A concentric positioning device of a crystal bar rounding jig

Abstract

A kind of concentric positioning device of crystal bar rounding clamp, including crystal bar positioning device, rounding clamp positioning device;Crystal bar positioning device includes first inclined rod, second inclined rod, third inclined rod and fourth inclined rod;Rounding clamp positioning device includes two height adjusting devices, height adjusting device includes fixed end and lifting end, fixed end is provided with positioning hole.The present application first utilizes crystal bar positioning device, rounding clamp positioning device to carry out positioning, so that the axis of crystal bar and the axis of rounding clamp are located in the same vertical plane, then utilizes height adjusting device to adjust the height of rounding clamp, so that the axis of rounding clamp and the axis of crystal bar are located in the same horizontal plane, to realize rounding clamp and crystal bar concentric bonding, simple operation, improve the concentricity of rounding clamp and crystal bar, reduce the uneven impact of grinding wheel to crystal bar, solve the swing problem of crystal bar in the process of rolling outside circle, reduce the grinding allowance of crystal bar, improve grinding efficiency.

Description

Technical Field

[0001] This invention relates to the field of machinery, and more particularly to crystal rod rounding processing technology, especially a concentric positioning device for a crystal rod rounding fixture. Background Technology

[0002] Soft and brittle crystals are crystalline materials with low hardness and poor impact resistance (generally less than 5 on the Mohs scale). They have wide applications in the optical field. Due to their unique physical properties, the processing of these crystals differs significantly from that of ordinary optical glass, easily leading to problems such as cracking, chipping, and corner breakage during adhesive bonding and actual processing. Taking the optical cold processing of calcium fluoride crystals, a typical soft and brittle material, as an example, some production processes include crystal growth, bulk orientation bonding, crystal rod extraction, end face grinding, and crystal rod rounding. The purpose of the crystal rod rounding process is to ensure that the radial dimension of the crystal rod reaches the required range, guaranteeing precise processing in subsequent steps. To reduce the uneven impact of the grinding wheel on the crystal rod, improve grinding efficiency, and reduce the grinding allowance, the rounding fixture and the crystal rod need to be bonded as concentrically as possible. The existing technology uses two rolling jigs bonded to the two end faces of the crystal rod. V-shaped brackets and pads are used to ensure that the rolling jigs are concentric with the crystal rod and that they are firmly bonded. However, in actual operation, due to the long operation time and the difficulty in fixing the crystal rod, rolling jigs and pads during bonding, it is not possible to ensure that the rolling jigs are concentric with the crystal rod. As a result, the crystal rod is prone to jumping during the rolling process, and the grinding wheel impacts the crystal rod unevenly, causing abnormalities and affecting the entire production process. Summary of the Invention

[0003] The purpose of this invention is to provide a concentric positioning device for a crystal rod rounding fixture, which solves the technical problem in the prior art that it is not possible to ensure concentric bonding between the rounding fixture and the crystal rod.

[0004] The present invention provides a concentric positioning device for a crystal rod rounding fixture, comprising a crystal rod positioning device and two rounding fixture positioning devices.

[0005] The crystal rod positioning device includes a first inclined rod, a second inclined rod, a third inclined rod, and a fourth inclined rod. The first inclined rod and the second inclined rod, as well as the third inclined rod and the fourth inclined rod, are all hinged together by a first rotating shaft. A cylindrical support rod is connected between the top ends of the first inclined rod and the third inclined rod, and between the top ends of the second inclined rod and the fourth inclined rod. The cylindrical support rod is parallel to the first rotating shaft.

[0006] Each of the rolling jig positioning devices includes a height adjustment device. Two height adjustment devices are symmetrically arranged on both sides of the crystal rod positioning device. Each height adjustment device includes a fixed end and a lifting end. The lifting end is connected to the fixed end through a lifting mechanism. The fixed end is provided with a positioning hole, which is coaxial with the first rotating shaft. Each end face of the first rotating shaft is provided with a threaded hole. Each positioning hole is provided with a positioning bolt, which passes through the positioning hole and extends into the threaded hole. The top of the lifting end is provided with a V-shaped bracket with the opening facing upward. The axis of the positioning bolt intersects the vertical center line of the V-shaped bracket.

[0007] Furthermore, the height adjustment device includes a base plate, with a first side plate connected to each side of the base plate. Two first X-shaped frames are arranged parallel to each other on the base plate. Each first X-shaped frame includes a first connecting rod and a second connecting rod. The lower end of the first connecting rod is hinged to one end of the first side plate via a second rotating shaft. The second rotating shaft is parallel to the first rotating shaft. A second sliding groove is provided at the other end of the first side plate. A third rotating shaft is connected to the lower end of the second connecting rod. The third rotating shaft is located in the second sliding groove and forms a sliding pair with the first side plate. The third rotating shaft is parallel to the first rotating shaft. A support seat is provided on the outer side of the base plate. A first sliding groove is provided on the support seat along its height direction. The positioning hole passes through the middle of the first connecting rod and the second connecting rod of the two first X-shaped frames. The positioning bolt passes through the first sliding groove and the positioning hole in sequence. The first connecting rod and the second connecting rod are hinged by the positioning bolt.

[0008] A fourth pivot is connected between the upper ends of the first connecting rods of the two first X-shaped frames. The fourth pivot is parallel to the first pivot. A fifth pivot is connected between the upper ends of the second connecting rods of the two first X-shaped frames. The fifth pivot is parallel to the first pivot. A second X-shaped frame is connected to the upper side of each of the two first X-shaped frames. The second X-shaped frame includes a third connecting rod and a fourth connecting rod. The third connecting rod and the fourth connecting rod are hinged together by a sixth pivot. The sixth pivot passes through the first slide groove. The lower ends of the fourth connecting rod and the third connecting rod are hinged to the upper ends of the second connecting rod and the first connecting rod, respectively, by the fourth pivot and the fifth pivot. A top plate is provided on the upper side of the second X-shaped frame. A second side plate is connected to the bottom two sides of the top plate. The upper end of the third connecting rod is hinged to one end of the second side plate by a seventh pivot. A third slide groove is provided at the other end of the second side plate. An eighth pivot is connected to the upper end of the fourth connecting rod. The eighth pivot is located in the third slide groove. The eighth pivot and the second side plate form a sliding pair. The V-shaped bracket is located on the upper side of the top plate.

[0009] The fourth and fifth rotating shafts are respectively provided with a right-hand threaded hole and a left-hand threaded hole along the radial axis, and an adjusting screw passes through the right-hand threaded hole and the left-hand threaded hole; a vertical scale adjacent to the adjusting screw is provided on the base plate.

[0010] Compared with existing technologies, the present invention has positive and significant advantages. The concentric positioning device for a crystal rod rounding fixture of the present invention first uses a crystal rod positioning device and a rounding fixture positioning device for positioning, ensuring that the crystal rod axis intersects the vertical center line of the V-shaped frame. Then, a height adjustment device is used to adjust the height of the rounding fixture, making the rounding fixture coaxial with the crystal rod, thereby achieving concentric bonding between the rounding fixture and the crystal rod. This method is simple to operate, improves the concentricity of the rounding fixture and the crystal rod, reduces the uneven impact of the grinding wheel on the crystal rod, solves the problem of crystal rod swaying during the outer diameter rolling process, reduces the grinding allowance of the crystal rod, improves grinding efficiency, and saves production costs. Attached Figure Description

[0011] Figure 1 This is a front view schematic diagram of a concentric positioning device for a crystal rod rounding fixture according to the present invention.

[0012] Figure 2 This is a side view schematic diagram of a concentric positioning device for a crystal rod rounding fixture according to the present invention.

[0013] Figure 3 This is a schematic diagram of the crystal rod positioning device in the concentric positioning device of a crystal rod rounding fixture according to the present invention.

[0014] Figure 4 This is a front view schematic diagram of the height adjustment device in the concentric positioning device of a crystal rod rounding fixture of the present invention before it is raised.

[0015] Figure 5 This is a front view schematic diagram of the height adjustment device in the concentric positioning device of a crystal rod rounding fixture of the present invention after it has been raised.

[0016] Figure 6 This is a side view schematic diagram of the height adjustment device in the concentric positioning device of a crystal rod rounding fixture according to the present invention.

[0017] Figure 7 This is a front view schematic diagram of the first usage state of the concentric positioning device of the crystal rod rounding fixture of the present invention.

[0018] Figure 8 This is a side view of the first usage state of the concentric positioning device of the crystal rod rounding fixture of the present invention.

[0019] Figure 9 This is a front view schematic diagram of the second usage state of the concentric positioning device of the crystal rod rounding fixture of the present invention.

[0020] Figure 10 This is a side view of the second usage state of the concentric positioning device of the crystal rod rounding fixture of the present invention. Detailed Implementation

[0021] The present invention will be further described below with reference to embodiments, but the present invention is not limited to these embodiments. Any similar structures and similar variations of the present invention should be included within the scope of protection of the present invention. The use of directions such as up, down, front, back, left, and right in the present invention is only for the convenience of description and is not intended to limit the technical solution of the present invention.

[0022] like Figures 1-10 As shown, a concentric positioning device for a crystal rod rolling jig of the present invention includes a crystal rod positioning device 1 and two rolling jig positioning devices 2.

[0023] The crystal rod positioning device 1 includes a first inclined rod 3, a second inclined rod 4, a third inclined rod 5, and a fourth inclined rod 6. The first inclined rod 3 and the second inclined rod 4, as well as the third inclined rod 5 and the fourth inclined rod 6, are all hinged together by a first rotating shaft 7. A cylindrical support rod 8 is connected between the top ends of the first inclined rod 3 and the third inclined rod 5, and between the top ends of the second inclined rod 4 and the fourth inclined rod 6. The cylindrical support rod 8 is parallel to the first rotating shaft 7.

[0024] Each of the rolling jig positioning devices 2 includes a height adjustment device 9. The two height adjustment devices 9 are symmetrically arranged on both sides of the crystal rod positioning device 1. Each height adjustment device 9 includes a fixed end and a lifting end. The lifting end is connected to the fixed end through a lifting mechanism. The fixed end is provided with a positioning hole 10. The positioning hole 10 is coaxially arranged with the first rotating shaft 7. Each end face of the first rotating shaft 7 is provided with a threaded hole 11. Each positioning hole 10 is provided with a positioning bolt 12. The positioning bolt 12 passes through the positioning hole 10 and extends into the threaded hole 11. The top of the lifting end is provided with a V-shaped bracket 13. The V-shaped bracket 13 opens upward. The axis of the positioning bolt 12 intersects the vertical center line of the V-shaped bracket 13.

[0025] Furthermore, the height adjustment device 9 includes a base plate 14, with a first side plate 15 connected to each side of the base plate 14. Two first X-shaped frames are arranged parallel to each other on the base plate 14. Each first X-shaped frame includes a first connecting rod 16 and a second connecting rod 17. The lower end of the first connecting rod 16 is hinged to one end of the first side plate 15 via a second rotating shaft 18. The second rotating shaft 18 is parallel to the first rotating shaft 15. A second sliding groove 19 is provided at the other end of the first side plate 15. A third rotating shaft 20 is connected to the lower end of the second connecting rod 17. 20 is set in the second slide groove 19, the third rotating shaft 20 and the first side plate 15 form a sliding pair, the third rotating shaft 20 is parallel to the first rotating shaft 7, the outer side of the base plate 14 is provided with a support seat 21, the support seat 21 is provided with a first slide groove 22 along its height direction, the positioning hole 10 passes through the middle of the first connecting rod 16 and the second connecting rod 17 of the two first X-shaped frames, the positioning bolt 12 passes through the first slide groove 22 and the positioning hole 10 in sequence, and the first connecting rod 16 and the second connecting rod 17 are hinged by the positioning bolt 12;

[0026] A fourth pivot 23 is connected between the upper ends of the first connecting rods 16 of the two first X-shaped frames. The fourth pivot 23 is parallel to the first pivot 7. A fifth pivot 24 is connected between the upper ends of the second connecting rods 17 of the two first X-shaped frames. The fifth pivot 24 is parallel to the first pivot 7. Each of the upper sides of the two first X-shaped frames is connected to a second X-shaped frame, which includes a third connecting rod 25 and a fourth connecting rod 26. The third connecting rod 25 and the fourth connecting rod 26 are hinged together by a sixth pivot 27, which passes through the first slide groove 22. The lower ends of the fourth connecting rod 26 and the third connecting rod 25 are respectively connected by a fourth pivot 27. The upper ends of the pivot 23 and the fifth pivot 24 are hinged to the second connecting rod 17 and the first connecting rod 16. A top plate 28 is provided on the upper side of the second X-shaped frame. A second side plate 29 is connected to the bottom two sides of the top plate 28. The upper end of the third connecting rod 25 is hinged to one end of the second side plate 29 through a seventh pivot 30. A third sliding groove 31 is provided at the other end of the second side plate 29. The upper end of the fourth connecting rod 26 is connected to an eighth pivot 32. The eighth pivot 32 is set in the third sliding groove 31. The eighth pivot 32 and the second side plate 29 form a sliding pair. The V-shaped bracket 13 is set on the upper side of the top plate 28.

[0027] The fourth rotating shaft 23 and the fifth rotating shaft 24 are respectively provided with a right-hand threaded hole 33 and a left-hand threaded hole 34 along the radial direction. An adjusting screw 35 passes through the right-hand threaded hole 33 and the left-hand threaded hole 34. A vertical scale 36 adjacent to the adjusting screw 35 is provided on the base plate 14.

[0028] Specifically, the positioning bolt 12 and the sixth rotating shaft 27 both pass through the first slide groove 22 and can slide within the first slide groove 22 to prevent the height adjustment device 9 from wobbling left and right. The height of the V-shaped bracket 13 can be adjusted by adjusting the screw 35, the right-hand threaded hole 33, and the left-hand threaded hole 34.

[0029] Specifically, in this embodiment, the height adjustment device 9, the fixed end, the lifting end, the V-shaped bracket 13, the first X-shaped bracket, the second X-shaped bracket, etc., all adopt well-known solutions in the prior art, which are already known to those skilled in the art, and will not be described in detail here.

[0030] The working principle of this embodiment:

[0031] First, such as Figure 7 , Figure 8 As shown, place the crystal rod 37 on the crystal rod positioning device 1. The outer circumferences of the two cylindrical support rods 8 are tangent to the crystal rod 37, supporting the crystal rod 37. Adjust the crystal rod positioning device 1 to adjust the height of the crystal rod 37 so that the lowest point of the crystal rod 37 is on the same horizontal plane as the lowest point of the cylindrical support rod 8. The positioning bolt 12 passes through the first sliding groove 22 and the positioning hole 10 and enters the threaded hole 11 to ensure that the vertical center line of the V-shaped bracket 13 intersects the axis of the crystal rod 37. Place the small ends of the two rolling clamps 38 on the two V-shaped brackets 13 respectively, with the large ends of the two rolling clamps 38 close to the crystal rod 37. Use the adjusting screws 35 to adjust the two height adjusting devices 9 respectively so that the lowest point of the large end of the two rolling clamps 38 is on the same horizontal plane as the lowest point of the crystal rod 37, completing the zeroing. Then, as shown... Figure 9 , Figure 10 As shown, referring to the scale 36, the two height adjustment devices 9 are adjusted by adjusting the screws 35 to raise the rolling clamp 38 so that the large end of the rolling clamp 38 is coaxial with the crystal rod 37. Then, the large ends of the two rolling clamps 38 are bonded to the two end faces of the crystal rod 37 respectively. Then, the bonded crystal rod 37 and rolling clamp 38 can be placed in the rolling equipment for rolling.

[0032] The present invention discloses a concentric positioning device for a crystal rod rounding fixture. First, the crystal rod positioning device 1 and the rounding fixture positioning device 2 are used for positioning, ensuring that the axis of the crystal rod 37 intersects the vertical center line of the V-shaped frame 13. Then, the height of the rounding fixture 38 is adjusted using the height adjustment device 9, making the rounding fixture 38 coaxial with the crystal rod 37. This achieves concentric bonding between the rounding fixture 38 and the crystal rod 37. The operation is simple, improves the concentricity of the rounding fixture 38 and the crystal rod 37, reduces the uneven impact of the grinding wheel on the crystal rod 37, solves the swaying problem of the crystal rod 37 during the outer circle rolling process, reduces the grinding allowance of the crystal rod 37, improves grinding efficiency, and saves production costs.

Claims

1. A concentric positioning device for a crystal bar rounding jig, characterized by: The device comprises a crystal bar positioning device and two rounding clamp positioning devices. The crystal bar positioning device comprises a first inclined rod, a second inclined rod, a third inclined rod and a fourth inclined rod, the first inclined rod and the second inclined rod are hinged through a first rotating shaft, the third inclined rod and the fourth inclined rod are hinged through a second rotating shaft, the top ends of the first inclined rod and the third inclined rod are connected with a cylindrical support rod respectively, the top ends of the second inclined rod and the fourth inclined rod are connected with a cylindrical support rod respectively, the cylindrical support rods are parallel to the first rotating shaft, each of the two rounding clamp positioning devices comprises a height adjusting device, the two height adjusting devices are symmetrically arranged on the two sides of the crystal bar positioning device, each of the height adjusting devices comprises a fixed end and a lifting end, the lifting end is connected with the fixed end through a lifting mechanism, the fixed end is provided with a positioning hole, the positioning hole is coaxially arranged with the first rotating shaft, the two end faces of the first rotating shaft are respectively provided with a threaded hole, each of the positioning holes is provided with a positioning bolt, the positioning bolt extends into the threaded hole through the positioning hole, the top of the lifting end is provided with a V-shaped support, the V-shaped support is open upward, the axis of the positioning bolt intersects with the vertical center line of the V-shaped support; The height adjusting device comprises a bottom plate, the two sides of the bottom plate are respectively connected with a first side plate, the bottom plate is provided with two first X-shaped frames in parallel and at intervals, the first X-shaped frame comprises a first connecting rod and a second connecting rod, the lower end of the first connecting rod is hinged with one end of the first side plate through a second rotating shaft, the second rotating shaft is parallel to the first rotating shaft, the other end of the first side plate is provided with a second sliding groove, the lower end of the second connecting rod is connected with a third rotating shaft, the third rotating shaft is arranged in the second sliding groove, the third rotating shaft and the first side plate form a sliding pair, the third rotating shaft is parallel to the first rotating shaft, the outer side of the bottom plate is provided with a support seat, the support seat is provided with a first sliding groove along the height direction thereof, the positioning hole penetrates the middle portions of the first connecting rods and the second connecting rods of the two first X-shaped frames, the positioning bolt sequentially penetrates the first sliding groove and the positioning hole, the first connecting rod and the second connecting rod are hinged through the positioning bolt; The upper ends of the first connecting rods of the two first X-shaped frames are connected with a fourth rotating shaft, the fourth rotating shaft is parallel to the first rotating shaft, the upper ends of the second connecting rods of the two first X-shaped frames are connected with a fifth rotating shaft, the fifth rotating shaft is parallel to the first rotating shaft, the upper sides of the two first X-shaped frames are respectively connected with a second X-shaped frame, the second X-shaped frame comprises a third connecting rod and a fourth connecting rod, the third connecting rod and the fourth connecting rod are hinged through a sixth rotating shaft, the sixth rotating shaft penetrates the first sliding groove, the lower ends of the fourth connecting rod and the third connecting rod are respectively hinged with the upper ends of the second connecting rod and the first connecting rod through the fourth rotating shaft and the fifth rotating shaft, the upper side of the second X-shaped frame is provided with a top plate, the bottom of the top plate is connected with a second side plate, the upper end of the third connecting rod is hinged with one end of the second side plate through a seventh rotating shaft, the other end of the second side plate is provided with a third sliding groove, the upper end of the fourth connecting rod is connected with an eighth rotating shaft, the eighth rotating shaft is arranged in the third sliding groove, the eighth rotating shaft and the second side plate form a sliding pair, the V-shaped support is arranged on the upper side of the top plate. The fourth rotating shaft and the fifth rotating shaft are respectively provided with a right-handed thread hole and a left-handed thread hole along the radial direction, and the right-handed thread hole and the left-handed thread hole are provided with an adjusting screw; a vertical scale adjacent to the adjusting screw is arranged on the bottom plate.

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