Method and device for determining lubricating oil distribution ratio of five-point inclined elbow clamping mechanism

Abstract

The present invention discloses a method and device for determining the lubricant distribution ratio of a five-point oblique elbow-type clamping mechanism. The method comprises: during the process of uniformly closing the mold at a unit speed with a deformed crosshead of the five-point oblique elbow-type clamping mechanism, the crosshead stroke is equally divided into a first number of stroke segments; based on the geometric positional relationship between the various rotary pairs, the angular velocity corresponding to each rotary pair in each stroke segment is calculated using a geometric analysis method; based on the angular velocity corresponding to each rotary pair in each stroke segment, the cumulative power consumption of each rotary pair during the crosshead closing process is obtained using a preset interval power consumption accumulation calculation model; and the ratio of the cumulative power consumption of each rotary pair is calculated, and the ratio is used as the lubricant distribution ratio for each rotary pair of the five-point oblique elbow-type clamping mechanism. The present invention effectively avoids the risk of over-lubrication or under-lubrication caused by adding equal amounts of lubricant to the rotary pairs.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding machines, and in particular relates to a method and device for determining the lubricating oil distribution ratio of a five-point oblique elbow-type clamping mechanism. Background Art

[0002] In existing applications, the same amount of lubricant is typically added to the rotating pairs at the three major pins of the toggle lever in a five-point, tilted toggle clamping mechanism over the same period of time, and the same amount of lubricant is added to the remaining rotating pairs over the same period of time. In theory, during the actual mold clamping process, the forces and rotational speeds of each rotating pair vary. Practice has also shown that the degree of wear on each rotating pair varies over the same period of time. This existing lubricant addition method is clearly inappropriate, creating the risk of over- or under-lubrication at each lubrication point. Adjusting the lubricant amount ratio is necessary to achieve consistent wear. Summary of the Invention

[0003] The present invention provides a method and device for determining the lubricating oil distribution ratio of a five-point oblique elbow clamping mechanism, so as to solve the risk of over-lubrication or under-lubrication of different rotary pairs caused by an unreasonable method of filling the lubricating oil amount of the five-point oblique elbow clamping mechanism in the prior art.

[0004] To achieve the above-mentioned purpose, the specific technical solution of the method for determining the lubricating oil distribution ratio of a five-point oblique toggle clamping mechanism of the present invention is as follows:

[0005] During the process of uniformly closing the mold at a unit speed, the crosshead of the five-point oblique toggle clamping mechanism deforms and divides the stroke of the crosshead into a first number of stroke segments;

[0006] According to the geometric position relationship between each rotary pair, the angular velocity of each rotary pair in each stroke segment is calculated using the geometric analysis method;

[0007] Obtaining the accumulated power consumption of each rotary pair during the crosshead mold closing process according to the angular velocity corresponding to each rotary pair in each stroke segment using a preset interval power consumption accumulation calculation model;

[0008] The ratio of the accumulated power consumption of each rotary pair is calculated, and the ratio is used as the lubricating oil distribution ratio of each rotary pair of the five-point oblique elbow clamping mechanism.

[0009] Furthermore, the geometric position relationship between the various revolving pairs includes:

[0010] The first revolving pair A, the second revolving pair B, and the revolving center O form a fixed triangle, and the fixed triangle rotates around the revolving center O; wherein the first revolving pair A is connected to the revolving center O by a first connecting rod with a first length L1, and the second revolving pair B is connected to the revolving center O by a second connecting rod with a second length L2;

[0011] The first rotary pair A is connected to the crosshead D by a third connecting rod having a length of a third distance L3;

[0012] The second revolving pair B and the third revolving pair C are connected by a fourth connecting rod having a length of a fourth distance L4;

[0013] When the crosshead D is closed, the second link is collinear with the fourth link.

[0014] Furthermore, the calculation of the angular velocity of each rotary pair in each stroke segment using a geometric analysis method based on the geometric positional relationship between the rotary pairs includes:

[0015] According to the rotation speed V of the first rotary pair A A , the sliding speed V of the crosshead D D and the rotational speed V of the first rotary pair A relative to the crosshead D AD The rotation speed V of the first rotary pair is calculated by the trigonometric function correspondence A and the rotational speed V of the first rotary pair A relative to the crosshead D AD ;

[0016] According to the rotation speed V of the first rotary pair A A Calculate the angular velocity of the rotation center from the first distance L1 ;

[0017] According to the speed V of the first rotary pair A relative to the crosshead D AD The angular velocity of the crosshead D is calculated from the third distance L3. .

[0018] Furthermore, the rotation speed V of the first rotary pair is A , the sliding speed V of the crosshead D and the rotational speed V of the first revolving pair relative to the crosshead AD The corresponding relationship of the trigonometric functions is:

[0019] (1)

[0020] Among them, a is the angle between the second link's position during the mold closing process and the position at the end of mold closing, b is the angle between the third link and the horizontal line, c is the angle between the second link and the horizontal line at the end of mold closing, w is the fixed angle between the first link and the second link, and K1 is the characteristic value of the toggle mechanism.

[0021] Furthermore, the step of calculating the angular velocity of each revolving pair in each stroke segment using a geometric analysis method based on the geometric positional relationship between the revolving pairs further includes:

[0022] The rotation speed V of the second rotary pair is determined according to the geometric position correspondence between the second rotary pair B and the first rotary pair A. B ;

[0023] According to the rotation speed V of the second rotary pair B B and the rotation speed V of the second rotary pair B relative to the third rotary pair C BC The rotation speed V of the second rotary pair B relative to the third rotary pair C is calculated by the trigonometric function correspondence BC ;

[0024] According to the rotation speed V of the second rotary pair B relative to the third rotary pair C BC and the fourth distance L4 to calculate the angular velocity of the third rotary pair .

[0025] Furthermore, the rotation speed V of the second rotary pair B is B and the rotation speed V of the second rotary pair B relative to the third rotary pair C BC The corresponding relationship of the trigonometric functions is:

[0026] (5)

[0027] Among them, a1 is the angle between the fourth connecting rod and the horizontal line during the mold closing process.

[0028] Furthermore, the angular velocity of the first rotary pair A is is the angular velocity of the rotation center O and the angular velocity of the crosshead D sum;

[0029] The angular velocity of the second rotary pair B is the angular velocity of the third rotary pair C Angular velocity with respect to the rotation center O The negative value of the sum.

[0030] Furthermore, the cumulative calculation model of the interval power consumption is:

[0031] The power consumption of the rotary pair in the nth travel segment = (9)

[0032] in, P k is the force corresponding to the nth travel segment of the rotary pair, d is the rotary diameter of the rotary pair, μ is the friction coefficient of the rotary pair, k is the angular velocity of the rotary pair at the nth stroke segment, is pi, t The time used by the rotary pair in each stroke segment.

[0033] Furthermore, the force corresponding to each stroke segment of the rotary pair is an average value of the force corresponding to the starting point position of each stroke segment of the rotary pair and the force corresponding to the end point position of each stroke segment.

[0034] An embodiment of the present invention provides a device for determining the lubricating oil distribution ratio of a five-point inclined elbow-type clamping mechanism, the device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor;

[0035] When the computer program is executed by the processor, the steps of the method for determining the lubricating oil distribution ratio of the five-point oblique toggle clamping mechanism as described above are implemented.

[0036] Each embodiment of the present invention provides a method and device for determining the lubricant distribution ratio of a five-point oblique elbow clamping mechanism. During the crosshead mold closing process of the five-point oblique elbow clamping mechanism, the crosshead stroke is divided into a first number of stroke segments; based on the geometric positional relationship between the various rotary pairs, the angular velocity corresponding to each rotary pair in each stroke segment is calculated using a geometric analysis method; based on the angular velocity corresponding to each rotary pair in each stroke segment, a preset interval power consumption accumulation calculation model is used to obtain the accumulated power consumption of each rotary pair during the crosshead mold closing process; and the ratio of the accumulated power consumption of each rotary pair is calculated, and the ratio is used as the lubricant distribution ratio of each rotary pair in the five-point oblique elbow clamping mechanism. The present invention determines the accumulated power consumption ratio of each rotary pair during the mold closing process by analyzing the force or rotational speed of each rotary pair, and distributes lubricant to each rotary pair based on the accumulated power consumption ratio of each rotary pair, effectively avoiding the risk of over-lubrication or under-lubrication caused by adding equal amounts of lubricant to the rotary pairs.

[0037] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Various other advantages and benefits will become apparent to those skilled in the art by reading the detailed description of the preferred embodiment below. The accompanying drawings are only for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. In the accompanying drawings:

[0039] Figure 1 Schematic diagram of the structure of a five-point oblique elbow clamping mechanism according to an embodiment of the present invention;

[0040] Figure 2 Schematic diagram of a flow chart of a method for determining the lubricating oil distribution ratio of a five-point oblique toggle clamping mechanism according to an embodiment of the present invention;

[0041] Figure 3 Schematic diagram of the geometric position relationship between the various revolving pairs in an embodiment of the present invention;

[0042] Figure 4 Schematic diagram of the geometric position relationship between the various revolving pairs according to another embodiment of the present invention;

[0043] Figure 5 Schematic diagram of the speed correspondence of each rotary pair in an embodiment of the present invention.

[0044] Description of reference numerals:

[0045] A. First rotary pair; B. Second rotary pair; C. Third rotary pair; D. Crosshead; O. Center of rotation. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0047] It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units need not be limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatuses. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0048] Figure 1 The schematic diagram of the structure of the five-point oblique elbow clamping mechanism of the embodiment of the present invention is as follows: Figure 1 It can be seen that the five-point oblique elbow clamping mechanism includes a first rotary pair A, a second rotary pair B, a third rotary pair C, a crosshead D, and a rotary center O.

[0049] During the mold closing process, a horizontal force is applied to crosshead D, causing it to move horizontally along a fixed path. The first revolving pair A is connected to the rotation center O via the first connecting rod, and the second revolving pair B is connected to the rotation center O via the second connecting rod. The first and second revolving pairs A and B are connected via the fifth connecting rod. In other words, the first and second revolving pairs A and B, along with the rotation center O, form a triangle in space and rotate around the rotation center O. The crosshead D is connected to the first revolving pair A via the third connecting rod. As the crosshead D moves horizontally, this triangle, formed by the first and second revolving pairs A, B, and O, rotates around the rotation center O. The second and third revolving pairs B and C are connected via the fourth connecting rod. As the second revolving pair B rotates around the rotation center O, it pushes the second revolving pair B horizontally. When the second and fourth connecting rods form a straight line, the singularity point of the second revolving pair B is reached, and mold closing is complete.

[0050] The method for determining the lubricant distribution ratio for a five-point, oblique, toggle-type mold clamping mechanism provided in an embodiment of the present invention calculates the angular velocity change of each rotary pair during the mold clamping process based on the geometric position correspondence between the rotary pairs. The cumulative power consumption of each rotary pair is then calculated using a cumulative power consumption calculation model. Finally, the lubricant distribution ratio for each rotary pair is calculated based on the ratio of the cumulative power consumption of each rotary pair. The method for determining the lubricant distribution ratio for a five-point, oblique, toggle-type mold clamping mechanism according to an embodiment of the present invention is described in detail below.

[0051] Figure 2FIG. 1 is a flow chart of a method for determining the lubricating oil distribution ratio of a five-point inclined elbow clamping mechanism according to an embodiment of the present invention. Figure 2 It can be seen that the method for determining the lubricating oil distribution ratio of a five-point oblique toggle clamping mechanism provided by an embodiment of the present invention includes the following steps:

[0052] S1. During a mold closing process in which a crosshead of a five-point oblique toggle clamping mechanism deforms, the stroke of the crosshead is equally divided into a first number of stroke segments;

[0053] In an embodiment of the present invention, during the crosshead clamping process in which the five-point oblique elbow clamping mechanism is deformed, the stroke of the crosshead is equally divided into a first number of stroke segments under the condition that the maximum clamping force can be obtained.

[0054] S2. Calculate the angular velocity of each rotary pair in each stroke segment using a geometric analysis method based on the geometric positional relationship between the rotary pairs.

[0055] S3, obtaining the cumulative power consumption of each rotary pair during the crosshead mold clamping process according to the angular velocity corresponding to each rotary pair in each stroke segment using a preset interval power consumption accumulation calculation model;

[0056] S4. Calculate the ratio of the accumulated power consumption of each rotary pair, and use the ratio as the lubricating oil distribution ratio of each rotary pair of the five-point oblique toggle clamping mechanism.

[0057] For ease of understanding, the following Figure 3 The geometric position relationship between the various revolving pairs in the embodiment of the present invention is described in detail. Figure 3 is a schematic diagram of the geometric position relationship between the various revolving pairs in an embodiment of the present invention, Figure 3 It can be seen that the geometric positional relationship of each revolving pair in the embodiment of the present invention is specifically manifested as follows: the first revolving pair A, the second revolving pair B, and the revolving center O form a fixed triangle, and the fixed triangle rotates around the revolving center O; wherein, the first revolving pair A is connected to the revolving center O by a first connecting rod with a length of a first distance L1, and the second revolving pair B is connected to the revolving center O by a second connecting rod with a length of a second distance L2. In addition, the first revolving pair A is connected to the crosshead D by a third connecting rod with a length of a third distance L3; the second revolving pair B is connected to the third revolving pair C by a fourth connecting rod with a length of a fourth distance L4; when the crosshead D is fully molded, the second connecting rod and the fourth connecting rod are collinear.

[0058] It should be noted that in the figure, the crosshead moves along the horizontal trajectory l1, and the third rotary pair C moves along the horizontal trajectory l2. In the figure, the original capital letters of each rotary pair represent the initial position, for example, D represents the initial position of the crosshead, and the original capital letters plus the subscript "'" represent the position of each rotary pair at the end of mold closing, such as D' represents the position of the crosshead D at the end of mold closing. Among them, for the convenience of calculation, in the embodiment of the present invention, the speed of the crosshead D is set to a uniform speed of mold closing at a unit speed, that is, V D =1.

[0059] In order to facilitate the subsequent understanding of each rotational auxiliary angular velocity, the following is combined with the attached Figure 4 Various angles of each rotary pair during the mold closing process in the embodiment of the present invention are introduced in detail. Figure 4 FIG. 1 is a schematic diagram of the geometric position relationship between the various revolving pairs according to another embodiment of the present invention. Figure 4 The position of each rotary pair in Figure 3 The positions in the image correspond to each other. In order to keep the image clear, Figure 4 The individual rotary pairs are not marked in this document. For specific rotary pair markings, see Figure 3 .exist Figure 4 where a is the angle between the second connecting rod during mold closing and its position at the end of mold closing, b is the angle between the third connecting rod and the horizontal line, c is the angle between the second connecting rod and the horizontal line at the end of mold closing, w is the fixed angle between the first connecting rod and the second connecting rod, K1 is the proportional coefficient, and a1 is the angle between the fourth connecting rod and the horizontal line during mold closing.

[0060] The following describes in detail the method for determining the lubricating oil distribution ratio of the five-point oblique toggle clamping mechanism according to an embodiment of the present invention, in combination with the geometric relationship between the above-mentioned rotary pairs and the specific angles marked:

[0061] First, in step S2 of the embodiment of the present invention, the angular velocity of each rotary pair corresponding to each stroke segment is calculated using a geometric analysis method according to the geometric position relationship between the rotary pairs, including: according to the rotation speed V of the first rotary pair A A , the sliding speed V of the crosshead D D and the rotational speed V of the first rotary pair A relative to the crosshead D AD The rotation speed V of the first rotary pair is calculated by the trigonometric function correspondence A and the rotational speed V of the first rotary pair A relative to the crosshead D AD According to the rotation speed V of the first rotary pair A A Calculate the angular velocity of the rotation center from the first distance L1 According to the speed V of the first rotary pair A relative to the crosshead D ADThe angular velocity of the crosshead D is calculated from the third distance L3. .

[0062] Reference Figure 4 , the first revolving pair A rotates around the rotation center O with the first connecting rod, so V A Perpendicular to the first link, the speed V of the crosshead D D The direction of motion is along the horizontal trajectory l1, and the speed of the first rotary pair A relative to the crosshead D is V AD It is perpendicular to the third link. As can be seen from the figure, V A With V AD The angle between the third link and the first link is equal to the angle between the third link and the first link. The angle between the third link and the first link can be expressed as the sum of the angle between the first link and the horizontal line and the angle between the third link and the horizontal line. The angle between the first link and the horizontal line can also be expressed as the angle between the second link and the horizontal line minus the fixed angle w between the first link and the second link. Finally, according to the corresponding angle and parallel relationship, V can be derived. A With V AD The angle can be expressed as a+c+K1×w+b, where K1 is 1 when the toggle lever has a positive backlash angle and -1 when the toggle lever has a negative backlash angle. AD With V D The angle between (at this time, the direction of the velocity does not need to be considered, only the corresponding angle in the corresponding velocity triangle is considered to determine the velocity) and V AD The angles with the horizontal are equal, and V AD The angle with the horizontal line is equal to 90°-b. A With V D The angle between them is equal to V A The angle with the horizontal line is equal to 90° minus the angle between the second link and the horizontal line, that is, 90°-(a+c+K1×w).

[0063] Furthermore, through the above analysis, it can be seen that the rotation speed V of the first rotary pair A , the sliding speed V of the crosshead D D and the rotational speed V of the first rotary pair relative to the crosshead D AD The corresponding relationship of the trigonometric functions is:

[0064] (1)

[0065] Among them, a is the angle between the second link's position during the mold closing process and the position at the end of mold closing, b is the angle between the third link and the horizontal line, c is the angle between the second link and the horizontal line at the end of mold closing, w is the fixed angle between the first link and the second link, K1 is the characteristic value of the toggle mechanism, K1 is 1 when the toggle has a positive clearance angle, and K1 is -1 when the toggle has a negative clearance angle.

[0066] Since V in formula (1) D If it is a known quantity, the rotation speed V of the first rotary pair A can be calculated according to formula 1: A and the rotational speed V of the first rotary pair A relative to the crosshead D AD ;

[0067] Furthermore, since the first revolving pair A rotates around the revolving center O, the distance between the first revolving pair and the revolving center is the first distance L1 of the first connecting rod. According to the angular velocity calculation formula, it can be known that the rotation speed V of the first revolving pair A can be calculated based on the rotation speed V of the first revolving pair A. A Calculate the angular velocity of the rotation center from the first distance L1 :

[0068] (2)

[0069] Furthermore, according to the speed V of the first rotary pair A relative to the crosshead D AD The angular velocity of the crosshead D is calculated from the third distance L3. Specifically:

[0070] (3)

[0071] Furthermore, in the embodiment of the present invention, the angular velocity of each rotary pair in each stroke segment is calculated using a geometric analysis method based on the geometric position relationship between the rotary pairs, and further includes: determining the rotational velocity V of the second rotary pair according to the geometric position correspondence between the second rotary pair B and the first rotary pair A. B According to the rotation speed V of the second rotary pair B B and the rotation speed V of the second rotary pair B relative to the third rotary pair C BC The rotation speed V of the second rotary pair B relative to the third rotary pair C is calculated by the trigonometric function correspondence BC According to the rotation speed V of the second rotary pair B relative to the third rotary pair C BC and the fourth distance L4 to calculate the angular velocity of the third rotary pair .

[0072] The geometric position correspondence between the second rotary pair B and the first rotary pair A determines the rotation speed V of the second rotary pair. B Specifically, since the rotational angular velocity of the first revolving pair A and the second revolving pair B around the rotation center is the same, according to the ratio of the rotational angular velocity to the rotational radius, the rotational velocity V of the second revolving pair can be obtained by simple deduction. B for:

[0073] (4)

[0074] Further, refer to Figure 4 , the rotation speed V of the second rotary pair B B Perpendicular to the second connecting rod, the rotation speed V of the second revolving pair B relative to the third revolving pair C BC It is perpendicular to the fourth link. B and V BC The angle between them is equal to 180°-(a+c)-90°, that is, 90°-(a+c), V C With V BC The angle between the fourth link and the horizontal line is 90°-a1, where a1 is the angle between the fourth link and the horizontal line during the mold closing process. Therefore, the rotation speed V of the second rotary pair B is deduced through the geometric relationship. B and the rotation speed V of the second rotary pair B relative to the third rotary pair C BC The corresponding relationship of the trigonometric functions is:

[0075] (5)

[0076] Furthermore, according to the rotation speed V of the second rotary pair B relative to the third rotary pair C BC and the fourth distance L4 to calculate the angular velocity of the third rotary pair Specifically:

[0077] (6)

[0078] Furthermore, according to the geometric position relationship between the various revolving pairs in the embodiment of the present invention, the angular velocity of the first revolving pair A can also be determined. is the angular velocity of the rotation center O and the angular velocity of the crosshead D The angular velocity of the second rotary pair B is the angular velocity of the third rotary pair C Angular velocity with respect to the rotation center O The negative value of the sum. Using the above geometric position relationship, the angular velocity of the first rotary pair A can be determined and the angular velocity of the second rotary pair B :

[0079] (7)

[0080] (8)

[0081] Furthermore, the cumulative calculation model of the interval power consumption in the embodiment of the present invention is:

[0082] The power consumption of the rotary pair in the nth travel segment = (9)

[0083] in, P k is the force corresponding to the nth travel segment of the rotary pair, d is the rotary diameter of the rotary pair, μ is the friction coefficient of the rotary pair, k is the angular velocity of the rotary pair at the nth stroke segment, is pi, t is the time taken by the rotary pair in each stroke segment, and the value range of k is 1~the first number.

[0084] Furthermore, the power consumption of the mold closing stroke within a cycle can be calculated using the above formula (9). The power consumption ratio of the mold closing stroke within each rotary sub-cycle is the oil distribution ratio of the elbow lubrication point.

[0085] Furthermore, in an embodiment of the present invention, the force corresponding to the rotary pair in each stroke segment is the average value of the force corresponding to the starting position of the rotary pair in each stroke segment and the force corresponding to the end position of each stroke segment. Since the calculation of this force is the existing technology in this field and is well known in the industry, the present invention will not go into details about it.

[0086] Furthermore, in the embodiment of the present invention, the lubricating oil distribution ratio of each rotary pair of the five-point oblique toggle clamping mechanism is specifically expressed as follows:

[0087] (10)

[0088] Where W O is the cumulative power consumption of the rotation center O, W A is the cumulative power consumption of the first rotary pair A, W B is the cumulative power consumption of the second rotary pair B, W C is the cumulative power consumption of the third rotary pair C, W D is the cumulative power consumption of crosshead D, is the angular velocity of the rotation center O in each stroke segment, and so on. is the angular velocity of the crosshead D in each stroke segment. Since the gyration radius of each gyration pair is reduced in the above embodiment, the gyration diameter is twice the gyration radius, which will not be described in detail here.

[0089] Furthermore, by eliminating identical terms in the above formula, we can obtain the final lubricant distribution ratio for each rotary pair in the five-point oblique toggle clamping mechanism. In practical applications, adding lubricant according to the lubricant distribution ratio for each rotary pair can effectively avoid the risk of over-lubrication or under-lubrication caused by adding equal amounts of lubricant to each rotary pair. Because insufficient lubricant can cause wear, the embodiments of the present invention extend the service life of the five-point oblique toggle clamping mechanism by adding an appropriate amount of lubricant to each rotary pair, effectively preventing wear of the rotary pairs.

[0090] In addition, an embodiment of the present invention further provides a device for determining the lubricating oil distribution ratio of a five-point oblique elbow-type clamping mechanism, the device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor;

[0091] When the computer program is executed by the processor, the steps of calculating the lubricating oil distribution ratio of the five-point oblique toggle clamping mechanism as described in the above embodiments are implemented.

[0092] The present invention discloses a method and device for determining the lubricant distribution ratio of a five-point oblique elbow-type mold clamping mechanism. The method comprises: during the process of uniformly closing the mold at a unit speed with a deformed crosshead of the five-point oblique elbow-type mold clamping mechanism, the crosshead stroke is equally divided into a first number of stroke segments; based on the geometric positional relationship between the various rotary pairs, the angular velocity corresponding to each rotary pair in each stroke segment is calculated using a geometric analysis method; based on the angular velocity corresponding to each rotary pair in each stroke segment, the cumulative power consumption of each rotary pair during the crosshead mold closing process is obtained using a preset interval power consumption accumulation calculation model; and the ratio of the cumulative power consumption of each rotary pair is calculated, and the ratio is used as the lubricant distribution ratio for each rotary pair of the five-point oblique elbow-type mold clamping mechanism. The present invention effectively avoids the risk of over-lubrication or under-lubrication caused by adding equal amounts of lubricant to the rotary pairs.

[0093] Those skilled in the art will appreciate that although some embodiments herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is intended to be within the scope of the present invention and to form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for determining the lubricating oil distribution ratio of a five-point inclined elbow clamping mechanism, characterized in that: The method comprises: During the process of uniformly closing the mold at a unit speed, the crosshead D of the five-point oblique toggle clamping mechanism undergoing deformation is divided into a first number of travel segments; According to the geometric position relationship between each rotary pair, the angular velocity of each rotary pair in each stroke segment is calculated using the geometric analysis method; Obtaining the accumulated power consumption of each rotary pair during the mold clamping process of the crosshead D according to the angular velocity corresponding to each rotary pair in each stroke segment using a preset interval power consumption accumulation calculation model; The ratio of the accumulated power consumption of each rotary pair is calculated, and the ratio is used as the lubricating oil distribution ratio of each rotary pair of the five-point oblique elbow clamping mechanism.

2. The method according to claim 1, characterized in that The five-point oblique elbow clamping mechanism includes a first rotary pair A, a second rotary pair B, a third rotary pair C, a crosshead D, and a rotary center O. The geometric positional relationships between the rotary pairs include: The first revolving pair A, the second revolving pair B, and the revolving center O form a fixed triangle, and the fixed triangle rotates around the revolving center O; wherein the first revolving pair A is connected to the revolving center O by a first connecting rod with a first length L1, and the second revolving pair B is connected to the revolving center O by a second connecting rod with a second length L2; The first rotary pair A is connected to the crosshead D by a third connecting rod having a length of a third distance L3; The second revolving pair B and the third revolving pair C are connected by a fourth connecting rod having a length of a fourth distance L4; When the crosshead D is closed, the second link is collinear with the fourth link.

3. The method according to claim 2, characterized in that The calculation of the angular velocity of each rotary pair in each stroke segment using a geometric analysis method based on the geometric position relationship between the rotary pairs includes: According to the rotation speed V of the first rotary pair A A , the sliding speed V of the crosshead D D and the rotational speed V of the first rotary pair A relative to the crosshead D AD The rotation speed V of the first rotary pair is calculated by the trigonometric function correspondence A and the rotational speed V of the first rotary pair A relative to the crosshead D AD ; According to the rotation speed V of the first rotary pair A A Calculate the angular velocity of the rotation center from the first distance L1 ; According to the speed V of the first rotary pair A relative to the crosshead D AD The angular velocity of the crosshead D is calculated from the third distance L3. .

4. The method according to claim 3, characterized in that The rotation speed V of the first rotary pair A , the sliding speed V of the crosshead D D and the rotational speed V of the first rotary pair relative to the crosshead D AD The corresponding relationship of the trigonometric functions is: （1） Among them, a is the angle between the second link's position during the mold closing process and the position at the end of mold closing, b is the angle between the third link and the horizontal line, c is the angle between the second link and the horizontal line at the end of mold closing, w is the fixed angle between the first link and the second link, and K1 is the characteristic value of the toggle mechanism.

5. The method according to claim 3, characterized in that The method of calculating the angular velocity of each rotary pair in each stroke segment using a geometric analysis method based on the geometric position relationship between the rotary pairs also includes: The rotation speed V of the second rotary pair is determined according to the geometric position correspondence between the second rotary pair B and the first rotary pair A. B ; According to the rotation speed V of the second rotary pair B B and the rotation speed V of the second rotary pair B relative to the third rotary pair C BC The rotation speed V of the second rotary pair B relative to the third rotary pair C is calculated by the trigonometric function correspondence BC ; According to the rotation speed V of the second rotary pair B relative to the third rotary pair C BC and the fourth distance L4 to calculate the angular velocity of the third rotary pair .

6. The method according to claim 5, characterized in that The rotation speed V of the second rotary pair B B , the speed V of the third rotary pair C C and the rotation speed V of the second rotary pair B relative to the third rotary pair C BC The corresponding relationship of the trigonometric functions is: （5） Among them, a1 is the angle between the fourth connecting rod and the horizontal line during the mold closing process.

7. The method according to claim 5, characterized in that The angular velocity of the first rotary pair A is the angular velocity of the rotation center O and the angular velocity of the crosshead D sum; The angular velocity of the second rotary pair B is the angular velocity of the third rotary pair C Angular velocity with respect to the rotation center O The negative value of the sum.

8. The method according to claim 1, characterized in that The cumulative calculation model of the power consumption in the interval is: （9） in, P k is the force corresponding to the kth travel segment of the rotary pair, d is the rotary diameter of the rotary pair, μ is the friction coefficient of the rotary pair, k is the angular velocity of the rotary pair corresponding to the kth stroke segment, is pi, t The time used by the rotary pair in each stroke segment.

9. The method according to claim 8, characterized in that The force corresponding to each stroke segment of the rotary pair is the average value of the force corresponding to the starting point position of each stroke segment and the force corresponding to the end point position of each stroke segment.

10. A device for determining the lubricating oil distribution ratio of a five-point inclined elbow-type clamping mechanism, characterized in that: The apparatus comprises a memory, a processor, and a computer program stored on the memory and executable on the processor; When the computer program is executed by the processor, the steps of the method for determining the lubricating oil distribution ratio of the five-point oblique toggle clamping mechanism according to any one of claims 1 to 9 are implemented.

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