Fettling device for high-low voltage electric porcelain production

Abstract

The invention relates to the field of electric porcelain production, in particular to a fettling device for high-low voltage electric porcelain production. When the inner surface and the outer surface of an existing device are trimmed, the inner side and the outer side of a blank are inconvenient to respectively clamp on the premise that a clamp is not replaced, the working efficiency is influenced, slag is easy to accumulate and difficult to discharge when the inner wall of the blank is trimmed, the blank is inconvenient to lift, and a contact surface is inconvenient to trim. A fettling device for high-low voltage electric porcelain production comprises a base and the like. The device comprises a base, an electric rotating disc is arranged on the base, two supporting tables are fixedly connected to the electric rotating disc, two placing plates are fixedly connected to each supporting table, and a supporting vertical rod is fixedly connected to one side of the base. The arc-shaped plate horizontally moves in different directions, so that different cushion blocks can clamp the inner surface and the outer surface of a blank respectively, the adaptability of the clamp is improved, different clamps do not need to be replaced, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of electric porcelain production, and particularly relates to a trimming device for the production of high-voltage and low-voltage electric porcelain. Background Art

[0002] High-voltage and low-voltage electric porcelain are key components used for insulation and supporting conductors in the power system. They are divided into high-voltage electric porcelain and low-voltage electric porcelain according to different usage scenarios. The production of electric porcelain is based on billets. After trimming the billets into specified dimensions and appearances, they are sintered to form the final electric porcelain. The high-voltage electric porcelain bushing is one of them. It has a truncated conical insulating structure with a thinner upper part and a thicker lower part, and is designed specifically for high-voltage power equipment. When trimming it, both the inner and outer surfaces need to be trimmed.

[0003] However, the existing devices are not convenient for clamping the inner and outer sides of the billet respectively without replacing the fixture when trimming the inner and outer surfaces, which affects the working efficiency. Moreover, when trimming the inner wall of the billet, slag is likely to accumulate and is not easy to discharge, and it is also not convenient to lift the billet, making it difficult to trim the contact surface. Summary of the Invention

[0004] In order to overcome the deficiencies in the background art, the present invention provides a trimming device for the production of high-voltage and low-voltage electric porcelain with high clamping adaptability, convenient slag discharge, and convenient trimming of the contact surface.

[0005] The technical implementation solution of the present invention is as follows: A trimming device for the production of high-voltage and low-voltage electric porcelain, including a base. An electric turntable is arranged on the base. A number of clamping grooves are opened on the electric turntable. Two support platforms are fixedly connected to the electric turntable. Two placing plates are fixedly connected to each of the two support platforms. A support vertical rod is fixedly connected to one side of the base. A clamping mechanism is arranged on the electric turntable, and the clamping mechanism is used to clamp the billet. A tool moving mechanism is arranged on the upper part of the support vertical rod, and the tool moving mechanism is used to manually feed a trimming tool.

[0006] More preferably, the clamping mechanism includes an internal gear ring which is rotatably connected to the middle of the electric turntable. Four transmission gears are rotatably connected to the electric turntable, and the four transmission gears are meshed with the internal gear ring. An external gear ring is placed on the electric turntable, and the external gear ring is meshed with the four transmission gears. A radian frame is fixedly connected to one side of the external gear ring. A handle is slidably connected to the radian frame. A first magnet block is fixedly connected to the lower end of the handle. A second magnet block is fixedly connected to the external gear ring, and the second magnet block has the opposite magnetism to the first magnet block. A clamping rod is slidably connected to the external gear ring, and the lower part of the clamping rod is located in a clamping groove on the electric turntable. A compression spring is connected between the clamping rod and the external gear ring. A limiting strip is fixedly connected to the electric turntable, and the limiting strip is in contact with the external gear ring. Two sliders are slidably connected to each placing plate, and the two sliders are in a group. An arc-shaped panel is slidably connected between the two sliders in each group. An inner arc-shaped cushion block and an outer arc-shaped cushion block are fixedly connected to each arc-shaped panel. A connecting rod is fixedly connected to the lower part of each arc-shaped panel. A guiding frame is fixedly connected to the middle of the internal gear ring, and an inclined groove is formed in the guiding frame. One end of the connecting rod is located in the inclined groove on the guiding frame.

[0007] More preferably, the tool moving mechanism includes a first tool holder which is slidably connected to the supporting vertical rod. A first rotating screw rod is rotatably connected to the supporting vertical rod, and the first rotating screw rod is threadedly connected to the first tool holder. A swinging bracket is rotatably connected to the upper part of the supporting vertical rod. A limiting block is fixedly connected to the swinging bracket. A second tool holder is slidably connected to the upper part of the swinging bracket. A second rotating screw rod is rotatably connected to the swinging bracket, and the second rotating screw rod is threadedly connected to the second tool holder.

[0008] More preferably, a slag discharging mechanism is further included. The slag discharging mechanism is arranged on the placing plate and is used for cleaning the slag inside the blank. The slag discharging mechanism includes a connecting plate which is fixedly connected to the second tool holder. A moving long rod is slidably connected to the connecting plate. A reset spring is connected between the moving long rod and the connecting plate. A magnet block is fixedly connected to one end of the moving long rod. A guiding concave plate is fixedly connected between the four placing plates. Two straight grooves are formed in the guiding concave plate. A round rod is fixedly connected to the middle of the guiding concave plate. A semi-circular rotating block is rotatably connected to the round rod. Several planes are arranged on the surface of the semi-circular rotating block. Several shifting rods are fixedly connected to the lower part of the semi-circular rotating block.

[0009] More preferably, it further includes a blank lifting mechanism which is arranged on the electric turntable. The blank lifting mechanism is used to lift the blank by a certain distance when the blank rotates. The blank lifting mechanism includes four slide rails, and limit plates are fixedly connected to all four slide rails. A sliding top plate is slidably connected to each slide rail. A guiding inclined surface is provided on the sliding top plate. A number of rolling balls are rotatably connected to the lower part and the side surface of the sliding top plate, and the rolling balls are in contact with the inner wall of the slide rail. A guiding rod is fixedly connected to one side of each sliding top plate. The guiding rod passes through the limit plate, and a return spring is connected between the limit plate and the sliding top plate. A heavy ball is fixedly connected to one end of each guiding rod. A side rod is fixedly connected to the lower part of each arc-shaped plate, and a rolling ring is rotatably connected to each side rod. The rolling ring is in contact with the upper surface of the sliding top plate.

[0010] The present invention has the following advantages: 1. By horizontally moving the arc-shaped plates in different directions, different cushion blocks can respectively clamp the inner and outer surfaces of the blank, which improves the adaptability of the fixture, eliminates the need to replace different fixtures, and improves work efficiency.

[0011] 2. When trimming the inner wall of the blank, the slag generated will fall and accumulate inside the blank. Then, the guiding concave plate can export these slag through the centrifugal force during rotation, and the relative movement between the dial rod and the guiding concave plate can prevent the slag from being blocked during export.

[0012] 3. After the blank is clamped, start the electric turntable. The electric turntable drives the blank to rotate, and it also drives the slide rails and the sliding top plates to rotate together. Under the action of centrifugal force, the heavy balls will pull the four sliding top plates to horizontally move a certain distance in the direction away from each other, and the return springs are compressed. Then, when the sliding top plates horizontally move a certain distance, they will squeeze the rolling rings and the side rods to move upward a certain distance through the inclined surface, thereby causing the four arc-shaped plates to move upward a certain distance. Since the four arc-shaped plates and the cushion blocks clamp the blank, the upward movement of the arc-shaped plates will lift the blank upward a certain distance, so that the blank is separated from the contact with the placement plate, which is convenient for simultaneously trimming the place where the lower surface of the blank contacts the placement plate. Description of the Drawings

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0014] Figure 2 It is a three-dimensional structural schematic diagram of the support table and the placement plate of the present invention.

[0015] Figure 3 It is a three-dimensional structural schematic diagram of the clamping mechanism of the present invention.

[0016] Figure 4This is a separated three-dimensional structure schematic diagram of the slider and the arc panel of the present invention.

[0017] Figure 5 This is a three-dimensional structure schematic diagram of the clamping rod of the present invention.

[0018] Figure 6 This is a three-dimensional structure schematic diagram of the guide frame and the connecting rod of the present invention.

[0019] Figure 7 This is a separated three-dimensional structure schematic diagram of the radian frame and the handle of the present invention.

[0020] Figure 8 This is a three-dimensional structure schematic diagram of the slag discharging mechanism of the present invention.

[0021] Figure 9 For the present invention Figure 8 An enlarged three-dimensional structure schematic diagram of the position A in it.

[0022] Figure 10 This is a separated three-dimensional structure schematic diagram of the guide concave plate and the semi-circular rotating block of the present invention.

[0023] Figure 11 This is a three-dimensional structure schematic diagram of the blank lifting mechanism of the present invention.

[0024] Figure 12 This is a separated three-dimensional structure schematic diagram of the blank lifting mechanism of the present invention.

[0025] The markings of each component in the drawings are as follows: 1 - base, 2 - electric turntable, 3 - support table, 4 - placement plate, 5 - support vertical rod, 61 - internal gear ring, 62 - transmission gear, 63 - external gear ring, 641 - radian frame, 642 - handle, 643 - magnet block 1, 642 - magnet block 2, 65 - clamping rod, 66 - pressure spring, 67 - limit strip, 68 - slider, 69 - arc panel, 610 - inner arc surface cushion block, 611 - outer arc surface cushion block, 612 - connecting rod, 613 - guide frame, 71 - tool rest 1, 72 - rotating screw rod 1, 73 - swing bracket, 74 - limit block, 75 - tool rest 2, 76 - rotating screw rod 2, 81 - connecting plate, 82 - moving long rod, 83 - return spring, 84 - magnet block, 85 - guide concave plate, 86 - round rod, 87 - semi-circular rotating block, 88 - shift lever, 91 - slide rail, 92 - limit plate, 93 - sliding top plate, 931 - ball, 94 - guide rod, 95 - return spring, 96 - heavy ball, 97 - side rod, 98 - rolling ring. Detailed implementation manners

[0026] The technical solution will be further described below in conjunction with specific embodiments. It should be noted that: The words indicating directions such as up, down, left, and right in this article are only in reference to the positions of the shown structures in the corresponding drawings. The serial numbers assigned to the components in this article, for example: the first, the second, etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. And for the connections and couplings mentioned in this application, unless otherwise specified, both direct and indirect connections (couplings) are included.

[0027] Embodiment 1 A trimming device for the production of high and low voltage porcelain, as Figures 1-12 shown, includes a base 1. An electric turntable 2 is arranged on the base 1. A number of clamping grooves are formed on the electric turntable 2. Two support platforms 3 are fixedly connected to the electric turntable 2. Two placing plates 4 are fixedly connected to each of the two support platforms 3. A support vertical rod 5 is fixedly connected to one side of the base 1. A clamping mechanism is arranged on the electric turntable 2, and the clamping mechanism is used to clamp the blank. A tool moving mechanism is arranged on the upper part of the support vertical rod 5, and the tool moving mechanism is used to manually feed the trimming tool.

[0028] The clamping mechanism includes an internal gear ring 61. The internal gear ring 61 is rotatably connected to the middle of the electric turntable 2. Four transmission gears 62 are rotatably connected to the electric turntable 2. The four transmission gears 62 are meshed with the internal gear ring 61. An external gear ring 63 is placed on the electric turntable 2. The external gear ring 63 is meshed with the four transmission gears 62. An arc-shaped frame 641 is fixedly connected to one side of the external gear ring 63. A handle 642 is slidably connected to the arc-shaped frame 641. A first magnet block 643 is fixedly connected to the lower end of the handle 642. A second magnet block 644 is fixedly connected to the external gear ring 63. The second magnet block 644 and the first magnet block 643 have opposite magnetic polarities. A clamping rod 65 is slidably connected to the external gear ring 63. The lower part of the clamping rod 65 is located in the clamping groove on the electric turntable 2. A compression spring 66 is connected between the clamping rod 65 and the external gear ring 63. A limiting strip 67 is fixedly connected to the electric turntable 2. The limiting strip 67 is in contact with the external gear ring 63. Two sliders 68 are slidably connected to each placing plate 4. The two sliders 68 are in a group. An arc-shaped panel 69 is slidably connected between the two sliders 68 in each group. An inner arc-shaped cushion block 610 and an outer arc-shaped cushion block 611 are fixedly connected to each arc-shaped panel 69. A connecting rod 612 is fixedly connected to the lower part of each arc-shaped panel 69. A guiding frame 613 is fixedly connected to the middle of the internal gear ring 61. An inclined slot is formed on the guiding frame 613. One end of the connecting rod 612 is located in the inclined slot on the guiding frame 613.

[0029] The knife moving mechanism includes a first tool holder 71, the first tool holder 71 is slidably connected to the support vertical rod 5, a first rotating screw rod 72 is rotatably connected to the support vertical rod 5, the first rotating screw rod 72 is in threaded connection with the first tool holder 71, a swing bracket 73 is rotatably connected to the upper part of the support vertical rod 5, a limiting block 74 is fixedly connected to the swing bracket 73, a second tool holder 75 is slidably connected to the upper part of the swing bracket 73, a second rotating screw rod 76 is rotatably connected to the swing bracket 73, and the second rotating screw rod 76 is in threaded connection with the second tool holder 75.

[0030] In the actual blank repair work, the insulator sleeve blank is in the shape of a conical hollow cylinder with a narrow top and a wide bottom, and its inner and outer surfaces need to be repaired. First, the blank is placed on the placement plate 4 in a narrow and wide posture, and then the four arc panels 69 are located inside the blank. Then the clamping rod 65 is lifted and the handle 642 is pulled. The handle 642 drives the outer gear ring 63 to rotate through the magnetic force between the magnet block 1 643 and the magnet block 2 644. The rotation of the outer gear ring 63 will drive the inner gear ring 61 to rotate together through the transmission gear 62. The rotation of the inner gear ring 61 will drive the guide frame 613 to rotate together. The guide frame 613 The rotation will squeeze the four connecting rods 612 through the inclined groove to move horizontally in the direction away from each other. The horizontal movement of the connecting rod 612 will drive the four arc panels 69 to move horizontally in the direction away from each other, and then the four arc panels 69 drive the four outer arc pads 611 to slightly squeeze and support the inner wall of the blank, and the pushing handle 642 will encounter resistance. When the handle 642 is continued to be pushed with too much force, the magnet block 1 643 and the magnet block 2 644 will be out of the state of attraction, so that the pushing handle 642 will no longer drive the outer gear ring 63 to rotate, so that the clamping of the side of the blank can be overloaded to prevent clamping If the holding force is too great and the blank is damaged, the clamping rod 65 can make the outer gear ring 63 stop rotating after being clamped. After clamping, the electric turntable 2 is started to drive the blank to rotate, and then the rotating screw 72 is rotated to drive the tool holder 71 to move horizontally to trim the outer surface of the blank. After the outer surface trimming is completed, the electric turntable 2 is closed, the blank is loosened, and then the blank is inverted on the placement plate 4 in a state of being wide at the top and narrow at the bottom, and the four arc panels 69 are located on the outside of the blank, and then the outer gear ring 63 is rotated by the handle 642 to drive the arc panels 69 and the inner arc pad 610 to trim the outer surface of the blank. After the swing bracket 73 is clamped, the swing bracket 73 is moved to a certain angle. After the swing bracket 73 is rotated, the limit block 74 contacts the upper part of the supporting upright 5, and the rotating screw 76 is in a horizontal state. The tool holder 75 extends from the wide opening above the blank into the interior of the blank after the swing bracket 73 is rotated, and then the rotating screw 76 is rotated to drive the tool holder 75 to move horizontally to trim the inner wall of the blank. By moving the arc panel 69 horizontally in different directions, different pads can clamp the inner and outer surfaces of the blank respectively, thereby improving the adaptability of the clamp, eliminating the need to replace different clamps, and improving work efficiency.

[0031] Example 2 On the basis of Example 1, Figures 8-10As shown, it further includes a slag discharging mechanism. The slag discharging mechanism is arranged on the placing plate 4 and is used to clean the slag inside the blank. The slag discharging mechanism includes a connecting plate 81. The connecting plate 81 is fixedly connected to the second tool holder 75. A moving long rod 82 is slidably connected to the connecting plate 81. A return spring 83 is connected between the moving long rod 82 and the connecting plate 81. One end of the moving long rod 82 is fixedly connected to a magnet block 84. A guiding concave plate 85 is fixedly connected between the four placing plates 4. Two straight grooves are formed in the guiding concave plate 85. A round rod 86 is fixedly connected to the middle of the guiding concave plate 85. A semi-circular rotating block 87 is rotatably connected to the round rod 86. Several planes are provided on the surface of the semi-circular rotating block 87. Several shifting rods 88 are fixedly connected to the lower part of the semi-circular rotating block 87.

[0032] When the swinging bracket 73 is rotated to trim the inner wall of the blank, after the swinging bracket 73 rotates, it will drive the second tool holder 75 to rotate into the blank. When the second tool holder 75 rotates into the blank, the second tool holder 75 will drive the moving long rod 82 and the magnet block 84 to rotate into the blank together. Then, after the magnet block 84 is in place following the second tool holder 75, it will contact and attract the surface of the semi-circular rotating block 87. Then, when the second tool holder 75 moves horizontally, it will drive the connecting plate 81 to move, and the return spring 83 is stretched. Since the magnet block 84 attracts the semi-circular rotating block 87, when the electric turntable 2 drives the placing plate 4 and the blank to rotate together, the guiding concave plate 85 will also rotate, but the semi-circular rotating block 87 will not rotate along with it. In this way, there is relative movement between the shifting rods 88 under the semi-circular rotating block 87 and the guiding concave plate 85. Since when trimming the inner wall of the blank, the generated slag will fall and accumulate inside the blank, then the guiding concave plate 85 can export these slag through the centrifugal force during rotation, and the relative movement between the shifting rods 88 and the guiding concave plate 85 can prevent the slag from being blocked easily when being exported.

[0033] Embodiment 3 On the basis of Embodiment 2, as Figures 11-12As shown, it further includes a blank lifting mechanism. The blank lifting mechanism is arranged on the electric turntable 2 and is used to lift the blank by a certain distance when the blank rotates. The blank lifting mechanism includes four slide rails 91. Limiting plates 92 are fixedly connected to all four slide rails 91. A sliding top plate 93 is slidably connected to each slide rail 91. The sliding top plate 93 is provided with a guiding inclined surface. A number of balls 931 are rotatably connected to the lower part and the side surface of the sliding top plate 93. The balls 931 are in contact with the inner wall of the slide rail 91. A guiding rod 94 is fixedly connected to one side of each sliding top plate 93. The guiding rod 94 passes through the limiting plate 92. A return spring 95 is connected between the limiting plate 92 and the sliding top plate 93. A heavy ball 96 is fixedly connected to one end of each guiding rod 94. A side rod 97 is fixedly connected to the lower part of each arc-shaped plate 69. A rolling ring 98 is rotatably connected to each side rod 97. The rolling ring 98 is in contact with the upper surface of the sliding top plate 93.

[0034] After the blank is clamped, start the electric turntable 2. The electric turntable 2 drives the blank to rotate. The electric turntable 2 will also drive the slide rails 91 and the sliding top plates 93 to rotate together. Under the action of centrifugal force, the heavy balls 96 will pull the four sliding top plates 93 to horizontally move a certain distance in the direction away from each other. The return springs 95 are compressed. Then, when the sliding top plates 93 horizontally move a certain distance, they will squeeze the rolling rings 98 and the side rods 97 to move upward a certain distance through the inclined surface, thereby causing the four arc-shaped plates 69 to move upward a certain distance. Since the four arc-shaped plates 69 and the cushion blocks clamp the blank, the upward movement of the arc-shaped plates 69 will lift the blank upward a certain distance, so that the blank is separated from the contact with the placement plate 4, which is convenient for simultaneously trimming the place where the lower surface of the blank contacts the placement plate 4. The balls 931 on the side and bottom of the sliding top plate 93 and the rolling rings 98 can reduce the friction force.

[0035] Although the present disclosure has been shown and described with reference to specific exemplary embodiments of the present disclosure, those skilled in the art should understand that various changes in form and details can be made to the present disclosure without departing from the spirit and scope of the present disclosure defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above embodiments, but should be determined not only by the appended claims but also by the equivalents of the appended claims.

Claims

1. A trimming device for the production of high- and low-voltage porcelain, characterized in that: It includes a base (1), an electric turntable (2) is arranged on the base (1), several clamping grooves are formed on the electric turntable (2), two supporting platforms (3) are fixedly connected to the electric turntable (2), two placing plates (4) are fixedly connected to each of the two supporting platforms (3), a supporting vertical rod (5) is fixedly connected to one side of the base (1), a clamping mechanism is arranged on the electric turntable (2), the clamping mechanism is used to clamp a blank, and a tool moving mechanism is arranged on the upper part of the supporting vertical rod (5), and the tool moving mechanism is used to manually feed a blank trimming tool.

2. The trimming device for the production of high and low voltage porcelain according to claim 1, characterized in that: The clamping mechanism includes an internal gear ring (61), the internal gear ring (61) is rotatably connected to the middle of the electric turntable (2), four transmission gears (62) are rotatably connected to the electric turntable (2), the four transmission gears (62) are meshed with the internal gear ring (61), an external gear ring (63) is placed on the electric turntable (2), the external gear ring (63) is meshed with the four transmission gears (62), an arc-shaped frame (641) is fixedly connected to one side of the external gear ring (63), a handle (642) is slidably connected to the arc-shaped frame (641), a first magnet block (643) is fixedly connected to the lower end of the handle (642), a second magnet block (644) is fixedly connected to the external gear ring (63), the second magnet block (644) and the first magnet block (643) have opposite magnetic polarities, a clamping rod (65) is slidably connected to the external gear ring (63), the lower part of the clamping rod (65) is located in the clamping groove on the electric turntable (2), a compression spring (66) is connected between the clamping rod (65) and the external gear ring (63), a limiting strip (67) is fixedly connected to the electric turntable (2), the limiting strip (67) contacts the external gear ring (63), two sliders (68) are slidably connected to each placing plate (4), the two sliders (68) form a group, an arc-shaped panel (69) is slidably connected between the two sliders (68) in each group, an inner arc surface cushion block (610) and an outer arc surface cushion block (611) are fixedly connected to each arc-shaped panel (69), a connecting rod (612) is fixedly connected to the lower part of each arc-shaped panel (69), and a guiding frame (613) is fixedly connected to the middle of the internal gear ring (61).

3. A trimming device for the production of high and low voltage porcelain according to claim 2, characterized in that: An inclined groove is formed on the guiding frame (613), and one end of the connecting rod (612) is located in the inclined groove on the guiding frame (613).

4. A trimming device for the production of high- and low-voltage porcelain according to claim 2, characterized in that: The knife moving mechanism includes a first tool holder (71), the first tool holder (71) is slidably connected to the support vertical rod (5), a first rotating screw rod (72) is rotatably connected to the support vertical rod (5), the first rotating screw rod (72) is threadedly connected to the first tool holder (71), a swing bracket (73) is rotatably connected to the upper part of the support vertical rod (5), a limit block (74) is fixedly connected to the swing bracket (73), a second tool holder (75) is slidably connected to the upper part of the swing bracket (73), a second rotating screw rod (76) is rotatably connected to the swing bracket (73), and the second rotating screw rod (76) is threadedly connected to the second tool holder (75).

5. A trimming device for the production of high and low voltage porcelain according to claim 4, characterized in that: It further includes a slag discharging mechanism, the slag discharging mechanism is arranged on the placing plate (4), the slag discharging mechanism is used to clean the slag inside the blank, the slag discharging mechanism includes a connecting plate (81), the connecting plate (81) is fixedly connected to the second tool holder (75), a moving long rod (82) is slidably connected to the connecting plate (81), a return spring (83) is connected between the moving long rod (82) and the connecting plate (81), a magnet block (84) is fixedly connected to one end of the moving long rod (82), a guiding concave plate (85) is fixedly connected between the four placing plates (4), two straight grooves are formed on the guiding concave plate (85), a round rod (86) is fixedly connected to the middle of the guiding concave plate (85), a semi-circular rotating block (87) is rotatably connected to the round rod (86), and a plurality of dial rods (88) are fixedly connected to the lower part of the semi-circular rotating block (87).

6. A blank trimming device for the production of high and low voltage porcelain according to claim 5, characterized in that: A plurality of planes are arranged on the surface of the semi-circular rotating block (87).

7. A trimming device for the production of high and low voltage porcelain according to claim 5, characterized in that: It further includes a blank lifting mechanism, the blank lifting mechanism is arranged on the electric turntable (2), the blank lifting mechanism is used to lift the blank by a certain distance when the blank rotates, the blank lifting mechanism includes four slide rails (91), limit plates (92) are fixedly connected to all the four slide rails (91), a sliding top plate (93) is slidably connected to each of the slide rails (91), a plurality of balls (931) are rotatably connected to the lower part and the side surface of the sliding top plate (93), the balls (931) are in contact with the inner wall of the slide rail (91), a guiding rod (94) is fixedly connected to one side of each sliding top plate (93), the guiding rod (94) passes through the limit plate (92), a return spring (95) is connected between the limit plate (92) and the sliding top plate (93), a heavy ball (96) is fixedly connected to one end of each guiding rod (94), a side rod (97) is fixedly connected to the lower part of each arc-shaped plate (69), and a rolling ring (98) is rotatably connected to each side rod (97), and the rolling ring (98) is in contact with the upper surface of the sliding top plate (93).

8. A trimming device for the production of high and low voltage piezoelectric ceramics according to claim 7, characterized in that: A guiding inclined surface is arranged on the sliding top plate (93).

Images