High-precision cutting machine tool for weighing apparatus part production

Abstract

The invention provides a high-precision cutting machine tool for weighing apparatus part production, and relates to the technical field of machine tool machining. The mounting plate is of a rectangular structure, two rectangular blocks are arranged on the rear side of the mounting plate, the vertical rod with the detection hole A is arranged on the left side of the base plate and matched with the movable rod on the sliding frame, in the process that the sliding frame drives the circular saw to advance, the moving track of the sliding frame can be detected in real time, and when the movable rod cannot penetrate through the detection hole A, the detection hole A is detected. The movable rod triggers the control switch to timely turn off the lead screw for driving the sliding frame in the adjusting groove, so that the problem that the production precision of parts is reduced due to the reduction of the precision of the moving table is effectively avoided, the reject ratio of the parts is reduced, and the problem that after the moving table of the sawing machine driving cutting device is used for a long time, the production cost is reduced is solved. The problems that the movement precision of the parts is gradually reduced, if the parts are not detected and found in time, the production precision of the parts is reduced in the subsequent machining process, and then the reject ratio of the parts is increased are solved.

Description

Technical Field

[0001] This invention relates to the field of machine tool processing technology, and in particular to a high-precision cutting machine tool for the production of weighing instrument parts. Background Technology

[0002] Weighing instruments, as important measuring tools, are widely used in various fields such as industrial production, commercial trade, transportation, and medical and health care. The processing quality of the basic components of a weighing instrument directly determines its overall performance. Among them, parameters such as the dimensional accuracy and surface quality of the components play a key role in the weighing accuracy and service life of the instrument. In the processing flow of the basic components of a weighing instrument, cutting is an indispensable and important step. As the core equipment for cutting parts, the circular saw uses a high-speed rotating circular saw blade to cut metal or non-metal materials, processing the raw materials into blanks of specific sizes and shapes that meet the design requirements. Its working principle is to use the saw teeth on the circular saw blade to generate friction and cutting action with the material surface, gradually achieving material separation. In actual production, the circular saw has become one of the commonly used equipment for cutting and processing the basic components of a weighing instrument due to its advantages such as high cutting efficiency, relatively stable cutting accuracy, and wide range of processable materials.

[0003] However, the circular saws currently used for cutting and machining basic parts of weighing instruments still have the following technical problems: Firstly, the motion accuracy of the moving table that drives the cutting components will gradually decrease after long-term use. If this is not detected in time, it will lead to a decrease in the production accuracy of the parts in subsequent processing, which in turn will increase the defect rate of the parts. Secondly, the circular saw of the cutting machine tool is prone to slight deformation during long-term use. Since the deformation is very subtle, it is difficult to observe and judge directly with the naked eye. When using a circular saw with deformation for cutting, it will have an adverse effect on the production quality of parts. Summary of the Invention

[0004] To address the above problems, one objective of this invention is to overcome these shortcomings, and more specifically, to provide a high-precision cutting machine tool for the production of weighing instrument parts, which can detect the operating status of the sliding frame and circular saw through a detection structure, thereby improving the accuracy of the cutting device in processing weighing instrument parts.

[0005] In a first aspect, the present invention provides a high-precision cutting machine tool for the production of weighing instrument parts, specifically comprising: a mounting plate; the mounting plate having a rectangular structure, and two sets of rectangular blocks provided on the rear side of the mounting plate, each set of rectangular blocks having a rear groove inside; a carrier plate provided on the mounting plate, the carrier plate being mounted on a fixed plate on the rear side of the mounting plate, and a fixed shaft on the outside of the carrier plate being rotatably engaged with the fixed plate, and a positioning hole in the fixed shaft being able to be inserted into a movable pin in the fixed plate; a base plate provided on the front side of the mounting plate, the base plate being mounted inside a fixed frame on the front side of the mounting plate, and a rod on the outside of the base plate being inserted into a front hole on the mounting plate; a sliding frame being movably mounted in an adjustment groove in the fixed frame via a lead screw, and a movable rod inside the sliding frame being coaxial with a detection hole A on a vertical rod above the base plate.

[0006] Preferably, the front side of the mounting plate has an assembly groove, and the front ends of the mounting plate have front holes.

[0007] Preferably, a fixing plate is provided at the upper rear side of the mounting plate, the fixing plate overlaps on two sets of rectangular blocks on the rear side of the mounting plate, and bottom blocks are provided on both sides of the fixing plate, the bottom blocks are inserted into the rear slot; a movable pin is slidably installed on the rear inner side of the fixing plate.

[0008] Preferably, the bottom of the fixing frame is inserted and fixed into the assembly slot, and a lead screw for connecting the motor is rotatably installed in the adjustment slot at the top of the fixing frame.

[0009] Preferably, a double-ended lead screw is rotatably mounted inside the carrier plate, and control slots are provided on both sides of the inside of the carrier plate.

[0010] Preferably, the fixed shaft is fixedly installed at the middle position of the bottom of the carrier plate, and the fixed shaft has a positioning hole in a ring shape inside; clamping plates are provided on both sides of the carrier plate, each set of clamping plates is slidably engaged with the control groove, and the two sets of clamping plates are controlled by the double-headed screw inside the carrier plate. Lifting blocks are slidably installed inside the clamping plates through the screw, and pressure plates are installed on the lifting blocks through hinges. The pressure plates can rotate 90° on the lifting blocks, and the pressure plates are stored in the middle position of the clamping plates.

[0011] Preferably, the insertion rods are fixedly installed on both sides of the bottom of the substrate, and a vertical rod is provided on the left side of the substrate, with two sets of detection holes A at the upper end of the vertical rod.

[0012] Preferably, a movable seat is movably mounted inside the substrate via a lead screw, and a backing plate is slidably mounted inside the movable seat, the backing plate being able to extend from the top of the movable seat.

[0013] Preferably, a circular saw connected to a motor is rotatably mounted on the outer end of the sliding frame; a sliding groove is provided on the inner side of the sliding frame, and a movable rod is slidably mounted inside the sliding groove through a spring, the movable rod extending from the side end of the sliding frame.

[0014] Preferably, each end of the sliding frame is movably mounted with an independently movable contact block via springs. When the contact block is moved, its end can contact the side face of the circular saw. A through-hole detection hole B is provided on the side end of the contact block. A control switch is provided on the outside of the sliding frame near the end of the slide groove. The control switch is electrically connected to the motor that controls the rotation of the lead screw on the fixed frame. When the movable rod moves to the end of the slide groove, it can trigger the control switch. A lifting rod is slidably mounted on the inner side of the sliding frame. The bottom of both sides of the lifting rod is adjacent to the contact block.

[0015] This invention provides a high-precision cutting machine tool for the production of weighing instrument parts, which has the following beneficial effects: 1. In this invention, by setting a vertical rod with a detection hole A on the left side of the substrate, and cooperating with the movable rod on the sliding frame, the running trajectory of the sliding frame can be detected in real time during the process of the sliding frame driving the circular saw. When the movable rod cannot pass through the detection hole A, it indicates that the sliding frame is tilted. The movable rod will trigger the control switch to close the lead screw driving the sliding frame in the adjustment groove in time, which effectively avoids the problem of reduced part production accuracy caused by the decrease in the accuracy of the machine tool moving table, and reduces the part defect rate.

[0016] 2. In this invention, by sliding contact blocks at both ends of the sliding frame and setting detection holes B and lifting rods, by pushing the contact blocks to contact the end face of the circular saw and slowly rotating the circular saw, it is possible to observe whether both ends of the lifting rod can be inserted into the detection holes B at the same time. This allows for a direct assessment of whether the circular saw runs smoothly on the sliding frame and whether there are any problems such as shaking or deformation. This detection method can promptly detect minor deformations of the machine tool circular saw, avoid using a faulty circular saw for cutting and processing, and effectively ensure the quality of parts production. Attached Figure Description

[0017] The following accompanying drawings will provide a better understanding of the invention by those skilled in the art, and will more clearly demonstrate the advantages of the invention. The drawings described herein are for illustrative purposes only, representing selected embodiments and not all possible implementations, and are not intended to limit the scope of the invention.

[0018] In the attached diagram: Figure 1 A three-dimensional structural schematic diagram according to an embodiment of the present invention is shown.

[0019] Figure 2 A rear-view structural schematic diagram according to an embodiment of the present invention is shown.

[0020] Figure 3 An exploded structural diagram according to an embodiment of the present invention is shown.

[0021] Figure 4A schematic diagram of the connection structure between the mounting plate and the fixing bracket according to an embodiment of the present invention is shown.

[0022] Figure 5 A schematic diagram of the connection structure between the fixed frame and the sliding frame according to an embodiment of the present invention is shown.

[0023] Figure 6 A schematic diagram of the connection structure between the fixing plate and the carrier plate according to an embodiment of the present invention is shown.

[0024] Figure 7 A schematic diagram of the cross-sectional structure of the carrier plate according to an embodiment of the present invention is shown.

[0025] Figure 8 A schematic cross-sectional view of a substrate according to an embodiment of the present invention is shown.

[0026] Figure 9 A side view of the sliding frame structure according to an embodiment of the present invention is shown.

[0027] List of reference numerals 1. Mounting plate; 101. Rear slot; 102. Assembly slot; 1021. Front hole; 103. Fixing plate; 1031. Base block; 1032. Movable pin; 104. Fixing frame; 1041. Adjustment slot; 2. Carrier plate; 201. Control slot; 202. Fixing shaft; 2021. Positioning hole; 203. Clamping plate; 2031. Lifting block; 2032. Pressure plate; 3. Base plate; 301. Insert rod; 302. Upright rod; 3021. Detection hole A; 303. Moving seat; 3031. Support plate; 4. Sliding frame; 401. Circular saw; 402. Slide groove; 4021. Movable rod; 403. Contact block; 4031. Detection hole B; 404. Control switch; 405. Lifting rod. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1: Please refer to Figures 1 to 9 As shown: This invention provides a high-precision cutting machine tool for the production of weighing instrument parts, comprising: a mounting plate 1; the mounting plate 1 has a rectangular structure, and two sets of rectangular blocks are provided on the rear side of the mounting plate 1, each set of rectangular blocks having a rear groove 101 inside; a carrier plate 2 is provided on the mounting plate 1, the carrier plate 2 is provided on a fixed plate 103 on the rear side of the mounting plate 1, and a fixed shaft 202 on the outside of the carrier plate 2 is rotatably engaged with the fixed plate 103, and a positioning hole 2021 in the fixed shaft 202 can be inserted into the movable pin 1032 in the fixed plate 103; a base plate 3 is provided on the front side of the mounting plate 1, the base plate 3 is provided on the inner side of the front fixing frame 104 of the mounting plate 1, and an insertion rod 301 on the outside of the base plate 3 is inserted into the front hole 1021 on the mounting plate 1; a sliding frame 4 is movably mounted in the adjustment groove 1041 in the fixing frame 104 via a lead screw, and the movable rod 4021 inside the sliding frame 4 is on the same axis as the detection hole A3021 on the upright rod 302 above the base plate 3.

[0030] In embodiments of the present invention, such as Figures 3 to 5 As shown, the mounting plate 1 has an assembly groove 102 inside its front side, and front holes 1021 at both ends of its front side; a fixing plate 103 is provided at the upper rear side of the mounting plate 1, which overlaps two sets of rectangular blocks on the rear side of the mounting plate 1, and bottom blocks 1031 are provided at the bottom of both sides of the fixing plate 103, which are inserted into the rear groove 101; a movable pin 1032 is slidably installed on the rear side of the fixing plate 103; the bottom of the fixing bracket 104 is inserted into and fixed to the assembly groove 102, and a lead screw for connecting the motor is rotatably installed in the adjustment groove 1041 at the top of the fixing bracket 104; the mounting plate 1 allows the fixing bracket 104 to be installed on the mounting plate 1; the rear groove 101 allows the fixing plate 103 to be inserted into the rear end of the mounting plate 1; the assembly groove 102 allows the fixing bracket 103 to be installed in the mounting plate 1. 04. The substrate 3 is inserted into the front side of the mounting plate 1 through the assembly slot 102; a front hole 1021 is provided, and the substrate 3 can be fixed at the front end of the mounting plate 1 and the fixing frame 104 is limited by inserting the insertion rod 301 into the front hole 1021; a fixing plate 103 is provided, and the carrier plate 2 can be rotatably mounted on the fixing plate 103; a bottom block 1031 is provided, and the fixing plate 103 can be fixed on the mounting plate 1 by inserting the bottom block 1031 into the rear slot 101; a movable pin 1032 is provided, and the carrier plate 2 can be fixed on the fixing plate 103 by inserting the movable pin 1032 into the positioning hole 2021; a fixing frame 104 is provided, and the sliding frame 4 can be installed on the fixing frame 104; an adjustment slot 1041 is provided, and the position of the sliding frame 4 on the fixing frame 104 can be adjusted by adjusting the screw in the adjustment slot 1041.

[0031] In embodiments of the present invention, such as Figure 6 and Figure 7As shown, a double-ended lead screw is rotatably mounted inside the carrier plate 2, and control slots 201 are provided on both sides of the carrier plate 2. A fixed shaft 202 is fixedly installed at the middle position of the bottom of the carrier plate 2, and a positioning hole 2021 is provided in a ring shape inside the fixed shaft 202. Clamping plates 203 are provided on both sides of the carrier plate 2. Each set of clamping plates 203 is slidably engaged with the control slots 201, and the two sets of clamping plates 203 are controlled by the double-ended lead screw inside the carrier plate 2. A lifting block 2031 is slidably mounted inside the clamping plate 203 through the lead screw. A pressure plate 2032 is mounted on the lifting block 2031 through a hinge. The pressure plate 2032 can rotate 90° on the lifting block 2031, and the pressure plate 2032 is stored in the middle position of the clamping plate 203. The carrier plate 2 is provided so that the weighing parts to be cut and processed can be placed on the carrier plate 2 for processing. The weighing instrument is fixed in place to facilitate subsequent cutting and processing. A control groove 201 allows the clamping plate 203 to be movably installed onto both sides of the inner side of the carrier plate 2. A fixing shaft 202 allows the carrier plate 2 to be rotatably installed onto the fixing plate 103. Positioning holes 2021 allow the carrier plate 2 to be fixed onto the fixing plate 103 at different angles. The clamping plate 203 allows for horizontal clamping of the weighing instrument components, facilitating subsequent cutting and processing. A lifting block 2031 allows the pressure plate 2032 to be slidably installed onto the clamping plate 203. The pressure plate 2032, when unfolded, allows for vertical clamping and fixing of the weighing instrument components.

[0032] As a second embodiment of the present invention, based on the first embodiment, such as Figure 8 As shown, the insertion rod 301 is fixedly installed on both sides of the bottom of the substrate 3. A vertical rod 302 is provided on the left side of the substrate 3, and two sets of detection holes A3021 are provided at the upper end of the vertical rod 302. A movable seat 303 is movably installed inside the substrate 3 via a lead screw. A stop plate 3031 is slidably installed inside the movable seat 303, and the stop plate 3031 can extend from the top of the movable seat 303. The substrate 3 is provided so that the vertical rod 302 can be installed on it. The insertion rod 301 allows the substrate 3 to be inserted into the mounting plate 1. The vertical rod 302 has openings for movement. The detection hole A3021, coaxial with rod 4021, can detect the trajectory of the circular saw 401 when the sliding frame 4 moves and processes it, preventing the circular saw 401 from tilting. A movable seat 303 is provided, and a liftable abutment plate 3031 can be slidably installed inside the movable seat 303. The abutment plate 3031 is pushed out from the upper end of the movable seat 303. By pressing the front end of the part against the abutment plate 3031, the amount of the part protruding from the carrier plate 2 can be controlled, which facilitates subsequent cutting processing.

[0033] This application provides a base plate 3 for workpiece positioning at the front end of the mounting plate 1, and a vertical rod 302 with a detection hole A3021 on the left side of the base plate 3. When the sliding frame 4 drives the circular saw 401 forward, the movable rod 4021 will pass through the vertical rod 302. If the movable rod 4021 can pass through the detection hole A3021, it proves that the running trajectory of the sliding frame 4 on the fixed frame 104 is maintained well. If it cannot pass through the detection hole A3021, it proves that the sliding frame 4 tilts when it drives the circular saw 401 to move. At this time, the movable rod 4021 is limited. During the continuous movement of the sliding frame 4, it will contact the control switch 404 and trigger it, thereby preventing the sliding frame 4 with incorrect trajectory from continuing to drive the circular saw 401 to move.

[0034] As a third embodiment of the present invention, based on embodiment one, such as Figure 5 and Figure 9As shown, a circular saw 401 connected to a motor is rotatably mounted on the outer end of the sliding frame 4; a groove 402 is provided on the inner side of the sliding frame 4, and a movable rod 4021 is slidably mounted inside the groove 402 through a spring, and the movable rod 4021 can extend from the side end of the sliding frame 4; two ends of the sliding frame 4 are movably mounted with independently movable contact blocks 403 through springs, and when the contact blocks 403 are moved, their ends can contact the side end face of the circular saw 401; a through-hole detection hole B4031 is provided on the side end of the contact block 403; and a position on the outside of the sliding frame 4 near the end of the groove 402 is provided with... A control switch 404 is provided, which is electrically connected to the motor controlling the rotation of the lead screw on the fixed frame 104. When the movable rod 4021 moves to the end of the slide groove 402, it can trigger the control switch 404. A lifting rod 405 is slidably installed on the inner side of the sliding frame 4, and the bottom sides of the lifting rod 405 are adjacent to the contact blocks 403. A circular saw 401 can be installed on the sliding frame 4. By moving the sliding frame 4, the circular saw 401 can be driven to cut and process the weighing instrument parts. A slide groove 402 is provided so that the movable rod 4021 can slide through the slide groove 402. Installed inside the sliding frame 4; a movable rod 4021 is provided, which can be used to detect the accurate relative movement value between the sliding frame 4 and the upright rod 302. When the sliding frame 4 and the upright rod 302 are misaligned, the movable rod 4021 will be blocked by the upright rod 302 and trigger the control switch 404, thereby closing the lead screw driving the sliding frame 4 in the adjusting groove 1041 to prevent it from processing crop parts; a contact block 403 is provided, which can measure the circular trajectory of the circular saw 401 by simultaneously pressing two sets of contact blocks 403 against the circular saw 401; a detection hole B4031 is provided, through By observing whether the lifting rod 405 can penetrate the detection hole B4031, the operating status of the circular saw 401 reflected by the contact block 403 can be determined. A control switch 404 is set up so that when the control switch 404 is triggered by the movable rod 4021, the lead screw of the drive sliding frame 4 can be closed in time to prevent it from continuing to run on an incorrect running trajectory. A lifting rod 405 is set up so that by observing whether both ends of the lifting rod 405 can be inserted into the detection holes B4031 of the two sets of contact blocks 403 at the same time, it can be determined whether the circular saw 401 will tilt on the sliding frame 4.

[0035] This application uses contact blocks 403 slidably installed at both ends of the sliding frame 4 to detect the running status of the tool. At the same time, the contact blocks 403 on both sides are pushed to contact the end face of the circular saw 401, and the circular saw 401 is slowly rotated. At this time, the lifting rod 405 is slid down back and forth, and it is observed whether both ends can be inserted into the detection hole B4031 at the same time. If they can be inserted at the same time, it proves that the circular saw 401 rotates smoothly on the sliding frame 4. If the movable rod 4021 cannot be inserted into the two detection holes B4031 at the same time, it proves that the circular saw 401 is not running smoothly on the sliding frame 4 and has a shaking problem, which needs to be corrected in time. In this way, it can intuitively reflect whether there is a problem with the running status of the circular saw 401 on the sliding frame 4.

[0036] The specific usage and function of this embodiment are as follows: In this invention, such as Figures 1 to 9 As shown, the weighing instrument part to be cut is placed on the carrier plate 2. By rotating the double-headed screw inside the carrier plate 2, the clamping plate 203 is moved horizontally along the control groove 201 to initially clamp the part. Then, the lifting block 2031 is adjusted to lower and unfold the pressure plate 2032, further fixing the part vertically. At the same time, the abutment plate 3031 extending from the moving seat 303 on the base plate 3 controls the amount of the part protruding from the carrier plate 2. After the part is fixed, the screw connected to the motor in the top adjustment groove 1041 of the fixing frame 104 is activated to drive the sliding frame 4 to move, which drives the circular saw 401 rotatably mounted on its outer end to cut the part. During the movement of the circular saw 401 driven by the sliding frame 4, the movable rod 4021 is slidably mounted in the inner sliding groove 402 of the sliding frame 4 through the spring. The position of the movable rod 4021 is compared with that of the detection hole A3021 on the left side of the upright rod 302 of the substrate 3. If the movable rod 4021 can pass through the detection hole A3021, it means that the running trajectory of the sliding frame 4 is normal. If it cannot pass through, the movable rod 4021 will be blocked by the upright rod 302 and trigger the control switch 404 to shut off the lead screw driving the sliding frame 4 in time. In addition, before cutting or during the cutting interval, the two ends of the sliding frame 4 can be pushed to contact the side end face of the circular saw 401 through the contact block 403 installed by spring cooperation. The circular saw 401 is slowly rotated and the lifting rod 405 is slid down back and forth. It is observed whether both ends can be inserted into the detection hole B4031 on the side end of the contact block 403 at the same time to determine whether the running state of the circular saw 401 on the sliding frame 4 is stable. If there is a problem, it is corrected in time to ensure the accuracy and quality of the cutting process.

[0037] The following points should be noted in this article: 1. The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention; other structures can refer to general designs.

[0038] 2. Where there is no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0039] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A high-precision cutting machine tool for producing weighing instrument parts, comprising: Mounting plate (1); the mounting plate (1) is a rectangular structure, and two sets of rectangular blocks are provided on the rear side of the mounting plate (1), and a rear groove (101) is opened in the interior of each set of rectangular blocks; the mounting plate (1) is characterized in that a carrier plate (2) is provided on the mounting plate (1), the carrier plate (2) is provided on the fixing plate (103) on the rear side of the mounting plate (1), and the fixing shaft (202) outside the carrier plate (2) is rotatably engaged with the fixing plate (103), and the positioning hole (2021) in the fixing shaft (202) can be inserted into the movable pin (1032) in the fixing plate (103). The mounting plate (1) is provided with a base plate (3) on the front side. The base plate (3) is located inside the front fixing frame (104) of the mounting plate (1), and the insertion rod (301) outside the base plate (3) is inserted into the front hole (1021) on the mounting plate (1). A sliding frame (4) is installed in the adjustment groove (1041) inside the fixing frame (104) by means of a screw. The movable rod (4021) inside the sliding frame (4) is on the same axis as the detection hole A (3021) on the upright rod (302) above the base plate (3).

2. The high-precision cutting machine tool for producing weighing instrument parts according to claim 1, characterized in that: The mounting plate (1) has an assembly groove (102) inside the front side, and front holes (1021) are provided at both ends of the front side of the mounting plate (1).

3. A high-precision cutting machine tool for producing weighing instrument parts according to claim 1, characterized in that: A fixing plate (103) is provided on the upper rear side of the mounting plate (1). The fixing plate (103) overlaps on two sets of rectangular blocks on the rear side of the mounting plate (1). Bottom blocks (1031) are provided on both sides of the bottom of the fixing plate (103). The bottom blocks (1031) are inserted into the rear groove (101). A movable pin (1032) is slidably installed on the rear side inside the fixing plate (103).

4. A high-precision cutting machine tool for producing weighing instrument parts according to claim 2, characterized in that: The bottom of the fixing frame (104) is inserted and fixed to the assembly groove (102), and a lead screw for connecting the motor is rotatably installed in the adjustment groove (1041) at the top of the fixing frame (104).

5. A high-precision cutting machine tool for producing weighing instrument parts according to claim 1, characterized in that: The carrier plate (2) is rotatably mounted with a double-headed lead screw, and control slots (201) are provided on both sides of the inside of the carrier plate (2).

6. A high-precision cutting machine tool for producing weighing instrument parts according to claim 5, characterized in that: The fixed shaft (202) is fixedly installed at the middle position of the bottom of the carrier plate (2), and the fixed shaft (202) has a positioning hole (2021) in a ring shape inside; clamping plates (203) are provided on both sides of the carrier plate (2), each set of clamping plates (203) slides with the control groove (201), and the two sets of clamping plates (203) are controlled by the double-headed screw inside the carrier plate (2). The lifting block (2031) is slidably installed inside the clamping plate (203) through the screw. The lifting block (2031) is mounted with a pressure plate (2032) through a hinge. The pressure plate (2032) can rotate 90° on the lifting block (2031), and the pressure plate (2032) is stored in the middle position of the clamping plate (203).

7. A high-precision cutting machine tool for producing weighing instrument parts according to claim 1, characterized in that: The insertion rod (301) is fixedly installed on both sides of the bottom of the substrate (3). A vertical rod (302) is provided on the left side of the substrate (3). Two sets of detection holes A (3021) are provided at the upper end of the vertical rod (302).

8. A high-precision cutting machine tool for producing weighing instrument parts according to claim 1, characterized in that: The substrate (3) is equipped with a movable seat (303) inside by a lead screw. A stop plate (3031) is slidably installed inside the movable seat (303). The stop plate (3031) can extend from the top of the movable seat (303).

9. A high-precision cutting machine tool for producing weighing instrument parts according to claim 1, characterized in that: The outer end of the sliding frame (4) is rotatably mounted with a circular saw (401) connected to a motor; the inner side of the sliding frame (4) is provided with a sliding groove (402), and a movable rod (4021) is slidably mounted inside the sliding groove (402) through a spring, and the movable rod (4021) can extend out from the side end of the sliding frame (4).

10. A high-precision cutting machine tool for producing weighing instrument parts according to claim 4 or 9, characterized in that: The sliding frame (4) has independently movable contact blocks (403) installed at both ends by springs. When the contact block (403) is moved, its end can contact the side end face of the circular saw (401). The side end of the contact block (403) is provided with a through detection hole B (4031). A control switch (404) is provided on the outside of the sliding frame (4) near the end of the slide groove (402). The control switch (404) is electrically connected to the motor that controls the rotation of the lead screw on the fixed frame (104). When the movable rod (4021) moves to the end of the slide groove (402), it can trigger the control switch (404). A lifting rod (405) is slidably installed on the inner side of the sliding frame (4). The bottom of both sides of the lifting rod (405) is adjacent to the contact block (403).

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