A clamping tooling for straightness inspection in the machining of metal rods

Abstract

The present invention belongs to the technical field of straightness detection devices, and specifically relates to a clamping tooling for straightness inspection of metal rod machining, including a base. A groove is formed in the top of the base, and two movable blocks are slidably installed in the groove. A movable plate is fixedly connected to the top of the movable block, and the same screw rod is threadedly penetrated and connected between the two movable blocks. By providing an adjustment component in the present invention, during detection, first clamp the workpiece between two clamping discs, and then rotate the two clamping discs so that the dial rods on the two clamping discs push the two arc-shaped guide plates to move different distances. As the arc-shaped guide plates move, the guide rod can deflect in the horizontal direction and finally be parallel to the surface of the conical workpiece. Furthermore, when the lever micrometer used for measurement is installed on the guide rod, the lever micrometer can slide parallel to the surface of the conical workpiece under the limitation of the guide rod, thereby completing the straightness detection operation of the surface of the conical workpiece.

Description

Technical Field

[0001] The present invention belongs to the technical field of straightness detection devices for metal rods, and particularly relates to a clamping tooling for straightness inspection in the machining of metal rods. Background Art

[0002] Straightness indicates the state in which the straight elements on a part maintain an ideal straight line, that is, the so-called flatness. Straightness tolerance is the maximum allowable variation of the actual line with respect to the ideal straight line. Straightness refers to the state where the elements of the surface or the derived median line are straight. When straightness controls the surface elements, the straightness of the linear elements means that each linear element (axis or center plane) is in a straight state. Straightness control directly for the surface is a form and position tolerance that limits the allowable value of the linear element error of the surface.

[0003] Straightness is an important factor in measuring the quality of workpieces during workpiece production. The existing measurement of the straightness of workpieces generally requires first fixing the workpiece on a clamping device, then installing a lever dial indicator on the fixed guide rail of the clamping device, and then moving the lever dial indicator to make it move along the surface of the workpiece, so as to complete the measurement of the straightness of the workpiece surface. However, the existing clamping devices generally clamp cylindrical or regular long-strip workpieces, and the guide rails of the clamping devices are also immovable, resulting in that when detecting the straightness of a workpiece with a tapered side, the guide rails on the existing clamping devices cannot well cooperate with the lever dial indicator to move along the surface of the tapered workpiece, and thus it is inconvenient to measure the straightness of the tapered workpiece.

[0004] Therefore, it is very necessary to invent a clamping tooling for straightness inspection in the machining of metal rods to solve the above problems. Summary of the Invention

[0005] In view of the above problems, the present invention provides a clamping tooling for straightness inspection in the machining of metal rods to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A clamping tooling for straightness inspection in the machining of metal rods, including a base, a groove is opened at the top of the base, two movable blocks are slidably installed in the groove, a movable plate is fixedly connected to the top of the movable block, the same screw rod is threadedly penetrated and connected between the two movable blocks, and the threads of the relative parts of the screw rod and the two movable blocks are designed in the opposite direction. One end of the screw rod is rotatably penetrated and inserted on one side of the base, and a motor is connected to this end of the screw rod. The other end of the screw rod is vertically rotatably connected to the groove wall. A clamping assembly is installed on the top of the movable plate, and an adjusting assembly is provided on the front side of the two clamping assemblies.

[0007] Further, the clamping assembly includes a clamping disc. A workpiece to be clamped is provided between the two clamping discs. At the centers of the sides of the two clamping discs away from each other, fixed columns are vertically and fixedly connected. A support column is rotatably sleeved on the fixed column. The support column is fixedly connected to the top of the movable plate. One end of the fixed column away from the fixed column is connected to a crank. On the side of the clamping disc away from the fixed column, a plurality of movable grooves are provided, and the plurality of movable grooves are annularly distributed. One side of the movable groove away from the center of the clamping disc communicates with the side surface of the clamping disc. An electric slider is slidably installed in the movable groove. One side of the electric slider away from the fixed column is fixedly connected to an arc-shaped clamping plate, and the arc-shaped clamping plate is located on the side of the electric slider close to the center of the clamping disc. One end of the electric slider away from the center of the clamping disc is vertically and fixedly connected to a dial rod.

[0008] Further, the adjusting assembly includes two columns. The two columns are respectively vertically located on the tops of the two movable plates. At the corresponding positions at the bottoms of the columns, chutes are provided on the tops of the movable plates. The chutes are parallel to the side surface of the base, and the bottoms of the columns are slidably installed in the chutes. On the sides of the two columns away from each other, positioning plates are vertically and fixedly connected, and the positioning plates are close to the tops of the movable plates. A positioning pin is threadedly inserted through the top of the positioning plate. At the bottom of the positioning pin, a positioning groove parallel and equal in length to the chute is provided on the top of the movable plate. The bottom of the positioning pin is inserted into the positioning groove. The top of the column is fixedly connected to a fixed ring, and the center of the fixed ring is at the same height as the center of the clamping disc. At the rear of the fixed ring, an arc-shaped guide plate is fixedly connected. The arc-shaped guide plate protrudes towards the direction close to the clamping disc, and the arc-shaped guide plate and the dial rod are in the same plane. An activity ball is rotatably installed inside the fixed ring. A guide rod is slidably inserted through between the two activity balls. The two ends of the guide rod are slidably inserted with activity rods. At the free ends of the two activity rods, U-shaped plates are provided. The openings of the two U-shaped plates face each other, and the free ends of the two activity rods are respectively located inside the openings of the two U-shaped plates. On the inner top and inner bottom of the U-shaped plate, guide rails are symmetrically provided. The guide rails are parallel to the side surface of the base. Between the two guide rails, there is the same fixed shaft, and the top and bottom ends of the fixed shaft are respectively slidably installed in the two guide rails. The fixed shaft is vertically inserted through the free end of the activity rod. On the sides of the two U-shaped plates away from each other, connecting plates are fixedly connected. The bottom of the connecting plate is fixedly connected to the top of the base.

[0009] Further, the fixed column is of a hollow design. A jack is penetrated and provided at the center of the clamping disc, and the jack communicates with the inside of the fixed column. A magnetic circular plate is detachably installed at the opening of the jack, and the side of the circular plate close to the workpiece is flush with the side of the clamping disc close to the workpiece.

[0010] Further, the front side of the upright column is fixedly connected to an L-shaped rod, and the vertical section of the L-shaped rod faces upward. A receiving groove is formed on the front side of the base. A straight plate is placed in the receiving groove. The length of the straight plate is greater than the maximum distance between the two L-shaped rods, and the thickness of the straight plate is equal to the distance between the inner side of the L-shaped rod and the upright column.

[0011] Further, a rubber strip is fixedly connected to the bottom wall of the positioning groove, and the size of the rubber strip matches the size of the positioning groove.

[0012] Further, a strip-shaped handle is fixedly connected to the front side of the straight plate, and the strip-shaped handle is located outside the receiving groove.

[0013] Further, the circular plate is in the shape of a convex platform, and a notch is formed at the intersection of the socket and the edge of the circular plate.

[0014] Further, the free end of the dial rod is always located outside the movable groove, and the free end of the dial rod is designed as an arc.

[0015] The technical effects and advantages of the present invention:

[0016] 1. In the present invention, by providing an adjustment assembly, when detecting the straightness of a conical workpiece, first clamp the workpiece between two clamping disks, and then rotate the two clamping disks to drive the corresponding dial rods to contact the corresponding arc-shaped guide plates. Thus, the dial rods on the two clamping disks push the two arc-shaped guide plates to move different distances. As the arc-shaped guide plates move, the guide rod can deflect in the horizontal direction and finally be parallel to the surface of the conical workpiece. Furthermore, when the lever micrometer for measurement is installed on the guide rod, the lever micrometer can slide parallel to the surface of the conical workpiece under the restriction of the guide rod, thereby completing the straightness detection operation of the surface of the conical workpiece.

[0017] 2. In the present invention, by providing a jack, when clamping a workpiece with flat ends, the circular plate can block the opening of the jack, thereby meeting the clamping requirements for this type of workpiece. When clamping some conical workpieces with pointed ends, the circular plate adsorbed at the jack can be dug out through the notch position, and then the pointed end of the workpiece can be inserted into the jack, thereby increasing the clamping stability of this type of workpiece while preventing the pointed end of the workpiece from being damaged by the clamping disk.

[0018] 3. In the present invention, by providing an L-shaped rod on the front side of the upright column, when it is necessary to detect the straightness of a regular cylinder or a long-strip workpiece, take out the straight plate from the receiving groove by pinching the strip-shaped handle, and then insert the straight plate into the position between the two L-shaped rods and the upright column, so that the two upright columns can be in the same plane under the restriction of the straight plate. Furthermore, when adjusting the position of the upright column through the dial rod, the two upright columns can maintain the same movement state, which is more conducive to keeping the guide rod parallel to the workpiece and ensuring the accuracy during measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a first three-dimensional schematic diagram of the movable plate and a part of the clamping assembly in the present invention;

[0021] Figure 3 is a second three-dimensional schematic diagram of the movable plate and a part of the clamping assembly in the present invention;

[0022] Figure 4 is a three-dimensional schematic diagram of the straight plate and a part of the adjusting assembly in the present invention;

[0023] Figure 5 is a three-dimensional schematic diagram of the connecting plate, U-shaped plate and guide rail in the present invention.

[0024] In the figure: 1, base; 2, movable block; 3, movable plate; 4, screw; 5, motor; 6, clamping assembly; 61, clamping disc; 62, workpiece; 63, fixed column; 64, support column; 65, crank; 66, electric slider; 67, arc-shaped clamping plate; 68, lever; 7, adjusting assembly; 701, column; 702, positioning plate; 703, positioning pin; 704, fixed ring; 705, arc-shaped guide plate; 706, movable ball; 707, guide rod; 708, movable rod; 709, U-shaped plate; 710, guide rail; 711, fixed shaft; 712, connecting plate; 8, jack; 9, round plate; 10, L-shaped rod; 11, straight plate; 12, rubber strip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0026] The present invention provides a straightness inspection clamping tool for metal rod machining as shown in Figures 1 to 5 , including a base 1. A groove is formed at the top of the base 1. Two movable blocks 2 are slidably installed in the groove. A movable plate 3 is fixedly connected to the top of the movable block 2. The same screw 4 is threadedly penetrated and connected between the two movable blocks 2, and the threads of the relative parts of the screw 4 and the two movable blocks 2 are designed to be opposite. One end of the screw 4 rotatably penetrates and is inserted into one side of the base 1, and the end of the screw 4 is connected with a motor 5. The other end of the screw 4 is vertically rotatably connected to the groove wall of the groove. A clamping assembly 6 is installed on the top of the movable plate 3. A same adjusting assembly 7 is arranged on the front sides of the two clamping assemblies 6;

[0027] Before the straightness of the conical workpiece 62 is detected, the workpiece 62 is horizontally placed between the two clamping assemblies 6. Then, the motor 5 is started, so that the clamping assemblies 6 on the two movable plates 3 can move in opposite directions under the action of the screw 4 on the movable block 2. When the two clamping assemblies 6 are respectively pressed against the two ends of the workpiece 62, the clamping assemblies 6 are started to center and further clamp the workpiece 62;

[0028] When the workpiece 62 is centered and clamped, the workpiece 62 is rotated through the clamping assembly 6. During the rotation of the workpiece 62, the adjusting assembly 7 can be automatically adjusted so that it is parallel to the surface of the conical workpiece 62. Subsequently, the lever dial indicator for measuring straightness is installed on the adjusting assembly 7. During measurement, the lever dial indicator is moved along the direction of the adjusting assembly 7 to complete the straightness detection operation of the surface of the conical workpiece 62.

[0029] As Figures 1 to 3 shown, the clamping assembly 6 includes a clamping disc 61. The workpiece 62 to be clamped is arranged between the two clamping discs 61. Fixed columns 63 are vertically and fixedly connected to the centers of the sides of the two clamping discs 61 away from each other. A support column 64 is rotatably sleeved on the fixed column 63. The support column 64 is fixedly connected to the top of the movable plate 3. A handle 65 is connected to one end of the fixed column 63 away from the fixed column 63. A plurality of movable grooves are formed on the side of the clamping disc 61 away from the fixed column 63, and the plurality of movable grooves are annularly distributed. The side of the movable groove away from the center of the clamping disc 61 communicates with the side surface of the clamping disc 61. An electric slider 66 is slidably installed in the movable groove. A curved clamping plate 67 is fixedly connected to the side of the electric slider 66 away from the fixed column 63, and the curved clamping plate 67 is located on the side of the electric slider 66 close to the center of the clamping disc 61. A dial rod 68 is vertically and fixedly connected to one end of the electric slider 66 away from the center of the clamping disc 61. The free end of the dial rod 68 is always outside the movable groove, and the free end of the dial rod 68 is designed as an arc;

[0030] Before the straightness of the conical workpiece 62 is detected, the workpiece 62 is horizontally placed between the two clamping discs 61. Then, the motor 5 is started. With the start of the motor 5, the screw 4 can drive the two movable plates 3 to move in opposite directions through the two movable blocks 2 under the action of the motor 5. With the movement of the movable plates 3, the two clamping discs 61 can simultaneously approach the two ends of the workpiece 62. When the two clamping discs 61 are respectively pressed against the two ends of the workpiece 62, the electric sliders 66 on the two clamping discs 61 are respectively started, so that the plurality of curved clamping plates 67 can simultaneously approach the surface of the workpiece 62 under the drive of the plurality of electric sliders 66, thereby centering and further clamping the workpiece 62;

[0031] After the workpiece 62 is clamped, the fixed column 63 and the clamping disc 61 can be driven to rotate by the crank 65. As the clamping disc 61 rotates, the lever 68 on the clamping disc 61 can contact the adjusting assembly 7, thereby adjusting the adjusting assembly 7 so that it can be parallel to the surface of the tapered workpiece 62. Furthermore, when the lever dial indicator for measurement is installed on the adjusting assembly 7, the lever dial indicator can move along a direction parallel to the surface of the workpiece 62, thereby completing the straightness detection operation of the tapered workpiece 62.

[0032] As Figure 1 , Figure 4 and Figure 5 shown, the adjusting assembly 7 includes two columns 701. The two columns 701 are respectively vertically located at the tops of the two movable plates 3. At the corresponding positions at the bottoms of the columns 701, chutes are opened on the tops of the movable plates 3. The chutes are parallel to the side surface of the base 1, and the bottoms of the columns 701 are slidably installed in the chutes. On the separated sides of the two columns 701, positioning plates 702 are vertically and fixedly connected. The positioning plates 702 are close to the tops of the movable plates 3. A positioning pin 703 is threadedly inserted through the top of the positioning plate 702. At the top of the movable plate 3 corresponding to the bottom of the positioning pin 703, a positioning groove parallel and equal in length to the chute is opened. The bottom of the positioning pin 703 is inserted into the positioning groove. The top of the column 701 is fixedly connected with a fixed ring 704, and the center of the fixed ring 704 and the center of the clamping disc 61 are at the same height. The rear side of the fixed ring 704 is fixedly connected with an arc-shaped guide plate 705. The arc-shaped guide plate 705 protrudes towards the clamping disc 61, and the arc-shaped guide plate 705 and the lever 68 are in the same plane. An activity ball 706 is rotatably installed inside the fixed ring 704. A guide rod 707 is slidably inserted through between the two activity balls 706. Both ends of the guide rod 707 are slidably inserted with activity rods 708. The free ends of the two activity rods 708 are respectively provided with U-shaped plates 709. The openings of the two U-shaped plates 709 face each other, and the free ends of the two activity rods 708 are respectively located inside the openings of the two U-shaped plates 709. On the inner top and inner bottom of the U-shaped plate 709, guide rails 710 are symmetrically provided. The guide rails 710 are parallel to the side surface of the base 1. A same fixed shaft 711 is provided between the two guide rails 710. The top and bottom ends of the fixed shaft 711 are respectively slidably installed in the two guide rails 710. The fixed shaft 711 is vertically inserted through the free end of the activity rod 708. On the separated sides of the two U-shaped plates 709, connecting plates 712 are fixedly connected. The bottom of the connecting plate 712 is fixedly connected with the top of the base 1. A rubber strip 12 is fixedly connected to the bottom wall of the positioning groove, and the size of the rubber strip 12 matches the size of the positioning groove.

[0033] After the workpiece 62 is centered and clamped by two clamping discs 61, first loosen the positioning pins 703 on the two positioning plates 702, and then push the two columns 701 so that the arc-shaped guide plates 705 on the top fixing rings 704 thereof are in close contact with the corresponding sides of the clamping discs 61. Subsequently, shake the fixing rod through the handle to drive the clamping disc 61 to rotate. As the clamping disc 61 rotates, the lever 68 on the clamping disc 61 gradually comes into contact with the corresponding arc-shaped guide plate 705 driven by the clamping disc 61. As the lever 68 comes into contact with the arc-shaped guide plate 705, the lever 68 can generate a thrust on the arc-shaped guide plate 705 through the arc surface of the arc-shaped guide plate 705, so that the arc-shaped guide plate 705 drives the fixing ring 704 and the corresponding column 701 to move away from the clamping disc 61. During this process, since the two clamping discs 61 respectively correspond to the large and small ends of the tapered workpiece 62, after the arc-shaped clamping plates 67 on the two clamping discs 61 clamp the workpiece 62, the distances from the free ends of the levers 68 to the surface of the workpiece 62 are also different. Therefore, when the levers 68 on the two clamping discs 61 come into contact with the corresponding arc-shaped guide plates 705, the distances by which the arc-shaped guide plates 705 are pushed are also different, which enables the two columns 701 to be distributed front and back;

[0034] During the movement of the two columns 701, the guide rod 707 gradually deflects in the horizontal direction, and the two movable balls 706 can adaptively deflect in the corresponding fixing rings 704. In addition, during the deflection of the guide rod 707, the movable rods 708 at both ends of the guide rod 707 are respectively restricted by the cooperation of the guide rails 710 inside the U-shaped plate 709 and the fixed shaft 711, so that the two movable rods 708 can gradually extend out of the guide rod 707 by a certain distance, and further enable the guide rod 707 to deflect smoothly;

[0035] As the clamping disc 61 continues to rotate, when the lever 68 separates from the arc-shaped guide plate 705, both the arc-shaped guide plate 705 and the column 701 stop moving. At this time, the guide rod 707 can be parallel to the surface of the tapered workpiece 62. Subsequently, tighten the two positioning pins 703 in turn to lock the adjusted positions of the columns 701 in cooperation with the rubber strips 12 in the positioning grooves. After the positions of the two columns 701 are locked, install the lever dial indicator for measurement on the guide rod 707 and adjust the lever dial indicator so that its measuring end is in close contact with the surface of the tapered workpiece 62. Subsequently, move the lever dial indicator along the direction of the guide rod 707. At this time, the lever dial indicator can slide parallel to the surface of the tapered workpiece 62 under the restriction of the guide rod 707, thus completing the straightness detection operation of the surface of the tapered workpiece 62.

[0036] As Figure 2As shown, the fixed column 63 is of a hollow design. A jack 8 is penetrated and opened at the center of the clamping disc 61, and the jack 8 communicates with the inside of the fixed column 63. A magnetic circular plate 9 is detachably installed at the opening of the jack 8. The side of the circular plate 9 close to the workpiece 62 is flush with the side of the clamping disc 61 close to the workpiece 62. The circular plate 9 is in a convex shape, and a notch is opened at the intersection of the socket and the edge of the circular plate 9.

[0037] By providing the jack 8, when clamping the workpiece 62 with flat ends, the circular plate 9 can be blocked at the opening of the jack 8, thus meeting the clamping requirements for this type of workpiece 62.

[0038] When clamping some conical workpieces 62 with tips, the circular plate 9 adsorbed at the jack 8 can be dug out through the notch position. Then, the tip of the workpiece 62 can be inserted into the jack 8, thereby increasing the clamping stability of this type of workpiece 62 and avoiding the tip of the workpiece 62 being damaged by the clamping disc 61.

[0039] Such as Figure 1 and Figure 4 As shown, the front side of the column 701 is fixedly connected to the L-shaped rod 10, and the vertical section of the L-shaped rod 10 faces upward. A storage groove is opened on the front side of the base 1. A straight plate 11 is placed in the storage groove. The length of the straight plate 11 is greater than the maximum distance between the two L-shaped rods 10. The thickness of the straight plate 11 is equal to the distance between the inner side of the L-shaped rod 10 and the column 701. A strip-shaped handle is fixedly connected to the front side of the straight plate 11, and the strip-shaped handle is located outside the storage groove.

[0040] By providing the L-shaped rod 10 on the front side of the column 701, when it is necessary to detect the straightness of regular cylindrical or long-strip workpieces 62, the straight plate 11 is taken out of the storage groove by pinching the strip-shaped handle. Then, the straight plate 11 is inserted into the position between the two L-shaped rods 10 and the column 701, so that the two columns 701 can be in the same plane under the limiting action of the straight plate 11. Furthermore, when the position of the column 701 is adjusted by the lever 68, the two columns 701 can maintain the same motion state, which is more conducive to keeping the guide rod 707 parallel to the workpiece 62 and ensuring the accuracy during measurement.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it.

Claims

1. A metal rod machining straightness inspection clamping tool, comprising a base (1), characterized in that: The top of the base (1) is provided with a groove, in which two movable blocks (2) are slidably mounted, and a movable plate (3) is fixedly connected to the top of the movable block (2), and a same screw rod (4) is threadedly penetrated and rubbed between the two movable blocks (2), and the threads of the screw rod (4) and the corresponding parts of the two movable blocks (2) are designed oppositely, one end of the screw rod (4) is rotatably penetrated and inserted into one side of the base (1), and the end of the screw rod (4) is connected to a motor (5), and the other end of the screw rod (4) is vertically rotatably connected to the groove wall of the groove, and a clamping assembly (6) is installed on the top of the movable plate (3), and the front sides of the two clamping assemblies (6) are provided with a same adjustment assembly (7); The clamping assembly (6) comprises a clamping plate (61), a workpiece (62) to be clamped is provided between the two clamping plates (61), a fixing column (63) is vertically fixedly connected at the center of the circle on the side away from each other of the two clamping plates (61), a support column (64) is rotatably sleeved on the fixing column (63), the support column (64) is fixedly connected to the top of the movable plate (3), the end of the fixing column (63) away from the fixing column (63) is connected to a crank (65), and the side of the clamping plate (61) away from the fixing column (63) is open. A plurality of movable grooves are provided, and the plurality of movable grooves are distributed in an annular shape, the side of the movable groove away from the center of the clamping disk (61) is connected to the side of the clamping disk (61), an electric slider (66) is slidably installed in the movable groove, the side of the electric slider (66) away from the fixed column (63) is fixedly connected to an arc-shaped clamping plate (67), and the arc-shaped clamping plate (67) is located on the side of the electric slider (66) close to the center of the clamping disk (61), and the end of the electric slider (66) away from the center of the clamping disk (61) is vertically fixedly connected to a lever (68); The adjustment assembly (7) comprises two upright posts (701), the two upright posts (701) being respectively located vertically on the tops of the two movable plates (3), a slide groove being provided on the tops of the movable plates (3) at corresponding positions of the bottoms of the upright posts (701), the slide groove being parallel to the side of the base (1), and the bottoms of the upright posts (701) being slidably mounted in the slide groove, a positioning plate (702) being vertically fixedly connected to the separated sides of the two upright posts (701), the positioning plate (702) being close to the tops of the movable plates (3), and a fixed screw thread being inserted through the tops of the positioning plates (702) The bottom of the positioning pin (703) corresponds to a positioning groove on the top of the movable plate (3) which is parallel to and of equal length to the slide groove. The bottom of the positioning pin (703) is inserted into the positioning groove. The top of the column (701) is fixedly connected with a fixing ring (704), and the center of the fixing ring (704) is located at the same height as the center of the clamping plate (61). The rear side of the fixing ring (704) is fixedly connected with an arc-shaped guide plate (705), and the arc-shaped guide plate (705) protrudes in a direction close to the clamping plate (61). 5) is located in the same plane as the lever (68), a movable ball (706) is rotatably mounted on the inner side of the fixed ring (704), a guide rod (707) is slidably inserted between the two movable balls (706), both ends of the guide rod (707) are slidably inserted with movable rods (708), the free ends of the two movable rods (708) are provided with U-shaped plates (709), the openings of the two U-shaped plates (709) are opposite, and the free ends of the two movable rods (708) are respectively located on the inner sides of the openings of the two U-shaped plates (709), and the U-shaped plates (709) ) are symmetrically provided with guide rails (710) at the inner top and inner bottom of the base (1), the guide rails (710) being parallel to the side of the base (1), a same fixed shaft (711) being provided between the two guide rails (710), and the top and bottom ends of the fixed shaft (711) being slidably mounted in the two guide rails (710), respectively, the fixed shaft (711) vertically penetrates and is plugged into the free end of the movable rod (708), and a connecting plate (712) is fixedly connected to the separated sides of the two U-shaped plates (709), and the bottom of the connecting plate (712) is fixedly connected to the top of the base (1).

2. The metal rod machining straightness inspection clamping tool according to claim 1, characterized in that: The fixing column (63) is hollow in design, a plug hole (8) is provided through the center of the clamping disk (61), and the plug hole (8) is connected to the inside of the fixing column (63), a magnetic circular plate (9) is detachably installed at the opening of the plug hole (8), and the side of the circular plate (9) close to the workpiece (62) is flush with the side of the clamping disk (61) close to the workpiece (62).

3. The metal rod machining straightness inspection clamping tool according to claim 1, characterized in that: The front side of the upright post (701) is fixedly connected to the L-shaped rod (10), and the vertical section of the L-shaped rod (10) faces upwards. The front side of the base (1) is provided with a storage groove, and a straight plate (11) is placed in the storage groove. The length of the straight plate (11) is greater than the maximum distance between the two L-shaped rods (10), and the thickness of the straight plate (11) is equal to the distance between the inner side of the L-shaped rod (10) and the upright post (701).

4. The metal rod machining straightness inspection clamping tool according to claim 1, characterized in that: A rubber strip (12) is fixedly connected to the bottom groove wall of the positioning groove, and the size of the rubber strip (12) matches the size of the positioning groove.

5. The metal rod machining straightness inspection clamping tool according to claim 3, characterized in that: A strip handle is fixedly connected to the front side of the straight plate (11), and the strip handle is located outside the storage slot.

6. The metal rod machining straightness inspection clamping tool according to claim 2, characterized in that: The circular plate (9) is in the shape of a boss, and a notch is provided at the junction of the socket and the edge of the circular plate (9).

7. The metal rod machining straightness inspection clamping tool according to claim 1, characterized in that: The free end of the lever (68) is always located outside the movable groove, and the free end of the lever (68) is designed as an arc.

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