A build side deviation measurement device for a metal solid state additive process

Abstract

The utility model provides a kind of metal solid additive process's group blank side deviation measuring device, including displacement component and the measuring component being set on displacement component, measuring device is used to measure the distance between the upper blank of the upper blank and the lower blank of the lower blank stacked together respectively to the preset reference between the upper side of the upper blank to be measured and the lower side of the lower blank to be measured, the upper side to be measured and the lower side to be measured are all towards the same direction;Displacement component includes guide rail and mechanical arm;Measuring component includes distance measuring instrument;The end of mechanical arm is set on guide rail, and distance measuring instrument is set on the front end of mechanical arm;Mechanical arm moves along guide rail can make distance measuring instrument obtain the distance between multiple points of the upper side to be measured and the preset reference, to be able to replace the measurement of the side position deviation of upper and lower blank by artificial.

Description

Technical Field

[0001] This utility model belongs to the field of measurement technology, specifically relating to a device for measuring the side deviation of blank assembly in a metal solid additive manufacturing process. Background Technology

[0002] Solid-state additive manufacturing is a novel metal processing technology that aims to achieve seamless connection between multiple metal base materials through specific processes, thereby producing high-quality, homogeneous large forgings.

[0003] In solid-state additive manufacturing, the weight of a single basic metal billet can exceed 3 tons. Stacking multiple large-sized, high-mass metal billets requires manual operation of an overhead crane to clamp the billets and slowly align and lower them. When two billets are close together, manual alignment is still necessary to ensure the alignment accuracy. If the upper billet is not aligned with the lower billet, the positional difference between the two billets needs to be measured. If the positional difference is small and within the allowable error range, the next step can be carried out. If the error is large and exceeds the reasonable allowable range, the upper billet is then lifted again, manually aligned again, and then the overhead crane moves the upper billet down onto the lower billet.

[0004] In existing technologies, the positional difference between the upper and lower blanks is usually measured manually, which is inefficient, risky, and not conducive to automated production.

[0005] How to replace manual measurement of the side position deviation of the upper and lower blanks is a technical problem that urgently needs to be solved. Utility Model Content

[0006] Therefore, this utility model provides a device for measuring the side deviation of the billet assembly in the solid metal additive manufacturing process, which can replace manual measurement of the side position deviation of the upper and lower billets.

[0007] This invention provides a device for measuring the side deviation of a billet in a solid metal additive manufacturing process. The device includes a displacement assembly and a measuring assembly mounted on the displacement assembly. The measuring assembly measures the distances between the upper side of the upper billet and the lower side of the lower billet to be measured, both of which are stacked together, and a preset reference. Both the upper and lower sides face the same direction. The displacement assembly includes a guide rail and a robotic arm. The measuring assembly includes a distance measuring instrument. The end of the robotic arm is mounted on the guide rail, and the distance measuring instrument is mounted at the front end of the robotic arm. Movement of the robotic arm along the guide rail enables the distance measuring instrument to acquire the distances between multiple points on the upper side of the billet to be measured and the preset reference.

[0008] In some embodiments, the distance measuring instrument includes a reference plane and a light source, the reference plane being perpendicular to the light emitted by the light source, and rolling elements being provided at both the upper and lower ends of the reference plane.

[0009] In some embodiments, the rolling element is a hinged roller.

[0010] In some embodiments, the roller includes a magnet.

[0011] In some embodiments, when the surface roughness of the blank is greater than a preset roughness, the width of the outer circumferential surface of the roller in its own axial direction is greater than a preset width; when the surface roughness of the blank is less than a preset roughness, the width of the outer circumferential surface of the roller in its own axial direction is less than or equal to a preset width.

[0012] In some embodiments, the distance measuring instrument is detachably mounted on the front end of the robotic arm.

[0013] In some embodiments, the robotic arm includes a base slidably disposed on the guide rail, a support plane disposed on the base, a rotating part disposed on the support plane, a plurality of support arms capable of relative rotation disposed sequentially on the rotating part, and a distance measuring instrument disposed on the end support arm.

[0014] In some embodiments, the plurality of arms include a first arm and a second arm, the first end of the first arm being hinged to the rotating part and driven by a first motor; the first end of the second arm being hinged to the end of the first arm and driven by a second motor; an automatic alignment part is provided between the distance measuring instrument and the end of the second arm, one end of the automatic alignment part being fixed to the distance measuring instrument, and the other end being hinged to the end of the second arm and driven by a third motor.

[0015] When the supporting plane is horizontal, the output shafts of the first motor, the second motor, and the third motor are all in the horizontal direction.

[0016] In some embodiments, the rotating part is provided with a first hole and a second hole that are perpendicular to each other. The housing of the first motor is fixedly disposed in the first hole, and the output shaft of the first motor extends toward the base and is fixed together with the base. The housing of the second motor is fixed to the head end of the first arm, and the output shaft of the second motor passes through the first arm and is fixed in the second hole.

[0017] In some embodiments, the automatic alignment part includes a first connector and a second connector hinged together, the first connector being fixed to the distance measuring instrument, and the second connector being hinged to the end of the second arm; when the support plane is horizontal, the rotation axis between the first connector and the second connector is vertical.

[0018] This invention, by setting a guide rail below the robotic arm, allows the robotic arm to move along the guide rail, thereby enabling a single distance measuring instrument to measure the distance between the side of the upper blank and the preset benchmark over a large range, eliminating the need for manual measurement, effectively avoiding measurement errors caused by human factors, improving measurement accuracy, and facilitating the automation of production. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] Figure 1 This is a first-view schematic diagram of the measuring device according to an embodiment of the present invention;

[0021] Figure 2 This is a second-view schematic diagram of the measuring device according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of a distance measuring instrument according to an embodiment of the present invention;

[0023] Figure 4 This is an embodiment of the present utility model. Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 This is a side view of the distance measuring instrument according to an embodiment of the present utility model;

[0025] Figure 6 This is a side view showing the positional relationship between the upper and lower blanks in an embodiment of this utility model.

[0026] Figure 7 This is an embodiment of the present utility model. Figure 6 Top view;

[0027] Figure 8 This is a schematic diagram of the angle α formed when the side surfaces of the upper and lower blanks are projected downwards according to an embodiment of this utility model.

[0028] Figure 9This is a schematic diagram of the distance measuring instrument measuring the distance between the side of the lower billet and a preset reference when the downward projection of the side of the upper billet and the side of the lower billet intersect and are located above the solid of the lower billet in an embodiment of this utility model.

[0029] Figure 10 This is an embodiment of the present utility model. Figure 9 Enlarged view at point B in the middle;

[0030] Figure 11 This is a schematic diagram of the distance measuring instrument measuring the distance between the side of the upper blank and a preset reference when the downward projection of the side of the upper blank and the side of the lower blank intersect and are located above the solid of the lower blank in an embodiment of this utility model.

[0031] Figure 12 This is an embodiment of the present utility model. Figure 11 Enlarged view at point C;

[0032] Figure 13 This is an embodiment of the present utility model. Figure 11 Top view;

[0033] Figure 14 This is an embodiment of the present utility model. Figure 13 Enlarged view at point D;

[0034] Figure 15 This is a schematic diagram of the rotating part according to an embodiment of the present invention;

[0035] Figure 16 This is a schematic diagram of the second connecting member according to an embodiment of the present utility model;

[0036] Figure 17 This is a schematic diagram of the first connecting member according to an embodiment of the present utility model.

[0037] The attached figures are labeled as follows:

[0038] 1. Robotic arm; 101. First arm; 102. Second arm; 2. Distance measuring instrument; 201. Reference plane; 202. Rolling element; 3. Guide rail; 401. First motor; 402. Second motor; 403. Third motor; 404. Rotary motor; 5. Base; 6. Rotating part; 601. First hole; 602. Second hole; 701. First connector; 702. Second connector; 801. Upper blank; 802. Lower blank. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0040] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0041] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0042] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0043] This invention provides a device for measuring the side deviation of billets in a solid metal additive manufacturing process, which can replace manual measurement of the side position deviation of upper and lower billets.

[0044] See also Figure 1-17As shown, this utility model provides a device for measuring the side deviation of a blank in a solid metal additive manufacturing process. The device includes a displacement assembly and a measuring assembly mounted on the displacement assembly. The measuring assembly measures the distances between the upper side of the upper blank 801 and the lower side of the lower blank 802, which are stacked together, and a preset reference. Both the upper and lower sides face the same direction. The displacement assembly includes a guide rail 3 and a robotic arm 1. The measuring assembly includes a distance measuring instrument 2. The end of the robotic arm 1 is mounted on the guide rail 3, and the distance measuring instrument 2 is mounted at the front end of the robotic arm 1. Moving the robotic arm 1 along the guide rail 3 allows the distance measuring instrument 2 to acquire the distances between multiple points on the upper side of the blank and the preset reference.

[0045] This application involves mounting a distance measuring instrument 2 on a robotic arm 1. In application, the guide rail 3 is kept parallel to the lower side of the lower blank 802 to be measured. The spatial orientation of the distance measuring instrument 2 is adjusted by the robotic arm 1 so that the light wave emitted by the distance measuring instrument 2 is perpendicular to the side of the lower blank 802. The distance measuring instrument 2 measures the distance L1 from the side of the lower blank 802 to a preset reference. The robotic arm 1 is controlled to move the distance measuring instrument 2 upwards, and then the robotic arm 1 is controlled to move along the guide rail 3 to both ends of the upper side of the upper blank 801 to be measured, measuring the distance between the two ends of the upper side of the upper blank 801 and the preset reference. Figure 8 As shown, the distances from the two ends of the upper side of the upper blank 801 to the preset reference are measured as L2 and L3, respectively. The differences |△1|=L1-L2 and |△2|=L1-L3 are calculated. When both |△1| and |△2| are within a reasonable range, the position of the side of the upper blank 801 relative to the side of the lower blank 802 can be considered reasonable. The positions of the other sides can be measured using the same method. Compared with the prior art, this application sets the robotic arm 1 on the guide rail 3, allowing the robotic arm 1 to slide on the guide rail 3. This enables the robotic arm 1 to measure the distance between the two ends of the side of the upper blank 801 and the preset reference within a larger range, eliminating the need for manual measurement, avoiding the risks and measurement errors caused by manual measurement, and also facilitating automated production.

[0046] To further reduce the difficulty of adjusting the position of the upper billet 801, the deviation angle difference formed by the downward projection of the upper side of the upper billet 801 to be measured and the lower side of the lower billet 802 to be measured can be measured. After obtaining the deviation angle, when manually adjusting the upper billet 801 in the hoisting state according to the size of the deviation angle, we can have a clear understanding (such as the amount of force applied), and we can also adjust the number and position distribution of personnel according to the size of the deviation angle.

[0047] like Figure 6-8As shown, the deviation angle is measured using the data △1 and △2 obtained above, and the distance h1 between the position when the measuring instrument obtains L2 and the position when it obtains L3 is as follows: Figure 13 As shown, the angle α between the downward projections of the side surface of the upper billet 801 and the side surface of the lower billet 802 is given by tanα = (|△2-△1|) / h1. Therefore, α = arctan(|△2-△1|) / h1. This allows calculation of the angle difference α between the upper and lower sides. Based on the magnitude of α, after the upper billet 801 is lifted a certain distance from the lower billet 802, the operator can apply appropriate force to the upper billet 801 while paying attention to its rotation direction and angle. Because the operator can be more aware of the situation and apply appropriate force, the alignment accuracy between the upper and lower billets 801 can be improved, and the risks of manual operation can be reduced.

[0048] Preferred, such as Figure 3 , Figure 4 and Figure 5 As shown, the distance measuring instrument 2 includes a reference plane 201 and a light source. The reference plane 201 is perpendicular to the light emitted by the light source. Rolling elements 202 are provided at both the upper and lower ends of the reference plane 201. By setting the reference plane 201, rolling elements 202 are provided on the reference plane 201; when the side of the upper blank 801 is not aligned with the side of the lower blank 802 and is located above the solid of the lower blank 802 (e.g.) Figure 9 and Figure 13 As shown in the figure, at this time, the rolling element 202 on the reference plane 201 of the distance measuring instrument 2 can be brought into contact with the side of the lower blank 802 by the robotic arm 1 to obtain the distance L4 between the side of the lower blank 802 and the preset reference. The robotic arm 1 is controlled to move the distance measuring instrument 2 upward so that the light emitted by the distance measuring instrument 2 can reach the side of the upper blank 801. At the same time, the rolling element 202 at the lower end of the reference plane 201 is always kept in contact with the side of the lower blank 802. Then, the robotic arm 1 is controlled to move along the guide rail 3 to measure the distances L5 and L6 between the two positions of the side of the upper blank 801 and the preset reference. Since the rolling element 202 is always in contact with the side of the lower blank 802, the measured distances L5 and L6 between the side of the upper blank 801 and the preset reference are more accurate.

[0049] The preset reference can be set to reference plane 201.

[0050] like Figure 9-14As shown, the distance between the two positions is h2 (the distance h2 that the robotic arm 1 moves along the guide rail 3 between the two positions). Therefore, the deflection angle β of the side of the upper billet 801 relative to the side of the lower billet 802 can be obtained more accurately. |△3|=L5-L4, |△4|=L6-L4, tanβ=(|△4-△3|) / h2; β=arctan(|△4-△3|) / h2.

[0051] Preferably, the rolling element 202 is a hinged roller. Setting the rolling element 202 as a roller makes the rotation smoother; as the distance measuring instrument 2 moves along the guide rail 3, it can acquire the distances from multiple different positions on the side of the upper blank 801 to a preset reference; based on these multiple values, multiple deflection angles can be obtained, and the average of these multiple deflection angles is taken to obtain a more accurate deflection angle.

[0052] Preferably, the roller includes a magnet.

[0053] The roller includes a magnet, and the lower blank 802 can be magnetically attracted to the magnet. This ensures that the roller can maintain stable contact with the side of the lower blank 802 as it rolls along the side of the lower blank 802. This helps to improve the accuracy of obtaining the distance between the side of the lower blank 802 and the preset reference. Similarly, it also helps to improve the accuracy of obtaining the distance between the side of the upper blank 801 and the preset reference.

[0054] Preferably, when the surface roughness of the blank 802 is greater than a preset roughness, the width of the outer circumferential surface of the roller in its own axial direction is greater than a preset width; when the surface roughness of the blank 802 is less than a preset roughness, the width of the outer circumferential surface of the roller in its own axial direction is less than or equal to a preset width.

[0055] When the side surface roughness of the lower blank 802 is large, and small pits and pits are provided, because the width of the roller is greater than the preset width, the contact area between the roller and the side surface is larger, which can smoothly cross the pits and pits. This is conducive to the smooth movement of the distance measuring instrument 2 along the side surface of the lower blank 802, thereby improving the accuracy of obtaining the distance between the lower blank 802 and the preset reference.

[0056] When the surface quality of the side of the blank 802 is good, that is, when the roughness is low, since the width of the roller is less than or equal to the preset width, the contact area between the roller and the side surface is small. This can effectively avoid the phenomenon that the roller cannot rotate smoothly due to dust, impurities, etc. adhering to the side of the blank 802. This is conducive to the smooth movement of the distance measuring instrument 2 along the side surface of the blank 802, thereby improving the accuracy of obtaining the distance between the blank 802 and the preset reference.

[0057] Preferably, the distance measuring instrument 2 is detachably mounted at the front end of the robotic arm 1.

[0058] The distance measuring instrument 2 is detachable, making it easy to replace and maintain.

[0059] In addition, the distance measuring instrument 2 can be replaced with other instruments set at the front end of the robotic arm 1, such as a roughness measuring instrument, which can be used to measure the roughness of different areas of the surface of the blank.

[0060] Preferred, such as Figure 15 As shown, the robotic arm 1 includes a base 5 that is slidably mounted on the guide rail 3. A support plane is provided on the base 5, and a rotating part 6 is provided on the support plane. Multiple support arms that can rotate relative to each other are sequentially arranged on the rotating part 6. The distance measuring instrument 2 is mounted on the support arm at the end.

[0061] By incorporating base 5, which moves along the guide rail, the stability of the distance measuring instrument 2's movement is improved. The inclusion of a rotating part 6 facilitates a wider range of movement for the distance measuring instrument 2.

[0062] Preferred, such as Figure 16 and Figure 17 As shown, the plurality of support arms include a first arm 101 and a second arm 102. The first end of the first arm 101 is hinged to the rotating part 6 and driven by a first motor 401. The first end of the second arm 102 is hinged to the end of the first arm 101 and driven by a second motor 402. An automatic alignment part is provided between the distance measuring instrument 2 and the end of the second arm 102. One end of the automatic alignment part is fixed to the distance measuring instrument 2, and the other end is hinged to the end of the second arm 102 and driven by a third motor 403. When the support plane is horizontal, the output shafts of the first motor 401, the second motor 402, and the third motor 403 are all in the horizontal direction.

[0063] The third motor 403 is a micro motor with two output shafts. The intermediate housing is fixed to the second connector 902, and the two output shafts are fixed to the second arm. The third motor 403 is small in size, occupying almost no external space, which is beneficial for miniaturizing the robotic arm. Furthermore, the third motor 403 is closer to the distance measuring instrument 2, resulting in a shorter distance between the motor and the instrument. This allows the torque output from the third motor 403 to be applied more precisely to the distance measuring instrument 2 (the shorter the distance between the third motor 403 and the distance measuring instrument 2, the smaller the structural deformation).

[0064] With the above settings, the first arm 101, the second arm 102, and the distance measuring instrument can all swing in the vertical plane. This allows the distance measuring instrument 2 to move in the vertical direction and move closer to or further away from the plane to be measured. Ultimately, the distance measuring instrument 2 can accurately measure the distance between the upper side of the blank 801 to be measured and the preset reference.

[0065] Preferred, such as Figure 15 As shown, the rotating part 6 is provided with a first hole 601 and a second hole 602 that are perpendicular to each other. The housing of the first motor 401 is fixedly disposed in the first hole 601, and the output shaft of the first motor 401 extends toward the base 5 and is fixed together with the base 5. The housing of the second motor 402 is fixed to the head end of the first arm 101, and the output shaft of the second motor 402 passes through the first arm 101 and is fixed in the second hole 602.

[0066] With the above configuration, the first motor 401 is housed within the first hole 601, reducing its space occupation and helping to prevent external impacts on the first motor 401, thereby ensuring the rotational stability of the first arm 101. The second motor 402 further enhances the swing stability of the first arm 101.

[0067] Preferably, the automatic alignment part includes a first connector 701 and a second connector 702 hinged together. The first connector 701 is fixed together with the distance measuring instrument 2, and the second connector 702 is hinged together with the end of the second arm 102. When the support plane is horizontal, the rotation axis between the first connector 701 and the second connector 702 is in the vertical direction.

[0068] With the above settings, when it is necessary for the rollers on the reference plane 201 of the distance measuring instrument 2 to contact the lower side of the blank 802 to be measured, the first connecting member 701 can rotate relative to the second connecting member 702 under pressure (the force applied by the robotic arm towards the lower side to be measured), thereby making the reference plane 201 parallel to the lower side of the blank 802 to be measured, so that the rolling elements 202 on the reference plane 201 can all contact the lower side to be measured, thereby making the distance measuring instrument 2 move more stably along the lower side to be measured, and thus improving the accuracy of the distance measuring instrument 2 measurement.

[0069] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0070] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A device for measuring the side deviation of a blank in a solid metal additive manufacturing process, comprising a displacement assembly and a measuring assembly disposed on the displacement assembly, characterized in that, The measuring device is used to measure the distance between the upper side of the upper blank (801) to be measured and the lower side of the lower blank (802) to be measured from a preset reference, respectively, in the upper blank (801) and the lower blank (802) stacked together. The upper side and the lower side to be measured are both facing the same direction. The displacement component includes a guide rail (3) and a robotic arm (1). The measuring component includes a distance measuring instrument (2). The end of the robotic arm (1) is set on the guide rail (3), and the distance measuring instrument (2) is set at the front end of the robotic arm (1). The movement of the robotic arm (1) along the guide rail (3) enables the distance measuring instrument (2) to obtain the distance between multiple points of the upper side to be measured and the preset reference.

2. The apparatus for measuring the side deviation of the blank in the solid metal additive manufacturing process according to claim 1, characterized in that, The distance measuring instrument (2) includes a reference plane (201) and a light source. The reference plane (201) is perpendicular to the light emitted by the light source. Rolling elements (202) are provided at both the upper and lower ends of the reference plane (201).

3. The apparatus for measuring the side deviation of the blank in the solid metal additive manufacturing process according to claim 2, characterized in that, The rolling element (202) is a hinged roller.

4. The apparatus for measuring the side deviation of the blank in the solid metal additive manufacturing process according to claim 3, characterized in that, The roller includes a magnet.

5. The apparatus for measuring the side deviation of the blank in the solid metal additive manufacturing process according to claim 3, characterized in that, When the surface roughness of the blank (802) is greater than the preset roughness, the width of the outer circumferential surface of the roller in its own axial direction is greater than the preset width; when the surface roughness of the blank (802) is less than the preset roughness, the width of the outer circumferential surface of the roller in its own axial direction is less than or equal to the preset width.

6. The apparatus for measuring the side deviation of the blank in the solid metal additive manufacturing process according to claim 1, characterized in that, The distance measuring instrument (2) is detachably mounted at the front end of the robotic arm (1).

7. The apparatus for measuring the side deviation of the blank in a solid metal additive manufacturing process according to any one of claims 1-6, characterized in that, The robotic arm (1) includes a base (5) slidably mounted on the guide rail (3), a support plane is provided on the base (5), a rotating part (6) is provided on the support plane, and a plurality of support arms capable of relative rotation are arranged sequentially on the rotating part (6), and the distance measuring instrument (2) is mounted on the support arm at the end.

8. The apparatus for measuring the side deviation of the blank in the solid metal additive manufacturing process according to claim 7, characterized in that, The plurality of support arms include a first arm (101) and a second arm (102). The first end of the first arm (101) is hinged to the rotating part (6) and driven by a first motor (401). The first end of the second arm (102) is hinged to the end of the first arm (101) and driven by a second motor (402). An automatic alignment part is provided between the distance measuring instrument (2) and the end of the second arm (102). One end of the automatic alignment part is fixed to the distance measuring instrument (2), and the other end is hinged to the end of the second arm (102) and driven by a third motor (403). When the support plane is horizontal, the output shafts of the first motor (401), the second motor (402), and the third motor (403) are all in the horizontal direction.

9. The apparatus for measuring the side deviation of the blank in the solid metal additive manufacturing process according to claim 8, characterized in that, The rotating part (6) is provided with a first hole (601) and a second hole (602) that are perpendicular to each other. The housing of the first motor (401) is fixedly disposed in the first hole (601). The output shaft of the first motor (401) extends toward the base (5) and is fixed together with the base (5). The housing of the second motor (402) is fixed at the head end of the first arm (101). The output shaft of the second motor (402) passes through the first arm (101) and is fixed in the second hole (602).

10. The apparatus for measuring the side deviation of the blank in the solid metal additive manufacturing process according to claim 8, characterized in that, The automatic alignment part includes a first connector (701) and a second connector (702) hinged together. The first connector (701) is fixed together with the distance measuring instrument (2), and the second connector (702) is hinged together with the end of the second arm (102). When the support plane is set horizontally, the rotation axis between the first connector (701) and the second connector (702) is in the vertical direction.

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