Large multi-edge pyramid sliding surface grinding and matching device and grinding and matching method

Abstract

The device and method for lapping the sliding surface of a large multi-edged cone of the present invention belong to the field of lapping the sliding surface of a large multi-edged cone, and the purpose is to improve the efficiency and controllability of lapping. It includes a winch, a lapping inclined block, a indexing tooling device, a bottom supporting block and a tooling mandrel; the indexing tooling device includes an indexing disc, and a plurality of hoisting holes are evenly distributed on the concentric circumference of the indexing disc, and the number of hoisting holes is equal to the number of edges of the multi-edged cone. The lapping inclined block is freely arranged on the current lapping sliding surface of the multi-edged cone; the end of the traction rope of the winch is connected to the lapping inclined block, and the lapping inclined block is tractioned to move uniformly along the current lapping sliding surface. The indexing tooling device is used to discretize the rotation angle of the multi-edged cone, and the moment balance theory is used to realize rapid pose conversion, efficiently adjust the position of the sliding surface to be lapped of the multi-edged cone to a predetermined working position, solve problems such as uneven contact of the sliding surface caused by the angle indexing error of the multi-edged cone, improve work efficiency, and ensure the smooth progress of production.

Description

Technical Field

[0001] The present invention belongs to the technical field of grinding and matching of sliding surfaces of large multi-edge cones, and specifically relates to a grinding and matching device and a grinding and matching method for sliding surfaces of large multi-edge cones. Background Art

[0002] With the rapid development of the high-end heavy equipment manufacturing field, heavy equipment is developing in the direction of large size, heavy weight, and high precision. Currently, the core component of a certain heavy equipment is a core cone assembly with an overall linear tapered cone structure. The core cone assembly includes a core shaft and a core cone coaxially installed on the core shaft. The core cone is Figure 1 the multi-edge cone shown. The large end diameter of the core cone is 2377 mm, the small end diameter is 1426 mm, the height of the core cone is 4520 mm, the diameter difference between the large end and the small end is 851 mm, and the taper of the core cone is as high as 21%, belonging to the field of extreme manufacturing. 18 slide plate units are evenly distributed along the circumferential direction on the outer circular surface of the core cone. These slide plate units are fastened to the bottom surface of the tapered plane slide plate groove with a taper of 6°. These 18 slide plate units enclose a regular octadecagon envelope surface. Currently, after assembly, the slide plate and the corresponding inclined block need to be paired and ground, and it is required to ensure that the contact area between the slide plate and the inclined block reaches more than 75%.

[0003] Such a linear tapered multi-edge cone structure has the characteristics of large size, heavy weight, a large number of edges, and high requirements for the contact surface, which puts extremely high requirements on the grinding and matching process. Most of the existing technologies use the manual scraping method for grinding and matching. A flat plate or a straightedge of the corresponding precision level is used, and the flat plate or the straightedge is pushed and pulled along the horizontal direction, and no force is allowed to be applied to the top surface of the flat plate or the straightedge. This kind of grinding and matching method requires artificial addition of constraints, and the magnitude and direction of the scraping force need to be continuously adjusted according to the shape of the workpiece to be ground and matched. Such a method not only takes a long time, has poor repeatability, low efficiency, weak safety, has great uncontrollability, but also is difficult to solve the problem of uneven contact of the sliding surface caused by the angular indexing error of the multi-edge cone, and can no longer meet the development requirements of the current high-end heavy equipment manufacturing field. Summary of the Invention

[0004] The purpose of the present invention is to provide a grinding and matching device and a grinding and matching method for sliding surfaces of large multi-edge cones, so as to improve the efficiency of grinding and matching.

[0005] The technical solution adopted by the present invention is: a lapping device for the sliding surface of a large multi-edged cone, including a winch, a lapping wedge, a indexing tooling device, a bottom support block and a tooling mandrel; the indexing tooling device includes an indexing disk, and a plurality of lifting holes are evenly distributed on the concentric circumference of the indexing disk, and the number of the lifting holes is equal to the number of edges of the multi-edged cone; the multi-edged cone is coaxially and detachably assembled on the tooling mandrel and lies horizontally on the bottom support block; one indexing tooling device is coaxially and detachably installed at each end of the tooling mandrel, and the lifting holes of the indexing tooling device are centered with the sliding surface of the multi-edged cone; the winch is installed on the large end side of the multi-edged cone; the lapping wedge is freely arranged on the current lapping sliding surface of the multi-edged cone; the end of the towing rope of the winch is connected to the lapping wedge, and the lapping wedge is towed to move uniformly along the current lapping sliding surface, and the towing rope is parallel to the sliding surface where the lapping wedge is located.

[0006] Further, limiting structures are arranged on both sides of the current lapping sliding surface.

[0007] Further, the limiting structures include several limiting blocks spaced along the extending direction of the current lapping sliding surface, and the distance enclosed by three adjacent limiting blocks is less than the length of the lapping wedge.

[0008] Further, the bottom support block includes a first support block supporting at the bottom of the multi-edged cone and a second support block supporting at the bottom of the tooling mandrel, and both the first support block and the second support block are V-shaped blocks.

[0009] Further, the winch is supported on a support, and the support is arranged near the large end of the multi-edged cone and is located on the extension line of the axis of the multi-edged cone.

[0010] Further, concave key grooves are arranged on the end faces at both ends of the tooling mandrel, and both ends of the key grooves penetrate radially along the end face of the tooling mandrel; the indexing disk includes a large disk and a small disk; the large disk is a ring with a central circular hole, and the central circular hole is adapted to the tooling mandrel; one side of the small disk is provided with a convex block extending along its diameter direction; the convex block is inserted into the central circular hole and is adapted to the key groove at the end of the tooling mandrel; the large disk and the small disk are bolted, and the large disk is sleeved on the tooling mandrel, and the convex block of the small disk is inserted into the key groove of the tooling mandrel; a lifting ring is fixed on the other side of the small disk opposite to the large disk; the lifting holes are arranged on the part of the large disk exposed outside the small disk.

[0011] A lapping method for the sliding surface of a large multi-edged cone includes the following steps:

[0012] Step 1: Horizontally support the whole formed by assembling the multi-edged cone on the tooling mandrel on the bottom support block; fasten the indexing tooling device to both ends of the tooling mandrel, and the indexing disk of the indexing tooling device is coaxial with the tooling mandrel;

[0013] Step 2: Support the bearing on the extension line of the axis at the large end of the multi-edged pyramid, and place the winch on the bearing; adjust the installation height of the winch so that the towing rope is parallel to the sliding surface to be ground at the predetermined working position during towing.

[0014] Step 3: Adjust the sliding surface to be ground to the predetermined working position through the indexing tooling device as the current ground sliding surface; and install the limiting structures on both sides of the current ground sliding surface.

[0015] Step 4: Hoist the grinding inclined block to the lower limit of the current ground sliding surface.

[0016] Step 5: Connect the end of the towing rope of the winch to the grinding inclined block, start the winch to tow the grinding inclined block to move slowly and uniformly upward along the current ground sliding surface, and release the traction force on the grinding inclined block after moving to the upper limit, so that the grinding inclined block slides freely along the current ground sliding surface.

[0017] Step 6: Remove the grinding inclined block from the current ground sliding surface, and repeat Steps 3 to 5 to complete the grinding of the next sliding surface.

[0018] Further, before Step 3, pair and mark the hoisting holes of the indexing tooling device at the large end of the multi-edged pyramid, the hoisting holes of the indexing tooling device at the small end, and the sliding surface, so that the three establish a unique corresponding relationship.

[0019] Further, the hoisting holes of the indexing tooling device at the large end of the multi-edged pyramid and the hoisting holes of the indexing tooling device at the small end are respectively centered on the axial midline of the sliding surface.

[0020] Further, in Step 3, the hoisting holes of the indexing tooling device at the large end of the multi-edged pyramid corresponding to the sliding surface to be ground and the hoisting holes of the indexing tooling device at the small end are used as lifting points to lift synchronously, lift the large multi-edged pyramid to an appropriate height above the reference plane, and after automatic alignment is achieved through moment balance, lower it to be fixed on the bottom support block.

[0021] The beneficial effects of the present invention are: by providing a tooling mandrel that cooperates with the multi-edged pyramid and respectively providing indexing tooling devices at both ends of the tooling mandrel, using the indexing tooling device to discretize the rotation angle of the multi-edged pyramid, and using the moment balance theory and the principle of minimum potential energy, rapid pose conversion is achieved, and the position of the sliding surface to be ground of the multi-edged pyramid is efficiently adjusted to the predetermined working position, solving problems such as uneven contact of the sliding surface caused by angle indexing error of the multi-edged pyramid, improving work efficiency, and ensuring the smooth progress of production.

[0022] During the matching and grinding process, by using the moment balance and statics theory, the rotation angle of the multi-edged pyramid is discretized to quickly and accurately adjust the position of the matching and grinding sliding surface and make it balanced. After the multi-edged pyramid is balanced, it is fixed on the bottom support block, and limit structures are set on both sides of the current sliding surface to be matched and ground to control the left and right offset during the matching and grinding of the matching and grinding inclined block. In addition, by using the self-gravity of the matching and grinding inclined block, the fitting with the sliding plate surface is controlled. Since the taper of the multi-edged pyramid reaches 21%, a winch is used to apply an upward pulling force along the inclined plane to the matching and grinding inclined block for matching and grinding. During the return journey, the self-gravity of the matching and grinding inclined block is used to make it slide down naturally for matching and grinding. The entire matching and grinding process is simple to operate, time-consuming, efficient, and the matching consistency of each sliding surface is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the present invention;

[0024] Figure 2 is a front view of the indexing tooling device;

[0025] Figure 3 is Figure 2 a left view of;

[0026] Figure 4 is a schematic structural diagram of the end of the tooling mandrel.

[0027] In the figure, winch - 1, towing rope - 2, limit block - 3, matching and grinding inclined block - 4, support - 5, indexing tooling device - 6, indexing disc - 601, large disc - 601A, central circular hole - 601B, small disc - 601C, convex block - 601D, lifting hole - 602, lifting ring - 603, support block one - 7, support block two - 8, multi-edged pyramid - 9, sliding surface - 901A, tooling mandrel - 10, keyway - 10A. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following further describes the present invention with reference to the drawings and embodiments as follows:

[0029] A device for matching and grinding the sliding surface of a large multi-edged pyramid, such as Figure 1As shown, it includes a winch 1, a grinding and matching inclined block 4, a dividing tooling device 6, a bottom support block and a tooling mandrel 10; the dividing tooling device 6 includes a dividing disc 601, and a plurality of lifting holes 602 are evenly distributed on the concentric circumference of the dividing disc 601, that is, these lifting holes 602 are on the same circumference, and the center of the circumference coincides with the center of the dividing disc 601. The number of lifting holes 602 is equal to the number of edges of the polygonal cone 9. For example, the core cone mentioned in the background technology of this specification is a polygonal cone, and its outer peripheral surface is a regular octagon. It is an 18-sided cone with 18 edges. There are a total of 18 sliding surfaces that need to be ground, so the number of lifting holes 602 is also 18, and the line connecting the centers of these 18 lifting holes 602 forms a regular octagon. The multi-sided cone 9 is coaxially detachably assembled on the tooling mandrel 10 and lies horizontally on the bottom support block, that is, after the multi-sided cone 9 is stably supported on the bottom support block, its central axis is parallel to the horizontal plane. The tooling mandrel 10 simulates the mandrel of the core cone assembly mentioned in the background technology, and its matching relationship with the multi-sided cone 9 is consistent with the matching relationship between the mandrel of the core cone assembly and the multi-sided cone 9, but the tooling mandrel 10 is part of the grinding and matching device, and its length is shorter than the mandrel of the core cone assembly to reduce costs. The indexing fixture 6 is coaxially and detachably installed at both ends of the fixture mandrel 10, and the polygonal cone 9 is located between the indexing fixtures 6 at both ends, that is, two indexing fixtures 6 are installed on the fixture mandrel 10, and the polygonal cone 9 is located between the two indexing fixtures 6. Relatively speaking, one of the indexing fixtures 6 is arranged closer to the large end of the polygonal cone 9, and the other indexing fixture 6 is arranged closer to the small end of the polygonal cone 9. The hoisting holes 602 of the indexing fixture 6 are aligned with the sliding surface 901A of the polygonal cone 9, that is, each sliding surface 901A corresponds to a hoisting hole 602 on a large end side and a hoisting hole 602 on a small end side. By synchronously lifting the polygonal cone 9 at the corresponding hoisting holes 602 on the large end side and the small end side, the polygonal cone 9 can be quickly converted to a position through torque balance, and the sliding surface 901A to be ground and matched is automatically converted to a predetermined position. The position adjustment of the sliding surface 901A to be ground is fast and efficient, and because the ground position of each sliding surface 901A can be accurately converted to the predetermined work station, the problem of uneven contact of the sliding surface caused by the angle division error of the polygonal cone 9 is avoided, the work efficiency is improved, and the smooth production is ensured. The hoist 1 is erected on the large end side of the polygonal cone 9; the ground bevel block 4 is freely set on the current ground sliding surface 901A of the polygonal cone 9; the end of the traction rope 2 of the hoist 1 is connected to the ground bevel block 4, and the ground bevel block 4 is pulled to move at a constant speed along the current ground sliding surface 901A, and the traction rope 2 is parallel to the sliding surface where the ground bevel block 4 is located, which ensures that the ground bevel block 4 is pulled by the traction rope 2. The sliding surface 901A is ground uniformly along the axial direction. Compared with manual grounding, it is more efficient, eliminates the influence of human factors, and has better grounding uniformity.

[0030] In order to control the straight-line movement of the lapping inclined block 4 during lapping and prevent it from tilting to both sides of the current lapping sliding surface 901A, a limiting structure is provided on both sides of the current lapping sliding surface 901A.

[0031] The limiting structure can take various forms. For example, along the extension direction of the current lapping sliding surface 901A, a through-length baffle is provided on both sides of the current lapping sliding surface 901A; or a guide rail parallel to the current lapping sliding surface 901A is erected on the top of the current lapping sliding surface 901A, and the top end of the lapping inclined block 4 is connected to the guide rail through a connecting rod, and the connecting rod is slidably matched with the guide rail, etc. In this embodiment, the limiting structure includes several limiting blocks 3 spaced along the extension direction of the current lapping sliding surface 901A. An adjusting screw is installed on each limiting block 3, and the end of the adjusting screw abuts against the side surface of the lapping inclined block 4. The straight-line distance enclosed by three adjacent limiting blocks 3 is less than the length of the lapping inclined block 4, so that no matter where the lapping inclined block 4 moves, at least two limiting blocks 3 limit the lapping inclined block 4. The straight-line distance enclosed by three adjacent limiting blocks 3 refers to the straight-line distance enclosed by the limiting parts of three adjacent limiting blocks 3, and is also the direct distance formed by three adjusting screws. This structure is simple and convenient to install, and the limiting blocks 3 can be directly installed using the original threaded mounting holes on the sliding surface 901A.

[0032] If a single bottom support block is used to lift the middle part of the multi-edge cone 9, the stability is difficult to guarantee; if three or more bottom support blocks are used for lifting, materials will be wasted. In order to balance the support stability and save materials, the bottom support block includes a support block one 7 at the bottom of the multi-edge cone 9 and a support block two 8 that supports the bottom of the tooling mandrel 10. Both the support block one 7 and the support block two 8 are V-shaped blocks.

[0033] The winch 1 is supported on the support 5. The support 5 is arranged near the large end of the multi-edge cone 9 and is located on the extension line of the axis of the multi-edge cone 9. The support 5 can be formed by stacking square boxes, which can make use of local materials and has a low cost.

[0034] Preferably, as Figure 2 、 Figure 3 and Figure 4As shown in the figure, concave keyways 10A are provided at the end faces of both ends of the tooling mandrel 10, and both ends of the keyways 10A penetrate radially along the end face of the tooling mandrel 10; the indexing disc 601 includes a large disc 601A and a small disc 601C; the large disc 601A is a ring with a central circular hole 601B, and the central circular hole 601B is adapted to the tooling mandrel 10; a convex block 601D extending along the diameter direction is provided on one side of the small disc 601C; the convex block 601D is inserted into the central circular hole 601B and is adapted to the keyway 10A at the end of the tooling mandrel 10; the large disc 601A is bolted to the small disc 601C, and the large disc 601A is sleeved on the tooling mandrel 10, and the convex block 601D of the small disc 601C is inserted into the keyway 10A of the tooling mandrel 10; a lifting ring 603 is fixed on the other side of the small disc 601C opposite to the large disc 601A; the lifting hole 602 is provided on the part of the large disc 601A exposed outside the small disc 601C. For the indexing disc 601 with this structure, after it is assembled with the tooling mandrel 10, the large disc 601A is sleeved on the outer peripheral surface of the tooling mandrel 10. When the lifting ring is screwed into the lifting hole 602 for lifting, not only is the convex block 601D of the small disc 601C inserted into the keyway 10A of the tooling mandrel 10 for limiting, but also the inner wall of the large disc 601A is used to limit the outer peripheral surface of the tooling mandrel 10, improving the lifting stability and effectively preventing the indexing disc 601 from slipping off the tooling mandrel 10. The setting of the lifting ring 603 facilitates the assembly of the indexing disc 601 and the tooling mandrel 10 by lifting.

[0035] The lapping method for the sliding surface of a large multi-edged cone includes the following steps:

[0036] Step 1: Horizontally support the whole formed by assembling the multi-edged cone 9 on the tooling mandrel 10 on the bottom support block; fasten the indexing tooling device 6 at both ends of the tooling mandrel 10, and the indexing disc 601 of the indexing tooling device 6 is coaxial with the tooling mandrel 10.

[0037] Step 2: Pad a support 5 on the extension line of the axis at the large end of the multi-edged cone 9, and place the winch 1 on the support 5; adjust the installation height of the winch 1 so that the traction rope 2 is parallel to the sliding surface 901A to be lapped at the predetermined working position during traction.

[0038] Step 3: Adjust the sliding surface 901A to be lapped to the predetermined working position as the current lapping sliding surface 901A through the indexing tooling device 6; and install limiting structures on both sides of the current lapping sliding surface 901A. The constraint accuracy of the limiting structure needs to reach 0.05 mm / m, that is, when the lapping wedge 4 advances 1 meter, the maximum distance from its longitudinal center line deviating from the current lapping sliding surface 901A is 0.05 mm.

[0039] To enable rotation by hoisting with the indexing tooling device 6, it is necessary to determine the magnitude of the tensile force T, the position of the tensile force r, the angle of rotation, etc. The specific process is as follows:

[0040] 1) Establish a coordinate system and determine the coordinates of each point:

[0041] Suppose the multi-edged pyramid 9 extends along the x-axis, the center of the left end face is at the origin O(0, 0, 0), the center of the right end face is at O ′ (L, 0, 0), the centroid is located at the midpoint C(L / 2, 0, 0) of the pyramid, the coordinates of the left end tensile force application point P1 are (0, rcosα, rsinα), and the coordinates of the right end tensile force application point P2 are (L, rcosα, rsinα). r is the radius of the circle where the tensile force application point is located; L is the length of the multi-edged pyramid 9.

[0042] 2) Determine the position vector and force vector of the tensile force:

[0043] (1) Calculate the position vector relative to the centroid

[0044]

[0045] (2) Define the force vector

[0046] F1 = F2 = (0, T, 0)

[0047] 3. Calculate the moment of each tensile force about the centroid:

[0048] (1) The left end moment τ1

[0049]

[0050] After expansion

[0051] τ1 = i(rsinα·T) - j(-L / 2·0) + k(-L / 2·T) = (Trsinα, 0, -LT / 2)

[0052] (2) The right end moment τ2

[0053]

[0054] After expansion

[0055] τ2 = i(rsinα·T) - j(L / 2·0) + k(-L / 2·T) = (Trsinα, 0, LT / 2)

[0056] (3) The total moment τ 总

[0057] τ 总 = τ1 + τ2 = (2Trsinα, 0, 0)

[0058] 4. Analyze the rotation conditions:

[0059] When there is a net torque about the x-axis, the core cone assembly can rotate. Through the above calculations, it can be known that the net torque is 2Trsinα. Therefore, it can be concluded that when the distance r from the pulling force application point to the center of the circle is not equal to 0 and the angle α is not equal to 0° or 180°, the vertical pulling force T will generate a net torque 2Trsinα about the x-axis, thus causing the core cone assembly to rotate.

[0060] 5. Determine the magnitude of the pulling force T, the value of the pulling force position r, and the rotation angle α according to the structure of the core cone assembly:

[0061] For the multi-edge cone 9 with a regular octadecagon outer surface, that is, when there are 18 sliding surfaces to be lapped, the outer circular surface of the multi-edge cone 9 needs to be discretized into a quasi-regular octadecagon (that is, the centers of the lifting holes are connected to form a regular octadecagon), and the angle between adjacent sliding surfaces is 20°; in addition, since the multi-edge cone 9 is in a static equilibrium state during hoisting, the value of T is equal to half of the gravity of the multi-edge cone 9; according to the actual size of the tooling mandrel, to facilitate the screwing of the lifting hole into the eyebolt and considering its strength compliance, the lifting hole positions are set on a circle with a certain diameter, and 18 lifting holes are evenly distributed. In summary, 18 lifting holes need to be set on the hoisting and rotating tooling, the interval between adjacent lifting holes is 20°, and the lifting hole positions are set on a circle with a certain diameter.

[0062] Step 4: Hoist the lapping block 4 to the lower limit position of the current lapping sliding surface 901A.

[0063] Step 5: Connect the end of the traction rope 2 of the winch 1 to the lapping block 4, start the winch 1 to pull the lapping block 4 to move slowly and uniformly upward along the current lapping sliding surface 901A. After moving to the upper limit position, release the traction force on the lapping block 4 to make the lapping block 4 slide freely along the current lapping sliding surface 901A. That is, during the forward journey, the lapping block 4 is pulled by the winch 1 for lapping, and during the return journey, relying on the self-weight of the lapping block 4 to fall naturally, the reverse lapping is realized through the conversion of gravitational potential energy.

[0064] During the forward journey, the lapping block 4 moves at a constant speed to form consistent scraping marks on the sliding surface 901A, reducing the surface roughness difference; it can also make the contact spots on the mating surface distributed evenly, reducing local wear.

[0065] During the return journey, relying on the self-weight of the lapping block 4 to fall naturally, it has the same contact pressure as that during the forward journey. When moving at a constant speed during the forward journey, a scratch in one direction will be formed. During the return journey, using the same conditions as the forward journey (self-weight at a constant speed), the scratch during the forward journey can be corrected, further improving the surface roughness quality.

[0066] It should be noted that during the return journey, the lapping block 4 slides uniformly along the sliding surface 901A under its own weight.

[0067] Step 6: Remove the grinding bevel block 4 from the current grinding mating surface 901A, and repeat Steps 3 to 5 to complete the grinding of the next mating surface 901A.

[0068] Further, before Step 3, pair and mark the lifting holes 602 of the indexing tooling device 6 at the large end of the multi-edged pyramid 9, the lifting holes 602 of the indexing tooling device 6 at the small end, and the mating surface 901A, so that the three establish a unique corresponding relationship. Taking the regular octadecagonal pyramid with 18 mating surfaces as an example, the lifting holes 602 of the indexing tooling device 6 at its large end are sequentially numbered 1#, 2#, 3#... 17#, 18#, and the lifting holes 602 of the indexing tooling device 6 at the small end are sequentially numbered 1'#, 2'#, 3'#... 17'#, 18#; the mating surfaces 901A are sequentially numbered 1#, 2#, 3#... 17#, 18#. The 1# lifting hole 602 is aligned with the 1'# lifting hole 602 and is centered on the 1# mating surface 901A at the same time; the 2# lifting hole 602 is aligned with the 2'# lifting hole 602 and is centered on the 2# mating surface 901A at the same time. The relationship between the remaining lifting holes 602 and the mating surfaces 901A is the same. In this way, a unique corresponding relationship between the lifting holes 602 and the mating surfaces 901A is established, ensuring that after each mating surface 901A is adjusted to the working position, its position remains consistent, eliminating the influence of position error on the consistency of the grinding quality of each mating surface 901A. At the same time, during grinding, it can start from the 1# mating surface 901A. The clear numbering can effectively avoid missing or repeating the grinding of the mating surface 901A. When numbering, a laser marking machine can be used for marking.

[0069] The lifting holes 602 of the indexing tooling device 6 at the large end of the multi-edged pyramid 9 and the lifting holes 602 of the indexing tooling device 6 at the small end are respectively centered on the axial center line of the mating surface 901A. The plane formed by the axial center line of the mating surface 901A and the central axis of the multi-edged pyramid 9 vertically bisects the mating surface 901A.

[0070] In this way, when the multi-edged pyramid 9 is lifted by double lifting points, the current grinding mating surface 901A will be directly above, which can further ensure the uniformity of grinding.

[0071] The specific adjustment process in Step 3 is as follows: The lifting holes 602 of the indexing tooling device 6 at the large end of the multi-edged pyramid 9 corresponding to the mating surface 901A to be ground and the lifting holes 602 of the indexing tooling device 6 at the small end are used as lifting points to lift the large multi-edged pyramid 9 synchronously. Lift the large multi-edged pyramid 9 to an appropriate height from the reference surface, and after automatic alignment is achieved through moment balance, lower it to the bottom support block and fix it.

[0072] In the description of this specification, it should be noted that, unless otherwise clearly specified or limited, terms such as "installation", "equipped with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0073] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Research and matching device for sliding surface of large multi-edged pyramid, characterized in that: It includes a winch (1), a lapping inclined block (4), a indexing tooling device (6), a bottom supporting block and a tooling mandrel (10); The indexing tooling device (6) includes an indexing disc (601), and a plurality of hoisting holes (602) are evenly distributed on the concentric circumference of the indexing disc (601), and the number of the hoisting holes (602) is equal to the number of edges of the multi-edge pyramid (9); The multi-edge pyramid (9) is coaxially and detachably assembled on the tooling mandrel (10) and lies horizontally on the bottom supporting block; One of the indexing tooling devices (6) is coaxially and detachably installed at each end of the tooling mandrel (10), and the hoisting hole (602) of the indexing tooling device (6) is aligned with the sliding surface (901A) of the multi-edge pyramid (9); The winch (1) is erected on the large-end side of the multi-edge pyramid (9); The lapping inclined block (4) is freely arranged on the current lapping sliding surface (901A) of the multi-edge pyramid (9); The end of the towing rope (2) of the winch (1) is connected to the lapping inclined block (4) to tow the lapping inclined block (4) to move uniformly along the current lapping sliding surface (901A), and the towing rope (2) is parallel to the sliding surface where the lapping inclined block (4) is located.

2. The lapping device for the sliding surface of a large multi-edged cone as described in claim 1, characterized in that: Limit structures are arranged on both sides of the current lapping sliding surface (901A).

3. The lapping device for the sliding surface of a large multi-edged cone as described in claim 2, characterized in that: The limit structure includes several limit blocks (3) spaced along the extending direction of the current lapping sliding surface (901A), and the distance enclosed by adjacent three limit blocks (3) is less than the length of the lapping inclined block (4).

4. The lapping device for the sliding surface of a large multi-edged cone as claimed in claim 1, 2 or 3, characterized in that: The bottom supporting block includes a supporting block one (7) supporting at the bottom of the multi-edge pyramid (9) and a supporting block two (8) supporting at the bottom of the tooling mandrel (10), and both the supporting block one (7) and the supporting block two (8) are V-shaped blocks.

5. The lapping device for the sliding surface of a large multi-edged cone as claimed in claim 1, 2 or 3, characterized in that: The winch (1) is supported on a support (5), and the support (5) is arranged near the large end of the multi-edge pyramid (9) and is located on the extension line of the axis of the multi-edge pyramid (9).

6. The lapping device for the sliding surface of a large multi-edged cone as described in claim 1, 2 or 3, characterized in that: Concave key grooves (10A) are arranged on the end faces at both ends of the tooling mandrel (10), and both ends of the key grooves (10A) penetrate radially along the end faces of the tooling mandrel (10); The indexing disc (601) includes a large disc (601A) and a small disc (601C); The large disc (601A) is a ring with a central circular hole (601B), and the central circular hole (601B) is adapted to the tooling mandrel (10); One side of the small disc (601C) is provided with a convex block (601D) extending along its diameter direction; The convex block (601D) is inserted into the central circular hole (601B) and is adapted to the key groove (10A) at the end of the tooling mandrel (10); The large disc (601A) is bolted to the small disc (601C), and the large disc (601A) is sleeved on the tooling mandrel (10), and the convex block (601D) of the small disc (601C) is inserted into the key groove (10A) of the tooling mandrel (10); A hoisting ring (603) is fixed on the other side of the small disc (601C) opposite to the large disc (601A); The hoisting hole (602) is arranged on the part of the large disc (601A) exposed outside the small disc (601C).

7. A method for grinding and fitting the sliding surface of a large multi-edge cone using the grinding and fitting device for the sliding surface of a large multi-edge cone according to any one of claims 1-3, characterized in that: It includes the following steps: Step 1: The overall formed by assembling the multi-edged pyramid (9) onto the tooling mandrel (10) is horizontally supported on the bottom support block; the indexing tooling device (6) is fastened to both ends of the tooling mandrel (10), and the indexing disc (601) of the indexing tooling device (6) is coaxial with the tooling mandrel (10). Step 2: A support (5) is padded on the extension line of the axis at the large end of the multi-edged pyramid (9), and the winch (1) is placed on the support (5); the installation height of the winch (1) is adjusted so that the towing rope (2) is parallel to the sliding surface to be ground and matched (901A) at the predetermined working position during towing. Step 3: The sliding surface to be ground and matched (901A) is adjusted to the predetermined working position through the indexing tooling device (6) as the current sliding surface to be ground and matched (901A); and limit structures are installed on both sides of the current sliding surface to be ground and matched (901A). Step 4: The grinding and matching inclined block (4) is hoisted to the lower limit position of the current sliding surface to be ground and matched (901A). Step 5: The end of the towing rope (2) of the winch (1) is connected to the grinding and matching inclined block (4), and the winch (1) is started to tow the grinding and matching inclined block (4) to slowly and uniformly move upward along the current sliding surface to be ground and matched (901A). After moving to the upper limit position, the traction force on the grinding and matching inclined block (4) is released, so that the grinding and matching inclined block (4) freely slides down along the current sliding surface to be ground and matched (901A). Step 6: The grinding and matching inclined block (4) is removed from the current sliding surface to be ground and matched (901A), and steps 3 to 5 are repeated to complete the grinding and matching of the next sliding surface (901A).

8. The lapping method for the sliding surface of a large multi-edged cone as claimed in claim 7, wherein: Before step 3, the hoisting holes (602) of the indexing tooling device (6) at the large end of the multi-edged pyramid (9), the hoisting holes (602) of the indexing tooling device (6) at the small end, and the sliding surface (901A) are paired and marked to establish a unique corresponding relationship among the three.

9. The method for lapping the sliding surface of a large multi-edged cone as claimed in claim 7, characterized in that: The hoisting holes (602) of the indexing tooling device (6) at the large end of the multi-edged pyramid (9) and the hoisting holes (602) of the indexing tooling device (6) at the small end are respectively centered on the axial midline (901B) of the sliding surface (901A).

10. The lapping method for the sliding surface of a large multi-edged cone as described in claim 7, characterized in that: In step 3, the hoisting holes (602) of the indexing tooling device (6) at the large end of the multi-edged pyramid (9) and the hoisting holes (602) of the indexing tooling device (6) at the small end corresponding to the sliding surface to be ground and matched (901A) are used as lifting points to lift the large multi-edged pyramid (9) to an appropriate height above the reference surface. After automatic alignment is achieved through moment balance, it is lowered to the bottom support block for fixation.

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