Bushing type stripping structure for guide pin of die

Abstract

The utility model discloses a die guide pin bushing type stripping structure which comprises an upper die assembly and a lower die assembly, the upper die assembly comprises an upper die base, an upper fixing plate, a back stripping plate and a stripping plate, the lower die assembly comprises a lower die base and a lower die plate, the upper fixing plate is provided with a punch, the lower die plate is correspondingly provided with a forming hole, and the back stripping plate is provided with a plurality of guide pin mechanisms. The punch and the multiple guide needle mechanisms are sequentially and uniformly distributed, each guide needle mechanism comprises a guide needle and a stripping bush, the stripping bush is connected with the back stripping plate through a first spring, the guide needle is vertically connected with the back stripping plate and coaxially penetrates through the stripping bush, and in an initial state, the stripping bush downwards protrudes out of the stripping plate, and the guide needle is provided with a conical needle head protruding out of the stripping bush; a plurality of floating material bushings are arranged in the lower die plate and connected with the lower die base through second springs, the elastic force of the second springs is larger than that of the first springs, the floating material bushings are matched with the guide needles respectively, the floating material bushings right face the stripping bushings, and positioning and stripping can be smoothly completed.

Description

Technical Field

[0001] The utility model relates to the technical field of stripping structures, in particular to a mold guide needle bushing type stripping structure. Background Art

[0002] In a progressive die, or continuous die, a positioning pin hole is pre-punched at the front of the material strip during stamping, and then the upper die moves downward, and the guide pin is preferentially inserted into the positioning pin hole on the material strip, which plays a role in accurately guiding and positioning the material strip.

[0003] However, for products with thinner and softer material strips, the overall rigidity of the material strip is relatively weak. During the production process, the material strip often moves with the upper mold because the guide needle does not remove the material when guiding the material strip, which will cause the production line to stop. In severe cases, the mold can be easily damaged due to material strip misalignment, and mold splashes can easily cause injuries. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a mold guide needle bushing type stripping structure, which is used to strip a material strip in a continuous mold, including an upper mold assembly and a lower mold assembly, wherein the upper mold assembly includes an upper mold base, an upper fixed plate, a back stripping plate and a stripping plate connected in sequence from top to bottom, wherein the upper fixed plate and the back stripping plate are elastically connected by an equal height sleeve and a spring, wherein the lower mold assembly includes a lower mold base and a lower mold plate connected to the top of the lower mold base, the upper fixed plate is equipped with a punch extending vertically downward, the back stripping plate and the stripping plate are connected to The punch is clearance-matched, and a plurality of guide needle mechanisms are installed at the bottom of the back stripping plate. In the conveying direction of the material belt, the punch and the plurality of guide needle mechanisms are evenly distributed in sequence, and the punch is located at the end. The guide needle mechanism includes a guide needle and a T-shaped stripping bushing. The stripping bushing is elastically connected to the back stripping plate through a first spring. The guide needle is vertically fixedly connected to the back stripping plate and coaxially penetrates the stripping bushing. In the initial state, the stripping bushing protrudes downward from the stripping plate, and the guide needle has a conical needle head protruding from the stripping bushing.

[0005] The lower template is provided with a forming hole matched with the punch, and a plurality of float bushings extending in the vertical direction are provided in the lower template. The float bushings are elastically connected to the lower die base through a second spring, and the elastic force of the second spring is greater than the elastic force of the first spring. The plurality of float bushings are respectively matched with the plurality of guide needles, and are provided with avoidance channels for the guide needles to pass through, and the sleeve of the float bushing is opposite to the stripping bushing.

[0006] According to one embodiment of the utility model, a first spring cavity and a stripping channel are provided in the stripping plate corresponding to the stripping bushing, wherein the first spring cavity cooperates with the head of the stripping bushing, and the stripping channel cooperates with the sleeve portion of the stripping bushing, and the first spring sleeve is arranged on the guide needle, and abuts against the head of the stripping bushing and the back stripping plate at both ends.

[0007] According to one embodiment of the utility model, the float bushing is in an inverted T-shape, including a limit head and a float sleeve connected to the top of the limit head, wherein the float sleeve and the lower template are clearance-matched, the limit head abuts against the bottom of the lower template, and a second spring cavity for placing the second spring is opened in the lower mold base corresponding to the float bushing, and the two ends of the second spring respectively abut between the limit head and the bottom wall of the second spring cavity.

[0008] According to an embodiment of the utility model, a lower pad is further provided between the lower die base and the lower die plate, a transition channel is provided in the lower pad corresponding to the second spring cavity, and the second spring runs through the transition channel.

[0009] Beneficial effect: The mold guide needle bushing type stripping structure provided in the present application is based on the conventional guide needle structure by adding a stripping bushing and a floating bushing, and at the same time the elastic force of the second spring connected to the floating bushing is greater than the elastic force of the first spring connected to the stripping bushing. When the mold is closed, the floating bushing first pushes the stripping bushing into the stripping plate, so that the guide needle can be inserted into the material strip to complete the positioning. After the stamping is completed, when the upper mold leaves the material strip, the stripping bushing pushes the material strip away from the stripping plate and the guide needle under the action of the spring force, thereby successfully completing the positioning and stripping work. It has a simple structure and low cost, can effectively improve work efficiency and ensure product quality.

[0010] These and other purposes, features and advantages of the present invention are fully reflected in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A cross-sectional structural schematic diagram of a mold guide needle sleeve type stripping structure according to a preferred embodiment of the present application is shown.

[0012] Figure 2 Shows this application Figure 1 Schematic diagram of the enlarged structure of part A.

[0013] Figure 3 A partial top view schematic diagram of a mold guide needle sleeve type stripping structure of a preferred embodiment of the present application is shown. DETAILED DESCRIPTION

[0014] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0015] Those skilled in the art should understand that, in the disclosure of the specification, the orientation or position relationship indicated by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0016] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0017] refer to Figures 1 to 3 , a mold guide needle bushing stripping structure according to a preferred embodiment of the utility model will be described in detail below, wherein the mold guide needle bushing stripping structure is used to strip the material strip 30 in the continuous mold, wherein the mold guide needle bushing stripping structure includes an upper mold assembly 10 and a lower mold assembly 20. The upper mold assembly 10 includes an upper mold base 11, an upper fixed plate 12, a back stripping plate 13 and a stripping plate 14 connected in sequence from top to bottom, wherein the upper fixed plate 12 and the back stripping plate 13 are elastically connected by an equal height sleeve and a spring, wherein the equal height sleeve can ensure the accuracy of the up and down movement of the back stripping plate 13 and the accuracy of the downward movement distance, and ensure that the back stripping plate 13 can always remain in the horizontal extension direction, wherein the spring enables the back stripping plate 13 to be pulled away from the upper fixed plate by gravity in the initial state, and when the mold is closed, the spring will be squeezed to drive the back stripping plate 13 to move upward in a directional manner, which belongs to a conventional guide needle structure. Due to the relationship between the screenshot position, Figure 1 The contour sleeve and spring are not shown.

[0018] The lower die assembly 20 includes a lower die base 21 and a lower die plate 23 connected to the top of the lower die base 21 .

[0019] The upper fixed plate 12 is provided with a punch 15 extending vertically downward, and the back stripping plate 13 and the stripping plate 14 are clearance-matched with the punch 15. Accordingly, the lower template 23 is provided with a forming hole 201 matching with the punch 15, so as to complete the punching of the material strip 30. In addition, a plurality of guide needle mechanisms 40 are installed at the bottom of the back stripping plate 13, and in the conveying direction α of the material strip 30, the punch 15 and the plurality of guide needle mechanisms 40 are uniformly distributed in sequence, and the punch 15 is located at the end. The guide needle mechanism 40 includes a guide needle 41 and a T-shaped stripping bushing 42, wherein the stripping bushing 42 is elastically connected to the back stripping plate 13 through a first spring 43, wherein the guide needle 41 is vertically fixedly connected to the back stripping plate 13 and coaxially penetrates the stripping bushing 42, and at the same time, in the initial state, the stripping bushing 42 protrudes downward from the stripping plate 14, and the guide needle 41 has a conical needle head 411 protruding from the stripping bushing 42. Correspondingly, a plurality of floating bushings 24 capable of elastically moving in the vertical direction are arranged in the lower mold plate 23, wherein the floating bushings 24 are elastically connected to the lower mold seat 21 through a second spring 25, and the elastic force of the second spring 25 is greater than the elastic force of the first spring 43, and at the same time, the plurality of floating bushings 24 are respectively matched with the plurality of guide needles 41, and a avoidance channel 202 for the guide needle 41 to pass through is arranged, and the sleeve of the floating bushing 24 is directly opposite to the stripping bushing 42.

[0020] Since the elastic force of the second spring 25 is greater than the elastic force of the first spring 43, during the closing process of the upper mold assembly 10 and the lower mold assembly 20, the floating bushing 24 will first push the stripping bushing 42 into the stripping plate 14, and the upper mold assembly 10 will continue to move downward, so that the guide needle 41 can be inserted into the material strip 30 and finally inserted into the avoidance channel 201. After completing the stamping, the upper mold assembly 10 leaves the material strip 30. Under the spring force of the first spring 43, the stripping bushing 42 pushes the material strip 30 away from the stripping plate 14. Since the outer diameter of the conical needle 411 is smaller than the aperture size of the material strip 30, the material strip 30 will automatically detach from the guide needle 41, so that the positioning and stripping work can be completed at the same time. Therefore, the stripping structure provided by the present application can effectively ensure work efficiency and processing quality, avoid the material strip from being misplaced and damaging the mold, and improve work safety.

[0021] In one embodiment, a first spring cavity 101 and a stripping channel 102 are provided in the stripping plate 14 corresponding to the stripping sleeve 42, wherein the first spring cavity 101 cooperates with the head 421 of the stripping sleeve 42, wherein the stripping channel 102 cooperates with the sleeve portion 422 of the stripping sleeve 42, and at the same time, the first spring 43 is sleeved on the guide needle 41, and abuts against the head of the stripping sleeve 42 and the back stripping plate 13 at both ends, so that the stripping sleeve 42 can be limited by the cooperation of the first spring cavity 101 and the stripping channel 102, so that the stripping sleeve 42 will not be separated from the stripping plate 14, and at the same time, a certain up and down moving travel space can be provided for the stripping sleeve 42, which is convenient to use and easy to maintain.

[0022] In one embodiment, the floating bushing 24 is in an inverted T-shape, including a limiting head 241 and a floating sleeve 242 connected to the top of the limiting head 241, wherein the floating sleeve 242 and the lower template 23 are in clearance fit, wherein the limiting head 241 abuts against the bottom of the lower template 23, so that the floating sleeve 24 can be limited by the lower template 23 to prevent the floating bushing 24 from moving upward and detaching from the lower template 23. In addition, a second spring cavity 203 for placing the second spring 25 is provided in the lower die seat 21 corresponding to the floating bushing 24, and at the same time, the two ends of the second spring 25 abut between the limiting head 241 and the bottom wall of the second spring cavity 203, so that the second spring 25 provides buoyancy to the floating bushing, which can not only push the stripping sleeve 242 into the stripping plate, but also play the role of floating the material belt 30, balancing and stabilizing the material belt 30.

[0023] Further preferably, a lower pad 22 is provided between the lower die base 21 and the lower die plate 23, and a transition channel is provided in the lower pad 22 corresponding to the second spring cavity 203, and the second spring 25 passes through the transition channel, thereby facilitating the installation and maintenance of the float bushing 24 through the lower pad 22, and at the same time, the up and down movement stroke of the float bushing 24 can be further increased, making it more convenient to use.

[0024] It should be noted that the terms "first, second" in the present invention are only used for descriptive purposes and do not indicate any order. They cannot be understood as indicating or implying relative importance. These terms can be interpreted as names.

[0025] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A mold guide needle bushing stripping structure, used for stripping a material strip in a continuous mold, comprising an upper mold assembly and a lower mold assembly, wherein the upper mold assembly comprises an upper mold base, an upper fixed plate, a back stripping plate and a stripping plate connected in sequence from top to bottom, wherein the upper fixed plate and the back stripping plate are elastically connected by an equal height sleeve and a spring, wherein the lower mold assembly comprises a lower mold base and a lower mold plate connected to the top of the lower mold base, characterized in that: The upper fixed plate is equipped with a punch extending vertically downward, the back stripping plate and the stripping plate are in gap fit with the punch, a plurality of guide needle mechanisms are installed at the bottom of the back stripping plate, in the conveying direction of the material belt, the punch and the plurality of guide needle mechanisms are evenly distributed in sequence, and the punch is located at the end, the guide needle mechanism includes a guide needle and a T-shaped stripping bushing, the stripping bushing is elastically connected to the back stripping plate through a first spring, the guide needle is vertically fixedly connected to the back stripping plate, and coaxially penetrates the stripping bushing, in the initial state, the stripping bushing protrudes downward from the stripping plate, and the guide needle has a conical needle head protruding from the stripping bushing; The lower template is provided with a forming hole matched with the punch, and a plurality of float bushings extending in the vertical direction are provided in the lower template. The float bushings are elastically connected to the lower die base through a second spring, and the elastic force of the second spring is greater than the elastic force of the first spring. The plurality of float bushings are respectively matched with the plurality of guide needles, and are provided with avoidance channels for the guide needles to pass through, and the sleeve of the float bushing is opposite to the stripping bushing.

2. The mold guide needle bushing stripping structure according to claim 1, characterized in that: A first spring cavity and a stripping channel are provided in the stripping plate corresponding to the stripping sleeve, wherein the first spring cavity cooperates with the head of the stripping sleeve, and the stripping channel cooperates with the sleeve portion of the stripping sleeve. The first spring is sleeved on the guide needle and abuts against the head of the stripping sleeve and the back stripping plate at both ends.

3. The mold guide needle bushing stripping structure according to claim 1, characterized in that: The float bushing is in an inverted T-shape, including a limit head and a float sleeve connected to the top of the limit head, wherein the float sleeve and the lower template are clearance-matched, the limit head abuts against the bottom of the lower template, and a second spring cavity for placing the second spring is opened in the lower template seat corresponding to the float bushing, and the two ends of the second spring respectively abut between the limit head and the bottom wall of the second spring cavity.

4. The mold guide needle bushing stripping structure according to claim 3, characterized in that: A lower pad is further provided between the lower die base and the lower die plate, a transition channel is provided in the lower pad corresponding to the second spring cavity, and the second spring runs through the transition channel.

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