A punching device for air conditioner compressor piston

Abstract

The application discloses a punching device for an air conditioner compressor piston and belongs to the technical field of piston punching, which comprises a fixed component, and the fixed component comprises a punching device main body, an inner support assembly for supporting the inner wall of the piston skirt is arranged in the punching device main body, and an adjusting cavity is arranged in the punching device main body; the inner support centering is performed on the inner wall of the piston skirt through a plurality of support plates cooperating with anti-skid pads; the outer V-shaped clamping plate only performs circumferential auxiliary limiting and slight clamping; the inner and outer clamping forces are balanced by being counteracted; the problems that the clamping force is concentrated, the stress is uneven, the aluminum thin-wall piston skirt is clamped and damaged, and the aluminum thin-wall piston skirt is extruded and deformed in the traditional outer clamping mode are effectively solved; the defects that the workpiece is prone to circumferential slipping and deviation when being positioned by the single outer clamping are avoided; in addition, the inner support structure can effectively support the thin wall of the piston, the stability of the overall structure of the piston in the punching process is greatly improved, and the punching forming quality is ensured.

Description

Technical Field

[0001] This invention relates to the field of piston drilling technology, and more specifically, to a drilling device for an air conditioning compressor piston. Background Technology

[0002] Air conditioning compressors are the core power components of refrigeration appliances and industrial refrigeration systems. As a key moving component inside the compressor, the piston's machining quality directly determines the compressor's operational stability, lubrication effect, noise level, and overall service life. The piston body needs to be machined with transverse through pin holes and oblique oil holes on both sides of the skirt that connect the pin holes. The dimensional accuracy, positional accuracy, and coaxiality of the hole system are subject to stringent requirements. Currently, the industry mainly uses specialized drilling equipment to complete the drilling and boring of the above holes.

[0003] Currently, conventional air conditioning compressor piston drilling devices on the market generally adopt a structure that uses a single external V-shaped clamping plate to clamp and position the outer circle of the piston skirt. In terms of processing technology, they mostly adopt a step-by-step processing mode with multiple stations and multiple clamping. They rely on an independent power head to complete the processing of pin holes and double-sided inclined oil holes in sequence. However, relying solely on the external V-block to clamp the outer circle of the piston skirt is a line contact single-sided clamping. The clamping force is concentrated and the overall force on the workpiece is uneven. Moreover, air conditioning compressor pistons are mostly die-cast aluminum alloy thin-walled parts with weak structural rigidity. The concentrated external clamping force can easily cause damage to the precision-machined piston skirt and even cause the piston body to be squeezed and deformed. At the same time, the constraint ability of simply relying on the outer circle positioning is limited. During the drilling process, the cutting torque generated by the tool can easily cause the workpiece to slip circumferentially and shift its position. The overall stability of the piston is poor during the processing, which ultimately leads to substandard hole forming accuracy and a high product defect rate.

[0004] In view of this, we propose a drilling device for the piston of an air conditioner compressor. Summary of the Invention

[0005] Technical problem to be solved: The purpose of this invention is to provide a drilling device for the piston of an air conditioner compressor, which solves the technical problem mentioned in the background art.

[0006] Technical solution: The present invention provides a drilling device for an air conditioner compressor piston, including a fixing component, which includes a drilling device body. The drilling device body has an inner support assembly for supporting the inner wall of the piston skirt, an adjustment cavity, a driving assembly for driving the inner support assembly to move, and an inclined plate for guiding material. The cleaning component includes a cleaning assembly disposed inside the main body of the drilling device for cleaning chips, and a pressure relief assembly disposed inside the main body of the drilling device for relieving pressure on the drive assembly.

[0007] As an optional solution to the technical solution of this invention, the main body of the drilling device includes a machine base, a top plate is fixedly connected to the top of the machine base, a plurality of first cylinders are arranged inside the top plate, a clamping plate is arranged on the first cylinder, three lifting mechanisms are arranged inside the top plate, a feeding device is arranged above the lifting mechanism, a rotating device is arranged inside the feeding device, and a drill bit and a boring bar are respectively arranged on the three rotating devices.

[0008] As an optional solution to the technical solution of this invention, the clamping plate is V-shaped, the first cylinder penetrates the inner wall of the top plate, the clamping plate is located inside the top plate, the top of the machine tool is provided with an adjustment cavity, the clamping plate is located above the adjustment cavity, the adjustment cavity is located between several clamping plates, the boring tool is located between two drill bits, the feed device is located above the top plate, and both the drill bit and the boring tool are located above the clamping plate.

[0009] By adopting the above technical solution, a three-tool synchronous machining structure consisting of a horizontal spindle and two symmetrical tilting adjustable spindles can be used to simultaneously complete the drilling and boring operations of the piston intermediate pin hole and the double-sided inclined oil hole after a single workpiece clamping and positioning.

[0010] As an optional solution to the technical solution of this invention, the internal support assembly includes a slide groove evenly opened on the top of the machine platform, a slide plate slidably connected inside the slide groove, a baffle fixedly connected to the slide plate, a support plate fixedly connected to the side of the slide plate away from the baffle, an anti-slip pad fixedly connected to the side of the support plate close to the slide plate, a pressure sensor provided between the support plate and the anti-slip pad, and an air storage bladder fixedly connected to the end of the slide plate away from the support plate, with an elastic element provided inside the air storage bladder.

[0011] As an optional solution of the technical solution in this invention document, the air reservoir is located below the baffle, the baffle is fixedly connected to the top of the machine base, the baffle is located below the top plate, the end of the air reservoir away from the slide plate is fixedly connected to the inner wall of the slide groove, the slide plate is elastically connected to the inner wall of the slide groove through an elastic element, the end of the slide plate away from the air reservoir extends through the inner wall of the slide groove to the interior of the adjustment cavity, the anti-slip pad is located at the upper end of the support plate, the anti-slip pad is located above the slide plate, several support plates are combined to form a cylinder, the upper end of the support plate is located between several clamping plates, several anti-slip pads are located between several clamping plates, the lower end of the side of the support plates that are close to each other is provided with a chamfer, the top of the slide plate is provided with a chamfer, and the size of the slide groove is adapted to the size of the slide plate.

[0012] By adopting the above technical solution, multiple sets of support plates and anti-slip pads are used to provide internal support and centering from the inner wall of the piston skirt. The external V-shaped clamping plate only provides circumferential auxiliary limiting and slight clamping, and the internal and external clamping forces cancel each other out and are balanced.

[0013] As an optional solution to the technical solution of this invention, the drive assembly includes a second cylinder disposed inside the machine tool, a piston rod slidably connected inside the second cylinder, and a top block fixedly connected to the top of the piston rod; The top block is located above the second cylinder and below the support plate. The top block has a frustum structure, and the conical surface of the top block fits into the chamfer of the support plate. The upper bottom surface of the top block is located between several support plates. An inclined plate is fixedly connected to the outer surface of the second cylinder, and the inclined plate is located at the lower end of the second cylinder.

[0014] As an optional solution to the technical solution of this invention, the cleaning component includes an air inlet formed on the side wall of the machine, an air inlet valve is provided inside the air inlet, a flow divider ring is provided inside the machine, ventilation grooves are provided inside the slide plate and the support plate, a first flat nozzle is provided on the top of the slide plate, a circumferential nozzle is provided on the top of the support plate, and a nozzle is provided on the bottom of the support plate. An air outlet valve is provided inside the first flat nozzle, the circumferential nozzle and the nozzle.

[0015] As an optional solution of the technical solution in this invention document, the air inlet is connected to a plurality of ventilation slots through a diversion ring, the first flat nozzle is connected to the ventilation slots, the circumferential nozzle is connected to the ventilation slots, the nozzle is connected to the ventilation slots, the first flat nozzle is aligned with the anti-slip pad, and the nozzle is aligned with the conical surface of the top block.

[0016] By adopting the above technical solution, a cleaning component is set up to clean the chips, avoiding chip residue from affecting the positioning accuracy of subsequent workpieces and the smoothness of mechanism operation, effectively reducing the probability of equipment jamming, positioning failure and other failures, and improving the stability of continuous processing of the equipment.

[0017] As an optional solution to the technical solution of this invention, the pressure relief assembly includes several connecting plates fixedly connected to the inclined plate, the connecting plates having a pressure relief channel inside, the pressure relief channel having a pressure regulating valve inside, and the inner wall of the regulating cavity having several second flat nozzles evenly arranged.

[0018] As an optional solution of the technical solution in this invention document, a plurality of second flat nozzles and a plurality of sliding grooves are staggered and distributed, the end of the connecting plate away from the inclined plate is fixedly connected to the top of the inner wall of the machine, the interior of the second cylinder is connected to the second flat nozzle through a pressure relief channel, the second cylinder and the top block are both located between a plurality of connecting plates, and the side of the connecting plate near the top block is provided with a chamfer.

[0019] By adopting the above technical solution, the pressure relief component can be used in conjunction with the cleaning component to improve the cleaning effect of chips.

[0020] Beneficial effects: One or more technical solutions provided in this invention have at least the following technical effects or advantages: 1. Multiple sets of support plates, in conjunction with anti-slip pads, provide internal support and centering from the inner wall of the piston skirt. The external V-shaped clamping plate only provides circumferential auxiliary limiting and slight clamping. The internal and external clamping forces cancel each other out and are balanced, effectively solving the problems of concentrated clamping force and uneven force distribution in traditional external clamping methods, which lead to damage and extrusion deformation of the aluminum thin-walled piston skirt. At the same time, it avoids the defects of circumferential slippage and displacement of the workpiece when using a single external clamping position. In addition, the internal support structure can provide effective support for the thin wall of the piston, greatly improving the stability of the overall piston structure during the drilling process and ensuring the drilling quality.

[0021] 2. By integrating a pressure sensor into the internal support assembly, along with an electronically controlled pressure regulating valve and a pressure relief assembly, the clamping pressure level can be intelligently matched according to the piston wall thickness and specifications, achieving differentiated and precise clamping: a low-pressure clamping mode is used for thin-walled pistons to avoid plastic deformation caused by rigid high-pressure clamping; a high-pressure clamping mode is used for thick-walled pistons to ensure clamping stability; when the clamping pressure exceeds the preset threshold, the pressure regulating valve can automatically open to release and maintain pressure, always maintaining a constant and reasonable clamping force. This solves the processing defects caused by the poor adaptability of the constant clamping force of traditional cylinders, which leads to springback displacement of the hole position after the thin-walled piston is depressurized, and insufficient clamping force causing the workpiece to rotate. This significantly improves the dimensional accuracy and yield of piston drilling.

[0022] 3. Utilizing an integrated chip removal mechanism comprised of an air reservoir, ventilation channels, and multiple sets of distributed nozzles, this system achieves thorough chip removal throughout the entire process, before and after machining. Before the workpiece is clamped and positioned, the airflow generated by the compression of the air reservoir can precisely clean the surface of the anti-slip pad, the top of the support plate, and the conical surface of the top block through the first flat nozzle, circumferential nozzle, and bottom nozzle, respectively. This proactively removes residual chips from the mechanism's surface, preventing the formation of hard spots from aluminum chips on the anti-slip pad's localized plugs. Such chips could cause radial misalignment between the piston center and the theoretical center after tightening, leading to failure of coaxiality and positional accuracy standards. Uneven chip distribution can also cause the piston axis to tilt. Misalignment can occur, completely compromising the self-centering accuracy of the internal support. Furthermore, the inner wall of the aluminum alloy piston is a precision-machined surface with a relatively soft texture. When aluminum chips from the gasket are squeezed by the tensioning force, they can create indentations, pits, or even micro-cracks on the inner wall of the piston. At the same time, localized stress concentration can further exacerbate the risk of deformation in thin-walled areas, leading to air leakage, cylinder wear, and reduced energy efficiency after piston assembly. Secondly, the chips separate the anti-slip pad from the inner wall of the piston, significantly reducing the friction on the contact surface. Under the action of drilling cutting torque, the piston is prone to circumferential rotation, directly causing misalignment of the inclined oil hole angle and out-of-tolerance roundness of the pin hole. 4. The gas discharged during the cylinder depressurization process can be used to blow the regulating chamber and the side wall of the slide plate in real time through the second flat nozzle, and the chip cleaning operation of the workstation is completed simultaneously. The function is highly integrated. At the same time, during the top block reset process, all the gas in the cylinder is discharged to participate in the blowing, which can perform a second deep chip cleaning of the processing station and transmission structure, avoiding the impact of chip residue on the subsequent workpiece positioning accuracy and the smoothness of mechanism operation, effectively reducing the probability of equipment jamming, positioning failure and other failures, and improving the stability of continuous processing of the equipment.

[0023] 5. Simultaneously, through the cooperation of the air reservoir and the elastic element, the support plate is always kept in an elastic tension state, which can achieve micro-axial compensation. It can effectively adapt to the height dimensional tolerance of pistons in different production batches. Precise positioning and clamping can be completed without manual fine-tuning of equipment parameters. Compared with the traditional rigid limit structure, this device has a higher fault tolerance rate and can be adapted to the processing of air conditioning compressor pistons of various specifications and sizes. It significantly reduces equipment debugging costs and manual operation difficulty, and effectively improves the equipment's universal adaptability and processing compatibility.

[0024] 6. Employing a three-tool synchronous machining structure consisting of one horizontal spindle and two symmetrical tilting spindles with adjustable angles, this system can simultaneously complete the drilling and boring of the piston's central pin hole and double-sided inclined oil holes after a single workpiece clamping and positioning. This eliminates the traditional multi-stage clamping and step-by-step machining mode, avoiding the cumulative positioning errors caused by multiple clampings and effectively ensuring the positional and coaxiality accuracy of the three holes. At the same time, the single-clamping multi-process machining method significantly shortens the auxiliary time for workpiece clamping, changing, and alignment, significantly improving the overall production efficiency of piston drilling and adapting to the needs of large-scale, assembly line mass production.

[0025] 7. By fully utilizing the chamfered edges of the sliding plate, the conical surface of the top block, the inclined surface of the inclined plate, and the chamfered edges of the connecting plate to form an all-round flow guiding structure, the metal chips generated during processing can smoothly slide into the collection frame by gravity, achieving automatic collection. At the same time, the chips are controlled into uniform short curls and segmented chips during processing. These chips are less likely to entangle the tool and generate ultrafine dust. This effectively avoids problems such as tool wear, chipping during drilling, and equipment jamming caused by tool entanglement, reducing tool wear and equipment maintenance costs. It also keeps the processing station clean, optimizes the processing conditions in the workshop, and further ensures the long-term stable operation of the equipment. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of the drilling device for the piston of an air conditioner compressor.

[0028] Figure 2 This is a cross-sectional schematic diagram of the pressure relief component in the drilling device for the piston of an air conditioner compressor.

[0029] Figure 3 Drilling device for air conditioner compressor piston Figure 2 Enlarged structural diagram at point A in the middle.

[0030] Figure 4 This is a cross-sectional schematic diagram of the drive component in the drilling device for the piston of an air conditioner compressor.

[0031] Figure 5 Drilling device for air conditioner compressor piston Figure 4 Enlarged structural diagram at point B.

[0032] Figure 6 Drilling device for air conditioner compressor piston Figure 4 Enlarged structural diagram at point C.

[0033] Figure 7 A cross-sectional schematic diagram of the cleaning component in the drilling device for the piston of an air conditioner compressor.

[0034] Figure 8 This is a schematic diagram showing the structural relationship between the support plate and the top block in the drilling device for the piston of an air conditioner compressor.

[0035] Figure 9 This is a three-dimensional structural diagram of the pressure relief component in the drilling device of the air conditioner compressor piston.

[0036] Figure 10 This is a three-dimensional structural diagram of the inner support component in the drilling device for the piston of an air conditioner compressor.

[0037] Explanation of the numbers in the diagram: 10. Drilling device body; 101. Machine base; 102. Top plate; 103. First cylinder; 104. Clamping plate; 105. Lifting mechanism; 106. Feeding device; 107. Rotating device; 108. Drill bit; 109. Boring tool; 11. Internal support assembly; 111. Slide groove; 112. Slide plate; 113. Baffle; 114. Support plate; 115. Anti-slip pad; 116. Pressure sensor; 117. Air reservoir; 118. Elastic element; 12. Adjustment chamber; 13. Drive assembly; 131. Second cylinder; 132. Piston rod; 133. Top block; 14. Inclined plate; 20. Cleaning assembly; 201. Air inlet; 202. Air inlet valve; 203. Flow divider ring; 204. Ventilation groove; 205. First flat nozzle; 206. Circumferential nozzle; 207. Nozzle; 208. Air outlet valve; 21. Pressure relief assembly; 211. Connecting plate; 212. Pressure relief channel; 213. Pressure regulating valve; 214. Second flat nozzle. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a link; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] Reference Figures 1 to 10 This invention provides a drilling device for an air conditioner compressor piston, including a fixing component, which includes a drilling device body 10, an inner support assembly 11 for supporting the inner wall of the piston skirt, an adjustment cavity 12, a driving assembly 13 for driving the inner support assembly 11 to move, and an inclined plate 14 for guiding material. The cleaning component includes a cleaning assembly 20 disposed inside the main body 10 of the drilling device for cleaning chips, and a pressure relief assembly 21 disposed inside the main body 10 of the drilling device for relieving pressure on the drive assembly 13.

[0042] Reference Figures 1 to 4This invention provides a drilling device for an air conditioner compressor piston. The main body 10 of the drilling device includes a machine base 101. A top plate 102 is fixedly connected to the top of the machine base 101. A plurality of first cylinders 103 are arranged inside the top plate 102. A clamping plate 104 is arranged on the first cylinders 103. Three lifting mechanisms 105 are arranged inside the top plate 102. A feeding device 106 is arranged above the lifting mechanism 105. A rotating device 107 is arranged inside the feeding device 106. A drill bit 108 and a boring bar 109 are respectively arranged on the three rotating devices 107. The clamping plate 104 is V-shaped. The first cylinder 103 penetrates the inner wall of the top plate 102. The clamping plate 104 is located inside the top plate 102. The top of the machine base 101 is provided with an adjustment cavity 12. The clamping plate 104 is located above the adjustment cavity 12. The adjustment cavity 12 is located between several clamping plates 104. The boring bar 109 is located between two drill bits 108. The feed device 106 is located above the top plate 102. Both the drill bit 108 and the boring bar 109 are located above the clamping plate 104. The top of the lifting mechanism 105 is provided with a connecting plate. The rotating device 107 is located inside the connecting plate. The outer wall of the feed device 106 is fixedly connected to the connecting plate. The bottom of the inner cavity of the machine base 101 is provided with a chip collection frame.

[0043] Reference Figures 3 to 10 This invention provides a drilling device for an air conditioner compressor piston. The inner support assembly 11 includes a slide groove 111 evenly opened on the top of the machine base 101. A slide plate 112 is slidably connected inside the slide groove 111. A baffle 113 is fixedly connected to the slide plate 112. A support plate 114 is fixedly connected to the side of the slide plate 112 away from the baffle 113. An anti-slip pad 115 is fixedly connected to the side of the support plate 114 close to the slide plate 112. A pressure sensor 116 is provided between the support plate 114 and the anti-slip pad 115. An air storage bag 117 is fixedly connected to the end of the slide plate 112 away from the support plate 114. An elastic element 118 is provided inside the air storage bag 117. The air reservoir 117 is located below the baffle 113, which is fixedly connected to the top of the machine base 101. The baffle 113 is located below the top plate 102. The end of the air reservoir 117 away from the slide plate 112 is fixedly connected to the inner wall of the slide groove 111. The slide plate 112 is elastically connected to the inner wall of the slide groove 111 via an elastic element 118. The end of the slide plate 112 away from the air reservoir 117 extends through the inner wall of the slide groove 111 into the interior of the adjustment cavity 12, providing anti-slip protection. The pad 115 is located at the upper end of the support plate 114, the anti-slip pad 115 is located above the slide plate 112, and several support plates 114 are combined to form a cylinder. The upper end of the support plate 114 is located between several clamping plates 104, and several anti-slip pads 115 are located between several clamping plates 104. The lower end of the side of the support plates 114 that are close to each other is provided with a chamfer. The top of the slide plate 112 is provided with a chamfer. The size of the slide groove 111 is adapted to the size of the slide plate 112. Multiple sets of support plates 114, in conjunction with anti-slip pads 115, provide internal support and centering from the inner wall of the piston skirt. The external V-shaped clamping plate 104 only provides circumferential auxiliary limiting and slight clamping. The internal and external clamping forces cancel each other out and are balanced, effectively solving the problem of concentrated clamping force and uneven force distribution in traditional external clamping methods, which leads to damage and extrusion deformation of the aluminum thin-walled piston skirt. At the same time, it avoids the defects of circumferential slippage and displacement of the workpiece when using a single external clamping positioning. In addition, the internal support structure can provide effective support for the thin wall of the piston, greatly improving the stability of the overall piston structure during the drilling process and ensuring the drilling forming quality.

[0044] Reference Figures 4 to 9 This invention provides a drilling device for an air conditioner compressor piston. The drive assembly 13 includes a second cylinder 131 disposed inside the machine base 101. A piston rod 132 is slidably connected inside the second cylinder 131, and a top block 133 is fixedly connected to the top of the piston rod 132. The top block 133 is located above the second cylinder 131 and below the support plate 114. The top block 133 has a frustum structure, and the conical surface of the top block 133 fits into the chamfer of the support plate 114. The upper bottom surface of the top block 133 is located between several support plates 114. An inclined plate 14 is fixedly connected to the outer surface of the second cylinder 131, and the inclined plate 14 is located at the lower end of the second cylinder 131.

[0045] Reference Figures 3 to 9This invention provides a drilling device for an air conditioner compressor piston. The cleaning component 20 includes an air inlet 201 formed on the side wall of the machine base 101. An air inlet valve 202 is provided inside the air inlet 201. A flow divider ring 203 is provided inside the machine base 101. Ventilation grooves 204 are provided inside the slide plate 112 and the support plate 114. A first flat nozzle 205 is provided on the top of the slide plate 112. A circumferential nozzle 206 is provided on the top of the support plate 114. A nozzle 207 is provided on the bottom of the support plate 114. An air outlet valve 208 is provided inside the first flat nozzle 205, the circumferential nozzle 206 and the nozzle 207. The air inlet 201 is connected to several ventilation slots 204 through the diversion ring 203. The first flat nozzle 205 is connected to the ventilation slots 204. The circumferential nozzle 206 is connected to the ventilation slots 204. The nozzle 207 is connected to the ventilation slots 204. The first flat nozzle 205 is aligned with the anti-slip pad 115. The nozzle 207 is aligned with the conical surface of the top block 133. The integrated chip removal mechanism, consisting of an air reservoir 117, a ventilation groove 204, and multiple sets of distributed nozzles, achieves comprehensive chip removal without dead angles before and after processing. Before the workpiece is clamped and positioned, the airflow generated by the compression of the air reservoir 117 can precisely blow away residual chips on the surface of the anti-slip pad 115, the top of the support plate 114, and the conical surface of the top block 133 through the first flat nozzle 205, the circumferential nozzle 206, and the bottom nozzle 207, respectively. This removes residual chips from the mechanism surface in advance, preventing the aluminum chips on the local pads of the anti-slip pad 115 from forming hard points, which could cause radial displacement between the piston center and the theoretical center after tightening, resulting in the failure of coaxiality and positional accuracy references. If the chip distribution is uneven... This can also cause the piston axis to tilt, resulting in misalignment and completely destroying the self-centering accuracy of the internal support. Furthermore, the inner wall of the aluminum alloy piston is a precision-machined surface with a relatively soft texture. When the aluminum chips from the gasket are squeezed by the tensioning force, they will press indentations, pits, or even micro-cracks into the inner wall of the piston. At the same time, local stress concentration will further aggravate the deformation risk of thin-walled parts, leading to air leakage, cylinder wear, and reduced energy efficiency after piston assembly. Secondly, the chips separate the anti-slip pad 115 from the inner wall of the piston, greatly reducing the friction of the contact surface. Under the action of drilling cutting torque, the piston is prone to circumferential rotation, directly causing the angle of the inclined oil hole to deviate and the roundness of the pin hole to exceed the tolerance. The gas discharged during the cylinder depressurization process can be used to blow the side walls of the adjustment chamber 12 and the slide plate 112 in real time through the second flat nozzle 214, and the chip cleaning operation of the workstation is completed simultaneously. The function is highly integrated. At the same time, during the reset process of the top block 133, all the gas in the cylinder is discharged to participate in the blowing, which can perform a second deep chip cleaning of the processing station and transmission structure, avoiding the impact of chip residue on the subsequent workpiece positioning accuracy and the smoothness of mechanism operation, effectively reducing the probability of equipment jamming, positioning failure and other failures, and improving the stability of continuous processing of the equipment.

[0046] Reference Figures 2 to 9The present invention provides a drilling device for an air conditioner compressor piston. The pressure relief assembly 21 includes a plurality of connecting plates 211 fixedly connected to the inclined plate 14. The connecting plates 211 are provided with a pressure relief channel 212 inside. The pressure relief channel 212 is provided with a pressure regulating valve 213 inside. The inner wall of the regulating chamber 12 is uniformly provided with a plurality of second flat nozzles 214. Several second flat nozzles 214 are staggered with several sliding grooves 111. The end of the connecting plate 211 away from the inclined plate 14 is fixedly connected to the top of the inner wall of the machine base 101. The interior of the second cylinder 131 is connected to the second flat nozzles 214 through the pressure relief channel 212. The second cylinder 131 and the top block 133 are both located between several connecting plates 211. The side of the connecting plate 211 near the top block 133 is provided with a chamfer. The pressure sensor 116 is integrated into the inner support assembly 11. Together with the electronically controlled pressure regulating valve 213 and the pressure relief assembly 21, it can intelligently match the tensioning pressure level according to the piston wall thickness and specifications to achieve differentiated and precise clamping: a low-pressure tensioning mode is used for thin-walled pistons to avoid plastic deformation caused by rigid high-pressure clamping; a high-pressure tensioning mode is used for thick-walled pistons to ensure clamping stability; when the clamping pressure exceeds the preset threshold, the pressure regulating valve 213 can automatically open to release and maintain pressure, always maintaining a constant and reasonable clamping force. This solves the processing defects caused by the poor adaptability of the constant clamping force of traditional cylinders, which leads to the springback and displacement of the hole after the thin-walled piston is depressurized, and the workpiece rotation caused by insufficient clamping force. This greatly improves the dimensional accuracy and yield of piston drilling.

[0047] This invention provides a drilling device for an air conditioner compressor piston, the working principle and usage process of which are as follows: First, the air conditioner compressor piston to be processed is moved to the upper part of the adjustment chamber 12 of the device, so that the inner hole of the lower end skirt of the piston is located outside the cylinder formed by all the support plates 114 and the processing station between multiple sets of clamping plates 104, and the lower end of the piston is located at the top of the slide plate 112. Then, the V-shaped clamping plate 104 is driven to move slightly closer by the first cylinder 103 to initially limit the outer circle of the piston and prevent the workpiece from shifting circumferentially. At this time, the clamping plate 104 only performs auxiliary positioning and slight clamping force. Simultaneously, the second cylinder 131 drives the piston rod 132 to push the frustum-shaped top block 133 upward. Since its conical surface fits against the chamfered bottom of the support plate 114, the upward movement of the top block 133 will gradually push each set of support plates 114 away from the top block 133, causing the slide plate 112 to slide outward along the slide groove 111, compressing the air storage bag 117 and the elastic element 118. At this time, the pressure regulating valve 213 is in the closed state until the anti-slip pad 115 on the support plate 114 abuts against the inner wall of the piston skirt. The anti-slip pad 115 achieves internal support and centering clamping from the piston cavity, which works with the external clamping plate 104 to improve the clamping effect. At the same time, the support plate 114 supports the inner wall, which can cancel out the clamping force of the external clamping plate 104, avoiding the situation where the piston thin wall is damaged and deformed when drilling due to the large clamping force of the external clamping plate 104.

[0048] The pressure sensor 116 between the support plate 114 and the anti-slip pad 115 collects tension pressure data in real time. The electronic control system matches the preset pressure level according to the piston wall thickness and specifications: low pressure tensioning is used for thin-walled pistons and high pressure tensioning is used for thick-walled pistons. When the pressure exceeds the set threshold, the pressure regulating valve 213 in the pressure relief channel 212 will be automatically activated to relieve pressure and maintain pressure on the second cylinder 131, further preventing the aluminum thin-walled piston from deforming under pressure and the hole from springing back after processing. At the same time, it prevents the workpiece from rotating due to insufficient clamping force. When the pressure is relieved, the gas discharged from the second cylinder 131 will be sprayed out from the second flat nozzle 214 through the pressure relief channel 212 to blow the inside of the adjustment cavity 12 and the side wall of the slide plate 112. Secondly, the air reservoir 117, in conjunction with the internal elastic element 118, can keep the support plate 114 in an elastically taut state, thereby achieving slight axial compensation, adapting to pistons with different height tolerances, and completing the all-round stable positioning of the workpiece. When the air reservoir 117 is compressed, the air inside will enter the ventilation groove 204, and after breaking through the exhaust valve 208, it will be ejected from the first flat nozzle 205, the circumferential nozzle 206, and the nozzle 207 respectively: the surface of the anti-slip pad 115 is blown before it contacts the piston to prevent residual chips on the anti-slip pad 115 from affecting the contact between the anti-slip pad 115 and the piston; the top of the support plate 114 is circumferentially blown; the conical surface of the top block 133 is blown to prevent residual chips on the conical surface of the top block 133 from affecting the sliding of the support plate 114. During drilling, the three sets of lifting mechanisms 105 and feeding devices 106 above the top plate 102 are started simultaneously, driving the rotating device 107 and the matching cutting tools to move according to the required drilling positions preset by pistons of different sizes, so that the drill bits 108 on both sides and the boring tool 109 in the middle are aligned with the preset processing positions of the pistons. Then, the three sets of spindles are fed and operated synchronously, using the drill bits 108 to process double-sided inclined oil holes and the boring tool 109 to process the middle pin hole. The three-hole drilling and boring operations are completed simultaneously in one clamping. During the processing, the internal support components maintain a constant clamping force to ensure processing accuracy. The metal chips generated during processing fall naturally and slide down the chamfer on the top of the slide plate 112, the conical surface of the top block 133, the inclined surface of the inclined plate 14, and the chamfer of the connecting plate 211 into the collection frame at the bottom of the inner cavity of the machine 101, realizing the initial material collection. The chips are controlled into short, coiled, and segmented chips with uniform size, easy flow, and are not easy to wrap around the tool or form ultrafine powder. After drilling is completed, the lifting mechanism 105 and the feeding device 106 will drive the tool to reset to the initial position, and the second cylinder 131 will depressurize and retract, causing the top block 133 to move down with the piston rod 132, and causing all the gas in the second cylinder 131 to be ejected through the second flat nozzle 214, improving the purging effect and preventing chip residue from affecting the next structural movement and positioning accuracy; and the elastic element 118 will push the slide plate 112 and the support plate 114 to slide away from the elastic element 118, so that the support plate 114 releases the tension on the inner wall of the piston. At this time, the air bladder 117 is stretched and will draw in air through the air inlet 201. Finally, the first cylinder 103 drives the clamping plate 104 to reset, releasing the workpiece auxiliary limit. The processed piston can then be removed. After all components of the device return to their initial positions, wait for the next piston workpiece to be loaded, and repeat the above process to carry out continuous processing.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A drilling device for an air conditioner compressor piston, characterized in that: include The fixing component includes a punching device body (10), an inner support assembly (11) for supporting the inner wall of the piston skirt is provided inside the punching device body (10), an adjustment cavity (12) is provided inside the punching device body (10), a drive assembly (13) for driving the inner support assembly (11) to move is provided inside the punching device body (10), and an inclined plate (14) for guiding material is provided inside the punching device body (10). The cleaning component includes a cleaning assembly (20) disposed inside the main body (10) of the drilling device for cleaning chips, and a pressure relief assembly (21) disposed inside the main body (10) of the drilling device for relieving pressure on the drive assembly (13).

2. The drilling device for the piston of an air conditioner compressor according to claim 1, characterized in that: The main body (10) of the drilling device includes a machine base (101), a top plate (102) is fixedly connected to the top of the machine base (101), a number of first cylinders (103) are arranged inside the top plate (102), a clamping plate (104) is arranged on the first cylinder (103), three lifting mechanisms (105) are arranged inside the top plate (102), a feeding device (106) is arranged above the lifting mechanism (105), a rotating device (107) is arranged inside the feeding device (106), and a drill bit (108) and a boring tool (109) are respectively arranged on the three rotating devices (107).

3. The drilling device for the piston of an air conditioner compressor according to claim 2, characterized in that: The clamping plate (104) is V-shaped. The first cylinder (103) penetrates the inner wall of the top plate (102). The clamping plate (104) is located inside the top plate (102). An adjustment cavity (12) is provided on the top of the machine base (101). The clamping plate (104) is located above the adjustment cavity (12). The adjustment cavity (12) is located between several clamping plates (104). The boring tool (109) is located between two drill bits (108). The feeding device (106) is located above the top plate (102). The drill bits (108) and the boring tool (109) are both located above the clamping plate (104).

4. The drilling device for the piston of an air conditioner compressor according to claim 2, characterized in that: The inner support assembly (11) includes a slide groove (111) evenly opened on the top of the machine base (101). A slide plate (112) is slidably connected inside the slide groove (111). A baffle (113) is fixedly connected on the slide plate (112). A support plate (114) is fixedly connected on the side of the slide plate (112) away from the baffle (113). An anti-slip pad (115) is fixedly connected on the side of the support plate (114) close to the slide plate (112). A pressure sensor (116) is provided between the support plate (114) and the anti-slip pad (115). An air storage bag (117) is fixedly connected at the end of the slide plate (112) away from the support plate (114). An elastic element (118) is provided inside the air storage bag (117).

5. The drilling device for the piston of an air conditioner compressor according to claim 4, characterized in that: The air reservoir (117) is located below the baffle (113), which is fixedly connected to the top of the machine base (101). The baffle (113) is located below the top plate (102). The end of the air reservoir (117) away from the slide plate (112) is fixedly connected to the inner wall of the slide groove (111). The slide plate (112) is elastically connected to the inner wall of the slide groove (111) through an elastic element (118). The end of the slide plate (112) away from the air reservoir (117) extends through the inner wall of the slide groove (111) into the interior of the adjustment cavity (12). The anti-slip mat (115) is located at the upper end of the support plate (114) and above the slide plate (112). Several support plates (114) are combined to form a cylinder. The upper end of the support plate (114) is located between several clamping plates (104). Several anti-slip mats (115) are located between several clamping plates (104). The lower end of the side of the support plates (114) that are close to each other is provided with a chamfer. The top of the slide plate (112) is provided with a chamfer. The size of the slide groove (111) is adapted to the size of the slide plate (112).

6. The drilling device for the piston of an air conditioner compressor according to claim 4, characterized in that: The drive assembly (13) includes a second cylinder (131) disposed inside the machine base (101), a piston rod (132) is slidably connected inside the second cylinder (131), and a top block (133) is fixedly connected to the top of the piston rod (132). The top block (133) is located above the second cylinder (131) and below the support plate (114). The top block (133) has a frustum structure. The conical surface of the top block (133) fits into the chamfer of the support plate (114). The upper bottom surface of the top block (133) is located between several support plates (114). An inclined plate (14) is fixedly connected to the outer surface of the second cylinder (131). The inclined plate (14) is located at the lower end of the second cylinder (131).

7. The drilling device for the piston of an air conditioner compressor according to claim 6, characterized in that: The cleaning component (20) includes an air inlet (201) opened on the side wall of the machine (101), an air inlet valve (202) is provided inside the air inlet (201), a flow divider ring (203) is provided inside the machine (101), and air vents (204) are provided inside the slide plate (112) and the support plate (114). A first flat nozzle (205) is provided on the top of the slide plate (112), a circumferential nozzle (206) is provided on the top of the support plate (114), and a nozzle (207) is provided at the bottom of the support plate (114). An air outlet valve (208) is provided inside the first flat nozzle (205), the circumferential nozzle (206), and the nozzle (207).

8. The drilling device for the piston of an air conditioner compressor according to claim 7, characterized in that: The air inlet (201) is connected to several ventilation slots (204) through a flow divider ring (203). The first flat nozzle (205) is connected to the ventilation slots (204). The circumferential nozzle (206) is connected to the ventilation slots (204). The nozzle (207) is connected to the ventilation slots (204). The first flat nozzle (205) is aligned with the anti-slip pad (115). The nozzle (207) is aligned with the conical surface of the top block (133).

9. The drilling device for the piston of an air conditioner compressor according to claim 7, characterized in that: The pressure relief assembly (21) includes several connecting plates (211) fixedly connected to the inclined plate (14). The connecting plate (211) has a pressure relief channel (212) inside. The pressure relief channel (212) has a pressure regulating valve (213) inside. The inner wall of the regulating cavity (12) is uniformly provided with several second flat nozzles (214).

10. The drilling device for the piston of an air conditioner compressor according to claim 9, characterized in that: Several second flat nozzles (214) are staggered with several sliding grooves (111). The end of the connecting plate (211) away from the inclined plate (14) is fixedly connected to the top of the inner wall of the machine base (101). The interior of the second cylinder (131) is connected to the second flat nozzle (214) through the pressure relief channel (212). The second cylinder (131) and the top block (133) are both located between several connecting plates (211). The connecting plate (211) has a chamfer on the side near the top block (133).

Images