Connecting rod ball head assembly for high speed punch and installation method thereof

Abstract

The application provides a connecting rod ball head assembly for a high-speed punch, which comprises a ball sleeve and a ball head, the ball sleeve is provided with a mounting cavity, the bottom of the mounting cavity is provided with a sewage storage groove, the side wall of the ball sleeve is provided with an oil inlet channel and a sewage discharge channel, the end of the oil inlet channel and the end of the sewage discharge channel are provided with plugs; the ball head comprises a ball head body, the ball head body is installed in the mounting cavity and can rotate, the lower end of the ball head body is flat and forms a plane, the plane has a gap with the inner wall of the mounting cavity and forms an oil cavity, and the oil cavity is filled with lubricating oil. The connecting rod ball head assembly for the high-speed punch is convenient and labor-saving to install, has good lubricating effect, has long service life, is convenient for daily maintenance and maintenance, and has low use cost.

Description

Technical Field

[0001] This invention relates to a punch press, and more particularly to a connecting rod ball head assembly for a high-speed punch press and its installation method. Background Technology

[0002] A high-speed stamping press includes a crankshaft, connecting rod, ball joint and ball sleeve, and slide block. The crankshaft's rotation drives the connecting rod, ball joint and ball sleeve, and slide block to move up and down, thereby driving the stamping die mounted on the slide block to move up and down, completing the stamping process. The ball joint and ball sleeve are crucial kinematic pairs connecting the connecting rod and slide block. The ball joint is made of alloy steel and its upper end is fixedly connected to the connecting rod; the ball sleeve is made of copper alloy and is tightly connected to the slide block, serving as a vital pressure transmission component in the high-speed stamping press. Currently, the ball joints in high-speed stamping presses have a completely spherical lower part; the ball sleeve is located below the ball joint, and the upper end of its internal spherical crown cavity is generally about 2 / 3 of the radius. The ball joint and ball sleeve are lubricated with grease. This structure basically meets the needs of current high-speed stamping presses, but its lubrication effect is not ideal. The two metal surfaces of the ball joint and ball sleeve are prone to direct contact, leading to wear or scoring. Summary of the Invention

[0003] [1] Technical problems to be solved

[0004] The technical problem to be solved by the present invention is to provide a connecting rod ball head assembly for a high-speed punch press that is easy and labor-saving to install, has good lubrication effect, and has a long service life.

[0005] [2] Technical solutions to the problem

[0006] This invention provides a connecting rod ball joint assembly for a high-speed punch press, comprising:

[0007] The ball sleeve 1 serves as a support and mounting carrier. The ball sleeve 1 has a hemispherical mounting cavity 10 with an open upper end. The bottom of the mounting cavity 10 has a concave hole forming a sludge storage tank 101. The side wall of the ball sleeve 1 has an oil inlet channel 102 and a sludge discharge channel 103 that connect the sludge storage tank 101. Both the oil inlet channel 102 and the sludge discharge channel 103 have plugs at their ends.

[0008] The ball head 2 includes a connecting rod 22 and a ball head body 23 disposed at the end of the connecting rod 22. The ball head body 23 is spherical and has the same diameter as the mounting cavity 10. The ball head body 23 is installed in the mounting cavity 10 and can rotate. The lower end of the ball head body 23 is flattened to form a plane. There is a gap between the plane and the inner wall of the mounting cavity 10 to form an oil cavity 230. The oil cavity 230 is filled with lubricating oil.

[0009] Furthermore, the oil inlet channel 102 is inclined and located above the sewage discharge channel 103, and the diameter of the oil inlet channel is larger than the diameter of the sewage discharge channel.

[0010] Furthermore, the bottom of the sludge storage tank is provided with a connecting hole 1011 coaxial with it. The diameter of the connecting hole 1011 is smaller than the diameter of the sludge storage tank, and the connecting hole is connected to the side wall of the storage tank through an inclined surface. The lower end of the connecting hole 1011 is connected to the sewage discharge channel.

[0011] Furthermore, the side wall of the ball sleeve 1 is provided with a first threaded hole 12 that is coaxial with and communicates with the oil inlet channel. The diameter of the first threaded hole 12 is larger than the diameter of the oil inlet channel 102 and a stepped surface is formed between them. A first plug 31 is internally threaded into the first threaded hole 12. A gap is provided between the end of the first plug 31 and the stepped surface to serve as an oil pressure compensation zone. The horizontal height of the oil pressure compensation zone is higher than the top surface of the oil cavity.

[0012] Furthermore, a spring is provided between the end of the first plug 31 and the stepped surface.

[0013] Furthermore, the ratio of the depth of the mounting cavity 10 to the radius of the mounting cavity 10 is 1.

[0014] Furthermore, the distance between the plane and the center of the ball head body 23 is 85%-92% of the radius of the ball head body 23.

[0015] Furthermore, the edge of the plane is chamfered to form an inclined surface, and the angle between the inclined surface and the plane is greater than or equal to 25 degrees and less than or equal to 32 degrees.

[0016] Furthermore, the ratio of the distance b between the end of the inclined surface and the pitch circle of the ball head body 23 to the radius of the ball head body 23 is greater than or equal to 0.01 and less than or equal to 0.015.

[0017] Meanwhile, the present invention also provides a method for installing a connecting rod ball joint assembly for a high-speed punch press, which includes the following steps:

[0018] S1. Cleaning: Clean the surface of the mounting cavity and ball head to ensure that there are no particulate impurities on the surface. At the same time, use an air nozzle to clean the oil inlet channel 102 and the drain channel 103.

[0019] S2. Apply thin oil lubricant to the surface of the ball head and / or mounting cavity;

[0020] S3. Align the ball head with the mounting cavity and install it into the mounting cavity. After installation, make the plane at the end of the ball head perpendicular to the axis of the mounting cavity, and make the plane and the mounting cavity form an oil cavity that connects to the sludge storage tank.

[0021] S4. Inject thin oil lubricating oil into the oil inlet channel;

[0022] S5. When oil flows out of the drain channel, seal the end of the drain channel with a plug, and at the same time, continue to inject thin oil lubricating oil into the oil inlet channel.

[0023] S6. After the oil pressure compensation area is filled with oil in the oil inlet channel, install the spring and screw in the first plug.

[0024] S7. Start the stamping machine to create relative motion between the ball head and the ball sleeve;

[0025] When the connecting rod of the high-speed punch press drives the ball head downwards rapidly, it compresses and causes the lubricating oil to flow upwards along the ball head and ball sleeve joint surface, forming a pressurized lubricating oil film layer between the ball head and ball sleeve joint surfaces.

[0026] When the connecting rod of the high-speed punch press drives the ball head to return, it creates a negative pressure in the lubricating oil in the oil chamber, which absorbs the lubricating oil on top and flows back to clean the ball surface of the ball head and ball sleeve.

[0027] S8. After starting the machine for 3-5 minutes, stop the machine and make the plane at the end of the ball head perpendicular to the axis of the mounting cavity. Tighten the first plug in the tightening direction to reduce the volume of the oil inlet channel and increase the internal oil pressure until oil overflows from the edge of the mounting cavity.

[0028] S9. Installation complete.

[0029] [3] Beneficial effects

[0030] This invention relates to a connecting rod ball end assembly for high-speed punch presses. It features an oil inlet and a drain channel on the ball sleeve, enabling rapid oiling and draining, convenient and labor-saving maintenance, and low cost, eliminating the need for disassembly. A compensation zone allows for rapid replenishment of lost lubricating oil, making replenishment convenient and quick. The redesigned ball end structure forms an oil cavity with the mounting cavity, allowing lubricating oil to enter the contact surface during use, resulting in good performance. A chamfered structure at the end of the ball end creates positive and negative pressure in the oil cavity during use, promoting lubricating oil flow between the ball end and the mounting cavity, resulting in good lubrication and cleaning of the ball surface to prevent dust abrasion. This assembly offers good stability and a long service life. This invention provides a connecting rod ball end assembly for high-speed punch presses that is easy and labor-saving to install, provides good lubrication, has a long service life, facilitates daily maintenance, and has low operating costs. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the connecting rod ball joint assembly for a high-speed punch press according to the present invention;

[0032] Figure 2 This is a cross-sectional view of the connecting rod ball joint assembly for high-speed punching machines according to the present invention;

[0033] Figure 3 This is a schematic diagram of the ball sleeve structure of the connecting rod ball head assembly for high-speed punching machines according to the present invention;

[0034] Figure 4 This is a cross-sectional view of the ball sleeve of the connecting rod ball head assembly for high-speed punching machines according to the present invention;

[0035] Figure 5 This is a schematic diagram of the ball head structure of the connecting rod ball head assembly for high-speed punching machines according to the present invention;

[0036] Figure 6 for Figure 5 Enlarged view of section A in the middle;

[0037] Figure 7 This is a schematic diagram showing the state of the connecting rod ball joint assembly for high-speed punch press under pressure according to the present invention;

[0038] Figure 8 This is a schematic diagram of the state of the connecting rod ball joint assembly for high-speed punch press under tension according to the present invention. Detailed Implementation

[0039] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0040] See Figures 1-8 The present invention provides a connecting rod ball head assembly for a high-speed punch press, including a ball sleeve 1 and a ball head 2 mounted on the ball sleeve 1.

[0041] The ball sleeve 1 serves as a support and mounting carrier for mounting the ball head 2. The ball sleeve has a circular cross-section and an opening at the top of its top surface, which is a hemispherical mounting cavity 10. In this embodiment, the ratio of the depth to the radius of the mounting cavity 10 is 1, meaning the depth and radius of the mounting cavity are the same. The bottom of the ball sleeve has a first mounting part, which is circular and coaxial with the ball sleeve, for connecting with other parts of the machine body. A groove is provided at the bottom of the mounting cavity 10, forming a sludge storage tank 101. The groove is a circular hole and is coaxial with the ball sleeve 1. In this application, an oil inlet channel 102 and a sludge discharge channel 103 are also provided on the side wall of the ball sleeve 1, which are respectively connected to the sludge storage tank 101. The oil inlet channel 102 is used for oil injection, and the sludge discharge channel 103 is used for discharging sludge. At the same time, a first plug is provided at the end of the oil inlet channel, and a second plug is provided at the end of the sludge discharge channel.

[0042] The structure of the oil inlet channel and the sewage outlet channel is described in detail below:

[0043] The oil inlet channel 102 is inclined and located above the drain channel 103. The diameter of the oil inlet channel is larger than the diameter of the drain channel. In this application, the ratio of the diameter of the oil inlet channel to the diameter of the drain channel is 2:1. A first screw hole 12 is formed on the side wall of the ball sleeve 1. This first screw hole 12 is coaxial with the oil inlet channel and is therefore also inclined. The diameter of the first screw hole 12 is larger than the diameter of the oil inlet channel 102. Therefore, a stepped surface is formed between the end of the first screw hole and the oil inlet channel. This stepped surface is perpendicular to the axis of the first screw hole 12. The first plug 31 is threaded into the first screw hole 12 and can achieve a seal. A gap is provided between the end and the stepped surface, which serves as an oil pressure compensation zone. A spring is provided between the end of the first plug 31 and the stepped surface. A connecting hole 1011 is provided at the bottom of the sludge storage tank. The connecting hole is coaxial with the storage tank. The diameter of the connecting hole 1011 is smaller than the diameter of the sludge storage tank. The connecting hole is connected to the side wall of the storage tank through a bevel (chamfer). The lower end of the connecting hole 1011 is connected to the drain channel. The drain channel is set horizontally, that is, perpendicular to the axis of the ball sleeve. A second screw hole 13 is provided on the side wall of the ball sleeve. The second screw hole is coaxial with the drain channel and the two are interconnected. A second plug 32 is threaded into the second screw hole to seal the drain channel.

[0044] The ball head 2 is installed on the ball sleeve. Specifically, the ball head 2 includes a connecting rod 22 and a ball head body 23 disposed at the end of the connecting rod 22. The connecting rod 22 is a frustum-shaped structure with a larger upper end and a smaller lower end. A second mounting part 21 is provided at the top of the connecting rod 22 for connecting with other parts of the machine body. The ball head body 23 is spherical and has the same diameter as the mounting cavity 10. The ball head body 23 is installed in the mounting cavity 10 and can rotate. After installation, the ball head body is in close contact with the inner wall of the mounting cavity, and the two can rotate relative to each other. Therefore, there is a very small gap between the outer wall of the ball head body and the inner wall of the mounting cavity, which is about 5-15 microns.

[0045] The lower end of the ball head body 23 is flattened to form a plane perpendicular to the axis of the connecting rod 22. A gap exists between the plane and the inner wall of the mounting cavity 10, forming a sealed chamber, which is an oil reservoir 230. The oil reservoir 230 is filled with lubricating oil for lubricating the ball head and ball sleeve. In this embodiment, the lubricating oil is a thin oil, which has lower viscosity and better fluidity. Simultaneously, when the plane is horizontal, i.e., perpendicular to the axis of the ball sleeve, the top surface of the oil cavity is located below the oil pressure compensation zone. The distance h between this plane and the center of the ball head body 23 is the distance between the ball head body 23 and the center of the ball. The thickness of the portion cut off at the end of the ball head body is 85%-92% of the radius, preferably 90%, meaning the thickness is 10% of the radius. A chamfer is provided at the edge of the plane, forming a bevel. The angle α between the bevel and the plane is greater than or equal to 25 degrees and less than or equal to 32 degrees, preferably 30 degrees. In this application, the ratio of the distance b between the end of the bevel and the pitch circle of the ball head body 23 to the radius of the ball head body 23 is greater than or equal to 0.01 and less than or equal to 0.015. This distance b is the distance between the end of the bevel (plane edge) and the pitch circle (the spherical surface where the outer wall of the ball head body is located) along the direction of the plane. See reference... Figure 6 It is used to help lubricating oil enter between the contact surface of the ball head body and the mounting cavity.

[0046] When the connecting rod of the high-speed punch press drives the ball head downwards rapidly, due to the manufacturing tolerance clearance of the ball head and ball sleeve, it can exert extrusive force on the lubricating oil in the lower cavity after being subjected to force. (See reference...) Figure 7 This forces the lubricating oil to flow upwards along the spherical surface of the ball joint and sleeve. Figure 7 As indicated by the arrow, it can form a thin layer of pressurized lubricating oil at the ball joint of the ball head and the ball sleeve, which can not only provide good lubrication, but also prevent the two metal surfaces of the ball head and the ball sleeve from making direct contact. Due to the high speed and high pressure characteristics of the high-speed punch press, as well as the 30-degree inclined plane, this oil film can generate enough pressure to support the ball head, and can also limit the oil film from flowing upward too quickly and overflowing.

[0047] When the connecting rod of the high-speed punch press drives the ball head to return, it can create negative pressure in the lubricating oil in the cavity. (See also...) Figure 8 It absorbs the lubricating oil flowing back ( Figure 8 (As indicated by the arrow) This process cleans the surface of the ball head and sleeve, carrying the incoming dust into the sludge storage tank at the bottom of the oil sump, preventing dust from abrading the ball surface, and greatly improving the stability and service life of the ball.

[0048] Meanwhile, the present invention also provides a method for installing a connecting rod ball joint assembly for a high-speed punch press, which includes the following steps:

[0049] S1. Cleaning: Clean the surfaces of the mounting cavity and ball head to remove particulate impurities. At the same time, use an air nozzle to blow air into the oil inlet channel 102 and the drain channel 103 to remove particulate impurities. To improve the cleaning effect, clean the channels first, and then clean the mounting cavity and ball head surfaces.

[0050] S2. Apply thin oil lubricant to the surface of the ball head and mounting cavity to avoid dry friction during assembly;

[0051] S3. Align the ball head with the mounting cavity and put the ball sleeve into the mounting cavity. After installation, make the plane at the end of the ball head perpendicular to the axis of the mounting cavity, so that an oil cavity is formed between the plane and the mounting cavity, which connects the sludge storage tank (oil inlet channel).

[0052] S4. Slowly inject thin oil lubricating oil into the oil inlet channel;

[0053] S5. When oil flows out of the drain channel, use the second plug to seal the end of the drain channel to prevent it from continuing to flow out. This process is used to remove the air in the channel and ensure that the lubricating oil can fully fill the inside of the channel. At the same time, since the diameter of the drain channel is smaller than that of the oil inlet channel, the internal air can be fully removed during the oil filling process.

[0054] After the second plug seals the sewage channel, continue to inject thin oil lubricating oil into the oil inlet channel;

[0055] S6. When the oil pressure compensation area is filled with oil in the oil inlet channel, install the spring and screw in the first plug to seal the oil inlet channel.

[0056] S7. Start the stamping machine to create relative motion between the ball head and the ball sleeve;

[0057] During this process, when the high-speed punch connecting rod drives the ball head downwards rapidly, it compresses and causes the lubricating oil to flow upwards along the ball head and ball sleeve mating surface, forming a pressurized lubricating oil film layer between the ball head and ball sleeve mating surface, thus achieving lubrication between the ball head and ball sleeve (mounting cavity);

[0058] When the connecting rod of the high-speed punch press drives the ball head to return, it creates a negative pressure in the lubricating oil in the oil chamber, absorbs the lubricating oil on top and flows back, flushing the spherical surface of the ball head and ball sleeve so that the oil film fully fills the gap between them and removes air.

[0059] S8. After starting the machine for 3-5 minutes, stop the machine. Through multiple positive and negative pressure actions, the air in the mounting cavity and channel can be fully discharged. At this time, the internal lubricating oil level will drop. Therefore, make the plane of the ball end perpendicular to the axis of the mounting cavity and turn the first plug in the tightening direction so that the first plug part enters the compensation zone, reducing the volume of the oil inlet channel, squeezing the internal lubricating oil, increasing the internal oil pressure, and discharging the air until oil overflows at the edge of the mounting cavity. At this time, stop tightening the first plug.

[0060] S9. Installation complete.

[0061] After prolonged use, the lubricating oil in the oil chamber will be depleted. At this time, by tightening the first plug, the oil in the compensation zone can be used to compensate, thus preventing the lubricating oil level in the oil chamber from being too low and affecting the lubrication effect.

[0062] When cleaning is required, it is not necessary to disassemble the entire ball joint assembly. Only the first and second bolts need to be removed, and the oil containing impurities, especially in the sludge tank, can be discharged under gravity. Alternatively, clean lubricating oil can be injected into the oil inlet channel to improve the sludge discharge efficiency and clean the sludge tank and the sludge discharge channel at the same time. Alternatively, an air nozzle can be directed into the oil inlet channel to create air pressure and discharge the internal dirty oil. After completing the sludge discharge and cleaning, the lubricating oil can be refilled according to the above steps. Cleaning and oil changing is convenient, labor-saving, and low-cost, and does not require disassembly.

[0063] This invention relates to a connecting rod ball end assembly for high-speed punch presses. It features an oil inlet and a drain channel on the ball sleeve, enabling rapid oiling and draining, convenient and labor-saving maintenance, and low cost, eliminating the need for disassembly. A compensation zone allows for rapid replenishment of lost lubricating oil, making replenishment convenient and quick. The redesigned ball end structure forms an oil cavity with the mounting cavity, allowing lubricating oil to enter the contact surface during use, resulting in good performance. A chamfered structure at the end of the ball end creates positive and negative pressure in the oil cavity during use, promoting lubricating oil flow between the ball end and the mounting cavity, resulting in good lubrication and cleaning of the ball surface to prevent dust abrasion. This assembly offers good stability and a long service life. This invention provides a connecting rod ball end assembly for high-speed punch presses that is easy and labor-saving to install, provides good lubrication, has a long service life, facilitates daily maintenance, and has low operating costs.

[0064] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method of installing a connecting rod ball head assembly for a high speed punch press, characterized by: The ball head assembly includes: The ball sleeve serves as a support and mounting carrier. It has a hemispherical mounting cavity with an open top. The bottom of the mounting cavity has a recessed hole that forms a sludge storage tank. The side wall of the ball sleeve has an oil inlet channel and a sludge outlet channel that connect to the sludge storage tank. Both the oil inlet channel and the sludge outlet channel have plugs at their ends. The ball head includes a connecting rod and a ball head body disposed at the end of the connecting rod. The ball head body is spherical and has the same diameter as the mounting cavity. The ball head body is installed in the mounting cavity and can rotate. The lower end of the ball head body is flattened to form a plane. There is a gap between the plane and the inner wall of the mounting cavity to form an oil cavity, which is filled with lubricating oil. The side wall of the ball sleeve has a first threaded hole that is coaxial with and connected to the oil inlet channel. The diameter of the first threaded hole is larger than the diameter of the oil inlet channel and a stepped surface is formed between them. A first plug is connected to the first threaded hole by an internal thread. There is a gap between the end of the first plug and the stepped surface, which serves as an oil pressure compensation zone. The horizontal height of the oil pressure compensation zone is higher than the top surface of the oil cavity. A spring is provided between the end of the first plug and the stepped surface. The installation method includes the following steps: S1. Cleaning: Clean the surface of the mounting cavity and ball head to ensure that there are no particulate impurities on the surface. At the same time, use an air nozzle to clean the oil inlet channel and the drain channel. S2. Apply thin oil lubricant to the surface of the ball head and / or mounting cavity; S3. Align the ball head with the mounting cavity and install it into the mounting cavity. After installation, make the plane at the end of the ball head perpendicular to the axis of the mounting cavity, and make the plane and the mounting cavity form an oil cavity that connects to the sludge storage tank. S4. Inject thin oil lubricating oil into the oil inlet channel; S5. When oil flows out of the drain channel, seal the end of the drain channel with a plug, and at the same time, continue to inject thin oil lubricating oil into the oil inlet channel. S6. After the oil pressure compensation area is filled with oil in the oil inlet channel, install the spring and screw in the first plug. S7. Start the stamping machine to create relative motion between the ball head and the ball sleeve; When the connecting rod of the high-speed punch press drives the ball head downwards rapidly, it compresses and causes the lubricating oil to flow upwards along the ball head and ball sleeve joint surface, forming a pressurized lubricating oil film layer between the ball head and ball sleeve joint surfaces. When the connecting rod of the high-speed punch press drives the ball head to return, it creates a negative pressure in the lubricating oil in the oil chamber, which absorbs the lubricating oil on top and flows back to clean the ball surface of the ball head and ball sleeve. S8. After starting the machine for 3-5 minutes, stop the machine and make the plane at the end of the ball head perpendicular to the axis of the mounting cavity. Tighten the first plug in the tightening direction to reduce the volume of the oil inlet channel and increase the internal oil pressure until oil overflows from the edge of the mounting cavity. S9. Installation complete.

2. The installation method of the connecting rod ball joint assembly for a high-speed punch press as described in claim 1, characterized in that: The oil inlet channel is inclined and located above the sewage outlet channel, and the diameter of the oil inlet channel is larger than the diameter of the sewage outlet channel.

3. The installation method of the connecting rod ball joint assembly for a high-speed punch press as described in claim 1, characterized in that: The bottom of the sludge storage tank is provided with a coaxial connecting hole. The diameter of the connecting hole is smaller than the diameter of the sludge storage tank, and the connecting hole is connected to the side wall of the sludge storage tank through an inclined surface. The lower end of the connecting hole is connected to the sewage discharge channel.

4. The installation method of the connecting rod ball joint assembly for a high-speed punch press as described in claim 1, characterized in that: The ratio of the depth of the mounting cavity to the radius of the mounting cavity is 1.

5. The installation method of the connecting rod ball joint assembly for a high-speed punch press as described in claim 1, characterized in that: The distance between the plane and the center of the ball head body is 85%-92% of the radius of the ball head body.

6. The installation method of the connecting rod ball joint assembly for a high-speed punch press as described in claim 1, characterized in that: The edge of the plane is chamfered and forms an inclined surface, and the angle between the inclined surface and the plane is greater than or equal to 25 degrees and less than or equal to 32 degrees.

7. The installation method of the connecting rod ball joint assembly for a high-speed punch press as described in claim 6, characterized in that: The ratio of the distance b between the end of the inclined plane and the pitch circle of the ball head body to the radius of the ball head body is greater than or equal to 0.01 and less than or equal to 0.015.

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