A workpiece fixing mechanism for a tube expanding machine

Abstract

The present invention discloses a workpiece fixing mechanism for a tube expanding machine, which comprises a frame. The frame includes a leaning plate, and a workpiece installation area is arranged on the front side of the leaning plate. A second positioning component capable of positioning one side edge of the workpiece is arranged on one side of the workpiece installation area, and a second positioning component capable of positioning the other side edge of the workpiece is arranged on the other side of the workpiece installation area. The first positioning component includes a moving positioning member and a first driving mechanism capable of driving the moving positioning member to move. A concave corner portion is arranged on the moving positioning member. When the moving positioning member moves to the side of the workpiece, one side corner of the workpiece is positioned through the concave corner portion. With such a structure for positioning and installing the workpiece, the stroke of the moving parts is smaller when installing the workpiece, and the time required for loading and unloading the workpiece is greatly reduced, improving the work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of tube expanding machines, and particularly to a workpiece fixing mechanism for a tube expanding machine. Background Art

[0002] The use of a tube expanding machine is to be used for the expansion connection of tubes and tube sheets in the manufacture of equipment such as heat exchangers, condensers, and high-pressure heaters.

[0003] Traditional vertical tube expanding machines are mainly used for processing equipment such as plate-shaped heat exchangers, condensers, and high-pressure heaters. The structure for installing workpieces thereon is as follows: including a fixed base, a fixed rear plate, a movable front plate, and a plurality of side strips spacedly arranged on the front side of the fixed rear plate. One side edge of the movable front plate is hinged to one side edge of the movable front plate. The process of installing a workpiece is as follows: First, the workpiece is vertically placed on the fixed base, and the bottom edge of the workpiece is positioned through the positioning structure of the fixed base. At this time, the rear side of the workpiece is close to the fixed rear plate, and the left and right sides of each workpiece are located between two side strips. Then, the movable front plate is rotated. After rotating in place, the other side of the movable front plate and the other side of the fixed rear plate are connected, and thus the workpiece can be installed between the movable front plate and the fixed rear plate. Such a structure has the following problems. Since the volume of the movable front plate is large and the stroke of rotating the movable front plate is large, the next operation can only be carried out when it rotates in place, resulting in a long time for loading and unloading workpieces and low work efficiency. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a workpiece fixing mechanism applied to a tube expanding machine and capable of quickly installing and disassembling workpieces.

[0005] The technical solution adopted by the present invention to solve its technical problems is:

[0006] A workpiece fixing mechanism for a tube expanding machine, which includes a frame. The frame includes a leaning plate. A workpiece installation area is provided on the front side of the leaning plate. A first positioning component capable of positioning one edge portion of the workpiece is provided on one side of the workpiece installation area. A second positioning component capable of positioning the other edge portion of the workpiece is provided on the other side of the workpiece installation area. The second positioning component includes a limit seat capable of positioning one side of the workpiece, a swinging member capable of swinging and pressing against the edge portion of the front side of the workpiece, and a second driving mechanism capable of driving the swinging member to swing.

[0007] As a preferred solution of this workpiece fixing mechanism, the frame further includes a base located below the leaning plate and capable of placing the workpiece.

[0008] As a preferred embodiment of the workpiece fixing mechanism, the second positioning assembly further includes a mounting base, the limiting seat is arranged on the mounting base, the swinging member is hinged to the limiting seat, and the second driving mechanism includes a driver arranged on the mounting base and a transmission mechanism connected between the driver and the swinging member.

[0009] As a preferred embodiment of the workpiece fixing mechanism, the driver is a cylinder, the transmission mechanism includes a moving seat connected to the output end of the cylinder, the swinging member is provided with an inclined groove, the moving seat is provided with a push rod, and the push rod is inserted into the inclined groove to drive the swinging member to swing when the moving seat moves back and forth.

[0010] As a preferred embodiment of the workpiece fixing mechanism, the push rod is pivotally connected to the moving seat so that the push rod rolls with the inner side wall of the inclined groove.

[0011] As a preferred embodiment of the workpiece fixing mechanism, the mounting base is movably arranged on the leaning plate, and a locking device capable of locking the mounting base at multiple positions on the leaning plate is further arranged between the leaning plate and the mounting base.

[0012] As a preferred embodiment of the workpiece fixing mechanism, the leaning plate is provided with guide posts, the mounting base is sleeved on the guide posts and can move back and forth along the guide posts, and the locking device includes: a plurality of first positioning holes arranged at intervals along the front-back direction on the guide posts, a second positioning hole arranged on the mounting base, and a pin capable of passing through the second positioning hole and inserting into the first positioning hole.

[0013] As a preferred embodiment of the workpiece fixing mechanism, the first positioning assembly includes a moving positioning member and a first driving mechanism capable of driving the moving positioning member to move. A concave corner portion is arranged on the moving positioning member, and when the moving positioning member moves to the side of the workpiece, one side corner of the workpiece is positioned through the concave corner portion.

[0014] As a preferred embodiment of the workpiece fixing mechanism, the moving positioning member is L-shaped, and the concave portion of the moving positioning member forms the concave corner portion.

[0015] As a preferred embodiment of the workpiece fixing mechanism, the first driving mechanism includes a first cylinder arranged on the leaning plate, the output end of the first cylinder is connected with a left-right translation seat, and the moving positioning member is detachably mounted on the left-right translation seat.

[0016] As a preferred embodiment of the workpiece fixing mechanism, in the second positioning assembly, the number of swing members and limit seats is two each. The two limit seats are arranged on the mounting base, one on the left and one on the right. Each swing member is hinged to the front end of a limit seat. The air cylinder drives the two swing members to swing synchronously through a transmission mechanism. The number of workpiece mounting areas and the first positioning assembly is two each, and the number of the second positioning assembly is one. The two workpiece mounting areas are arranged on the front side of the leaning plate, one on the left and one on the right. The second positioning assembly is arranged between the two workpiece mounting areas, and the two first positioning assemblies are respectively arranged outside the two workpiece mounting areas.

[0017] The beneficial effects of the present invention are as follows: When installing a workpiece in the present invention, first place the workpiece on the base so that the rear side of the workpiece leans against the workpiece mounting area of the leaning plate. At this time, the leaning plate limits the rear side of the workpiece. Then, the first air cylinder pushes the moving positioning member close to the workpiece, and positions one side corner of the workpiece through the concave corner portion thereon. When the workpiece is pushed by the moving positioning member until it abuts against the limit seat, the swing member swings in place and presses the other side of the workpiece, thereby realizing the positioning of the other side corner of the workpiece. Compared with the prior art, in the present invention, the sizes of the moving parts such as the swing member and the moving positioning member are smaller, and the strokes of these moving parts are also smaller when installing the workpiece. Therefore, the time required for loading and unloading the workpiece is significantly reduced, and the working efficiency is remarkably improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a top view of a working condition of the present invention;

[0019] Figure 2 is a top view of a working condition of Embodiment 1 of the first positioning assembly;

[0020] Figure 3 is a perspective view of a working condition of the present invention;

[0021] Figure 4 is a perspective view of the main part of the present invention;

[0022] Figure 5 is a perspective view of a working condition of Embodiment 2 of the second positioning assembly;

[0023] Figure 6 is a top view of a working condition of Embodiment 2 of the second positioning assembly;

[0024] Figure 7 is a top view of another working condition of Embodiment 2 of the second positioning assembly;

[0025] Figure 8 A perspective view of another working condition of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0027] Referring to Figures 1 to 8 , the present invention provides a workpiece fixing mechanism for a tube expanding machine, which includes a frame 1. The frame 1 includes a base 11 capable of placing a workpiece 2, a leaning plate 12 located above the base 11, a column 13 located behind the base 11, and a connecting plate 14 connecting the column 13 and the leaning plate 12. A workpiece installation area 121 is provided on the front side of the leaning plate 12. A first positioning component capable of positioning one side edge of the workpiece 2 is provided on one side of the workpiece installation area 121, and a second positioning component 4 capable of positioning the other side edge of the workpiece 2 is provided on the other side of the workpiece installation area 121.

[0028] Referring to Figure 4 , the first driving mechanism includes a first cylinder 61 provided on the leaning plate 12. The output end of the first cylinder 61 is connected with a left - right translation seat 62. The moving positioning member 31 is detachably mounted on the left - right translation seat 62. The first cylinder 61 drives the moving positioning member 31 to move left and right to position or release one side corner of the workpiece 2. The moving positioning member 31 and the left - right translation seat 62 are preferably connected by a threaded connection. The effect of such a design is that when the workpiece 2 is replaced and the thickness of the workpiece 2 changes, the L - shaped moving positioning member 31 can be replaced to adapt to the thickness change of the workpiece 2.

[0029] As a preferred solution of the present invention, the second positioning component 4 includes a limit seat 41 capable of positioning one side of the workpiece 2, a swing member 42 capable of swinging and pressing against the edge of the front side of the workpiece 2, and a second driving mechanism capable of driving the swing member 42 to swing.

[0030] Furthermore, the second positioning component 4 further includes a mounting seat 43. The limit seat 41 is provided on the mounting seat 43. The swing member 42 is hinged to the limit seat 41. The second driving mechanism includes a driver 44 provided on the mounting seat 43 and a transmission mechanism connected between the driver 44 and the swing member 42.

[0031] Optionally, the driver 44 is a cylinder. The transmission mechanism includes a moving seat 45 connected to the output end of the cylinder. An inclined slot 421 is provided on the swing member 42, and a push rod 46 is provided on the moving seat 45. The push rod 46 is inserted into the inclined slot 421 so that when the moving seat 45 moves back and forth, it drives the swing member 42 to swing.

[0032] The inclined slot 421 can be a slot with both ends closed, or an open slot with one end open and one end closed. Preferably, the inclined slot 421 is an open slot with one end open and one end closed. Such a design facilitates the insertion of the push rod 46 into the inclined slot 421.

[0033] Further, the ejector rod 46 is pivotally connected to the moving seat 45 so that the ejector rod 46 is in rolling engagement with the inner side wall of the inclined groove 421. For example, the ejector rod 46 is pivotally connected to the moving seat 45 through a pin shaft. Such a design can reduce the friction between the ejector rod 46 and the inclined groove 421, reduce wear, and improve the smoothness of transmission.

[0034] In some embodiments of the present invention, the transmission mechanism can also adopt other structures. For example, the driver 44 is a servo motor, and the transmission mechanism is a gear transmission mechanism connected between the output end of the motor and the inner swing plate.

[0035] Refer to Figure 4 , as a further improvement of the present invention, the mounting seat 43 is movably arranged on the leaning plate 12 in the front-back direction, and a locking device capable of locking the mounting seat 43 at multiple positions on the leaning plate 12 is further provided between the leaning plate 12 and the mounting seat 43. Generally, the locking device is in a locked state, and the mounting seat 43 cannot move. When the type of the workpiece 2 is changed, resulting in a change in the thickness of the workpiece 2, the locking device can be unlocked, and then the mounting seat 43 is moved back and forth to adjust the length of the inner limiting plate extending out of the leaning plate 12, thereby adapting to the thickness of the workpiece 2. Such a design improves the adaptability of the present invention to the thickness of the workpiece 2.

[0036] Optionally, a guiding column 122 is provided on the leaning plate 12, and the mounting seat 43 is sleeved on the guiding column 122 through a guiding hole 432 and can move back and forth along the guiding column 122. The locking device includes: a plurality of first positioning holes 123 arranged at intervals on the guiding column 122 in the front-back direction, a second positioning hole 431 provided on the mounting seat 43, and a pin 5 capable of passing through the second positioning hole 431 and inserting into the first positioning hole 123. Of course, screws and threaded holes can also be used instead of the above-mentioned pin 5 and positioning holes.

[0037] Refer to Figure 1 , the first positioning assembly includes a moving positioning member 31 and a first driving mechanism capable of driving the moving positioning member 31 to move. A concave corner portion 311 is provided on the moving positioning member 31. When the moving positioning member 31 moves to the side of the workpiece 2, the concave corner portion 311 positions one side corner of the workpiece 2. Preferably, the moving positioning member 31 is L-shaped, and the concave corner portion 311 is formed at the concave portion of the moving positioning member 31.

[0038] In other embodiments of the present invention, the above-mentioned first positioning assembly can also adopt a structure similar to that of the second positioning assembly, that is, one side corner of the workpiece 2 is positioned by the swing of a limiting seat and a swing member.

[0039] The working principle of the present invention is as follows: First, the workpiece 2 is placed on the base 11, and the rear side of the workpiece 2 leans against the workpiece mounting area 121 of the leaning plate 12. At this time, the leaning plate 12 limits the rear side of the workpiece 2. Then, the first cylinder 61 pushes the moving positioning member 31 close to the workpiece 2, and positions one side corner of the workpiece 2 through the concave corner portion 311 thereon. When the workpiece 2 is pushed by the moving positioning member 31 until it abuts against the limit seat 41, the swinging member 42 swings in place and presses the other side of the workpiece 2, thereby realizing the positioning of the other side corner of the workpiece 2. Compared with the prior art, in the present invention, the sizes of the moving components such as the swinging member 42 and the moving positioning member 31 are smaller, and the strokes of these moving components during the installation of the workpiece 2 are also smaller. Therefore, the time required for loading and unloading the workpiece 2 is significantly reduced, and the working efficiency is remarkably improved.

[0040] Referring to Figure 3 In Figure 8 , in a preferred embodiment of the present invention, the number of the workpiece mounting areas 121 and the first positioning components are both two, and the number of the second positioning components 4 is one. The two workpiece mounting areas 121 are arranged on the front side of the leaning plate 12, one on the left and the other on the right. The second positioning component 4 is arranged between the two workpiece mounting areas 121. The two first positioning components are respectively arranged outside the two workpiece mounting areas 121. The number of the swinging members 42 and the limit seats 41 are both two. The two limit seats 41 are arranged on the mounting seat 43, one on the left and the other on the right. Each swinging member 42 is hinged to the front end of a limit seat 41. The cylinder drives the two swinging members 42 to swing synchronously through a transmission mechanism. Such a design enables the present invention to simultaneously position and install two workpieces 2, further improving the working efficiency. By analogy, the workpiece mounting areas 121 can also be set to be multiple. A first positioning component is respectively arranged on the outer sides of the two outermost workpiece mounting areas 121, and a second positioning component 4 is arranged in the area between every two workpiece mounting areas 121 to realize the simultaneous positioning and installation of multiple workpieces.

[0041] In this solution, in order to adapt to the thickness change of the workpiece 2, the same method of making the mounting seat 43 adjustable back and forth is also adopted, that is: the mounting seat 43 is movably arranged back and forth on the leaning plate 12, and a locking device capable of locking the mounting seat 43 at multiple positions on the leaning plate 12 is also arranged between the leaning plate 12 and the mounting seat 43. Referring to Figure 8 , another advantage of such a design is: This solution can also be applicable to the installation of a wider workpiece 2. The method is: move the second positioning component 4 to a position behind the front side of the leaning plate 12, and position and install the wider workpiece 2 through the two first positioning components.

[0042] The above is only the preferred implementation mode of the present invention. As long as the technical solutions that achieve the purpose of the present invention by basically the same means fall within the protection scope of the present invention.

Claims

1. A workpiece fixing mechanism of a tube expanding machine, characterized in that It includes a frame (1), and the frame (1) includes a leaning plate (12). A workpiece mounting area (121) is provided on the front side of the leaning plate (12). A first positioning component capable of positioning one edge portion of the workpiece (2) is provided on one side of the workpiece mounting area (121). A second positioning component (4) capable of positioning the other edge portion of the workpiece (2) is provided on the other side of the workpiece mounting area (121). The second positioning component (4) includes a limit seat (41) capable of positioning one side of the workpiece (2), a swing member (42) capable of swinging and pressing against the edge portion of the front side of the workpiece (2), and a second driving mechanism capable of driving the swing member (42) to swing. The first positioning component includes a moving positioning member (31) and a first driving mechanism capable of driving the moving positioning member (31) to move. The first driving mechanism includes a first air cylinder (61) provided on the leaning plate (12). The output end of the first air cylinder (61) is connected to a left-right translation seat (62). The moving positioning member (31) is detachably mounted on the left-right translation seat (62). The first air cylinder (61) is used to drive the moving positioning member (31) to move left and right to position or release one corner portion of the workpiece (2). The second positioning component (4) further includes a mounting seat (43). The limit seat (41) is provided on the mounting seat (43). The swing member (42) is hinged to the limit seat (41). The second driving mechanism includes a driver (44) provided on the mounting seat (43) and a transmission mechanism connected between the driver (44) and the swing member (42). The driver (44) is an air cylinder. The transmission mechanism includes a moving seat (45) connected to the output end of the air cylinder. A slant groove (421) is provided on the swing member (42). A push rod (46) is provided on the moving seat (45). The push rod (46) is inserted into the slant groove (421) so that when the moving seat (45) moves back and forth, it drives the swing member (42) to swing. In the second positioning component, the number of the swing members (42) and the limit seats (41) is two each. The two limit seats (41) are arranged on the left and right sides of the An mounting seat (43). Each swing member (42) is hinged to the front end of a limit seat (41). The cylinder drives the two swing members (42) to swing synchronously through the transmission mechanism. The number of the workpiece mounting areas (121) and the first positioning components is two each. The number of the second positioning components (4) is one. The two workpiece mounting areas (121) are arranged on the front side of the leaning plate (12) on the left and right sides. The second positioning component (4) is arranged between the two workpiece mounting areas (121). The two first positioning components are respectively arranged on the outer sides of the two workpiece mounting areas (121).

2. The workpiece fixing mechanism of a tube expanding machine according to claim 1, wherein, The frame (1) further includes a base (11) located below the leaning plate (12) and capable of placing the workpiece (2).

3. The workpiece fixing mechanism of an expansion tube machine according to claim 1, characterized in that, The push rod (46) is pivotally connected to the moving seat (45) so that the push rod (46) rolls on the inner side wall of the slant groove (421).

4. The workpiece fixing mechanism of a tube expanding machine according to claim 1, characterized in that, The mounting seat (43) is movably arranged on the leaning plate (12). A locking device capable of locking the mounting seat (43) at multiple positions on the leaning plate (12) is further provided between the leaning plate (12) and the mounting seat (43).

5. The workpiece fixing mechanism of an expansion tube machine according to claim 4, characterized in that, A guiding post (122) is provided on the leaning board (12). The mounting seat (43) is sleeved on the guiding post (122) and can move back and forth along the guiding post (122). The locking device includes: a plurality of first positioning holes (123) arranged at intervals along the front-back direction on the guiding post (122), a second positioning hole (431) provided on the mounting seat (43), and a bolt (5) that can pass through the second positioning hole (431) and insert into the first positioning hole (123).

6. The workpiece fixing mechanism of an expansion tube machine according to claim 1, characterized in that, A concave corner portion (311) is provided on the moving positioning member (31). When the moving positioning member (31) moves to the side of the workpiece (2), one side corner of the workpiece (2) is positioned through the concave corner portion (311).

7. The workpiece fixing mechanism of an expansion tube machine according to claim 6, characterized in that, The moving positioning member (31) is L-shaped, and the concave portion of the moving positioning member (31) forms the concave corner portion (311).

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