Shoe tree and shoe tree finish machining positioning device
By designing positioning grooves and positioning heads on the shoe last, and combining a positioning power source and an infrared laser probe, the problem of positioning the shoe last on a lathe was solved, achieving high-precision and high-efficiency finishing, and improving the processing quality and production efficiency of the shoe last.
Patent Information
- Application Number
- CN202422937603.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-29
AI Technical Summary
The positioning difficulties and material properties of existing shoe lasts during lathe finishing processes result in insufficient machining accuracy and low production efficiency. Traditional positioning methods cannot effectively resist the movement or deflection of shoe lasts caused by cutting forces, affecting machining quality and equipment safety.
Design a shoe last body with corresponding positioning grooves, in conjunction with positioning supports and positioning heads. Use a positioning power source to drive the positioning heads to move relative to each other, and combine infrared laser probes to detect positioning accuracy to achieve stable positioning. The stable movement of the positioning heads is ensured by guide grooves and push blocks.
It has achieved stable precision machining of shoe lasts, improved processing accuracy and production efficiency, ensured equipment safety, and met the quality requirements of high-end footwear.
Smart Images
Figure CN223489252U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a shoe last and a precision positioning device for such shoe last. Background Technology
[0002] As an indispensable key tool in the footwear manufacturing industry, the shape and size of the shoe last directly determine the comfort and appearance of the shoe. Traditionally, the shoe last making process first relies on shoe last molds for preliminary shaping. Although this step can roughly replicate the basic outline of the shoe last, it is often difficult to achieve the precise dimensions and surface finish required by the design due to limitations in mold manufacturing precision, material shrinkage rate, and other uncontrollable factors in the molding process.
[0003] To improve the precision and quality of shoe lasts and meet the increasingly stringent demands of the high-end footwear market, subsequent finishing processes are particularly important. In current industry practice, this finishing process largely relies on lathe machining, which is widely used for the fine grinding and finishing of various workpieces due to its high precision and flexibility. However, lathe machining presents significant challenges for shoe lasts, which have a unique shape.
[0004] Specifically, shoe lasts have complex and varied shapes, often containing multiple curved surfaces and irregular shapes, making stable and precise positioning on a lathe particularly difficult. Traditional positioning methods, such as fixing the last from the bottom, while seemingly simple and direct, are prone to problems during actual processing. Due to the cutting force of the lathe tool on the shoe last material during machining, bottom-fixing methods often cannot effectively resist the upward movement or deflection of the last caused by this external force, resulting in decreased machining accuracy and potentially damaging the last or lathe equipment, severely impacting production efficiency and product quality.
[0005] Furthermore, the diversity of shoe last materials increases the complexity of lathe machining. Different shoe last materials differ in terms of machinability and thermal deformation characteristics, requiring adjustments to machining parameters based on specific circumstances to ensure both machining effectiveness and safety.
[0006] In summary, the current finishing process of shoe lasts on lathes suffers from problems such as insufficient processing accuracy and low production efficiency due to limitations in positioning and material properties. There is an urgent need for a more efficient and precise processing method and device to solve these problems and meet the footwear manufacturing industry's demand for high-quality shoe lasts. Summary of the Invention
[0007] In view of the shortcomings of the existing technology, this utility model innovatively provides a shoe last that is easy to position and a shoe last precision machining and positioning device for positioning such a shoe last.
[0008] This shoe last includes a shoe last body, which has two side support surfaces, characterized in that: the two side support surfaces have two opposing positioning grooves, and the diameter of the two positioning grooves gradually decreases from the outside to the inside.
[0009] This shoe last precision machining positioning device is characterized in that: it is used to position the shoe last mentioned above, and includes a positioning support and a positioning power source. The positioning support is provided with two positioning heads that can move relative to each other. The outer diameter of the positioning heads is gradually decreasing from one end to the other end. One positioning head matches one positioning groove of the shoe last, and the other positioning head matches another positioning groove of the shoe last. The positioning power source can drive the two positioning heads to move relative to each other.
[0010] The positioning support is provided with a guide groove, the positioning head is connected to the slider, and the slider is slidably disposed in the guide groove.
[0011] The positioning power source is a cylinder, and each slider is connected to a cylinder for transmission.
[0012] The positioning support is provided with a push block, which is connected to the positioning power source. The push block has two push parts, each with a push inclined surface. The slider has a force-receiving inclined surface. The push inclined surface of the push part can act on the force-receiving inclined surface of the slider, causing the two sliders to move relative to each other. The slider can be reset under the action of a spring.
[0013] It includes an infrared laser probe, which is used to detect whether the shoe last is located at the positioning point between the two positioning heads.
[0014] The shoe last and shoe last precision processing positioning device provided by this utility model can not only realize the convenient positioning of the shoe last, but also perform stable precision processing on the shoe last after positioning. Attached Figure Description
[0015] Figure 1 To make the shoe last three-dimensional Figure 1 ;
[0016] Figure 2 To make the shoe last three-dimensional Figure 2 ;
[0017] Figure 3 One method for implementing a positioning device for precision machining of shoe lasts;
[0018] Figure 4 Implementation 2 for the positioning device for precision machining of shoe lasts;
[0019] Figure 5 for Figure 4 A sectional view;
[0020] Figure 6This is a 3D view of the two positioning heads. Detailed Implementation
[0021] like Figure 1 and Figure 2 As shown, this shoe last includes a shoe last body, which has two side support surfaces, left and right. On the two side support surfaces, there are two opposing positioning grooves 10, and the diameter of the two positioning grooves 10 gradually decreases from the outside to the inside.
[0022] In order to position this type of shoe last, such as Figure 3 and Figure 4 As shown, this utility model provides a shoe last precision processing positioning device, which is used to position the shoe last 1 mentioned above.
[0023] This shoe last precision machining positioning device includes a positioning support 2 and a positioning power source 6. The positioning support 2 is equipped with two positioning heads 3 that can move relative to each other. Figure 6 As shown, the outer diameter of the positioning head 3 gradually decreases from one end to the other. One positioning head 3 matches one positioning groove 10 of the shoe last 1, and the other positioning head 3 matches another positioning groove 10 of the shoe last 1. The positioning power source 6 can drive the two positioning heads 3 to move relative to each other.
[0024] The working principle of this shoe last precision machining positioning device is as follows: During operation, the shoe last 1 is placed on the positioning support 2, and the positioning power source 6 drives the two positioning heads 3 to move relative to each other. This causes the two positioning heads 3 to enter the two positioning grooves 10 of the shoe last 1. Figure 5 As shown, when the two positioning heads 3 are clamped, the shoe last 1 will not move left or right because it is restricted in the left-right direction by the two positioning heads 3. Since the positioning heads 3 match the positioning grooves 10 of the shoe last 1, and the outer circle of the matching surface is smaller on the inside and larger on the outside, the shoe last 1 will not move in any other direction either, thus the shoe last 1 is completely positioned. Under these conditions, the lathe can ensure stable operation when performing precision machining on the shoe last 1.
[0025] In order to make the positioning head 3 move stably, such as Figure 3 and Figure 4 As shown, a guide groove 5 is provided on the positioning support 2, and the positioning head 3 is connected to the slider 4, which slides within the guide groove 5. Driven by the positioning power source 6, the slider 4 can move stably left and right within the guide groove 5; of course, the guide groove 5 can be a guide rail, both are equivalent and fall within the scope of protection of this patent.
[0026] In order to enable the two positioning heads 3 to move relative to each other, this utility model provides three embodiments.
[0027] Example 1: The positioning power source 6 is a cylinder, and each slider 4 is connected to a cylinder for transmission. By pushing with two cylinders, the two positioning heads 3 can move relative to each other, thus fixing the shoe last 1 in place.
[0028] Example 2: Figure 3 As shown, one slider 4 is fixed, and the other slider 4 is connected to a cylinder for transmission. During operation, the shoe last 1 is placed on the fixed positioning head 3 by the manual, and the cylinder drives the other movable positioning head 3, which can also achieve fixation.
[0029] Example 3: Figure 4 As shown, a push block 8 is provided on the positioning support 2. The push block 8 is connected to the positioning power source 6. The push block 8 has two push parts 80, each with a push inclined surface 81. The slider 4 has a force-receiving inclined surface 40. The push inclined surface 81 of the push part 80 can act on the force-receiving inclined surface 40 of the slider 4, causing the two sliders 4 to move relative to each other. The sliders 4 can be reset under the action of a spring. This embodiment only requires one positioning power source 6 (which can be a cylinder or a motor). The positioning power source 6 drives the push block 8 to move forward. The two push parts 80 of the push block 8 act on the force-receiving inclined surface 40 of the slider 4 through their push inclined surfaces 81. In this way, the push block 8 can simultaneously push the two sliders 4 to move relative to each other, thus enabling the two positioning heads 3 to move relative to each other. When the push block 8 is reset, the slider 4 is also reset under the action of a spring, so that the two positioning heads 3 are relatively far apart, waiting for the next positioning operation.
[0030] Finally, it's worth mentioning that this shoe last precision machining positioning device includes an infrared laser probe 7, which is used to detect whether the shoe last 1 is located at the positioning point between the two positioning heads 3. For example, if a positioning reference mark is found on the shoe last 1, when the light emitted by the infrared laser probe 7 shines on this mark, it means that the shoe last is located at the positioning point; when the light emitted by the infrared laser probe 7 does not shine on this mark, it means that the shoe last 1 is not located at the positioning point between the two positioning heads 3, and then the positions of the two positioning heads 3 need to be adjusted until the shoe last 1 is located at the positioning point between the two positioning heads 3 when it is clamped by the two positioning heads 3.
Claims
1. A shoe last, comprising a shoe last body, the shoe last body having left and right side support surfaces, characterized in that: The two side support surfaces have two opposing positioning grooves (10), and the diameter of the two positioning grooves (10) is gradually decreasing from the outside to the inside.
2. A shoe last precision machining positioning device, characterized in that: The positioning support (2) and the positioning power source (6) are used for positioning the shoe last (1) according to claim 1. The positioning support (2) is provided with two positioning heads (3) that can move relative to each other. The outer diameter of the positioning head (3) is gradually smaller from one end to the other end. One positioning head (3) matches a positioning groove (10) of the shoe last (1) and the other positioning head (3) matches another positioning groove (10) of the shoe last (1). The positioning power source (6) can drive the two positioning heads (3) to move relative to each other.
3. The shoe last precision machining positioning device according to claim 2, characterized in that: The positioning support (2) is provided with a guide groove (5), the positioning head (3) is connected to the slider (4), and the slider (4) is slidably disposed in the guide groove (5).
4. The shoe last precision machining positioning device according to claim 3, characterized in that: The positioning power source (6) is a cylinder, and each slider (4) is connected to a cylinder for transmission.
5. The shoe last precision machining positioning device according to claim 3, characterized in that: The positioning support (2) is provided with a push block (8), which is connected to the positioning power source (6) for transmission. The push block (8) has two push parts (80), each push part (80) has a push inclined surface (81), and the slider (4) has a force-receiving inclined surface (40). The push inclined surface (81) of the push part (80) can act on the force-receiving inclined surface (40) of the slider (4) and cause the two sliders (4) to move relative to each other. The slider (4) can be reset under the action of the spring.
6. The shoe last precision machining positioning device according to claim 2, characterized in that: It includes an infrared laser probe (7), which is used to detect whether the shoe last (1) is located at the positioning point between the two positioning heads (3).