Automatic sand blasting machine for heat exchange production

Abstract

The invention relates to the technical field of sand blasting machines, and provides an automatic sand blasting machine for heat exchange production, the automatic sand blasting machine comprises a sand blasting machine box and a sand blasting machine, the front side of the sand blasting machine box is provided with an intermittent feeding mechanism, and half of a machine body of the intermittent feeding mechanism stretches into the sand blasting machine box. By means of the design of the automatic sand blasting machine, efficient feeding and precise sand blasting of the heat exchanger can be achieved. The continuity and the stability of the production line are guaranteed through automatic feeding, and the uniformity and the quality of sand blasting are guaranteed through 360-degree all-dimensional sand blasting coverage. Due to the design of the automatic sand blasting machine, remarkable efficiency improvement and quality guarantee are brought to heat exchange production, productivity improvement of enterprises is facilitated, labor cost is reduced, and consistency of product quality is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of sandblasting machines, in particular to an automatic sandblasting machine for heat exchange production. Background Art

[0002] Sandblasting machine is a commonly used surface treatment equipment, used to clean and remove dirt, oxide layer or coating on the metal surface. It impacts the surface of the workpiece by high-speed jetting abrasive or other media to achieve the purpose of cleaning, removing impurities, increasing surface roughness, etc. In the existing heat exchanger production process, although the sandblasting machine has a certain role, it also has some shortcomings.

[0003] First, traditional sandblasting technology may not meet the accuracy and efficiency requirements for heat exchanger surface treatment. For example, for some complex heat exchanger components, traditional sandblasting machines often have difficulty in fully covering all areas that need to be treated, resulting in uneven treatment effects or omissions.

[0004] In addition, traditional sandblasting machines also have certain deficiencies in energy utilization and production efficiency. They usually require a large amount of compressed air or electricity to drive the sandblasting process, which increases both energy consumption and production costs. Moreover, the operation of traditional sandblasting machines may take a long time and cannot meet the requirements of modern production for speed and efficiency.

[0005] Therefore, this invention proposes a kind of automatic sandblasting machine for heat exchange production to solve the above problems. Summary of the invention

[0006] In order to overcome the defects of the prior art, the object of the present invention is to provide an automatic sandblasting machine for heat exchange production.

[0007] To achieve the above object, the technical solution of the present invention is implemented as follows: an automatic sandblasting machine for heat exchange production, comprising a sandblasting machine box and a sandblasting machine, wherein an intermittent feeding mechanism with half of the machine body inserted into the interior thereof is installed on the front side of the sandblasting machine box; The intermittent feeding mechanism specifically includes the following structure: a cylindrical base that serves as an external support structure; A rotary table rotatably connected to the upper port of the cylindrical base; An intermittent driving mechanism disposed inside the cylindrical base for driving the rotary table to perform intermittent rotation; Heat exchanger positioning fixtures installed on the top of the rotary table at four positions: front, back, left, and right; The positioning fixture rotation drive mechanism distributed inside the sandblasting machine box and driving the internal drive end of the intermittent drive mechanism is used to drive the heat exchanger positioning fixture rotated to the innermost side of the sandblasting machine box to perform 360° rotation to cooperate with the sandblasting operation.

[0008] Preferably, the heat exchanger positioning tool specifically includes the following structure: A cylindrical positioning platform installed on the top surface of the rotary table and capable of rotating freely; Mounting slots distributed on the top of the positioning platform; A heat exchanger clamping and positioning assembly installed inside the mounting slot.

[0009] Preferably, the heat exchanger clamping and positioning assembly specifically includes the following structure: A dual-axis reduction motor installed at the center of the installation slot; Drive screws respectively connected to the output ends on both sides of the dual-axis reduction motor; A screw rod sleeve correspondingly threadedly sleeved on the driving screw rods on both sides; A positioning clamp is correspondingly fixedly installed on the top tube wall of the screw rod sleeve on both sides.

[0010] Preferably, the intermittent drive mechanism specifically includes the following structure: A driving motor installed at the bottom of the cylindrical base; A drive shaft connected to the output end of the drive motor, wherein the drive shaft serves as a power input component of the rotation drive mechanism of the positioning fixture, and then transmits power to the heat exchanger positioning fixture rotated to the sandblasting station, thereby driving the rotation drive operation of the heat exchanger positioning fixture at the sandblasting station; A driving disc mounted on the top of the driving shaft; A driving boss installed near the edge of the top of the driving rotary disc; A rotary table drive shaft connected to the center of the bottom of the rotary table; An intermittent transmission member connected to the bottom end of the rotary table drive shaft and transmitting the motion of the drive boss; A support shaft installed at the bottom center of the cylindrical base and supported at the bottom center of the intermittent transmission member; A damping disc is installed on the top surface of the driving rotary disc and cooperates with the intermittent transmission member to limit the intermittent transmission member from rotating to a specific angle and then continuously rotating.

[0011] Preferably, the intermittent transmission member is specifically configured as a four-pointed star, and each edge of the intermittent transmission member is configured as an arc shape that is adapted and fitted to the outer edge of the damping disc; Each corner end of the intermittent transmission member is provided with a transmission guide groove extending toward the center position, and the internal groove shape of the transmission guide groove is adapted to the lead-in and lead-out operations of the driving boss.

[0012] Preferably, the positioning tool rotation drive mechanism specifically includes the following structure: A transmission shaft distributed outside the cylindrical base and behind the sandblasting station; A positioning tooling rotating drive disk installed at the top end of the transmission shaft, wherein the front edge of the positioning tooling rotating drive disk just fits the edge of the heat exchanger clamping positioning tooling at the sandblasting station to achieve fitting rotation transmission operation; A synchronous transmission belt is sleeved between the transmission shaft and the drive shaft.

[0013] Preferably, the edge of the positioning tool rotation drive disk is set to be made of fluororubber material to enhance the friction force of the fitting rotation drive.

[0014] Preferably, the sandblasting machine is installed at the center of the back wall of the sandblasting machine box. The sandblasting machine is provided with a plurality of sandblasting nozzles which are all aimed at the workstations waiting for the sandblasting operation inside the intermittent feeding mechanism.

[0015] Preferably, the front side of the sandblasting machine box is provided with two left-right symmetrical passage openings for the heat exchanger positioning tooling to rotate into and out of.

[0016] The beneficial effects of the present invention are embodied in: Automatic feeding: Efficient intermittent feeding: The intermittent feeding mechanism realizes intermittent feeding of the heat exchanger through the cooperation of the intermittent transmission parts and the rotary table. Driven by the drive motor, the rotary table can intermittently rotate at a specific angle to send the heat exchanger positioning tooling into the sandblasting machine box. This intermittent feeding method ensures the accuracy and stability of the feeding and improves the efficiency of the entire sandblasting process.

[0017] Automatic clamping and positioning: The heat exchanger clamping and positioning assembly can automatically adjust the distance of the clamping and positioning plates through the cooperation of the drive screw and the screw sleeve to achieve accurate clamping and positioning of heat exchangers of different sizes. This automatic clamping and positioning ensures the stability of the heat exchanger during sandblasting operations, reduces manual intervention, and improves production efficiency.

[0018] Sand blasting uniformity: All-round coverage: The positioning fixture rotation drive mechanism can drive the heat exchanger positioning fixture to rotate 360° through the synchronous transmission belt and the positioning fixture rotation drive disk. In this way, the sandblasting machine can perform all-round sandblasting operations on the heat exchanger, ensuring that the sandblasting evenly covers every corner of the heat exchanger.

[0019] Precise control: The design of intermittent transmission parts and damping discs ensures that the intermittent rotation of the rotary table can stop at a specific angle. This precise control not only ensures the accurate positioning of the heat exchanger at the sandblasting station, but also avoids excessive rotation or positioning errors, further improving the uniformity of sandblasting.

[0020] The design of the automatic sandblasting machine mentioned above can achieve efficient feeding and precise sandblasting of heat exchangers. Automatic feeding ensures the continuity and stability of the production line, while 360° all-round sandblasting coverage ensures the uniformity and quality of sandblasting. The design of this automatic sandblasting machine has brought significant efficiency improvement and quality assurance to heat exchange production, helping enterprises to improve productivity, reduce labor costs, and ensure the consistency of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In the attached picture: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a half-cut structure schematic diagram of the present invention; Figure 3 It is a structural schematic diagram of the heat exchanger positioning tool of the present invention; Figure 4 It is a structural schematic diagram of the intermittent drive mechanism of the present invention; Figure 5 It is a structural schematic diagram of a heat exchanger clamping and positioning assembly of the present invention; Figure 6 It is a schematic structural diagram of the intermittent transmission member of the present invention; Description of reference numerals: 1. Sandblasting machine box; 2. Sandblasting machine; 3. Intermittent feeding mechanism; 11. Passageway entrance; 31. Cylindrical base; 32. Rotary table; 33. Heat exchanger positioning fixture; 34. Intermittent drive mechanism; 35. Positioning fixture rotation drive mechanism; 331, positioning platform; 332, heat exchanger clamping and positioning assembly; 333, mounting groove; 3321, double-axis reduction motor; 3322, driving screw; 3323, screw sleeve; 3324, positioning splint; 341, driving motor; 342, driving shaft; 343, driving turntable; 344, damping disc; 345, driving boss; 346, intermittent transmission member; 347, turntable driving shaft; 348, supporting shaft; 351, synchronous transmission belt; 352, transmission shaft; 353, positioning tool rotation drive disk; 3461, transmission guide groove. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the invention.

[0023] It should be noted that if the embodiments of the invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, "multiple" means more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection required by the invention.

[0025] Please refer to the instruction manual Figure 1-Figure 6 The present invention provides an automatic sandblasting machine for heat exchange production, comprising a sandblasting machine box 1 and a sandblasting machine 2, wherein an intermittent feeding mechanism 3 with half of the machine body inserted into the interior thereof is installed on the front side of the sandblasting machine box 1; The intermittent feeding mechanism 3 specifically includes the following structure: A cylindrical base 31 as an external support structure; A rotary table 32 rotatably connected to the upper end of the cylindrical base 31; An intermittent driving mechanism 34 disposed inside the cylindrical base 31 and used to drive the rotary table 32 to intermittently rotate; Heat exchanger positioning fixtures 33 installed on the top of the rotary table 32 at four positions: front, back, left, and right; The positioning fixture rotating drive mechanism 35 distributed inside the sandblasting machine box 1 and transmitting to the internal driving end of the intermittent driving mechanism 34 is used to drive the heat exchanger positioning fixture 33 to rotate to the innermost side of the sandblasting machine box 1 to perform a 360° rotation to cooperate with the sandblasting operation, ensuring that the sandblasting covers every corner of the heat exchanger, thereby improving the uniformity and efficiency of the sandblasting.

[0026] The heat exchanger positioning tool 33 specifically includes the following structure: A cylindrical positioning platform 331 installed on the top surface of the rotating platform 32 and capable of rotating freely; A mounting groove 333 distributed on the top of the positioning platform 331; A heat exchanger clamping and positioning assembly 332 installed inside the installation groove 333; The heat exchanger clamping and positioning assembly 332 is specifically used to position the heat exchanger placed above to ensure its stability during the sandblasting operation.

[0027] The heat exchanger clamping and positioning assembly 332 specifically includes the following structure: A dual-axis reduction motor 3321 installed at the center of the installation slot 333; The driving screw rods 3322 are respectively connected to the output ends of both sides of the dual-axis reduction motor 3321; The screw rod sleeves 3323 are correspondingly threadedly sleeved on the driving screw rods 3322 on both sides; A positioning clamping plate 3324 fixedly mounted on the top tube wall of the screw sleeve 3323 on both sides; Among them, starting the dual-axis reduction motor 3321 synchronously drives the driving screws 3322 on both sides to rotate, thereby driving the screw sleeves 3323 on both sides to move relative to each other, and then driving the positioning clamps 3324 on both sides to move relative to each other, thereby realizing the clamping and positioning operation of heat exchangers of different sizes.

[0028] The intermittent drive mechanism 34 specifically includes the following structures: A driving motor 341 installed at the bottom of the cylindrical base 31; A drive shaft 342 connected to the output end of the drive motor 341, wherein the drive shaft 342 serves as a power input component of the positioning fixture rotation drive mechanism 35, and further transmits power to the heat exchanger positioning fixture 33 rotating at the sandblasting station, thereby driving the heat exchanger positioning fixture 33 at the sandblasting station to rotate and drive the heat exchanger positioning fixture 33 at the sandblasting station; A driving disc 343 mounted on the top of the driving shaft 342; A driving boss 345 installed near the edge of the top of the driving rotary disc 343; A rotary table drive shaft 347 connected to the center of the bottom of the rotary table 32; An intermittent transmission member 346 connected to the bottom end of the rotary table drive shaft 347 and transmitting the motion of the drive boss 345; A support shaft 348 installed at the bottom center of the cylindrical base 31 and supported at the bottom center of the intermittent transmission member 346; A damping disc 344 is mounted on the top surface of the driving rotary disc 343 and cooperates with the intermittent transmission member 346 to limit the intermittent transmission member 346 from rotating to a specific angle and then continuing to rotate.

[0029] The intermittent transmission member 346 is specifically configured as a four-pointed star shape, and each edge of the intermittent transmission member 346 is configured as an arc shape that is adapted and fitted to the outer edge of the damping disc 344; Each corner end of the intermittent transmission member 346 is provided with a transmission guide groove 3461 extending toward the center position, and the internal groove shape of the transmission guide groove 3461 is adapted to the import and export operation of the driving boss 345; Among them, the driving motor 341 drives the driving shaft 342 to rotate, thereby driving the driving disc 343 to rotate. At this time, the driving boss 345 follows the driving disc 343 to make a circular motion until it rotates to the intermittent transmission member 346 on the right. At this time, the driving boss 345 enters a transmission guide groove 3461 inside the intermittent transmission member 346, and then the driving boss 345 continues to move, and then slides out from the transmission guide groove 3461. This kind of movement can realize the operation of driving the intermittent transmission member 346 to intermittently rotate a specific angle. At the same time, when the driving boss 345 disengages from the transmission guide groove 3461, the damping disc 344 can limit the intermittent transmission member 346 from continuing to rotate, waiting for the next driving operation of the driving boss 345 to rotate back.

[0030] The positioning fixture rotation drive mechanism 35 specifically includes the following structure: A transmission shaft 352 distributed outside the cylindrical base 31 and located behind the sandblasting station; A positioning tooling rotating drive disk 353 installed at the top of the transmission shaft 352, the front edge of which just fits the edge of the heat exchanger clamping positioning tooling 33 transferred to the sandblasting station, to achieve a fitting rotation transmission operation; A synchronous transmission belt 351 sleeved between the transmission shaft 352 and the drive shaft 342; Among them, the synchronous transmission belt 351 transmits the rotation drive of the driving shaft 342 to the transmission shaft 352 for rotation, thereby driving the upper positioning tooling rotating drive disk 353 to rotate. At this time, the positioning tooling rotating drive disk 353 can drive the rotation drive operation of the heat exchanger positioning tooling 33 to the sandblasting position. During this period, the driving boss 345 disengages from the transmission guide groove 3461, and the entire rotary table 32 completes the position change and stops rotating. At this time, the heat exchanger positioning tooling 33 at the sandblasting station temporarily stops at this position and is driven by the positioning tooling rotating drive disk 353 to realize self-rotation. At this time, a 360° sandblasting operation can be realized, waiting for the driving boss 345 to rotate back again and enter the next transmission guide groove 3461, so that the next heat exchanger positioning tooling 33 can be replaced and enter the sandblasting station.

[0031] The edge of the positioning tool rotation drive disk 353 is set to be made of fluororubber material to enhance the friction force of the rotation drive.

[0032] The sandblasting machine 2 is specifically installed at the center of the back wall of the sandblasting machine box 1. The sandblasting machine 2 is provided with multiple sandblasting nozzles and are all aimed at the workstations waiting for sandblasting operation inside the intermittent feeding mechanism 3, ensuring that the sandblasting covers every corner of the heat exchanger, thereby improving the uniformity and efficiency of the sandblasting.

[0033] The front side of the sandblasting machine box 1 is provided with two left-right symmetrical passage openings 11 for the heat exchanger positioning fixture 33 to rotate into and out of; The two passage openings 11 are designed to ensure that the four heat exchanger positioning fixtures 33 do not interfere with the sandblasting chassis 1 during the position change operation, and to ensure that the sandblasting chassis 1 is in a closed state during the sandblasting operation. How it works Loading stage: The heat exchanger is fed into the sandblasting machine box 1 through the intermittent feeding mechanism 3.

[0034] The heat exchanger is placed on a freely rotatable cylindrical positioning table 331 and fixed by a heat exchanger clamping positioning assembly 332 .

[0035] Positioning and rotation phase: The rotary table 32 brings the heat exchanger positioning tool 33 to the interior of the sandblasting machine box 1.

[0036] The driving motor 341 is started, and drives the intermittent transmission member 346 to rotate through the driving shaft 342 and the driving rotary disk 343, so that the rotary table 32 performs intermittent rotation.

[0037] When the driving boss 345 enters the transmission guide groove 3461, the intermittent transmission member 346 rotates a specific angle, and the turntable 32 rotates accordingly, turning the heat exchanger positioning tooling 33 to the sandblasting station, the damping disc 344 limits the rotation of the intermittent transmission member 346, and the turntable 32 stops rotating, waiting for the next drive of the driving boss 345.

[0038] Sandblasting operation stages: The multiple sandblasting nozzles in the sandblasting machine 2 start to work and perform sandblasting on the heat exchanger.

[0039] The positioning fixture rotation drive mechanism 35 drives the heat exchanger positioning fixture 33 to rotate 360° through the synchronous transmission belt 351, the transmission shaft 352 and the positioning fixture rotation drive disk 353, ensuring that the sandblasting evenly covers every corner of the heat exchanger at that station.

[0040] Sandblasting completion and repositioning stage: After the sandblasting is completed, the driving boss 345 enters the next transmission guide groove 3461 again, driving the rotary table 32 and the heat exchanger positioning fixture 33 to change positions, and positioning the next heat exchanger to the sandblasting station.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0042] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automatic sandblasting machine for heat exchange production, comprising a sandblasting machine box (1) and a sandblasting machine (2), characterized in that: The front side of the sandblasting machine box (1) is equipped with an intermittent feeding mechanism (3) with half of the machine body protruding into the interior thereof; The intermittent feeding mechanism (3) specifically comprises the following structure: a cylindrical base (31) as an external support structure; A rotary table (32) rotatably clamped to the upper end of the cylindrical base (31); An intermittent driving mechanism (34) disposed inside the cylindrical base (31) and used to drive the rotary table (32) to perform intermittent rotation; A heat exchanger positioning tool (33) installed at four positions, front, back, left, and right, on the top of the rotating platform (32); A positioning fixture rotation drive mechanism (35) distributed inside the sandblasting machine box (1) and driving the internal drive end of the intermittent drive mechanism (34) is used to drive the heat exchanger positioning fixture (33) to rotate to the innermost side of the sandblasting machine box (1) to perform a 360° rotation to cooperate with the sandblasting operation.

2. The automatic sandblasting machine for heat exchange production according to claim 1, characterized in that: The heat exchanger positioning tool (33) specifically comprises the following structure: A cylindrical positioning platform (331) mounted on the top surface of the rotary platform (32) and capable of freely rotating; Mounting grooves (333) distributed on the top of the positioning platform (331); A heat exchanger clamping and positioning assembly (332) is installed inside the installation groove (333).

3. The automatic sandblasting machine for heat exchange production according to claim 2, characterized in that: The heat exchanger clamping and positioning assembly (332) specifically comprises the following structure: A dual-axis reduction motor (3321) installed at the center position inside the installation groove (333); Drive screw rods (3322) respectively connected to the output ends on both sides of the dual-axis reduction motor (3321); A screw rod sleeve (3323) correspondingly threadedly sleeved on the driving screw rods (3322) on both sides; Correspondingly, positioning clamps (3324) are fixedly mounted on the top tube walls of the screw rod sleeves (3323) on both sides.

4. The automatic sandblasting machine for heat exchange production according to claim 1, characterized in that: The intermittent drive mechanism (34) specifically comprises the following structure: A driving motor (341) installed on the inner bottom of the cylindrical base (31); A drive shaft (342) connected to the output end of the drive motor (341), wherein the drive shaft (342) serves as a power input component of the positioning fixture rotation drive mechanism (35), thereby transmitting power to the heat exchanger positioning fixture (33) rotating at the sandblasting station, thereby driving the heat exchanger positioning fixture (33) at the sandblasting station to rotate; A driving disc (343) mounted on the top end of the driving shaft (342); A driving boss (345) mounted on the top of the driving rotary disk (343) close to the edge; A rotary table drive shaft (347) connected to the center of the bottom of the rotary table (32); An intermittent transmission member (346) connected to the bottom end of the rotary table drive shaft (347) and transmitting motion with the drive boss (345); A support shaft (348) installed at the bottom center of the cylindrical base (31) and supported at the bottom center of the intermittent transmission member (346); A damping disc (344) is mounted on the top surface of the driving rotary disc (343) and cooperates with the intermittent transmission member (346) to limit the intermittent transmission member (346) from rotating to a specific angle and then continuously rotating.

5. The automatic sandblasting machine for heat exchange production according to claim 4, characterized in that: The intermittent transmission member (346) is specifically configured in a four-pointed star shape, and each edge of the intermittent transmission member (346) is configured in an arc shape that is adapted to and fits the outer edge of the damping disc (344); Each corner end of the intermittent transmission member (346) is provided with a transmission guide groove (3461) extending towards the center position, and the internal groove shape of the transmission guide groove (3461) is adapted to the import and export operations of the driving boss (345).

6. The automatic sandblasting machine for heat exchange production according to claim 4, characterized in that: The positioning tool rotation drive mechanism (35) specifically comprises the following structure: A transmission shaft (352) distributed outside the cylindrical base (31) and located behind the sandblasting station; A positioning tool rotating drive disk (353) installed at the top end of the transmission shaft (352), wherein the front edge of the positioning tool rotating drive disk (353) just fits against the edge of the heat exchanger clamping positioning tool (33) at the sandblasting station, thereby achieving a fitting rotation transmission operation; A synchronous transmission belt (351) sleeved between the transmission shaft (352) and the drive shaft (342).

7. The automatic sandblasting machine for heat exchange production according to claim 1, characterized in that: The edge of the positioning tool rotation drive disk (353) is configured to be made of fluororubber material, so as to increase the friction force of the rotation drive.

8. The automatic sandblasting machine for heat exchange production according to claim 1, characterized in that: The sandblasting machine (2) is specifically installed at the center of the back wall of the sandblasting machine box (1). The sandblasting machine (2) is provided with a plurality of sandblasting nozzles which are all aimed at the working position waiting for the sandblasting operation inside the intermittent feeding mechanism (3).

9. The automatic sandblasting machine for heat exchange production according to claim 1, characterized in that: The front side of the sandblasting machine box (1) is provided with two left-right symmetrical passage openings (11) for the heat exchanger positioning tooling (33) to rotate into and out of.

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