Side clearance adjustment mechanism and method for double eccentric sleeve disc shear

Abstract

The present invention belongs to the technical field of sheet metal production machinery, and specifically relates to a side clearance adjustment mechanism and method for a double eccentric sleeve disc shear. The present invention is organically combined by a housing, a side clearance support, a first linear guide, a nut seat, a nut seat side inclined pad, a second linear guide, a guide side inclined pad, a sleeve bearing seat, an eccentric sleeve, a plane bearing, an eccentric sleeve, a support bearing group, a cylindrical roller bearing, a cutter shaft, a first side plate, a third linear guide, a second side plate, a reduction motor, a self-resetting compression displacement sensor, a sensor plate, a ball screw and a control mechanism; the control mechanism at least includes a frequency converter and a PLC module, and the PLC module is connected to the reduction motor through the frequency converter; the PLC module is connected to the self-resetting compression displacement sensor through the frequency converter. The present invention has a compact structure, is suitable for double-tower disc shears with a small required turning radius, and is accurate and reliable in adjustment.

Description

Technical Field

[0001] The invention belongs to the technical field of sheet metal production machinery, and in particular relates to a side clearance adjustment mechanism and method for a double eccentric sleeve disc shear. Background Art

[0002] The twin-tower circular shear is an essential equipment for the plate processing production line, which is used to trim the strip to a certain length or remove the cracked edges caused by rolling. The twin-tower circular shear equipment has a total of four heads, with one spare head and one usable head on each side of the transmission side and the operation side. When working, only one head on each side of the operation side and the transmission side is in online working, and the spare head is in standby state. The online and spare heads on each side are on the same turntable, and the turntable rotates and positions when switching. Since there is a turntable on each side of the twin-tower circular shear equipment, the turning radius of the rotating outer contour of all equipment on its turntable must be avoided when designing and arranging the equipment. The main factor affecting the above-mentioned turning radius is the overall length of a single circular shear equipment on the turntable, so compressing the overall length of a single circular shear equipment has become one of the goals of designing such equipment.

[0003] Double eccentric sleeve disc shears have the advantages of good rigidity, compact structure, and the ability to grind the outer diameter of the blade, so they are widely used.

[0004] The side clearance adjustment mechanism of the double eccentric sleeve disc shear is located at the tail of the eccentric sleeve of the upper cutter shaft, and is usually arranged in a stacked and backward manner. The coupling and transmission motor of the upper cutter shaft are placed behind the side clearance adjustment mechanism in sequence. The above series of sequential arrangements will inevitably lengthen the length of the single disc shear head. This side clearance adjustment structure is no longer suitable for double eccentric sleeve double tower disc shears. Summary of the invention

[0005] The invention provides a side clearance adjustment mechanism and method for a double eccentric sleeve disc shear, aiming to provide a side clearance adjustment mechanism and method for a double eccentric sleeve disc shear which can meet the requirements of compact structure, small rotary radius of the turntable and reliable adjustment.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A side clearance adjustment mechanism for a double eccentric sleeve disc shear comprises a housing, a side clearance support, a first linear guide, a nut seat, a nut seat side oblique pad, a second linear guide, a guide side oblique pad, a sleeve bearing seat, an eccentric sleeve, a plane bearing, an eccentric sleeve, a support bearing group, a cylindrical roller bearing, a cutter shaft, a first side plate, a third linear guide, a second side plate, a reduction motor, a self-resetting compression displacement sensor, a sensing plate and a ball screw; the eccentric sleeve is rotatably connected in the housing, and the eccentric sleeve is connected axially A pressure plate is connected to prevent the eccentric sleeve from moving in the axial direction; the cutter shaft is connected to the eccentric sleeve; the front end of the eccentric sleeve is connected to a cylindrical roller bearing for supporting the head of the cutter shaft; the head of the eccentric sleeve is connected to the eccentric sleeve, and the eccentric sleeve is connected to a support bearing group for supporting the tail of the cutter shaft; the eccentric sleeve is an eccentric part, and the inner hole and the front end outer circle of the eccentric sleeve and the cylindrical roller bearing are all concentric with the cutter shaft; the tail of the eccentric sleeve is connected to the sleeve bearing seat and fixed by a plane bearing, and the tail outer circle of the eccentric sleeve is connected to the The outer circle on the sleeve bearing seat is concentric with the outer circle of the eccentric sleeve and rotates with the outer circle of the eccentric sleeve; the side gap support is fixedly connected to the top of the casing; the first side plate and the second side plate are respectively fixedly connected to the two sides of the casing, and the sleeve bearing seat is connected to the first side plate and the second side plate through two sets of third linear guides respectively connected to the two sides of the sleeve bearing seat; the side gap support and the nut seat are respectively fixedly connected to the upper surface of the casing, the reduction motor is fixedly connected to the side gap support, the output end of the reduction motor is connected to the ball screw, the nut of the ball screw is connected in the nut seat, one side of the nut seat is connected to the side gap support through the first linear guide, the opposite side of the nut seat and the first linear guide is connected to the sleeve bearing seat through the second linear guide, a nut seat side inclined pad is provided between the nut seat and the second linear guide, and a guide rail side inclined pad is provided between the nut seat and the sleeve bearing seat; the induction plate is fixedly connected to the end face of the second side plate, and the self-resetting compression displacement sensor is fixedly connected to the sleeve bearing seat and corresponds to the induction plate.

[0008] It also includes a control mechanism; the control mechanism at least includes a frequency converter and a PLC module, the PLC module is connected to the reduction motor by electrical signals through the frequency converter; the PLC module is connected to the self-resetting compression displacement sensor by electrical signals.

[0009] The support bearing group includes a cylindrical rolling bearing and a group of plane bearings; the eccentric sleeve can push the cutter shaft to move along the axis through the plane bearings.

[0010] The slope ratio of the inclined pad on the nut seat side and the inclined pad on the guide rail side is 1: (5-100).

[0011] A method for adjusting the side clearance adjustment mechanism of a double eccentric sleeve disc shear comprises the following steps:

[0012] Step 1: Measure the actual value of the side clearance of the disc shear, and input the actual value obtained into the control mechanism as the original calibration value;

[0013] Step 2: When the reduction motor starts to adjust, the side clearance adjustment mechanism measures the displacement difference during the adjustment process through the self-resetting compression displacement sensor and sends the displacement difference to the control mechanism;

[0014] Step 3: The control mechanism obtains the detection value of the side clearance according to the original calibration value obtained in step 1 and the displacement difference obtained in step 2, and the detection value = displacement difference + original calibration value, and then converts the number of rotations required by the reduction motor through the preset target value;

[0015] Step 4: When the difference between the detection value of the self-resetting compression displacement sensor and the preset target value of the disc shear side clearance is less than or equal to the allowable error value, proceed to step 5; otherwise, proceed to step 6;

[0016] Step 5: The control mechanism controls the reduction motor to stop rotating;

[0017] Step 6: The control mechanism sends a control command to the frequency converter, and the frequency converter adjusts the reduction motor;

[0018] Step 7: Repeat steps 2 to 4 until production stops.

[0019] In step 3, the number of rotations required by the reduction motor is calculated from the side clearance detection value and the preset target value using the following formula:

[0020] Number of rotations = (target value - detection value) * (i1×i2) / m

[0021] Where:

[0022] i2 is the slope ratio of the inclined pad;

[0023] i1 is the reduction ratio of the reduction motor;

[0024] m is the pitch of the ball screw.

[0025] The allowable error value in step 4 is 0.01 mm.

[0026] Beneficial effects:

[0027] The present invention greatly reduces the length of a single disc shear by utilizing the overlapping property of space arrangement through the adjustment design of the side clearance adjustment mechanism, has a compact structure, a small rotating radius of the turntable, and the adjustment mechanism has a selectable reduction ratio, which greatly improves the stability and accuracy of the adjustment mechanism.

[0028] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 is a cross-sectional view of the present invention;

[0031] Figure 2 is a side view of the present invention;

[0032] Figure 3 is a top view of the present invention;

[0033] Figure 4 It is a schematic diagram of the motion conversion relationship of the present invention.

[0034] In the figure: 1- housing; 2- side clearance support; 3- first linear guide; 4- nut seat; 5- nut seat side inclined pad; 6- second linear guide; 7- guide rail side inclined pad; 8- loose sleeve bearing seat; 9- eccentric loose sleeve; 10- plane bearing; 11- eccentric sleeve; 12- support bearing group; 13- cylindrical roller bearing; 14- knife shaft; 15- first side plate; 16- third linear guide; 17- second side plate; 18- reduction motor; 19- self-resetting compression displacement sensor; 20- induction plate; 21- ball screw. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1:

[0037] Reference Figure 1-Figure 3The side clearance adjustment mechanism for a double eccentric sleeve disc shear shown in the figure comprises a housing 1, a side clearance support 2, a first linear guide 3, a nut seat 4, a nut seat side inclined pad 5, a second linear guide 6, a guide side inclined pad 7, a sleeve bearing seat 8, an eccentric sleeve 9, a plane bearing 10, an eccentric sleeve 11, a support bearing group 12, a cylindrical roller bearing 13, a knife shaft 14, a first side plate 15, a third linear guide 16, a second side plate 17, a reduction motor 18, a self-resetting compression displacement sensor 19, a sensing plate 20 and a ball screw 21; the eccentric sleeve 11 is rotatably connected in the housing 1, and ... The core sleeve 11 is axially connected with a pressure plate for preventing the eccentric sleeve 11 from moving axially; the knife shaft 14 is connected in the eccentric sleeve 11; the front end of the eccentric sleeve 11 is connected with a cylindrical roller bearing 13 for supporting the head of the knife shaft 14; the head of the eccentric sleeve 9 is connected in the eccentric sleeve 11, and the eccentric sleeve 9 is connected with a support bearing group 12 for supporting the tail of the knife shaft 14; the eccentric sleeve 9 is an eccentric part, and the inner hole and the front end outer circle of the eccentric sleeve 9 and the cylindrical roller bearing 13 are all concentric with the knife shaft 14; the tail of the eccentric sleeve 11 is connected in the sleeve bearing seat 8 and is fixed by a plane bearing 10, and the eccentric sleeve 9 is connected to the eccentric sleeve 9. The outer circle of the tail of the sleeve 11 is concentric with the outer circle on the sleeve bearing seat 8 and the outer circle of the eccentric sleeve 11, and rotates together with the outer circle of the eccentric sleeve 11; the side gap support 2 is fixedly connected to the top of the casing 1; the first side plate 15 and the second side plate 17 are respectively fixedly connected to the two sides of the casing 1, and the sleeve bearing seat 8 is connected to the first side plate 15 and the second side plate 17 through two sets of third linear guides 16 respectively connected to the two sides of the sleeve bearing seat 8; the side gap support 2 and the nut seat 4 are respectively fixedly connected to the upper surface of the casing 1, and the reduction motor 18 is fixedly connected to the side gap support 2. The output end is connected to the ball screw 21, the nut of the ball screw 21 is connected to the nut seat 4, one side of the nut seat 4 is connected to the side gap support 2 through the first linear guide 3, the nut seat 4 and the opposite side of the first linear guide 3 are connected to the sleeve bearing seat 8 through the second linear guide 6, a nut seat side inclined pad 5 is arranged between the nut seat 4 and the second linear guide 6, and a guide rail side inclined pad 7 is arranged between the nut seat 4 and the sleeve bearing seat 8; the sensing plate 20 is fixedly connected to the end face of the second side plate 17, and the self-resetting compression displacement sensor 19 is fixedly connected to the sleeve bearing seat 8 and corresponds to the sensing plate 20.

[0038] In actual use, first measure the side clearance of the disc shear as the original calibration value; then, start the reduction motor 18 to drive the ball screw 21 to rotate, so that the nut seat 4 is driven to make linear motion through the nut of the ball screw 21 installed in the nut seat 4, and then the linear motion of the nut seat 4 is converted into the linear motion of the sleeve bearing seat 8 along the axial direction of the cutter shaft 14 through the side inclined pad of the nut seat 5 between the nut seat 4 and the second linear guide 6, and the side inclined pad of the guide 7 between the nut seat 4 and the sleeve bearing seat 8. The self-resetting compression displacement sensor 19 fixed on the sleeve bearing seat 8 is displaced together with the sleeve bearing seat 8. The self-resetting compression displacement sensor 19 can measure the displacement difference during the adjustment process. According to the preset target value, it is judged that the difference between the detection value of the reset compression displacement sensor 19 and the preset target value of the side clearance of the disc shear is less than or equal to the allowable error value, and the reduction motor 18 stops rotating. Otherwise, according to the following formula

[0039] Displacement difference + calibration value = detection value

[0040] Number of rotations = (target value - detection value) * (i1×i2) / m

[0041] Where:

[0042] i2 is the slope ratio of the inclined pad;

[0043] i1 is the reduction ratio of the reduction motor;

[0044] m is the pitch of the ball screw;

[0045] By calculating the number of rotations required by the reduction motor 18 and then starting and adjusting the reduction motor 18, the speed of the motor when adjusting the side clearance can be controlled, thereby achieving the accuracy of accurately controlling the side clearance.

[0046] The outer circle of the head of the eccentric sleeve 9 is concentric with the eccentric sleeve 9, and the outer circle of the tail of the eccentric sleeve 9 is concentric with the inner hole of the bearing seat 8, so that the rotation of the eccentric sleeve 11 does not interfere with the rotation of the cutter shaft 14. A support bearing group 12 is provided inside the eccentric sleeve 9 to realize that the sleeve 9 and the cutter shaft 14 are fixedly connected and can move axially at the same time. The tail of the eccentric sleeve 9 is fixedly connected with the bearing seat 8 through a plane bearing 10, so that the sleeve 9 and the bearing seat 8 are fixedly connected and can move axially at the same time.

[0047] In actual use, the eccentric sleeve 11 needs to rotate to adjust the overlap amount of the double eccentric disc shears, and the existence of the loose sleeve 9 can achieve the rotation of the eccentric sleeve 11 and the rotation of the cutter shaft 14 without interference.

[0048] The present invention designs the technical solution based on the principle that the smaller the rotation radius of the double eccentric sleeve double tower disc shear, the more advantageous it is. The present invention utilizes the overlap of the spatial arrangement to greatly reduce the length of a single disc shear, and the adjustment mechanism has a selectable reduction ratio, which greatly improves the stability and accuracy of the adjustment mechanism.

[0049] Embodiment 2:

[0050] Reference Figure 1 and Figure 3 The side clearance adjustment mechanism for a double eccentric sleeve disc shear shown in the figure is different from the first embodiment in that it also includes a control mechanism; the control mechanism at least includes a frequency converter and a PLC module, the PLC module is electrically connected to the reduction motor 18 through the frequency converter; the PLC module is electrically connected to the self-resetting compression displacement sensor 19.

[0051] In actual use, the PLC module performs relevant operations on the numerical values ​​transmitted by the self-resetting compression displacement sensor 19 to obtain the speed value of the reduction motor 18, and controls the reduction motor 18 through the frequency converter, thereby controlling the adjustment accuracy of the entire disc shear body device.

[0052] The setting of the control mechanism makes the acquisition and transmission of the data of the self-resetting compression displacement sensor 19 and the control of the reduction motor 18 not only automated but also more accurate and timely.

[0053] The PLC module and the frequency converter in this embodiment both adopt the existing technology.

[0054] In specific applications, it is sufficient as long as the frequency converter is matched with the reduction motor 18 .

[0055] Embodiment three:

[0056] Reference Figure 1 The side clearance adjustment mechanism for a double eccentric sleeve disc shear shown in the figure is different from that of the first embodiment in that the support bearing group 12 includes a cylindrical rolling bearing and a group of plane bearings; the eccentric sleeve 9 can push the cutter shaft 14 to move along the axis through the plane bearing.

[0057] In actual use, the support bearing group 12 adopts this technical solution, so that the support bearing group 12 can not only support the knife shaft 14, but also be axially hard connected with the knife shaft 14, and ensure simultaneous axial movement with the knife shaft 14.

[0058] Embodiment 4:

[0059] Reference Figure 1 and Figure 4The side clearance adjustment mechanism for a double eccentric sleeve disc shear shown in the figure is different from that of the first embodiment in that the slope ratio of the nut seat side inclined pad 5 and the guide rail side inclined pad 7 is 1:(5-100).

[0060] In actual use, the nut seat side inclined pad 5 and the guide rail side inclined pad 7 adopt this technical solution to ensure that the knife shaft 14 produces axial movement, and the large value ratio has structural self-locking to ensure that there will be no passive movement after the adjustment is completed.

[0061] Embodiment five:

[0062] A method for adjusting the side clearance adjustment mechanism of a double eccentric sleeve disc shear comprises the following steps:

[0063] Step 1: Measure the actual value of the side clearance of the disc shear, and input the actual value obtained into the control mechanism as the original calibration value;

[0064] Step 2: When the reduction motor 18 starts to adjust, the side clearance adjustment mechanism measures the displacement difference during the adjustment process through the self-resetting compression displacement sensor 19, and sends the displacement difference to the control mechanism;

[0065] Step 3: The control mechanism obtains the detection value of the side clearance according to the original calibration value obtained in step 1 and the displacement difference obtained in step 2, where the detection value = displacement difference + original calibration value, and then converts the number of rotations required by the reduction motor 18 through the preset target value;

[0066] Step 4: When the difference between the detection value of the self-resetting compression displacement sensor 19 and the preset target value of the disc shear side clearance is less than or equal to the allowable error value, proceed to step 5; otherwise, proceed to step 6;

[0067] Step 5: The control mechanism controls the reduction motor 18 to stop rotating;

[0068] Step 6: The control mechanism sends a control instruction to the frequency converter, and the frequency converter adjusts the reduction motor 18;

[0069] Step 7: Repeat steps 2 to 4 until production stops.

[0070] The control mechanism of the present invention compares the target value of the side clearance, the absolute value of the calibration value of the side clearance difference measured by the displacement sensor and the advance amount of the motor starting deceleration, and performs closed-loop control of the side clearance adjustment.

[0071] Embodiment six:

[0072] A method for adjusting the side clearance adjustment mechanism of a double eccentric sleeve disc shear is different from the fifth embodiment in that: in the step 3, the number of rotations required by the reduction motor 18 is calculated from the side clearance detection value and the preset target value by using the following formula:

[0073] Number of rotations = (target value - detection value) * (i1×i2) / m

[0074] Where:

[0075] i2 is the slope ratio of the inclined pad;

[0076] i1 is the reduction ratio of the reduction motor;

[0077] m is the pitch of the ball screw.

[0078] Preferably, the allowable error value in step 4 is 0.01 mm.

[0079] By adopting this technical solution, the measured original calibration value and side clearance detection value are combined with the preset target value to accurately convert the number of rotations of the reduction motor 18 into the reduction motor 18, so as to adjust the reduction motor 18 and ultimately achieve the purpose of accurately adjusting the side clearance of the double eccentric sleeve disc shear.

[0080] Embodiment seven:

[0081] A method for adjusting the side clearance adjustment mechanism of a double eccentric sleeve disc shear

[0082] According to the relationship of 1:1 between the tool axis displacement and the side clearance, the following steps are included:

[0083] 1) The change in the side clearance of the shearing device is always linearly proportional to the displacement of the upper cutter shaft, and the specific device proportional value is unique, which is 1 here.

[0084] 2) Side clearance actual value control

[0085] Actual value of side clearance dip 实 = Upper tool axis displacement P*1 (Formula 1)

[0086] 3) Calculate the side clearance dip according to formula (1) 实 , set the corresponding tool axis movement value P;

[0087] 4) The P value is detected by using a self-resetting compression displacement sensor 19;

[0088] 5) A control system consisting of a reduction motor 18, a self-resetting compression displacement sensor 19, a motor adjustment device, and a PLC automatically controls and adjusts the axial displacement P of the knife shaft, thereby controlling the side clearance of the blade.

[0089] 6) If the slope ratio of the inclined pad is i2, the reduction ratio of the reduction motor 18 is i1, and the pitch of the ball screw 21 is m, the side clearance displacement generated by one rotation of the motor is L:

[0090] L=m / (i1×i2)

[0091] The number of revolutions required by the reduction motor 18 = (target value - detection value) * (i1 × i2) / m

[0092] By adjusting the reduction motor 18, the speed of the motor when adjusting the side clearance can be controlled, so as to achieve the accuracy of accurately controlling the side clearance.

[0093] Selecting a suitable reduction ratio and increasing the change in side clearance produced by a single-turn rotation of the motor can effectively improve control accuracy and adjustment stability.

[0094] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0095] In the absence of conflicts, technicians in this field can combine the relevant technical features in the above examples according to actual conditions to achieve corresponding technical effects. The specific combinations are not described here one by one.

[0096] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0097] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0098] The above are only preferred embodiments of the present invention. The present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A side clearance adjustment mechanism for a double eccentric sleeve disc shear, characterized in that: The invention comprises a housing (1), a side clearance support (2), a first linear guide (3), a nut seat (4), a nut seat side inclined pad (5), a second linear guide (6), a guide rail side inclined pad (7), a loose sleeve bearing seat (8), an eccentric loose sleeve (9), a plane bearing (10), an eccentric sleeve (11), a support bearing group (12), a cylindrical roller bearing (13), a knife shaft (14), a first side plate (15), a third linear guide (16), a second side plate (17), a reduction motor (18), a self-resetting compression displacement sensor (19), a sensing plate (20) and a ball screw (21); the eccentric sleeve (11) is rotatably connected in the housing (1), and the eccentric sleeve (11) is axially connected to the housing (1). A pressure plate for preventing the eccentric sleeve (11) from moving in the axial direction; the knife shaft (14) is connected to the eccentric sleeve (11); the front end of the eccentric sleeve (11) is connected to a cylindrical roller bearing (13) for supporting the head of the knife shaft (14); the head of the eccentric sleeve (9) is connected to the eccentric sleeve (11), and the eccentric sleeve (9) is connected to a support bearing group (12) for supporting the tail of the knife shaft (14); the eccentric sleeve (9) is an eccentric part, and the inner hole and the front end outer circle of the eccentric sleeve (9) and the cylindrical roller bearing (13) are all concentric with the knife shaft (14); the tail of the eccentric sleeve (11) is connected to the sleeve bearing seat (8) and is fixed by a plane bearing (10), and the tail outer circle of the eccentric sleeve (11) is The outer circle of the sleeve bearing seat (8) is concentric with the outer circle of the eccentric sleeve (11), and rotates together with the outer circle of the eccentric sleeve (11); the side clearance support (2) is fixedly connected to the top of the casing (1); the first side plate (15) and the second side plate (17) are respectively fixedly connected to the two sides of the casing (1); the sleeve bearing seat (8) is connected to the first side plate (15) and the second side plate (17) through two sets of third linear guides (16) respectively connected to the two sides of the sleeve bearing seat (8); the side clearance support (2) and the nut seat (4) are respectively fixedly connected to the upper surface of the casing (1); the reduction motor (18) is fixedly connected to the side clearance support (2), and the output end of the reduction motor (18) is connected to the ball bearing. The ball screw (21) is connected to the nut seat (4), the nut of the ball screw (21) is connected to the nut seat (4), one side of the nut seat (4) is connected to the side gap support (2) through the first linear guide rail (3), the nut seat (4) and the side opposite to the first linear guide rail (3) are connected to the sleeve bearing seat (8) through the second linear guide rail (6), a nut seat side inclined pad (5) is provided between the nut seat (4) and the second linear guide rail (6), and a guide rail side inclined pad (7) is provided between the nut seat (4) and the sleeve bearing seat (8); the sensing plate (20) is fixedly connected to the end surface of the second side plate (17), and the self-resetting compression displacement sensor (19) is fixedly connected to the sleeve bearing seat (8) and corresponds to the sensing plate (20); The support bearing group (12) includes a cylindrical rolling bearing and a group of plane bearings; the eccentric sleeve (9) can push the knife shaft (14) to move along the axis through the plane bearings; The inclination ratio of the nut seat side inclined pad (5) and the guide rail side inclined pad (7) is 1: (5-100).

2. A side clearance adjustment mechanism for a double eccentric sleeve disc shear according to claim 1, characterized in that: It also includes a control mechanism; the control mechanism at least includes a frequency converter and a PLC module, the PLC module is electrically connected to the reduction motor (18) via the frequency converter; the PLC module is electrically connected to the self-resetting compression displacement sensor (19).

3. The method for adjusting the side clearance adjustment mechanism of a double eccentric sleeve disc shear according to claim 2, characterized in that: The following steps are included Step 1: Measure the actual value of the side clearance of the disc shear, and input the actual value obtained into the control mechanism as the original calibration value; Step 2: When the reduction motor (18) starts adjustment, the side clearance adjustment mechanism measures the displacement difference during the adjustment process through the self-resetting compression displacement sensor (19), and sends the displacement difference to the control mechanism; Step 3: The control mechanism obtains a detection value of the side clearance according to the original calibration value obtained in step 1 and the displacement difference obtained in step 2, where the detection value = displacement difference + original calibration value, and then converts the number of rotations required by the reduction motor (18) according to a preset target value; Step 4: When the difference between the detection value of the self-resetting compression displacement sensor (19) and the preset target value of the disc shear side clearance is less than or equal to the allowable error value, proceed to step 5; otherwise, proceed to step 6; Step 5: The control mechanism controls the reduction motor (18) to stop rotating; Step 6: The control mechanism sends a control command to the frequency converter, and the frequency converter adjusts the reduction motor (18); Step 7: Repeat steps 2 to 4 until production stops.

4. The method for adjusting the side clearance adjustment mechanism of a double eccentric sleeve disc shear according to claim 3, characterized in that: In the step 3, the number of rotations required by the reduction motor (18) is calculated from the side clearance detection value and the preset target value using the following formula: Number of rotations = (target value - detection value) * / m Where: i2 is the slope ratio of the inclined pad; i1 is the reduction ratio of the reduction motor; m is the pitch of the ball screw.

5. The method for adjusting the side clearance adjustment mechanism of a double eccentric sleeve disc shear according to claim 3, characterized in that: The allowable error value in step 4 is 0.01 mm.

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