Large workpiece support for shot blasting machine

Abstract

The utility model relates to the technical field of steel structure processing, and discloses a large workpiece bracket for a shot blasting machine. Comprising a first supporting rod and a second supporting rod which are oppositely arranged, a plurality of third supporting rods arranged between the first supporting rod and the second supporting rod, and a discharging piece arranged between the first supporting rod and the second supporting rod. The discharging piece comprises a first discharging unit fixedly arranged at the end of the first supporting rod and the end of the second supporting rod, a second discharging unit and a third discharging unit, wherein the second discharging unit and the third discharging unit are movably arranged between the first supporting rod and the second supporting rod. The first supporting rod is provided with a first moving part used for driving the second discharging unit to move. The shot blasting device has the effect of improving the shot blasting treatment effect of the large workpiece.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel structure processing technical field especially relates to a big work piece support for shot -blasting machine. BACKGROUND

[0002] Shot -blasting machine is the high -speed pellet that utilizes shot -blasting machine to throw or strengthen casting surface's casting equipment, and shot -blasting machine strikes the surface of metal through one or more sand, removes the welding slag, scale and some burrs adhered on the metal casting on the surface of metal, carries out surface cleaning or strengthening to metal work piece, improves the anticorrosive performance of metal work piece surface. Common shot -blasting machine includes shot -blasting chamber and work piece support along the length direction through shot -blasting chamber, and work piece support is used to place the work piece to be processed, and the work piece that is placed is driven from the shot -blasting chamber by work piece support, and the high -speed pellet that is thrown in the shot -blasting chamber is set up shot -blasting machine, and the impurity on the work piece is removed.

[0003] When needing to process big work piece, usually, the work piece is directly placed vertically on the support, but the space occupied by work pieces of different sizes is not same, when the size of work piece is big, the phenomenon that work pieces are stacked together easily occurs, so that the part position of work piece cannot be treated by high -speed pellet, and the processing effect of work piece is affected. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a big work piece support for shot -blasting machine, which has the effect of improving the shot -blasting processing effect of big work piece.

[0005] The above technical purpose of the utility model is realized through the following technical scheme: including oppositely arranged first support rod and second support rod, a plurality of third support rods arranged between the first support rod and the second support rod, and a discharging piece arranged between the first support rod and the second support rod, the discharging piece includes a first discharging unit fixedly arranged at the end of the first support rod and the second support rod, and a second discharging unit and a third discharging unit movably arranged between the first support rod and the second support rod, the first support rod is provided with a first moving piece for driving the second discharging unit to move, and the second support rod is provided with a second moving piece for driving the third discharging unit to move.

[0006] The utility model further provides that: the first discharging unit includes a first discharging plate horizontally arranged between the first support rod and the second support rod, and a first baffle vertically arranged on one side of the first discharging plate, and a second baffle is vertically arranged on the side of the first discharging plate away from the first baffle.

[0007] The further setting of the utility model discloses: the second discharging unit includes the second discharging board that is movably arranged between the first support rod and the second support rod along the horizontal direction and the third baffle that is vertically arranged on the side of the second discharging board close to the second baffle, the side of the second discharging board away from the third baffle is vertically provided with the fourth baffle, the third discharging unit includes the third discharging board that is movably arranged between the first support rod and the second support rod along the horizontal direction and the fifth baffle that is vertically arranged on the side of the third discharging board close to the fourth baffle, the side of the third discharging board away from the fifth baffle is vertically provided with the sixth baffle.

[0008] The further setting of the utility model discloses: the first support rod is horizontally provided with the first moving groove, the first moving piece includes the first screw rod that is rotatably arranged in the first support rod and the first moving block that is cooperatively arranged on the first screw rod, the first screw rod is located in the first moving groove, the side of the first support rod close to the second discharging board is horizontally provided with the second moving groove that is communicated with the first moving groove, the first moving block movably passes through the second moving groove and is fixedly connected with the second discharging board, and the end of the first support rod is provided with the first motor for driving the first screw rod.

[0009] The further setting of the utility model discloses: the second support rod is horizontally provided with the third moving groove, the second moving piece includes the second screw rod that is rotatably arranged in the second support rod and the second moving block that is cooperatively arranged on the second screw rod, the second screw rod is located in the third moving groove, the side of the second support rod close to the third discharging board is horizontally provided with the fourth moving groove that is communicated with the third moving groove, the second moving block movably passes through the fourth moving groove and is fixedly connected with the third discharging board, and the end of the second support rod is provided with the second motor for driving the second screw rod.

[0010] The further setting of the utility model discloses: the side of the second support rod close to the second discharging board is horizontally provided with the fifth moving groove that corresponds to the second moving groove, the third moving block is movably arranged in the third moving groove, one side of the third moving block movably passes through the fifth moving groove and is fixedly connected with the second discharging board, and the second screw rod movably passes through the third moving block.

[0011] The further setting of the utility model discloses: the side of the first support rod close to the third discharging board is horizontally provided with the sixth moving groove that cooperates with the fourth moving groove, the fourth moving block is movably arranged in the first moving groove, one side of the fourth moving block movably passes through the sixth moving groove and is fixedly connected with the third discharging board, and the first screw rod movably passes through the fourth moving block.

[0012] The utility model discloses further provide as: the first support rod is close to the side of second support rod vertical and is provided with the first sheltered groove of intercommunication with second mobile groove, be provided with the first sheltered board of can be engaged in first sheltered groove on first mobile block, the side of second support rod vertical and is provided with the second sheltered groove of intercommunication with fourth mobile groove, be provided with the second sheltered board of can be engaged in second sheltered groove on second mobile block, the side of first support rod vertical and is provided with the third sheltered groove of intercommunication with fifth mobile groove, be provided with the third sheltered board of can be engaged in third sheltered groove on third mobile block, the side of second support rod is provided with the fourth sheltered groove of intercommunication with sixth mobile groove, be provided with the fourth sheltered board of can be engaged in fourth sheltered groove on fourth mobile block.

[0013] The utility model discloses further provide as: the first support rod is far from the side of second support rod vertical and is provided with first limit board, second support rod is far from the side of first limit board vertical and is provided with second limit board.

[0014] The utility model discloses further provide as: the both ends of first support rod are provided with first guide block and second guide block respectively, and the end close to first guide block of second support rod is provided with third guide block with first guide block cooperation, and the end far from third guide block of second support rod is provided with fourth guide block with second guide block cooperation.

[0015] The utility model discloses further provide as: the both ends of first support rod are provided with first guide block and second guide block respectively, and the end close to first guide block of second support rod is provided with third guide block with first guide block cooperation, and the end far from third guide block of second support rod is provided with fourth guide block with second guide block cooperation.

[0016] 1、 through setting up first material discharging unit, second material discharging unit etc., when needing to material discharge to workpiece, first according to the size of workpiece, opens first mobile piece and second mobile piece respectively, drives second material discharging unit and third material discharging unit and moves, so that the distance between first material discharging unit and second material discharging unit and the distance between second material discharging unit and third material discharging unit cooperate with the size of workpiece, so that there is certain interval between the workpiece placed on first material discharging unit, second material discharging unit and third material discharging unit, and overlapping does not occur, when workpiece size is bigger, can move second material discharging unit and third material discharging unit to the end far from first material discharging unit, thereby adjusting the distance between workpiece by reducing the number of workpiece put in, therefore by adjusting the position of second material discharging unit and third material discharging unit, the distance between workpiece placed on workpiece support can be adjusted, avoid the touch overlapping between workpiece, improve the effect of big workpiece's shot blasting.

[0017] 2、By setting the first material plate, the first baffle, etc., when a large workpiece needs to be placed, the bottom end of the workpiece is placed on the first material plate, and then the workpiece is tilted so that the bottom end of the workpiece abuts against the second baffle and one side of the workpiece abuts against the top end of the first baffle, so that the workpiece is placed obliquely upward between the second baffle and the first baffle. Similarly, the workpiece can be placed between the fourth baffle and the third baffle and between the sixth baffle and the fifth baffle. It should be noted that the second baffle, the fourth baffle, and the sixth baffle are relatively low in height, so that when the workpiece passes through the shot blasting machine obliquely upward, the upper side of the workpiece can be treated by the shot blasting machine. Then the workpiece is placed upside down on the workpiece support, so that both sides of the workpiece are treated by the shot blasting machine. Therefore, by setting the first baffle, the second baffle, etc., the workpiece is placed obliquely upward on the first material plate, the second material plate, and the third material plate, and the workpieces do not overlap, thereby improving the shot blasting treatment effect of the large workpiece.

[0018] 3、By setting the first screw, the second screw, etc., when the position of the second material plate needs to be adjusted, the first motor is turned on to drive the first screw to rotate, thereby driving the first moving block to move along the first screw and driving the second material plate to move. Similarly, when the position of the third material plate needs to be adjusted, the second motor is turned on to drive the second screw to rotate, thereby driving the third material plate to move. The structure is simple and the operation is convenient.

[0019] 4、By setting the first shielding groove, the first shielding plate, etc., when the second material plate moves along the first screw, the first shielding plate and the third shielding plate are driven to move along the first shielding groove and the third shielding groove, respectively, so that the second moving groove and the fifth moving groove are always shielded by the first shielding plate and the third shielding plate. Similarly, when the third material plate moves, the second shielding plate and the fourth shielding plate are driven to move along the second shielding groove and the fourth shielding groove, respectively, so that the fourth moving groove and the sixth moving groove are always shielded by the second shielding plate and the fourth shielding plate. Therefore, when the workpiece support passes through the shot blasting machine, the pellets do not enter the inside of the first support rod or the second support rod through the second moving groove, etc., which affects the normal movement of the second material plate or the third material plate, thereby prolonging the service life of the workpiece support. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0021] Figure 1 is a structural schematic view of one embodiment of a large workpiece support for a shot blasting machine according to the present application;

[0022] Figure 2 is a partial cross-sectional structure schematic diagram of one embodiment of the large workpiece support for the shot blasting machine;

[0023] Figure 3 is Figure 2 the enlarged schematic view of A;

[0024] Figure 4 is Figure 2 the enlarged schematic view of B;

[0025] Figure 5 is a partial cross-sectional structure schematic diagram of one embodiment of the large workpiece support for the shot blasting machine;

[0026] Figure 6 is Figure 5 the enlarged schematic view of C;

[0027] Figure 7 is Figure 5 the enlarged schematic view of D.

[0028] In the figure, 1, first support rod; 2, second support rod; 3, third support rod; 4, first discharging unit; 4a, first discharging plate; 4b, first baffle; 5, second discharging unit; 5a, second discharging plate; 5b, third baffle; 6, third discharging unit; 6a, third discharging plate; 6b, fifth baffle; 7, first moving part; 7a, first screw rod; 7b, first moving block; 8, second moving part; 8a, second screw rod; 8b, second moving block; 9, second baffle; 10, fourth baffle; 11, sixth baffle; 12, first moving groove; 13, second moving groove; 14, first motor; 15, third moving groove; 16, fourth moving groove; 17, second motor; 18, fifth moving groove; 19, third moving block; 20, sixth moving groove; 21, fourth moving block; 22, first shielding groove; 23, first shielding plate; 24, second shielding groove; 25, second shielding plate; 26, third shielding groove; 27, third shielding plate; 28, fourth shielding groove; 29, fourth shielding plate; 30, first limiting plate; 31, second limiting plate; 32, first guide block; 33, second guide block; 34, third guide block; 35, fourth guide block. DETAILED DESCRIPTION

[0029] The technical scheme of the utility model will be described clearly and completely in combination with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0030] The utility model provides a kind of large workpiece support for shot blasting machine, such asFigures 1 to 7 As shown, it comprises a first support rod 1 and a second support rod 2 arranged oppositely, a plurality of third support rods 3 arranged between the first support rod 1 and the second support rod 2, and a material discharging piece arranged between the first support rod 1 and the second support rod 2, the material discharging piece comprises a first material discharging unit 4 fixedly arranged at the end of the first support rod 1 and the second support rod 2, and a second material discharging unit 5 and a third material discharging unit 6 movably arranged between the first support rod 1 and the second support rod 2, the first support rod 1 is provided with a first moving piece 7 for driving the second material discharging unit 5 to move, and the second support rod 2 is provided with a second moving piece 8 for driving the third material discharging unit 6 to move.

[0031] The utility model further provides: the first material discharging unit 4 includes the first material discharging plate 4a of horizontal arrangement between the first support rod 1 and the second support rod 2 and the first baffle 4b of vertical arrangement on the side of the first material discharging plate 4a, the first material discharging plate 4a is vertically provided with the second baffle 9 on the side away from the first baffle 4b.

[0032] The utility model further provides: the second material discharging unit 5 includes the second material discharging plate 5a of horizontal movable arrangement between the first support rod 1 and the second support rod 2 and the third baffle 5b of vertical arrangement on the side of the second material discharging plate 5a close to the second baffle 9, the second material discharging plate 5a is vertically provided with the fourth baffle 10 on the side away from the third baffle 5b, the third material discharging unit 6 includes the third material discharging plate 6a of horizontal movable arrangement between the first support rod 1 and the second support rod 2 and the fifth baffle 6b of vertical arrangement on the side of the third material discharging plate 6a close to the fourth baffle 10, the third material discharging plate 6a is vertically provided with the sixth baffle 11 on the side away from the fifth baffle 6b.

[0033] The utility model further provides: the first support rod 1 is horizontally provided with the first moving groove 12, the first moving piece 7 includes the first screw rod 7a of rotation arrangement in the first support rod 1 and the first moving block 7b of cooperation arrangement on the first screw rod 7a, the first screw rod 7a is located in the first moving groove 12, the first support rod 1 is horizontally provided with the second moving groove 13 of intercommunication with the first moving groove 12 on the side close to the second material discharging plate 5a, the first moving block 7b moves through the second moving groove 13 and is fixedly connected with the second material discharging plate 5a, and the end of the first support rod 1 is provided with the first motor 14 for driving the first screw rod 7a.

[0034] The further setting of the utility model is that the third moving groove 15 is horizontally set on the second support rod 2, the second moving piece 8 includes the second screw rod 8a which is rotatably arranged in the second support rod 2 and the second moving block 8b which is cooperatively arranged on the second screw rod 8a, the second screw rod 8a is located in the third moving groove 15, the fourth moving groove 16 which is communicated with the third moving groove 15 is horizontally set on the side of the second support rod 2 close to the third discharging plate 6a, the second moving block 8b is movably arranged through the fourth moving groove 16 and is fixedly connected with the third discharging plate 6a, and the end of the second support rod 2 is provided with the second motor 17 for driving the second screw rod 8a.

[0035] The further setting of the utility model is that the third moving groove 15 is horizontally set on the second support rod 2, the second moving piece 8 includes the second screw rod 8a which is rotatably arranged in the second support rod 2 and the second moving block 8b which is cooperatively arranged on the second screw rod 8a, the second screw rod 8a is located in the third moving groove 15, the fourth moving groove 16 which is communicated with the third moving groove 15 is horizontally set on the side of the second support rod 2 close to the third discharging plate 6a, the second moving block 8b is movably arranged through the fourth moving groove 16 and is fixedly connected with the third discharging plate 6a, and the end of the second support rod 2 is provided with the second motor 17 for driving the second screw rod 8a.

[0036] The further setting of the utility model is that the third moving groove 15 is horizontally set on the second support rod 2, the second moving piece 8 includes the second screw rod 8a which is rotatably arranged in the second support rod 2 and the second moving block 8b which is cooperatively arranged on the second screw rod 8a, the second screw rod 8a is located in the third moving groove 15, the fourth moving groove 16 which is communicated with the third moving groove 15 is horizontally set on the side of the second support rod 2 close to the third discharging plate 6a, the second moving block 8b is movably arranged through the fourth moving groove 16 and is fixedly connected with the third discharging plate 6a, and the end of the second support rod 2 is provided with the second motor 17 for driving the second screw rod 8a.

[0037] The further setting of the utility model is that the third moving groove 15 is horizontally set on the second support rod 2, the second moving piece 8 includes the second screw rod 8a which is rotatably arranged in the second support rod 2 and the second moving block 8b which is cooperatively arranged on the second screw rod 8a, the second screw rod 8a is located in the third moving groove 15, the fourth moving groove 16 which is communicated with the third moving groove 15 is horizontally set on the side of the second support rod 2 close to the third discharging plate 6a, the second moving block 8b is movably arranged through the fourth moving groove 16 and is fixedly connected with the third discharging plate 6a, and the end of the second support rod 2 is provided with the second motor 17 for driving the second screw rod 8a.

[0038] The further setting of the utility model discloses: the first support rod 1 is vertically provided with first limiting plate 30 on the side away from the second support rod 2, and the second support rod 2 is vertically provided with second limiting plate 31 on the side away from the first limiting plate 30.

[0039] The further setting of the utility model discloses: the both ends of the first support rod 1 are provided with first guide block 32 and second guide block 33 respectively, and the one end of the second support rod 2 close to the first guide block 32 is provided with third guide block 34 matched with the first guide block 32, and the one end of the second support rod 2 away from the third guide block 34 is provided with fourth guide block 35 matched with the second guide block 33.

[0040] When the workpiece needs to be discharged, first, according to the size of the workpiece, the first motor 14 and the second motor 17 are opened respectively, the first lead screw 7a and the second lead screw 8a are driven to rotate, thereby respectively driving the second discharge plate 5a and the third discharge plate 6a to move, until the distance between the first discharge unit 4 and the second discharge unit 5 and the distance between the second discharge unit 5 and the third discharge unit 6 are matched with the size of the workpiece, so that there is a certain distance between the workpieces placed on the first discharge unit 4, the second discharge unit 5 and the third discharge unit 6, and overlapping does not occur, when the workpiece size is large, the second discharge unit 5 and the third discharge unit 6 can be moved to the end away from the first discharge unit 4, thereby adjusting the distance between the workpieces by reducing the number of workpieces put in; therefore, by adjusting the positions of the second discharge unit 5 and the third discharge unit 6, the distance between the workpieces placed on the workpiece support can be adjusted, so that the workpieces do not touch and overlap, and the large workpiece shot blasting treatment effect is improved.

[0041] By setting the first discharge plate 4a, the first baffle 4b and the like, when a large workpiece needs to be placed, the bottom end of the workpiece is placed on the first discharge plate 4a, then the workpiece is inclined, so that the bottom end of the workpiece abuts against the second baffle 9, and one side of the workpiece abuts against the top end of the first baffle 4b, thereby making the workpiece be placed obliquely upward between the second baffle 9 and the first baffle 4b, similarly, the workpiece can be placed between the fourth baffle 10 and the third baffle 5b and between the sixth baffle 11 and the fifth baffle 6b, it should be noted that the heights of the second baffle 9, the fourth baffle 10 and the sixth baffle 11 are low, so that when the workpiece passes through the shot blasting machine obliquely upward, the upper side of the workpiece can pass through the treatment of the shot blasting machine, then the workpiece is placed upside down on the workpiece support, thereby making both sides of the workpiece pass through the treatment of the shot blasting machine; therefore, by setting the first baffle 4b, the second baffle 9 and the like, the workpiece is placed obliquely upward on the first discharge plate 4a, the second discharge plate 5a and the third discharge plate 6a, and the workpieces do not overlap, thereby improving the large workpiece shot blasting treatment effect.

[0042] By setting the first screw rod 7a, the second screw rod 8a and the like, when the position of the second feeding plate 5a needs to be adjusted, the first motor 14 is turned on to drive the first screw rod 7a to rotate, which drives the first moving block 7b to move along the first screw rod 7a, and in turn drives the second feeding plate 5a to move. Similarly, when the position of the third feeding plate 6a needs to be adjusted, the second motor 17 is turned on to drive the second screw rod 8a to rotate, which drives the third feeding plate 6a to move. The structure is simple and the operation is convenient.

[0043] By setting the third moving block 19, the fourth moving block 21 and the like, the side of the second feeding plate 5a away from the first moving block 7b is connected together with the second screw rod 8a through the third moving block 19, and similarly, the side of the third feeding plate 6a away from the second moving block 8b is connected together with the first screw rod 7a through the fourth moving block 21, thereby increasing the connection between the second feeding plate 5a and the second support rod 2 and between the third feeding plate 6a and the first support rod 1, improving the load-bearing capacity of the second feeding plate 5a and the third feeding plate 6a, and also improving the stability of the second feeding plate 5a and the third feeding plate 6a during movement.

[0044] By setting the first shielding groove 22, the first shielding plate 23 and the like, when the second feeding plate 5a moves along the first screw rod 7a, the first shielding plate 23 and the third shielding plate 27 are driven to move along the first shielding groove 22 and the third shielding groove 26 respectively, so that the second moving groove 13 and the fifth moving groove 18 are always shielded by the first shielding plate 23 and the third shielding plate 27. Similarly, when the third feeding plate 6a moves, the second shielding plate 25 and the fourth shielding plate 29 are driven to move along the second shielding groove 24 and the fourth shielding groove 28 respectively, so that the fourth moving groove 16 and the sixth moving groove 20 are always shielded by the second shielding plate 25 and the fourth shielding plate 29. Thus, when the workpiece support passes through the shot blasting machine, the pellets do not enter the interior of the first support rod 1 or the second support rod 2 through the second moving groove 13 and the like, which avoids affecting the normal movement of the second feeding plate 5a or the third feeding plate 6a, thereby prolonging the service life of the workpiece support.

[0045] By setting the first limiting plate 30 and the second limiting plate 31, the two sides of the first support rod 1 and the second support rod 2 are limited, thereby limiting the two sides of the workpiece and reducing the risk of lateral dumping of the workpiece during conveying.

[0046] By setting the first guide block 32, the second guide block 33 and the like, the two ends of the first support rod 1 and the second support rod 2 are guided respectively. By setting the first guide block 32 and the like obliquely upward, the workpiece support is prevented from dumping downward during conveying forward through the conveying roller and the like, thereby improving the overall stability of the workpiece support.

[0047] It should be noted that the various embodiments described in the specification are intended to be exemplary only and that the scope of the application is not in any way limited by the embodiments described in the specification. The various embodiments presented in the specification are intended to be novel and non-obvious, and to provide a useful improvement over the prior art.

[0048] The above description is only the preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, improvement, and the like made by those skilled in the art according to the above disclosure shall fall within the protection scope of the claims.

Claims

1. A large workpiece support for a shot blasting machine, characterized in that: The utility model provides a material discharging device, which comprises oppositely arranged first support rods (1) and second support rods (2), a plurality of third support rods (3) arranged between the first support rods (1) and the second support rods (2), and a material discharging piece arranged between the first support rods (1) and the second support rods (2), wherein the material discharging piece comprises first material discharging units (4) fixedly arranged at the ends of the first support rods (1) and the second support rods (2), and second material discharging units (5) and third material discharging units (6) movably arranged between the first support rods (1) and the second support rods (2), the first support rods (1) are provided with first moving pieces (7) for driving the second material discharging units (5) to move, and the second support rods (2) are provided with second moving pieces (8) for driving the third material discharging units (6) to move.

2. The large workpiece support for a shot blasting machine according to claim 1, characterized in that: The first material discharging units (4) comprise first material discharging plates (4a) horizontally arranged between the first support rods (1) and the second support rods (2), and first baffles (4b) vertically arranged on one side of the first material discharging plates (4a), and second baffles (9) are vertically arranged on the side, away from the first baffles (4b), of the first material discharging plates (4a).

3. The large workpiece support for a shot blasting machine according to claim 2, characterized in that: The second material discharging units (5) comprise second material discharging plates (5a) movably arranged in a horizontal direction between the first support rods (1) and the second support rods (2), and third baffles (5b) vertically arranged on the side, close to the second baffles (9), of the second material discharging plates (5a), fourth baffles (10) are vertically arranged on the side, away from the third baffles (5b), of the second material discharging plates (5a), the third material discharging units (6) comprise third material discharging plates (6a) movably arranged in a horizontal direction between the first support rods (1) and the second support rods (2), and fifth baffles (6b) vertically arranged on the side, close to the fourth baffles (10), of the third material discharging plates (6a), and sixth baffles (11) are vertically arranged on the side, away from the fifth baffles (6b), of the third material discharging plates (6a).

4. The large workpiece support for a shot blasting machine according to claim 3, characterized in that: The first support rods (1) are horizontally provided with first moving grooves (12), the first moving pieces (7) comprise first lead screws (7a) rotatably arranged in the first support rods (1) and first moving blocks (7b) movably arranged on the first lead screws (7a), the first lead screws (7a) are located in the first moving grooves (12), the first support rods (1) are horizontally provided, on the side close to the second material discharging plates (5a), with second moving grooves (13) in communication with the first moving grooves (12), the first moving blocks (7b) are movably arranged through the second moving grooves (13) and are fixedly connected with the second material discharging plates (5a), and the ends of the first support rods (1) are provided with first motors (14) for driving the first lead screws (7a).

5. The large workpiece support for a shot blasting machine according to claim 4, characterized in that: The second support rod (2) is horizontally provided with a third moving slot (15), the second moving part (8) comprises a second screw rod (8a) rotatably arranged in the second support rod (2) and a second moving block (8b) arranged on the second screw rod (8a), the second screw rod (8a) is located in the third moving slot (15), the second support rod (2) is horizontally provided with a fourth moving slot (16) communicated with the third moving slot (15) on the side close to the third feeding plate (6a), the second moving block (8b) is movably arranged through the fourth moving slot (16) and is fixedly connected with the third feeding plate (6a), and the end of the second support rod (2) is provided with a second motor (17) for driving the second screw rod (8a).

6. The large workpiece support for a shot blasting machine according to claim 5, characterized in that: The second support rod (2) is horizontally provided with a fifth moving slot (18) corresponding to the second moving slot (13) on the side close to the second feeding plate (5a), the third moving slot (15) is movably provided with a third moving block (19), one side of the third moving block (19) is movably arranged through the fifth moving slot (18) and is fixedly connected with the second feeding plate (5a), and the second screw rod (8a) is movably arranged through the third moving block (19).

7. The large workpiece support for a shot blasting machine according to claim 6, characterized in that: The first support rod (1) is horizontally provided with a sixth moving slot (20) matched with the fourth moving slot (16) on the side close to the third feeding plate (6a), the first moving slot (12) is movably provided with a fourth moving block (21), one side of the fourth moving block (21) is movably arranged through the sixth moving slot (20) and is fixedly connected with the third feeding plate (6a), and the first screw rod (7a) is movably arranged through the fourth moving block (21).

8. The large workpiece support for a shot blasting machine according to claim 7, characterized in that: The first support rod (1) is vertically provided with a first shielding slot (22) communicated with the second moving slot (13) on the side close to the second support rod (2), the first moving block (7b) is provided with a first shielding plate (23) capable of being engaged in the first shielding slot (22), one side of the second support rod (2) is vertically provided with a second shielding slot (24) communicated with the fourth moving slot (16), the second moving block (8b) is provided with a second shielding plate (25) capable of being engaged in the second shielding slot (24), one side of the first support rod (1) is vertically provided with a third shielding slot (26) communicated with the fifth moving slot (18), the third moving block (19) is provided with a third shielding plate (27) capable of being engaged in the third shielding slot (26), and one side of the second support rod (2) is provided with a fourth shielding slot (28) communicated with the sixth moving slot (20), the fourth moving block (21) is provided with a fourth shielding plate (29) capable of being engaged in the fourth shielding slot (28).

9. The large workpiece support for a shot blasting machine according to claim 2, characterized in that: The first support rod (1) is vertically provided with a first limiting plate (30) away from the second support rod (2), and the second support rod (2) is vertically provided with a second limiting plate (31) away from the first limiting plate (30).

10. The large workpiece support for a shot blasting machine according to claim 2, characterized in that: The first support rod (1) is provided with a first guide block (32) and a second guide block (33) respectively at two ends thereof, the second support rod (2) is provided with a third guide block (34) matched with the first guide block (32) at one end close to the first guide block (32), and the second support rod (2) is provided with a fourth guide block (35) matched with the second guide block (33) at one end away from the third guide block (34).

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