An electric cutting device for thin bar material

Abstract

The invention discloses an electric sample shearing device for thin bar materials, on which the thin bar material sample is fixed for shearing, comprising a base frame, on which a cutting assembly and a sample feeding assembly are arranged; the cutting assembly comprises a cam and a main motor, a connecting rod is arranged outside the cam, a compression spring is arranged on the connecting rod, the connecting rod reciprocates during the compression and resetting process of the compression spring, a movable cutter head is arranged at one end of the connecting rod, a fixed cutter head is arranged relatively fixed to the movable cutter head, and the blade of the movable cutter head is directly opposite to the blade of the fixed cutter head. The invention reduces the manual labor intensity and improves the shearing efficiency of thin bar materials.

Description

Technical Field

[0001] The invention belongs to the technical field of bar shearing devices and relates to an electric sample shearing device for thin bar materials. Background Art

[0002] Gaseous elements such as oxygen, nitrogen, and hydrogen in metals and alloys have a great influence on the physical and mechanical properties of the materials and should be strictly controlled during the refining process. According to relevant standards and specifications, to determine gaseous elements such as oxygen, nitrogen, and hydrogen in metals and alloys, first use wire cutting to cut strip block samples from the incoming material, then use a lathe to turn the block sample into a certain specification of thin rod material, and finally cut the thin rod material into granular samples, which are the final samples for analysis.

[0003] Among the above processes of cutting, cutting, turning and bar shearing, except bar shearing which is done manually, other processes are all motorized or automated. As for manual cutting, it is not only time-consuming and laborious, but also prone to occupational diseases such as tenosynovitis and cervical spondylitis in long-term operation, especially for some low-steel or carbon steel bars, which are difficult to cut due to their high hardness and are more likely to wear wrists, elbows and other parts. Some alloys are relatively soft, and after shearing, they may still be connected. In this case, pliers are needed to repeatedly tear and twist them to break them. Secondly, the weight of the granular sample for analysis is stipulated in the standard method, but the cutting point cannot be accurately determined when shearing the sample. As a result, the cut granular samples will be uneven and of varying weights. Furthermore, during the sample cutting process, if the granular sample to be cut is not fixed or wrapped, it will bounce or eject in random directions and may bounce towards weak parts of the human body such as the eyes and ears, or the screen, lines, and gaps of the equipment. This poses a certain safety hazard. In addition, if the sample that pops out is contaminated or lost, it will have to be re-cut.

[0004] As far as the current market is concerned, there is basically no equipment or device that can replace or improve the manual cutting of samples. In order to solve the many problems existing in the manual cutting of samples, it is necessary to design a kind of electrically controllable cutting device. Summary of the invention

[0005] The purpose of the present invention is to provide an electric sample shearing device for thin bar materials, which reduces the manual work intensity and improves the shearing efficiency of the thin bar materials.

[0006] The technical solution adopted by the present invention is an electric sample shearing device for thin bar materials, on which the thin bar material sample is fixed for shearing, comprising a base frame, on which a cutting component and a sample feeding component are arranged;

[0007] The cutting assembly includes a cam and a main motor. A connecting rod is arranged on the outer side of the cam. A compression spring is arranged on the connecting rod. The connecting rod reciprocates during compression and resetting of the compression spring. A movable cutter head is arranged at one end of the connecting rod. A fixed cutter head is arranged relatively fixed to the movable cutter head. The blade of the movable cutter head is directly opposite to the blade of the fixed cutter head.

[0008] The present invention is also characterized in that:

[0009] Two vertically parallel support plates are arranged at the corresponding positions of the cam on the base frame, and cam shafts are arranged on the two support plates. Cam shaft holes are opened at corresponding positions of equal height on the two support plates, and the cam shaft passes through the cam and the cam shaft holes. The cam shaft is located on the axis of the cam and is fixed to the cam, and the cam shaft is connected to the main motor.

[0010] A cutter head bracket is set at a position corresponding to the cutter head on the base frame, and a connecting rod hole and a bar sample hole are opened on the cutter head bracket. The bar sample hole is located between the movable cutter head and the fixed cutter head, and the thin bar sample passes through the bar sample hole, and the connecting rod passes through the connecting rod hole. A cutter head base is fixed at one end of the connecting rod, and a movable cutter head is fixed at the other end. The cutter head base is close to the cam and is located outside the cam. The compression spring and the movable cutter head are respectively located on both sides of the connecting rod hole, and one end of the compression spring is fixed to the cutter head base, and the other end is fixed to the cutter head bracket.

[0011] The cutter head bracket is provided with a cutter head slot, and the fixed cutter head is fixed on the cutter head bracket through the cutter head slot.

[0012] A protective cover is arranged on the cutter head support, and the protective cover is close to the sample hole of the bar material.

[0013] The protective cover is provided with a rectangular opening, and the front end of the thin rod sample extends into the protective cover through the rectangular opening. A collecting pool is arranged at the lowest point of the protective cover, and the protective cover is also provided with a bucket-shaped pouring opening, which is arranged at one side of the collecting pool.

[0014] The injection assembly includes a horizontally arranged injection rod, a clamping seat is arranged at the front end of the injection rod, a rod barrel is sleeved at the rear end of the injection rod, the injection rod and the rod barrel are coaxially arranged, the rear end of the injection rod can move in the rod barrel, the rod barrel is fixed on the base frame, a plurality of tooth grooves are opened in the middle part of the injection rod along its length direction, a wedge-shaped rotating shaft is arranged at a corresponding position in the middle part of the injection rod, the wedge-shaped part of the wedge-shaped rotating shaft matches the tooth groove, the wedge-shaped rotating shaft is connected to a secondary motor, and the rotation of the wedge-shaped rotating shaft drives the injection rod to move linearly along its length direction.

[0015] The plurality of tooth grooves are evenly and equidistantly arranged.

[0016] A sampling bracket is arranged at a position corresponding to the middle of the sampling rod on the base frame, a wedge-shaped shaft hole and a sampling rod hole are provided on the sampling bracket, the wedge-shaped shaft is arranged on the sampling bracket through the wedge-shaped shaft hole, the auxiliary motor is fixed on the sampling bracket, the sampling rod passes through the sampling rod hole, the clamping seat and the rod barrel are respectively located on both sides of the sampling rod hole, the end of the thin rod sample is fixed by the clamping seat, a fixed plate is vertically arranged at a position corresponding to the end of the rod barrel on the base frame, the front end of the rod barrel is an opening, and the end of the rod barrel is fixed on the fixed plate.

[0017] The clamping seat comprises four clamping fingers arranged along the length direction of the injection rod, the four clamping fingers are evenly distributed on the end surface of the injection rod in a circumference, and locking rings are sleeved outside the four clamping fingers.

[0018] The beneficial effects of the present invention are:

[0019] The present invention discloses an electric sample shearing device for thin rods. Except for the loading and removing operations of the rod samples, the other sample shearing operations of the device are completed by the device itself, and the loading and removing operations of the rod samples can also be completed quickly, which greatly saves manpower and work intensity. Compared with manual sample shearing, the device adopts electric shearing, which improves the shearing efficiency of the rod samples and improves the cutting effect of the samples. The design of the sampling component part of the device realizes the uniform shearing of the rod samples, so that the size of the granular samples after shearing is uniform. The shearing part of the device is designed with a protective cover to prevent the granular samples from bouncing during the sample shearing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an electric sample cutting device for thin bar materials of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a base frame in an electric sample shearing device for thin bar materials of the present invention;

[0022] Figure 3 It is a structural schematic diagram of a cutter head support in an electric sample shearing device for thin bar material of the present invention;

[0023] Figure 4 yes Figure 3 Sectional view of the circular section AA in the middle;

[0024] Figure 5 yes Figure 3 Sectional view of the circular section of the BB

[0025] Figure 6 It is a structural schematic diagram of a part of a clamping seat in an electric sample shearing device for thin bar material of the present invention;

[0026] Figure 7 It is a structural schematic diagram of the middle part of the sample introduction rod in an electric sample shearing device for thin bar material of the present invention;

[0027] Figure 8 The invention discloses a state diagram of a connecting rod and a sample feeding rod in one operation cycle of an electric sample shearing device for thin bar materials during an electric sample shearing process.

[0028] In the figure, 1. base frame, 2. wedge-shaped shaft, 3. rod barrel, 4. auxiliary motor, 5. injection rod, 6. locking ring, 7. thin bar sample, 8. fixed cutter head, 9. movable cutter head, 10. connecting rod, 11. gasket, 12. compression spring, 13. cutter head base, 14. cam, 15. main motor, 16. wedge-shaped shaft hole, 17. injection rod hole, 18. bar sample hole, 19. cutter head slot, 20. connecting rod hole, 21. cam shaft hole, 22. tooth groove, 23. clamping seat, 24. protective cover, 25. rectangular opening, 26. collecting tank, 27. bucket-shaped pouring mouth. DETAILED DESCRIPTION

[0029] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] The technical solution adopted by the present invention is an electric shearing device for thin bar material, on which the thin bar material sample 7 is fixed for shearing. Figure 1 As shown, it includes a base frame 1, on which a cutting component and a sample injection component are arranged.

[0031] The cutting assembly includes a cam 14 and a high-power main motor 15, such as Figure 2 As shown, two vertically parallel support plates are arranged at the corresponding positions of the cam 14 on the base frame 1, and cam shafts are arranged on the two support plates. Cam shaft holes 21 are correspondingly opened at equal height positions on the two support plates, and the cam shaft passes through the cam 14 and the cam shaft hole 21. The cam shaft is located at the axis of the cam 14 and is fixed to the cam 14. The cam shaft is connected to the main motor 15. A connecting rod 10 is arranged on the outer side of the cam 14, and a compression spring 12 is arranged on the connecting rod 10. One end of the compression spring 12 is fixed to the cutter head base 13, and the other end is fixed to the cutter head bracket. In order to ensure the stable, safe and efficient operation of the compression process of the compression spring 12 A gasket can be fixedly set on one side of the cutter head bracket, and the gasket 11 is located between the compression spring 12 and the cutter head bracket. During the compression and resetting process of the compression spring 12, the connecting rod 10 reciprocates. A cutter head base 13 is fixed at one end of the connecting rod 10, and a movable cutter head 9 is fixed at the other end. A fixed cutter head 8 is fixedly set relative to the movable cutter head 9, and the blade of the movable cutter head 9 is directly opposite to the blade of the fixed cutter head 8. When the cam 14 acts on the cutter head base 13 at the maximum radial position, the tips of the movable cutter head 9 and the fixed cutter head 8 are in pressure-free contact. The cam 14 rotates one circle to realize a shearing operation of the movable cutter head 9 and the fixed cutter head 8.

[0032] A cutter head bracket is set at a position corresponding to the cutter head on the base frame 1, and a connecting rod hole 20 and a bar sample hole 18 are opened on the cutter head bracket. The bar sample hole 18 is located between the movable cutter head 9 and the fixed cutter head 8, and the thin bar sample 7 passes through the bar sample hole 18. The connecting rod 10 passes through the connecting rod hole 20. The cutter head base 13 is close to the cam 14 and is located on the outside of the cam 14. The compression spring 12 and the movable cutter head 9 are respectively located on both sides of the connecting rod hole 20. A cutter head slot 19 is set on the cutter head bracket, and the fixed cutter head 8 is fixed to the cutter head bracket through the cutter head slot 19.

[0033] like Figure 3 As shown, a protective cover 24 is provided on the cutter head support, and the protective cover 24 is close to the bar sample hole 18. The protective cover 24 is a tetrahedron-like box design, including a bottom surface, a top surface, two side surfaces and a front end surface with a smaller area. The two side surfaces are perpendicular to the bottom surface, and the angle between the two side surfaces is smaller than the angle between the two cutting head surfaces opposite thereto. Figure 4-5 As shown, a rectangular opening 25 is provided on the front end surface, and the opening size of the rectangular opening 25 is sufficient to allow the sheared portion of the thin rod sample 7 to fall into the protective cover 24. The front end of the thin rod sample 7 extends into the protective cover 24 through the rectangular opening 25. A cylindrical collecting pool 26 is provided at the lowest point at the intersection of the bottom and top surfaces of the protective cover 24. The protective cover 24 is also provided with a bucket-shaped pouring spout 27, which is provided on one side of the collecting pool 26 to facilitate pouring out the sheared granular sample. When the protective cover 24 is placed horizontally along the cutting table of the base frame 1, there is still a small distance between the collecting pool and the base frame table.

[0034] The injection assembly includes a horizontally arranged cylindrical injection rod 5, such as Figure 6 As shown, a four-claw clamping seat 23 is provided at the front end of the injection rod 5. The four-claw clamping seat 23 includes four clamping fingers arranged along the length direction of the injection rod 5. The four clamping fingers are evenly distributed on the end face of the injection rod 5 in a circumferential manner. A locking ring 6 is sleeved on the outside of the four clamping fingers. The locking ring 6 is used to quickly achieve clamping and loosening when clamping a thin rod sample 7. The injection rod 5 and the four-claw clamping seat 23 are an integrated structure. A rod barrel 3 is sleeved at the rear of the injection rod 5. The rod barrel 3 is a cylindrical shell design. The inner diameter of the rod barrel 3 is the same as the radial size of the rear of the injection rod 5. The injection rod 5 is coaxially arranged with the rod barrel 3. The rear end of the injection rod 5 can move in the rod barrel 3, and the rear end of the injection rod 5 is completely in the rod barrel 3, as shown in FIG. Figure 7As shown, the upper and lower 1 / 5 parts of the middle part of the injection rod 5 are horizontally cut away, and the opening shape of the rod barrel 3 matches the shape of the middle part of the injection rod 5. When the middle part of the injection rod 5 slides outward along the opening of the rod barrel 3, the injection rod 5 and the rod barrel 3 can be prevented from being separated. The rod barrel 3 is fixed on the base frame 1, and a plurality of tooth grooves 22 are uniformly and equidistantly opened along its length direction at eight equally divided positions on the upper plane of the middle part of the injection rod 5. A wedge-shaped rotating shaft 2 is provided at a corresponding position in the middle part of the injection rod 5. The wedge-shaped part of the wedge-shaped rotating shaft 2 matches the tooth groove 22. The wedge-shaped rotating shaft 2 is connected to a low-power auxiliary motor 4. The rotation of the wedge-shaped rotating shaft 2 drives the injection rod 5 to move linearly along its length direction.

[0035] The wedge-shaped shaft 2 rotates one circle clockwise, and the sample injection rod 5 moves a distance between adjacent tooth grooves 22 outside the rod barrel 3. When the single thin bar sample 7 is cut, the wedge-shaped shaft 2 rotates counterclockwise. Each time it rotates one circle, the sample injection rod 5 moves a distance between adjacent tooth grooves 22 inside the rod barrel 3 until it returns to the initial position. The rotation control of the wedge-shaped shaft 2 can be actually set by the matched low-power auxiliary motor 4. When the sample injection rod 5 is in the initial position in the rod barrel 3, the four-claw clamping seat 23 at the front end of the sample injection rod 5 is a certain distance away from the sample injection rod hole 17, and the rear end of the sample injection rod 5 is in pressure-free contact with the rod barrel 3; at the same time, when the sample injection rod 5 is in the initial position, the tooth groove 22 closest to the front end of the sample injection rod 5 is just separated from the wedge-shaped shaft 2. When the injection rod 5 moves to the farthest distance relative to the rod barrel 3, the four-claw clamping seat 23 at the front end of the injection rod 5 is a certain distance away from the bar sample hole 18, and the tooth groove 22 of the injection rod 5 closest to its rear end is just separated from the wedge-shaped rotating shaft 2.

[0036] A sampling bracket is set on the base frame 1 at a position corresponding to the middle of the sampling rod 5, and a wedge-shaped shaft hole 16 and a sampling rod hole 17 are opened on the sampling bracket. The wedge-shaped shaft 2 is set on the sampling bracket through the wedge-shaped shaft hole 16, and the auxiliary motor 4 is fixed on the sampling bracket. The sampling rod 5 passes through the sampling rod hole 17, and the four-claw clamping seat 23 and the rod barrel 3 are respectively located on both sides of the sampling rod hole 17. The end of the thin rod sample 7 is fixed by the four-claw clamping seat 23, and a fixed plate is vertically set at a position corresponding to the end of the rod barrel 3 on the base frame 1. The front end of the rod barrel 3 is an opening, and the end of the rod barrel 3 is fixed on the fixed plate.

[0037] The use process of the electric sample cutting device for thin bar material of the present invention is specifically as follows:

[0038] 1) Sample preparation for analysis

[0039] The thin bar samples 7 to be analyzed in the laboratory on the same day are sorted and arranged in order, and records are kept. At the same time, small beakers equal in number to the samples are prepared and numbered.

[0040] 2) Motor parameter setting

[0041] The low-power auxiliary motor 4 is connected to the wedge-shaped rotating shaft 2, and the high-power main motor 15 is connected to the cam 14. Both motors are stepper motors that can realize parameter settings such as running time, rotation phase and direction.

[0042] The device completes the shearing operation of a thin bar sample 7, which can be divided into three sections according to time: the first section is mainly the time consumed for loading and unloading the thin bar sample 7; the middle section is the time consumed for the thin bar sample 7; and the last section is the time consumed for the wedge-shaped rotating shaft 2 and the sample injection rod 5 in the device to return to their initial state after the shearing is completed. Therefore, the main motor 15 and the auxiliary motor 4 should be set with corresponding parameters according to these three time sections. In addition, in order to simplify the parameter setting and switching frequency of the motor, the circuits of the main motor 15 and the auxiliary motor 4 can be connected in series, and one switch can be used to control the two motors at the same time.

[0043] Before turning on the power, first ensure that the movable cutter head 9 and the injection rod 5 are in their respective initial positions. At this time, the rear end of the injection rod 5 is in pressure-free contact with the rod barrel 3, but the wedge-shaped shaft 2 connected to the auxiliary motor 4 needs to be rotated counterclockwise to the three o'clock position (Note: the initial position of the wedge-shaped shaft 2 is not unique. As long as the wedge-shaped shaft 2 runs from the starting position, any position without operation conflict between the injection rod 5 and the movable cutter head 9 during the entire operation process can be selected. The present invention only describes the situation where the wedge-shaped shaft 2 starts to run from the three o'clock position), and the cam 14 connected to the main motor 15 does not change.

[0044] The front-end running parameters of the motor are set as follows: the speed of the main motor 15 is 0 m / s, and the duration is t1; the speed of the auxiliary motor 4 is 0 m / s, and the duration is t1. The duration t1 is set based on the actual time consumed by individual loading and unloading of the thin bar sample 7.

[0045] The mid-stage running parameters of the motor are set as follows: the rotation period of the cam 14 is the same as that of the wedge-shaped shaft 2, which is set to T, and the direction of rotation is set to clockwise. If the experiment requires shearing N particles of sample, the speed of the main motor 15 is v, and the duration is t2=NT; the speed of the auxiliary motor 4 is v, and the duration is t2=NT.

[0046] The final operation parameter setting of the motor: after completing the middle cutting operation, the movable cutter head 9 stops at its initial position, the wedge-shaped shaft 2 rotates to the three o'clock position, and then the wedge-shaped shaft 2 rotates counterclockwise at this position until the sample rod 5 returns to the initial position in the rod sleeve 3, and the wedge-shaped shaft 2 also stops at the three o'clock position. The speed of the main motor 15 is 0m / s, and the duration is t3=NT; the speed of the auxiliary motor 4 is v, and the duration is t3=NT. Therefore, the time taken to cut a thin bar sample 7 is: t=t1+t2+t3=t1+2NT.

[0047] 3) Electric cutting operation

[0048] A thin bar sample 7 is taken as an example for explanation.

[0049] First, ensure that the movable cutter head 9 and the sample injection rod 5 are in their respective initial positions, and rotate the wedge-shaped shaft 2 counterclockwise to the three o'clock position, then set the motor parameters, and then turn on the power. At the beginning, the motor is in the front-end operation cycle, that is, the stop state, during which the loading and unloading of the thin bar sample 7 are completed. Take out a thin bar sample 7 to be sheared in the order of numbers, insert one end of it into the bar sample hole 18, and quickly insert the other end into the four-claw clamping seat 23, clamp the lock ring 6, and then put the protective cover 24 on the cutting table of the base frame, and make the rectangular opening 25 on the front end of the protective cover 24 to put the sheared part of the thin bar sample 7 into the box.

[0050] After completing the above operation for a few seconds, the main motor 15 and the auxiliary motor 4 enter the middle operation cycle. Now, the effect of the device completing a cutting is described. Figure 8 As shown in the figure, after the last cutting of the same thin bar material sample 7 is completed, the movable cutter head 9 is moved to the initial position again, and the wedge-shaped shaft 2 is also rotated to the three o'clock position (Note: the sample feeding rod 5 is in the initial position in the rod sleeve 3 only when each thin bar material sample 7 is cut for the first time), such as position ①; because the two motors have the same direction and speed, when the wedge-shaped shaft 2 rotates clockwise to the tooth groove 22 above the sample feeding rod 5, the cam 14 also rotates clockwise by the same angle, but is in pressure-free contact with the cutter head base 13, such as position ②; when the wedge-shaped shaft 2 When the wedge-shaped shaft 2 rotates to the nine o'clock position, the maximum radial point of the cam 14 acts on the cutter head base 13, so that the movable cutter head 9 moves to the fixed cutter head 8 and completes the sample cutting operation, such as position ④; when the wedge-shaped shaft 2 and the cam 14 rotate 180°, they return to their respective initial positions, such as position ⑤. It can be seen that position ① to ④ is half a cycle, and ④ to ⑤ is half a cycle, among which the wedge-shaped shaft 2 interacts with the sample injection rod 5 only between positions ② and ③, and the sample cutting operation of the movable cutter head 9 is near position ④.

[0051] After the device completes the sample cutting operation, the main motor 15 and the auxiliary motor 4 enter the final operation cycle. The movable cutter head 9 stops at its initial position, the main motor 15 stops, the wedge-shaped shaft 2 rotates to the three o'clock position, and then the wedge-shaped shaft 2 rotates counterclockwise at this position until the injection rod 5 returns to the initial position in the rod sleeve 3, and the wedge-shaped shaft 2 also stops at the three o'clock position. When the motor enters the final operation cycle, the protective cover 24 can be removed, the protective cover 24 can be slightly tilted and the rectangular opening 25 can be facing upward, so that the granular sample in the protective cover 24 can slide into the collection pool 26, and then the granular sample can be poured into the small beaker with the corresponding serial number along the side of the bucket-shaped pouring mouth 27 of the protective cover 24. When the sampling rod 5 returns to its initial position in the rod sleeve 3, the wedge-shaped shaft 2 also stops at the three o'clock position, the auxiliary motor 4 stops, the locking ring 6 is loosened, the cut thin bar sample 7 is unloaded, and the next one is quickly loaded, and then the locking ring 6 is clamped again and the protective cover 24 is placed to carry out the next round of cutting operation until the cutting operation of all thin bar samples 7 is completed.

Claims

1. An electric shearing device for thin bar material, on which a thin bar material sample (7) is fixed for shearing, characterized in that: It comprises a base frame (1), on which a cutting assembly and a sample injection assembly are arranged; The cutting assembly comprises a cam (14) and a main motor (15); a connecting rod (10) is arranged outside the cam (14); a compression spring (12) is arranged on the connecting rod (10); the connecting rod (10) performs reciprocating motion during compression and resetting of the compression spring (12); a movable cutter head (9) is arranged at one end of the connecting rod (10); a fixed cutter head (8) is arranged fixedly relative to the movable cutter head (9); and a blade of the movable cutter head (9) is directly opposite to a blade of the fixed cutter head (8); The injection assembly comprises a horizontally arranged injection rod (5), a four-claw clamping seat (23) is arranged at the front end of the injection rod (5), a rod barrel (3) is sleeved at the rear of the injection rod (5), the injection rod (5) and the rod barrel (3) are coaxially arranged, the rear end of the injection rod (5) can move in the rod barrel (3), the rod barrel (3) is fixed on the base frame (1), a plurality of tooth grooves (22) are opened in the middle of the injection rod (5) along its length direction, the plurality of tooth grooves (22) are evenly and equidistantly arranged, a wedge-shaped rotating shaft (2) is arranged at a corresponding position in the middle of the injection rod (5), the wedge-shaped portion of the wedge-shaped rotating shaft (2) matches the tooth groove (22), the wedge-shaped rotating shaft (2) is connected to an auxiliary motor (4), and the rotation of the wedge-shaped rotating shaft (2) drives the injection rod (5) to move linearly along its length direction; The base frame (1) is provided with an injection bracket at a position corresponding to the middle of the injection rod (5); the injection bracket is provided with a wedge-shaped shaft hole (16) and an injection rod hole (17); the wedge-shaped shaft (2) is arranged on the injection bracket through the wedge-shaped shaft hole (16); the auxiliary motor (4) is fixed on the injection bracket; the injection rod (5) passes through the injection rod hole (17); the clamping seat (23) and the rod barrel (3) are respectively located on both sides of the injection rod hole (17); the end of the thin rod sample (7) is fixed by the clamping seat (23); a fixed plate is vertically provided at a position corresponding to the end of the rod barrel (3) on the base frame (1); the front end of the rod barrel (3) is open; and the end of the rod barrel (3) is fixed on the fixed plate.

2. The electric cutting device for thin bar material according to claim 1, characterized in that: Two vertically parallel support plates are arranged at positions corresponding to the cam (14) on the base frame (1), and cam shafts are arranged on the two support plates. Cam shaft holes (21) are correspondingly opened at positions of equal height on the two support plates. The cam shaft passes through the cam (14) and the cam shaft hole (21). The cam shaft is located on the axis of the cam (14) and is fixed to the cam (14). The cam shaft is connected to the main motor (15).

3. The electric cutting device for thin bar material according to claim 1, characterized in that: A cutter head bracket is arranged at a position corresponding to the cutter head on the base frame (1), and a connecting rod hole (20) and a bar sample hole (18) are provided on the cutter head bracket. The bar sample hole (18) is located between the movable cutter head (9) and the fixed cutter head (8). The thin bar sample (7) passes through the bar sample hole (18), and the connecting rod (10) passes through the connecting rod hole (20). A cutter head base (13) is fixed at one end of the connecting rod (10), and a movable cutter head (9) is fixed at the other end. The cutter head base (13) is close to the cam (14) and is located outside the cam (14). The compression spring (12) and the movable cutter head (9) are respectively located on both sides of the connecting rod hole (20). One end of the compression spring (12) is fixed to the cutter head base (13), and the other end is fixed to the cutter head bracket.

4. The electric cutting device for thin bar material according to claim 3, characterized in that: The cutter head bracket is provided with a cutter head slot (19), and the fixed cutter head (8) is fixed on the cutter head bracket via the cutter head slot (19).

5. The electric cutting device for thin bar material according to claim 3, characterized in that: A protective cover (24) is arranged on the cutter head support, and the protective cover (24) is close to the bar sample hole (18).

6. The electric cutting device for thin bar material according to claim 5, characterized in that: The protective cover (24) is provided with a rectangular opening (25), and the front end of the thin rod sample (7) extends into the protective cover (24) through the rectangular opening (25). A collecting pool (26) is provided at the lowest point of the protective cover (24). The protective cover (24) is also provided with a bucket-shaped pouring mouth (27), and the bucket-shaped pouring mouth (27) is provided on one side of the collecting pool (26).

7. The electric cutting device for thin bar material according to claim 1, characterized in that: The clamping seat (23) comprises four clamping fingers arranged along the length direction of the injection rod (5), the four clamping fingers are evenly distributed on the end surface of the injection rod (5) in a circumferential manner, and the four clamping fingers are externally sleeved with locking rings (6).

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