A single-station workpiece fixing mechanism for a tube expander

Abstract

The present invention discloses a single-station workpiece fixing mechanism of a tube expander, which includes a frame, the frame includes a leaning plate, the front side of the leaning plate has a workpiece installation area, and the left and right sides of the workpiece installation area are respectively provided with positioning components, the positioning components include: a movable pressure block, a driving device capable of driving the movable pressure block to move between a working position and a non-working position, and a limiting seat capable of limiting the side of the workpiece, when the movable pressure block moves to the working position, it is closely attached to or close to the front side of the workpiece, when the movable pressure block moves to the non-working position, the movable pressure block is separated from the workpiece and the distance between the two movable pressure blocks on different sides is greater than the left and right width of the workpiece. The positioning components on both sides of the leaning plate and the workpiece installation area are used to position and install the workpiece, the travel of the movable pressure block is small, the time required for loading and unloading the workpiece is greatly reduced, and the work efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tube expanders, in particular to a single-station workpiece fixing mechanism of a tube expander. Background Art

[0002] The purpose of the tube expander is to expand and connect tubes and tube sheets in the manufacture of equipment such as heat exchangers, condensers, and high-pressure heaters.

[0003] The traditional vertical tube expander is mainly used for processing plate-shaped heat exchangers, condensers, high-pressure heaters and other equipment. The structure used to install the workpiece is as follows: it includes a fixed base, a fixed rear plate, a movable front plate and a plurality of side strips arranged at intervals on the front side of the fixed rear plate. One side edge of the movable front plate is hinged with one side edge of the movable front plate. The process of installing the workpiece is: first, the workpiece is placed vertically on the fixed base, and the bottom edge of the workpiece is positioned by 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 the two side strips. Then the movable front plate is rotated, and the other side of the movable front plate is connected to the other side of the fixed rear plate after it is rotated into place, so that the workpiece can be installed between the movable front plate and the fixed rear plate. Such a structure has the following problems: due to the large volume of the movable front plate and the large stroke of rotating the movable front plate, the next step can be performed only when it is rotated into place, and when switching workpieces of different widths and thicknesses, the previous positioning fixtures need to be replaced, and the installation accuracy needs to be adjusted, resulting in a long time for loading and unloading workpieces and low work efficiency. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a single-station workpiece fixing mechanism for use in a tube expander and capable of realizing rapid installation and removal of workpieces.

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

[0006] A single-station workpiece fixing mechanism of a tube expanding machine comprises a frame, the frame comprises a leaning plate, the front side surface of the leaning plate has a workpiece mounting area, and positioning components are respectively arranged on the left and right sides of the workpiece mounting area, and the positioning components comprise: a movable pressure block, a driving device capable of driving the movable pressure block to move between a working position and a non-working position, and a limiting seat capable of limiting the side of the workpiece, the movable pressure block is tightly or close to the front side surface of the workpiece when it moves to the working position, and the movable pressure block is separated from the workpiece when it moves to the non-working position, and the distance between the two movable pressure blocks on different sides is greater than the left and right width of the workpiece.

[0007] Preferably, the frame further comprises a base located below the leaning plate and capable of placing a workpiece.

[0008] Preferably, the limit seat can be movably arranged on the leaning board left and right, the movable pressure block and the driving device are both installed on the limit seat, and a locking device capable of locking the limit seat at multiple positions on the leaning board is also arranged between the limit seat and the leaning board.

[0009] Preferably, the movable pressing block is movably arranged on the leaning plate or the limiting seat through an inclined guiding mechanism.

[0010] Preferably, a guide seat is arranged on the limit seat, the guide mechanism comprises an inclined guide hole arranged on the guide seat, a guide rod is arranged through the inclined guide hole, and the movable pressure block is connected to the front end of the guide rod.

[0011] Preferably, a limiting protrusion capable of abutting against the movable pressing block when the movable pressing block moves to the working position is provided on the front side surface of the limiting seat.

[0012] Preferably, the limiting protrusion is detachably mounted on the front side of the limiter.

[0013] Preferably, all or part of the driving device protrudes from the rear side of the leaning board, and the frame further comprises a column arranged behind the base and a connecting plate connected between the column and the leaning board, and the connecting plate is provided with an avoidance groove for the driving device to pass through.

[0014] Preferably, the locking device comprises: a plurality of first pin holes arranged on the leaning plate at intervals along the left-right direction, a second pin hole arranged on the limit seat, and a pin capable of passing through the second pin hole and being inserted into the first pin hole.

[0015] The beneficial effects of the present invention are as follows: the working principle of the present invention is: first, place the workpiece on the base so that the rear side of the workpiece leans against the workpiece installation area of ​​the leaning plate. At this time, the leaning plate limits the rear side of the workpiece, and the limit seats on the left and right sides limit the left and right sides of the workpiece; then, the driving device drives the movable pressure blocks on both sides to move to the working position, so that the movable pressure block on the left and the workpiece are attached to the left part of the front side of the workpiece, and the movable pressure block on the right and the workpiece are attached to the right part of the front side of the workpiece, so that the front side of the workpiece can be limited and the installation of the workpiece is completed. Compared with the prior art, the size of the two movable pressure blocks is smaller, and the travel from the working position to the non-working position is also smaller, so the time required for loading and unloading the workpiece is greatly reduced, which significantly improves the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view of the first working condition of the main part of the present invention;

[0017] Figure 2 It is a top view of the second working condition of the main part of the present invention;

[0018] Figure 3 is a stereogram of the third working condition of the present invention;

[0019] Figure 4 yes Figure 3 A magnified view of part A;

[0020] Figure 5 It is a stereogram of the positioning assembly. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings.

[0022] Reference Figures 1 to 5 The present invention proposes a single-station workpiece fixing mechanism of 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 connected between the column 13 and the leaning plate 12, the front side surface of the leaning plate 12 has a workpiece installation area 121, and the left and right sides of the workpiece installation area 121 are respectively provided with positioning components, the positioning components include: a movable pressing block 3, a driving device 4 capable of driving the movable pressing block 3 to move between a working position and a non-working position, and a limiting seat 5 capable of limiting the side of the workpiece 2, when the movable pressing block 3 moves to the working position, it is tightly attached to or close to the front side surface of the workpiece 2, when the movable pressing block 3 moves to the non-working position, the movable pressing block 3 is separated from the workpiece 2 and the distance between the two movable pressing blocks 3 on different sides is greater than the left and right widths of the workpiece 2.

[0023] The working principle of the present invention is: first, place the workpiece 2 on the base 11, so that the rear side of the workpiece 2 leans against the workpiece installation area 121 of the leaning plate 12, at this time, the leaning plate 12 limits the rear side of the workpiece 2, and the limit seats 5 on the left and right sides limit the left and right sides of the workpiece 2; then, the driving device 4 drives the movable pressing blocks 3 on both sides to move to the working position, so that the movable pressing block 3 on the left and the workpiece 2 are attached to the left part of the front side of the workpiece 2, and the movable pressing block 3 on the right and the workpiece 2 are attached to the right part of the front side of the workpiece 2, so that the front side of the workpiece 2 can be limited and the installation of the workpiece 2 is completed. Compared with the prior art, the size of the two movable pressing blocks 3 is smaller, and the travel from the working position to the non-working position is also smaller, so the time required for loading and unloading the workpiece 2 is greatly reduced, which significantly improves the work efficiency.

[0024] In the present invention, the movable pressing block 3 is movably arranged on the leaning plate 12 or the limit seat 5 through an inclined guide mechanism. Taking the positioning assembly on the left side as an example, the working position of the movable pressing block 3 is located at the right rear of the non-working position. When the workpiece 2 is installed, the movable pressing block 3 moves from the non-working position at the left front to the working position at the right rear along the guide mechanism. When the workpiece 2 is removed, the movable pressing block 3 moves from the working position at the right rear to the non-working position at the left front; the positioning assembly on the right side is symmetrical to the positioning assembly on the left side.

[0025] Taking the positioning assembly on the left side as an example, when the movable pressing block 3 is in the non-working position, the entire movable pressing block 3 should be located on the left side of the right side surface of the corresponding limit seat 5, and the positioning assembly on the right side is symmetrical with the positioning assembly on the left side. In this way, it can be ensured that when the movable pressing block 3 is in the non-working position, the distance between the two movable pressing blocks 3 on different sides is greater than the left-right width of the workpiece 2. This allows the workpiece 2 to be loaded into the workpiece installation area 121 from front to back.

[0026] In one solution of the present invention, a guide seat 51 is provided on the limit seat 5, and the guide mechanism includes an inclined guide hole 53 provided on the guide seat 51, a guide rod 52 is provided through the inclined guide hole 53, and the movable pressing block 3 is connected to the front end of the guide rod 52. Of course, in some solutions of the present invention, the positions of the guide seat 51 and the guide rod 52 can be interchanged, and a guide rail or the like can be used to replace the guide rod 52.

[0027] Reference Figure 1 The front side of the limit seat 5 is provided with a limit convex block 54 which can abut against the movable pressing block 3 when the movable pressing block 3 moves to the working position. Before the expansion operation is completed, the surface rigidity of the workpiece 2 is relatively small and it is easy to be deformed by pressure. The limit convex block 54 is used to limit the working position of the movable pressing block 3, so as to prevent the movable pressing block 3 from crushing the workpiece 2.

[0028] Furthermore, the limiting protrusion 54 is detachably mounted on the front side of the limiting device, preferably connected by screws. By replacing the limiting protrusions 54 of different thicknesses to adapt to the thickness change of the workpiece 2, the present invention can be adapted to the positioning and installation of workpieces 2 of different thicknesses.

[0029] Furthermore, in order to make the present invention adaptable to positioning and installing workpieces 2 of different widths, the limit seat 5 is movably arranged on the backing plate 12, the movable pressing block 3 and the driving device 4 are both installed on the limit seat 5, and a locking device capable of locking the limit seat 5 at multiple positions on the backing plate 12 is also arranged between the limit seat 5 and the backing plate 12. Generally, the locking device is in a locked state, and the limit seat 5 is fixed. When the type of the workpiece 2 is changed, resulting in a change in the width of the workpiece 2, the first locking device can be unlocked, and then the first movable seat is moved left and right, and after being adjusted into place, the first movable seat is locked by the first locking device, thereby adapting to the width of the workpiece 2.

[0030] Preferably, the locking device comprises: a plurality of first pin holes 120 arranged at intervals along the left-right direction on the backrest plate 12, a second pin hole 56 arranged on the limit seat 5, and a pin (not shown) that can pass through the second pin hole 56 and be inserted into the first pin hole 120. Of course, the first locking device can also be replaced by a detachable fastener such as a screw or a bolt.

[0031] Reference Figure 4 The driving device 4 is a cylinder installed on the limit seat 5, and all or part of the cylinder protrudes from the rear side of the leaning plate 12. In order to avoid the cylinder colliding with the connecting plate 14 when the limit seat 5 moves left and right, an avoidance groove 141 is provided on the connecting plate 14 for the cylinder to pass through.

Claims

1. A single-station workpiece fixing mechanism for a tube expander, characterized in that: The machine frame (1) comprises a support plate (12), the front side of the support plate (12) having a workpiece mounting area (121), the left and right sides of the workpiece mounting area (121) being respectively provided with positioning components, the positioning components comprising: a movable pressing block (3), a driving device (4) capable of driving the movable pressing block (3) to move between a working position and a non-working position, and a limiting seat (5) capable of limiting the side of the workpiece (2), the movable pressing block (3) being in close contact with or close to the front side of the workpiece (2) when the movable pressing block (3) moves to the working position, and the movable pressing block (3) is separated from the workpiece (2) when the movable pressing block (3) moves to the non-working position, and the distance between the two movable pressing blocks (3) on different sides is greater than the left and right width of the workpiece (2); The movable pressing block (3) is movably arranged on the leaning plate (12) or the limiting seat (5) through an inclined guiding mechanism; A limiting protrusion (54) is provided on the front side surface of the limiting seat (5) and is capable of abutting against the movable pressing block (3) when the movable pressing block (3) moves to the working position. The limiting protrusion (54) is detachably mounted on the front side surface of the limiting seat (5); The frame (1) further comprises a base (11) located below the leaning plate (12) and capable of placing a workpiece (2).

2. A single-station workpiece fixing mechanism for a tube expander according to claim 1, characterized in that: The limit seat (5) is movably arranged on the backrest plate (12) to the left and right, the movable pressure block (3) and the driving device (4) are both installed on the limit seat (5), and a locking device capable of locking the limit seat (5) at multiple positions on the backrest plate (12) is also arranged between the limit seat (5) and the backrest plate (12).

3. The single-station workpiece fixing mechanism of a tube expander according to claim 1, characterized in that: A guide seat (51) is arranged on the limit seat (5), the guide mechanism comprises an inclined guide hole (53) arranged on the guide seat (51), a guide rod (52) is arranged through the inclined guide hole (53), and the movable pressing block (3) is connected to the front end of the guide rod (52).

4. A single-station workpiece fixing mechanism for a tube expander according to claim 2, characterized in that: The driving device (4) entirely or partially protrudes from the rear side of the backrest plate (12); the frame (1) further comprises a column (13) arranged behind the base (11) and a connecting plate (14) connected between the column (13) and the backrest plate (12); the connecting plate (14) is provided with an avoidance groove (141) through which the driving device (4) can pass.

5. The single-station workpiece fixing mechanism of a tube expander according to claim 2, characterized in that: The locking device comprises: a plurality of first pin holes (120) arranged at intervals along the left-right direction on the leaning plate (12), a second pin hole (56) arranged on the limit seat (5), and a pin capable of passing through the second pin hole (56) and being inserted into the first pin hole (120).

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