Steel belt expanding device for key production

Abstract

The utility model discloses a steel belt expansion device for key production, which comprises a fixed sliding rod installed on a punch press and a sliding block connected on the fixed sliding rod in a sliding mode, a supporting rod and a connecting bolt are fixed on the sliding block, a limiting rod is fixed on the end portion of the right side of the fixed sliding rod, a tension spring is further arranged between the sliding block and the limiting rod, and the tension spring is connected with the sliding block. One end of the tension spring is sleeved on the connecting bolt, the other end of the tension spring is sleeved on the connecting bolt after bypassing the limiting rod, and a locking block is relatively fixed on the supporting rod; the steel belt feeding device has the advantages of being simple in structure and capable of effectively keeping the stability of a steel belt fed into a stamping die.

Description

Technical Field

[0001] The utility model relates to the technical field of key production equipment, in particular to a steel belt expansion device for key production. Background Art

[0002] Ordinary padlocks need to be configured with corresponding keys to open them. During the production process of the key, the initial steel strip is punched by a stamping machine to form a key blank, and then the key blank is processed to make the key. The existing key blank has been produced using a continuous stamping machine, that is, it can be continuously punched and made without human operation on the side. The raw material of the die is a roll of steel strip. Generally, a progressive device is installed at one end of the steel strip so that the steel strip can be fed step by step according to the specified distance. When the steel strip is fed into the stamping die, there will be an arc. If the arc is not well controlled, the steel strip will be deformed at the least, and the stamped key blank will directly become a defective product. At worst, the steel strip will curl due to excessive stress during transportation, resulting in cracks or breaks. Therefore, an expansion device is required so that the steel strip can always maintain an arc when entering the mold. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a steel strip expansion device for key production, which has a simple structure and can effectively maintain the stability of the steel strip when it is fed into a stamping die.

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] A steel strip expansion device for key production comprises a fixed slide rod installed on a punch press and a slider slidably connected to the fixed slide rod, a support rod and a connecting bolt are fixed to the slider, a limit rod is fixed to the right end of the fixed slide rod, a tension spring is also provided between the slider and the limit rod, one end of the tension spring is sleeved on the connecting bolt, and the other end is sleeved on the connecting bolt after bypassing the limit rod, and a locking block is relatively fixed on the support rod.

[0006] A further technical solution is that the support rod is vertically fixed on the slider. The support rod is vertically fixed on the slider so that the side of the steel belt can be more closely fitted to the outer circumferential surface of the sleeve on the support rod, and the transmission is more stable.

[0007] A further technical solution is that a sleeve is fixed on the outer circumferential side of the support rod, the locking block is sleeved on the sleeve, and the locking block is also threadedly connected with a locking bolt. After the locking bolt and the locking block are threadedly locked, the end of the locking bolt passes through the locking block and is set in contact with the sleeve. The support rod is an iron part and can be directly welded and fixed on the slider, and then the sleeve is sleeved on the outside of the support rod. The sleeve is a hollow tube made of stainless steel, and its surface will not damage the surface of the steel belt after contacting with the steel belt. If the support rod directly contacts the steel belt, the support rod will directly scratch the surface of the steel belt after rusting. Therefore, the sleeve can prevent scratches on the surface of the steel belt.

[0008] A further technical solution is that the locking block is a butterfly-shaped structure, and the diameter of its outer end is larger than the diameter of its inner end. This locking block structure can have a larger contact surface with the side of the steel belt when the distance is adjusted left and right on the support rod.

[0009] The beneficial effects of the utility model are as follows: the utility model provides a steel belt expansion device for key production, which contacts the surface of the steel belt through the sleeve on the outside of the support rod. When the steel belt generates tension during the transportation process, it will drive the slider to move on the fixed slide rod, but due to the tension spring between the connecting bolt and the limit rod, the slider can be quickly reset, which can just offset the tension of the steel belt, making the steel belt more stable during transportation; at the same time, a locking block is relatively fixed on the support rod, and the position of the locking block can be adjusted according to the different widths of the steel belt, which can also make the steel belt more stable during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 This is a schematic diagram of the structure of a steel strip expansion device for key production according to the utility model;

[0012] Figure 2 It is a schematic diagram of a locking block relatively fixed on a sleeve in a steel band expansion device for key production according to the utility model.

[0013] Figure 1-2 Middle: 1-fixed slide rod, 2-sliding block, 3-locking block, 4-support rod, 5-sleeve, 6-connecting bolt, 7-limit rod, 8-tension spring, 9-locking bolt, 10-steel belt. DETAILED DESCRIPTION

[0014] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0015] See also Figure 1 and Figure 2 As shown, a steel strip expansion device for key production includes a fixed slide bar 1 installed on a punch press and a slider 2 slidably connected to the fixed slide bar 1, a support rod 4 and a connecting bolt 6 are fixed to the slider 2, a limit rod 7 is fixed to the right end of the fixed slide bar 1, a tension spring 8 is also provided between the slider 2 and the limit rod 7, one end of the tension spring 8 is sleeved on the connecting bolt 6, and the other end bypasses the limit rod 7 and is sleeved on the connecting bolt 6, and a locking block 3 is relatively fixed on the support rod 4.

[0016] The support rod 4 is fixed vertically on the slider 2. The support rod 4 is fixed vertically on the slider 2 so that the side of the steel belt 10 is more closely attached to the outer circumference of the sleeve 5 on the support rod 4, and the transmission is more stable. A sleeve 5 is also fixed on the outer circumference of the support rod 4. The locking block 3 is sleeved on the sleeve 5. The locking block 3 is also threadedly connected with a locking bolt 9. After the locking bolt 9 is threadedly locked with the locking block 3, its end penetrates the locking block 3 and is set in contact with the sleeve 5. The support rod 4 is an iron part and can be directly welded and fixed on the slider 2. Then, the sleeve 5 is sleeved on the outside of the support rod 4. The sleeve 5 is a hollow tube made of stainless steel. After its surface contacts the steel belt 10, it will not damage the surface of the steel belt 10. If the support rod 4 directly contacts the steel belt 10, the support rod 4 will directly scratch the surface of the steel belt 10 after rusting. Therefore, the sleeve 5 can prevent scratches on the surface of the steel belt 10. The locking block 3 is a butterfly-shaped structure, and the diameter of the outer end is larger than the diameter of the inner end. This structure of the locking block 3 can increase the contact surface with the side of the steel belt 10 when the distance is adjusted left and right on the support rod 4.

[0017] In this embodiment, the steel strip 10 is first output from the rolled steel strip coil, and the output steel strip 10 bypasses the sleeve 5 from bottom to top and hits the outer surface of the sleeve 5. After bypassing, the upper end side of the steel strip 10 is sent into the punching machine for stamping and forming. The steel strip 10 will generate a pulling force in the process of transportation. Therefore, after the steel strip 10 hits the sleeve 5 and is pulled inward, the slider 2 slides a certain distance to the left on the fixed slide rod 1, but due to the action of the tension spring 8, the slider 2 will immediately return to its position, which can well offset the pulling force generated by the steel strip 10 in the process of transportation, so that the steel strip 10 is more stable during transportation. At the same time, the locking block 3 on the sleeve 5 can be adjusted inward and outward along the direction of the sleeve 5. Therefore, it is suitable for offsetting the tension of steel strips 10 of different widths.

[0018] The above embodiment is only an example of the present invention and is not intended to limit the implementation and scope of rights of the present invention. Any technical solution that is identical or equivalent to the content described in the claims of the present invention should be included in the protection scope of the present invention.

Claims

1. A steel band expansion device for key production, characterized in that: It includes a fixed slide rod installed on the punch press and a slider slidably connected to the fixed slide rod, a support rod and a connecting bolt are fixed on the slider, a limiting rod is fixed on the right end of the fixed slide rod, and a tension spring is also provided between the slider and the limiting rod, one end of the tension spring is sleeved on the connecting bolt, and the other end is sleeved on the connecting bolt after bypassing the limiting rod, and a locking block is relatively fixed on the support rod.

2. A steel band expansion device for key production according to claim 1, characterized in that: The support rod is vertically fixed on the sliding block.

3. The steel strip expansion device for key production according to claim 1, characterized in that: A sleeve is also fixed on the outer circumferential side of the support rod, the locking block is sleeved on the sleeve, and a locking bolt is threadedly connected to the locking block. After the locking bolt and the locking block are threadedly locked, the end of the locking bolt passes through the locking block and is set to abut against the sleeve.

4. A steel band expansion device for key production according to claim 1 or 3, characterized in that: The locking block is in a butterfly-shaped structure, and the diameter of the outer end is larger than the diameter of the inner end.

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