Composite sharp-edged die cutting device for fluoroplastic sealing retaining ring and its use method

Abstract

The invention relates to a composite sharp-edged die cutting device for a fluoroplastic sealing retaining ring and a method for using the device. The device comprises a steel die frame, a cushion arranged at the lower end of the steel die frame, a cushion pre-tightening sleeve arranged around the cushion, and a die device, a positioning device, and a die pressing device. The specific steps of using the device are as follows: S1: die matching; S2: assembly; S3: assembly; S4: installation. The invention adopts a ball guide column type steel die frame, and both the concave die and the convex die adopt composite sharp cutting edges, and both adopt pre-pressed cushions to achieve gapless cutting. At the same time, a floating die pressing device is adopted to avoid gravity pressing into the fluoroplastic sheet to cause deformation and affect the punching accuracy. The invention solves the disadvantageous problems of turning manufacturing of the fluoroplastic sealing retaining ring, realizes the machining accuracy requirements of the fluoroplastic sealing retaining ring, greatly improves the manufacturing efficiency and dimensional accuracy control, and realizes the assembly loading taper to meet the assembly requirements.

Description

Technical Field

[0001] The invention relates to the technical field of fluoroplastic production and processing, in particular to a composite sharp-edged die cutting device for a fluoroplastic sealing retaining ring and a use method thereof. Background Art

[0002] Fluoroplastics are widely used in sealing rings in hydraulic fluid structures due to their good high and low temperature resistance and self-lubricating properties. In industrial manufacturing, hydraulic fluid technology is an important execution and feedback component in mechanical structures, and hydraulic seals are an important link in ensuring that hydraulic execution and feedback meet design requirements. In order to achieve high pressure and rapid movement of hydraulic fluids, the rubber sealing rings involved in the sealing must be protected in the hydraulic system to prevent the rubber sealing rings from being squeezed into the gap between the piston and the piston cylinder by the fluid pressure and damaged and failed. Fluoroplastic sealing rings play this special protective role.

[0003] Fluoroplastic molding can only be prepared by a processing method similar to "powder metallurgy" that combines cold pressing and sintering to prepare simple-shaped products such as plates, rods, sleeves, film blanks, and pads, which are then turned into fluoroplastic sealing rings by shearing and cutting. Fluoroplastic sealing rings were originally made by turning, which led to the following defects: first, the raw material utilization rate was only about 20%, and 80% of the material was turned into waste chips; second, the turning efficiency was low; third, the turning size control was difficult, the size was difficult to measure, and the scrap rate was high; fourth, the outer circle of the turn was difficult to form an assembly taper and difficult to assemble. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a composite sharp-edged die cutting device for a fluoroplastic sealing retaining ring and a method for using the same.

[0005] A composite sharp-edged die cutting device for a fluoroplastic sealing retaining ring comprises a steel die frame, a soft cushion arranged at the lower end of the steel die frame, a soft cushion pre-tightening sleeve arranged around the soft cushion, and also comprises:

[0006] A mold device, arranged on the soft cushion, is used for clamping the fluoroplastic;

[0007] A positioning device, arranged on the mold device, for positioning the fluoroplastic;

[0008] The die pressing device is arranged on a steel die frame and cooperates with the die device to realize die cutting of the die device.

[0009] The mold device comprises a cutting edge protection tray placed on a soft cushion, a concave mold device arranged on the cutting edge protection tray, and a convex mold device matched with the concave mold device.

[0010] The concave die device comprises a concave die arranged on a cutting edge tray and a concave die pad arranged on the concave die.

[0011] The punch device comprises a punch fixing plate arranged on a die pad, and a punch arranged on a cutting edge tray and matched with the punch fixing plate.

[0012] The positioning device includes a unloading sleeve arranged between the die and the punch, a punching pin arranged on the unloading sleeve, a hexagon socket head screw 1 arranged between the cushion and the cushion pre-tightening sleeve, a hexagon socket head screw 2 arranged on the steel mold frame and passing through the punch fixing plate and the die pad, and a hexagon socket head screw 3 arranged between the punch fixing plate and the punch.

[0013] The die pressing device includes a die handle arranged on the upper surface of the upper end of the steel die frame, a punching plate arranged on the lower surface of the upper end of the steel die frame, a pull rod screw passing through the die handle, the punching plate, and the upper end of the steel die frame, and a compression spring block arranged on the upper end of the pull rod screw.

[0014] The pull rod screw has a cylindrical helical compression spring built in it, and the mold handle is provided with a hexagon socket head screw four for fixing and cooperating with the upper end of the steel mold frame.

[0015] The method for using the composite sharp-edged die cutting device for fluoroplastic sealing retaining rings has the following specific steps:

[0016] S1: Mold matching: fasten the punch and the punch fixing plate, and then use standard positioning pins to position the punch and the punch fixing plate;

[0017] S2: Assembly: a: Fit the discharge sleeve with the punch and keep the fitting clearance of 0.03mm;

[0018] b: Assemble the die pad and die on the discharge sleeve and keep the matching clearance of 0.03mm;

[0019] c: Match the punch pin with the punch fixing plate and keep a movable gap of 0.1mm;

[0020] d: Tighten the pull rod screw and the punching plate;

[0021] S3: Assembly: Fit the die handle with the steel die frame, and the tie rod screw fits through the die handle and maintains a movable clearance of 0.2mm;

[0022] S4: Installation: Install the above parts on the punch press and adjust them to match the soft pad. Control the cutting depth to about 0.1mm. Put the fluoroplastic for punching. Check that the surface of the punched fluoroplastic sealing ring and the punching burr are no more than 0.05mm.

[0023] The beneficial effects of the present invention are as follows: the present invention adopts a ball guide column type steel mold frame, both the concave mold and the convex mold adopt composite sharp cutting edges, both adopt pre-pressed soft pads to achieve gapless incisions, and adopt a floating die pressing device to avoid gravity pressing into the fluoroplastic sheet to cause deformation and affect the punching accuracy; by using the present invention, the unfavorable problems of turning and manufacturing of fluoroplastic sealing retaining rings are solved, and the processing accuracy requirements of fluoroplastic sealing retaining rings are achieved, and the convenience of operation, raw material utilization rate, manufacturing efficiency, and dimensional accuracy control are greatly improved, and at the same time, the assembly taper is achieved to meet the assembly requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the structure of the compression spring block of the present invention;

[0027] Figure 3 It is a schematic diagram of the pull rod screw structure of the present invention;

[0028] Figure 4 It is a schematic diagram of the mold handle structure of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the material-beating tray of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the material-beating pin of the present invention;

[0031] Figure 7 It is a schematic diagram of the male mold structure of the present invention;

[0032] Figure 8 It is a schematic diagram of the structure of the unloading sleeve of the present invention;

[0033] Fig. 9 It is a schematic diagram of the structure of the concave mold of the present invention;

[0034] Fig.10 It is a schematic diagram of the structure of the punch fixing plate of the present invention;

[0035] Fig.11 It is a schematic diagram of the structure of the die pad of the present invention;

[0036] Fig.12 It is a schematic diagram of the structure of the blade protection tray of the present invention;

[0037] Fig.13 It is a schematic diagram of the structure of the cushion pre-tightening sleeve of the present invention;

[0038] Fig.14 It is a schematic diagram of the cushion structure of the present invention. DETAILED DESCRIPTION

[0039] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below.

[0040] like Figures 1 to 14 As shown, a composite sharp-edged cutting die device for a fluoroplastic sealing retaining ring comprises a steel mold frame 14, a soft cushion 13 arranged at the lower end of the steel mold frame 14, a soft cushion pre-tightening sleeve 12 arranged around the soft cushion 13, and further comprises:

[0041] A mold device, arranged on the soft cushion 13, is used to clamp the fluoroplastic;

[0042] A positioning device, arranged on the mold device, for positioning the fluoroplastic;

[0043] The die pressing device is arranged on the steel die frame 14 and cooperates with the mold device to realize the die cutting of the mold device.

[0044] The present invention adopts a ball guide column type steel mold frame 14, the concave mold 8 and the punch 6 both adopt composite sharp cutting edges, both adopt pre-pressed soft pads 13 to achieve gapless incisions, and at the same time adopt a floating die pressing device to avoid gravity pressing into the fluoroplastic sheet to cause deformation and affect the punching accuracy; by using the present invention, the disadvantages of turning and manufacturing of fluoroplastic sealing retaining rings are solved, and the processing accuracy requirements of fluoroplastic sealing retaining rings are achieved, and the convenience of operation, raw material utilization rate, manufacturing efficiency, and dimensional accuracy control are greatly improved. At the same time, the assembly taper is achieved to meet the assembly requirements.

[0045] The mold device comprises a cutting edge tray 11 placed on a soft cushion 13, a die device arranged on the cutting edge tray 11, and a convex mold device matched with the die device.

[0046] The die device comprises a die 8 arranged on a cutting edge tray 11 and a die pad 10 arranged on the die 8 .

[0047] The punch 6 is evenly distributed with four threaded holes 602, and the punch fixing plate 9 is evenly distributed with four step holes 903.

[0048] The punch 6 is provided with a punch hole 601 , and the punch fixing plate 9 is provided with a second step hole 904 .

[0049] The discharge sleeve 7 is provided with a discharge hole 701 , and the punch 6 is provided with a punch outer circle 603 matching with the discharge hole 701 .

[0050] The discharge sleeve 7 is also provided with a discharge outer circle 702 .

[0051] The pull rod screw 2 is provided with a pull rod thread 202, and the punching plate 4 is provided with a punching internal thread 401.

[0052] The mold handle 3 is provided with a pull rod inner hole 302 .

[0053] The punch device comprises a punch fixing plate 9 arranged on a die backing plate 10 , and a punch 6 arranged on a cutting edge tray 11 and matched with the punch fixing plate 9 .

[0054] The positioning device includes a unloading sleeve 7 arranged between the die 8 and the punch 6, a punching pin 5 arranged on the unloading sleeve 7, a hexagon socket head screw 15 arranged between the cushion 13 and the cushion pre-tightening sleeve 12, a hexagon socket head screw 16 arranged on the steel mold frame 14 and passing through the punch fixing plate 9 and the die pad 10, and a hexagon socket head screw 3 17 arranged between the punch fixing plate 9 and the punch 6.

[0055] The die pressing device includes a die handle 3 arranged on the upper surface of the upper end of a steel die frame 14, a punching plate 4 arranged on the lower surface of the upper end of the steel die frame 14, a pull rod screw 2 passing through the die handle 3, the punching plate 4, and the upper end of the steel die frame 14, and a compression spring block 1 arranged on the upper end of the pull rod screw 2.

[0056] The pull rod screw 2 has a cylindrical helical compression spring 19 built in it, and the mold handle 3 is provided with a hexagon socket head screw 18 for fixing and cooperating with the upper end of the steel mold frame 14.

[0057] The method for using the composite sharp-edged die cutting device for fluoroplastic sealing retaining rings has the following specific steps:

[0058] S1: Mold matching: The punch 6 and the punch fixing plate 9 are fastened by standard fastening hexagon socket screws through four threaded holes 602 evenly distributed on the punch 6 and four step holes 1 903 evenly distributed on the punch fixing plate 9, and are positioned and determined by standard positioning pins through the punch hole 601 of the punch 6 and the step hole 2 904 of the punch fixing plate 9;

[0059] S2: Assembly: a: Fit the discharge hole 701 of the discharge sleeve 7 to the outer circle 603 of the punch 6 to maintain a fitting clearance of 0.03 mm;

[0060] b: Assemble the die pad 10 and the die 8 on the discharge outer circle 702 of the discharge sleeve 7 to maintain a matching clearance of 0.03mm;

[0061] c: Match the punch pin 5 with the punch fixing plate 9 and keep a movable gap of 0.1mm;

[0062] d: Fit and tighten the rod thread 202 of the rod screw 2 with the internal thread 401 of the punching plate 4;

[0063] S3: Assembling: the mold handle 3 is matched with the steel mold frame 14, and the tie rod screw 2 is matched through the tie rod inner hole 302 of the mold handle 3 and maintains a movable clearance of 0.2 mm;

[0064] S4: Installation: Install the above components on the punch press and adjust them to match the soft pad 13, control the cutting depth to about 0.1mm, put the fluoroplastic for punching, and check that the surface of the punched fluoroplastic sealing ring and the punching burr are no more than 0.05mm.

[0065] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A composite sharp-edged die cutting device for a fluoroplastic sealing retaining ring, comprising a steel die frame (14), a soft cushion (13) arranged at the lower end of the steel die frame (14), and a soft cushion pre-tightening sleeve (12) arranged around the soft cushion (13), characterized in that: Also includes: A mold device is arranged on the soft cushion (13) and is used for clamping the fluoroplastic; A positioning device, arranged on the mold device, for positioning the fluoroplastic; A die pressing device, arranged on a steel die frame (14) and cooperating with the die device, is used to realize die cutting of the die device; The mold device comprises a cutting edge tray (11) placed on a soft pad (13), a die device arranged on the cutting edge tray (11), and a punch device cooperating with the die device; the die device comprises a die (8) arranged on the cutting edge tray (11), and a die pad (10) arranged on the die (8); the punch device comprises a punch fixing plate (9) arranged on the die pad (10), and a punch (6) arranged on the cutting edge tray (11) and cooperating with the punch fixing plate (9); the positioning device comprises a discharge sleeve (7) arranged between the die (8) and the punch (6), a punching pin (5) arranged on the discharge sleeve (7), a hexagon socket head screw (15) arranged between the soft pad (13) and the soft pad pre-tightening sleeve (12), and a Two hexagon socket head screws (16) are on the steel mold frame (14) and pass through the punch fixing plate (9) and the die pad (10), and three hexagon socket head screws (17) are arranged between the punch fixing plate (9) and the punch (6); the die pressing device includes a mold handle (3) arranged on the upper surface of the upper end of the steel mold frame (14), a punching plate (4) arranged on the lower surface of the upper end of the steel mold frame (14), a pull rod screw (2) passing through the mold handle (3), the punching plate (4), and the upper end of the steel mold frame (14), and a compression spring block (1) arranged at the upper end of the pull rod screw (2); the pull rod screw (2) has a built-in cylindrical helical compression spring (19), and the mold handle (3) is provided with four hexagon socket head screws (18) for fixing and cooperating with the upper end of the steel mold frame (14).

2. The method for using the composite sharp-edged die cutting device for fluoroplastic sealing retaining ring according to claim 1 is characterized in that: The specific steps are as follows: S1: Mold matching: The punch (6) and the punch fixing plate (9) are fastened by standard fastening hexagon socket screws through four threaded holes (602) evenly distributed on the punch (6) and four stepped holes 1 (903) evenly distributed on the punch fixing plate (9), and are positioned and fixed by standard positioning pins through the punch hole (601) of the punch (6) and the stepped hole 2 (904) of the punch fixing plate (9); S2: Assembly: a: Fit the discharge hole (701) of the discharge sleeve (7) onto the outer circle (603) of the punch (6) to maintain a fitting clearance of 0.03 mm; b: Assemble the die backing plate (10) and the die (8) on the discharge outer circle (702) of the discharge sleeve (7) to maintain a matching clearance of 0.03 mm; c: Match the punch pin (5) with the punch fixing plate (9) and keep a movable clearance of 0.1 mm; d: Fit and tighten the rod thread (202) of the rod screw (2) with the internal thread (401) of the punching plate (4); S3: Assembling: the mold handle (3) is matched with the steel mold frame (14), and the pull rod screw (2) is matched through the pull rod inner hole (302) of the mold handle (3) and maintains a movable clearance of 0.2 mm; S4: Installation: Install the above components on the punch press and adjust them to match the soft pad (13), control the cutting depth to 0.1mm, put the fluoroplastic for punching, and check that the surface of the punched fluoroplastic sealing ring and the punching burr are not more than 0.05mm.

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