Feeding Pressure Head Based on Steel Ball Spring and Feeding Method

Abstract

The present invention relates to a material-feeding pressing head based on a steel ball spring, which comprises a material-feeding fixator and a guiding material picker; the material-feeding fixator comprises an equipment connection module and a guiding material picker connection module; the inner wall of the lower end of the guiding material picker connection module is provided with a steel ball limiting R angle; the radius of the seat ring limiting the steel ball matches the radian of the steel ball limiting R angle, and after the guiding material picker shaft body is detachably connected to the guiding material picker connection hole, it is axially offset outward by an axial offset amount and radially offset inward by a radial offset amount along the axial center. The present invention also relates to a material-feeding method: inserting a press-fitting guiding reference shaft into the inner hole of the material channel of the seat ring to be press-fitted; the seat ring to be press-fitted extrudes the seat ring limiting the steel ball to achieve material feeding; moving to the press-fitting position coordinates; extruding into the seat ring hole of the part; the present invention has universality and improves production efficiency; the material-feeding process is stable and the rotational joint fit is high, avoiding material jamming and material dropping; avoiding large bending movements and eliminating hand injuries.

Description

Technical Field

[0001] The present invention relates to the field of seat ring press-fitting, and particularly to a feeding press head and a feeding method based on a steel ball spring. Background Art

[0002] Press-fitting equipment is a commonly used equipment in automobile production, and its function is to press-fit workpieces to corresponding positions; the feeding process is inevitable in the press-fitting process.

[0003] For the feeding process of press-fitting, the existing seat ring press heads generally have two structures: a magnet press head structure and a lever press head structure; specifically:

[0004] As Figure 1 shown, the magnet press head structure uses the method of magnet adsorption to feed the seat ring, and relies on the tight fit between the seat ring and the cylinder head to disengage.

[0005] The defect of the magnet press head structure is that due to the unreliable magnetic adsorption effect, the powder processed by the magnet adsorbing the cylinder head causes the seat ring of the rotary material press head not to be adsorbed in place, forming a potential hazard to the press-fitting quality.

[0006] This problem becomes more serious after the industrial upgrade of many automobile enterprises, when a new specification of seat ring is newly adopted; this is because the new seat ring is made of powder metallurgy material, and the original press head cannot meet the requirement, so a new set of press heads is needed, resulting in waste of press head changeover and low production efficiency; this further leads to the quality risk of seat ring press-fitting fracture and unqualified products flowing out during the press-fitting process; there are also safety risks such as bumps and scratches for personnel during the changeover process.

[0007] As Figure 2 shown, the mechanical lever chuck uses spring tension for feeding;

[0008] The defect of the mechanical lever chuck is that due to the fact that the press-fitting surface of the press head bears a press-fitting force of 2 tons, the mechanical lever joint surface gets stuck, forming a potential hazard that the press-fitting press head cannot be rotated and connected to the positioning equipment.

[0009] In addition, when the applicant uses the existing press head for feeding, the following problems also occur:

[0010] 1. At the seat ring press-fitting station of the applicant's L cylinder head line OP100A, when press-fitting the intake and exhaust seat rings of the cylinder head, since the press-fitting method of the equipment uses an oil cylinder actuator to press-fit in place, and at the same time, because the seat ring needs to be rotated before press-fitting, abnormal equipment failures occur during the rotation process, resulting in an increase in abnormal production costs; these abnormal failures include but are not limited to problems such as OEE, equipment operating rate not meeting the standard, and an increase in cylinder head part scrap.

[0011] 2. Due to the above-mentioned faults, the quality control work of seat ring pressing requires temporary measures to increase the inspection frequency manually to maintain the production of the PPK data of the quality, further increasing the labor cost.

[0012] 3. The abnormal detachment during the seat ring pressing process of the equipment causes the problem of seat ring pressing fracture; this problem has existed and troubled the production line for many years until the application of the present invention. Summary of the Invention

[0013] The present invention aims at the above problems and provides a feeding press head and a feeding method based on a steel ball spring, which are universal, improve production efficiency; the feeding process is stable and the joint fit is high, avoiding material jamming and material dropping; avoiding large bending movements and preventing hand injuries.

[0014] To solve the above problems, the technical solution provided by the present invention is as follows:

[0015] A feeding press head based on a steel ball spring includes a feeding fixture for connecting a press and a guiding feeder for pressing a seat ring; wherein:

[0016] The feeding fixture includes an equipment connection module and a guiding feeder connection module; wherein:

[0017] The equipment connection module is a cylinder, and its outer shape matches the inner shape of the equipment installation hole of the press, and includes a guiding connection shaft, a press head floating limit slot and an upper shaft diameter of the press head; wherein:

[0018] The guiding connection shaft is a cylinder, and its upper end is fixedly connected to the lower end of the press head floating limit slot; the press head floating limit slot is a cylinder, and its upper end is fixedly connected to the lower end of the upper shaft diameter of the press head; the outer shape of the press head floating limit slot matches the inner shape of the tenon in the equipment installation hole of the press; the upper shaft diameter of the press head is a cylinder.

[0019] The guiding feeder connection module is a hollow cylindrical structure with a closed upper end and an open lower end; the upper outer end of the guiding feeder connection module is a machine tool pressing joint surface; the machine tool pressing joint surface is fixedly connected to the lower end of the guiding connection shaft.

[0020] The inner cavity of the guiding feeder connection module forms a guiding feeder connection hole; the outer wall of the lower end of the guiding feeder connection module is provided with a seat ring pressing reference surface; the shape of the seat ring pressing reference surface matches the inner shape of the seat ring to be pressed; the inner wall of the lower end of the guiding feeder connection module is provided with a steel ball limit R angle for restricting the displacement of the seat ring limit steel ball; the steel ball limit R angle is an inner concave circular arc structure along the inner wall opening of the lower end of the guiding feeder connection module.

[0021] The symmetry axes of the guiding connecting shaft, the indenter floating limit card slot, the upper shaft diameter of the indenter, and the guiding feeder connection module are collinear;

[0022] The guiding feeder includes a guiding feeder shaft body, a press-fitting guiding reference shaft, the seat ring limiting steel balls, and a seat ring limiting compression spring; where:

[0023] The guiding feeder shaft body is a cylinder, and its outer shape matches the inner shape of the guiding feeder connection hole;

[0024] The guiding feeder shaft body is provided with a plurality of steel ball limiting holes near the lower end; the steel ball limiting holes are non-through blind tubes and pass through the radius of the guiding feeder shaft body; the diameter of the steel ball limiting holes matches the diameter of the seat ring limiting steel balls; the diameter of the seat ring limiting compression spring matches the diameter of the steel ball limiting holes and is inserted into the bottom of the steel ball limiting holes;

[0025] The seat ring limiting steel balls are movably placed at the mouths of the steel ball limiting holes and are movably connected to the seat ring limiting compression spring;

[0026] The press-fitting guiding reference shaft is a cylinder, and its upper end is fixedly connected to the lower end of the guiding feeder shaft body; the symmetry axes of the press-fitting guiding reference shaft and the guiding feeder shaft body are collinear;

[0027] The guiding feeder shaft body is inserted into the guiding feeder connection hole along the symmetry axis; the guiding feeder shaft body is detachably connected to the guiding feeder connection hole;

[0028] The radius of the seat ring limiting steel balls matches the radian of the steel ball limiting R angle, and after the guiding feeder shaft body is detachably connected to the guiding feeder connection hole, it is axially offset outward by an axial offset amount and radially offset inward by a radial offset amount along the axial center.

[0029] Preferably, the axial offset amount is 0.15 mm; the radial offset amount is 0.25 mm.

[0030] Preferably, the guiding feeder shaft body and the guiding feeder connection hole are detachably connected through a limit spring pin of the indenter assembly; specifically:

[0031] The guiding feeder connection module is provided with two spring pin limiting holes between the upper end and the seat ring press-fitting reference surface; the two spring pin limiting holes penetrate the side wall of the guiding feeder connection module and pass through the diameter of the guiding feeder connection module;

[0032] The guiding material-taking shaft body is provided with a spring pin connection hole near the upper end; the spring pin connection hole penetrates through the guiding material-taking shaft body and passes through the diameter of the guiding material-taking shaft body; the diameter of the spring pin connection hole is matched with the outer diameter of the pressing head assembly connecting the limiting spring pin;

[0033] After the guiding material-taking shaft body is inserted into the guiding material-taking device connection hole along the symmetry axis, the pressing head assembly connecting the limiting spring pin sequentially passes through the spring pin limiting hole on one side, the spring pin connection hole, and the spring pin limiting hole on the other side to realize detachable connection;

[0034] The pressing head assembly connecting the limiting spring pin has an interference fit with both the spring pin limiting hole and the spring pin connection hole.

[0035] Preferably, 4 steel ball limiting holes are provided on the guiding material-taking shaft body; the 4 steel ball limiting holes are symmetrically distributed about the symmetry axis of the guiding material-taking shaft body; 1 seat ring limiting steel ball and 1 seat ring limiting compression spring are installed in each steel ball limiting hole.

[0036] Preferably, the lower end of the press-fitting guiding reference shaft is provided with a guiding connection shaft surface; the guiding connection shaft surface is conical and the top is flat.

[0037] Preferably, at the fixed connection of the guiding material-taking shaft body and the press-fitting guiding reference shaft, there is a seat ring guiding surface; the seat ring guiding surface is a circle of inclined surfaces uniformly distributed along the lower edge of the guiding material-taking shaft body.

[0038] A material-taking method using a material-taking press head based on a steel ball spring includes the following steps:

[0039] S100. The press-fitting guiding reference shaft is vertically inserted into the inner hole of the material channel of the to-be-press-fitted seat ring through the guiding connection shaft surface for positioning;

[0040] S200. The material-taking press head continues to move downward until the chamfer of the to-be-press-fitted seat ring contacts the seat ring guiding surface;

[0041] S300. The inner ring of the to-be-press-fitted seat ring squeezes the seat ring limiting steel ball, and the seat ring limiting steel ball further squeezes the seat ring limiting compression spring and retracts into the steel ball limiting hole, and clamps the to-be-press-fitted seat ring by relying on the reaction force provided by the seat ring limiting compression spring to realize material-taking;

[0042] S400. After the material-taking press head realizes material-taking, it withdraws from the inner hole of the material channel of the to-be-press-fitted seat ring and exits the seat ring material channel area, and then carries the to-be-press-fitted seat ring and moves to the press-fitting position coordinates through servo positioning;

[0043] S500. The feeding punch presses down, squeezing the to-be-pressed seat ring into the seat ring hole of the part; under the extrusion force of tight fit with the seat ring hole, the to-be-pressed seat ring disengages from the feeding punch, completing the seat ring pressing work;

[0044] S600. Repeat S100 - S500 until all seat ring pressing work is completed.

[0045] Compared with the prior art, the present invention has the following advantages:

[0046] 1. Since the present invention adopts the "steel ball + spring" feeding mode, it solves at one stroke the pain points of the prior art, whether it is the magnet type or the lever type punch, making the punch universal. On the premise of meeting the use of various seat ring pressings without the need for type change, it shortens the type change time and improves production efficiency;

[0047] 2. Since the present invention adopts the structure of the steel ball limiting R angle, combined with the tightening force of the steel ball, the seat ring feeding process can be smooth and the rotational connection fit degree is high, fundamentally avoiding quality problems such as material jamming and material dropping during seat ring feeding, and the pressing quality percentage is qualified and the quality is reliable;

[0048] 3. Since the present invention eliminates the frequency of punch replacement, it eliminates the risks of slipping and falling caused by maintenance personnel entering the equipment multiple times. Thus, it effectively avoids the large bending movements caused by maintenance workers frequently replacing and adjusting punch spare parts for a long time, and there is no need to deal with potential faults due to the need for hands to enter a narrow space, and therefore eliminates the hand injuries caused thereby, is more in line with ergonomics, avoids the hand injury risks caused by disassembling and replacing punch spare parts, and is safer. Description of the Drawings

[0049] Figure 1 is the appearance photo of the magnet punch of the prior art;

[0050] Figure 2 is the appearance photo of the lever punch of the prior art;

[0051] Figure 3 is the appearance photo of the present invention;

[0052] Figure 4 is the longitudinal sectional schematic view of the punch assembly of the specific embodiment of the present invention;

[0053] Figure 5 is the longitudinal sectional schematic view of the feeding fixer of the specific embodiment of the present invention;

[0054] Figure 6 is the longitudinal sectional schematic view of the guiding material taker of the specific embodiment of the present invention;

[0055] Figure 7Schematic diagram of the seat ring limiting steel ball in a specific embodiment of the present invention;

[0056] Figure 8 Schematic diagram of the seat ring limiting compression spring in a specific embodiment of the present invention;

[0057] Figure 9 is Figure 4 Enlarged schematic diagram of a part in circle A;

[0058] Figure 10 Longitudinal sectional schematic diagram of the connection limiting spring pin of the punch assembly in a specific embodiment of the present invention;

[0059] Figure 11 Flow schematic diagram of the material feeding method in a specific embodiment of the present invention.

[0060] Wherein: 1. Material feeding fixator, 2. Guided material picker, 3. Seat ring to be press-fitted, 4. Equipment connection module, 5. Guided material picker connection module, 6. Guided connection shaft, 7. Punch floating limit card slot, 8. Upper shaft diameter of the punch, 9. Machine tool press-fitting joint surface, 10. Guided material picker connection hole, 11. Seat ring press-fitting reference surface, 12. Seat ring limiting steel ball, 13. Steel ball limit R corner, 14. Body of the guided material picker shaft, 15. Press-fitting guiding reference shaft, 16. Seat ring limiting compression spring, 17. Steel ball limit hole, 18. Axial offset, 19. Radial offset, 20. Connection limiting spring pin of the punch assembly, 21. Spring pin limit hole, 22. Spring pin connection hole, 23. Guided connection shaft surface, 24. Seat ring guiding surface. Detailed implementation manners

[0061] The following further clarifies the present invention in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, various equivalent modifications made by those skilled in the art fall within the scope defined by the appended claims of this application.

[0062] As Figure 3 and Figure 4 shown, a material feeding punch based on a steel ball spring includes a material feeding fixator 1 for connecting to a press and a guided material picker 2 for press-fitting a seat ring; wherein:

[0063] As Figure 5 shown, the material feeding fixator 1 includes an equipment connection module 4 and a guided material picker connection module 5; wherein:

[0064] The equipment connection module 4 is a cylinder, and its outer shape matches the inner shape of the equipment installation hole of the press. It includes a guided connection shaft 6, a punch floating limit card slot 7, and an upper shaft diameter 8 of the punch; wherein:

[0065] The guiding connecting shaft 6 is a cylinder, and its upper end is fixedly connected to the lower end of the floating limit slot 7 of the punch head; the floating limit slot 7 of the punch head is a cylinder, and its upper end is fixedly connected to the lower end of the upper shaft diameter 8 of the punch head; the outer shape of the floating limit slot 7 of the punch head matches the internal shape of the tenon in the equipment installation hole of the press-fitting machine; the upper shaft diameter 8 of the punch head is a cylinder;

[0066] The guiding material-taking device connecting module 5 is a hollow cylindrical structure with a closed upper end and an open lower end; the upper outer part of the guiding material-taking device connecting module 5 is the machine tool press-fitting joint surface 9; the machine tool press-fitting joint surface 9 is fixedly connected to the lower end of the guiding connecting shaft 6.

[0067] The internal cavity of the guiding material-taking device connecting module 5 forms a guiding material-taking device connecting hole 10; the outer wall at the lower end of the guiding material-taking device connecting module 5 is provided with a seat ring press-fitting reference surface 11; the shape of the seat ring press-fitting reference surface 11 matches the internal shape of the seat ring 3 to be press-fitted; the inner wall at the lower end of the guiding material-taking device connecting module 5 is provided with a steel ball limit R angle 13 for restricting the displacement of the seat ring limiting steel ball 12; the steel ball limit R angle 13 is an inner concave circular arc-shaped structure along the inner wall mouth of the lower end of the guiding material-taking device connecting module 5;

[0068] The symmetry axes of the guiding connecting shaft 6, the floating limit slot 7 of the punch head, the upper shaft diameter 8 of the punch head, and the guiding material-taking device connecting module 5 are collinear.

[0069] As Figure 6 shown, the guiding material-taking device 2 includes a guiding material-taking shaft body 14, a press-fitting guiding reference shaft 15, a seat ring limiting steel ball 12, and a seat ring limiting compression spring 16; among them:

[0070] The guiding material-taking shaft body 14 is a cylinder, and its outer shape matches the internal shape of the guiding material-taking device connecting hole 10;

[0071] As Figures 7 to 9 shown, the guiding material-taking shaft body 14 is provided with a plurality of steel ball limit holes 17 near the lower end; the steel ball limit holes 17 are non-through blind tubes and pass through the radius of the guiding material-taking shaft body 14; the diameter of the steel ball limit holes 17 is matched with the diameter of the seat ring limiting steel ball 12; the diameter of the seat ring limiting compression spring 16 is matched with the diameter of the steel ball limit holes 17 and is inserted into the bottom of the steel ball limit holes 17.

[0072] The seat ring limiting steel ball 12 is movably placed at the mouth of the steel ball limit hole 17 and is movably connected to the seat ring limiting compression spring 16.

[0073] In this specific embodiment, the guiding material-taking shaft body 14 is provided with 4 steel ball limit holes 17; the 4 steel ball limit holes 17 are symmetrically distributed about the symmetry axis of the guiding material-taking shaft body 14; each steel ball limit hole 17 is installed with 1 seat ring limiting steel ball 12 and 1 seat ring limiting compression spring 16.

[0074] The press-fitting guiding reference shaft 15 is a cylinder, and its upper end is fixedly connected to the lower end of the guiding material-taking shaft body 14; the symmetry axes of the press-fitting guiding reference shaft 15 and the guiding material-taking shaft body 14 are collinear.

[0075] In this specific embodiment, the lower end of the press-fitting guiding reference shaft 15 is provided with a guiding connecting shaft surface 23; the guiding connecting shaft surface 23 is conical, and its top is a plane.

[0076] The guiding material-taking shaft body 14 is inserted into the guiding material-taking device connection hole 10 along the symmetry axis; the guiding material-taking shaft body 14 is detachably connected to the guiding material-taking device connection hole 10.

[0077] In this specific embodiment, at the fixed connection of the guiding material-taking shaft body 14 and the press-fitting guiding reference shaft 15, there is a seat ring guiding surface 24; the seat ring guiding surface 24 is a circle of inclined surfaces evenly distributed along the lower edge of the guiding material-taking shaft body 14.

[0078] As Figure 10 shown, in this specific embodiment, the guiding material-taking shaft body 14 and the guiding material-taking device connection hole 10 are detachably connected through the press head assembly connecting limit spring pin 20; specifically:

[0079] The guiding material-taking device connection module 5 is provided with two spring pin limit holes 21 between the upper end and the seat ring press-fitting reference surface 11; the two spring pin limit holes 21 penetrate through the side wall of the guiding material-taking device connection module 5 and pass through the diameter of the guiding material-taking device connection module 5.

[0080] The guiding material-taking shaft body 14 is provided with a spring pin connection hole 22 near the upper end; the spring pin connection hole 22 penetrates through the guiding material-taking shaft body 14 and passes through the diameter of the guiding material-taking shaft body 14; the diameter of the spring pin connection hole 22 is matched with the outer diameter of the press head assembly connecting limit spring pin 20.

[0081] After the guiding material-taking shaft body 14 is inserted into the guiding material-taking device connection hole 10 along the symmetry axis, the press head assembly connecting limit spring pin 20 sequentially passes through the spring pin limit hole 21 on one side, the spring pin connection hole 22, and the spring pin limit hole 21 on the other side to achieve detachable connection.

[0082] The press head assembly connecting limit spring pin 20 has an interference fit with both the spring pin limit hole 21 and the spring pin connection hole 22.

[0083] The radius of the seat ring limit steel ball 12 is matched with the radian of the steel ball limit R angle 13, and after the guiding material-taking shaft body 14 and the guiding material-taking device connection hole 10 are detachably connected, it axially offsets outward by an axial offset amount 18 and radially offsets inward by a radial offset amount 19 along the axial center.

[0084] In this specific embodiment, the axial offset 18 is 0.15 mm; the radial offset 19 is 0.25 mm.

[0085] It should be noted that the values of the axial offset 18 and the radial offset 19 are one of the core invention points of the present invention. Specifically, these two values are the results of a large number of experimental verifications. Only by adopting such axial offset 18 and radial offset 19 can the smoothness of the material gripping, the stability during material transfer, and the smooth release after press-fitting be guaranteed.

[0086] like Figure 11 As shown, a material picking method using a material picking pressure head based on a steel ball spring comprises the following steps:

[0087] S100. The press-fitting guide reference shaft 15 is inserted vertically into the inner hole of the material channel of the seat ring 3 to be press-fitted by guiding the connecting shaft surface 23 for positioning.

[0088] S200. The material-grabbing pressing head continues to move downward until the chamfer of the seat ring 3 to be pressed into contact with the seat ring guide surface 24.

[0089] S300. The inner ring of the seat ring 3 to be pressed into place squeezes the seat ring limiting steel ball 12, and the seat ring limiting steel ball 12 then squeezes the seat ring limiting compression spring 16 and retracts into the steel ball limiting hole 17, and relies on the reaction force provided by the seat ring limiting compression spring 16 to clamp the seat ring 3 to be pressed into place, thereby achieving material gripping.

[0090] It should be noted that the principle of the present invention here is: using a seat ring limiting compression spring 16 and a seat ring limiting steel ball 12, through the reaction force generated by the compression of the seat ring limiting compression spring 16, limiting the position of the seat ring limiting steel ball 12 to complete the material engaging work of the seat ring 3 to be pressed, and the seat ring limiting steel ball 12 is popped out at the R angle through the spring force, forming 4 material engaging force supply points, generating a seat ring pre-tightening force for engaging the material.

[0091] It should be further explained that four material engaging force supply points are used in this specific embodiment. In actual application, the number of material engaging force supply points should be reasonably set according to the specific workpiece requirements and environmental requirements. The only thing that needs to be guaranteed is still the values of the axial offset 18 and the radial offset 19, which is emphasized again here.

[0092] S400. After the material engaging pressing head engages the material, it withdraws from the inner hole of the material channel of the seat ring 3 to be pressed and leaves the seat ring material channel area, and then moves to the pressing position coordinates through the servo with the seat ring 3 to be pressed.

[0093] S500. The material pressing head is pressed down to squeeze the seat ring 3 to be pressed into the seat ring hole of the part; the seat ring 3 to be pressed is separated from the material pressing head under the extrusion force of the tight fit with the seat ring hole, and the seat ring pressing work is completed.

[0094] Repeat S100 - S500 until all seat ring press - fitting work is completed.

[0095] In order to further verify the better technical effects achieved by the present invention compared with the prior art, based on a large number of experiments, tests, data collection and statistics, the applicant has obtained the following verification results:

[0096] It should be noted in advance that the data of this experiment is based on one production line; if an enterprise has multiple identical production lines, the data can be superimposed accordingly:

[0097] 1. In terms of efficiency improvement, after adopting the present invention, the repair time for abnormal fixture alarms and shutdowns is eliminated by 100 hours. According to the time required to repair and disassemble the problem of the pressure head seat ring after improvement, it takes about 80 minutes each time to replace or adjust the machine tool pressure head. Calculated at 27 yuan per hour for machining and 2 production line inlet and exhaust devices, the benefits brought by efficiency improvement are:

[0098] 100 hours * 27 yuan * 22 people = 60,000 yuan

[0099] 60,000 yuan × 2 inlet and exhaust devices = 120,000 yuan

[0100] That is, the present invention brings a benefit of 120,000 yuan to the production line in terms of efficiency.

[0101] 2. Each time a fault is repaired, the available production time is saved by more than 80 minutes. Calculated at 3 minutes for each processed part, and the number of fault alarms collected through maximo is about 50 times. Then, the number of cylinder heads that can be processed and saved in production during fault repair is:

[0102] 2 inlet and exhaust devices * 80 minutes of available production time saved during fault repair * 3 minutes to process one cylinder head = 2,500 cylinder heads can be saved in annual production

[0103] Currently, the profit per single - cylinder head is estimated at 100 yuan. Then, the profit created in terms of fault repair is:

[0104] Estimated profit per single - cylinder head of 100 yuan * 2,500 units = 250,000 yuan.

[0105] 3. The cost saved for maintenance personnel each time during maintenance is:

[0106] 80 minutes * 100 times * 2 devices * about 160 hours for 80 minutes * 27 yuan = 40,000 yuan

[0107] 4. The cost savings are:

[0108] Cost savings on the improved indenter spare parts: According to the statistics of the materials warehouse, the cost of each indenter spare part is about 2,000 yuan. Each device uses 3 pieces, and a total of 6 indenter pieces are used at two workstations, with an annual consumption of about 18 pieces. After the improvement, the damage cost of the indenter has decreased by 95%. The annual savings are about 30,000 yuan.

[0109] 5. The benefits brought by quality improvement are as follows: Since the indenter design does not meet the requirements for seat ring press-fitting fault alarm, the number of defective products in processing has decreased from 10 per month to 0, reducing by 100%, eliminating potential quality hazards in processing, and achieving zero-defect products. The cost of one cylinder head is 1,500 yuan * 30 units per year. The costs of repair, reuse, and scrapping are converted and estimated to save about 50,000 yuan annually.

[0110] 6. Other incidental benefits are as follows: Good safety and ergonomics; Eliminating the risk of hand injuries caused by the narrow space of the mechanical structure when disassembling and replacing indenter spare parts, and the risk of hand injuries caused by entering the narrow space to handle potential faults; After the improvement, the frequency of indenter replacement is eliminated, and the risks of slipping and falling caused by maintenance personnel entering the equipment multiple times are eliminated; Effectively avoiding the large bending movements (not in line with ergonomics) caused by maintenance workers replacing and adjusting indenter spare parts frequently for a long time.

[0111] In summary, after adopting the present invention, a production line accumulatively saves about 400,000 yuan annually.

[0112] In the above detailed description, various features are combined in a single embodiment to simplify the present disclosure. This method of disclosure should not be construed as reflecting an intention that the embodiments of the claimed subject matter require more features than those clearly stated in each claim. On the contrary, as reflected in the appended claims, the present invention lies in a state with fewer features than all the features of the disclosed single embodiment. Therefore, the appended claims are hereby clearly incorporated into the detailed description, where each claim stands alone as a separate preferred embodiment of the present invention.

[0113] To enable any person skilled in the art to implement or use the present invention, the above-described disclosed embodiments have been described. For those skilled in the art, various modification methods of these embodiments are obvious, and the general principles defined herein can also be applied to other embodiments without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0114] The foregoing description includes examples of one or more embodiments. Of course, it is not possible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but those of ordinary skill in the art should recognize that the various embodiments can be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. In addition, with respect to the term "comprising" as used in the specification or claims, this term is covered in a manner similar to the term "including", as interpreted when "including" is used as a transitional word in a claim. In addition, any use of the term "or" in the specification or claims of a patent is intended to mean "non-exclusive or".

[0115] The specific embodiments described above further elaborate on the object, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A feeding pressure head based on a steel ball spring, characterized in that: It includes a blank holding fixture (1) for connecting to a press-fitting machine and a guiding and material-taking device (2) for press-fitting a seat ring (3) to be press-fitted; wherein: The blank holding fixture (1) includes an equipment connection module (4) and a guiding and material-taking device connection module (5); wherein: The equipment connection module (4) is a cylinder, and its outer shape matches the inner shape of the equipment installation hole of the press-fitting machine. It includes a guiding connection shaft (6), a press head floating limit slot (7), and an upper shaft diameter of the press head (8); wherein: The guiding connection shaft (6) is a cylinder, and its upper end is fixedly connected to the lower end of the press head floating limit slot (7); the press head floating limit slot (7) is a cylinder, and its upper end is fixedly connected to the lower end of the upper shaft diameter of the press head (8); the outer shape of the press head floating limit slot (7) matches the inner shape of the tenon in the equipment installation hole of the press-fitting machine; the upper shaft diameter of the press head (8) is a cylinder; The guiding and material-taking device connection module (5) is a hollow cylindrical structure with a closed upper end and an open lower end; the upper outer end of the guiding and material-taking device connection module (5) is a machine tool press-fitting joint surface (9); the machine tool press-fitting joint surface (9) is fixedly connected to the lower end of the guiding connection shaft (6); The inner cavity of the guiding and material-taking device connection module (5) forms a guiding and material-taking device connection hole (10); the outer wall at the lower end of the guiding and material-taking device connection module (5) is provided with a seat ring press-fitting reference surface (11); the shape of the seat ring press-fitting reference surface (11) matches the inner shape of the seat ring (3) to be press-fitted; the inner wall at the lower end of the guiding and material-taking device connection module (5) is provided with a steel ball limit R angle (13) for restricting the displacement of the seat ring limit steel ball (12); the steel ball limit R angle (13) is an inward concave circular arc structure along the inner wall opening of the lower end of the guiding and material-taking device connection module (5); The symmetry axes of the guiding connection shaft (6), the press head floating limit slot (7), the upper shaft diameter of the press head (8), and the guiding and material-taking device connection module (5) are collinear; The guiding and material-taking device (2) includes a guiding and material-taking shaft body (14), a press-fitting guiding reference shaft (15), the seat ring limit steel ball (12), and a seat ring limit compression spring (16); wherein: The guiding and material-taking shaft body (14) is a cylinder, and its outer shape matches the inner shape of the guiding and material-taking device connection hole (10); The guiding and material-taking shaft body (14) is provided with a plurality of steel ball limit holes (17) near the lower end; the steel ball limit holes (17) are non-penetrating blind tubes and pass through the radius of the guiding and material-taking shaft body (14); the diameter of the steel ball limit holes (17) is matched with the diameter of the seat ring limit steel ball (12); the diameter of the seat ring limit compression spring (16) is matched with the diameter of the steel ball limit holes (17) and is inserted into the bottom of the steel ball limit holes (17); The seat ring limit steel ball (12) is movably placed at the mouth of the steel ball limit hole (17) and is movably connected to the seat ring limit compression spring (16); The press-fitting guiding reference shaft (15) is a cylinder, and its upper end is fixedly connected to the lower end of the guiding and material-taking shaft body (14); the symmetry axes of the press-fitting guiding reference shaft (15) and the guiding and material-taking shaft body (14) are collinear; The guiding and material-taking shaft body (14) is inserted into the guiding and material-taking device connection hole (10) along the symmetry axis; the guiding and material-taking shaft body (14) is detachably connected to the guiding and material-taking device connection hole (10); The radius of the seat ring limiting steel ball (12) matches the radian of the steel ball limiting R angle (13), and after the guiding and material-taking shaft body (14) is detachably connected to the guiding and material-taking device connection hole (10), it axially deviates outward by an axial deviation amount (18) and radially deviates inward by a radial deviation amount (19) along the axial center; The guiding and material-taking shaft body (14) and the guiding and material-taking device connection hole (10) are detachably connected through the press head assembly connecting limit spring pin (20); The guiding and material-taking device connection module (5) is provided with two spring pin limiting holes (21) between the upper end and the seat ring press-fitting reference surface (11); the two spring pin limiting holes (21) penetrate through the side wall of the guiding and material-taking device connection module (5) and pass through the diameter of the guiding and material-taking device connection module (5); The guiding and material-taking shaft body (14) is provided with a spring pin connection hole (22) near the upper end; the spring pin connection hole (22) penetrates through the guiding and material-taking shaft body (14) and passes through the diameter of the guiding and material-taking shaft body (14); the diameter of the spring pin connection hole (22) matches the outer diameter of the press head assembly connecting limit spring pin (20); After the guiding and material-taking shaft body (14) is inserted into the guiding and material-taking device connection hole (10) along the symmetry axis, the press head assembly connecting limit spring pin (20) sequentially passes through the spring pin limiting hole (21) on one side, the spring pin connection hole (22), and the spring pin limiting hole (21) on the other side to achieve detachable connection; The press head assembly connecting limit spring pin (20) has an interference fit with the spring pin limiting hole (21) and the spring pin connection hole (22); The axial deviation amount (18) is 0.15 mm; the radial deviation amount (19) is 0.25 mm.

2. The material feeding pressure head based on a steel ball spring according to claim 1, wherein: There are 4 steel ball limiting holes (17) on the guiding and material-taking shaft body (14); the 4 steel ball limiting holes (17) are symmetrically distributed with the symmetry axis of the guiding and material-taking shaft body (14) as the center; one seat ring limiting steel ball (12) and one seat ring limiting compression spring (16) are installed in each steel ball limiting hole (17).

3. The feed pressing head based on a steel ball spring according to claim 2, characterized in that: The lower end of the press-fitting guiding reference shaft (15) is provided with a guiding connection shaft surface (23); the guiding connection shaft surface (23) is conical and the top is flat.

4. The feed pressing head based on a steel ball spring according to claim 3, characterized in that: The guiding and material-taking shaft body (14) is provided with a seat ring guiding surface (24) at the fixed connection with the press-fitting guiding reference shaft (15); the seat ring guiding surface (24) is a circle of inclined surfaces evenly distributed along the lower edge of the guiding and material-taking shaft body (14).

5. A material feeding method using the material feeding press head based on a steel ball spring according to claim 4, characterized in that: Comprising the following steps: S100. The press-fitting guide reference shaft (15) is vertically inserted into the inner hole of the material channel of the seat ring (3) to be press-fitted through the guide connecting shaft surface (23) for positioning; S200. The material pressing head continues to move downward until the chamfer of the seat ring (3) to be pressed contacts the seat ring guide surface (24); S300. The inner ring of the seat ring (3) to be pressed squeezes the seat ring limiting steel ball (12), and the seat ring limiting steel ball (12) further squeezes the seat ring limiting compression spring (16) and retracts into the steel ball limiting hole (17), and relies on the reaction force provided by the seat ring limiting compression spring (16) to clamp the seat ring (3) to be pressed, so as to achieve material grip; S400. After the material engaging press head has engaged the material, the inner hole of the material channel of the seat ring (3) to be pressed is withdrawn from the seat ring material channel area, and then the seat ring (3) to be pressed is moved to the press position coordinates through the servo; S500. The material pressing head is pressed down to squeeze the seat ring (3) to be pressed into the seat ring hole of the part; the seat ring (3) to be pressed is separated from the material pressing head under the extrusion force of the tight fit with the seat ring hole, and the seat ring pressing work is completed; S600. Repeat S100 to S500 until all seat ring press-fitting work is completed.

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