Double end surface grinding machine

Abstract

The present invention provides a double-end surface grinder, belonging to the technical field of double-end surface grinders. It comprises a grinder body, on which a second grinding disc structure is installed, and a first grinding disc structure is installed above the grinder body close to the second grinding disc structure; the second grinding disc structure comprises a ring-shaped grinding disc fixedly connected to the grinder body, and an outer tooth column ring is rotatably connected at the edge of the grinding disc. The present invention sets a mold structure and a workpiece limiting structure, and the workpiece mold plate directly integrates the original multiple small mold plates into a whole. When working, the placement of the workpiece mold plate is more convenient, and with the workpiece limiting structure, it can adapt to various sizes of round and square workpieces. There is no need to manufacture a mold for the workpiece before each grinding, which saves a lot of time for manufacturing the mold. In the long run, it saves the material for each time to adapt the mold to the workpiece, and there is no need to save a large number of molds, which saves the time for subsequent search for suitable molds.

Description

Technical Field

[0001] The invention relates to the technical field of double-end surface grinders, in particular to a double-end surface grinder. Background Art

[0002] Double-end surface grinder is a highly efficient plane processing machine tool, which can grind two parallel end surfaces at the same time in one processing process. It can be divided into horizontal and vertical types according to the structure, and can be divided into through-type, turntable type and reciprocating type according to the feeding method. Double-end surface grinder is widely used in many industries such as automobiles, bearings, and magnetic materials due to its high precision and high production efficiency. It is suitable for processing products of various materials such as piston pins, piston rings, valve gaskets, connecting rods, cross shafts, valve plates, forks, hydraulic pump blades, rotors, stators, compressor vanes, inner and outer rings and rollers of bearings, magnetic rings, magnetic steel sheets, graphite plates, etc.

[0003] Existing double-end surface grinders require molds that are adapted to the workpiece to limit the workpiece to be grinded, and drive the workpiece to be grinded to rotate and grind on the upper and lower grinding discs. Therefore, different workpieces require molds to be made specifically for the workpiece. In the long run, as the grinding work lasts longer, more molds are needed to manufacture the corresponding workpieces, resulting in serious waste of materials. In addition, the previously manufactured molds are all stored centrally, and the molds that need to be manufactured later need to waste time searching for them in the stored molds. Therefore, the present application provides a double-end surface grinder to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a double-end surface grinder to solve the problem that the existing double-end surface grinder needs to adapt to the mold of the workpiece to limit the workpiece to be grinded, and drive the workpiece to be grinded to rotate and grind on the upper and lower grinding discs. Therefore, different workpieces require molds to be made specifically for the workpiece. In the long run, as the grinding work lasts longer, more molds are needed to manufacture the corresponding workpieces, resulting in serious waste of materials. In addition, the molds manufactured previously are all stored together, and the molds that need to be manufactured later need to waste time looking for them in the stored molds.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A double-end surface grinder comprises a grinder body, a second grinding disc structure is installed on the grinder body, and a first grinding disc structure is installed above the grinder body near the second grinding disc structure; the second grinding disc structure comprises a ring-shaped grinding disc fixedly connected to the grinder body, an outer tooth column ring is rotatably connected at the edge of the grinding disc, and an inner tooth column ring is arranged at the center of the grinding disc; a mold structure is located on the surface of the grinding disc, and the mold structure is connected to the grinding disc, the mold structure is used to limit the workpiece placed on the mold structure, and the workpiece on the mold structure is polished by the cooperation of the second grinding disc structure and the first grinding disc structure; the mold structure comprises A workpiece mold disk is placed on the grinding disk, and a rotating slot is opened at the center position of the workpiece mold disk. Four groups of first gears are fixedly connected to the inner wall of the rotating slot, and the first gear teeth are meshingly connected to the inner gear column ring. The outer wall of the workpiece mold disk is fixedly connected to the second gear, and the second gear is meshingly connected to the outer gear column ring; a workpiece limiting structure is located on the mold structure, and the workpiece limiting structure is connected to the mold structure. The workpiece limiting structure includes a fixed ring fixedly connected to the workpiece mold disk, and the inner surface wall of the fixed ring is rotatably connected to a moving ring, and the inner surface wall of the moving ring is connected to four limiting units, and every two adjacent limiting units are distributed at 90°.

[0007] Optionally, one side of the workpiece mold is provided with four workpiece placement grooves that penetrate through it, and the four workpiece placement grooves are connected to the rotating slot. A first mounting groove is provided on the inner surface wall of the workpiece placement groove. Both sides of the workpiece mold close to the workpiece placement groove are provided with limiting grooves and adjustment grooves that are connected to the first mounting groove. The limiting grooves and the adjustment grooves are symmetrically distributed on both sides of the workpiece placement groove, and corresponding ratchets are provided on both sides of the adjustment groove.

[0008] Optionally, every two adjacent workpiece placement grooves are arranged at 90° to each other; a preparation sheet groove is provided on the workpiece mold near every two workpiece placement grooves, and every two adjacent preparation sheet grooves are arranged at 90° to each other, and a preparation sheet is placed on the preparation sheet groove.

[0009] Optionally, one side of the movable ring is fixedly connected with mutually symmetrical guide strips and limit strips, the guide strips and limit strips respectively correspond to the positions of the first mounting groove and the adjustment groove, and the guide strips and limit strips respectively penetrate the first mounting groove and the adjustment groove and extend to one side of the workpiece mold plate, and the shapes of the guide strips and the limit strips are consistent; it also includes a first rotating structure for the movable ring to rotate on the fixed ring and a second rotating structure for driving the limit unit to rotate through the rotation of the movable ring.

[0010] Optionally, a second mounting groove is provided through the limit strip and in parallel with the top of the moving ring, an expansion groove communicating with the second mounting groove is provided on the top of the limit strip, and a backstop unit is installed in the second mounting groove.

[0011] Optionally, the back-stop unit includes a second rotating shaft rotatably connected to the surface wall of the second mounting groove, the outer wall of the second rotating shaft is rotatably connected to a first clamping block, an embedding groove is provided on the first clamping block, and the first clamping block is a U-shaped structure, the outer wall of the second rotating shaft is rotatably connected to a second clamping block near the first clamping block, a connecting rod is fixedly connected to a side of the first clamping block close to the second clamping block, a card is fixedly connected to a position corresponding to the connecting rod, the card is an elastic structure with both ends turned outward, the connecting rod and the card are clamped to each other, and the first clamping block and the second clamping block are respectively clamped to the ratchet on both sides of the adjustment groove.

[0012] Optionally, the first rotating structure includes a semicircular groove formed on the inner surface wall of the fixed ring, and the outer surface wall of the movable ring is fixedly connected with a semicircular ring that matches the semicircular groove.

[0013] Optionally, the limiting unit includes a first rotating shaft rotatably connected to the surface wall of the first mounting groove, the outer wall of the first rotating shaft is fixedly connected with an arc strip, the arc strip is provided with a plurality of evenly distributed lightweight holes, and the end of the arc strip away from the first rotating shaft is provided with a right-angled workpiece positioning opening, and the second extrusion plate and the first extrusion plate are respectively fixedly connected at both ends of one side of the arc strip close to the workpiece positioning opening.

[0014] Optionally, the second rotating structure includes a rotating gear fixedly connected to one end of the arc-shaped bar close to the first rotating shaft, and the rotating gear is adaptively meshed and connected with the inner surface wall of the moving ring.

[0015] Optionally, the second extruded sheet is an elastic sheet structure with a thickness gradually changing from thick to thin from the middle to both ends, and the first extruded sheet is an elastic sheet structure with a convex middle and concave sides.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In the above scheme, by setting the mold structure and the workpiece limiting structure, the workpiece mold plate directly integrates the original multiple small mold plates into a whole. During operation, the placement of the workpiece mold plate is more convenient. With the workpiece limiting structure, it can adapt to various sizes of round and square workpieces. There is no need to manufacture molds for the workpieces before each polishing, which saves a lot of time in manufacturing molds. In the long run, it saves materials for each time the mold is adapted to the workpiece, and there is no need to save a large number of molds, which saves time in finding suitable molds later. The workpiece limiting structure is used to adapt and limit round and square workpieces of different sizes, so that it is suitable for workpieces of multiple sizes.

[0018] By setting up a preparatory sheet, the preparatory sheet is a detachable structure and can be used for workpieces of various shapes. By adapting the grooving method, grooves can be made on the preparatory sheet, and the grooves made by the preparatory sheet limit the workpiece, thereby realizing the grinding of workpieces of various shapes.

[0019] By setting a stop unit, the stop unit is used to limit and fix the movable ring with an adjusted position, so that when the limit unit limits the workpiece to be polished, the workpiece will not be unable to be limited and will not be displaced significantly within the four limit units. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of a double-end surface grinder;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the second grinding disc structure, the mold structure and the workpiece limiting structure;

[0023] Figure 3 It is a schematic diagram of the exploded three-dimensional structure of the second grinding disc structure, the mold structure and the workpiece limiting structure;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the mold structure;

[0025] Figure 5 for Figure 4 Schematic diagram of the three-dimensional structure at A in the middle;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the workpiece limiting structure;

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the fixed ring and the moving ring;

[0028] Figure 8 for Figure 7 Schematic diagram of the three-dimensional structure at B in the middle;

[0029] Fig. 9 A schematic diagram of the three-dimensional structure of the anti-retraction unit;

[0030] Fig.10 Schematic diagram of the three-dimensional structure of the limiting unit;

[0031] Fig.11 for Fig.10 Schematic diagram of the three-dimensional enlarged structure at point C in the middle.

[0032] Reference numerals:

[0033] 1. Grinding machine body; 2. First grinding disc structure; 3. Second grinding disc structure; 31. Grinding disc; 32. Outer tooth column ring; 33. Inner tooth column ring; 4. Mold structure; 41. Workpiece mold plate; 42. Rotating card slot; 43. Workpiece placement slot; 44. First installation slot; 45. Limiting slot; 46. Adjusting slot; 461. Ratchet; 47. Preparatory sheet slot; 5. Workpiece limiting structure; 51. Fixed ring; 511. Semicircular groove; 52. Moving ring; 521. Semicircular ring; 522. Guide Strip; 523, limit strip; 524, second installation slot; 525, expansion slot; 53, limit unit; 531, arc strip; 532, lightweight hole; 533, first rotating shaft; 534, rotating gear; 535, workpiece positioning port; 536, first extrusion sheet; 537, second extrusion sheet; 6, preparatory sheet; 7, stop unit; 71, first clamping block; 711, embedded slot; 712, connecting rod; 72, second clamping block; 721, card; 73, second rotating shaft.

[0034] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0035] The following is a detailed description of a double-end surface grinder provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0036] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0037] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0038] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0039] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0040] like Figures 1 to 11As shown, an embodiment of the present invention provides a double-end surface grinder, including a grinder body 1, a second grinding disc structure 3 is installed on the grinder body 1, and a first grinding disc structure 2 is installed above the grinder body 1 near the second grinding disc structure 3, the grinder body 1, the first grinding disc structure 2 and the second grinding disc structure 3 are all prior arts; the second grinding disc structure 3 includes a ring-shaped grinding disc 31 fixedly connected to the grinder body 1, an outer tooth column ring 32 is rotatably connected at the edge position of the grinding disc 31, and an inner tooth column ring 33 is arranged at the center position of the grinding disc 31, and a driving device is arranged inside the grinder body 1, and the inner tooth column ring 33 is driven to rotate by the driving device, and the inner tooth column ring 33 is transmission-connected to the outer tooth column ring 32, so when the driving device starts to work, the inner tooth column ring 33 and the outer tooth column ring 32 rotate synchronously, thereby driving the mold structure 4 placed on the grinding disc 31 to rotate.

[0041] The mold structure 4 is located on the surface of the grinding disc 31, and the mold structure is connected to the grinding disc. The mold structure 4 is used to limit the workpiece placed on the mold structure 4, and the workpiece on the mold structure 4 is polished by the cooperation of the second grinding disc structure 3 and the first grinding disc structure 2;

[0042] The workpiece limiting structure 5 is located on the mold structure 4 and is connected to the mold structure. The workpiece limiting structure 5 is used to adapt and adjust the limiting of circular and square workpieces of different sizes, so that it is suitable for workpieces of multiple sizes.

[0043] When it is necessary to grind the workpiece, the workpiece limiting structure 5 is adjusted according to the size of the round workpiece or the square workpiece, so that the workpiece limiting structure 5 is adapted to the workpiece to be grinded, thereby limiting the workpiece to be grinded. After the adjustment of the workpiece limiting structure 5 is completed, the entire mold structure 4 is placed on the grinding wheel 31, and is engaged with the inner tooth column ring 33 and the outer tooth column ring 32. After the mold structure 4 is placed, the workpiece to be grinded is placed in the adjusted workpiece limiting structure 5, and the workpiece to be grinded is ground by the first grinding wheel structure 2 and the second grinding wheel structure 3.

[0044] like Figures 3 to 5As shown, the mold structure 4 includes a workpiece mold plate 41 placed on the grinding disc 31, the diameter of the workpiece mold plate 41 is slightly larger than the diameter of the grinding disc 31, so that the edge position of the entire workpiece mold plate 41 is just stuck on the outer tooth column ring 32, and a rotation slot 42 is opened at the center position of the workpiece mold plate 41, and the diameter of the rotation slot 42 is slightly larger than the diameter of the inner tooth column ring 33, so that the entire workpiece mold plate 41 can be sleeved on the inner tooth column ring 33, and the inner wall of the rotation slot 42 is fixedly connected with four groups of first gears, and the first gear teeth are meshed with the inner tooth column ring 33. The outer wall of the workpiece mold plate 41 is fixedly connected with a second gear, and the second gear is meshed with the outer tooth column ring 32. When the workpiece mold plate 41 is placed, the rotation of the workpiece mold plate 41 is The slot 42 is aligned with the inner tooth column ring 33 and lowered so that the four groups of first gears on the rotating slot 42 are inserted between the tooth columns of the inner tooth column ring 33, and then the position of the workpiece mold plate 41 is finely adjusted so that the second gear is inserted between the tooth columns of the outer tooth column ring 32; one side of the workpiece mold plate 41 is provided with four workpiece placement grooves 43 that penetrate through, and the workpiece placement grooves 43 are used to place the workpieces to be polished, and the four workpiece placement grooves 43 are connected with the rotating slot 42, and the inner surface wall of the workpiece placement groove 43 is provided with a first installation groove 44, and the first installation groove 44 is used to provide an installation space for the workpiece limiting structure 5, and the workpiece mold plate 41 is provided with a limiting groove 45 and an adjustment groove that are connected with the first installation groove 44 on both sides of the workpiece mold plate 41 close to the workpiece placement groove 43. 46, corresponding ratchet teeth 461 are provided on both sides of the adjusting groove 46, the limiting groove 45 is used to guide the workpiece limiting structure 5 installed in the first installation groove 44, and the adjusting groove 46 is used to provide space for adjusting the workpiece limiting structure 5, so that the staff can adjust the workpiece limiting structure 5 on the adjusting groove 46, and the four workpiece placement grooves 43 are distributed at 90° to each other, and the limiting grooves 45 and the adjusting grooves 46 are symmetrically distributed on both sides of the workpiece placement groove 43; the workpiece mold plate 41 is provided with a preparation plate groove 47 between every two workpiece placement grooves 43, and the four preparation plate grooves 47 are distributed at 90° to each other, and a preparation plate 6 is placed on the preparation plate groove, and the preparation plate 6 is a detachable structure. Different workpieces can be used by making grooves on the preparation sheet 6 through an adaptive groove method. The grooves made on the preparation sheet 6 limit the workpiece, thereby realizing the grinding of workpieces of different shapes. The thickness of the workpiece mold plate 41 is less than the thickness of the workpiece. The workpiece mold plate 41 directly integrates the original multiple small mold plates into a whole. When working, the placement of the workpiece mold plate 41 is more convenient, and with the workpiece limiting structure 5, it can be adapted to various sizes of round and square workpieces. There is no need to manufacture a mold for the workpiece before each grinding, which saves a lot of time for manufacturing the mold. In the long run, it saves materials for each time the mold is adapted to the workpiece, and there is no need to save a large number of molds, which saves time in finding a suitable mold later.

[0045] like Figure 3 and Figures 6 to 8 As shown, the workpiece limiting structure 5 includes a fixed ring 51 fixedly connected to the inner wall of the first mounting groove 44, the fixed ring 51 is fixed to the inner wall of the first mounting groove 44, and is used to provide a rotation track for the movable ring 52, the inner surface wall of the fixed ring 51 is rotatably connected with the movable ring 52, the movable ring 52 is used to adjust the limiting unit 53, and the rotation of the movable ring 52 drives the rotation of the limiting unit 53, and the inner surface wall of the first mounting groove 44 near the movable ring 52 is connected with four limiting units 53 distributed at 90 degrees to each other, and the four limiting units 53 are used to limit the workpiece to be polished. In the initial position, the four limiting units The elements 53 are arranged in a ring shape, so the maximum size of the workpiece limited by the workpiece limiting structure 5 is the size of the inner ring of the ring formed by the four limiting units 53; one side of the moving ring 52 is fixedly connected with a mutually symmetrical guide bar 522 and a limiting bar 523, and the guide bar 522 and the limiting bar 523 correspond to the positions of the first installation groove 44 and the adjustment groove 46 respectively, and the guide bar 522 and the limiting bar 523 respectively penetrate the first installation groove 44 and the adjustment groove 46 and extend to one side of the workpiece mold plate 41, and the guide bar 522 and the limiting bar 523 have the same shape, and the guide bar 522 and the limiting bar 523 are arranged from the first installation groove 44 to the adjustment groove 46. The first installation groove 44 and the adjusting groove 46 extend out, and the first is to limit the position of the moving ring 52, so that the moving ring 52 is always in contact with the fixed ring 51. When the staff needs to adjust the limiting unit 53, the guide strip 522 and the limiting strip 523 extending from the first installation groove 44 and the adjusting groove 46 are rotated to drive the moving ring 52 to rotate on the fixed ring 51. The rotating moving ring 52 drives the limiting unit 53 to rotate through the gear teeth on the inner surface wall; it also includes a first rotating structure for the moving ring 52 to rotate on the fixed ring 51 and a second rotating structure for driving the limiting unit 53 to rotate through the rotation of the moving ring 52. The limiting strip 523 and the moving ring 52 are connected to each other. A second mounting groove 524 is provided on the top of the ring 52 in parallel directions, and the second mounting groove 524 provides an installation space for the backstop unit 7. An extension groove 525 connected to the second mounting groove 524 is provided on the top of the limit strip 523, and the extension groove 525 is used to provide a space for the staff to operate the backstop unit 7. The backstop unit 7 is installed in the second mounting groove 524, and the backstop unit 7 is used to limit and fix the movable ring 52 with the adjusted position, so that when the limit unit 53 limits the workpiece to be polished, the workpiece will not be unable to be limited, and the workpiece will not be greatly displaced in the four limit units 53.

[0046] like Figure 8 and Fig. 9The first clamping block 71 is provided with an embedding groove 711, and the first clamping block 71 is of a U-shaped structure. The outer wall of the second rotating shaft 73 is rotatably connected with the second clamping block 72 near the first clamping block 71. A first torsion spring (not shown in the figure) is sleeved on the outer wall of one end of the second rotating shaft 73. One end of the first torsion spring is clamped on the surface wall of the second mounting groove 524, and the other end is clamped on one side of the first clamping block 71. A second torsion spring (not shown in the figure) is sleeved at the middle position of the second rotating shaft 73. One end of the second torsion spring is clamped on the surface wall of the second mounting groove 524, and the other end is clamped on one side of the first clamping block 71. Therefore, in the initial state, the first clamping block 71 is in an expanded state in the second mounting groove 524 and is clamped with the ratchet 461. When the locking cam 720 is in the closed position, the locking cam 720 will be in the closed position when the locking cam 720 is in the open position, so that the locking cam 720 can be turned to the unlocking position when the locking cam 720 is in the open position.

[0047] like Figure 7 and Fig.10 As shown, the first rotating structure includes a semicircular groove 511 opened on the inner surface wall of the fixed ring 51, and the semicircular groove 511 is used to limit the movable ring 52 so that the movable ring 52 is more stable during rotation. The outer wall of the movable ring 52 is fixedly connected with a semicircular ring 521 that is compatible with the semicircular groove 511. The second rotating structure includes a rotating gear 534 fixedly connected to one end of the arc strip 531 close to the first rotating shaft 533. When the movable ring 52 rotates, the rotating gear 534 is driven to rotate, thereby driving the arc strip 531 to rotate on the first rotating shaft 533. The rotating gear 534 is compatible and meshingly connected with the inner surface wall of the movable ring 52.

[0048] like Figure 6 , Figures 9 to 11As shown, the limiting unit 53 includes a first rotating shaft 533 rotatably connected to the surface wall of the first mounting groove 44, and the outer wall of the first rotating shaft 533 is fixedly connected with an arc-shaped bar 531, and a plurality of evenly distributed lightweight holes 532 are opened on the arc-shaped bar 531, and the lightweight holes 532 are used to increase the appearance and save materials, and a right-angled workpiece positioning opening 535 is opened at one end of the arc-shaped bar 531 away from the first rotating shaft 533. No matter how the limiting unit 53 is rotated, the workpiece positioning openings 535 on the four arc-shaped bars 531 are opposite to each other. Therefore, when the square workpiece is limited, the four workpiece positioning openings 535 can limit the four corners of the square workpiece, thereby limiting the entire square workpiece. The two ends of one side of the arc-shaped strip 531 close to the workpiece positioning opening 535 are respectively fixedly connected with a second extrusion sheet 537 and a first extrusion sheet 536. The second extrusion sheet 537 is an elastic sheet structure with a thickness gradually changing from thick to thin from the middle to the two ends, and the first extrusion sheet 536 is an elastic sheet structure with a convex middle and concave two sides. When the four arc-shaped strips 531 rotate, the top ends of the four arc-shaped strips 531 are also distributed in a circle. When the circular workpiece is fixed, the outer wall of the circular workpiece is limited and fixed by the inner walls of the top ends of the four arc-shaped strips 531. The first extrusion sheet 536 and the second extrusion sheet 537 can be deformed under the extrusion of the circular workpiece, and can effectively fit with the surface of the circular workpiece.

[0049] The working principle of the technical solution provided by the present invention is as follows: when it is necessary to grind the workpiece, the workpiece limiting structure 5 is adjusted according to the size of the circular workpiece or the square workpiece, and the staff rotates the guide strip 522 and the limiting strip 523 extending from the first mounting groove 44 and the adjusting groove 46 to drive the movable ring 52 to rotate on the fixed ring 51. When it is adjusted to a suitable position, the movable ring 52 is limited by the stop unit 7, and the rotating movable ring 52 drives the rotation of the limiting unit 53 through the gear teeth on the inner surface wall. No matter how the limiting unit 53 rotates, the workpiece positioning openings 535 on the four arc-shaped strips 531 are all opposite to each other. Therefore, when limiting the square workpiece, the four workpiece positioning openings 535 can limit the four corners of the square workpiece, thereby limiting the entire square workpiece. When limiting the circular workpiece, the outer wall of the circular workpiece is limited and fixed by the top inner walls of the four arc-shaped strips 531.

[0050] After adjusting the workpiece limiting structure 5, the entire mold structure 4 is placed on the grinding disc 31. When placing the workpiece mold disc 41, the rotating slot 42 of the workpiece mold disc 41 is aligned with the inner tooth column ring 33 and lowered, so that the four groups of first gears on the rotating slot 42 are inserted between the tooth columns of the inner tooth column ring 33, and then the position of the workpiece mold disc 41 is fine-tuned so that the second gear is inserted between the tooth columns of the outer tooth column ring 32. After the mold structure 4 is placed, the workpiece to be polished is placed in the adjusted workpiece limiting structure 5, and the workpiece to be polished is polished by the first grinding disc structure 2 and the second grinding disc structure 3.

[0051] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0052] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A double-end surface grinding machine, characterized in that: The invention comprises a grinding machine body, wherein a second grinding disc structure is installed on the grinding machine body, and a first grinding disc structure is installed above the grinding machine body close to the second grinding disc structure; The second grinding disc structure comprises a ring-shaped grinding disc fixedly connected to the grinding machine body, an outer tooth column ring is rotatably connected at the edge of the grinding disc, and an inner tooth column ring is arranged at the center of the grinding disc; A mold structure is located on the surface of the grinding disc and is connected to the grinding disc. The mold structure is used to limit the position of the workpiece placed on the mold structure, and the workpiece on the mold structure is polished by the cooperation of the second grinding disc structure and the first grinding disc structure; The mold structure includes a workpiece mold plate placed on the grinding disc, a rotating slot is opened at the center of the workpiece mold plate, four sets of first gears are fixedly connected to the inner wall of the rotating slot, the first gear teeth are meshed with the inner gear column ring, and the outer wall of the workpiece mold plate is fixedly connected to the second gear, which is meshed with the outer gear column ring; A workpiece limiting structure is located on the mold structure, and the workpiece limiting structure is connected to the mold structure; The workpiece limiting structure comprises a fixed ring fixedly connected to the workpiece die plate, the inner surface wall of the fixed ring is rotatably connected to a movable ring, the inner surface wall of the movable ring is connected to four limiting units, and every two adjacent limiting units are distributed at 90 degrees.

2. The double-end surface grinding machine according to claim 1, characterized in that: One side of the workpiece mold is provided with four workpiece placement grooves that penetrate through, and the four workpiece placement grooves are connected with the rotating clamping groove. The inner surface wall of the workpiece placement groove is provided with a first installation groove. Both sides of the workpiece mold close to the workpiece placement groove are provided with limiting grooves and adjustment grooves that are connected with the first installation groove. The limiting grooves and the adjustment grooves are symmetrically distributed on both sides of the workpiece placement groove, and corresponding ratchets are provided on both sides of the adjustment groove.

3. The double-end surface grinding machine according to claim 2, characterized in that: Every two adjacent workpiece placement grooves are distributed at 90 degrees; The workpiece mold plate is provided with a preparation sheet groove between each two of the workpiece placement grooves, and each two adjacent preparation sheet grooves are distributed at 90 degrees, and a preparation sheet is placed on the preparation sheet groove.

4. The double-end surface grinding machine according to claim 2, characterized in that: A guide bar and a limit bar symmetrical to each other are fixedly connected to one side of the moving ring, the guide bar and the limit bar respectively correspond to the positions of the first mounting groove and the adjustment groove, and the guide bar and the limit bar respectively penetrate the first mounting groove and the adjustment groove and extend to one side of the workpiece die plate, and the guide bar and the limit bar have the same shape; It also includes a first rotating structure for the movable ring to rotate on the fixed ring and a second rotating structure for driving the limiting unit to rotate by rotating the movable ring.

5. The double-end surface grinding machine according to claim 4, characterized in that: The limiting strip and the top of the moving ring are provided with a second mounting groove extending therethrough in parallel, the top of the limiting strip is provided with an expansion groove communicating with the second mounting groove, and a stop unit is installed in the second mounting groove.

6. The double-end surface grinding machine according to claim 5, characterized in that: The back-stop unit includes a second rotating shaft rotatably connected to the surface wall of the second mounting groove, the outer wall of the second rotating shaft is rotatably connected to a first clamping block, an embedding groove is provided on the first clamping block, and the first clamping block is a U-shaped structure, the outer wall of the second rotating shaft is rotatably connected to a second clamping block near the first clamping block, a connecting rod is fixedly connected to a side of the first clamping block near the second clamping block, a card is fixedly connected to a position corresponding to the connecting rod of the second clamping block, the card is an elastic structure with both ends turned outward, the connecting rod and the card are clamped to each other, and the first clamping block and the second clamping block are respectively clamped to the ratchet teeth on both sides of the adjusting groove.

7. The double-end surface grinding machine according to claim 4, characterized in that: The first rotating structure comprises a semicircular groove formed on the inner surface wall of the fixed ring, and the outer surface wall of the movable ring is fixedly connected with a semicircular ring matched with the semicircular groove.

8. The double-end surface grinding machine according to claim 4, characterized in that: The limiting unit includes a first rotating shaft rotatably connected to the surface wall of the first mounting groove, the outer wall of the first rotating shaft is fixedly connected with an arc strip, a plurality of evenly distributed lightweight holes are opened on the arc strip, and a right-angled workpiece positioning opening is opened at one end of the arc strip away from the first rotating shaft, and a second extrusion plate and a first extrusion plate are fixedly connected at both ends of one side of the arc strip close to the workpiece positioning opening.

9. The double-end surface grinding machine according to claim 8, characterized in that: The second rotating structure includes a rotating gear fixedly connected to one end of the arc-shaped bar close to the first rotating shaft, and the rotating gear is adaptively meshed and connected with the inner surface wall of the moving ring.

10. The double-end surface grinding machine according to claim 8, characterized in that: The second extruded sheet is an elastic sheet structure with a thickness gradually changing from thick to thin from the middle to the two ends, and the first extruded sheet is an elastic sheet structure with a convex middle and concave two sides.

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