Workpiece fixing tool and laser cutting machine

Abstract

The utility model relates to a workpiece fixing tool and a laser cutting machine, the workpiece fixing tool is used for the laser cutting machine, and the workpiece fixing tool comprises a fixing base and at least three positioning arms; the positioning arm is arranged on the fixed seat and extends along the height direction; a positioning target spot is formed at one end of the positioning arm away from the fixed seat; wherein in a projection plane perpendicular to the height direction, a connecting line of projections of any two positioning target spots is taken as a reference line, and at least another positioning target spot is located outside the reference line. By designing at least three positioning arms, positioning points with at least three positioning target points distributed and fixed on a workpiece with the bottom surface being an irregular curved surface are formed, any three positioning points can form a stable triangular supporting structure, the degree of freedom of translation and rotation of the workpiece can be eliminated, and positioning and supporting of the workpiece are achieved. The laser cutting machine provided by the utility model has the corresponding beneficial effects due to the adoption of the workpiece fixing tool.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of laser cutting, in particular to a workpiece fixing tool and a laser cutting machine. BACKGROUND

[0002] Three-dimensional laser cutting machines can flexibly perform various processes on three-dimensional processing objects, and are widely used in various manufacturing industries such as aerospace, automobiles, ships, machinery manufacturing, elevator manufacturing, advertising production, household appliance manufacturing, medical devices, hardware, decoration, and metal outsourcing services.

[0003] In order to prevent the workpiece from being offset by external force during laser cutting, causing damage to the cut workpiece, and even causing laser injury to other personnel, the laser cutting machine needs to have the function of positioning and fixing the processing object (hereinafter referred to as the workpiece). In related technologies, limiting push rods or positioning clamps are generally used in pairs to fix the workpiece by pressing and positioning, thereby achieving the positioning of the workpiece. However, when the laser cutting machine processes workpieces with different shapes of curved surfaces, the positioning method in related technologies is not applicable, because the contact surface between the curved surface of the workpiece and the clamping component is irregular, which will cause the workpiece to be not clamped stably, and the workpiece is likely to be offset. If the clamping force is increased to improve the stability of the workpiece, the workpiece may be damaged by the clamping component. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the embodiments of the present application aim to provide a workpiece fixing tool and a laser cutting machine to fix the workpiece, especially the workpiece with different shapes of curved surfaces.

[0005] The first aspect of the embodiments of the present application provides a workpiece fixing tool for a laser cutting machine, comprising a fixing seat and at least three positioning arms; the positioning arms are arranged on the fixing seat and extend in the height direction, and the end of the positioning arms away from the fixing seat forms a positioning target point; wherein in the projection plane perpendicular to the height direction, with the connecting line of the projections of any two positioning target points as a reference line, at least one other positioning target point is located outside the reference line.

[0006] In an embodiment, the positioning arm comprises a positioning arm body and a positioning disc, the positioning disc is arranged at the end of the positioning arm body away from the fixing seat, and the geometric center of the positioning disc forms the positioning target point.

[0007] In an embodiment, the positioning arm body comprises a first branch arm and a second branch arm, one end of the first branch arm close to the fixing seat is connected to the fixing seat, the other end is connected to one end of the second branch arm, the other end of the second branch arm is connected to the positioning disc, and the extension directions of the first branch arm and the second branch arm intersect.

[0008] In one embodiment, the first supporting arm and the fixing base are movably connected.

[0009] In one embodiment, the first supporting arm and the second supporting arm are movably connected.

[0010] In one embodiment, the workpiece fixing tool further comprises a jacking device arranged on the fixing base and used for jacking the workpiece, the fixing base has a jacking hole, the top side of the jacking hole is open, and at least a part of the jacking device is located in the jacking hole.

[0011] In one embodiment, the workpiece fixing tool further comprises a plurality of supporting mechanisms connected to the fixing base, the supporting mechanisms extend along the height direction, and an end of the supporting mechanism away from the fixing base is formed as a supporting end, the supporting end being capable of moving relative to the fixing base along the height direction.

[0012] In one embodiment, the supporting mechanism comprises a supporting rod and a pulley, the supporting rod extends along the height direction, the pulley is arranged at the top end of the supporting rod body along the height direction, and the pulley is rotatable about a first rotation axis perpendicular to the height direction.

[0013] In one embodiment, the fixing base comprises a fixing base body and a plurality of positioning frames, and the supporting mechanism is sleeved on the positioning frame.

[0014] In one embodiment, the supporting mechanism comprises a positioning member, the positioning frame is formed with at least one positioning through hole, the supporting mechanism is formed with at least two positioning grooves along the height direction, the supporting mechanism is sleeved in the positioning frame, and the positioning member is inserted into the positioning groove after passing through the positioning through hole.

[0015] In another aspect, the embodiment of the present application provides a laser cutting machine comprising the workpiece fixing tool according to any one of the above embodiments.

[0016] The workpiece fixing tool provided by the embodiment of the present application comprises at least three positioning arms, at least three positioning target points are formed on the workpiece with an irregular curved bottom surface, any three positioning points can form a stable triangular supporting structure, the freedom degrees of translation and rotation of the workpiece can be eliminated, and the positioning and supporting of the workpiece can be realized. The laser cutting machine provided by the embodiment of the present application has corresponding beneficial effects due to the use of the above workpiece fixing tool. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a schematic view of a workpiece fixing tool according to an embodiment of the present application;

[0018] Figure 2 FIG. 4 is a schematic view of a positioning arm according to an embodiment of the present application;

[0019] Figure 3 A schematic view of a workpiece positioned by a positioning arm according to an embodiment of the present application;

[0020] Figure 4 A schematic view of a positioning disc according to an embodiment of the present application; Figure 3 A schematic view of a force relationship between a positioning disc and a workpiece at position A according to an embodiment of the present application;

[0021] Figure 5 A schematic view of a fixing base according to an embodiment of the present application;

[0022] Figure 6 A schematic view of a supporting mechanism according to an embodiment of the present application.

[0023] Explanation of reference numerals

[0024] Workpiece fixing tool 100; fixing base 110; jacking hole 110a; fixing base body 111; positioning frame 112; positioning through hole 112a; positioning arm 120; positioning target point 120a; positioning arm body 121; first branch arm 121a; second branch arm 121b; positioning disc 122; supporting mechanism 130; positioning groove 130a; supporting rod 131; pulley 132; workpiece 200. DETAILED DESCRIPTION

[0025] It should be noted that the embodiments in the present application and the technical features in the embodiments can be combined with each other without conflict, and the detailed description in the specific embodiments should be understood as the explanation and description of the present application, and should not be regarded as improper limitation of the present application.

[0026] The orientation terms in the description of the present application are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as a limitation of the present application.

[0027] Three-dimensional laser cutting machines can flexibly perform various process-required machining on three-dimensional machining objects, and are widely used in various manufacturing industries such as aerospace, automobiles, ships, machinery manufacturing, elevator manufacturing, advertising production, household appliance manufacturing, medical devices, hardware, decoration, and metal outsourcing services.

[0028] In order to prevent the workpiece (hereinafter referred to as workpiece) from being offset by external force during laser cutting, causing the cutting part to be damaged, and even causing the laser to injure other personnel, the laser cutting machine needs to have the function of fixing and positioning the workpiece. In the related art, a limiting push rod or a positioning clamp is generally used as a clamping component to fix the workpiece by pressing and positioning, so as to realize the positioning of the workpiece. However, when the laser cutting machine processes workpieces with different shapes of curved outer contours, the positioning method in the related art is not applicable, because the contact surface between the curved surface of the workpiece and the clamping component is irregular, which will cause the workpiece to be not clamped stably, and the workpiece is easy to be offset. If the clamping force is increased to improve the stability of the workpiece, the workpiece will be damaged by the clamping component.

[0029] Therefore, the embodiments of the present application expect to provide a workpiece fixing tool and a laser cutting machine to realize the fixation of the workpiece, especially the workpiece with different shapes of curved surfaces.

[0030] Reference Figure 1 and Figure 2 The first aspect of the embodiments of the present application provides a workpiece fixing tool 100 for a laser cutting machine, comprising a fixing seat 110 and at least three positioning arms 120; the positioning arm 120 is arranged on the fixing seat 110 and extends in the height direction, and the end of the positioning arm 120 away from the fixing seat 110 forms a positioning target point 120a; wherein in the projection plane perpendicular to the height direction, with the connecting line of the projections of any two positioning target points 120a as a reference line, at least one other positioning target point 120a is located outside the reference line.

[0031] In the embodiments, the specific structure of the fixing seat 110 and the positioning arm 120 is not limited.

[0032] In the embodiments, with reference to Figure 2 and Figure 3 in the projection plane perpendicular to the height direction, with the connecting line of the projections of any two positioning target points 120a as a reference line, at least one other positioning target point 120a is located outside the reference line, that is, the positioning target points 120a of the at least three positioning arms 120 are in triangular distribution, so that the workpiece 200 with irregular curved surface can be fixed in the actual application process.

[0033] Specifically, taking the three positioning targets 120a as an example, when the workpiece 200 is ready to be cut, the three positioning targets 120a can be positioned on the three positioning points on the bottom surface of the workpiece 200, so as to realize the fixation of the workpiece 200. The fixation principle is as follows: on the one hand, since the positioning targets 120a position the positioning points, the positioning points cannot freely separate from the positioning targets 120a, and the workpiece 200 cannot freely translate in space; on the other hand, when the workpiece 200 is to be freely rotated about the reference line connected by any two positioning points, the third positioning target 120a will block this rotation trend. In this way, for any workpiece 200 with an irregular curved surface, its six degrees of freedom in the spatial coordinate system, including three degrees of translational freedom and three degrees of rotational freedom about three axes, are all limited. In summary, the workpiece fixation tool 100 of the embodiment can fix the workpiece 200 with an irregular curved surface.

[0034] In some embodiments, with reference to Figure 2 , the positioning arm 120 includes a positioning arm body 121 and a positioning disc 122, the positioning disc 122 is arranged at one end of the positioning arm body 121 away from the fixed base 110, and the geometric center of one surface of the positioning disc 122 away from the fixed base 110 is formed as the positioning target 120a.

[0035] For example, the positioning disc 122 can be a sheet structure with a certain thickness, and the positioning target 120a is formed on one surface of the positioning disc 122 away from the fixed base 110; or the positioning disc 122 can be a triangular prism structure, and the positioning target 120a is formed on one inclined surface of the positioning disc 122 away from the fixed base 110. The surface where the positioning target 120a is located is the support surface of the positioning disc 122 in contact with the workpiece 200. That is, the workpiece 200 and the positioning arm 120 are in surface contact rather than point contact, the contact area is larger, the relative pressure is smaller, and the weight of the workpiece 200 is more evenly distributed on the positioning disc 122, thereby improving the stability of the force.

[0036] Further, in some embodiments, the positioning disc 122 can be a suction disc or made of magnetic or viscous material, so as to strengthen the connection strength between the positioning disc 122 and the workpiece 200, and reduce the possibility of damaging the positioning disc 122 in the repeated disassembly and installation process of the workpiece 200.

[0037] In some embodiments, with reference to Figure 2 , the positioning arm body 121 includes a first branch arm 121a and a second branch arm 121b, one end of the first branch arm 121a close to the fixed base 110 is connected to the fixed base 110, the other end is connected to one end of the second branch arm 121b, the other end of the second branch arm 121b is connected to the positioning disc 122, and the extension directions of the first branch arm 121a and the second branch arm 121b intersect.

[0038] In particular, in combination with Figure 3 And Figure 4 Since the bottom surface of the workpiece 200 is irregular, the contact surface between the workpiece 200 and the positioning disc 122 is likely to be not perpendicular to the height direction. When the workpiece 200 is positioned on the workpiece fixing tool 100, the gravity of the workpiece 200 will be transmitted to the positioning arm 120 through the positioning disc 122, and the load received by the positioning disc 122 will be transmitted downward perpendicular to the contact surface to the second supporting arm 121b. At the same time, the second supporting arm 121b will also provide a support force F1 perpendicular to the contact surface in the opposite direction to the workpiece 200. This support force can be divided into two components in space, the first component F3 upward along the height direction to offset the gravity of the workpiece 200, and the second component F2 inward perpendicular to the height direction to the workpiece 200. Similarly, the other positioning arms 120 will also generate similar inward second components F2. In this way, the second components F2 generated by the multiple positioning arms 120 balance each other to clamp the workpiece 200 in a fixed position. In addition, the first supporting arm 121a can transmit the load from the second supporting arm 121b to the fixed base 110, making the transmission of the gravity of the workpiece 200 more stable and reasonable.

[0039] In this way, the positioning arm body 121 forms a curved arm support structure through the combination of the first supporting arm 121a and the second supporting arm 121b, and the multiple positioning arms 120 can clamp and fix the workpiece 200. In this way, the fixing effect of the positioning arm 120 on the workpiece 200 is not one-way and single-angle, but multi-way and multi-angle. Thus, the first supporting arm 121a and the second supporting arm 121b create a force transmission path, improving the stability of the positioning of the workpiece 200 and enhancing the load capacity of the workpiece fixing tool 100.

[0040] Further, in order to freely adjust the inclination angle of the support surface, in some embodiments, the positioning disc 122 is movably connected with the positioning arm body 121, so that the support surface can be inclined to the horizontal plane. In this way, the positioning disc 122 can adapt to different workpieces 200, so that the support surface can be tangent to the curved surface of different workpieces 200 with different radii, further improving the stability of the fixing.

[0041] In some embodiments, the first supporting arm 121a and the fixed base 110 are movably connected.

[0042] In some embodiments, the first supporting arm 121a and the second supporting arm 121b are movably connected.

[0043] Specifically, the first angle is formed between the extension direction of the first branch arm 121a and the height direction, and the second angle is formed between the extension direction of the second branch arm 121b and the extension direction of the first branch arm 121a. The first angle and / or the second angle can be adjusted to adapt to more types of curved surfaces of the workpiece 200. To this end, the positioning arm 120 comprises a first rotary connecting piece (not shown in the figure) and a second rotary connecting piece (not shown in the figure). The first rotary connecting piece is arranged between the fixed seat 110 and the first branch arm 121a to achieve the movable connection of the first branch arm 121a and the fixed seat 110 and control the size of the first angle. The second rotary connecting piece is arranged between the first branch arm 121a and the second branch arm 121b to achieve the movable connection of the first branch arm 121a and the fixed seat 110 and control the size of the second angle.

[0044] In this way, the activity freedom of the positioning arm 120 is greatly improved, and the extension directions of the first branch arm 121a and the second branch arm 121b can also be freely adjusted. The workpiece fixing tool 100 can be adapted to more workpieces 200, and for a certain specific workpiece 200, the workpiece fixing tool 100 can also adjust the first angle and the second angle to make the stress path of the workpiece 200 to the fixed seat 110 more reasonable, thereby improving the carrying capacity and stability of the workpiece fixing tool 100.

[0045] Further, in some embodiments, the positioning arm 120 further comprises a third rotary connecting piece (not shown in the figure) arranged between the fixed seat 110 and the first rotary connecting piece. The third rotary connecting piece can rotate around an axis, and the rotation axis is parallel to the height direction. In this way, in combination with the first rotary connecting piece, the first branch arm 121a can move around a hemisphere with the position of the third rotary connecting piece as the center of the sphere relative to the fixed seat 110, further improving the activity freedom of the positioning arm 120.

[0046] In some embodiments, the positioning arm 120 further comprises a first self-locking mechanism (not shown in the figure) to limit the activity of the first rotary connecting piece, so that the first rotary connecting piece is in a rotatable state and a limited rotation state.

[0047] Exemplarily, the first self-locking mechanism comprises at least one set of self-locking teeth, when it is required to adjust the first rotary connecting member into the limited rotary state, the self-locking teeth will be engaged with each other to limit the rotation between the first supporting arm 121a and the fixed base 110; when it is required to adjust the first rotary connecting member into the rotatable state, the self-locking teeth can be disengaged with each other to release the self-locking. In other embodiments, the first self-locking mechanism can also be a positioning pin, the first rotary connecting member forms a positioning hole matched with the positioning pin, when it is required to adjust the first rotary connecting member into the limited rotary state, the positioning pin is arranged in the positioning hole to limit the rotation between the first supporting arm 121a and the fixed base 110; when it is required to adjust the first rotary connecting member into the rotatable state, the positioning pin can be pulled out to release the self-locking.

[0048] In some embodiments, the positioning arm 120 further comprises a second self-locking mechanism (not shown in the figure) to limit the activity of the second rotary connecting member, so that the second rotary connecting member is in the rotatable state and the limited rotary state.

[0049] In some embodiments, the positioning arm 120 further comprises a third self-locking mechanism (not shown in the figure) to limit the activity of the third rotary connecting member, so that the third rotary connecting member is in the rotatable state and the limited rotary state.

[0050] Exemplarily, the second self-locking mechanism and the third self-locking mechanism can also be similar structures as the first self-locking mechanism, which will not be described here again.

[0051] In this way, the first self-locking mechanism, the second self-locking mechanism and the third self-locking mechanism can fix the position state of the positioning arm 120, so that the positioning arm 120 will not be easily deformed under force after bearing the load, further improving the stability of the positioning arm 120.

[0052] In some embodiments, referring to Figure 1 , the workpiece fixing tool 100 further comprises a jacking device (not shown in the figure), which is arranged in the fixed base 110 and used for jacking the workpiece 200, the fixed base 110 has a jacking hole 110a, the top side of the jacking hole 110a is open, and at least a part of the jacking device is located in the jacking hole 110a.

[0053] Specifically, the jacking device can be a hydraulic jacking device, a screw jacking device or a scissor jacking device. In the projection plane perpendicular to the height direction, the jacking hole 110a is located at the center position of the fixed base 110, and it can be understood that the center of gravity of the workpiece 200 will also fall within the range of the jacking hole 110a.

[0054] Before processing the workpiece 200, the workpiece 200 needs to be lifted and placed on the workpiece fixing tool 100. When the workpiece 200 with a large mass needs to be lifted, the mechanical bearing capacity of the positioning arm 120 is required, because the main task of the positioning arm 120 is to find a positioning point on the workpiece 200 sufficient to position the workpiece 200, and the positioning point may not overlap with the center of gravity of the irregular workpiece 200. Therefore, it is reasonable to additionally provide a jacking device capable of supporting the workpiece 200 to ensure that the workpiece 200 with a large mass can be lifted. In this way, the jacking device can support the weight of the workpiece 200, and manual lifting of the workpiece 200 is not required, thereby reducing the working intensity of workers and improving efficiency and safety.

[0055] In some embodiments, referring to Figure 1 and Figure 6 The workpiece fixing tool 100 further comprises a plurality of support mechanisms 130 connected to the fixing base 110, the support mechanisms 130 extending along the height direction, and an end of the support mechanisms 130 away from the fixing base 110 being formed as a support end, the support end being movable relative to the fixing base 110 along the height direction.

[0056] In this way, the support mechanisms 130 provide additional support points for the workpiece 200, improving the stability of the workpiece 200. In addition, since the support mechanisms 130 are supported on the circumferential side of the workpiece 200, they not only provide support but also reduce interference with the cutting process. For workpieces 200 with different curved surfaces, the position and distance of the support end relative to the fixing base 110 can be adjusted, so that the workpiece 200 can be placed in a relatively balanced position on the workpiece fixing tool 100, facilitating cutting of the workpiece 200.

[0057] In some embodiments, referring to Figure 1 In the projection plane perpendicular to the height direction, the plurality of support mechanisms 130 are arranged along the circumferential side of the fixing base 110. Exemplarily, in the projection plane perpendicular to the height direction, the fixing base 110 has a rectangular outer contour, and the support mechanisms 130 are divided into two groups and arranged along two long sides of the rectangular outer contour of the fixing base 110, respectively. The support mechanisms 130 can be an integrally formed rod structure that moves as a whole relative to the fixing base 110, or the support mechanisms 130 can include a fixed end and a telescopic end, the support end being formed on the telescopic end and moving by moving the telescopic end relative to the fixing base 110.

[0058] In some embodiments, referring to Figure 1 and Figure 6 The support mechanism 130 comprises a support rod 131 and a pulley 132, the support rod 131 extending along the height direction, and the pulley 132 being arranged at the top end of the support rod 131 along the height direction, the pulley 132 being rotatable about a first rotation axis perpendicular to the height direction.

[0059] It can be understood that when the support mechanism 130 supports the workpiece 200, friction inevitably occurs between the workpiece 200 and the support mechanism 130, and the design of the pulley 132 at the support end can reduce the instability caused by the uneven weight of the workpiece 200 to a certain extent. In addition, after the support mechanism 130 supports the workpiece 200, the position of the workpiece 200 can be fine-tuned through the pulley 132, and then the positioning arm 120 is fixed to the positioning point of the workpiece 200, which facilitates the positioning of the workpiece 200.

[0060] In some embodiments, referring to Figure 5 , the fixing seat 110 includes a fixing seat body 111 and a plurality of positioning frames 112, and the support mechanism 130 is sleeved on the positioning frame 112.

[0061] Specifically, the positioning frame 112 includes a plurality of positioning plates extending in the height direction, and the plurality of positioning plates surround to form the positioning frame 112. The positioning frame 112 can be integrally cast with the fixing seat body 111, or can be welded on the fixing seat body 111.

[0062] In this way, in combination with Figure 1 and Figure 5 , the positioning frame 112 can not only fix the relative position of the support mechanism 130, but also play a certain guiding role, so that the movement direction of the support mechanism 130 relative to the fixing seat 110 is limited in the height direction. In addition, the plurality of positioning frames 112 and the plurality of support mechanisms 130 are matched one by one, and are distributed in the circumferential side of the fixing seat body 111, so that the gravity from the edge side of the workpiece 200 is uniformly transmitted to the fixing seat 110 through the support mechanism 130.

[0063] In some embodiments, referring to Figure 5 and Figure 6 , the support mechanism 130 includes a positioning piece (not shown in the figure), the positioning frame 112 is formed with at least one positioning through hole 112a, and the support mechanism 130 is formed with at least two positioning grooves 130a in the height direction. The support mechanism 130 is sleeved in the positioning frame 112, and the positioning piece is inserted into the positioning groove 130a after passing through the positioning through hole 112a.

[0064] Specifically, according to the positioning and processing requirements of the workpiece 200, the support mechanism 130 can realize step-by-step adjustment of the position of the support mechanism 130 in the height direction through the cooperation between the positioning piece and the positioning groove 130a.

[0065] For convenience of calculation, preferably, the plurality of positioning grooves 130a are uniformly distributed along the height direction, the distance between two positioning grooves 130a connected in sequence is kept consistent, and the support mechanism 130 is further provided with a scale along the height direction to mark the distance and relative height between the positioning grooves 130a.

[0066] It can be understood that the more and denser the positioning grooves 130a are arranged, the higher the precision of the step adjustment of the support end in the height direction can be achieved.

[0067] In some embodiments, the support mechanism 130 and the positioning frame 112 are both provided with a rack (not shown in the figure) extending along the height direction, and the racks are engaged with each other to achieve the stepless adjustment of the position of the support mechanism 130 in the height direction.

[0068] In another aspect, the embodiments of the present application provide a laser cutting machine comprising the workpiece fixing tool 100 of any one of the above embodiments.

[0069] The various embodiments / embodiments provided by the present application can be combined with each other without contradiction.

[0070] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A workpiece holding tool for a laser cutting machine, characterized by, The workpiece fixing tool comprises: a fixing base; at least three positioning arms arranged on the fixing base and extending along a height direction, the ends of the positioning arms away from the fixing base forming positioning targets; wherein, in a projection plane perpendicular to the height direction, with the connecting line of the projections of any two of the positioning targets as a reference line, at least one other of the positioning targets is located outside the reference line.

2. The workpiece holding tooling of claim 1, wherein, The positioning arm comprises a positioning arm body and a positioning disc, the positioning disc being arranged on the end of the positioning arm body away from the fixing base, the geometric center of the surface of the positioning disc away from the fixing base forming the positioning target.

3. The workpiece holding tooling of claim 2, wherein, The positioning arm body comprises a first branch arm and a second branch arm, the end of the first branch arm close to the fixing base being connected to the fixing base, the other end of the first branch arm being connected to one end of the second branch arm, the other end of the second branch arm being connected to the positioning disc, the extending directions of the first branch arm and the second branch arm intersecting.

4. The workpiece holding tooling of claim 3, wherein, The first branch arm and the fixing base are movably connected, and / or The first branch arm and the second branch arm are movably connected.

5. The workpiece holding tooling of claim 1 wherein, The workpiece fixing tool further comprises a jacking device arranged on the fixing base and used for jacking the workpiece, the fixing base having a jacking hole, the top side of the jacking hole being open, at least a part of the jacking device being located in the jacking hole.

6. The workpiece holding tooling of claim 1 wherein, The workpiece fixing tool further comprises a plurality of support mechanisms connected to the fixing base, the support mechanisms extending along the height direction, the ends of the support mechanisms away from the fixing base forming support ends, the support ends being capable of moving relative to the fixing base along the height direction.

7. The workpiece holding tooling of claim 6 wherein, The support mechanism comprises a support rod and a pulley, the support rod extending along the height direction, the pulley being arranged on the top end of the support rod body along the height direction, the pulley being rotatable around a first rotation axis perpendicular to the height direction.

8. The workpiece holding tooling of claim 6, wherein, The fixing base comprises a fixing base body and a plurality of positioning frames, the support mechanism being sleeved on the positioning frame.

9. The workpiece holding tooling of claim 8, wherein, The support mechanism comprises a positioning member, the positioning frame having at least one positioning through hole formed thereon, the support mechanism having at least two positioning grooves formed thereon along the height direction, the support mechanism being sleeved in the positioning frame, the positioning member being inserted into the positioning groove after passing through the positioning through hole.

10. A laser cutting machine characterized by, The workpiece fixing tool comprises any one of claims 1-9.

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