A high-precision cutting machine tool for weighing instrument parts production

Abstract

The application provides a high-precision cutting machine tool for weighing instrument part production, and relates to the technical field of machine tool processing, which comprises a mounting plate; the mounting plate is of a rectangular structure, and the rear side of the mounting plate is provided with two groups of rectangular blocks; a vertical rod with a detection hole A is arranged on the left side of the base plate; the operation trajectory of the sliding frame can be detected in real time during the movement of the sliding frame driven by the circular saw; when the movable rod cannot pass through the detection hole A, it indicates that the sliding frame moves obliquely; the movable rod triggers the control switch, and the lead screw driving the sliding frame in the adjusting groove is closed in time, thereby effectively avoiding the problem of reduced part production precision caused by the decrease in the precision of the moving table, reducing the part failure rate, and solving the problem that the moving precision of the moving table of the sawing machine driving cutting device gradually decreases after long-term use; if the problem is not detected in time, the part production precision will be reduced in the subsequent processing process, and the part failure rate will increase.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machine tool processing, in particular to a high-precision cutting machine tool for weighing instrument part production. BACKGROUND

[0002] As an important measuring instrument, weighing instruments are widely used in industrial production, commercial trade, transportation, medical treatment and health care, etc. The processing quality of weighing instrument basic parts directly determines the overall performance of the weighing instrument. The size precision and surface quality of the parts are key parameters for the weighing accuracy and service life of the weighing instrument. In the processing flow of weighing instrument basic parts, cutting processing is an indispensable important link. Circular saw machine tools are core equipment for realizing part cutting. Through high-speed rotation of the circular saw blade, metal or non-metal materials are cut to process raw materials into part blanks with specific size and shape according to design requirements. The working principle is to use the saw teeth on the circular saw blade to generate friction and cutting action with the material surface to gradually realize material separation. In actual production, circular saw machine tools have the advantages of high cutting efficiency, relatively stable cutting precision, wide range of processable materials, etc., and have become one of the commonly used equipment for cutting and processing of weighing instrument basic parts.

[0003] However, the current circular saw machine tool for cutting and processing of weighing instrument basic parts still has the following technical problems:

[0004] Firstly, the moving table driving the cutting component will gradually decrease in movement precision after long-term use. If it is not detected in time, it will lead to reduced part production precision in the subsequent processing process, and thus increase the part failure rate.

[0005] Secondly, the circular saw of the cutting machine tool is prone to slight deformation during long-term use. Since the deformation is relatively subtle, it is difficult to directly observe and judge by naked eye. Using the circular saw with deformation for cutting processing will adversely affect the part production quality. SUMMARY

[0006] In view of the above problems, one object of the present application is to overcome these shortcomings, and more specifically to provide a high-precision cutting machine tool for weighing instrument part production, which can detect the running state of the sliding frame and the circular saw through the detection structure, and improve the precision of the cutting device for weighing instrument part processing.

[0007] The application discloses a high-precision cutting machine for weighing instrument part production.

[0008] Preferably, the front side of the mounting plate is internally provided with an assembly groove, and the front side of the mounting plate is provided with front holes at both ends.

[0009] Preferably, the rear side of the mounting plate is provided with a fixed plate at the upper end, the fixed plate is lapped on the two groups of rectangular blocks at the rear side of the mounting plate, the bottom of the two sides of the fixed plate is provided with a bottom block, the bottom block is inserted into the rear groove, and the rear side of the inside of the fixed plate is slidably provided with a movable pin.

[0010] Preferably, the bottom of the fixed frame is inserted into the assembly groove and fixed, and the adjusting groove in the top of the fixed frame is rotatably provided with a lead screw connected with a motor.

[0011] Preferably, the inside of the mounting plate is rotatably provided with a double-end lead screw, and the inside of the mounting plate is provided with a control groove at both sides.

[0012] Preferably, the fixed shaft is fixedly installed at the middle position of the bottom of the mounting plate, the inside of the fixed shaft is annularly provided with a positioning hole, the two sides of the mounting plate are provided with clamping plates, each group of clamping plates is slidably matched with the control groove, the two groups of clamping plates are controlled by the double-end lead screw in the inside of the mounting plate, the inside of the clamping plate is slidably provided with a lifting block through the lead screw, the pressing plate is rotatably installed on the lifting block through a hinge, the pressing plate can be rotated by 90 degrees on the lifting block, and the pressing plate is accommodated at the middle position of the clamping plate.

[0013] Preferably, the plug rod is fixedly arranged at the bottom of the two sides of the base plate, the left side of the base plate is provided with a vertical rod, and the upper end of the vertical rod is provided with two groups of detection holes A.

[0014] Preferably, the inside of the base plate is movably provided with a moving seat through a lead screw, the inside of the moving seat is slidably provided with an abutting plate, and the abutting plate can be stretched out from the top of the moving seat.

[0015] Preferably, the outer end of the sliding frame is rotatably provided with a circular saw connected with a motor, and the inner side of the sliding frame is provided with a sliding groove, the inside of the sliding groove is slidably provided with a movable rod through spring cooperation, and the movable rod can be stretched out from the side end of the sliding frame.

[0016] Preferably, the two ends of the sliding frame are movably installed with independently movable contact blocks through spring cooperation, and when the contact blocks are moved, the ends thereof can be in contact with the side end face of the circular saw; the side end of the contact block is provided with a through detection hole B; a control switch is arranged at the position close to the end of the sliding groove outside the sliding frame, and the control switch is electrically connected with the motor for controlling the rotation of the fixed frame screw, and when the movable rod moves to the end of the sliding groove, the control switch can be triggered; the inner side of the sliding frame is slidably installed with a lifting rod, and the two side bottoms of the lifting rod are adjacent to the contact blocks.

[0017] The application provides a high-precision cutting machine tool for balance part production.

[0018] 1、In the application, the vertical rod with the detection hole A is arranged on the left side of the base plate, and the movable rod on the sliding frame is matched, so that the running track of the sliding frame can be detected in real time during the movement of the sliding frame driving the circular saw, when the movable rod cannot pass through the detection hole A, it is indicated that the sliding frame moves to be inclined, the movable rod triggers the control switch, the screw for driving the sliding frame in the adjusting groove is closed in time, the problem that the part production precision is reduced due to the decrease of the precision of the machine tool moving table is effectively avoided, and the part defective rate is reduced.

[0019] 2、In the application, the contact blocks are slidably installed at the two ends of the sliding frame, and the detection hole B and the lifting rod are arranged, the contact block is pushed to be in contact with the end face of the circular saw, the circular saw is slowly rotated, and whether the two ends of the lifting rod can be inserted into the detection hole B is observed, so that whether the circular saw runs stably on the sliding frame or whether problems such as shaking and deformation exist can be directly judged, the slight deformation of the machine tool circular saw can be found in time, the cutting processing of the circular saw with problems is avoided, and the part production quality is effectively guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0020] The application will be better understood by one of ordinary skill in the art through the following drawings, and the advantages of the application will be more clearly embodied. The drawings described herein are only for the purpose of illustrating selected embodiments and are not intended to limit the scope of the application.

[0021] In the drawings:

[0022] Figure 1 A perspective structural schematic view according to an embodiment of the application is shown.

[0023] Figure 2 A rear view structural schematic view according to an embodiment of the application is shown.

[0024] Figure 3 An exploded structural schematic view according to an embodiment of the application is shown.

[0025] Figure 4Fig. 1 shows a schematic diagram of a mounting plate and fixed frame connecting structure according to an embodiment of the present application.

[0026] Figure 5 Fig. 2 shows a schematic diagram of a fixed frame and sliding frame connecting structure according to an embodiment of the present application.

[0027] Figure 6 Fig. 3 shows a schematic diagram of a fixed plate and carrier plate connecting structure according to an embodiment of the present application.

[0028] Figure 7 Fig. 4 shows a schematic diagram of a carrier plate cross-sectional structure according to an embodiment of the present application.

[0029] Figure 8 Fig. 5 shows a schematic diagram of a base plate cross-sectional structure according to an embodiment of the present application.

[0030] Figure 9 Fig. 6 shows a schematic diagram of a sliding frame side view structure according to an embodiment of the present application.

[0031] List of reference signs

[0032] 1, mounting plate; 101, rear slot; 102, assembly slot; 1021, front hole; 103, fixed plate; 1031, bottom block; 1032, movable pin; 104, fixed frame; 1041, adjusting slot; 2, carrier plate; 201, control slot; 202, fixed shaft; 2021, positioning hole; 203, clamping plate; 2031, lifting block; 2032, pressing plate; 3, base plate; 301, insertion rod; 302, vertical rod; 3021, detection hole A; 303, moving seat; 3031, abutting plate; 4, sliding frame; 401, circular saw; 402, sliding groove; 4021, movable rod; 403, contact block; 4031, detection hole B; 404, control switch; 405, lifting rod. DETAILED DESCRIPTION

[0033] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application.

[0034] Embodiment one: please refer to Figures 1 to 9 as shown:

[0035] The application provides a high-precision cutting machine tool for weighing instrument part production, which comprises a mounting plate 1; the mounting plate 1 is of a rectangular structure, and the rear side of the mounting plate 1 is provided with two groups of rectangular blocks, and each group of the rectangular blocks is internally provided with a rear slot 101; a carrier plate 2 is arranged on the mounting plate 1, the carrier plate 2 is arranged on a fixing plate 103 at the rear side of the mounting plate 1, a fixing shaft 202 at the outside of the carrier plate 2 is rotationally matched with the fixing plate 103, and a positioning hole 2021 in the fixing shaft 202 is insertedly matched with a movable pin 1032 in the fixing plate 103; a base plate 3 is arranged at the front side of the mounting plate 1, the base plate 3 is arranged at the inside of a fixing frame 104 at the front side of the mounting plate 1, and an inserting rod 301 at the outside of the base plate 3 is insertedly matched with a front hole 1021 on the mounting plate 1; a sliding frame 4 is movably arranged on a adjusting slot 1041 in the fixing frame 104, and a movable rod 4021 at the inside of the sliding frame 4 is on the same axis as a detection hole A3021 on an upright rod 302 above the base plate 3.

[0036] As shown in the embodiment of the application, Figures 3 to 5 the inside of the front side of the mounting plate 1 is provided with an assembling slot 102, and the two ends of the front side of the mounting plate 1 are provided with front holes 1021; the upper end of the rear side of the mounting plate 1 is provided with a fixing plate 103, the fixing plate 103 is overlapped on the two groups of rectangular blocks at the rear side of the mounting plate 1, the two sides of the bottom of the fixing plate 103 are provided with bottom blocks 1031, the bottom blocks 1031 are insertedly matched with the rear slots 101; the inside of the rear side of the fixing plate 103 is slidably provided with movable pins 1032; the bottom of the fixing frame 104 is insertedly fixed with the assembling slot 102, a lead screw connected with a motor is rotationally arranged in the adjusting slot 1041 at the top of the fixing frame 104; the mounting plate 1 is arranged, the fixing frame 104 can be arranged on the mounting plate 1; the rear slots 101 are arranged, the fixing plate 103 can be insertedly arranged at the rear end of the mounting plate 1 through the rear slots 101; the assembling slots 102 are arranged, the fixing frame 104 can be insertedly arranged at the front side of the mounting plate 1 through the assembling slots 102; the front holes 1021 are arranged, the base plate 3 can be fixed at the front end of the mounting plate 1 by insertingly combining the inserting rod 301 with the front hole 1021, and the fixing frame 104 is limited; the fixing plate 103 is arranged, the carrier plate 2 can be rotationally arranged on the fixing plate 103; the bottom blocks 1031 are arranged, the fixing plate 103 can be fixed on the mounting plate 1 by insertingly connecting the bottom blocks 1031 with the rear slots 101; the movable pins 1032 are arranged, the carrier plate 2 can be fixed on the fixing plate 103 by insertingly combining the movable pins 1032 with the positioning holes 2021; the fixing frame 104 is arranged, the sliding frame 4 can be arranged on the fixing frame 104; the adjusting slots 1041 are arranged, the position of the sliding frame 4 on the fixing frame 104 can be adjusted by the lead screw in the adjusting slot 1041.

[0037] As shown in the embodiment of the application, Figure 6 and Figure 7As shown, the double-end screw is rotatably installed in the inside of the carrier plate 2, and control grooves 201 are formed on both sides of the inside 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 annularly formed in the inside of the fixed shaft 202; clamping plates 203 are arranged on both sides of the carrier plate 2, each group of clamping plates 203 is in sliding fit with the control grooves 201, and the two groups of clamping plates 203 are controlled by the double-end screw in the inside of the carrier plate 2; a lifting block 2031 is slidably installed in the inside of the clamping plate 203 through the screw, a pressing plate 2032 is hingedly installed on the lifting block 2031, the pressing plate 2032 can rotate 90° on the lifting block 2031, and the pressing plate 2032 is stored at the middle position of the clamping plate 203; the carrier plate 2 is arranged, the weighing instrument parts to be cut can be placed on the carrier plate 2 for fixation, so that subsequent cutting is facilitated; the control grooves 201 are arranged, the clamping plates 203 can be movably installed in the inside of the carrier plate 2 through the control grooves 201; the fixed shaft 202 is arranged, the carrier plate 2 can be rotatably installed on the fixed plate 103 through the fixed shaft 202; the positioning hole 2021 is arranged, the carrier plate 2 can be fixed on the fixed plate 103 at different angles through the positioning hole 2021; the clamping plates 203 are arranged, the weighing instrument parts can be clamped in the horizontal direction by moving the clamping plates 203, and subsequent cutting is facilitated; the lifting block 2031 is arranged, the pressing plate 2032 can be slidably installed on the clamping plate 203 through the lifting block 2031; the pressing plate 2032 is arranged, the weighing instrument parts can be clamped and fixed in the vertical direction when the pressing plate 2032 is unfolded.

[0038] As a second embodiment of the present application, on the basis of the first embodiment, Figure 8 As shown, the plug rods 301 are fixedly arranged on both sides of the bottom of the base plate 3, a vertical rod 302 is arranged on the left side of the base plate 3, and two groups of detection holes A3021 are arranged on the upper end of the vertical rod 302; a moving seat 303 is movably installed in the inside of the base plate 3 through a screw, and a resisting plate 3031 is slidably installed in the inside of the moving seat 303; the resisting plate 3031 can be pushed out from the top of the moving seat 303; the base plate 3 is arranged, the vertical rod 302 can be arranged on the base plate 3; the plug rods 301 are arranged, the base plate 3 can be inserted and installed on the mounting plate 1 through the plug rods 301; the vertical rod 302 is arranged, and the detection holes A3021 coaxial with the movable rods 4021 are formed on the vertical rod 302; when the sliding frame 4 drives the circular saw 401 to move for processing, the detection holes A3021 can detect the moving track, so as to prevent the sliding frame 4 from driving the circular saw 401 to move obliquely; the moving seat 303 is arranged, and the resisting plate 3031 that can be lifted is slidably installed in the inside of the moving seat 303; the resisting plate 3031 is pushed out from the top of the moving seat 303, the front end of the part is abutted against the resisting plate 3031, the extending amount of the part from the carrier plate 2 can be controlled, and subsequent cutting is facilitated.

[0039] The application sets the base plate 3 for workpiece positioning at the front end of the mounting plate 1, and sets the vertical rod 302 with detection hole A3021 at the left side of the base plate 3. When the sliding frame 4 drives the circular saw 401 to move, 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 track of the sliding frame 4 on the fixed frame 104 is good. If it cannot pass through the detection hole A3021, it proves that the sliding frame 4 inclines when driving the circular saw 401 to move. At this time, the movable rod 4021 is limited, and in the process of continuous movement of the sliding frame 4, it will contact and trigger the control switch 404, thereby preventing the sliding frame 4 with incorrect track from continuing to drive the circular saw 401 to move.

[0040] As a third embodiment of the application, on the basis of the first embodiment, as Figure 5 and Figure 9The outer end of the sliding frame 4 is rotatably installed with a circular saw 401 connected with a motor; the inner side of the sliding frame 4 is provided with a sliding groove 402, the inside of the sliding groove 402 is slidably installed with a movable rod 4021 through spring cooperation, the movable rod 4021 can extend from the side end of the sliding frame 4; the two ends of the sliding frame 4 are movably installed with independently movable contact blocks 403 through spring cooperation, when the contact blocks 403 are moved, the end thereof can be in contact with the side end face of the circular saw 401; the side end of the contact block 403 is provided with a through detection hole B4031; the position close to the end of the sliding groove 402 on the outer side of the sliding frame 4 is provided with a control switch 404, the control switch 404 is electrically connected with the motor for controlling the rotation of the lead screw on the fixed frame 104, when the movable rod 4021 is moved to the end of the sliding groove 402, the control switch 404 can be triggered; the inner side of the sliding frame 4 is slidably installed with a lifting rod 405, the two side bottoms of the lifting rod 405 are adjacent to the contact blocks 403; the sliding frame 4 is provided, the circular saw 401 can be arranged on the sliding frame 4, the sliding frame 4 is moved, the circular saw 401 can be driven to cut and process the parts of the weighing apparatus; the sliding groove 402 is provided, the movable rod 4021 can be slidably installed to the inner side of the sliding frame 4 through the sliding groove 402; the movable rod 4021 is provided, which can be used for detecting the relative movement accuracy value of the sliding frame 4 and the vertical rod 302, when the sliding frame 4 and the vertical rod 302 are misaligned, the movable rod 4021 will be blocked by the vertical rod 302, and the control switch 404 is triggered, so that the lead screw for driving the sliding frame 4 in the adjusting groove 1041 is closed, preventing the parts of the workpiece from being processed; the contact blocks 403 are provided, the circular trajectory of the circular saw 401 can be measured by simultaneously abutting the two groups of contact blocks 403 on the circular saw 401; the detection hole B4031 is provided, whether the lifting rod 405 can penetrate the detection hole B4031 can be observed, so that the running state of the circular saw 401 reflected by the contact blocks 403 can be judged; the control switch 404 is provided, when the control switch 404 is triggered by the movable rod 4021, the lead screw for driving the sliding frame 4 can be closed in time, preventing the lead screw from continuing to run in the wrong running track; the lifting rod 405 is provided, whether the two ends of the lifting rod 405 can be simultaneously inserted into the detection holes B4031 of the two groups of contact blocks 403 can be observed, so that whether the circular saw 401 will be inclined on the sliding frame 4 can be judged.

[0041] 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.

[0042] The specific usage and function of this embodiment are as follows:

[0043] 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.

[0044] The following points should be noted in this article:

[0045] 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.

[0046] 2. Embodiments of the application and features in embodiments can be combined with each other, without conflict, to obtain new embodiments.

[0047] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection 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 inside 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 set 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) inside the fixing shaft (202) can be inserted into the movable pin (1032) inside the fixing plate (103), a double-headed screw is rotatably installed inside the carrier plate (2), and control grooves (201) are opened on both sides inside the carrier plate (2); the mounting plate (1) is characterized in that a carrier plate (2) is provided on the mounting plate (1), and the mounting plate (1) is rotatably engaged with the fixed plate (103), and a rear groove (101) is opened inside the mounting plate (2); 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 inside each set of rectangular blocks; ... 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 the annular 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 groove (201), and the two sets of clamping plates (203) are controlled by the double-headed screw inside the carrier plate (2). A lifting block (2031) is slidably installed inside the clamping plate (203) through the screw, and a pressure plate (2032) is installed 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 in the middle position of the clamping plate (203). The mounting plate (1) is equipped with a base plate (3) on its front side. The base plate (3) is located inside the front fixing frame (104) of the mounting plate (1). The insertion rod (301) on the outside of the base plate (3) is inserted into the front hole (1021) on the mounting plate (1). The insertion rod (301) is fixedly located on both sides of the bottom of the base plate (3). The left side of the base plate (3) is equipped with a vertical rod (302). The upper end of the vertical rod (302) is equipped with two sets of detection holes A (3021). A sliding frame (4) is movably installed in the adjustment groove (1041) inside the fixing frame (104) through a screw. The movable rod (4021) inside the sliding frame (4) is connected to the base plate (3). The detection holes A (3021) on the upper upright (302) are on the same axis. A circular saw (401) connected to a motor is rotatably mounted on the outer end of the sliding frame (4). A sliding groove (402) is provided on the inner side of the sliding frame (4). A movable rod (4021) is slidably mounted inside the sliding groove (402) through a spring. The movable rod (4021) can extend out from the side end of the sliding frame (4). Two independently movable contact blocks (403) are movably mounted on both ends of the sliding frame (4) through a spring. When the contact block (403) is moved, its end can contact the side end face of the circular saw (401). A through detection hole B (4031) is provided on the side end of the contact block (403).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 sides of the lifting rod (405) are adjacent to the contact blocks (403).

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 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).

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