A cold heading die for boxcar locks

Abstract

A cold heading processing die for a boxcar lock comprises five die groups arranged at intervals on the left and right, each die group comprises a bottom die, a punch and a push rod; the bottom die is a horizontally arranged truncated cone, a through slot is provided at the center of the bottom die, an ear plate is provided at the rear side of the bottom die, the ear plate is provided with a mounting hole, a through hole is provided at the ear plate corresponding to the through slot, and a guide cylinder is provided at the rear side of the ear plate corresponding to the through hole; the punch and the push rod are both in the shape of long strips, the punches are all located in front of the bottom die, the push rods are all located behind the bottom die, and they are all directly opposite to the bottom die through slots at corresponding positions, and each punch is provided with a clamping part at the front side and the push rod at the rear side; wherein, the bottom die notches of the first to fourth die groups are rectangular, the bottom die notches of the fifth die group are square, and a cone head is provided on the rear side of the punch of the fourth die group. By adopting the cold heading processing technology of the die, the raw materials are processed and formed at one time, the production cycle is greatly shortened, and the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a cold heading processing die for a boxcar lock. Background Art

[0002] The boxcar lock is generally a square flat block, see Figure 1 A lock hole 1 is provided on its side. During processing, it is necessary to first process the outer shape of the lock body of the square flat block according to the needs, and then drill the hole by special equipment. For details about the drilling, please refer to Chinese patents CN104057117A and CN104070209A. The existing process is cumbersome and inefficient. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a cold heading processing die for a boxcar lock, through which the raw materials are processed and formed at one time by adopting a cold heading processing technology, the production cycle is greatly shortened, and the efficiency is improved.

[0004] In order to solve the above technical problems, the utility model provides a cold forging processing die for a boxcar lock, comprising five die groups, which are arranged horizontally and spaced equidistantly in the left and right directions, and are sequentially recorded as a first die group, a second die group, a third die group, a fourth die group and a fifth die group from left to right;

[0005] Each die set includes a bottom die, a punch, and a ejector pin;

[0006] The bottom mold is generally in the shape of a truncated cone, the axis direction of the bottom mold truncated cone is forward and backward, and the bottom surface area of ​​the front side of the truncated cone is small, and the bottom surface area of ​​the rear side is large. A through groove penetrating the truncated cone along the axis direction is provided at the center of the bottom mold, and an ear plate for installing the bottom mold is provided at the rear side of the bottom mold. The ear plate is abutted against the rear side of the bottom mold, and a mounting hole penetrating the ear plate along the forward and backward direction is provided at the part of the ear plate that exceeds the bottom mold in the circumferential direction. A through hole penetrating the ear plate along the forward and backward direction is provided at the middle position of the ear plate corresponding to the through groove, and the size of the through hole is sufficient to cover the notch of the through groove, and a guide cylinder matching the through hole and extending horizontally backward is provided at the rear side of the ear plate corresponding to the through hole;

[0007] The punch is in the shape of a horizontally arranged long strip, with the length direction being front-to-back, and the punches are all located in front of the bottom die and are directly opposite to the bottom die through slot at the corresponding position, and the rear side of the punch is a vertically arranged plane, and the shape and size of the rear side of the punch match the shape and size of the notch of the through slot on the bottom die at the corresponding position, and each punch is provided with a first clamping portion on the front side;

[0008] The ejector rods are in the shape of horizontally arranged long strips, with the length direction being front-to-back, and are all located behind the bottom mold and facing the bottom mold through slots at corresponding positions. The front side of the ejector rods is a vertically arranged plane, and the shape and size of the front side of the ejector rods match the shape and size of the notch of the through slot on the bottom mold at the corresponding position, and a second clamping portion is provided on the rear side of each ejector rod;

[0009] Among them, the bottom die slots of the first die group, the second die group, the third die group, and the fourth die group are all rectangular in shape, the bottom die slot of the fifth die group is square in shape, and a protruding cone head extending horizontally backward is provided in the middle area of ​​the rear side surface of the punch of the fourth die group.

[0010] For the purpose of briefly explaining the problem, the cold heading processing mold for the boxcar lock described in the present utility model is referred to as this mold for short.

[0011] The method of using the mold is as follows: the bottom molds, ejector pins and punches of all mold groups are fixed on three racks respectively, and the position relationship corresponds to each other. The racks corresponding to the ejector pins and punches are connected to a hydraulic system. First, the ejector pin enters the through slot of the bottom mold from the rear side to complete the positioning. Then, the shearing equipment shears the round steel material into a suitable flat sheet. The manipulator loads the material into the through slot of the bottom mold of the first mold group from the front side (enters from the side of the round flat sheet workpiece). Then, the hydraulic system controls the punch to hit the workpiece to complete the first cold heading shaping. After the punch is reset, the hydraulic system controls the ejector pin. Move forward to push the workpiece out of the slot, and the manipulator clamps it and rotates it 90° to continue entering the slot of the bottom die of the second die group. Repeat the above operations to perform cold heading and shaping operations until entering the fourth die group. Since the punch of the fourth die group is provided with a cone head, the hole opening work can be completed while completing the shaping of the workpiece. After four cold heading processes, it has been shaped into a square shape, and finally turned over to enter the slot of the bottom die of the fifth die group (the square flat sheet workpiece enters from the front). After the last cold heading in the fifth die group, the boxcar lock processing is completed.

[0012] Advantages of this mold: Compared with the existing technology, this mold is combined with the cold heading process. The boxcar lock can be processed and formed in one time without two processes, which saves time. Moreover, new material can be fed in synchronously after each mold group discharges the material. That is, each time the frame where the punch is located is working under the control of the hydraulic system, there are workpieces that need to be cold headed in the five mold groups. They are in different processes and can discharge materials continuously, which greatly improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Structural diagram of existing boxcar lock.

[0014] Figure 2 It is a schematic diagram of the structure of the mold in a top view.

[0015] Figure 3This is the main view of the bottom mold in the first to fourth mold groups in this mold.

[0016] Figure 4 It is a top view of the bottom mold in the first to fourth mold groups in this mold.

[0017] Figure 5 This is the main view of the bottom mold in the fifth mold group in this mold.

[0018] Figure 6 It is a top view of the bottom mold in the fifth mold group in this mold.

[0019] Figure 7 It is a top view of the punch in the first to third die sets or the ejector pin in the first to fourth die sets in this die.

[0020] Figure 8 yes Figure 7 A-direction view.

[0021] Fig. 9 It is a top view of the punch in the fourth die set in this die.

[0022] Fig.10 yes Fig. 9 B view.

[0023] Fig.11 It is a top view of the punch or ejector pin in the fifth die set in this die.

[0024] Fig.12 yes Fig.11 C-direction view. DETAILED DESCRIPTION

[0025] See also Figure 1-Figure 12 In this embodiment, some punches and ejector pins in each die group adopt the same structure. For the sake of simple explanation, they are not shown separately in the drawings. Only the different parts, such as the punch of the fourth die group and the punch and ejector pin of the fifth die group, are shown separately.

[0026] A cold forging die for a boxcar lock comprises five die groups, which are arranged horizontally and spaced equidistantly from left to right, and are marked as a first die group 21, a second die group 22, a third die group 23, a fourth die group 24 and a fifth die group 25 from left to right;

[0027] Each die set includes a bottom die 3, a punch 4, and a push rod 5;

[0028] The bottom mold 3 is generally in the shape of a truncated cone, the axis direction of the truncated cone of the bottom mold 3 is forward and backward, and the bottom surface area of ​​the front side of the truncated cone is small, and the bottom surface area of ​​the rear side is large. A through groove 31 penetrating the truncated cone along the axis direction is provided at the center of the bottom mold 3, and an ear plate 32 for mounting the bottom mold 3 is provided at the rear side of the bottom mold 3. The ear plate 32 is abutted against the rear side of the bottom mold 3, and a mounting hole 321 penetrating the ear plate 32 in the front-to-back direction is provided at the part of the ear plate 32 that exceeds the bottom mold 3 in the circumferential direction. A through hole 322 penetrating the ear plate 32 in the front-to-back direction is provided at the middle position of the ear plate 32 corresponding to the through groove 31, and the size of the through hole 322 is sufficient to cover the notch of the through groove 31, and a guide cylinder 33 matching the through hole 322 and extending horizontally backward is provided at the rear side of the ear plate 32 corresponding to the through hole 322;

[0029] The punch 4 is in the shape of a horizontally arranged long strip, with the length direction being front-to-back, and the punches 4 are all located in front of the bottom die 3 and are directly opposite to the through slots 31 of the bottom die 3 at the corresponding positions, and the rear side of the punch 4 is a vertically arranged plane, and the shape and size of the rear side of the punch 4 match the shape and size of the notch of the through slot 31 on the bottom die 3 at the corresponding position, and each punch 4 is provided with a first clamping portion 41 at the front side;

[0030] The push rods 5 are in the shape of horizontal long strips, with the length direction being front-to-back. The push rods 5 are all located behind the bottom mold 3 and are directly opposite to the through slots 31 of the bottom mold 3 at the corresponding positions. The front side of the push rods 5 is a vertically arranged plane, and the shape and size of the front side of the push rods 5 match the shape and size of the notch of the through slots 31 on the bottom mold 3 at the corresponding positions. A second clamping portion 51 is provided on the rear side of each push rod 5;

[0031] Among them, the notch shape of the bottom mold 3 of the first mold group 21, the second mold group 22, the third mold group 23, and the fourth mold group 24 are all rectangular, the notch shape of the bottom mold 3 of the fifth mold group 25 is square, and the middle area of ​​the rear side surface of the punch 4 of the fourth mold group 24 is provided with a protruding cone head 411 extending horizontally backward.

[0032] The method of using the mold is as follows: the bottom mold 3, the ejector rod 5 and the punch 4 of all mold groups are fixed on three frames respectively, and the position relationship corresponds to each other. The frames corresponding to the ejector rod 5 and the punch 4 are connected to a hydraulic system. First, the ejector rod 5 enters the through slot 31 of the bottom mold 3 from the rear side to complete the positioning, and then the shearing device shears the round steel material into a suitable flat sheet, and the manipulator is loaded into the through slot 31 of the bottom mold 3 of the first mold group 21 (entering from the side of the round flat sheet workpiece), and then the hydraulic system controls the punch 4 to hit the workpiece to complete the first cold heading shaping (this embodiment only shows the mold part, wherein the frame, the clamping mechanism, the hydraulic system, the manipulator, the shearing device, the control system, etc. belong to conventional mechanical well known to those skilled in the art) Processing equipment, in this embodiment and the accompanying drawings, no detailed description is made), after the punch 4 is reset, the hydraulic system controls the push rod 5 to move forward to push the workpiece out of the through slot 31, and the workpiece is clamped by the manipulator and rotated 90° to continue to enter the through slot 31 of the bottom die 3 of the second die group 22, and the above operation is repeated to perform cold heading and shaping operations until entering the fourth die group 24. Since the punch 4 of the fourth die group 24 is provided with a cone head 411, the hole opening work can be completed while completing the workpiece shaping. After four cold heading processes, it has been shaped into a square shape, and finally turned over to enter the through slot 31 of the bottom die 3 of the fifth die group 25 (the square flat sheet workpiece enters from the front), and the boxcar lock processing is completed after the last cold heading discharge in the fifth die group 25.

[0033] Advantages of this mold: Compared with the existing technology, this mold is combined with the cold heading process. The boxcar lock can be processed and formed in one time without two processes, which saves time. Moreover, new material can be input synchronously after each mold group in this mold discharges the material. That is, each time the frame where the punch 4 is located is working under the control of the hydraulic system, there are workpieces that need to be cold headed in the five mold groups. They are in different processes and can discharge materials continuously, which greatly improves production efficiency.

Claims

1. A cold heading die for a boxcar lock, characterized in that: The invention comprises five mold groups, which are arranged horizontally and spaced equidistantly in the left-right direction, and are respectively recorded as the first mold group, the second mold group, the third mold group, the fourth mold group and the fifth mold group from left to right; Each die set includes a bottom die, a punch, and a ejector pin; The bottom mold is generally in the shape of a truncated cone, the axis direction of the bottom mold truncated cone is forward and backward, and the bottom surface area of ​​the front side of the truncated cone is small, and the bottom surface area of ​​the rear side is large. A through groove penetrating the truncated cone along the axis direction is provided at the center of the bottom mold, and an ear plate for installing the bottom mold is provided at the rear side of the bottom mold. The ear plate is abutted against the rear side of the bottom mold, and a mounting hole penetrating the ear plate along the forward and backward direction is provided at the part of the ear plate that exceeds the bottom mold in the circumferential direction. A through hole penetrating the ear plate along the forward and backward direction is provided at the middle position of the ear plate corresponding to the through groove, and the size of the through hole is sufficient to cover the notch of the through groove, and a guide cylinder matching the through hole and extending horizontally backward is provided at the rear side of the ear plate corresponding to the through hole; The punch is in the shape of a horizontally arranged long strip, with the length direction being front-to-back, and the punches are all located in front of the bottom die and are directly opposite to the bottom die through slot at the corresponding position, and the rear side of the punch is a vertically arranged plane, and the shape and size of the rear side of the punch match the shape and size of the notch of the through slot on the bottom die at the corresponding position, and each punch is provided with a first clamping portion on the front side; The ejector rods are in the shape of horizontally arranged long strips, with the length direction being front-to-back, and are all located behind the bottom mold and facing the bottom mold through slots at corresponding positions. The front side of the ejector rods is a vertically arranged plane, and the shape and size of the front side of the ejector rods match the shape and size of the notch of the through slot on the bottom mold at the corresponding position, and a second clamping portion is provided on the rear side of each ejector rod; Among them, the bottom die slots of the first die group, the second die group, the third die group, and the fourth die group are all rectangular in shape, the bottom die slot of the fifth die group is square in shape, and a protruding cone head extending horizontally backward is provided in the middle area of ​​the rear side surface of the punch of the fourth die group.

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