CN213828563U

CN213828563U - Stainless steel shot rounding machine convenient for replacement of guard plate

Info

Publication number: CN213828563U
Application number: CN202022785740.4U
Authority: CN
Inventors: 张涛; 赵志浩; 刘书玺; 赵思忠; 刘务科
Original assignee: Shandong Longkuang Metal Products Co ltd
Current assignee: Shandong Longkuang Metal Products Co ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-07-30
Anticipated expiration: 2030-11-26

Abstract

The utility model relates to a stainless steel shot rounding machine convenient to change backplate belongs to the field of throwing ball equipment, and it includes the supporting mechanism of fixed connection in the treatment chamber inner wall, and supporting mechanism is located and trickles the board top in vertical direction, and supporting mechanism deviates from and trickles board one side horizontal sliding connection and has the backplate, and the backplate is located between two impeller heads in the horizontal direction, and backplate both sides face is respectively towards an impeller head, it has the locking mechanical system who fixes the backplate at the treatment chamber lateral wall to follow backplate sliding direction sliding connection in the backplate. This application has the convenient backplate of changing, reduces workman working strength's effect.

Description

Stainless steel shot rounding machine convenient for replacement of guard plate

Technical Field

The application relates to the field of shot blasting equipment, in particular to a stainless steel shot rounding machine convenient for replacement of a protection plate.

Background

The stainless steel shots are also called stainless steel shots, stainless steel round-polished steel wire cut shots, stainless steel shot blasting and stainless steel wire cut shots, and are mainly used for surface shot blasting, sand blasting, shot blasting treatment, shot blasting forming, finishing, strengthening, matte, correction, paint removal and corrosion removal of stainless steel parts, aluminum alloy die castings and copper alloy parts. The production method of the stainless steel shots can be divided into two types, the first type of currently accepted production method is to obtain cast stainless steel shots through smelting, atomizing and cooling, and the second type of production method is to obtain the stainless steel shots through cutting and rounding stainless steel wires, cut stainless steel wire shots through rounding, and shot blasting the stainless steel.

The Chinese utility model patent with the publication number of CN209125635U discloses a steel shot rounding shot blasting machine, which comprises a shot blasting machine body and a hoisting machine; the shot blasting machine comprises a shot blasting machine body, and is characterized in that a treatment cavity is arranged in the shot blasting machine body, an opening is formed in the side wall of the treatment cavity, a sealing plate used for sealing the opening is rotatably connected to the shot blasting machine body, a protective plate is arranged inside the treatment cavity, a shot blasting device fixedly connected to the shot blasting machine body faces the protective plate, a dropping plate is further arranged below the protective plate, a lifting machine is located on one side of the shot blasting machine body, a steel shot storage hopper is arranged at the top of the lifting machine, and the steel shot storage hopper is of a sharp-nose type.

Stainless steel shots are placed into the treatment cavity through the opening, the stainless steel shots are conveyed to the impeller head by the elevator, the stainless steel shots are thrown onto the protective plate through the impeller head, edges and corners of the stainless steel shots collide with the protective plate to become blunt, the stainless steel shots reach the bottom of the treatment cavity through the flowing plate, and then the stainless steel shots are transferred into the shot storage hopper through the elevator. If the steel shots are not rounded, transferring the steel shots to an impeller head, and performing reciprocating circulation to round the steel shots; and if the steel shots are ground to be round, discharging the steel shots from the steel shot storage hopper.

In the related art, the protective plate is damaged by collision with the steel shot and needs to be replaced, and in the related art, the protective plate is usually fixed on the inner wall of the treatment cavity by welding, so that the protective plate is inconvenient to replace.

SUMMERY OF THE UTILITY MODEL

For convenient change backplate, reduce workman working strength, the application provides a stainless steel shot rounding machine convenient to change backplate.

The application provides a stainless steel shot rounding machine convenient to change backplate adopts following technical scheme:

the utility model provides a stainless steel shot rounding machine convenient to change backplate, includes fixed connection in the supporting mechanism of treatment chamber inner wall, and supporting mechanism is located and trickles the board top in vertical direction, supporting mechanism deviates from and trickles board one side horizontal sliding connection and has the backplate, and the backplate is located between two impeller heads in the horizontal direction, backplate both sides face is respectively towards an impeller head, there is the locking mechanical system who fixes the backplate at the treatment chamber lateral wall along backplate sliding connection in the backplate.

Through adopting above-mentioned technical scheme, when needing to be changed the backplate, open earlier after the shrouding through locking mechanical system with backplate and treatment chamber separation, then can accomplish the dismantlement with the backplate roll-off, the new backplate that will be equipped with locking mechanical system during the installation slides in the treatment chamber, and supporting mechanism supports new backplate, and locking mechanical system locks new backplate, dismantles simple to operate, reduces workman intensity of labour.

Optionally, the lateral wall of the treatment chamber where the opening is located is a front lateral wall, the lateral walls of the treatment chamber where the two impeller heads are located are a left lateral wall and a right lateral wall respectively, the lateral wall of the treatment chamber opposite to the lateral wall where the opening is located is a rear lateral wall, the lateral wall of the treatment chamber located at the top in the vertical direction is a top wall, the guard plate abuts against one end of the rear lateral wall and the rear lateral wall, the guard plate abuts against one end of the top wall and the top wall, and the guard plate deviates from one end of the rear lateral wall and abuts against the sealing plate.

Through adopting above-mentioned technical scheme, the backplate separates the treatment chamber, increases shot collision area to improve shot rounding efficiency.

Optionally, the two impact plates are fixedly connected to the two side faces of the protective plate facing the shot blasting machine at intervals in the vertical direction, an inclined face is formed in one side, away from the protective plate, of each impact plate, the inclined face is inclined towards the direction close to the protective plate and is close to one side of the other impact plate, and the projection of the shot blasting machine on one side, facing the shot blasting machine, of the protective plate is located between the two impact plates in the vertical direction.

Through adopting above-mentioned technical scheme, set up through the slope with the striking plate and make the shot when bumping with the steel sheet, reduced the probability of shot bounce, be convenient for turn into the kinetic energy of shot and make the broken potential energy of shot, improved the broken efficiency and the effect of shot.

Optionally, a positioning block is fixedly connected to the rear side wall, a groove is formed in one end, facing the positioning block, of the guard plate, and the positioning block is connected in the groove in a sliding mode along the length direction of the first guide rod.

Through adopting above-mentioned technical scheme, the locating piece plays location and supporting role to the backplate after sliding into the recess, increases the stability of being connected of backplate and treatment chamber lateral wall.

Optionally, the locking mechanism includes a rectangular parallelepiped locking plate slidably connected in the guard plate, a length direction of the locking plate is parallel to a length direction of the first guide rod, a locking assembly for fixing the locking plate and the positioning block is disposed at one end of the locking plate facing the positioning block, and the locking assembly is slidably connected in the positioning block.

Through adopting above-mentioned technical scheme, the lockplate slides and promotes the locking subassembly and slide in the locating piece, and the locking subassembly is fixed lockplate and locating piece to fix the backplate in the current position, effectively strengthen the connection stability of backplate in the treatment chamber.

Optionally, the locking assembly includes a positioning plate fixedly connected to one end of the locking plate in the length direction, a driving rod is rotatably connected in the locking plate in the length direction of the locking plate, the length rotation axis of the driving rod is parallel to the length direction of the first guide rod, a worm is coaxially and fixedly connected to one end of the driving rod facing the positioning plate, the worm is rotatably connected in the positioning plate, a worm wheel is rotatably connected in the positioning plate, the worm wheel is engaged with the worm, a gear is rotatably connected in the positioning plate, the gear and the worm wheel are coaxially and fixedly connected through a connecting rod, two racks are vertically slidably connected in the positioning plate in a synchronous and reverse direction, both racks are engaged with the gear and are staggered in the horizontal direction, one end of the rack slides out of the positioning plate and slides into the positioning plate, both sides of the locking plate are fixedly connected with limiting blocks, and a limiting groove is formed in the guard plate in the sliding direction of the locking plate, the limiting block is connected in the limiting groove in a sliding mode, one end, close to the positioning block, of the limiting groove is not opened, and when the rack slides into the positioning block, the limiting block abuts against one end, not opened, of the limiting groove.

Through adopting above-mentioned technical scheme, rotate the actuating lever and drive the worm and rotate, worm drive worm wheel rotates, and the worm wheel passes through the connecting rod and drives gear revolve, and two racks of gear drive roll-off are from the locating plate in and slide in the locating plate to fixed the locating plate, stopper, locating piece, lockplate and locating plate are fixed the backplate in the current position, effectively reduce because of the backplate slides to reinforced influence.

Optionally, the supporting mechanism comprises a plurality of i-beams fixedly connected in the treatment cavity, one end of each i-beam is fixedly connected with the left side wall, and the other end of each i-beam is fixedly connected with the right side wall.

By adopting the technical scheme, the steel shots enter the bottom of the treatment cavity through the gap between the adjacent I-shaped steel and are lifted by the lifter for reciprocating treatment, and the I-shaped steel plays a role in supporting the guard plate.

Optionally, the upper surface of the i-beam is fixedly connected with two third guide rods along the length direction of the i-beam, the two third guide rods are arranged at intervals, the upper surface of each third guide rod is provided with a guide surface, the guide surfaces are arranged in an inclined manner, and the guide surfaces are inclined towards the direction of the i-beam along two sides of the length direction of the third guide rods.

Through adopting above-mentioned technical scheme, the slope of third guide bar upper surface sets up and reduces the shot of keeping somewhere in the I-steel upper surface, improves and throws the ball effect.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the guard plate needs to be replaced, the guard plate is separated from the treatment cavity through the locking mechanism after the sealing plate is opened, then the guard plate slides out, so that the disassembly can be completed, a new guard plate provided with the locking mechanism slides into the treatment cavity during the installation, the supporting mechanism supports the new guard plate, the locking mechanism locks the new guard plate, the disassembly and the installation are convenient, and the labor intensity of workers is reduced;

2. the guard plate is fixed at the current position by the limiting block, the positioning block, the locking plate and the positioning plate, so that the influence on feeding due to the sliding of the guard plate is effectively reduced;

3. the steel shots enter the bottom of the treatment cavity through the gap between the adjacent I-shaped steels and are lifted by the lifter for reciprocating treatment, and the I-shaped steels support the guard plate.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic view of a part of the structure of the embodiment of the present application, which is mainly used for showing the guard plate;

FIG. 3 is a schematic cross-sectional view of a portion of the structure of the embodiment of the present application, which is mainly used for showing a stop lever;

FIG. 4 is a schematic view, partly in section, of an embodiment of the present application, and mainly used to show a locking mechanism;

FIG. 5 is a schematic view, partly in section, of an embodiment of the present application, and is primarily intended to show a locking mechanism;

FIG. 6 is an enlarged, fragmentary view of portion A of FIG. 5, shown primarily for the purpose of illustrating the locking assembly;

fig. 7 is a partial structural schematic diagram of the embodiment of the present application, which is mainly used for showing the connection relationship between the worm wheel and the gear.

Description of reference numerals: 12. a left side wall; 13. a right side wall; 14. a rear sidewall; 15. a top wall; 16. an opening; 17. positioning blocks; 18. a fourth chute; 19. positioning a groove; 2. a support mechanism; 21. i-shaped steel; 22. a first guide bar; 23. a second guide bar; 24. a third guide bar; 3. a shot blasting machine; 4. a guard plate; 41. an impact plate; 42. a first chute; 43. a second chute; 44. a groove; 45. a third chute; 46. a limiting groove; 5. a locking mechanism; 51. a locking plate; 511. accommodating grooves; 512. a limiting block; 52. a locking assembly; 521. positioning a plate; 522. a worm; 523. a worm gear; 524. a connecting rod; 525. a gear; 526. a rack; 527. a fifth chute; 528. a drive rod; 529. rotating the block; 6. closing the plate; 61. a limiting rod; 7. and (7) dropping a plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses stainless steel shot rounding machine convenient to change backplate.

Referring to fig. 1 and 2, the stainless steel shot rounding machine convenient for replacement of the protective plate comprises a supporting mechanism 2 arranged on the inner wall of a treatment cavity, the supporting mechanism 2 is located above a flowing plate 7 in the vertical direction, one side, deviating from the flowing plate 7, of the supporting mechanism 2 is detachably connected with the protective plate 4, the protective plate 4 is located between two impeller heads 3 in the horizontal direction, two side faces of the protective plate 4 face towards one impeller head 3 respectively, and a locking mechanism 5 used for fixing the protective plate 4 and the side wall of the treatment cavity is arranged on the protective plate 4.

Backplate 4 can be dismantled and connect on supporting mechanism 2, conveniently changes backplate 4, when needing to add the stainless steel shot in the treatment chamber, through locking mechanical system 5 with backplate 4 locking on the treatment chamber lateral wall, improve backplate 4 connection stability in the treatment chamber, effectively reduce because of backplate 4 slides to reinforced influence.

Referring to fig. 2, the sidewall of the processing chamber where the opening 16 is located is a front sidewall, the sidewalls of the processing chamber where the two blasting devices 3 are located are a left sidewall 12 and a right sidewall 13, respectively, the sidewall of the processing chamber opposite to the sidewall where the opening 16 is located is a rear sidewall 14, and the sidewall of the processing chamber located uppermost in the vertical direction is a top wall 15.

Referring to fig. 3, one end of the protection plate 4 facing the rear side wall 14 abuts against the rear side wall 14, one end of the protection plate 4 facing the top wall 15 abuts against the top wall 15, and one end of the protection plate 4 facing away from the rear side wall 14 abuts against the sealing plate 6.

Referring to fig. 2, two impact plates 41 are fixedly connected to two side faces of the protection plate 4 facing the impeller head 3, the two impact plates 41 are arranged in the vertical direction at intervals, an inclined surface is formed on one side, deviating from the protection plate 4, of the impact plate 41, and the inclined surface is inclined towards the direction close to the protection plate 4 on the side close to the other impact plate 41. The projection of the impeller 3 on the side of the shield plate 4 facing the impeller 3 is located between two impact plates 41 in the vertical direction.

The impact plate 41 is obliquely arranged, so that when the steel shot collides with the steel plate, the probability of bounce of the steel shot is reduced, the kinetic energy of the steel shot is conveniently converted into potential energy for crushing the steel shot, and the efficiency and the effect of crushing the steel shot are improved.

Referring to fig. 2, the supporting mechanism 2 includes five h-beams 21 fixedly connected in the processing chamber, one end of each h-beam 21 is fixedly connected to the left sidewall 12, and the other end is fixedly connected to the right sidewall 13. The upper surface of the I-beam 21 is fixedly connected with a first guide rod 22, the length direction of the first guide rod 22 is perpendicular to the length direction of the I-beam 21, one end, facing the I-beam 21, of the protection plate 4 is provided with a first sliding groove 42, the length direction of the first sliding groove 42 is perpendicular to the length direction of the I-beam 21, the first guide rod 22 is connected in the first sliding groove 42 in a sliding mode, and one end, facing the I-beam 21, of the protection plate 4 abuts against the upper surface of the I-beam 21.

The first guide rod 22 guides the guard plate 4, so that the guard plate 4 slides more stably, the I-shaped steel 21 supports the guard plate 4, and the I-shaped steel 21 and the first guide rod 22 position the guard plate 4 in the treatment cavity. The steel shots enter the bottom of the treatment cavity through the gap between the adjacent I-shaped steel 21 and are lifted by the lifter for reciprocating treatment.

Referring to fig. 3, two third guide rods 24 are fixedly connected to the upper surface of the i-beam 21 along the length direction of the i-beam 21, the two third guide rods 24 are arranged at intervals, guide surfaces are arranged on the upper surface of the third guide rods 24 and are inclined, and the guide surfaces are inclined towards the direction close to the i-beam 21 along two sides of the length direction of the third guide rods 24. One end of the third guide rod 24 facing the impact plate 41 is abutted against the impact plate 41, and one end of the third guide rod 24 far away from the impact plate 41 is fixedly connected with the side wall of the treatment chamber. The inclined arrangement of the upper surface of the third guide rod 24 reduces the steel shots left on the upper surface of the I-steel 21, and improves the shot blasting effect.

Referring to fig. 2, the top wall 15 is fixedly connected with a second guide rod 23 along the length direction of the first guide rod 22, a second sliding groove 43 is formed in one end, facing the top wall 15, of the protection plate 4, the length direction of the second sliding groove 43 is parallel to the length direction of the first sliding groove 42, and the second guide rod 23 is slidably connected in the second sliding groove 43.

Referring to fig. 3, a positioning block 17 is fixedly connected to the rear side wall 14, a groove 44 is formed in one end of the guard plate 4 facing the positioning block 17, and the positioning block 17 is slidably connected in the groove 44 along the length direction of the first guide rod 22. The positioning block 17 slides into the groove 44 to position and support the guard plate 4, so that the connection stability of the guard plate 4 and the side wall of the treatment cavity is improved.

Referring to fig. 4, the locking mechanism 5 includes a rectangular parallelepiped locking plate 51 slidably connected in the protection plate 4, a length direction of the locking plate 51 is parallel to a length direction of the first guide rod 22, a third sliding groove 45 is formed in the protection plate 4 along the length direction of the first guide rod 22, a fourth sliding groove 18 is formed in the positioning block 17 along the length direction of the first guide rod 22, the third sliding groove 45 is communicated with the fourth sliding groove 18, the locking plate 51 is slidably connected in the third sliding groove 45, a locking assembly 52 for fixing the locking plate 51 and the positioning block 17 is disposed at one end of the locking plate 51 facing the positioning block 17, and the locking assembly 52 is slidably connected in the third sliding groove 45 and the fourth sliding groove 18.

Referring to fig. 5 and 6, the locking assembly 52 includes a positioning plate 521 fixedly coupled to one end of the locking plate 51 in the length direction, and the positioning plate 521 is slidably coupled to the fourth slide slot 18 through the third slide slot 45. A worm 522 is rotatably connected to the positioning plate 521, the axis of the worm 522 is parallel to the length direction of the fourth sliding chute 18, a worm wheel 523 is rotatably connected to the positioning plate 521, and the worm wheel 523 is meshed with the worm 522.

Referring to fig. 6 and 7, a gear 525 is rotatably connected in the positioning plate 521, and the gear 525 and the worm gear 523 are coaxially and fixedly connected through a connecting rod 524. Two fifth chutes 527 are vertically formed in the positioning plate 521, a rack 526 is vertically slidably connected to the fifth chute 527, the two racks 526 are engaged with the gear 525 and are staggered in the horizontal direction, a positioning groove 19 is formed in the side wall of the fourth chute 18, and one end of the rack 526 penetrates through the fifth chute 527 and slides into the positioning groove 19.

Referring to fig. 4 and 5, a driving rod 528 is rotatably connected in the locking plate 51 along the length direction of the locking plate 51, the driving rod 528 is coaxially and fixedly connected with the worm 522, a rotating block 529 is fixedly connected to one end of the driving rod 528, which is away from the worm 522, an accommodating groove 511 is formed in one end of the locking plate 51, which is away from the positioning plate 521, and the rotating block 529 is located in the accommodating groove 511.

Referring to fig. 6, the two sides of the locking plate 51 are fixedly connected with limiting blocks 512, the side wall of the third sliding groove 45 is provided with limiting grooves 46, the limiting blocks 512 are slidably connected in the limiting grooves 46, and one ends of the limiting grooves 46, which are close to the positioning blocks 17, are not opened. When the rack 526 slides into the positioning groove 19, the limiting block 512 abuts against the non-opened end of the limiting groove 46.

Referring to fig. 3, shrouding 6 towards 4 one side fixedly connected with gag lever post 61 of backplate, gag lever post 61 is the semicylinder pole, and the vertical setting of gag lever post 61 axis, when 6 butts of shrouding in backplate 4, gag lever post 61 joint in third spout 45, gag lever post 61 butt deviates from lockplate 51 one end in backplate 4.

The implementation principle of the stainless steel wire shot cutting and rounding machine convenient for replacing the guard plate 4 in the embodiment of the application is as follows: when the cover plate 4 is replaced, the closing plate 6 is rotated to expose the opening 16. The driving rod 528 drives the worm 522 to rotate so as to drive the worm wheel 523 to rotate, the worm wheel 523 drives the two racks 526 to slide reversely through the gear 525, the racks 526 slide out of the fifth sliding slot 527 and slide into the locking plate 51, and the slide protection plate 4 drives the locking mechanism 5 to slide out of the treatment cavity.

The locking mechanism 5 is slid out of the third sliding groove 45 and then placed into the third sliding groove 45 of the new guard plate 4. A new shield 4 with the locking mechanism 5 installed is slid into the treatment chamber. The first guide bar 22 slides into the first slide slot 42 and the second guide bar 23 slides into the second slide slot 43. The guard plate 4 continues to slide and abut against the rear side wall 14, and the positioning block 17 slides into the groove 44. The locking plate 51 is pushed to slide, so that the positioning plate 521 slides into the fourth sliding groove 18, the driving rod 528 is rotated, the driving rod 528 drives the worm 522 to rotate, so that the worm gear 523 is driven to rotate, the worm gear 523 drives the two racks 526 to reversely slide through the gear 525, the racks 526 slide out of the locking plate 51 and slide into the positioning groove 19, the sealing plate 6 is closed, and the limiting rod 61 enters the third sliding groove 45 and abuts against the locking plate 51.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a stainless steel shot rounding machine convenient to change backplate which characterized in that: including supporting mechanism (2) fixed connection in the treatment chamber inner wall, supporting mechanism (2) are located and flow board (7) top in vertical direction, supporting mechanism (2) deviate from and flow board (7) one side horizontal sliding connection and have backplate (4), and backplate (4) are located between two impeller heads (3) in the horizontal direction, backplate (4) both sides face respectively towards one impeller head (3).

2. The stainless steel shot rounding machine convenient for replacement of the guard plate as claimed in claim 1, wherein: the lateral wall of the treatment cavity at which the opening (16) is located is a front lateral wall, the lateral wall of the treatment cavity at which the two impeller heads (3) are located is a left lateral wall (12) and a right lateral wall (13) respectively, the lateral wall of the treatment cavity opposite to the lateral wall at which the opening (16) is located is a rear lateral wall (14), the treatment cavity is located on the uppermost lateral wall in the vertical direction and is a top wall (15), the guard plate (4) abuts against one end of the rear lateral wall (14) and the rear lateral wall (14), the guard plate (4) abuts against one end of the top wall (15) and the top wall (15), and the guard plate (4) deviates from one end of the rear lateral wall (14) and abuts against the sealing plate (6).

3. The stainless steel shot rounding machine convenient for replacement of the guard plate as claimed in claim 2, wherein: the utility model discloses a shot-blasting machine, including backplate (4), two striking plates (41) of the equal fixedly connected with of both sides face of shot-blasting machine (3), two striking plates (41) interval sets up in vertical direction, the inclined plane has been seted up to one side that striking plate (41) deviate from backplate (4), and the inclined plane is close to another striking plate (41) one side and to being close to backplate (4) direction slope setting, and shot-blasting machine (3) are located between two striking plates (41) in vertical direction at backplate (4) projection on one side of shot-blasting machine (3).

4. The stainless steel shot rounding machine convenient for replacement of the guard plate as claimed in claim 3, wherein: the rear side wall (14) is fixedly connected with a positioning block (17), one end, facing the positioning block (17), of the guard plate (4) is provided with a groove (44), and the positioning block (17) is connected in the groove (44) in a sliding mode along the length direction of the first guide rod (22).

5. The stainless steel shot rounding machine convenient for replacement of the guard plate as claimed in claim 4, wherein: along backplate (4) direction of sliding connection have in backplate (4) and fix locking mechanical system (5) at the treatment chamber lateral wall with backplate (4), locking mechanical system (5) are including sliding connection in backplate (4) rectangular solid lockplate (51), lockplate (51) length direction is parallel with first guide bar (22) length direction, lockplate (51) are provided with lockplate (51) and fixed locking Assembly (52) of locating piece (17) towards locating piece (17) one end, locking Assembly (52) sliding connection is in locating piece (17).

6. The stainless steel shot rounding machine convenient for replacement of the guard plate as claimed in claim 5, wherein: the locking assembly (52) comprises a positioning plate (521) fixedly connected to one end of the length direction of the locking plate (51), a driving rod (528) is rotatably connected to the inside of the locking plate (51) along the length direction of the locking plate (51), the length rotating axis of the driving rod (528) is parallel to the length direction of the first guide rod (22), the driving rod (528) faces to one end of the positioning plate (521), a worm (522) is coaxially and fixedly connected to the inside of the positioning plate (521), a worm wheel (523) is rotatably connected to the inside of the positioning plate (521), the worm wheel (523) is meshed with the worm (522), a gear (525) is rotatably connected to the inside of the positioning plate (521), the gear (525) is coaxially and fixedly connected with the worm wheel (523) through a connecting rod (524), and two racks (526) are synchronously and vertically connected to the inside of the positioning plate (521) in a reverse sliding mode, two racks (526) all mesh with gear (525) and set up in the staggered way in the horizontal direction, rack (526) one end is followed in locating plate (521) roll-off and is slided into locating piece (17), lockplate (51) both sides equal fixedly connected with stopper (512), spacing groove (46) have been seted up along lockplate (51) glide direction in backplate (4), stopper (512) sliding connection is in spacing groove (46), and spacing groove (46) are close to locating piece (17) one end and have not been opened, and when rack (526) slided into locating piece (17), stopper (512) butt has not been opened one end in spacing groove (46).

7. The stainless steel shot rounding machine convenient for replacement of the guard plate as claimed in claim 6, wherein: the supporting mechanism (2) comprises a plurality of I-shaped steels (21) fixedly connected in the treatment cavity, one ends of the I-shaped steels (21) are fixedly connected with the left side wall (12), and the other ends of the I-shaped steels (21) are fixedly connected with the right side wall (13).

8. The stainless steel shot rounding machine convenient for replacement of the guard plate as claimed in claim 7, wherein: the upper surface of the I-shaped steel (21) is fixedly connected with two third guide rods (24) along the length direction of the I-shaped steel (21), the two third guide rods (24) are arranged at intervals, guide surfaces are arranged on the upper surface of the third guide rods (24) and are inclined, and the guide surfaces are inclined along the two side directions of the length direction of the third guide rods (24) and are close to the direction of the I-shaped steel (21).