Guide rail straightness measuring tool

Abstract

The application discloses a guide rail straightness measurement tool, which comprises an L-shaped base, a movable placing seat and a fixing assembly, wherein the L-shaped base is divided into a horizontal part and a vertical part according to the structure, and a horizontal base piece and a vertical base piece are arranged in the horizontal part and the vertical part; the movable placing seat is arranged on the horizontal part and is arranged in parallel sliding mode relative to the horizontal base piece; and the fixing assembly is arranged on the vertical part. The guide rail straightness measurement tool is characterized in that the horizontal part and the vertical part of the L-shaped base are respectively provided with the horizontal base piece and the vertical base piece, the straight reference surface of the horizontal part and the horizontal base piece is parallel to the machine tool guide rail through the vertical part, the table seat of the measurement dial gauge is arranged in the second mounting groove to abut against the straight reference surface, the tool is only needed to be installed on the sliding block through the fixing assembly, and then the measurement dial gauge is installed on the tool to perform straightness measurement, a ruler and a fixing clamp are not needed to be additionally used, the operation process is simplified, the measurement error caused by multiple fixations is reduced, and the detection efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of machine tool measuring equipment technology, and more specifically to a guide rail straightness measuring fixture. Background Technology

[0002] Guide rails are one of the most important moving parts of a machine tool. They ensure that moving parts can move accurately along a predetermined direction under the action of external forces (the weight of the moving parts themselves, the weight of the workpiece, cutting forces, and traction forces, etc.). Therefore, guide rails are crucial for ensuring the motion accuracy of the worktable. Among the various quality indicators of guide rails, guiding accuracy is the primary indicator. Guiding accuracy refers to the straightness of linear motion guide rails and the true roundness of circular motion guide rails when the moving guide rail moves along the supporting guide rail, as well as the accuracy of the relative positions between the guide rail and other moving parts. The main factors affecting guiding accuracy include: the geometric accuracy of the guide rail, the contact accuracy of the guide rail, the structural form of the guide rail, the structural rigidity and thermal deformation of the guide rail and base components, etc. Among these factors, the straightness accuracy of the guide rail plays a crucial role. The straightness of the guide rail has a significant impact on the machining accuracy of the machine tool; therefore, accuracy measurements must be performed after the machine tool leaves the factory and after repair to achieve the required accuracy.

[0003] Existing machine tools often have two guide rails. When measuring the straightness of these guide rails, the straightedge and dial indicator method is commonly used. Specifically, a straightedge is placed against the side of the guide rail and adjusted to be parallel to it, ensuring the dial indicator readings are equal at both ends of the straightedge. Then, the dial indicator is moved longitudinally along the guide rail, taking a reading every 200mm and recording it. The maximum algebraic difference in the dial indicator readings along the entire length of the guide rail is the straightness error of the guide rail.

[0004] In the aforementioned existing technologies, a straightedge is used as a linear reference surface after being parallel to the guide rail to be measured. An additional straightedge is used for contact measurement. After setting up the dial indicator and dial gauge, the straightedge needs to be fixed to prevent it from moving and causing errors. Moreover, the operation is complicated and not convenient to use. Summary of the Invention

[0005] The purpose of this invention is to provide a guide rail straightness measuring fixture to solve the problems of the need for additional fixing of the straightedge to avoid errors caused by its movement when measuring straightness using the straightedge pull dial method, as well as the complexity of operation and the inconvenience of use.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a guide rail straightness measuring fixture, comprising:

[0007] The L-shaped base is divided into a horizontal part and a vertical part according to its structure. A horizontal base member and a vertical base member are installed in parallel in the horizontal part and the vertical part respectively, and the horizontal base member and the vertical base member are locked vertically.

[0008] The movable placement seat is located on the horizontal part and is slidably disposed parallel to the horizontal base, and the movable placement seat is provided with a second mounting groove that penetrates the straight reference surface facing the horizontal base.

[0009] A fixing component for securing the L-shaped base to the slider.

[0010] Preferably, the system also includes a locking component, wherein a columnar connecting portion provided on the transverse base extends through the connecting hole of the vertical base and protrudes outwards, and a locking assembly is provided inside the vertical base. The locking assembly includes a sliding seat and a locking member disposed thereon. The locking component is threadedly connected to the columnar connecting portion, which drives the sliding seat to slide so that the locking member is embedded in a locking groove opened on the columnar connecting portion.

[0011] Preferably, it also includes an airbag component, which is disposed within the vertical base so that its end is located in front of the connecting hole in the default state. A conical transition portion is provided between the columnar connecting portion and the horizontal base. The airbag component is slidably squeezed by the sliding seat, and its end expands to abut against and lock the transition portion.

[0012] Preferably, a secondary vertical auxiliary component is also included, which has a mating groove. The secondary vertical auxiliary component is vertically arranged on the side of the horizontal part near the end so that the mating groove fits onto the horizontal base.

[0013] Preferably, the distance from the side of the mating groove to the upper end of the secondary vertical auxiliary component is a, the distance between the straight reference plane and the axis of the columnar connecting part is b, and the distance from the axis of the connecting hole of the vertical base to the upper end of the vertical base is c, where: a+b=c.

[0014] Preferably, the fixing assembly includes a magnetic component, a contact seat, and a copper layer. A contact portion is provided on the vertical base. The contact portion, copper layer, and contact seat are sequentially connected to form a circular inner cavity, with the copper layer separating the contact seat and the contact portion. The magnetic component is rotatably disposed within the circular inner cavity so that the first side of the contact seat is a magnetic attraction surface. The magnetic component has the following two working positions:

[0015] In the demagnetization station, both ends of the magnetic component simultaneously contact the contact part, the copper layer, and the contact seat;

[0016] In the magnetic suction station, the two ends of the magnetic component respectively abut against the contact seat and the contact part.

[0017] Preferably, the contact portion is provided with a vertically extending portion, the first side of the vertically extending portion is a vertical reference surface, and the vertically extending portion is provided with a scraping plate extending away from the vertical base member.

[0018] Preferably, the locking member is rotatably mounted on the sliding seat, and a permanent magnet is provided in the locking groove to drive the magnetized locking member to deflect in a figure-eight shape and abut against the locking groove.

[0019] Preferably, both the vertical base and the L-shaped base are provided with observation holes, and the locking groove is provided with a through horizontal hole coaxial with the observation holes. The locking member is deflected into a figure-eight shape to block the through horizontal hole at its end.

[0020] Preferably, the locking assembly further includes a movable ring and an elastic element. The movable ring is axially slidably disposed on the vertical base and the first end of the movable ring is slidably disposed on the inclined guide surface of the sliding seat. The elastic element is used to drive the movable ring to slide out of the outside of the vertical base and reset.

[0021] In the above technical solution, the guide rail straightness measuring fixture provided by the present invention has the following beneficial effects: A horizontal base and a vertical base are respectively provided in the horizontal and vertical parts of the L-shaped base, and the fixing assembly fixes the vertical part to the guide rail slider of the machine tool. At this time, the vertical part makes the straight reference plane of the horizontal part and the horizontal base parallel to the machine tool guide rail. The dial indicator base can be set in the second mounting groove to abut against the straight reference plane, and the dial indicator head abuts against the machine tool guide rail. By driving the movable mounting base slider... The dial indicator base slides along a linear reference plane to measure the straightness of the guide rail. Straightness measurement can be performed simply by mounting the fixture onto the slider using a fixing assembly, and then mounting the dial indicator onto the fixture. No additional straightedge or clamps are required, simplifying the operation and reducing measurement errors caused by multiple fixings, thus improving inspection efficiency. Furthermore, the slider of the guide rail can move the entire fixture, allowing the dial indicator head to contact different sections of the guide rail, thereby enabling multi-segment measurement of the guide rail and improving measurement accuracy. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0024] Figure 2 This is a schematic cross-sectional view of the overall structure provided for an embodiment of the present invention;

[0025] Figure 3 This is a partially enlarged schematic diagram of the vertical and horizontal base components provided in an embodiment of the present invention;

[0026] Figure 4 This is a partial structural schematic diagram of the overall structure provided in the embodiments of the present invention;

[0027] Figure 5 This is a partially enlarged schematic diagram of point A provided in an embodiment of the present invention;

[0028] Figure 6 This is a partially enlarged schematic diagram of point B provided in an embodiment of the present invention;

[0029] Figure 7 A schematic diagram of the tooling provided in the embodiment of the present invention for measuring the parallelism of the guide rail;

[0030] Figure 8 A schematic diagram of the tooling provided in the embodiment of the present invention for measuring the straightness of a guide rail;

[0031] Figure 9 This is a schematic diagram of a tooling device equipped with a dial indicator for parallelism measurement, provided in an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 11. L-shaped base; 111. Horizontal part; 1111. First mounting part; 1112. Sliding groove; 112. Vertical part; 12. Movable placement seat; 121. Second mounting groove; 122. Third mounting groove; 21. Vertical base member; 211. Connecting hole; 212. Contact part; 213. Vertical extension part; 22. Horizontal base member; 221. Straight reference plane; 222. Columnar connecting part; 2221. Locking groove; 2222. Through-hole 223. Through hole; 223. Transition section; 2231. Abutment groove; 23. Locking fastener; 24. Secondary vertical auxiliary component; 241. Mating groove; 31. Locking component; 32. Moving ring; 33. Sliding seat; 331. Pressing part; 34. Elastic component; 4. Airbag component; 5. Fixing component; 51. Magnetic component; 511. Rotating handle; 52. Contact layer; 53. Contact seat; 54. Copper layer; 6. Scraping plate; 7. Observation hole; 8. Permanent magnet component. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0035] like Figure 1-9 As shown, a guide rail straightness measuring fixture includes:

[0036] The L-shaped base 11 is divided into a horizontal part 111 and a vertical part 112 according to its structure. A horizontal base 22 and a vertical base 21 are respectively installed in parallel in the horizontal part 111 and the vertical part 112, and the horizontal base 22 and the vertical base 21 are locked vertically.

[0037] The movable placement seat 12 is located on the horizontal part 111 and is slidably disposed parallel to the horizontal base 22. The movable placement seat 12 is provided with a second mounting groove 121 that penetrates the straight reference surface 221 facing the horizontal base 22.

[0038] Fixing component 5, which is used to fix the L-shaped base 11 to the slider.

[0039] Specifically, such as Figure 1 As shown, the L-shaped base 11 has a horizontal portion 111 and a vertical portion 112. The horizontal base member 22 is installed within the horizontal portion 111 and parallel to it, while the vertical base member 21 is installed within the vertical portion 112 and parallel to it. Figure 2 As shown, a sliding groove 1112 parallel to the horizontal part 111 is provided, and the movable placement seat 12 is slidably disposed in the sliding groove 1112, and as... Figure 3 As shown, a straight reference surface 221 is provided on the transverse base 22. The straight reference surface 221 has low straightness and flatness as a reference surface. When it is necessary to measure the straightness of the guide rail, such as... Figure 8 As shown, the machine tool typically has two machine tool guideways and a drive screw. The fixture can be fixed to the slider of the guideway to be measured by the fixing component 5, making the horizontal part 111 of the L-shaped base 11 parallel to the guideway. The base of the measuring dial indicator can be set in the second mounting groove 121 to abut against the linear reference surface 221, and the dial indicator head abuts against the machine tool guideway. By driving the movable placement seat 12 to slide, the dial indicator base is pushed to slide along the linear reference surface 221 to measure the straightness of the guideway to be measured. Straightness measurement can be performed simply by installing the fixture onto the slider by the fixing component 5 and then installing the measuring dial indicator onto the fixture. Furthermore, the fixture can be moved by the slider of the guideway to allow the dial indicator head to abut against different sections of the guideway to be measured, thereby realizing multi-segment measurement of the guideway to be measured and improving measurement accuracy. Moreover, no additional straightedge and fixing fixture are required, simplifying the operation process and reducing measurement errors caused by multiple fixings, thus improving inspection efficiency.

[0040] The horizontal base 22 and the vertical base 21 can be vertically locked by providing protrusions and embedded grooves, or by having coaxial threaded holes on both and installing them with bolts through the threaded holes to lock the horizontal base 22 and the vertical base 21 vertically, or by other structures known to those skilled in the art that can vertically lock the horizontal base 22 and the vertical base 21.

[0041] The fixing component 5 can be a bolt assembly that uses bolts to fix the tooling assembly to the slider, or a clamping frame that clamps the tooling assembly to the slider, or any other fixing component 5 known to those skilled in the art.

[0042] Furthermore, since the transverse base 22 and the vertical base 21 are locked in a vertical position to increase the verticality accuracy of the L-shaped base 11 itself, the parallelism between the horizontal portion 111 of the L-shaped base 11 and the straight reference surface 221 of the transverse base 22 and the machine tool guide rail is increased and guaranteed, thereby reducing the measurement error of the straightness of the machine tool guide rail and improving the data accuracy.

[0043] Furthermore, the machine tool typically has two machine tool guideways and a drive screw. The fixture can also be mounted onto the slider of one of the guideways via the fixing assembly 5, such that the horizontal part 111 is perpendicular to the machine tool guideway and its end extends towards the other side of the machine tool guideway. A first mounting part 1111 is also provided at the end of the horizontal part 111, such as... Figure 9 As shown, two different dial gauge holders can be installed through the first mounting part 1111 and the second mounting slot 121. The measuring dial gauges on the two holders are respectively in contact with another guide rail and lead screw. At this time, the slider can be driven to move the entire fixture along the guide rail, thereby causing the dial gauge head to move along the other guide rail and lead screw surface to measure the parallelism between the machine tool's guide rail and lead screw, increasing the usable range and applicability of the fixture. The movable placement seat 12 can slide on the L-shaped base 11 to change its position, thereby making this fixture applicable to machine tools of different sizes for parallelism measurement.

[0044] In the above technical solution, a horizontal base 22 and a vertical base 21 are respectively provided in the horizontal part 111 and the vertical part 112 of the L-shaped base 11. The fixing assembly 5 fixes the vertical part 112 to the guide rail slider of the machine tool. At this time, the vertical part 112 makes the straight reference plane 221 of the horizontal part 111 and the horizontal base 22 parallel to the machine tool guide rail. The dial indicator base can be set in the second mounting groove 121 to abut against the straight reference plane 221, and the dial indicator head abuts against the machine tool guide rail. By driving the movable placement seat 12 The dial indicator base slides along the linear reference plane 221 to measure the straightness of the guide rail. Straightness measurement can be performed simply by mounting the fixture onto the slider using the fixing component 5 and then mounting the dial indicator onto the fixture. No additional straightedge or fixing clamps are required, simplifying the operation process and reducing measurement errors caused by multiple fixings, thus improving inspection efficiency. Furthermore, the slider of the guide rail can drive the overall movement of the fixture so that the dial indicator head can contact different sections of the guide rail, thereby achieving multi-segment measurement of the guide rail and improving measurement accuracy.

[0045] As another embodiment of the present invention, it also includes a locking fastener 23. A columnar connecting portion 222 provided on the transverse base 22 passes through the connecting hole 211 of the vertical base 21 and extends out. A locking component is provided in the vertical base 21. The locking component includes a sliding seat 33 and a locking member 31 provided thereon. The locking fastener 23 is threadedly connected to the columnar connecting portion 222, driving the sliding seat 33 to slide so that the locking member 31 is embedded in the locking groove 2221 opened on the columnar connecting portion 222.

[0046] Specifically, such as Figure 3 As shown, a columnar connecting part 222 is provided at the right end of the horizontal base 22, while the connecting hole 211 on the vertical base 21 is perpendicular to the vertical side of the vertical base 21, as shown. Figure 2 As shown, the vertical base 21 is first installed into the vertical part 112 of the L-shaped base 11, and then the horizontal base 22 is installed into the horizontal part 111 of the L-shaped base 11. The columnar connecting part 222 passes through the connecting hole 211 and extends out of the outside of the vertical base 21. At this time, the locking fastener 23 can be threaded onto the columnar connecting part 222 and abut against the surface of the vertical base 21 to complete the vertical locking between the horizontal base 22 and the vertical base 21. This ensures the verticality of the vertical base 21 and the horizontal base 22, while also ensuring the verticality of the L-shaped base 11, thereby reducing the error generated when using tooling to test the straightness of the guide rail.

[0047] Furthermore, a sliding seat 33 and a locking member 31 are provided in the vertical base member 21. When the locking member 23 is threaded onto the columnar connecting part 222 and abuts against the vertical base member 21, the locking member 23 will drive the sliding seat 33 to slide so that the end of the locking member 31 extends into the connecting hole 211, thereby causing the end of the locking member 31 to abut against the locking groove 2221 on the columnar connecting part 222, thereby further increasing the connection and locking stability between the columnar connecting part 222 and the vertical base member 21.

[0048] The locking fastener 23 can be used to drive the sliding seat 33 by means of a rack and a gear, with the gear meshing with the sliding seat 33, and the rack sliding with one end extending out of the outside of the vertical base 21. When the locking fastener 23 is threaded onto the columnar connecting part 222, the locking fastener 23 pushes the rack to slide so as to drive the sliding seat 33 to slide through the gear. Alternatively, it can be driven by a linkage mechanism consisting of a rocker arm and a sliding rod, with the locking fastener 23 pushing the sliding rod to drive the rocker arm to swing and push the sliding seat 33 to slide. Other structural substitutions known to those skilled in the art are also acceptable.

[0049] As another embodiment of the present invention, it also includes an airbag component 4, which is disposed in the vertical base 21 so that the end is located in front of the connecting hole 211 in the default state. A conical transition portion 223 is provided between the columnar connecting portion 222 and the transverse base 22. The airbag component 4 is slidably squeezed by the sliding seat 33 and the end expands to abut against and lock the transition portion 223.

[0050] Specifically, such as Figure 3 As shown, the columnar connecting portion 222 and the transverse base member 22 are connected by a conical transition portion 223, as... Figure 2 As shown, the end opening of the connecting hole 211 is also conical. When the horizontal base 22 and the vertical base 21 are installed into the L-shaped base 11 and locked vertically, the vertical base 21 is installed first, and then the horizontal base 22 is installed into the L-shaped base 11. At this time, the end of the columnar connecting part 222 first abuts against the airbag part 4 and then slides into the connecting hole 211. This avoids the columnar connecting part 222 from damaging or enlarging the connecting hole 211, which would reduce the coaxial accuracy between the columnar connecting part 222 and the connecting hole 211 and reduce the verticality accuracy of the vertical base 21 and the horizontal base 22. Then, the vertical base 21 and the horizontal base 22 are locked together by the locking fastener 23. At this time, the conical transition part 223 abuts against the conical end opening of the connecting hole 211, thereby increasing the connection stability between the vertical base 21 and the horizontal base 22 and reducing the relative vibration between them.

[0051] Furthermore, such as Figure 3 As shown, the transition portion 223 is provided with an abutment groove 2231, and as Figure 5As shown, a squeezing part 331 is provided on the sliding seat 33, and the left end of the airbag 4 extends out and is located in front of the port opening of the connecting hole 211, while the right end is located on the sliding path of the squeezing part 331. When the locking fastener 23 is threaded onto the columnar connecting part 222 to make the sliding seat 33 slide, the sliding seat 33 is driven to slide, causing the squeezing part 331 to squeeze the right end of the airbag 4, causing the left end of the airbag 4 to expand and deform and extend into and abut against the abutment groove 2231. This further clamps and abuts against the vertical base 21 and the horizontal base 22 while also having a certain buffering effect, preventing the vertical base 21 and the horizontal base 22 from continuously shaking due to external force resonance, which would interfere with the measurement accuracy.

[0052] As another embodiment of the present invention, it also includes a secondary vertical auxiliary member 24, which has a mating groove 241. The secondary vertical auxiliary member 24 is vertically arranged on the side of the horizontal part 111 near the end so that the mating groove 241 is fitted onto the horizontal base member 22.

[0053] Specifically, such as Figure 3 As shown, a mating groove 241 is provided on the secondary vertical auxiliary component 24 to mate with the horizontal base component 22. When installing the tooling, the secondary vertical auxiliary component 24 is first vertically installed on the horizontal part 111 of the L-shaped base 11, and then the vertical base component 21 is vertically installed on the vertical part 112. At this time, the horizontal base component 22 passes through the mating groove 241 to be installed on the horizontal part 111 of the L-shaped base 11. Figure 2 As shown, the columnar connecting part 222 at the right end of the transverse base 22 passes through the connecting hole 211 of the vertical base 21 and is locked by the fastener 23. The transverse base 22 is fixed by the secondary vertical auxiliary part 24 near the left side. The secondary vertical auxiliary part 24 is used to avoid the error of the straight reference surface 221 caused by the transverse base 22 being too long and twisted. This further reduces the straightness error of the tooling and improves the measurement accuracy.

[0054] As another embodiment of the present invention, the distance from the side of the mating groove 241 to the upper end of the secondary vertical auxiliary member 24 is a, the distance between the straight reference plane 221 and the axis of the columnar connecting part 222 is b, and the distance from the axis of the connecting hole 211 of the vertical base member 21 to the upper end of the vertical base member 21 is c, wherein: a+b=c.

[0055] Specifically, such as Figure 3As shown, during the manufacturing process, the reference distance from the side of the mating groove 241 of the secondary vertical auxiliary component 24 near its upper end to its upper end surface is 'a', the reference distance between the straight reference surface 221 of the transverse base component 22 and the axis of the columnar connecting part 222 is 'b', and the reference distance from the axis of the connecting hole 211 of the vertical base component 21 to the upper end surface of the vertical base component 21 is 'c', such that a + b = c. When all three are simultaneously assembled on the L-shaped base 11, as shown... Figure 2 As shown, since the reference distance on the secondary vertical auxiliary component 24 plus the reference distance on the horizontal base component 22 equals the reference distance on the vertical base component 21, if the tooling assembly is error-free, the upper surfaces of the secondary vertical auxiliary component 24 and the vertical base component 21 should be parallel to each other and aligned on the same plane. The movable placement seat 12 is also provided with a third mounting groove 122, which can be placed on the third mounting groove 122. Then, the movable placement seat 12 is slid so that the dial indicator head makes contact measurement of the straightness and parallelism of the upper surfaces of the secondary vertical auxiliary component 24 and the vertical base component 21, thereby obtaining the error value of the tooling itself, which is convenient for the tooling self-inspection and maintenance.

[0056] In another embodiment of the present invention, the fixing component 5 includes a magnetic element 51, a contact seat 53, and a copper layer 54. A contact portion 212 is provided on the vertical base 21. The contact portion 212, the copper layer 54, and the contact seat 53 are connected in sequence to form a circular inner cavity. The copper layer 54 separates the contact seat 53 and the contact portion 212. The magnetic element 51 is rotatably disposed in the circular inner cavity so that the first side of the contact seat 53 is a magnetic attraction surface. The magnetic element 51 has the following two working positions:

[0057] In the demagnetization station, both ends of the magnetic component 51 simultaneously abut against the contact portion 212, the copper layer 54, and the contact seat 53;

[0058] In the magnetic suction station, the two ends of the magnetic component 51 abut against the contact seat 53 and the contact part 212, respectively.

[0059] Specifically, such as Figure 6 As shown, when the vertical base 21 is installed onto the vertical portion 112 of the L-shaped base 11, the contact portion 212 of the vertical base 21 is located at the bottom of the vertical portion 112, as... Figure 6 As shown, the copper layer 54 and the contact seat 53 are then sequentially installed onto the contact portion 212 so that the contact portion 212, the copper layer 54 and the contact seat 53 enclose a circular inner cavity. The magnetic element 51 is rotatably disposed on the contact portion 212 so that the magnetic element 51 can rotate coaxially within the circular inner cavity, and the magnetic element 51 is provided with a rotating handle 511 extending out of the outside of the contact portion 212.

[0060] When the entire fixture needs to be attached to the slider for measuring the straightness or parallelism of the machine tool guideway, the magnetic component 51 is rotated to the magnetic suction position by rotating the handle 511. At this time, one end of the magnetic component 51 contacts the contact part 212, and the other end contacts the contact seat 53, thereby magnetizing the contact part 212 and the contact seat 53. The first side of the contact seat 53 facing away from the contact part 212 becomes the suction surface. The magnetized contact seat 53 allows its first side to be attached and fixed to the slider of the machine tool guideway, thus achieving the suction and fixation of the entire fixture. Bolts are not required to fix the entire fixture to the slider of the guideway, which facilitates the improvement of the efficiency of fixture installation and disassembly and practical use.

[0061] When the tooling assembly needs to be removed from the slider, the magnetic component 51 is rotated to the demagnetization position by rotating the handle 511. At this time, both ends of the magnetic component 51 abut against the contact portion 212, the copper layer 54 and the contact seat 53. That is, both ends of the magnetic component 51 abut against the same object, thereby closing the magnetic lines of force of the magnetic component 51. At this time, the contact portion 212 and the contact seat 53 will not be magnetized by the magnetic component 51 and will not generate an attraction force. Then the tooling assembly can be removed from the slider.

[0062] The connection between the contact portion 212, the copper layer 54, and the contact seat 53 can be a welded fixed connection or a countersunk copper stud threaded through the contact seat 53 and the copper layer 54 onto the contact portion 212. When the countersunk copper stud connection method is used, the contact seat 53 can be disassembled relative to the contact portion 212. Since the first side of the contact seat 53 is the adsorption surface and the contact horizontal reference surface, the small contact seat 53 can be disassembled by bolts to allow for individual grinding of the adsorption surface, thereby facilitating the maintenance of the overall accuracy of the tooling.

[0063] Furthermore, contact layers 52 made of soft material can be symmetrically arranged inside the circular inner cavity. One contact layer 52 contacts the contact portion 212, and the other contact layer 52 contacts the contact seat 53. A copper layer 54 separates the two contact layers 52. When the magnetic component 51 rotates to rotate within the circular inner cavity, the end of the magnetic component 51 rotates and abuts against the contact layer 52, thereby alleviating the wear of the end of the magnetic component 51 and increasing its service life.

[0064] As another embodiment of the present invention, a vertical extension portion 213 is provided on the contact portion 212, the first side of the vertical extension portion 213 is a vertical reference surface, and a scraping plate 6 extending away from the vertical base member 21 is provided on the vertical extension portion 213.

[0065] Specifically, such as Figure 4As shown, the side of the vertical extension 213 of the contact part 212 facing the contact seat 53 is the first side. When the entire fixture is attached to the slider by the magnetic component 51, the contact seat 53, the copper layer 54 and the contact part 212, the first side of the vertical extension 213 approaches and abuts against the side of the slider, thereby ensuring the perpendicularity between the vertical base 21 and the top surface of the slider. Secondly, a scraping plate 6 is provided on the vertical extension 213. The scraping plate 6 is arc-shaped so that its end abuts against the machine tool guide rail. When the entire fixture is installed perpendicular to the machine tool guide rail for parallelism detection, the scraping plate 6 moves along with the slider as the fixture slides, and can scrape and clean the front side of the guide rail to remove impurities or dust from the guide rail, reduce vibration during slider sliding, and avoid parallelism detection errors.

[0066] Furthermore, when the tooling is fixed by the fixing component 5, the magnetic component 51 is located at the magnetic suction position, which makes the vertical extension 213 of the vertical base component 21 magnetic. The scraper plate 6 is arc-shaped to pick up the heavy iron impurities on the guide rail and adsorb them onto the vertical extension 213, thereby preventing the iron impurities from rolling back onto the guide rail and causing abnormal noise or vibration of the slider, and facilitating subsequent cleaning.

[0067] As another embodiment of the present invention, the locking member 31 is rotatably disposed on the sliding seat 33, and a permanent magnet 8 is disposed in the locking groove 2221 to drive the magnetized locking member 31 to deflect in a figure-eight shape and abut against the locking groove 2221.

[0068] Specifically, such as Figure 5 As shown, the upper end of the locking member 31 is slidably mounted on the sliding seat 33, and a permanent magnet 8 is provided in the locking groove 2221 of the columnar connecting part 222. When the fixture as a whole is attracted and fixed to the slider by the fixing assembly 5 for guide rail measurement, the magnetic member 51 is located in the magnetic attraction position to magnetize the vertical base member 21. The upper end of the locking member 31 is located inside the vertical base member 21, and the lower end extends out of the vertical base member 21, thereby making both locking members 31 magnetized. At this time, the lower magnetic pole of the locking member 31 repels the permanent magnet 8, thereby making The lower end of the locking member 31 deflects away from the permanent magnet 8 under the repulsive force of the permanent magnet 8. At this time, the locking member 31 is deflected by the force and abuts against the locking groove 2221 in a figure-eight shape. The locking member 31 is in a figure-eight shape and, through the repulsive force between it and the permanent magnet 8, it can be positioned between the vertical base member 21 and the horizontal base member 22 to play a buffering role. This further avoids the continuous shaking caused by the external force resonance between the horizontal base member 22 and the vertical base member 21, which interferes with the measurement accuracy and increases the connection stability between the horizontal base member 22 and the vertical base member 21.

[0069] As another embodiment of the present invention, observation holes 7 are provided on both the vertical base 21 and the L-shaped base 11, and a through horizontal hole 2222 coaxial with the observation hole 7 is provided in the locking groove 2221. The locking member 31 is deflected into a figure-eight shape to block the through horizontal hole 2222 at its end.

[0070] Specifically, such as Figure 3 and Figure 4 As shown, both the L-shaped base 11 and the vertical base 21 are provided with observation holes 7. When both the horizontal base 22 and the vertical base 21 are installed on the L-shaped base 11, the through horizontal hole 2222 in the locking groove 2221 is coaxially connected with the observation hole 7. Figure 5 As shown, when the fixture is attached to the slider by the fixing component 5 for measuring the guide rail, the magnetic component 51 is located at the magnetic suction position to magnetize the vertical base component 21. The upper end of the locking component 31 is located inside the vertical base component 21, and the lower end extends outside the vertical base component 21, thus magnetizing both locking components 31. At this time, the lower magnetic pole of the locking component 31 repels the permanent magnet component 8, causing the lower end of the locking component 31 to deflect away from the permanent magnet component 8 under the repulsive force. At this time, the locking component 31 is deflected by force and abuts against the locking groove 2221 in a figure-eight shape. If the installation error between the horizontal base 22 and the vertical base 21 and the L-shaped base 11 is low, the lower end of the locking member 31 will completely cover the through hole 2222 when it abuts against the locking groove 2221 in a figure-eight shape. However, if there is an installation error and the straight reference surface 221 of the horizontal base 22 is not horizontal, the locking groove 2221 on it is not vertical. As a result, even if the locking member 31 is repelled by the permanent magnet 8, the locking member 31 will not rotate into a figure-eight shape due to jamming, thus exposing the through hole 2222.

[0071] When the fixture is installed, look into the observation hole 7 with the naked eye. If the hole is completely blocked by the locking part 31 and no light is exposed, the overall installation reference of the fixture is well maintained. If light is exposed in the observation hole 7, it indicates that the installation of the transverse base 22 of the fixture is misaligned, causing the straight reference surface 221 to be deflected. This facilitates the preliminary self-test when the fixture is installed and increases the accuracy of the fixture inspection.

[0072] As another embodiment of the present invention, the locking assembly further includes a movable ring 32 and an elastic member 34. The movable ring 32 is axially slidably disposed on the vertical base 21 and the first end of the movable ring 32 is slidably disposed on the inclined guide surface of the sliding seat 33. The elastic member 34 is used to drive the movable ring 32 to slide out of the outside of the vertical base 21 and reset.

[0073] Specifically, such as Figure 5As shown, the movable ring 32 is axially slidably disposed on the vertical base 21 with its right end facing outward from the vertical base 21. The left end of the movable ring 32 is the first end and is slidably disposed on the inclined guide surface of the sliding seat 33. That is, when the locking fastener 23 is threaded onto the columnar connecting part 222, the locking fastener 23 pushes against the right end of the movable ring 32 to make the movable ring 32 slide to the left. Subsequently, the left end of the movable ring 32 slides along the inclined guide surface against the sliding seat 33 and slides closer to the columnar connecting part 222, thereby making... The lower end of the locking member 31 extends into the locking groove 2221; when it is necessary to remove the horizontal base member 22 and the vertical base member 21 from the L-shaped base 11 to grind and correct the reference surface of the tooling, the locking member 23 is removed from the columnar connection 222, and the movable ring 32 is pushed by the elastic member 34 to slide and reset to the outside of the vertical base member 21 so that the sliding seat 33 and the locking member 31 slide and reset away from the columnar connection 222, which facilitates the improvement of the disassembly and installation efficiency between the vertical base member 21 and the horizontal base member 22.

[0074] The elastic element 34 can be any other elastic element known to those skilled in the art, such as a spring, an airbag, or an elastic plate.

[0075] Working principle: First, the secondary vertical auxiliary component 24 is vertically installed on the horizontal part 111 of the L-shaped base 11. Then, the vertical base component 21 is vertically installed on the vertical part 112. At this time, the horizontal base component 22 passes through the mating groove 241 to be installed on the horizontal part 111 of the L-shaped base 11. Figure 2 As shown, the columnar connecting portion 222 at the right end of the transverse base 22 passes through the connecting hole 211 of the vertical base 21 and is locked by the fastener 23. The transverse base 22 is fixed near the left side by a secondary vertical auxiliary member 24. When the fastener 23 is threaded onto the columnar connecting portion 222 to vertically lock the transverse base 22 and the vertical base 21, the fastener 23 pushes against the right end of the movable ring 32 to make the movable ring 32 slide. The moving ring 32 moves to the left, and then the left end of the moving ring 32 slides along the inclined guide surface against the sliding seat 33 and slides closer to the columnar connecting part 222, so that the lower end of the locking member 31 extends into the locking groove 2221; while the sliding seat 33 squeezes the right end of the airbag member 4 during sliding, so that the left end of the airbag member 4 expands and deforms and extends into and abuts against the abutting groove 2231, thereby further clamping and abutting between the vertical base member 21 and the horizontal base member 22;

[0076] When it is necessary to measure the straightness of the guide rail, the fixture can be fixed on the slider of the guide rail to be measured by the fixing component 5. The magnetic component 51 is rotated to the magnetic suction position by rotating the handle 511. At this time, one end of the magnetic component 51 contacts the contact part 212 and the other end contacts the contact seat 53, thereby magnetizing the contact part 212 and the contact seat 53 by the magnetic component 51. At this time, the first side of the contact seat 53 facing away from the contact part 212 is the adsorption surface. The first side of the L-shaped base 11 can be magnetically attached to the slider of the machine tool guide rail by the magnetized contact seat 53, so that the horizontal part 111 of the L-shaped base 11 is parallel to the guide rail. The base of the measuring dial indicator can be set in the second mounting groove 121 to abut against the linear reference surface 221. The head of the measuring dial indicator abuts against the machine tool guide rail. By driving the movable placement seat 12 to slide, the measuring dial indicator base is pushed to slide along the linear reference surface 221 to measure the straightness of the guide rail to be measured. The straightness measurement can be performed by simply mounting the fixture onto the slider through the fixing component 5 and then mounting the measuring dial indicator onto the fixture.

[0077] When it is necessary to measure the parallelism between the guide rails, the fixture is fixed to the slider of the guide rail by the fixing component 5, so that the horizontal part 111 is perpendicular to the machine tool guide rail and the end of the horizontal part 111 extends to the machine tool guide rail on the other side. The end of the horizontal part 111 is also provided with a first mounting part 1111. Two different dial indicator seats can be installed through the first mounting part 1111 and the second mounting groove 121. The measuring dial indicators on the two dial indicator seats contact the other guide rail and the lead screw respectively. At this time, the slider can be driven to move the fixture along the guide rail, thereby causing the dial indicator head to move along the other guide rail and the surface of the lead screw, thereby measuring the parallelism between the machine tool guide rail and the lead screw.

[0078] When the fixing component 5 fixes the entire tooling onto the slider of the guide rail, the dial indicator base can be placed on the third mounting slot 122. Then, the movable placement seat 12 slides so that the dial indicator head makes contact measurements of the straightness and parallelism of the upper surface of the secondary vertical auxiliary component 24 and the vertical base component 21, thereby obtaining the error value of the tooling itself. Furthermore, the upper end of the locking component 31 is located inside the vertical base component 21, and the lower end extends outside the vertical base component 21, thus magnetizing both locking components 31. At this time, the lower magnetic pole of the locking component 31 repels the permanent magnet component 8, causing the lower end of the locking component 31 to deflect away from the permanent magnet component 8 under the repulsive force of the permanent magnet component 8. When the magnetic component 8 is applied, the locking component 31 is deflected by force and comes into contact with the locking groove 2221 in a figure-eight shape. If the installation error between the horizontal base 22 and the vertical base 21 and the L-shaped base 11 is low, the lower end of the locking component 31 will completely cover the through hole 2222 when it comes into contact with the locking groove 2221 in a figure-eight shape. However, if there is an installation error and the straight reference surface 221 of the horizontal base 22 is not horizontal, the locking groove 2221 on it will not be vertical. As a result, even if the locking component 31 is repelled by the permanent magnet 8, the locking component 31 will not rotate into a figure-eight shape due to jamming, thus exposing the through hole 2222.

[0079] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A guide rail straightness measurement tool characterized by, include: The L-shaped base is divided into a horizontal part and a vertical part according to its structure. A horizontal base member and a vertical base member are installed in parallel in the horizontal part and the vertical part respectively, and the horizontal base member and the vertical base member are locked vertically. The movable placement seat is located on the horizontal part and is slidably disposed parallel to the horizontal base, and the movable placement seat is provided with a second mounting groove that penetrates the straight reference surface facing the horizontal base. A fixing component for securing the L-shaped base to the slider; It also includes a locking component, wherein a columnar connecting part provided on the horizontal base passes through the connecting hole of the vertical base and extends out, and a locking assembly is provided inside the vertical base. The locking assembly includes a sliding seat and a locking member provided thereon. The locking component is threadedly connected to the columnar connecting part to drive the sliding seat to slide so that the locking member is embedded in the locking groove opened on the columnar connecting part. It also includes an airbag component, which is disposed in the vertical base so that the end is located in front of the connecting hole in the default state. A conical transition portion is provided between the columnar connecting portion and the horizontal base. The airbag component is slidably squeezed by the sliding seat and the end expands to abut against and lock the transition portion. The fixing assembly includes a magnetic component, a contact seat, and a copper layer. A contact portion is provided on the vertical base. The contact portion, copper layer, and contact seat are sequentially connected to form a circular inner cavity, with the copper layer separating the contact seat and the contact portion. The magnetic component is rotatably disposed within the circular inner cavity so that the first side of the contact seat is a magnetic attraction surface. The magnetic component has the following two working positions: In the demagnetization station, both ends of the magnetic component simultaneously contact the contact part, the copper layer, and the contact seat; In the magnetic suction station, the two ends of the magnetic component respectively abut against the contact seat and the contact portion; The contact portion is provided with a vertically protruding portion, the first side of the vertically protruding portion is a vertical reference plane, and the vertically protruding portion is provided with a scraping plate extending away from the vertical base member; The locking element is rotatably mounted on the sliding seat, and a permanent magnet is provided in the locking groove to drive the magnetized locking element to deflect in a figure-eight shape and abut against the locking groove.

2. The guide rail straightness measurement tool according to claim 1, wherein It also includes a secondary vertical auxiliary component, which has a mating groove. The secondary vertical auxiliary component is vertically arranged on the side of the horizontal part near the end so that the mating groove fits onto the horizontal base.

3. The guide rail straightness measurement tool of claim 2, wherein, The distance from the side of the mating groove to the upper end of the secondary vertical auxiliary component is a, the distance between the straight reference plane and the axis of the columnar connecting part is b, and the distance from the axis of the connecting hole of the vertical base to the upper end of the vertical base is c, where: a+b=c.

4. The guide rail straightness measuring fixture according to claim 1, characterized in that, Both the vertical base and the L-shaped base are provided with observation holes. The locking groove is provided with a through horizontal hole coaxial with the observation hole. The locking member is deflected into a figure-eight shape to block the through horizontal hole at its end.

5. The guide rail straightness measuring fixture according to claim 1, characterized in that, The locking assembly also includes a movable ring and an elastic element. The movable ring is axially slidably disposed on the vertical base and the first end of the movable ring is slidably disposed on the inclined guide surface of the sliding seat. The elastic element is used to drive the movable ring to slide out of the outside of the vertical base and reset.

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