An assembly process for an internally electroplated pin tumbler padlock

Abstract

This invention discloses an assembly process for an internally electroplated pin tumbler padlock, comprising the following steps: First, machining lock beam holes, pin tumbler holes, bolt grooves, lock cylinder holes, and process holes on the lock body; Second, installing the bolt and bolt spring, and using auxiliary component C to fix the positions of the bolt and bolt spring; Third, sealing the lock beam holes, pin tumbler holes, and lock cylinder holes, followed by surface polishing and electroplating; Fourth, using auxiliary component D1 to install the pin tumbler spring into the pin tumbler hole, and then removing auxiliary component D1; Fifth, using auxiliary components D2 and H to compress and block the compressed pin tumbler spring, and then removing auxiliary component D2; Sixth, using auxiliary component D1 to install the upper flat spring and the vertical milling spring into the pin tumbler hole, and then removing auxiliary component D1; Seventh, installing the lock cylinder containing the key into the lock body, removing auxiliary components H and C, and finally installing the lock beam to obtain the pin tumbler padlock. This invention not only improves the yield rate but also has the advantages of high work efficiency, convenient operation, and ease of use.

Description

Technical Field

[0001] This invention relates to a pin tumbler lock assembly process, and more particularly to an assembly process for an internally electroplated pin tumbler padlock. Background Technology

[0002] Pin tumbler padlocks are mainly assembled from a lock body, lock beam, lock cylinder, pins, and pin springs. In current electroplated pin tumbler padlock assembly processes, the lock beam holes, lock cylinder holes, and latch holes are typically machined first. Then, the lock body is surface-polished and sent to an electroplating plant for electroplating. After electroplating, specialized equipment is used to machine the pin holes, and finally, the pin springs and pins are assembled. However, this process damages the electroplating layer, severely affecting surface quality. Another assembly method involves pre-installing the pin springs before electroplating, using an auxiliary component to guide them into the pin holes. However, this requires inserting each pin individually into the holes using tweezers. This process not only limits the operator's field of vision but also complicates the steps, making assembly difficult and inefficient. Both methods result in a yield rate between 50% and 70%, and in severe cases, the entire lock may be scrapped, leading to a low overall yield. Therefore, existing electroplated pin tumbler padlock assembly methods suffer from low yield rates and low work efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide an assembly process for padlocks with internally plated pin tumblers. This invention not only improves the yield rate but also has the advantage of lower work efficiency.

[0004] The technical solution of the present invention: an assembly process for an internally electroplated pin tumbler padlock, comprising the following steps:

[0005] Step A: Use a punching machine to set lock beam holes, pin holes, lock tongue grooves and lock cylinder holes on the lock body, and set process holes between the lock beam holes and pin holes;

[0006] Step B: Install the tongue spring on the lock tongue to form component A; then install component A into the lock tongue groove through the lock cylinder hole; at the same time, insert auxiliary component C into the lock beam hole, and use auxiliary component C to control the position and direction of component A in the lock body to assemble component B.

[0007] Step C: Seal the lock beam hole, pin hole and lock cylinder hole with a sealing plate, then polish the surface, and then perform electroplating to obtain a lock body with electroplating completed.

[0008] Step D: Place the pin spring on the auxiliary part D1, then insert the auxiliary part D1 into the lock body through the lock cylinder hole so that the pin spring enters the corresponding pin hole, and then remove the auxiliary part D1 from the lock body to obtain part C;

[0009] Step E: Insert auxiliary component D2 into the lock body through the lock cylinder hole and into the tumbler hole to compress the internal tumbler spring. Then, insert auxiliary component H into the process hole through auxiliary component C. Finally, remove auxiliary component D2 to obtain component D.

[0010] Step F: Place the upper flat spring and the vertical milling spring on the auxiliary component D1, and then extend the auxiliary component D1 into the lock body through the lock cylinder hole so that the upper flat spring and the vertical milling spring also enter the corresponding pin holes. Then remove the auxiliary component D1 from the lock body to obtain component E.

[0011] Step G: Insert the key into the lock cylinder, then install the lock cylinder containing the key into the lock body through the lock cylinder hole; then remove auxiliary parts H and C from the lock beam hole, and finally install the lock beam into the lock beam hole to form a finished pin tumbler padlock;

[0012] The assembly process for pin tumbler padlocks has been modified from the original method of electroplating, punching, and finally installing pins and springs. Now, the process involves punching holes first, followed by electroplating and installation of the pins and springs. This avoids damage to the electroplating layer caused by subsequent punching, increasing the yield rate from 50%–70% to 90%–95%, thus improving the overall padlock yield and reducing production costs. Furthermore, by using auxiliary parts C, D1, D2, and H to assist in the placement of the latch, springs, and pins during assembly, the process allows for the simultaneous assembly of multiple pins and springs, improving efficiency and simplifying the operation compared to the previous method of assembling one by one with tweezers.

[0013] In the aforementioned assembly process of an internally plated pin tumbler padlock, the auxiliary component C is cylindrical, with an annular groove in the middle of its side surface; a through hole is provided in the middle of the auxiliary component C, with the axis of the through hole coinciding with the axis of the auxiliary component C; the annular groove can cooperate with the lock tongue to fix the position of the lock tongue, and the setting of the annular groove can remove restrictions on the angle and position of the auxiliary component C, making it convenient to use; the through hole in the middle of the auxiliary component C allows the subsequent auxiliary component H to enter the process hole, making it convenient to use.

[0014] In the aforementioned assembly process of an internally plated pin tumbler padlock, the auxiliary component D1 includes a main body, on the side of which are provided multiple vertically and evenly distributed material feeding grooves; and a handle is provided at the bottom end of the main body.

[0015] In the aforementioned assembly process of an internally plated pin tumbler padlock, the auxiliary component D2 includes a handle bar, and the end side of the handle bar is provided with multiple vertically and evenly distributed horizontal bars, and the end of each horizontal bar is provided with an arc-shaped auxiliary through groove.

[0016] In the aforementioned assembly process of an internally plated pin tumbler padlock, the auxiliary component H includes a circular head and a vertical rod. The outer diameter of the circular head is larger than the diameter of the lock beam hole; the diameter of the vertical rod is smaller than the diameter of the process hole. By setting up the handle, the handle rod, and the circular head, a certain amount of operating space can be provided for the use and disassembly of the auxiliary components D1, D2, and H, which facilitates use.

[0017] In the aforementioned assembly process of an internally plated pin tumbler padlock, the diameter of the process hole is smaller than the diameter of the lock beam hole.

[0018] Compared with existing technologies, this invention improves the existing pin tumbler padlock assembly process. It modifies the original process of electroplating, punching, and finally installing pins and springs to a method where holes are punched first, followed by electroplating and installation of pins and springs. This avoids damage to the electroplating layer caused by subsequent punching, thereby increasing the yield rate from 50%–70% to 90%–95%, improving the overall padlock yield and reducing production costs. Furthermore, by using auxiliary components C, D1, D2, and H to assist in the placement of the latch, pin springs, and pins during assembly, this invention allows for the simultaneous assembly of multiple pins and springs, improving work efficiency and making the process much more convenient, compared to the previous method of assembling one by one with tweezers. Furthermore, this invention also features an annular groove in auxiliary component C, which engages with the locking tongue to fix its position. The groove also removes restrictions on the angle and position of auxiliary component C, facilitating its use. The through hole in the center of auxiliary component C allows subsequent auxiliary component H to easily enter the process hole, further simplifying its use. The inclusion of a handle, a handle bar, and a circular head provides sufficient operating space for the use and disassembly of auxiliary components D1, D2, and H, enhancing their ease of use. Therefore, this invention not only improves the yield rate but also offers advantages such as high work efficiency, convenient operation, and ease of use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the assembled lock body structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the lock body;

[0021] Figure 3 This is a schematic diagram of the lock body assembly with the bolt and tongue spring;

[0022] Figure 4 This is a schematic diagram of the structure with the ball spring assembled.

[0023] Figure 5 This is a schematic diagram of the auxiliary component H entering the lock body;

[0024] Figure 6 This is a structural diagram showing the assembled upper flat spring and vertical milling spring;

[0025] Figure 7 This is a structural schematic diagram of auxiliary component H;

[0026] Figure 8 This is a structural schematic diagram of auxiliary component D1;

[0027] Figure 9 This is a structural schematic diagram of auxiliary component D2;

[0028] Figure 10 This is a structural schematic diagram of auxiliary component C.

[0029] The markings in the attached diagram are as follows: 1-lock body, 2-lock beam hole, 3-tumbler hole, 4-lock tongue groove, 5-lock cylinder hole, 6-process hole, 7-lock tongue, 8-tongue spring, 9-tumbler spring, 10-upper flat spring, 11-vertical milling spring, 12-lock cylinder, 13-lock beam, 14-ring groove, 15-main body, 16-feeding groove, 17-handle, 18-crossbar, 19-circular head, 20-vertical bar. Detailed Implementation

[0030] The present invention will be further described below with reference to embodiments, but these embodiments are not intended to limit the scope of the invention.

[0031] Example. An assembly process for an internally plated pin tumbler padlock, comprising the following: Figures 1 to 10 As shown, it includes the following steps:

[0032] Step A: Using a punching machine, lock beam hole 2, pin hole 3, lock tongue groove 4 and lock cylinder hole 5 are set on lock body 1, and process hole 6 is set between lock beam hole 2 and pin hole 3;

[0033] Step B: Install tongue spring 8 on the lock tongue 7 to form component A; then install component A into the lock tongue groove 4 through the lock cylinder hole 5; at the same time, put auxiliary component C into the lock beam hole 2, and use auxiliary component C to control the position and direction of component A in the lock body 1 to assemble component B.

[0034] Step C: Use a sealing plate to seal the lock beam hole 2, pin hole 3 and lock cylinder hole 5, then perform surface polishing, and after polishing, perform electroplating to obtain a lock body with electroplating completed.

[0035] Step D: Place the pin spring 9 on the auxiliary part D1, then extend the auxiliary part D1 into the lock body 1 through the lock cylinder hole 5 so that the pin spring 9 enters the corresponding pin hole 3, and then remove the auxiliary part D1 from the lock body 1 to obtain part C;

[0036] Step E: Insert auxiliary component D2 into the lock body 1 through the lock cylinder hole 2 and into the tumbler hole 3 to compress the internal tumbler spring 9. Then, insert auxiliary component H into the process hole 6 through auxiliary component C. Finally, remove auxiliary component D2 to obtain component D.

[0037] Step F: Place the upper flat spring 10 and the vertical milling spring 11 on the auxiliary part D1, and then extend the auxiliary part D1 into the lock body 1 through the lock core hole 5 so that the upper flat spring 10 and the vertical milling spring 11 also enter the corresponding ball hole 3. Then remove the auxiliary part D1 from the lock body 1 to obtain part E.

[0038] Step G: Insert the key into the lock cylinder 12, and then install the lock cylinder 12 containing the key into the lock body 1 through the lock cylinder hole 5; then remove the auxiliary parts H and C from the lock beam hole 2, and finally install the lock beam 13 into the lock beam hole 2 to form a finished pin tumbler padlock.

[0039] The auxiliary component C is cylindrical, with an annular groove 14 in the middle of its side surface; a through hole is provided in the middle of the auxiliary component C, the axis of which coincides with the axis of the auxiliary component C; the auxiliary component D1 includes a main body 15, with multiple vertically evenly distributed feeding grooves 16 on its side surface; a grip 17 is provided at the bottom end of the main body 15; the auxiliary component D2 includes a grip bar, with multiple vertically evenly distributed crossbars 18 on the side surface of the end of the grip bar, each crossbar 18 having an arc-shaped auxiliary through groove at its end; the auxiliary component H includes a circular ring head 19 and a vertical rod 20, the outer diameter of the circular ring head 19 being larger than the diameter of the locking beam hole 2; the diameter of the vertical rod 20 being smaller than the diameter of the process hole 6; the diameter of the process hole 6 being smaller than the diameter of the locking beam hole 2.

Claims

1. A process for assembling an internally electroplated pin tumbler padlock, characterized in that, Includes the following steps: Step A: Using a punching machine, lock beam holes (2), pin holes (3), lock tongue grooves (4) and lock cylinder holes (5) are set on the lock body (1), and process holes (6) are set between the lock beam holes (2) and the pin holes (3); Step B: Install the tongue spring (8) on the lock tongue (7) to form component A; then install component A into the lock tongue groove (4) through the lock cylinder hole (5); at the same time, put the auxiliary component C into the lock beam hole (2) and use the auxiliary component C to control the position and direction of component A in the lock body (1) to assemble component B. Step C: Use a sealing plate to seal the lock beam hole (2), pin hole (3) and lock cylinder hole (5), then perform surface polishing, and after polishing, perform electroplating to obtain a lock body that has completed electroplating. Step D: Place the ball spring (9) on the auxiliary part D1, and then insert the auxiliary part D1 into the lock body (1) through the lock cylinder hole (5) so that the ball spring (9) enters the corresponding ball hole (3). Then remove the auxiliary part D1 from the lock body (1) to obtain part C. Step E: Insert the auxiliary part D2 into the lock body (1) through the lock cylinder hole (5) and into the tumbler hole (3) to compress the tumbler spring (9) inside. Then, insert the auxiliary part H into the process hole (6) through the auxiliary part C. Finally, remove the auxiliary part D2 to obtain part D. Step F: Place the upper flat spring (10) and the vertical milling spring (11) on the auxiliary part D1, and then extend the auxiliary part D1 into the lock body (1) through the lock core hole (5) so that the upper flat spring (10) and the vertical milling spring (11) also enter the corresponding pin holes (3). Then remove the auxiliary part D1 from the lock body (1) to obtain part E. Step G: Insert the key into the lock cylinder (12), and then install the lock cylinder (12) with the key into the lock body (1) through the lock cylinder hole (5); then take out the auxiliary parts H and C from the lock beam hole (2), and finally install the lock beam (13) into the lock beam hole (2) to form a finished pin tumbler padlock.

2. The assembly process for an internally electroplated pin tumbler padlock according to claim 1, characterized in that: The auxiliary component C is cylindrical, and an annular groove (14) is provided in the middle of the side of the auxiliary component C; a through hole is provided in the middle of the auxiliary component C, and the axis of the through hole coincides with the axis of the auxiliary component C.

3. The assembly process for an internally electroplated pin tumbler padlock according to claim 1, characterized in that: The auxiliary component D1 includes a main body (15), and a plurality of vertically evenly distributed feeding grooves (16) are provided on the side of the main body (15); a hand grip (17) is provided at the bottom end of the main body (15).

4. The assembly process for an internally electroplated pin tumbler padlock according to claim 1, characterized in that: The auxiliary component D2 includes a hand grip, and the end side of the hand grip is provided with a plurality of vertically evenly distributed crossbars (18), and the end of each crossbar (18) is provided with an arc-shaped auxiliary through groove.

5. The assembly process for an internally electroplated pin tumbler padlock according to claim 1, characterized in that: The auxiliary component H includes a ring head (19) and a vertical rod (20). The outer diameter of the ring head (19) is larger than the diameter of the locking beam hole (2); the diameter of the vertical rod (20) is smaller than the diameter of the process hole (6).

6. The assembly process for an internally electroplated pin tumbler padlock according to any one of claims 1 to 5, characterized in that: The diameter of the process hole (6) is smaller than the diameter of the lock beam hole (2).

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