller (767) is inserted into the side of the square seat frame (761) away from the second seat block (753), a magnetic rod is installed in the middle of the inner side of the magnetic roller (767), and a double ear slot (768) is opened on one side of the outer surface of the magnetic roller (767), the double ear slot (768) is connected to the arc-shaped guide cavity, and blocking ears are symmetrically installed on both sides of the double ear slot (768), forming a semi-cylindrical shape.

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